WO2018065521A1 - Procédé et dispositif pour l'alimentation uniforme d'un convoyeur continu - Google Patents

Procédé et dispositif pour l'alimentation uniforme d'un convoyeur continu Download PDF

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Publication number
WO2018065521A1
WO2018065521A1 PCT/EP2017/075347 EP2017075347W WO2018065521A1 WO 2018065521 A1 WO2018065521 A1 WO 2018065521A1 EP 2017075347 W EP2017075347 W EP 2017075347W WO 2018065521 A1 WO2018065521 A1 WO 2018065521A1
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WIPO (PCT)
Prior art keywords
continuous conveyor
continuous
speed
conveyor
discharge device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
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PCT/EP2017/075347
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English (en)
Inventor
Karl SEMILLER
Michael STRÖDER
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Outotec Finland Oy
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Outotec Finland Oy
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Filing date
Publication date
Priority claimed from DE102016119044.6A external-priority patent/DE102016119044A1/de
Priority claimed from DE102016119107.8A external-priority patent/DE102016119107A1/de
Priority claimed from DE102016119086.1A external-priority patent/DE102016119086A1/de
Priority to CA3039114A priority Critical patent/CA3039114A1/fr
Priority to BR112019006630-6A priority patent/BR112019006630B1/pt
Priority to CN201780064033.4A priority patent/CN109843759B/zh
Priority to MX2019003782A priority patent/MX2019003782A/es
Application filed by Outotec Finland Oy filed Critical Outotec Finland Oy
Priority to EA201990705A priority patent/EA036991B1/ru
Priority to UAA201903910A priority patent/UA125521C2/uk
Publication of WO2018065521A1 publication Critical patent/WO2018065521A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
    • B65G43/08—Control devices operated by article or material being fed, conveyed or discharged
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G69/00—Auxiliary measures taken, or devices used, in connection with loading or unloading
    • B65G69/04—Spreading out the materials conveyed over the whole surface to be loaded; Trimming heaps of loose materials
    • B65G69/0408—Spreading out the materials conveyed over the whole surface to be loaded; Trimming heaps of loose materials by relatively moving an endless feeding means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
    • B65G2201/04—Bulk
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
    • B65G2201/04—Bulk
    • B65G2201/045—Sand, soil and mineral ore

Definitions

  • the invention relates to a method and the corresponding device for feeding a continuous conveyor with granular material, wherein at least two loading devices are moved to each other such that each loading device forms a continuous lane of the material on a bearing area of the continuous conveyor and wherein these lanes are parallel to each other and overlap such that a single material bed on the bearing area is formed, wherein the material bed in a cross section being orthogonal to the bearing area has the form of a trapezoid and wherein the parallel sides of the trapezoid are parallel to the bearing area.
  • Continuous conveyors or also elevators are transport systems generating a continuous transport stream. They are in particularly suitable for the transport of mass streams of large amounts of material or continuously required materials on predefined routes. In addition, they are particularly suitable for transporting bulk material. They are characterized by a continuous and/or steady movement and so they differ from the discontinuous conveyors which move the material to be transported in single cycles.
  • Continuous conveyors are available as floor-bound or floor-free systems.
  • Floor- bound continuous conveyors are capable of transporting the material to be transported in a horizontal, inclined and vertical manner. They are connected with the disadvantage that they occupy much space and that the route of transportation is predefined. In most fields of application floor-free systems are rail-bound.
  • Continuous conveyors are automated devices and are constructed for uninterrupted operation, and therefore they often are characterized by a simple type of construction as well as low energy consumption. Inter alia, they are used, when materials and goods of the chemical industry, in the mining industry, in surface mining, of the metal production and processing industry, in power plants, in the production flow, in the storage area are provided and/or removed and anywhere else, when single production steps are connected.
  • continuous conveyors are in particularly mechanical conveyors and gravity conveyors.
  • the mechanical conveyors are roller conveyors with driving unit, oscillating conveyors, cycle conveyors, carousel conveyors, belt conveyors, cellular wheel sluices, bucket elevators, chain conveyors, screw conveyors and endless-rope haulage systems as well as chains of wagons.
  • Gravity conveyors are in particularly the spiral chute and any form of tracks such as roller paths, ball transfer tables and unpowered track railways.
  • Such a method for feeding a continuous conveyor with preferably granular material comprises at least two loading devices. These two loading devices can be moved to each other, wherein this, for example, can be realized by a suitable driving unit, in particularly in a hydraulic manner, pneumatic manner or by an (electric) engine for at least one loading device. But it is also possible to realize the possibility of a mechanical movement to each other, for example, by snapping into place in different positions. Basically, the possibility of a movement to each other can be realized in a continuous or discontinuous manner, wherein a possibility of a continuous movement to each other allows a better adjustment of both loading devices, because so they can occupy each position.
  • each loading device With each loading device a continuous lane of the material is applied onto the bearing area of the continuous conveyor, for example on a conveyor belt.
  • both loading devices are moved to each other such that the lanes are parallel and overlap each other such that a single material bed on the bearing area is achieved.
  • overlapping means that by the application of the lanes by the loading device a bulk material plane with beveled sides in the sense of a slope being determined by the bulk properties of the material is obtained and that the sides of the two beveled bulk material planes of the at least two loading devices overlay each other such that a single material bed is achieved on the bearing area, wherein the formed single material bed in a cross section being orthogonal to the bearing area has the form of a trapezoid and the two sides of the trapezoid which are parallel to each other are also parallel to the bearing area of the continuous conveyor, such as for example of a conveyor belt.
  • the single lanes of the at least two loading devices in total form a trapezoid profile from which cannot be followed that it is composed of different single lanes.
  • the material bed is formed parallel to at least one edge of the bearing area with a deviation of at most 10°, preferably 5°, particularly preferably 2°.
  • a deviation of at most 10°, preferably 5°, particularly preferably 2° is formed on the transport area, since also such ones would result in a nonuniform feeding. Therefore, accordingly, a movement of one of the at least two loading devices has to be conducted slowly in relation to the transport speed of the continuous conveyor.
  • the granular material contains iron.
  • At least one measuring device examines that side of the material bed which is parallel to the bearing area with a distance D of at least one centimeter thereto.
  • This measuring device or these measuring devices examine(s) this side for minima and/or maxima and thus, in this way, non-uniformities can be determined.
  • the loading devices again can be move to each other such that again a material bed is formed which in a cross section being orthogonal to the bearing area of the continuous conveyor has the form of a trapezoid and wherein the sides of said trapezoid which are parallel to each other are also parallel to the bearing area.
  • a measuring device which is capable of measuring the overall trapezoid profile on the bearing area so that with it the cross-sectional area of the profile can be calculated. So with it, by multiplying by the transport speed of the continuous conveyor, the volume stream (volumetric flow rate) of the bulk material to be conveyed can be calculated.
  • the upstream process step can be modified, e.g.
  • the downstream process step such as for example the pellet kiln
  • the downstream process step can be prepared for the changed volume stream of the bulk material in the sense of a feed forward control, e.g. by an accordant change of the transport speed of the traveling grate in the pellet kiln.
  • each loading device adds its respective lane on that side of the bearing area to the already present lane on which this loading device is present.
  • a first loading device forms a first lane on the bearing area, being preferably arranged in the middle thereof. Adjacent thereto on a first side a second loading device is present which on this first side adds the second lane being parallel to the first lane and overlapping with it.
  • a third loading device adds a third lane which again on this second side is added to the first lane in a parallel and overlapping manner.
  • the fourth, sixth and finally 2 nd lane is added on the first side to the second to finally the 2n-2 nd lane, whereas on the second side the fifth to finally the 2n+1 st lane is added to the third to finally the 2n-1 st lane.
  • the overall trapezoid profile consists of an even number of lanes, then on the second side the 2n-1 st lane is the outermost lane which is added to the 2n-3 rd lane in a parallel and overlapping manner.
  • the loading devices In particularly in the case of at least three loading devices it was shown to be advantageous to arrange the loading devices on both sides of the continuous conveyor in its operating direction one after the other in their positions P such that the loading devices, starting with the at first applied lane, add their lanes in the lane positions 2 to 2n on that side of the bearing area to the already present lane on which they are arranged.
  • the loading device(s) being arranged downstream with respect to this loading station on the respective side is moved such that it occupies on the respective side the position(s) P-1 , thus respectively that position which has been till now the upstream position.
  • the loading devices are arranged on both sides of the continuous conveyor in its operating direction one after the other in position so that the loading devices, starting with the at first applied lane, add their lanes in lane position 2 to 2n or 2n+1 .
  • they add their lanes on that side of the bearing area to the already present lane on which they are arranged.
  • the loading devices on this side being arranged downstream one after the other with respect to this loading device a are moved such that they occupy the position P+1 , thus respectively that position which has been till now the downstream position.
  • material streams of one loading device increase or decrease.
  • each supplying continuous conveyor is proportional to the mass stream of material being transported on it.
  • the movement of the loading device is conducted with a speed which is lower than 18 %, preferably lower than 9 %, particularly preferably lower than 3.5 % of the speed of the conveyor belt. So it is possible to prevent larger faults in downstream process steps due to accumulations or shortages of material .
  • the ratio of the movement speed to the speed of the conveyor belt can be calculated with the help of the tangent of the desired angle. With large angles (correspondingly high movement speed of the loading device in relation to the speed of the conveyor belt), when material is transferred onto the continuous conveyor, in each case a fault is caused. According to that, for example, when a movement of 10° is realized, the movement speed is 18 % of the speed of the conveyor belt, and when an adjustment of 2° is realized, the movement speed is 3.5 % of the speed of the conveyor belt.
  • the corresponding loading devices are moved with 17.5 % of the speed of the continuous conveyor, for quickly solving the problem. But when only a small defect in the overlay of two adjacent lanes is detected, then the corresponding loading devices will only be moved with 1 .75 % of the belt speed in the sense of a fine tuning, for preventing an overshooting of the regulating device.
  • the discharge device adds parallel lanes on the second continuous conveyor which ideally adjoin to each other such that a continuous material bed is achieved.
  • the single lanes which are applied or added on the second continuous conveyor by the discharge device of the first continuous conveyor form an overall material bed which is designed such that it is not possible to see that it consists of different single lanes.
  • the system of applying material from one continuous conveyor onto another continuous conveyor can also be found in other fields of application, in particularly then, when the first continuous conveyor is used for collecting material originating from different sources and when the second continuous conveyor is arranged in a transverse direction with respect to the first continuous conveyor.
  • first continuous conveyor is used for collecting material originating from different sources
  • second continuous conveyor is arranged in a transverse direction with respect to the first continuous conveyor.
  • both continuous conveyors have the same transport direction.
  • a first continuous conveyor which preferably, but not necessarily has been charged according to one of claims 1 to 9 transports material with a material bed Mi having a mean width B l .
  • Width in the sense of the invention means the measure of the material bed being orthogonal to the transport direction Ti of the first continuous conveyor.
  • This continuous conveyor transports the material into the direction of a discharge device.
  • This discharge device can be moved in two running directions, wherein the first running direction is opposite to the second running direction. In the first running direction the discharge device has a first running speed v A i, in the second running direction the discharge device has a running speed v A 2-
  • a second continuous conveyor is arranged such that the discharge device with its both running directions is moved to and fro over the desired width B 2 of the material bed M 2 on the second continuous conveyor.
  • the width in the sense of the invention corresponds to the measure of the bed being orthogonal to the transport direction T 2 of the second continuous conveyor.
  • the discharge device continuously applies material onto the second continuous conveyer in at least one, normally the second running direction.
  • this target can be achieved best, when the material flow of the first continuous conveyor to the discharge device is already a steady-state one and when the bed on the first continuous conveyor in an orthogonal direction with respect to the transport direction Ti ideally has a trapezoid profile.
  • the second continuous conveyor is moved with a speed v 2 which is within a range which follows from the running distance of the discharge device in the sense of the width of the material bed on the first continuous conveyor B 2 , from the width of the material bed on the first continuous conveyor B l and from both running speeds of the discharge device v A i and v A2 . According to the invention the following is true:
  • This formula represents the most general case, namely that the speeds v A 1 and v A2 are different from each other and that both are variable over the width B 2 . In practice, this in fact is the case, because it not possible to accelerate the discharge device at the turnaround points to the desired speeds v A i or v A2 an arbitrarily short time.
  • the discharge device during the application in one running direction applies a material lane onto the second continuous conveyor to which then the next material lane is added nearly seamlessly, and so a continuous material bed M 2 on the second continuous conveyor is achieved. So a continuous, ideally steady-state material flow on the second continuous conveyor can be achieved, so that also subsequent process steps are charged uniformly which results in an increase with respect to the throughput and/or a homogenization of the product quality.
  • the profile is completely seamless, when the following is true
  • widths B l and B 2 are defined as the widths of the trapezoid profiles at the half height (thus mean width).
  • the first and the second running speeds v A i and v A 2 of the discharge device - with the exception of the algebraic sign - are identical and they are nearly constant during the running time so that a uniform movement of the discharge device in both directions results.
  • This allows a particularly simple form of the driving unit for the discharge device.
  • both running speeds v A i and v A 2 of the discharge device are equated with the transport speed of the first continuous conveyor so that the discharge device in the first running direction does not discharge material onto the second continuous conveyor and that in the second running direction of the discharge device exactly one material lane is applied onto the second continuous conveyor.
  • the following simplified formula for calculating the transport speed v 2 of the second continuous conveyor according to the present invention is true
  • the discharge device applies two material lanes onto the second continuous conveyor one upon the other, wherein, like above, only in the second running direction of the discharge device material is applied onto the second continuous conveyor.
  • higher material loads of the second continuous conveyor can be achieved. Then for the range of the transport speed v 2 of the second continuous conveyor the following is true
  • the mean width B l is the mean width of this trapezoid which is determined in an orthogonal direction with respect to the transport direction Ti of the first continuous conveyor.
  • the granular material contains iron.
  • the example of the transport of green pellets from the pelletizing disks which are used for their production to the burning in a traveling grate plant shows that such a method is connected with decisive advantages, because only a uniform feeding of the grate wagons of the traveling grate can guarantee that at the present conditions in the plant the used material is burned uniformly and that so at the end of the process a homogenous product quality can be achieved.
  • a first measuring device examines the material bed on the first continuous conveyor for minima or maxima in longitudinal and transverse directions with respect to the transport direction Ti of the first continuous conveyor. So it is possible to detect, when already the first continuous conveyor is charged in a non-uniform manner, and measures can be taken for guaranteeing a steady-state material flow here again.
  • a further preferable embodiment of the invention includes that a second measuring device examines the material being applied onto the second continuous conveyor for minima and/or maxima. So it can be determined, if here a non-uniform feeding takes place.
  • a second measuring device examines the material being applied onto the second continuous conveyor for minima and/or maxima. So it can be determined, if here a non-uniform feeding takes place.
  • the material bed on the first continuous conveyor is examined for minima or maxima, then it is possible to correlate the results of the second measuring device with the results of the first measuring device, and thus influences of a non-uniform feeding of the first continuous conveyor can be eliminated.
  • the second measuring device detects minima which occur, in addition, at least three times one after the other periodically with the periodic time of the movement to and fro of the discharge direction, then this means that the speed of the second continuous conveyor has to be adjusted in the sense of a regulation.
  • the driving speed of the driving unit of the second continuous conveyor (thus its transport speed v 2 ) has to be reduced. This preferably is realized by a gradual decrease of the transport speed of the second continuous conveyor.
  • the reason for that is that the cause of the minima is a gap between two lanes being applied by the discharge device or an insufficient overlay between these two lanes.
  • the driving speed of the driving unit of the second continuous conveyor and/or its transport speed have to be increased, because the reason for these maxima is a double bed in the edge region of two lanes being applied by the discharge device onto the second continuous conveyor.
  • this is achieved by very slowly increasing the speed of the second continuous conveyor, till the maximum cannot be detected any longer.
  • the reduction or the increase of the transport speed v 2 of the second continuous conveyor preferably amounts only to 1 % in 15 s.
  • the reason for this very slow change of the speed is the dead time which elapses, till a change of the distance between two lanes applied by the discharge device reaches the measuring device.
  • the measuring device should be arranged as near as possible with respect to the first continuous conveyor so that the dead time is short. In the specific example this means, that for B?
  • the transport speed v 2 should preferably be increased in steps of 0.1 m/s, particularly preferably 0.05 m/s, particularly preferably 0.01 m/s. In the case of larger steps there is the risk that the regulating circuit overshoots.
  • the mean height of the bed in the feeding zone of the traveling grate corresponds with the respective process conditions, however not, how the form of the bed itself is designed.
  • the mean height of the bed is regulated by varying the transport speed v of the traveling grate such that it corresponds to the height of the side walls S of the grate wagons.
  • optional waves and asymmetric forms of the surface of the pellet bed on the traveling grate are not automatically corrected, although they may have indeed a troublesome influence onto the process of pellet burning.
  • the filling degree of a horizontal profile is lower than the filling degree of a profile with a convex form with respect to the bearing area of the grate wagon, because in the case of the convex profile with the volume of the vaulted part above the horizontal profile an additional filling volume is created.
  • the gas flow within a grate wagon is not homogenous, in particularly in the burning zone. The reason for that is that the temperature profile of the hot flue gasses over the width of the hood (thus in x direction) is not homogenous.
  • the hot flue gas is present in the burning zone in the hood and by a low pressure in the wind box below the grate wagon it is sucked through the pellet bed.
  • the flue gas in the center of the hood has a higher temperature than the flue gas at the rims of the hood. This results in different flow conditions within the pellet bed of a grate wagon, wherein in the center of the grate wagon more heat is transferred from the flue gas to the pellets so that the pellets in the center reach the desired quality in a shorter time than the pellets being located at the rims of the grate wagon.
  • the width of the material bed of a continuous conveyor is the dimension of the bed in the orthogonal direction with respect to the transport direction of the continuous conveyor.
  • the width of the material bed of a continuous conveyor is the dimension of the bed in the orthogonal direction with respect to the transport direction of the continuous conveyor.
  • a first continuous conveyor material in a material bed having a mean width B l is transported into or onto a discharge device.
  • the material bed on the first continuous conveyor in a cross section through the material being orthogonal to the transport direction ⁇ ⁇ has the form of a trapezoid, wherein both parallel sides of the trapezoid are also parallel to the bearing area of the first continuous conveyor. Therefore, in particularly, the mean width B l is the mean width of the trapezoid so formed.
  • the discharge device is moved in a first running direction L Al with a first running speed v Al and in a second running direction L A2 with a running speed v A2 , wherein the orientations of both running directions are preferably opposite to each other and wherein the first running direction L Al corresponds with the transport direction ⁇ ⁇ of the first continuous conveyor.
  • first running direction L Al corresponds with the transport direction ⁇ ⁇ of the first continuous conveyor.
  • the discharge device is moved over the width B 2 of the material bed of a second continuous conveyor, wherein here the movement may not necessarily describe a straight distance.
  • the width B 2 of the material bed on the second continuous conveyor has to be understood in the sense of the invention in an orthogonal direction with respect to its transport direction T 2 and thus means in practice normally the width of the bearing area of the second continuous conveyor minus a safety distance on both sides.
  • the discharge device continuously applies in at least one running direction, preferably in running direction L A2 material onto the second continuous conveyor. It is a subject matter and a basic idea of the invention that during the process of applying material onto the second continuous conveyor by the discharge device the running speed v 2 of the discharge device is varied and thus is not constant. This means that the running speed v 2 of the discharge device comprises at least three minima and/or one maximum over the width B 2 .
  • maxima and minima and profiles over the width B 2 of the material bed (x direction) on the second continuous conveyor can be created, while the height of the material bed on the second continuous conveyor in y direction ideally is constant at each coordinate x * ( 0 ⁇ x* ⁇ B 2 ), even though it is not identical with the height of the material bed on the second continuous conveyor at another coordinate x ** ( 0 ⁇ x * * ⁇ B 2 ,x * * ⁇ x * ).
  • the changing running speed v A2 (x) is characterized by a minimum in the middle of the width B 2 of the material bed of the second continuous conveyor.
  • the discharge device discharges material in only one running direction L A2 .
  • the mean running speed v Al * is exactly the transport speed v l of the first continuous conveyor. This corresponds to the mode of operation being common at the moment.
  • h ⁇ x a - x 2 + b - x with a ⁇ 0 and 0 ⁇ b ⁇ l
  • the material bed, as described above, on the first continuous conveyor has the form of a trapezoid.
  • trapezoid means that a cross section through the material being orthogonal to the bearing area of the continuous conveyor is formed, wherein both parallel sides of the trapezoid are also parallel to the continuous conveyor and/or to its bearing area. Therefore, in particularly, the mean width B l is the mean width of the trapezoid so formed.
  • a first measuring device examines the material bed on the first continuous conveyor for minima or maxima in transverse direction (y direction) and/or a second device examines the material being applied onto the second continuous conveyor for periodic minima or maxima in the course of time, thus in the case of a stationary measuring device also examines the material bed on the second continuous conveyor which is running through beneath it for periodic minima and maxima in y direction.
  • Periodic changes of the bed height h on the second continuous conveyor in the course of time are detected by the second measuring device. They indicate that the transport speed v 2 of the second continuous conveyor is not exactly adjusted to the mean running speed v A2 * of the discharge device. Rather, in the case of the detection of periodic minima arising in the periodic time of the movement to and fro of the discharge device it would be such that the second continuous conveyor runs to fast so that the discharge device is not capable of applying uniformly and/or sufficiently overlapping lanes on it.
  • a third measuring device measures the actual profile of the material stream with the width T 4 being applied onto the fourth continuous conveyor with the transport direction T 4 and the transport speed v 4 and when a regulating device correlates the actual status so measured with a desired status representing the ideal profile of the material bed on the fourth continuous conveyor.
  • the desired status of the profile on the fourth continuous conveyor can exactly be achieved by regulating.
  • the desired profile on the fourth continuous conveyor - similarly as in the case of the desired profile on the second continuous conveyer - may be a linear, convex, triangle-shaped, arc-shaped, parabolic, trapezoid or also concave one, respectively symmetric with respect to the centerline of the fourth continuous conveyor or also asymmetric thereto.
  • the height of the desired profile at the edges of the width B 4 can also be > 0. This is absolutely reasonable for the gas flow through the material bed on the fourth continuous conveyor in the sense of a thermal treatment, because otherwise the flow resistance in the edge region would be very low. This would result in the fact that the gas to be passed through preferably flows through at the edges of the material bed, however where it does not meet much solid. A low thermal efficiency of the thermal treatment would be the result.
  • This third measuring device should in particularly be used, when between the second and the fourth continuous conveyors still a third continuous conveyor with the transport direction ⁇ 3 , the transport speed v 3 and the width of the material bed B 3 is inserted.
  • the widths of the material beds B 2 , B 3 and B 4 typically only differ by at most 20 %, preferably by less than 10 %, however the transport speeds v 2 , v 3 and v 4 all are different from each other.
  • the roller screen besides its transport function has also the function of a screen for material grains which are too small and/or too large.
  • the mentioned measuring devices may provide continuously or discrete measuring results, wherein continuously and discrete mean both, with respect to the time of the measurement and thus to the local measuring points in movement direction of the first, second or a third or fourth continuous conveyor and also with respect to the widths of the material beds ⁇ ⁇ , B 2 , B 3 or B 4 .
  • These measurements may be conducted in a continuous manner or within single intervals, wherein during the running of the discharge device in each of both running directions at least two, preferably at least four measurements are conducted.
  • Frequent measurements result in the advantage that also small deviations from the respective desired profile can be identified and that with the help of the second measuring device it is easier to distinguish between periodically recurring non-uniformities, which are the result of an imperfect tuning between the mean running speed v A2 * of the discharge pulley and the speed v 2 of the second continuous conveyor, and other deviations.
  • the measuring devices it is possible to detect discrete or continuous differences between the actual state and the desired state of the heights hdesired(x) and hactuai(x) over the widths B 2 , s 3 or B 4 of the applied beds on the second or a downstream continuous conveyor.
  • the running speed of the discharge device in the material- applying running direction(s) as a function of the coordinate x is adjusted.
  • the previous vectorial speed v old (x) during the application of the material in one or in both running directions L Al and L A2 is changed such that the desired new vectorial speed v new normed ⁇ x) during a constant time ⁇ of the application of material is as follows
  • a is a dimensionless damping factor which is ⁇ 1 , preferably ⁇ 0.5, particularly preferably ⁇ 0.2. With a suitable choice of the damping factor a an overshooting of the regulating device can be avoided.
  • 00 is tne new running speed of the discharge device, preferably of a discharge pulley, being discretized as a vector and being defined as follows:
  • the new running speed being defined as a vector and being discretized v A2tnew (x) of the discharge pulley can be calculated according to the following equation
  • h 4 , deS i r ed(x) and h 4 , a ctuai(x) are the heights of the desired and the actual profiles of the bed on the fourth continuous conveyor being discretized in vectorial form.
  • v A2 new (x) is conducted with the same number of steps as the discretization of the bed profiles h 4 ,desired(x) and h 4 , ac tuai(x) on the fourth continuous conveyor, even in the case, when the widths of the material beds B 2 and B 4 are different.
  • the running speed v A2 (x) of the discharge device and the profiles of the beds on the fourth continuous conveyor may be discretized in 41 equidistant steps each so that they can be expressed as vectors comprising 41 lines each. Then the 21 st , thus the line in the middle of the equation being written in vectorial form is as follows:
  • the profile of the running speed v A2 (x) can vectorially be regulated such that an actual profile h 4 actual (x) which corresponds with the desired profile h desired (x) can be achieved on the fourth continuous conveyor.
  • the discharge device discharges material only during the running direction L A 2-
  • the running speed v A2 (x) in this running direction L A2 dependent on the coordinate x of the discharge device is varied.
  • the mean running speed v A2 * can be chosen freely, but it is restricted by technological limits of the conveyor technique.
  • the use of very high-powered driving units for the acceleration of a mass with a weight which is so high that it cannot be ignored has to be avoided due to constructive and financial reasons.
  • the running speed v A i of the discharge device in the running direction L A L (forward moving), in which the discharge device does not apply material is also 0.5 m/s.
  • the width B 2 of the second continuous conveyor is 4 m, thus, the duration ⁇ ⁇ ⁇ of this movement - when acceleration and deceleration processes are ignored - is 8 s.
  • the speed profile v A2 (x) of the discharge device is chosen in a targeted manner such that the desired bed profile results.
  • the speed of the discharge device is 0, on the second continuous conveyor only a slim, but high lane of material, e.g. of green pellets, would be found, the profile of which would generally be determined by the angle of repose of the material. From that it becomes clear that in the case of a slower movement of the discharge device a higher bed height results than in the case of a faster movement. Thus, a convex bed profile will be provided, when the discharge device during the application of material is moved slower in the middle of the second continuous conveyor than in the edge regions thereof.
  • a first approximation of the speed profile of the discharge device for generating convex desired profiles h 2 desired (x) on the second continuous conveyor can be calculated in closed form which seems suitable for a parabolic bed profile or by discretization of an arbitrary bed profile.
  • This first approximation allows a control of the running speed v A2 (x) of the discharge device which may change dependency on the special site during the running direction L A2 during which material is applied, wherein here still no measuring of the actual state of the bed profile is required.
  • a discretization can e.g.
  • the pre-calculated speed profile in continuous distances such as about every 5 or 10 cm so that the pre-calculated speed profile is than available as a vector v A2 pre _ calculated (x) which in the case of a given width B 2 of 4 m with distances of 5 cm comprises 81 values or in the case of distances of 10 cm comprises 41 values.
  • the first and the last values of the vector always are the values of the desired bed heights at the edges of the second continuous conveyor. Assuming that the second continuous conveyor is a conveyor belt having a horizontal bearing area, the desired bed height at the edges is always 0. When the conveyor belt comprises upturns in the edge region, then the desired bed height in the edge region may also be > 0.
  • the desired bed profile h 4 des!red (x) the duration of the movement of the discharge device during the running speed L A 2 during which material is applied and the pre-calculated running speed profile v A2tPre _ calculated (x) are stored.
  • these values will not be changed after the start of the operation of the plant and respective optimization measures, but rather they will be kept constant during continuous operation.
  • these stored data are used again.
  • the discharge device has applied material during some movement cycles onto the second continuous conveyor, a short time before the start of the running direction L A2 during which material is applied each the speed profile v A2,new( x ) of the discharge device is calculated according to the above-mentioned formula. For that the actual profile h 4 actual (x) on the fourth continuous conveyor is measured in the described manner and stored.
  • the actual profile h 4 actual (x) on the fourth continuous conveyor is measured in discrete distances of for example 5 or 10 cm over the width B of the fourth continuous conveyor.
  • the desired profile h 4 desired (x) on the fourth continuous conveyor is discretized in the same manner.
  • the measured actual profiles h 4 actual (x) for which e.g. measurements every 0.1 s have been conducted and stored, are averaged over a whole discharge cycle. In this example, thus, during a total movement cycle of the discharge device with a periodic time of 24 s 240 profiles are averaged. This averaged actual profile being written as a vector is then used in the above-mentioned equation as
  • h desired (x) and to divide the difference by the desired height in the middle of the fourth continuous conveyor.
  • a dimensionless deviation is obtained which is a negative one, when the local actual height is smaller than the local desired height. But it is a positive one, when the local actual height is larger than the local desired height.
  • the values of the dimensionless deviation being also written as a vector are nearer to 0 than to -1 or +1 .
  • the integral of the reciprocal value of the path-dependent speed over the width B 2 of the second continuous conveyor provides a duration of the backward movement of the discharge device in running direction L A2 .
  • this duration is becoming longer than the intended duration which has to be kept constant ⁇ ⁇ 2 , then the speed v A2 (x) is increased according to the above-mentioned equation, which results in the adjustment of the desired duration % A 2 again.
  • the complete material application is again conducted without any regulating interventions within this cycle, rather, then the actual profiles are stored again and are used for regulating the subsequent discharge cycle in the described manner.
  • the material from the pelletizing disks is collected on a first continuous conveyor, then the material from the first continuous conveyor is transferred by means of a discharge device onto the second continuous conveyor, wherein it is possible to form profiles here, and subsequently the material is transferred via a roller screen which can be regarded as a third continuous conveyor into the grate wagons of a traveling grate plant, wherein the traveling grate itself has to be regarded as the fourth continuous conveyor.
  • the third continuous conveyor can transfer material onto a fourth continuous conveyor.
  • the material from the second continuous conveyor can directly be transferred onto the fourth continuous conveyor.
  • the third continuous conveyor and/or the fourth continuous conveyor comprise a measuring device each.
  • a mean bed height actuaf of the material bed 3 on the third continuous conveyor is determined and this determined actual value is compared with a predetermined desired value desired ⁇
  • the actual value actua f is lower than the predetermined desired value K ⁇
  • the speed v 3 of the third continuous conveyor is too low so that the residence time of the material on this third continuous conveyor and thus the mean bed height are becoming longer and larger, respectively, than desired.
  • the transport speed v 3 of the third continuous conveyor is increased or decreased in a discrete or continuous manner so long, until the mean bed height h ⁇ ctua f again corresponds with the desired value
  • a measuring device above the fourth continuous conveyor can determine the actual profile of the material bed on this conveyor and when an evaluation unit connected therewith can calculate the cross sectional area of this material bed.
  • this cross sectional area is determined in an orthogonal direction with respect to the transport direction T 4 of the fourth continuous conveyor.
  • This calculated actual value of the cross sectional area Q 4 actual being based on the measurement is compared with a desired value Q 4 desired .
  • the material stream, when the first continuous conveyor is fed can be influenced in such a way that the actual value of the cross sectional area Q 4 actual is brought more into line with the desired value Q 4 desired ⁇
  • the calculated actual cross sectional area Q 4 actual is smaller than the respective desired value Q 4 desired , then, when the first continuous conveyor is fed, more material is applied.
  • a deviation between the actual cross sectional area o A réelle , and the desired cross sectional area Q 4 desired can, for example, arise, when the size distribution of the grains of the bed material changes so that the grains become smaller and smaller and when the third continuous conveyor is a roller screen which screens out these smaller grains and therefore does not apply them onto the fourth continuous conveyor. Furthermore, it is essential for the regulating (device) being described here that the measuring device above the fourth continuous conveyor does also determine the actual height profile of the material bed on the fourth continuous conveyor.
  • the actual profile is different from the desired profile, but that the actual cross sectional area Q 4 actual exactly corresponds to the desired cross sectional area Q 4 deslred .
  • the regulating intervention may only consist of a manipulation of the speed v A2 (x) of the discharge device which may change dependency on the special site.
  • the actual profile corresponds indeed in its form with the desired profile, but that the actual cross sectional area ⁇ ⁇ remedy , differs from the desired cross sectional area o A J . , . ⁇ n such cases, normally, the measured profile in total is located too high or too low. In this case the regulating intervention with respect to the speed profile v A2 (x) of the discharge device is not helpful.
  • the actual cross sectional area Q 4 desired has to be brought more into line with the desired cross sectional
  • the granular material contains iron.
  • the example of the transport of green pellets from the pelletizing disks which are used for their production to the burning in a traveling grate plant shows that such a method is connected with decisive advantages, because only a changed feeding of the grate wagons of the traveling grate can guarantee that, on the one hand, the receiving capacity of the grate wagons is increased and, on the other hand, at the present conditions in the plant the used material is burned uniformly and that so at the end of the process a homogenous product quality can be achieved.
  • the invention comprises a device being characterized by the features of patent claim 10.
  • This device is preferably characterized by the features of at least one of claims 1 to 9 and the corresponding description.
  • Such a device comprises one continuous conveyor as well as at least two loading devices which are designed such that with each loading device a continuous lane of the granular material to be applied is formed on a bearing area of the continuous conveyor.
  • these lanes should be parallel to each other and should overlap each other such that a single material bed on the bearing area is formed, wherein the material bed in a cross section being orthogonal to the bearing area has the form of a trapezoid and wherein the parallel sides of the trapezoid are also parallel to the bearing area.
  • the device is designed such that at least one loading device can be moved transverse with respect to the longitudinal direction of the continuous conveyor.
  • a preferable embodiment of the invention is characterized by the fact that at least one loading device is a second continuous conveyor.
  • This makes it possible to transport material from previous process steps by means of a continuous conveyor, such as for example a roller screen or a further conveyor belt, to the first continuous conveyor so that this one serves as a collector for different material streams having the same or different compositions.
  • At least one further movable loading device is provided. So on both sides of the at first applied lane further lanes can be added which are added seamlessly with respect to the at first applied lane and thus represent an embodiment of the overall material bed in the sense of the invention. In the case of the failure of one single loading device the next loading device being arranged on the same side and being moveable can occupy its position.
  • the design of a first loading device is a static one and that it applies the first lane approximately in the middle of the continuous conveyor.
  • this first loading device fails, then the lane in the middle can be applied by each other moveable loading device, preferably by the second or the third loading devices. Therefore, due to higher costs, in the case of the first loading device a moveable design is not necessary.
  • all downstream loading devices are characterized by a moveable design so that the above-described movement of the loading device can be conducted in each set-up.
  • the described device comprises at least one measuring device which is capable of detecting flatness imperfections in the bed in the form of minima or maxima in the transverse direction of the continuous conveyor.
  • minima or maxima in the case of the described arrangement of the loading devices particularly often are created by the circumstance that the overlapping of adjacent lanes is still not optimal.
  • a groove being parallel with respect to the edge of the continuous conveyor in the surface of the bed can be created by the fact that the groove is located at the overlapping position of two lanes, wherein the distance between the centers of these two lanes for the respective volume streams was chosen to large.
  • Such measuring devices may, for example, be ultrasonic probes which are arranged on a beam side by side such that they cover the whole width of the continuous conveyor.
  • the width in the sense of the invention should be understood in an orthogonal direction with respect to the transport direction of the continuous conveyor.
  • laser systems or simple deflection methods such as for example one or more metal strips which are deflected stronger or not so strong by minima or maxima, which is then detected, for example, with the help of a rotary potentiometer being assigned to one metal strip each, can be used.
  • a measurement via ultrasonic probes also radar probes could be used.
  • the detection may also be conducted via an optical system, for example a camera, and then analyzed by means of a computerized picture analysis.
  • a device in which exclusively or in combination with the till now described devices being characterized by the features of at least one of claims 10 to 15 also material is transferred from a first to a second continuous conveyor comprises a first and a second continuous conveyor as well as a discharge device.
  • the first continuous conveyor is designed for the transport of a material bed Mi having a mean width B l and a transport speed into or onto the discharge device.
  • the discharge device is moved in a first running direction with a first running speed v A i and in a second running direction being opposite to the first one with a second running speed v A 2 over a width B 2 of the material bed M 2 of the second continuous conveyor.
  • This second continuous conveyor has the transport speed v 2 .
  • the discharge device at least in one running direction continuously applies material onto the second continuous conveyor.
  • the device comprises a controlling device, partially coupled with a regulating device which adjusts the transport speed v 2 of the second continuous conveyor to a value according to the following equation :
  • the first and/or the second continuous conveyor is a conveyor belt or a roller screen.
  • the design of a conveyor belt is preferable, because a conveyor belt is a particularly simple continuous conveyor.
  • a roller screen is connected with the advantage that so material having a size which is too large and/or too small (size in the sense of the diameter) can be unloaded from the process.
  • combinations of two continuous conveyors are possible, wherein for example a combination is conceivable in which at least one of the continuous conveyors partially consists of a conveyor belt and partially of a roller screen.
  • the discharge device is a discharge pulley.
  • This is a particularly simple solution for a discharge device which can be moved, for example, by a double-acting hydraulic cylinder in connection with a hydraulic pump and respective hydraulic valves or a rack and pinion gear with motor driving unit in connection with end switches which change the direction of rotation of the driving unit or an electric l inear motor with a respective control in two directions.
  • a slewing belt which applies the material from the first continuous conveyor onto the second continuous conveyor is used.
  • running direction in the sense of the invention does not necessarily mean a straight running direction, but only the movement from one side of the second continuous conveyor to the opposite side and back again and explicitly also, for example, a parabolic material application by the application with a slewing belt is comprised by the invention.
  • Another preferable embodiment of the invention comprises a measuring device which examines the material being applied onto the second continuous conveyor for minima and/or maxima.
  • this measuring device is mounted on the second continuous conveyor. Based on the measuring results of this at least one measuring device, then the transport speed of the second continuous conveyor can be influenced by the regulating device such that a steady-state material stream on the second continuous conveyor is provided.
  • the regulation is a fine tuning of the transport speed v 2 of the second continuous conveyor which also compensates perturbations such as time variable angles of repose of the material beds.
  • v 2 is the actuating variable
  • the controlled process variable is the mass stream, wherein the temporal fluctuations of which are regulated such that they are virtually zero.
  • Such a device comprises a first and a second continuous conveyor as well as a discharge device.
  • the first continuous conveyor is designed for transporting a material bed having a mean width B l into or onto the discharge device.
  • the discharge device is constructed such that it is moveable in a first running direction L A L with a running speed of v Al and in a second running direction L A2 being opposite to the first one with a running speed v A 2 over the width B 2 of the material bed on the second continuous conveyor.
  • the discharge device applies in at least one running direction, preferably in the running direction L A2 , lanes of material onto the second continuous conveyor.
  • the device comprises at least one controlling or regulating device (the last one preferable with a corresponding control unit) which controls and/or regulates the changing running speed, preferably v A2 (x) , of the discharge device in at least one running direction, preferably in the running direction L A2 , during the application.
  • the discharge device applies material only in one running direction and that during this material application the local running speed is changed or that the discharge device applies material in both running directions, wherein in at least one running direction the running speed is locally changed.
  • profiles in x direction preferably convex profiles, instead of a material bed having a trapezoid cross section can be formed on the second continuous conveyor and thus, for example, receiving capacities of downstream process steps can be increased.
  • the first and/or the second continuous conveyor is a conveyor belt or a roller screen.
  • a conveyor belt is a particularly simple and reliable form of a continuous conveyor and thus is preferable.
  • a roller screen provides the possibility, at the same time, to remove particles which are too small or too large from the material bed and thus to further homogenize the material bed.
  • roller screens have the disadvantage that they partially again homogenize adjusted profiles.
  • combinations of two continuous conveyors are possible, wherein for example a combination is conceivable in which at least one of the continuous conveyors consists partially of a conveyor belt and partially of a roller screen.
  • preferable is the embodiment of the invention in the form that both, the first and also the second continuous conveyor are conveyor belts and that after the second continuous conveyor a roller screen as a third continuous conveyor and a traveling grate plant as a fourth continuous conveyor follow.
  • the discharge device is a discharge pulley which, for example, can be moved by a double-acting hydraulic cylinder in connection with a hydraulic pump and respective hydraulic valves or a rack and pinion gear with motor driving unit in connection with end switches which change the direction of rotation of the driving unit or an electric linear motor with respective control in two directions.
  • running direction in the sense of the invention does not necessarily mean a straight running direction, but only the movement from one side of the second continuous conveyor to the opposite side and back again and explicitly also, for example, a circular arc-like material application by a slewing belt is comprised by the invention.
  • At least one measuring device which detects the profile of the material being applied onto the fourth continuous conveyor.
  • this measuring device is connected with the above-described regulating mechanism.
  • an arrangement is preferable which comprises two measuring devices, namely the first one above the first continuous conveyor and the second one after the application of the material onto the fourth continuous conveyor.
  • an arrangement which comprises three measuring devices, namely one measuring device each above the first, second and fourth continuous conveyors. So a successful regulating of deviations between the actual profile and the desired profile on the fourth continuous conveyor can be achieved in the shortest time.
  • At least one such measuring device may, for example, be ultrasonic probes which are arranged on a beam side by side such that they cover the whole width of the continuous conveyor.
  • the width in the sense of the invention should be understood in an orthogonal direction with respect to the transport direction of the continuous conveyor.
  • laser systems or simple deflection methods such as for example one or more metal strips which are deflected stronger or not so strong by minima or maxima, which is then detected, for example, with the help of a rotary potentiometer being assigned to one metal strip each, can be used.
  • radar probes can be used.
  • the detection may also be conducted via an optical system, for example a camera, and then analyzed by means of a software analysis.
  • fig. 6 an interconnection according to the present invention of a first, second, third and a fourth continuous conveyor in x-y direction
  • fig. 7 the interconnection of a first and a second continuous conveyor in x-z direction.
  • the continuous conveyor 10 may be an ordinary conveyor belt, as shown, which is operated in a revolving manner via at least one driving unit 12 such that the material to be transported is transported in the transport direction T.
  • the material is applied onto a bearing area 1 1 .
  • a roller screen as well as all above- mentioned types of a continuous conveyor are also conceivable.
  • the production devices 21 to 27 are devices for conducting an upstream process step. Here, for example, they may be pelletizing disks for the production of green pellets of iron ore.
  • the further continuous conveyors 31 to 37 lead to the continuous conveyor 10. They are designed such that at their ends they apply the material onto the continuous conveyor 10. In the simplest form this may be achieved by the fact that these continuous conveyors 31 to 37 are designed as conveyor belts which at the position of their respective discharge pulley discharge the material which is transported on them onto the continuous conveyor 10. Basically, it is also possible to omit the continuous conveyors 31 to 37 and to apply the material directly from the devices 21 to 27 onto the continuous conveyor 10.
  • the mass streams of the single lanes have not to be identical, i.e. the cross sectional areas of the single lanes may all be different.
  • all mass streams from all loading devices are the same, rather, this is a special case.
  • the continuous conveyors 32 to 37 have a design such that they can be adjusted in the movement direction V, and for that they comprise the adjustment devices 42 to 47. Preferably, they can be adjusted by a driving unit so that they can directly be moved by means of a primary control unit. But it is also conceivable here to provide a mechanical adjustment device which is operated in a manual manner, e.g. a crank mechanism.
  • the production device 23 fails, then its lane which is adjacent to the lane of device 21 is no longer added.
  • the information is obtained that the production device 23 has failed or when a minimum in the formed overall bed is detected which can be attributed to the production device 23, then it is possible to move the production devices 25 and 27 and/or the corresponding continuous conveyors 35 and 37 via the adjustment devices 45 and 47 such that the continuous conveyor 35 occupies the previous position of the continuous conveyor 33 and that the continuous conveyor 37 occupies the previous position of the continuous conveyor 35. So the vacancy being the result of the failure of the production device 23 is filled again, wherein the overall profile becomes slimmer.
  • the positions of the subsequent devices on the same side of the continuous conveyor are immediately changed with 17.5 % of the transport speed of the continuous conveyor 10 to the new positions. So the fault caused by the failure of one of the devices 21 to 27 is nearly completely remedied again within a few seconds.
  • a fine tuning of the moved loading devices is conducted during which minima and maxima in the surface of the bed are detected by means of the measuring device 50 and are compensated by slow movement of the loading devices which before have been moved relatively quickly. It is particularly preferable, when the movement speed during such a fine tuning is 1 .75 % of the belt speed.
  • a measuring device 50 is used for the detection of flatness imperfections in the formed overall material bed on the continuous conveyor 10 .
  • a measuring device 50 is used for the detection of flatness imperfections in the formed overall material bed on the continuous conveyor 10 .
  • Particularly preferable is also a detection after each second or third loading device.
  • the advantage of a higher number of measuring devices is that the dead time in the sense of the duration which passes by from the arising of a minimum or maximum till the detection by the measuring device is reduced.
  • the dead time may e.g. be 40 s. It is also conceivable that after each loading device 31 to 37 a measurement is conducted.
  • FIGS. 2a to 2d show different overall profiles of the material bed on the continuous conveyor 10 in a transverse direction with respect to its transport direction T in the case of a design according to figure 1 .
  • Figure 2a shows an ideal material bed being formed as a trapezoid on the bearing area 1 1 of the continuous conveyor 10. Both parallel sides of the trapezoid are parallel to the bearing area of the continuous conveyor.
  • Each supplying continuous conveyor 31 to 37 applies or adds its own lane S1 to S7 which here in parallel direction seamlessly adjoin each other such that this overall trapezoid profile is formed.
  • the single lanes S1 to S7 are assigned to the supplying continuous conveyors 31 to 37 on the basis of the last digit of the number.
  • Figure 2b shows the result of the failure of the production device 23 with the corresponding continuous conveyor 33 which has already been the theme in figure 1 , wherein at the respective position a minimum is obtained which corresponds to the absence of the whole lane S3.
  • Figure 2c shows then, how the overall material bed is again amended through the movement of the continuous conveyors 35 and 37 by the adjustment devices 45 and 47 to a material bed according to the present invention having the form of a trapezoid which now comprises one lane less.
  • the continuous conveyor 35 has occupied the position which was previously the position of the continuous conveyor 33 and the continuous conveyor 37 has occupied the position which was previously the position of the continuous conveyor 35.
  • Figure 2d shows then, how the overall profile is changed again, when the production device 23 is again switched on so that at this position via the continuous conveyor 33 again material is applied.
  • a maximum is formed, because continuous conveyor 33 and continuous conveyor 35 apply material at the same position of the bearing area 1 1 of the continuous conveyor 10.
  • the analysis of the cross sectional area of the maximum by the measuring device 50 results in the conclusion that here two complete lanes are applied at the same position.
  • the continuous conveyors 35 and 37 are moved by the adjustment devices 45 and 47 into the direction of the edge of the continuous conveyor 10 such that they again occupy their original position, wherein again a material bed according to figure 2a is formed.
  • fig. 3a again the same ideal overall profile as in fig. 2a is shown.
  • the measuring device 50 detects such a minimum, then, thus, the connected regulating device will move the positions of the continuous conveyors 34 and 36 into the direction of the middle of the continuous conveyor 10, namely so long, until the ideal profile of the overall bed as in fig. 3a is adjusted again.
  • the measuring device 50 is designed such that the cross sectional area of the overall bed can be calculated easily and automatically, and even also in the case, when the actual profile differs from the ideal profile.
  • the coupling with an analyzing unit which especially in the case, when the actual profile differs from the ideal profile, identifies at which position the deviation is present and how large it is.
  • the analyzing unit in the case of faults as in fig. 2b and 2d would detect that here a whole lane is absent or that two lanes have been applied at the same position.
  • the analyzing unit would transmit the signal to the movement driving units 45 and 47 to move with 17.5 % of the transport speed of the continuous conveyor 10 into the direction which is necessary each.
  • the analyzing unit detects small faults as in fig.
  • the material (Mi with the width Bi) is applied via a first continuous conveyor 210 onto a second continuous conveyor 220.
  • the first continuous conveyor 210 has the design of a conveyor belt with at least one driving unit.
  • the continuous conveyor 220 consists of a conveyor belt 221 and a roller screen 222 which has the advantage that so particles which are too small and/or too large can be removed before further process steps are conducted.
  • the conveyor belt 221 and the roller screen 222 have separate driving units.
  • the continuous conveyor 21 0 transports material into or onto the discharge device 230. In the simplest case, this can be achieved by a design of the discharge device as a discharge pulley, around which the belt of the conveyor belt is passed with an entwining angle of ca. 1 80°.
  • the discharge device 230 is moved in two running directions, namely over the width of the material bed M 2 on the continuous conveyor 220 (B 2 ), wherein the width has to be understood as orthogonal with respect to the movement direction. Ideally, thus, the discharge device 230 moves from one side of the continuous conveyor 220 back to the other side. Here, in at least one running direction it discharges material . Normally, this is the case, when the discharge pulley is moved in the second running direction, thus opposite to the transport direction T? of the first continuous conveyor. This material (M 2 with a width B 2 ) is then further transported on the bearing area of the second continuous conveyor 223 from the second continuous conveyor 220.
  • a measuring device 250 which detects the course of the material flow on the continuous conveyor 220 and/or its bearing area.
  • Such devices may, for example, be ultrasonic or radar probes which are arranged on a beam side by side such that they cover the whole region over the width of the second continuous conveyor.
  • laser systems or simple deflection methods such as for example one or more metal strips which are deflected stronger or not so strong by minima or maxima, which is then detected again, can be used .
  • ultrasonic probes also radar probes could be used.
  • the detection may also be conducted via an optical system, for example a camera, and then analyzed by means of a computerized picture analysis.
  • the transport speed v 2 of the second continuous conveyor 220 which is provided by a control device 240 can also be fine-tuned by a design as a regulating device 240 so that the minima or maxima disappear.
  • Fig. 5 shows the same device in x-z direction.
  • the material Mi is, preferably in a steady-state material stream, transported on the bearing area 21 1 of the first continuous conveyor 210 to the discharge pulley 230.
  • the bearing area 21 1 of the first continuous conveyor 210 is guided in known manner via a first tail pulley 212, a tension pulley 214 with the corresponding tensioning weight 215 and a second tail pulley 213.
  • the discharge device 230 can be moved over the width B 2 of the second continuous conveyor, for example as shown, by means of a hydraulic cylinder 231 .
  • a hydraulic cylinder 231 In an alternative also an electric movement device or an arrangement with two hydraulic cylinders is possible.
  • the material is applied via a first continuous conveyor 310 onto a second continuous conveyor 230 which in turn applies material onto the third continuous conveyor 330 which in turn transfers the material onto the fourth continuous conveyor 340.
  • the first continuous conveyor 310 is designed as a conveyor belt with at least one driving unit.
  • the second continuous conveyor 320 is also designed as a conveyor belt.
  • the third continuous conveyor 330 is designed as a roller screen which is connected with the advantage that so particles which are too small and/or too large can be removed before conducting further process steps.
  • the fourth continuous conveyor 340 is designed as a traveling grate plant. Similarly, however, any design of the continuous conveyor according to the continuous conveyors which are mentioned in the introduction of the description is conceivable.
  • the continuous conveyor 310 transports material into or onto the discharge device 316.
  • this can be achieved by a design of the discharge device as a discharge pulley which redirects the conveyor belt of the first continuous conveyor 310, wherein the discharge device 316 can be moved over the width B 2 and so is moved over the discharge region 60 of the bearing area 321 of the second continuous conveyor 320 so that the material falls down from the discharge device 316 and is distributed over the whole width B 2 of the second continuous conveyor 320.
  • the design of the discharge device 316 is such that it accumulates the whole material being transported by the first continuous conveyor 310 and transfers it onto the second continuous conveyor 320, but in discontinuous form.
  • the discharge device 316 is moved in two running directions, namely over the width B 2 of the material bed M 2 of the continuous conveyor 320, wherein the width has to be understood in an orthogonal direction with respect to the transport direction T 2 of the second continuous conveyor. Ideally, thus, the discharge device 1 6 moves from one side of the continuous conveyor 320 back to the other side. Here, in at least one direction it discharges material. This material is then further transported by the continuous conveyor 320.
  • a measuring device 351 which detects the form and the course of the material flow on the first continuous conveyor 310 and/or its bearing area.
  • a device may, for example, be ultrasonic probes which are arranged on a beam side by side such that they cover the whole region over the width of the first continuous conveyor.
  • laser systems with movable mirrors or simple deflection methods such as for example one or more metal strips which are deflected stronger or not so strong by minima or maxima, which is then detected again, e.g. by means of an electric rotary potentiometer, are conceivable.
  • a second measuring device 352 above the second continuous conveyor 320.
  • the transport speed v 2 of the second continuous conveyor 320 being adjusted by a controlling or regulating device 370 can also be regulated by it, when it is characterized by a design as a regulating device 370 with corresponding control unit, so that the minima or maxima disappear.
  • a third measuring device 353 above the third continuous conveyor.
  • a fourth measuring device 354 is arranged above the fourth continuous conveyor, especially preferably at a position directly after the application of the material.
  • the profile of the material bed below this fourth measuring device is the most important controlled process variable. This profile should not only be kept constant in the course of time by the regulating device 370, but it should be brought, as far as possible, into line with a desired profile.
  • the fourth continuous conveyor 340 a design of the continuous conveyor is shown which, for example, is formed of plates or grate wagons and thus comprises the segments R. Such a design is possible in the case of any of the four continuous conveyors 310, 320, 330 and 340.
  • the continuous conveyor 340 comprises side segments S for limiting its bearing area which are exemplarily depicted for one segment R. Also this is a conceivable design for any one of the four continuous conveyors 310, 320, 330 and 340.
  • Fig. 7 shows the same device in x-z direction.
  • the material Mi is transported, preferably in a steady-state material stream on the bearing area 31 1 of the first continuous conveyor 310 to the discharge pulley 316.
  • the bearing area 31 1 is guided in known manner via a first tail pulley 312, a tension pulley 314 with the corresponding tensioning weight 315 and a second tail pulley 313.
  • the discharge device 316 can be moved over the width B 2 of the material bed
  • the second continuous conveyor 320 has the design of a conveyor belt comprising carrying run 323 and return run 324.
  • V movement direction 210 first continuous conveyor

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Abstract

Procédé et un dispositif pour l'alimentation uniforme d'un convoyeur continu. La présente invention concerne un procédé d'alimentation d'un convoyeur continu en matériau granulaire, selon lequel au moins deux dispositifs de chargement sont déplacés l'un vers l'autre de sorte que, grâce à chaque dispositif de chargement, une voie continue du matériau soit formée sur une zone porteuse du convoyeur continu. Ces voies sont parallèles l'une à l'autre et se chevauchent de sorte qu'un seul lit de matériau soit formé sur la surface porteuse qui, dans une section transversale orthogonale à la surface porteuse, présente la forme d'un trapèze. Les côtés parallèles du trapèze sont parallèles à la surface porteuse.
PCT/EP2017/075347 2016-10-07 2017-10-05 Procédé et dispositif pour l'alimentation uniforme d'un convoyeur continu Ceased WO2018065521A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
UAA201903910A UA125521C2 (uk) 2016-10-07 2017-10-05 Спосіб рівномірного подавання на безперервний конвеєр
EA201990705A EA036991B1 (ru) 2016-10-07 2017-10-05 Способ равномерной загрузки непрерывного конвейера
CA3039114A CA3039114A1 (fr) 2016-10-07 2017-10-05 Procede et dispositif pour l'alimentation uniforme d'un convoyeur continu
BR112019006630-6A BR112019006630B1 (pt) 2016-10-07 2017-10-05 Método para alimentar um transportador contínuo com material granular
CN201780064033.4A CN109843759B (zh) 2016-10-07 2017-10-05 用于为连续传送器均匀供料的方法和装置
MX2019003782A MX2019003782A (es) 2016-10-07 2017-10-05 Método y dispositivo para alimentar de manera uniforme un transportador continuo.

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE102016119107.8 2016-10-07
DE102016119044.6A DE102016119044A1 (de) 2016-10-07 2016-10-07 Verfahren und Vorrichtung zur gleichmäßigen Beschickung eines Stetigförderers
DE102016119044.6 2016-10-07
DE102016119086.1 2016-10-07
DE102016119086.1A DE102016119086A1 (de) 2016-10-07 2016-10-07 Verfahren und Vorrichtung zur Beschickung eines zweiten Stetigförderers durch einen ersten Stetigförderer
DE102016119107.8A DE102016119107A1 (de) 2016-10-07 2016-10-07 Verfahren und Vorrichtung zur Beschickung eines zweiten Stetigförderers durch einen ersten Stetigförderer

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CA (1) CA3039114A1 (fr)
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DE102016119086A1 (de) 2016-10-07 2018-04-12 Outotec (Finland) Oy Verfahren und Vorrichtung zur Beschickung eines zweiten Stetigförderers durch einen ersten Stetigförderer
TWI721872B (zh) * 2020-04-23 2021-03-11 德律科技股份有限公司 適用於具有輸送帶的自動化機台的自動控制系統及方法
CN115092633A (zh) * 2022-06-27 2022-09-23 宝武集团鄂城钢铁有限公司 提升机定位检测控制方法及提升机定位系统
CN120607119A (zh) * 2025-08-12 2025-09-09 中储粮成都储藏研究院有限公司 一种粮食装仓布料方法及系统

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CN112264373B (zh) * 2020-09-30 2022-08-02 云南白药集团文山七花有限责任公司 一种三七自动加工生产线

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DE102016119107A1 (de) 2016-10-07 2018-04-12 Outotec (Finland) Oy Verfahren und Vorrichtung zur Beschickung eines zweiten Stetigförderers durch einen ersten Stetigförderer
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CN120607119A (zh) * 2025-08-12 2025-09-09 中储粮成都储藏研究院有限公司 一种粮食装仓布料方法及系统
CN120607119B (zh) * 2025-08-12 2025-10-10 中储粮成都储藏研究院有限公司 一种粮食装仓布料方法及系统

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CA3039114A1 (fr) 2018-04-12
BR112019006630A2 (pt) 2019-07-02
CN109843759B (zh) 2020-12-22
UA125521C2 (uk) 2022-04-13
MX2019003782A (es) 2019-06-24
BR112019006630A8 (pt) 2023-04-11
CN109843759A (zh) 2019-06-04

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