EP0219036A2 - Broyeur à passage annulaire - Google Patents

Broyeur à passage annulaire Download PDF

Info

Publication number
EP0219036A2
EP0219036A2 EP86113847A EP86113847A EP0219036A2 EP 0219036 A2 EP0219036 A2 EP 0219036A2 EP 86113847 A EP86113847 A EP 86113847A EP 86113847 A EP86113847 A EP 86113847A EP 0219036 A2 EP0219036 A2 EP 0219036A2
Authority
EP
European Patent Office
Prior art keywords
grinding
inner body
grinding container
annular gap
container
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.)
Granted
Application number
EP86113847A
Other languages
German (de)
English (en)
Other versions
EP0219036A3 (en
EP0219036B2 (fr
EP0219036B1 (fr
Inventor
Karl-Heinz Hoffmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Brigitte Hedwig Herta Erdmute Hoffmann Te Rommersk
Original Assignee
Hoffmann Brigitte Hedwig Herta Erdmute
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6283438&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0219036(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Hoffmann Brigitte Hedwig Herta Erdmute filed Critical Hoffmann Brigitte Hedwig Herta Erdmute
Publication of EP0219036A2 publication Critical patent/EP0219036A2/fr
Publication of EP0219036A3 publication Critical patent/EP0219036A3/de
Application granted granted Critical
Publication of EP0219036B1 publication Critical patent/EP0219036B1/fr
Publication of EP0219036B2 publication Critical patent/EP0219036B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/16—Mills in which a fixed container houses stirring means tumbling the charge
    • B02C17/166—Mills in which a fixed container houses stirring means tumbling the charge of the annular gap type

Definitions

  • the invention relates to an annular gap mill for continuous very fine comminution, in particular of mineral hard materials, with an outer grinding container in which a rotationally symmetrical inner body is arranged, the outer surface of which limits a grinding gap with the inner surface of the grinding container.
  • Mineral hard materials such as corundum, zirconium dioxide, aluminum oxide, silicon carbide and similar substances, have so far been mainly crushed in ball mills with iron balls. This requires considerable dwell times of the material in the grinding chamber, and all parts that come into contact with the ground material and the iron balls are subject to very heavy wear. In addition, the grinding process is associated with annoying noise. Another disadvantage of such ball mills is that the abrasion of the iron balls gets into the regrind and has to be washed out in chemical washing processes in a complicated and expensive manner.
  • Annular gap mills of the type mentioned at the outset with a cylindrical or a frustoconical, straight surface, rotatable inner rotor sol Although they are an improvement over conventional ball mills, they are not very suitable for the fine grinding of mineral hard materials and are only economical for the grinding of much softer materials, such as chalk and the like. This is primarily due to the behavior of grinding balls or grinding beads in the grinding gap.
  • the grinding beads which are pumped into the grinding gap from below, together with the regrind (slurry), first move through the pressure of the feed pump, with which the grinding stock suspension is pressed into the annular gap mill, and through the rotational movement of the rotor in the grinding gap, but they sink Decrease in pump pressure due to gravity and do not allow a grinding process to take place in the upper part of the grinding gap. If you want to prevent this, the feed pump pressure or the regrind flow must be increased so that the grinding beads are also held in the upper part of the grinding gap; then there is the danger that the grinding beads are discharged together with the regrind, which in turn reduces the grinding performance.
  • the vane pump wheel is subject to heavy wear from grinding beads and regrind. Sieves are sometimes used to hold back the grinding beads in the grinding gap, but these can hinder and even prevent the regrind discharge if they are clogged with regrind and grinding beads.
  • Another known annular gap mill (DE-OS 28 11 899) has a conical grinding container, the inner surface of which defines a grinding chamber with a conical rotating displacer.
  • return channels for the grinding beads are arranged obliquely outwards.
  • the grinding beads show the unfavorable behavior described, and despite the circulation of the grinding beads, the utilization of the entire height of both grinding gap parts for the grinding process is practically not achieved here either.
  • the grinding beads located in the inner downward grinding gap part namely follow the grinding material flow in the outlet direction instead of counteracting it, so that less work is done in this part of the grinding gap than in the other grinding gap part, in which gravity may cause a certain lengthening of the residence time.
  • the grinding container can be driven to rotate about the central axis.
  • this measure does not bring any advantages in terms of optimizing the degree of comminution, but rather does the opposite, because the grinding beads only pass through the grinding gap all the faster are driven downwards on the inside and upwards on the outside, so that the shortening of their dwell time in the grinding gap reduces the grinding capacity.
  • This known annular gap mill is otherwise only suitable for wet grinding and cannot treat dry material at all.
  • the older European patent application 85 110 652.6 which is considered to be the state of the art, provides a certain remedy in that the rotatable inner rotor and the stationary grinding container have a frustoconical, straight-shaped lower part and an oppositely tapered frustoconical, straight-shaped upper part, which have a grinding gap in the area of the lower parts and limit an outlet gap in the area of the upper parts, the lower end of the largest diameter of which opens into an annular chamber at the open upper end of the largest diameter of the grinding gap.
  • the annular chamber prevents a reduction in the quantity of grinding pearls or the grinding effect by absorbing a predetermined excess of grinding pearls, which there forms a floating barrier layer which retains the active grinding pearls in the grinding gap.
  • the entire height of the grinding gap is used for the active grinding process of the grinding beads because hydrodynamics and centrifugal force prevent the grinding beads from sinking into the grinding gap, the height of the grinding gap is limited to the lower part of the rotor and grinding container and this results in an undesirable result Performance loss.
  • the aforementioned and advantageous hydrodynamic effect occurs only with a wet grinding, but not with a dry grinding. However, this is often desirable, particularly with mineral hard materials, since their finely ground powders are to be processed further in dry form and therefore constitute wet grinding (with subsequent drying and deagglomeration) energetically represents a detour.
  • the invention is therefore based on the object of improving an annular gap mill of the type mentioned at the outset so that, by increasing the output in the grinding gap, it enables an economically and technically optimal fine comminution of hard mineral materials in the wet and in the dry state.
  • rotationally symmetrical bodies of the form described above provide a relative optimum with regard to the sum of all requirements that must be made of the operation of an annular gap mill: high degree of ball filling in the grinding gap, high grinding material conveyance through the ball packing, high power absorption of the balls from the drive source, therefore high shear performance of the balls in qualitative (fineness of grinding) and quantitative (quantity of regrind), no discharge of the grinding balls by the regrind flow; and these requirements apply to both wet and dry grinding.
  • the mill according to the invention meets these requirements, and the character of the mill can be determined by the choice of drive:
  • the inner body (as a rotor) must be driven; it is formed like this then a hydrodynamic effect occurs in the grinding gap, which, as a result of the upper and lower areas of the inner body and grinding container, which taper in opposite directions, and the convex curvature counteracts at least one of the areas of gravity of the grinding beads and the grinding material and prevents their sinking in the grinding gap while the Centrifugal force in the area of the largest diameter prevents the grinding beads from being removed with the regrind. Without sieves, there is a separation of regrind and grinding beads. Since the rate of ascent of the material to be ground in the grinding gap is dependent on the speed of the inner body on the one hand, its control can influence the grinding effect.
  • the dwell time of the slip in the grinding gap depends on the grinding material conveying speed and can be regulated by controlling the feed pump, so that the grinding effect can also be changed in the desired manner by influencing this parameter.
  • the regrind slowly moves upwards in the direction of the discharge due to the rotatingly driven grinding bead belt, and the slurry grain size is narrow due to the long dwell time.
  • the grinding container must be driven (as an external rotor); the grinding beads and grinding material particles located in the grinding gap are caught by the centrifugal force which, as a result of the upper and lower regions of the inner body and grinding container, which taper in opposite directions, and counteracts the convex curvature of at least one of the areas, the gravity of the grinding balls and the grinding material particles and on the one hand prevents their sinking in the grinding gap, but on the other hand also prevents the grinding beads from being discharged through the grinding material particles.
  • dry grinding basically gives the same options for controlling the grinding process as for wet grinding. Instead of a slurry feed pump, an air flow feed can be provided.
  • the convex curvature of an area of the mill cross-section tapering in opposite directions can be supplemented by a second convexly curved area or a conical straight area.
  • a convex lower region can also advantageously be combined with an at least partially concave upper region. The concavity of the upper region of the cross section helps to prevent the grinding beads from being driven upwards.
  • the outer surface of the inner body can advantageously be spherically curved in a closed line. Accordingly, the inner surface of the grinding container is spherically curved and there is a spherical shell-shaped grinding gap, at the upper end of which the outlet for the ground material is preferably provided beyond the inner body. The material to be ground is advantageously fed into the lower apex of the grinding gap.
  • the formation of the inner body outer surface and the inner surface of the grinding container as an ellipsoid or hyperbolic body and the like can also be realized.
  • the shape of the outer surface of the inner body and the inner surface of the grinding container need not be identical; for example, an elliptic Combine the inner body or a slightly flattened spherical inner body in the equatorial zone with the largest diameter with an absolutely spherical inner surface of a grinding container.
  • This difference in the radii of the curvatures of the outer surface of the inner body and the inner surface of the grinding container, in particular in the equator zone favors the restraint of the grinding beads in the equator zone and intensifies their grinding work due to the large forces prevailing here.
  • the central axis of the inner body can be inclined relative to the central axis of the grinding container. Since the most massive particles, i.e. As a rule, the grinding beads move into an orbit that runs at right angles to the central axis of the driven mill part (inner body or grinding container), this means that, depending on the inclination of the inner body or grinding container, he outlet for the ground material to the highest or one lower point of the grinding gap can be relocated. This distance of the material outlet to the most labor-intensive equator zone of the driven mill part also contributes to preventing the discharge of grinding beads.
  • the inner body or the grinding container is expediently slidably mounted to change the grinding gap width.
  • the displacement takes place, in particular, transversely to the central axis of the inner body and leads to the fact that it stands eccentrically in the grinding container and that one side of the grinding gap is narrower than the opposite side of the same.
  • both the inner body and the grinding container are rotatably mounted and are provided with a rotary drive.
  • the direction of rotation of the rotating parts can be opposite or in the same direction.
  • the rotating parts rotate in the same direction, they have a speed difference or speed difference, so that the required relative movement occurs.
  • the rotation of the inner body on the inside of the grinding gap and the grinding container on the outside of the grinding gap lead to the fact that the grinding beads are rotated in the grinding gap from two sides and are activated for work. In this case, the entire thickness of the grinding bead layer in the grinding gap takes part in the grinding work.
  • the opposite rotation of the two mill parts causes higher shear forces of the grinding beads, and in particular in the zone with the largest diameter, the output can be doubled compared to the embodiment with only one driven mill part.
  • the behavior of the grinding beads in the mill changes insofar as the separation of the grinding beads and thus the prevention of their exit from the mill becomes even more effective.
  • the simultaneous drive of the inner body and grinding container has another significant advantage:
  • the mill can be used for wet or dry grinding without any further modifications.
  • the inner body is driven. If you leave the meal the container is resting, the normal grinding effect occurs; if it is driven in opposite directions, the grinding effect is increased considerably.
  • the grinding container is driven. If the ground material is to be ground dry (as a powder), the grinding container is driven. If the inner body is left to rest, the normal grinding performance is established; if it is driven in opposite directions, the grinding capacity is increased.
  • the performance of the mill can also be increased during oxyacetylene grinding by narrowing the grinding gap on one side.
  • an automatic interval switch for the inner body and the grinding container is provided, both of which can initially drive with the same direction of rotation, when the maximum speed is reached, the inner body or the grinding container can be moved relative to one another until a one-sided grinding gap of approximately 1 mm is reached, and at the same time, one of the rotating parts switches to counter rotation, then the moved part return to its starting position with the same direction of rotation and then have these processes repeated.
  • the inner surface of the grinding container and the outer surface of the inner body have fine-rough surfaces. This means that they must not be particularly smooth, but should not be particularly rough.
  • the fine roughness can be achieved by a suitable coating of the surfaces, which serves as a corrosion and wear protection layer.
  • the inner body can be ventilated on the inside.
  • the grinding container can be surrounded by a cooling liquid jacket or air-cooled.
  • annular gap mill 12 is suspended from a support plate 11 for wet or dry grinding.
  • the annular gap mill 12 essentially consists of a mainly spherical, driven hollow inner body 13 with an upwardly rotating axis of rotation in the form of a hollow shaft 14 and an outer grinding container 15, the inner surface of which is spherical and which has its central axis coaxial with the hollow shaft 14 of the inner body 13 is independently rotatable.
  • the inner body 13 is flattened at 17 by removing a spherical cap section.
  • the lower, narrow grinding gap section ends in an enlarged orifice 25 of the passage 18 of the hollow shaft 14, which is created by the flattening 17 of the inner body 13, while the upper grinding gap section is open to a ring of radial, circumferentially oblique outlet openings 26, which are located in a cylindrical drive housing 27 , which is fixedly connected to the grinding container 15 in order to set it in rotation when a belt inserted in a groove 32 transmits driving force to the drive housing 27.
  • the outlet openings 26 are directed radially and obliquely in the same direction and their inner end near the axis lies opposite a cylindrical projection 28 of the inner body 13, which is covered by a plate 29 and reinforces the exit of the hollow shaft 14 from the inner body 13.
  • the hollow shaft 14 is surrounded by a bush 30 at a distance 30a, the upper end of which protrudes through the support plate 11 and is clamped to it by means of a secured nut 41 and which has on its outer circumference inner rings of a double ball bearing 31 which has the drive housing 27 of the grinding container 15 rotatable. Since the drive housing 27 rotates with the grinding container 15, the outlet openings 26 also rotate and spin the finely ground material conveyed upward from the grinding gap 23 radially outward into a box 33, from which it is directed downwards ten drain collecting channel 34 drains into a collecting container. The centrifugal force retains the grinding beads in the equatorial zone 24, so that the discharged product is free of grinding beads.
  • the inner body 13, including its cylindrical extension 28 and the passage 18 of the hollow shaft 14, is provided with a corrosion and wear protection layer 35, which advantageously has a fine, rough surface.
  • the inner surface of the grinding container 15 is also provided with such a fine-rough lining 36, which extends into the region of the outlet openings 26 on the inner surface of the drive housing 27.
  • the grinding container 15 is divided centrally in the horizontal plane.
  • the upper and the lower half of the grinding container 15 are screwed together via matching flanges 37, 38.
  • an opening 39 is formed in the region of the orifice chamber 25, which can be closed with the aid of a screw cap 40 and the outlet e.g. of cleaning fluid.
  • the annular gap mill shown in FIG. 1 can work with an inner body 13 arranged centrally in the grinding container 15. However, for finely grinding certain hard materials, it may be more favorable to eccentrically center the inner body 13 in the grinding container 15, namely coaxially or preferably to move transversely to its hollow shaft 14.
  • the transverse displacement of the inner body 13 is possible in the region of the oversize 30a of the bore of the bushing 30 with respect to the outer diameter of the hollow shaft 14 and the adjustment device 22 mentioned, which is illustrated in a top view in FIG. 2, is used to carry it out.
  • the adjusting device 22 consists essentially of a two-track carriage 42 with a dovetail profile, which is connected via a holder 43 to the bearing housing 21 of the ball bearing 16, which is screwed through bushings between an annular shoulder 44 on the hollow shaft 14 and one screwed onto an external thread on the hollow shaft 14 secured nut 45 is clamped.
  • the two parallel side parts of the carriage 42 can each be displaced in a parallel guide 46 which is firmly connected to the support plate 11.
  • transverse threaded bolts 47 (FIG. 2) which engage through the parallel guide 46 on the oblique profile of each side part of the carriage 42.
  • the displacement of the inner body 13 transversely to its axis of rotation with the aid of the adjusting device 22 leads to the perpendicular central axis of the inner body 13 being displaced transversely to the central axis of the grinding container 15 by the piece a indicated in FIG. 2, as a result of which the grinding gap 23 on one side receives a constriction 23a and has a widening 23b on the opposite side.
  • the ground material introduced with the grinding beads through the upper coaxial opening 18a of the passage 18 into the mouth space 25 and thus into the grinding gap 23 in the constriction 23a, which in practice has a width of approx.
  • FIG. 3 shows an annular gap mill for dry grinding in the diagram, the basic principle of which corresponds essentially to that of the annular gap mill according to FIG. 1.
  • an indicated cylindrical bush 52 is fastened, on which a grinding container 54 with an exactly spherical inner surface is rotatably suspended via a double ball bearing 53.
  • the grinding container 54 is fixedly connected to a drive housing 55 which has a circumferential groove 65 for a drive belt.
  • the drive housing 55 is provided with a ring of radial outlet openings 56 which open into an annular suction channel 57 with a tangential outlet 58 through which the dry, finely ground material is drawn off in the direction of the arrow.
  • the grinding container 54 is divided horizontally so that an approximately spherical inner body 58 can be inserted into the cavity from below after its opening.
  • the inner body 58 has a coaxial passage 59 which merges into a coaxial hollow shaft 60 which has an inlet 59a at its upper end for the material to be ground and grinding beads.
  • the hollow shaft 60 can be connected via a drive disk 49 at its upper end to a drive which rotates the inner body 58 in the direction of the arrow drawn in the region of a double ball bearing 61. This arrow points in a direction opposite to the indicated direction of rotation of the grinding container 54.
  • An adjusting device 62 enables a radial displacement of the inner body 58 with respect to the interior of the grinding container 54 such that the inner body 58 is offset eccentrically to the vertical central axis of the grinding container 54 in the manner shown and the grinding gap 63 is narrower in the drawing on the left (63a) is as right (63b).
  • the adjusting device 62 can have a spindle drive 64 of a conventional type, which allows the inner body 58 to be adjusted with millimeter precision, if necessary during the rotation of the parts, i.e. during the annular gap mill operation.
  • the design of the inner body 58 and the grinding container 54 with the components belonging to them essentially corresponds to the embodiment according to FIG. 1.
  • FIG. 4 differs from the examples of FIGS. 1 and 3, inter alia, in that the grinding container 74 is non-rotatably connected to a support plate 70 of a stand 71 and thus only the inner body 73 mounted in a double ball bearing 72 rotates.
  • the use of only one rotating part is sufficient in this annular gap mill because, as the drain collecting channel 75 and the box 77 surrounding the radial outlet openings 76 show, it is preferably intended for wet grinding, ie for processing slip.
  • the inner body 73 has an approximate pear shape and is approximately spherically convexly curved in the lower region 73a, while its upper region 73b can be conical or even slightly concave.
  • the upper region 73b of the inner body 73 is continued by a shaft 79 which has no passage.
  • the end of the shaft 79 projecting through the support plate 70 is rotatably mounted in a ball bearing 72.
  • a drive pulley 83 at the upper end of the shaft 79 rotates the inner body 73 in the direction of the arrow.
  • the inner surface of the grinding container 74 also has an approximately spherical shape in the lower region and is essentially adapted to the course of the tapering of the inner body 73 in this zone in the upper region.
  • a grinding gap 81 remains between the two parts.
  • a widening of the grinding gap 81 can be provided in the equatorial region, which increases the centrifugal force in this zone and improves the retention of the grinding beads by the outlet openings 76.
  • a concave curvature which may be provided, of the upper area of inner body 73 and grinding container 74 is used.
  • a passage 78 for feeding in slurry and grinding beads is located centrally in the lower apex zone of grinding gap 81. Passage 78 is open to an orifice chamber 80 , which arises between a flattened portion of the inner body 73 and the spherical inner surface of the grinding container 74.
  • the vertical inner body 73 is radially displaceable with respect to the central axis of the grinding container 74.
  • An adjusting device 82 is used for this purpose, which can correspond to the adjusting device 62 of the example according to FIG. 3.
  • the example according to FIG. 5 differs from the previous examples essentially in that an approximately spherical inner body 90 with a vertical hollow shaft 91 is combined with an at least internally spherical grinding container 92, the central axis 93 of which is at an angle ⁇ to the vertical central axis of the hollow shaft 91 is inclined.
  • the grinding container 92 is rotatably mounted on an inclined foot 94 via a double ball bearing 95, the rotary drive being transmitted to it by a belt in a groove 96 in a drive housing 97.
  • the rotation of the grinding container 92 with a spherical inner surface should take place in the direction of the arrow assigned to the grinding container 92.
  • a zy Lindner neck portion 98 of the grinding container 92 contains a ring of radial outlet openings 99 which convey into a suction channel 100 with a tangential outlet 101.
  • the inclined neck portion 98 has a relatively large clear diameter, which is closed by a stationary inclined cover 102, which is suspended from a support plate 103 of a stand 104.
  • a mechanical seal 105 is arranged between the underside of the cover 102 and the end face of the neck part 98.
  • the inner body 90 is rotated in the direction of the arrow in the opposite direction to the grinding container 92 via a drive belt engaging a drive pulley 106 at the upper end of the hollow shaft 91.
  • the hollow shaft 91 is mounted in a double ball bearing 107, and the double ball bearing 107 is located in a bearing housing 108, which is connected to an adjusting device 109, which enables an eccentric adjustment of the inner body 90 transversely to its axis of rotation in the spherical cavity of the inclined grinding container 92 in this way that one side of the grinding gap 110 becomes narrower than the opposite side.
  • the inclination of the grinding container 92 by the angle ⁇ to the vertical has the consequence that the outlet openings 99, which lie in a plane parallel to the transverse plane AA of the grinding container 92, have lower and higher portions.
  • FIG. 6 shows an annular gap mill in which the axis of rotation of an inner body 111 also forms an angle ⁇ with the center axis of a rotatable grinding container 112.
  • the grinding container 112 is aligned perpendicularly and the inner body 111 is inclined.
  • Grinding container 112 and inner body 110 rotate in double ball bearings 113 and 114, respectively.
  • Their drives are transmitted by motors which engage belts on a drive pulley 115 at the upper end of a hollow shaft 129 of the inner body 111 and on a drive housing 116 on the grinding container 112.
  • the grinding container 112 is mounted vertically on a straight base 117, while the inner body 111 is arranged obliquely in an inclined bearing housing 118, which is attached to a support plate 119 of a stand 120.
  • a ring of radial outlet openings 121 surrounds a cylindrical neck part 122 of the grinding container 112 and through these outlet openings 121 the finely ground slurry obtained by the wet grinding process passes into a drain collecting channel 123 which leads to a collecting container.
  • the prevention of the discharge of grinding beads from the grinding gap 124 is improved because the outlet openings 121 are in relation to one another divide the effective equatorial zone BB of the inner body 111, which is at an angle to the vertical, and in which the greatest centrifugal forces prevail, into a lower left-hand portion and a higher right-hand portion, which is practically not reached by the grinding beads.
  • FIG. 7 shows an annular gap mill in which a bearing housing 132 for the double ball bearing 133 of a vertical hollow shaft 134 of an inner body 135 is fastened on a support plate 131 of a stand 130.
  • the inner body 135 has an approximately elliptical shape with a slight flattening 136 in the equatorial zone of the largest diameter.
  • the lower dome of the elliptical inner body 135 is also flattened at 137, so that an opening space 138 is formed between the flat 137 and the curvature of the completely elliptical inner surface of a grinding container 139.
  • the straight passage 140 of the hollow shaft 134 opens into the mouth space 138, through which dry material and milling beads to be milled from above are introduced.
  • the grinding container 139 is fixedly connected to a drive housing 142, which contains a double ball bearing 143 and transmits the drive of a motor to the grinding container 139.
  • the grinding container 139 rotates independently of the inner body 135, the axes of rotation of both rotating parts being arranged coaxially.
  • the finely ground material passes through a ring of radial outlet openings 144 into a suction channel 145.
  • a drive disk 146 at the upper end of the hollow shaft 134 transmits the drive of a motor to the inner body 135.
  • FIGS. 1 to 7 are only examples, the components of which are interchangeable, so that annular gap mills for wet or dry grinding of a wide variety of hard materials are produced, which work with a rotatable or fixed grinding container or inner body and whose grinding gap can be narrowed on one side or evenly dimensioned.
  • the speeds of the inner body and grinding container can be adapted to the material to be ground and can be different or the same, as can the directions of rotation.
  • an automatic interval switch it is possible to have the grinding bowl and the inner body first driven with the same direction of rotation, when the maximum speed is reached, to move the inner body or the grinding bowl relative to each other until a one-sided grinding gap of approx. 1 mm is reached and at the same time to switch the grinding container or the inner body to counter-rotation, then to return the grinding container or the inner body in its starting position with the same direction of rotation and then to repeat these processes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
EP86113847A 1985-10-12 1986-10-07 Broyeur à passage annulaire Expired - Lifetime EP0219036B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3536440A DE3536440C1 (de) 1985-10-12 1985-10-12 Ringspaltmuehle
DE3536440 1985-10-12

Publications (4)

Publication Number Publication Date
EP0219036A2 true EP0219036A2 (fr) 1987-04-22
EP0219036A3 EP0219036A3 (en) 1988-08-03
EP0219036B1 EP0219036B1 (fr) 1990-06-13
EP0219036B2 EP0219036B2 (fr) 1994-11-02

Family

ID=6283438

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86113847A Expired - Lifetime EP0219036B2 (fr) 1985-10-12 1986-10-07 Broyeur à passage annulaire

Country Status (5)

Country Link
US (1) US4735366A (fr)
EP (1) EP0219036B2 (fr)
JP (1) JPS6287255A (fr)
DE (1) DE3536440C1 (fr)
ZA (1) ZA867706B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3838981A1 (de) * 1988-11-18 1990-05-23 Eirich Walter Ruehrwerkskugelmuehle

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5053815A (en) * 1990-04-09 1991-10-01 Eastman Kodak Company Reproduction apparatus having real time statistical process control
ES2030618A6 (es) * 1990-10-31 1992-11-01 Oliver & Battle Sa Molino para triturar y desaglomerar solidos predispersados en liquidos.
US5769339A (en) * 1996-11-22 1998-06-23 Nordberg, Inc. Conical gyratory mill for fine or regrinding
JP4754174B2 (ja) * 2003-03-26 2011-08-24 太平洋セメント株式会社 水素貯蔵体の製造装置および水素貯蔵体の製造方法、ならびに水素貯蔵体
JP4412558B2 (ja) * 2006-07-25 2010-02-10 晃立工業株式会社 粉砕機
MX2010002569A (es) * 2007-09-06 2010-03-31 Lowan Man Pty Ltd Molino pulverizador y metodo de pulverizacion.
US20140311345A1 (en) * 2013-04-18 2014-10-23 James Peter Morrissette Hydration container
BR112015032506B1 (pt) * 2013-07-22 2021-10-05 Imp Technologies Pty Ltd Moinho para triturar material particulado
CN110142107B (zh) * 2019-05-21 2024-03-29 西华大学 一种双层球磨罐
JP7637871B2 (ja) * 2020-11-24 2025-03-03 株式会社ナガオシステム 回転装置および微粒子作製方法
WO2022075465A1 (fr) * 2020-10-09 2022-04-14 三菱マテリアル株式会社 Contenant, dispositif rotatif et procédé de production de particules fines
CN114247688B (zh) * 2021-12-23 2023-03-24 宣城鸿升钙业有限公司 一种超细碳酸钙生产装置及其生产工艺

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2738172A (en) * 1952-11-28 1956-03-13 Nat Dairy Res Lab Inc Apparatus for treatment of products with ultrasonic energy
US3199792A (en) * 1962-07-20 1965-08-10 Jr Robert W Norris Comminuting and dispersing process and apparatus
US4225092A (en) * 1977-11-22 1980-09-30 Microprocess Ltd. Annular grinding mill
DE2811899C2 (de) * 1978-03-18 1984-12-06 Fryma-Maschinen Ag, Rheinfelden Spalt-Kugelmühle
DE3249928C3 (de) * 1982-12-10 1995-06-29 Buehler Ag Geb Rührwerksmühle
DE3431636C1 (de) * 1984-08-29 1985-10-17 Reimbold & Strick GmbH & Co, 5000 Köln Ringspalt-Kugelmuehle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3838981A1 (de) * 1988-11-18 1990-05-23 Eirich Walter Ruehrwerkskugelmuehle
US4998678A (en) * 1988-11-18 1991-03-12 Walter Eirich Agitator ball mill

Also Published As

Publication number Publication date
EP0219036A3 (en) 1988-08-03
JPH0228377B2 (fr) 1990-06-22
JPS6287255A (ja) 1987-04-21
EP0219036B2 (fr) 1994-11-02
DE3536440C1 (de) 1987-03-26
EP0219036B1 (fr) 1990-06-13
ZA867706B (en) 1987-06-24
US4735366A (en) 1988-04-05

Similar Documents

Publication Publication Date Title
EP0219740B1 (fr) Broyeur à billes à passage annulaire
EP0219036B1 (fr) Broyeur à passage annulaire
DE3431636C1 (de) Ringspalt-Kugelmuehle
DE69618431T2 (de) Mechanischer Zerkleinerungsapparat
DE4128074C2 (de) Rührwerkskugelmühle
DE69328944T2 (de) Apparat zur Verarbeitung von körnigem Material
EP0676240A1 (fr) Procédé et dispositif de broyage de matériau avec une granulométrie variable, en particulier broyeur à flux d'air
DE19514794C2 (de) Mahlwerk zur Zerkleinerung von körnigem Material, wie Getreidekorn, Kaffee, Pfeffer, Salz oder Zucker
EP0376001A1 (fr) Broyeur agitateur avec dispositif de séparation dans une cage rotative
EP1534435A1 (fr) Moulin a billes a agitateur
DE3308390C2 (de) Schleifzerkleinerer
DE3844380C1 (en) Agitator mill with separating device in a rotating cage
EP0665059B1 (fr) Broyeur agitateur à billes
EP0171527B1 (fr) Machine de finissage centrifuge
EP0700724B2 (fr) Procédé et appareil pour le broyage continu autogène d'une matière à traiter fluide
AT253337B (de) Vorrichtung zum fortlaufenden Mahlen und Dispergieren von Feststoffen in Flüssigkeiten
EP1027161A1 (fr) Procede et dispositif pour le broyage a l'etat mouille de solides dans des liquides
DE3730597C2 (de) Strahlmühle
DE19834397B4 (de) Rührwerksmühle
EP0410229A1 (fr) Broyeur agitateur pour le microbroyage
DE4234759C2 (de) Rührwerkmühle zur Feinstmahlung
DE19943518A1 (de) Zerkleinerungsmaschine
AT393519B (de) Zerkleinerungs- bzw. mahlelement fuer trommelrefiner
DE4214060C2 (fr)
DE3729317A1 (de) Kontinuierlich arbeitende mahleinrichtung mit integrierter klassiereinrichtung

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): CH FR GB IT LI NL

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): CH FR GB IT LI NL

17P Request for examination filed

Effective date: 19880902

17Q First examination report despatched

Effective date: 19881117

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH FR GB IT LI NL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19900613

Ref country code: FR

Effective date: 19900613

ITF It: translation for a ep patent filed
ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: BUEHLER AG

Effective date: 19901002

NLR1 Nl: opposition has been filed with the epo

Opponent name: BUEHLER AG.

ITTA It: last paid annual fee
RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: HOFFMANN, BRIGITTE HEDWIG HERTA ERDMUTE

RIN2 Information on inventor provided after grant (corrected)

Free format text: HOFFMANN, KARL-HEINZ

REG Reference to a national code

Ref country code: CH

Ref legal event code: PUE

Owner name: BRIGITTE HEDWIG HERTA ERDMUTE HOFFMANN

NLT2 Nl: modifications (of names), taken from the european patent patent bulletin

Owner name: BRIGITTE HEDWIG HERTA ERDMUTE HOFFMANN TE ROMMERSK

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19930907

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19931029

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19931031

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19931229

Year of fee payment: 8

PUAH Patent maintained in amended form

Free format text: ORIGINAL CODE: 0009272

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT MAINTAINED AS AMENDED

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19941031

Ref country code: CH

Effective date: 19941031

27A Patent maintained in amended form

Effective date: 19941102

AK Designated contracting states

Kind code of ref document: B2

Designated state(s): CH FR GB IT LI NL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19941102

REG Reference to a national code

Ref country code: CH

Ref legal event code: AEN

NLR2 Nl: decision of opposition
EN3 Fr: translation not filed ** decision concerning opposition
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 19900613

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20051007

PLAB Opposition data, opponent's data or that of the opponent's representative modified

Free format text: ORIGINAL CODE: 0009299OPPO