US3357689A - Apparatus for feeding solid materials into a rotary kiln - Google Patents

Apparatus for feeding solid materials into a rotary kiln Download PDF

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Publication number
US3357689A
US3357689A US440203A US44020365A US3357689A US 3357689 A US3357689 A US 3357689A US 440203 A US440203 A US 440203A US 44020365 A US44020365 A US 44020365A US 3357689 A US3357689 A US 3357689A
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United States
Prior art keywords
kiln
scoop
opening
conduit
solid material
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Expired - Lifetime
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US440203A
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English (en)
Inventor
Arnesen Arne Georg
Basen Toralv
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Elektrokemisk AS
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Elektrokemisk AS
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories or equipment specially adapted for rotary-drum furnaces
    • F27B7/32—Arrangement of devices for charging
    • F27B7/3205—Charging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories or equipment specially adapted for rotary-drum furnaces
    • F27B7/32—Arrangement of devices for charging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories or equipment specially adapted for rotary-drum furnaces
    • F27B7/32—Arrangement of devices for charging
    • F27B7/3205—Charging
    • F27B2007/3247—Charging through a lateral opening in the drum
    • F27B2007/3252—Charging through a lateral opening in the drum with lifting scoops attached to the drum

Definitions

  • the invention relates to an apparatus and method for feeding solid materials into a rotary kiln.
  • the scoop feeders which have heretofore been used in connection with rotary kilns have usually been quite open, whereby considerable amounts of air have been sucked into the kiln.
  • the quantity of air which enters the kiln in this way cannot be controlled, and the result is that the combustion Within the kiln also cannot be controlled, so that the combustion may easily become excessive and the desired prereduction of the oxides not obtained.
  • the atmosphere in the kiln may even become oxidizing, which again results in an increased consumption of reducing agent.
  • Excessive combustion Will also heat the charge above its softening temperature so that it will sinter and stick to the kiln walls.
  • the heat developed by these torches may easily cause local superheating of the charge in the kiln and of the kiln lining, which may result in sintering and clogging of the charge in the kiln and other operational disturbances.
  • the feed conduits may even become completely clogged up so that the supply of raw material through them is stopped.
  • the life of the conduits is also considerably reduced because of the strong heating and the contact with the burning carbon.
  • the angular release position is selected with due regard for the kiln speed of rotation so that excavated solid material in the scoop will drop through the feed conduit very rapidly from the moment of release. In this way, the dwell time of the solid material in the feed conduit is so markedly reduced that there is little if any opportunity for the material to become overheated, or stuck or baked to the conduit wall or ignited Within the conduit.
  • each feed conduit is provided with a flap which can pivot into and out of a closing position in relation to an opening leading from the scoop into the feed conduit.
  • a pair of cams are arranged to intercept cam followers, connected to the pivot rod of the flap, at predetermined angular positions whereby the flap is first moved out of the closing position to permit excavated solid material in the scoop to move into the feed conduit and then the flap is moved back into the closing position whereby air or other gas is excluded from entering the feed conduit.
  • the feed conduits can be maintained closed for the major part of each complete revolution of the kiln, the conduits being controllably opened and closed only for that brief interval of time required to permit excavated solid material to empty from the scoop and drop through the feed conduit into the kiln.
  • a second opening leading into each feed conduit is provided adjacent the opening leading from the scoop into the conduit.
  • a common, pivotable flap is so arranged as to pivot into alternate closing positions wherein first the scoop opening is closed and the second opening left open, and then the second opening is closed and the scoop opening left open.
  • a separate control such as a butterfly or slide valve is also provided to variably reduce the amount of gas flow through the second opening.
  • the scoop opening can be opened for a limited time to rapidly feed excavated solid material through the associated feed conduit into the kiln.
  • controlled amounts of air can be injected through the fully or partially open second opening while the scoop opening remains shut. This will provide a cooling elTect upon the flap and feed conduit to further prevent sticking or baking of solid material upon the interior of the conduit wall.
  • combustion and temperatures within the kiln can be more readily controlled with such injection of controlled amounts of air.
  • both flaps are provided for the scoop opening and for the second opening leading into the feed conduit. In this way, both openings can be maintained closed over a limited interval during each revolution of the kiln. This makes for still more control over the amount of air or other gas that is permitted to enter the kiln through the feed conduits and provides the additional advantage that the injection of air or gas through the feed conduit, after delivery of excavated solid material therethrough, can be delayed for any desired time or even eliminated before the scoop again excavates a portion of solid material with start of the next revolution.
  • FIG. 1 is a side elevation of a rotary kiln provided with apparatus illustrated diagrammatically for feeding solid material thereto in accordance with the invention
  • FIG. 2 is a section taken along line 2 -2 of FIG. 1;
  • FIG. 3 is a close-up view of a portion of FIG. 2, with parts broken away to illustrate additional details of structure;
  • FIG. 4 is a view similar to FIG. 3 showing a further stage of revolution for the kiln of FIG. 3;
  • FIG. 5 is a modification of the scoop-feed conduit structure of FIGS. l-4;
  • FIG. 6 is another modification of the same.
  • FIG. 7 is still another modification of the same.
  • a rotary kiln is there generally indicated by reference numeral 10.
  • the kiln is supported and revolved upon conventional stands 12 in known manner.
  • a hopper 14 and associated conduit 16 are provided for transporting charge into the feed end of the kiln which is also enclosed within plenum 18 in which oil gas can be collected and withdrawn through conduit 20.
  • a discharge device 22 which is conventional (as is the structure described for the feed end) and delivers treated solid material to the outlet pipe 25.
  • a bin or container 24 Positioned adjacent the exterior of the kiln is a bin or container 24, supported upon stand 26.
  • a hopper 28 and associated conduit 30 are arranged to supply the bin 24 with particulate solid material, for example solid carbonaceous reducing agent, which is desired to be fed into the kiln.
  • At least one feed conduit 32 extends through the kiln wall. As will be noted in FIG. 1, the inner ends of the feed conduits 32 are staggered out of radial alignment and extended slightly past each other whereby solid material dropping out of any one conduit cannot enter any other conduit and instead is controlled to fall to the bottom of the kiln.
  • each feed conduit 32 outside the kiln 10 is joined to an intermediate member 34 which in turn is joined to the scoop 36.
  • the scoop 36 is provided with an opening 38 which leads into the feed conduit 32 and through which excavated solid material in the scoop may be permitted to enter the feed conduit (FIG. 3).
  • the intermediate member 34 is provided with a second opening 40 which is located adjacent and approximately at right angles to the scoop opening 38, and faces the direction of revolution of the kiln which, as indicated by the arrow, is counter clockwise (FIG. 4).
  • a short conduit 41 projects out from the second opening 40 in alignment therewith.
  • a flap 42 is supported on a pivot rod 44 and arranged to pivot into and out of two alternate closing positions, one of which closes the scoop opening 38 and leaves the second opening 40 open (FIG. 4) and the other of which closes the second opening and leaves the scoop opening open (FIG. 3).
  • the ends of three rigid arms 46, 48 and 50 are fixedly attached so that the rigid arms may pivot with the pivot rod.
  • the opposite ends of the arms 46, 48 and 50 are spaced apart from each other and, preferably, the spaced ends of the outer two arms 46 and 50 form with the pivot rod a generally triangular configuration.
  • the centrally located rigid arm 48 supports, at its spaced end, one end of a spring 52 the opposite end of which is attached to a fixed support 55 on the exterior of the kiln 10.
  • cam followers 46A and 50A The spaced ends of the outer two rigid arms 46 and 50 are provided with cam followers 46A and 50A.
  • a pair of earns 54 and 56 are supported by conventional means (not shown) in a manner such that the inclined surfaces of the cams will intercept the paths of travel of the cam followers 46A and 50A and thereby engage said followers during kiln revolution.
  • the cam followers 46A and 50A of the feed conduit 32 spaced axially further away from the cams 54 and 56 (FIG. 1) are supported upon a pivot rod 44 which is suitably lengthened so that the followers will be engaged by the same cam surfaces in the same way as will be the followers 46A and 50A of the axially closer feed conduit 32.
  • each of the flaps 42 will be in the position illustrated in FIG. 4 wherein the scoop opening 38 is closed and the adjacent opening 40 is open. During all or part of this time, controlled amounts of air or other gas can be injected into the kiln 10 through the second opening 40 and the associated feed conduit 32.
  • each scoop 36 passes through the supply of solid particulate material held in the bin 24.
  • the scoop 36 excavates a portion of the solid material which remains therein even though the scoop travels to a position beyond the angle of repose of the material, because the flap 42 is in the closing position with respect to the scoop opening 38.
  • the angle of repose of a solid particulate material is the maximum angle with the horizontal at which the material will retain its position without tending to slide, and it is a distinct feature and advantage of this invention that excavated solid material in the scoops 36 may be carried as much beyond the angle of repose as may be desired before being fed into the kiln 10 from a preselected angular position.
  • the time when excavated solid material in the scoop 36 is permitted to enter feed conduit 32 is determined by the position of the cam first engaged after excavation of solid material, which is cam 54. Considering the direction of kiln revoltuion, the working surface of cam 54 is inclined toward the kiln 10. As a result, the cam follower 46 is pushed toward the kiln as it moves along the working surface of cam 54 and this applies a torque to the pivot rod 44 which in turn begins to pivot the flap 42 out of closing position with respect to the scoop opening 38. Excavated solid material therefore begins to drop from the scoop 36 into the feed conduit 32.
  • the scoop opening at a second selected angular position is closed by flap 42 and the second opening 40 is simultaneously opened so that air or other gas may be injected therethrough into the kiln.
  • This is done by contact of the cam follower 50A with the working surface of cam 56 which, in the direction of kiln revolution, is inclined away from the kiln.-As a result, the cam 56 pushes follower 50A away from the kiln which causes the flap 42 to move back to the position illustrated in FIG. 4 under the same spring action described above for the opposite movement of the flap in connection with FIG. 3.
  • the spring 52 alternately applies its energy to the flap 42 as torques of opposite direction.
  • the torque direction reverses each time the flap 42 pivots between its two described positions whereby the spring 52 assists the pivoting motion and also maintains the flap locked under tension in each of its two positions.
  • the time interval over which the scoop opening 38 remains open during each revolution of the kiln is determined by the angular distance between earns 54 and 56. This distance is correlated with the speed of revolution to insure that all or the excavated solid material in each scoop 36 will be emptied out of the scoop.
  • an angular distance corresponding to an arc of from about to about 30 measured from the kiln axis of revolution will be satisfactory, although other distances can also be used.
  • the cam 54 is positioned closer to a vertical plane passing through the kiln axis of revolution, the action of gravity will be increased upon the excavated solid material in the scoop so that less time will be required for completely emptying the scoop of the solid material.
  • FIG. 5 illustrates a modification of the apparatus shown in FIGS. 14 wherein the short conduit 41 leading to the second opening 40 is equipped with means for reducing the amount of gas flow through the opening 40 independently of the flap 42.
  • the specific means illustrated in the drawing is a butterfly type valve 58, although obviously other known means can be employed.
  • FIG. 6 illustrates a further modification wherein the second opening 40 of FIGS. 1-4 is eliminated so that the scoop 36 and opening 38 constitute the only access to the feed conduit 32.
  • the kiln 19 will be completely sealed except for the time that the scoop opening 38 is opened to allow excavated solid material in the scoop to enter the feed conduit 32.
  • this will be found of advantage and it is of course possible to feed air or other gas into the kiln with the modification of FIG. 6 by means of separate pipes or other supply means.
  • FIG. 7 illustrates a further modification in which the scoop opening 38 and the second opening 40 are provided with separate pivotable flaps 42A which are moved into and out of their respective closing positions under the same spring action described above in connection with FIGS. 14.
  • This particular modification may be found of advantage in certain applications because air or other gas can be fed to the kiln for any desired interval of kiln revolution while the scoop opening is closed and, dur'ng the remainder of each revolution of the kiln, the kiln may be completely sealed.
  • Apparatus for feeding solid material into a rotary kiln which comprises means for holding a supply of the solid material adjacent the exterior of the kiln, at least one conduit extending through the kiln wall and having a scoop at its end outside the kiln, said scoop having an opening through wh ch solid material may pass into said conduit and being arranged to excavate a portion of said supply of solid material during each revolution of the kiln, a flap mounted adjacent said scoop opening and being pivotable into a first position which closes said scoop opening and into a second position which opens scoop opening, means for pivoting said flap alternately between said first and second positions, said pivoting means including a tensioned spring the energy of which is alternately applied to said flap as torques having opposite directions, there being a reversal of said torque direction each time said flap pivots from one to the other of said first and second positions so that said spring assists the pivoting motions of said flap and also maintains said flap locked under tension in either one of said first and second positions, whereby excava
  • Apparatus for feeding solid material into a rotary kiln which comprises means for holding a supply of the solid material adjacent the exterior of the kiln, at least one conduit extending through the kiln wall and having a scoop at its end outside the kiln, said scoop having an opening through which solid material may pass into said conduit and being arranged to excavate a portion of said supply of said material during each revolution of the kiln, a second opening adjacent said scoop opening and also leading into said condu t, means for alternately closing said scoop opening while leaving said second opening open and for closing said second opening while leaving said scoop opening open, and means for moving said closure means into and out of the alternate closing positions, whereby excavated solid material may be carried to a selected angular position and then ad mitted into said conduit for delivery into the kiln.
  • Apparatus as in claim 4 which includes a plurality of said conduits extending from the kiln wall to the kiln axis of revolution, each said conduit being positioned out of radial alignment with any other of said conduits, whereby solid material conveyed through any one conduit cannot enter any other conduit.
  • closure means comprises a flap supported on a pivot rod located between said scoop and second openings, said flap being pivotable about said pivot rod from one alternate closing position to the other alternate closing position.
  • Apparatus as in claim 4 which includes separate means independent of said closure means for varying the amount of gas flow through said second opening.
  • one end of said pivot rod is fixedly attache-d to one end each of three rigid arms, the opposite ends of said arms being spaced apart from each other and the spaced ends of the outer two of said arms forming with the pivot rod a generally triangular configuration, a coil spring attached at one end to a fixed support on the kiln and at the other end to the spaced end of the rigid arm located between said two outer arms, a cam follower provided at the spaced end of each of said two outer arms, and wherein said closure moving means comprises a first cam positioned to engage one of said cam followers and thereby pivot said flap into one alternate closing position, and a second cam positioned to engage the second of said cam followers and thereby pivot said flap into the second alternate closing position.
  • Apparatus for feeding solid material into a rotary kiln which comprises means for holding a supply of the solid material adjacent the exterior of the kiln, at least one conduit extending through the kiln wall and having a scoop at its end outside the kiln, said scoop having an opening through which solid material may pass into said conduit and being arranged to excavate a portion of said angular position and then admitted into said conduit for.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Furnace Details (AREA)
US440203A 1964-03-17 1965-03-16 Apparatus for feeding solid materials into a rotary kiln Expired - Lifetime US3357689A (en)

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Application Number Priority Date Filing Date Title
NO15246964 1964-03-17

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US3357689A true US3357689A (en) 1967-12-12

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US (1) US3357689A (fr)
BR (1) BR6567914D0 (fr)
CH (1) CH467984A (fr)
ES (1) ES310626A1 (fr)
FI (1) FI43743C (fr)
FR (1) FR1428397A (fr)
GB (1) GB1071933A (fr)
OA (1) OA01553A (fr)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4034968A (en) * 1974-07-12 1977-07-12 Mendenhall Robert Lamar Asphalt mixing apparatus
US4090622A (en) * 1975-09-22 1978-05-23 Sunbeam Equipment Corporation Rotary retort furnace
US4930965A (en) * 1988-11-23 1990-06-05 Cadence Chemical Resources, Inc. Apparatus for charging solid fuel to rotary kilns
US4974529A (en) * 1988-11-23 1990-12-04 Cadence Chemical Resources, Inc. Method for energy recovery from containerized hazardous waste
US5058513A (en) * 1988-11-23 1991-10-22 Benoit Michael R Energy recovery from containerized waste
US5078594A (en) * 1991-01-28 1992-01-07 Cadence Chemical Resources, Inc. Device for charging combustible solids to rotary kilns
US5083516A (en) * 1988-11-23 1992-01-28 Cadence Chemical Resources, Inc. Processed wastes as supplemental fuel for modified cement films
US5122189A (en) * 1990-04-13 1992-06-16 Hoke M. Garrett Manufacture of cement clinker in long rotary kilns by the addition of volatile fuels components directly into the calcining zone of the rotary kiln
US5156676A (en) * 1990-04-13 1992-10-20 Hoke M. Garrett Manufacture of cement clinker in long rotary kilns by the addition of volatile fuel elements directly into the calcining zone of the rotary kiln
US5224433A (en) * 1988-11-23 1993-07-06 Cadence Chemical Resources, Inc. Waste fuel delivery to long kilns
US5226774A (en) * 1991-01-28 1993-07-13 Cadence Chemical Resources, Inc. Device for charging combustible solids to rotary kilns
US5257586A (en) * 1992-02-26 1993-11-02 Davenport Ricky W Method and apparatus for feeding to a rotary device
US5339751A (en) * 1992-09-01 1994-08-23 Ash Grove Cement Company Apparatus and method for charging combustible solids into a rotary kiln
US5470146A (en) * 1986-06-30 1995-11-28 Standard Havens, Inc. Countercurrent drum mixer asphalt plant
US5549058A (en) * 1995-04-10 1996-08-27 Cadence Environmental Energy, Inc. Method and apparatus for charging a bulk material supplemental fuel into a long cement kiln
US6231288B1 (en) 1999-12-31 2001-05-15 Thomas R. Largent Conveyor head and lift for feeding tires into a rotating kiln
US6234091B1 (en) 1999-11-23 2001-05-22 Thomas R. Largent Feed chute apparatus for gravity feeding tires and other materials in to a rotating kiln
US6676407B2 (en) 1999-12-31 2004-01-13 Thomas R. Largent Warp resistant access door assembly for a high temperature combustion chamber
US20090305180A1 (en) * 2005-11-04 2009-12-10 Polysius Ag Plant and method for the production of cement clinker
CN103591806A (zh) * 2013-07-19 2014-02-19 浙江环立环保科技有限公司 水泥窑协同处置中一种机械弹射物料装置及其进窑方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US644057A (en) * 1899-02-20 1900-02-27 Gates Iron Works Rotary kiln.
US1415990A (en) * 1919-12-08 1922-05-16 American Metal Co Ltd Rotary kiln
US1830002A (en) * 1929-03-27 1931-11-03 Harry R Struthers Apparatus for roasting material

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US644057A (en) * 1899-02-20 1900-02-27 Gates Iron Works Rotary kiln.
US1415990A (en) * 1919-12-08 1922-05-16 American Metal Co Ltd Rotary kiln
US1830002A (en) * 1929-03-27 1931-11-03 Harry R Struthers Apparatus for roasting material

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4034968A (en) * 1974-07-12 1977-07-12 Mendenhall Robert Lamar Asphalt mixing apparatus
US4090622A (en) * 1975-09-22 1978-05-23 Sunbeam Equipment Corporation Rotary retort furnace
US5470146A (en) * 1986-06-30 1995-11-28 Standard Havens, Inc. Countercurrent drum mixer asphalt plant
US5058513A (en) * 1988-11-23 1991-10-22 Benoit Michael R Energy recovery from containerized waste
US5724899A (en) * 1988-11-23 1998-03-10 Cadence Environmental Energy, Inc. Modified cement kiln for burning combustible solid waste as supplemental fuel
US5083516A (en) * 1988-11-23 1992-01-28 Cadence Chemical Resources, Inc. Processed wastes as supplemental fuel for modified cement films
US5224433A (en) * 1988-11-23 1993-07-06 Cadence Chemical Resources, Inc. Waste fuel delivery to long kilns
US4974529A (en) * 1988-11-23 1990-12-04 Cadence Chemical Resources, Inc. Method for energy recovery from containerized hazardous waste
US5377603A (en) * 1988-11-23 1995-01-03 Cadence Environmental Energy, Inc. Burning of blended waste-derived supplemental fuel for improved manufacture of cement
US4930965A (en) * 1988-11-23 1990-06-05 Cadence Chemical Resources, Inc. Apparatus for charging solid fuel to rotary kilns
US6050203A (en) * 1988-11-23 2000-04-18 Cadence Enviromental Energy, Inc. Method for use of solid waste as fuel for cement manufacture
US5122189A (en) * 1990-04-13 1992-06-16 Hoke M. Garrett Manufacture of cement clinker in long rotary kilns by the addition of volatile fuels components directly into the calcining zone of the rotary kiln
US5156676A (en) * 1990-04-13 1992-10-20 Hoke M. Garrett Manufacture of cement clinker in long rotary kilns by the addition of volatile fuel elements directly into the calcining zone of the rotary kiln
US5078594A (en) * 1991-01-28 1992-01-07 Cadence Chemical Resources, Inc. Device for charging combustible solids to rotary kilns
US5226774A (en) * 1991-01-28 1993-07-13 Cadence Chemical Resources, Inc. Device for charging combustible solids to rotary kilns
US5257586A (en) * 1992-02-26 1993-11-02 Davenport Ricky W Method and apparatus for feeding to a rotary device
US5339751A (en) * 1992-09-01 1994-08-23 Ash Grove Cement Company Apparatus and method for charging combustible solids into a rotary kiln
US5549058A (en) * 1995-04-10 1996-08-27 Cadence Environmental Energy, Inc. Method and apparatus for charging a bulk material supplemental fuel into a long cement kiln
US6234091B1 (en) 1999-11-23 2001-05-22 Thomas R. Largent Feed chute apparatus for gravity feeding tires and other materials in to a rotating kiln
US6994035B2 (en) 1999-11-23 2006-02-07 Largent Thomas R Feed chute apparatus for gravity feeding tires and other materials into a rotating kiln
US6231288B1 (en) 1999-12-31 2001-05-15 Thomas R. Largent Conveyor head and lift for feeding tires into a rotating kiln
US6676407B2 (en) 1999-12-31 2004-01-13 Thomas R. Largent Warp resistant access door assembly for a high temperature combustion chamber
US6735906B1 (en) 1999-12-31 2004-05-18 Thomas R. Largent Warp resistant access door assembly for a high temperature combustion chamber
US20090305180A1 (en) * 2005-11-04 2009-12-10 Polysius Ag Plant and method for the production of cement clinker
US9709331B2 (en) * 2005-11-04 2017-07-18 Thyssenkrupp Polysius Aktiengesellschaft Plant and method for the production of cement clinker
CN103591806A (zh) * 2013-07-19 2014-02-19 浙江环立环保科技有限公司 水泥窑协同处置中一种机械弹射物料装置及其进窑方法
CN103591806B (zh) * 2013-07-19 2015-07-29 浙江环立环保科技有限公司 水泥窑协同处置中一种机械弹射物料装置及其进窑方法

Also Published As

Publication number Publication date
OA01553A (fr) 1969-07-21
FR1428397A (fr) 1966-02-11
FI43743C (fi) 1971-06-10
GB1071933A (en) 1967-06-14
CH467984A (de) 1969-01-31
ES310626A1 (es) 1965-06-01
FI43743B (fr) 1971-03-01
BR6567914D0 (pt) 1973-02-22

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