CN107469924B - A kind of sieving approach device for surface mining - Google Patents

A kind of sieving approach device for surface mining Download PDF

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Publication number
CN107469924B
CN107469924B CN201710861008.0A CN201710861008A CN107469924B CN 107469924 B CN107469924 B CN 107469924B CN 201710861008 A CN201710861008 A CN 201710861008A CN 107469924 B CN107469924 B CN 107469924B
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China
Prior art keywords
level
screening drum
component
raw coal
broken
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Application number
CN201710861008.0A
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Chinese (zh)
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CN107469924A (en
Inventor
孙丽君
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.)
Mohogou Coal Co., Ltd
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Quanzhou Nuo Li Sen Trade Co Ltd
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Priority to CN201710861008.0A priority Critical patent/CN107469924B/en
Priority to CN201811063775.8A priority patent/CN109126974A/en
Publication of CN107469924A publication Critical patent/CN107469924A/en
Application granted granted Critical
Publication of CN107469924B publication Critical patent/CN107469924B/en
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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
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
    • B02C4/08—Crushing or disintegrating by roller mills with two or more rollers with co-operating corrugated or toothed crushing-rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/02—Feeding devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
    • B02C23/12—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/16—Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B02C4/286—Feeding devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/02—Magnetic separation acting directly on the substance being separated
    • B03C1/30—Combinations with other devices, not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/18—Drum screens
    • B07B1/22—Revolving drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B2201/00—Details applicable to machines for screening using sieves or gratings
    • B07B2201/04—Multiple deck screening devices comprising one or more superimposed screens

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Combined Means For Separation Of Solids (AREA)

Abstract

The invention discloses a kind of sieving approach devices for surface mining, including raw coal conveying assembly, raw coal disruption elements, feed component and sieve classification component；Raw coal disruption elements storage bin and broken stone storehouse；The bottom of storage bin is provided with discharge port；It is provided with feed inlet at the top of broken stone storehouse；It is provided with broken gear in broken stone storehouse；Two broken gears are arranged by gear shaft in broken stone storehouse；Sieve classification component includes level-one screening drum, two level screening drum and three-level screening drum；Level-one screening drum, two level screening drum and three-level screening drum are set gradually from top to bottom, include outer barrel and inner cylinder；Outer barrel is closed structure；The side wall of the inner cylinder is mesh structure；The inner cylinder is also connect with rotary shaft and electric rotating machine；Level-one screening drum is also connect by circulation conveying component with the storage bin.Small investment of the present invention, maintenance rate is low, power consumption is low, production efficiency is high.

Description

A kind of sieving approach device for surface mining
Technical field
The present invention relates to coal mining technology fields, and in particular to a kind of sieving approach device for surface mining.
Background technology
Crushing and screening operation is indispensable technical process in mining processing industry production.Due to material physical property and its Structure it is widely different, for adapt to different material crushing and screenings demand, it is necessary to select different types of crushing and screening to set It is standby.
Invention content
The purpose of the present invention is to provide a kind of sieving approach device for surface mining, small investment, maintenance rate are low, electric Consume that low, production efficiency is high.
In order to solve the above technical problem, the present invention provides following technical solutions：A kind of screening for surface mining is broken Crushing device, the device include raw coal conveying assembly, raw coal disruption elements, feed component and sieve classification component；The raw coal Raw coal is conveyed to raw coal disruption elements after raw coal disruption elements are broken and is fed intake to sieve classification by feed component by conveying assembly Component is sieved；
The raw coal disruption elements include storage bin and broken stone storehouse；The storage bin is taper knot wide at the top and narrow at the bottom Structure；The bottom of the storage bin is provided with discharge port；It is provided with feed inlet at the top of the broken stone storehouse；The discharge port and The feed inlet is connected by transition warehouse；It is provided with broken gear in the broken stone storehouse；Two broken gears pass through gear Axis is arranged in broken stone storehouse；
The sieve classification component includes level-one screening drum, two level screening drum and three-level screening drum；Described Level-one screening drum, two level screening drum and three-level screening drum are set gradually from top to bottom；Level-one screening drum, two level screening Roller and three-level screening drum include outer barrel and inner cylinder；The outer barrel is closed structure；The side wall of the inner cylinder is Mesh structure；Also with rotation axis connection, the rotary shaft drives the inner cylinder by electric rotating machine；The outer barrel and inner cylinder On be both provided with inlet and outlet；The mesh of inner cylinder is successively in level-one screening drum, two level screening drum and three-level screening drum Reduce；
The level-one screening drum is also connect by circulation conveying component with the storage bin.
Further, the raw coal conveying assembly includes that lower horizontal transport platform, inclination transport platform and upper level are defeated Send platform；The discharge end of the upper level transport platform is located at the top entry of storage bin；The lower horizontal transport platform, It tilts and is both provided with permanent-magnetic iron expeller in transport platform and upper level transport platform.
Further, the feed component includes transport carriage, topples over component, transhipment track；The transport carriage Both sides are both provided with 2 transhipment tracks；One end of the transhipment track is arranged in the lower section in the broken stone storehouse, and the other end extends to The top of sieve classification component；The transport carriage, which is arranged, topples in described on component；Described topples over component described in Transport carriage move up and down；It is both provided with limit switch at the top and bottom of the transhipment track；Described topples on component It is provided with switch and hits plate.
Further, the component of toppling over includes the mobile support plate for being used to support transport carriage, shaft and lifting liquid Pressure；The front end of the transport carriage is flexibly connected by shaft with the mobile support plate；The rear end of the transport carriage is logical Raise-lower hydraulic is crossed to connect with the mobile support plate；The cylinder body of raise-lower hydraulic is fixed in the mobile support plate, lifting The piston rod part of hydraulic pressure is provided with sliding block, and the bottom of transport carriage is provided with the sliding slot slided for sliding block, sliding block limit In the sliding slot.
Further, it is provided with guide groove in the transhipment track, rack is provided in the guide groove, it is described Toppling over setting on component, there are four the driving gears engaged with the rack in transhipment track；The driving gear by flat key with Take turns axis connection；The wheel shaft is fixedly connected with the drive motor, the rotation of drive motor drive shaft.
The sieve classification component includes the screening drum of three-level or more, under the mesh of wherein higher level's screening drum is more than The mesh of grade screening drum.
The advantageous effect that is reached of the present invention is：The sieving approach device for surface mining of the present invention includes that raw coal is defeated Sending component, raw coal disruption elements, feed component and sieve classification component；Raw coal is conveyed to raw coal and is crushed group by raw coal conveying assembly Part is fed intake by feed component after raw coal disruption elements are broken and is sieved to sieve classification component；Raw coal carries out before broken Except iron processing, the ferrous contaminants in raw material are effectively removed, follow-up equipment is enable safely and effectively to run；
The sieve classification component of the present invention includes level-one screening drum, two level screening drum and three-level screening drum；It is described Level-one screening drum, two level screening drum and three-level screening drum sieved by centrifugation, screening efficiency is high.Level-one The mesh of inner cylinder is sequentially reduced in screening drum, two level screening drum and three-level screening drum；Different-grain diameter can effectively be sieved Coal ore, improve production efficiency.
Description of the drawings
It, below will be to needed in the embodiment in order to more clearly illustrate the technical solution in the embodiment of the present invention Attached drawing is simply introduced, it should be apparent that, the accompanying drawings in the following description is only some embodiments described in the present invention, for For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings Attached drawing.
Fig. 1 is the structural schematic diagram of the present invention.
Fig. 2 is the structural schematic diagram for toppling over component.
Fig. 3 is the structural schematic diagram for transporting track.
Fig. 4 is the structural schematic diagram of screening drum.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation describes.
As shown in Figs 1-4, it is a kind of sieving approach device for surface mining of the present invention, which includes that raw coal is defeated Sending component 1, raw coal disruption elements 2, feed component and sieve classification component 4；Raw coal is conveyed to by the raw coal conveying assembly 1 Raw coal disruption elements 2 are fed intake by feed component after raw coal disruption elements 2 are broken and are sieved to sieve classification component 4；
The raw coal disruption elements 2 include storage bin 211 and broken stone storehouse 212；The storage bin 211 is wide at the top and narrow at the bottom Pyramidal structure；The bottom of the storage bin 211 is provided with discharge port 213；The top in the broken stone storehouse 212 is provided with charging Mouth 214；The discharge port 213 and the feed inlet 214 are connected by transition warehouse 215；Setting in the broken stone storehouse 212 There is broken gear 216；Two broken gears 216 are arranged by gear shaft 217 in broken stone storehouse 212；
The sieve classification component 4 includes level-one screening drum 41, two level screening drum 42 and three-level screening drum 43； Level-one screening drum 41, two level screening drum 42 and the three-level screening drum 43 is set gradually from top to bottom；Level-one is sieved Roller 41, two level screening drum 42 and three-level screening drum 43 include outer barrel 411 and inner cylinder 412；The outer barrel 411 is envelope The structure closed；The side wall of the inner cylinder 412 is mesh structure；The inner cylinder 412 is also connect with rotary shaft 413, described Rotary shaft 413 is driven by electric rotating machine 414；It is both provided with inlet and outlet on the outer barrel 411 and inner cylinder 412；Level-one is sieved The mesh of inner cylinder 412 is sequentially reduced in point roller 41, two level screening drum 42 and three-level screening drum 43；
The level-one screening drum 41 is also connect by circulation conveying component with the storage bin 211.
Further, the raw coal conveying assembly 1 includes lower horizontal transport platform 11, tilts transport platform 12 and upper water Flat transport platform 13；The discharge end of the upper level transport platform 13 is located at the top entry of storage bin 211；The lower part It is both provided with permanent-magnetic iron expeller in horizontal feed platform 11, inclination transport platform 12 and upper level transport platform 13.
Further, the feed component includes transport carriage 31, topples over component 32, transhipment track 33；The transhipment The both sides of trolley are both provided with 2 transhipment tracks 33；One end of the transhipment track 33 is arranged under the broken stone storehouse 212 Side, the other end extend to the top of sieve classification component 4；The transport carriage 31, which is arranged, topples in described on component 32； The component 32 of toppling over is moved up and down along the transport carriage 31；The top and bottom of the transhipment track 33 are both provided with Limit switch 34；It is described topple over be provided with switch on component 32 and hit plate 35.
Further, the component 32 of toppling over includes mobile support plate 321, the shaft for being used to support transport carriage 31 322 and raise-lower hydraulic 323；The front end of the transport carriage 31 is connected by shaft 322 and 321 activity of mobile support plate It connects；The rear end of the transport carriage 31 is connect by raise-lower hydraulic 323 with the mobile support plate 321；Raise-lower hydraulic 323 Cylinder body is fixed in the mobile support plate 321, and the piston rod part of raise-lower hydraulic 323 is provided with sliding block 324, transport carriage 31 bottom is provided with the sliding slot 325 slided for sliding block 324, and the sliding block 324 is limited in the sliding slot 325.
Further, guide groove 331 is provided in the transhipment track 33, setting is with teeth in the guide groove 331 Item 332, there are four the driving gears 333 engaged with the rack in transhipment track 33 for the setting on component 32 of toppling over；It is described Driving gear 333 connect with wheel shaft 334 by flat key；The wheel shaft 334 is fixedly connected with the drive motor 335, 335 drive shaft 334 of drive motor rotates.
The sieve classification component 4 includes the screening drum of three-level or more, and the mesh of wherein higher level's screening drum is more than The mesh of subordinate's screening drum.
The sieving approach device for surface mining of the present invention includes raw coal conveying assembly, raw coal disruption elements, feed Component and sieve classification component；Raw coal conveying assembly by raw coal be conveyed to raw coal disruption elements after raw coal disruption elements are broken by Feed component feeds intake to be sieved to sieve classification component；Raw coal has carried out handling except iron before broken, effectively removes raw material In ferrous contaminants, so that follow-up equipment is safely and effectively run；
The sieve classification component of the present invention includes level-one screening drum, two level screening drum and three-level screening drum；It is described Level-one screening drum, two level screening drum and three-level screening drum sieved by centrifugation, screening efficiency is high.Level-one The mesh of inner cylinder is sequentially reduced in screening drum, two level screening drum and three-level screening drum；Different-grain diameter can effectively be sieved Coal ore, improve production efficiency.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to the design of the present invention It is defined with range, under the premise of not departing from design concept of the present invention, ordinary engineering and technical personnel is to this hair in this field The all variations and modifications that bright technical solution is made should all fall into protection scope of the present invention, claimed skill of the invention Art content is all documented in technology claim.

Claims (4)

1. a kind of sieving approach device for surface mining, it is characterised in that：The device includes raw coal conveying assembly（1）, it is former Coal disruption elements（2）, feed component and sieve classification component（4）；The raw coal conveying assembly（1）Raw coal is conveyed to raw coal Disruption elements（2）Through raw coal disruption elements（2）It is fed intake by feed component after broken and gives sieve classification component（4）It is sieved；
The raw coal disruption elements（2）Including storage bin（211）With broken stone storehouse（212）；The storage bin（211）For upper width Under narrow pyramidal structure；The storage bin（211）Bottom be provided with discharge port（213）；The broken stone storehouse（212）Top It is provided with feed inlet（214）；The discharge port（213）With the feed inlet（214）Pass through transition warehouse（215）Connection；Institute The broken stone storehouse stated（212）Inside it is provided with broken gear（216）；Two broken gears（216）Pass through gear shaft（217）Setting is broken Shi Cang（212）It is interior；
The sieve classification component（4）Including level-one screening drum（41）, two level screening drum（42）With three-level screening drum （43）；The level-one screening drum（41）, two level screening drum（42）With three-level screening drum（43）It sets successively from top to bottom It sets；Level-one screening drum（41）, two level screening drum（42）With three-level screening drum（43）It include outer barrel（411）And inner cylinder （412）；The outer barrel（411）For closed structure；The inner cylinder（412）Side wall be mesh structure；The inner cylinder （412）Also with rotary shaft（413）Connection, the rotary shaft（413）By electric rotating machine（414）Driving；The outer barrel（411） And inner cylinder（412）On be both provided with inlet and outlet；Level-one screening drum（41）, two level screening drum（42）It sieves and rolls with three-level Cylinder（43）Middle inner cylinder（412）Mesh be sequentially reduced；
The level-one screening drum（41）Also pass through circulation conveying component and the storage bin（211）Connection；
The feed component includes transport carriage（31）, topple over component（32）, transhipment track（33）；The two of the transport carriage Side is both provided with 2 transhipment tracks（33）；The transhipment track（33）One end be arranged in the broken stone storehouse（212）Lower section, The other end extends to sieve classification component（4）Top；The transport carriage（31）It is arranged and topples over component in described（32） On；Described topples over component（32）Along the transport carriage（31）It moves up and down；The transhipment track（33）Top and bottom Portion is both provided with limit switch（34）；Described topples over component（32）On be provided with switch and hit plate（35）.
2. a kind of sieving approach device for surface mining according to claim 1, it is characterised in that：The raw coal Conveying assembly（1）Including lower horizontal transport platform（11）, tilt transport platform（12）With upper level transport platform（13）；Described is upper Portion's horizontal feed platform（13）Discharge end be located at storage bin（211）Top entry at；The lower horizontal transport platform（11）, Tilt transport platform（12）With upper level transport platform（13）On be both provided with permanent-magnetic iron expeller.
3. a kind of sieving approach device for surface mining according to claim 1, it is characterised in that：Described topples over Component（32）Including being used to support transport carriage（31）Mobile support plate（321）, shaft（322）And raise-lower hydraulic（323）；Institute State transport carriage（31）Front end pass through shaft（322）With the mobile support plate（321）Flexible connection；The transport carriage （31）Rear end pass through raise-lower hydraulic（323）With the mobile support plate（321）Connection；Raise-lower hydraulic（323）Cylinder body it is solid It is scheduled on the mobile support plate（321）On, raise-lower hydraulic（323）Piston rod part be provided with sliding block（324）, transport carriage （31）Bottom be provided with for sliding block（324）The sliding slot of sliding（325）, the sliding block（324）It is limited in the sliding slot （325）It is interior.
4. a kind of sieving approach device for surface mining according to claim 1, it is characterised in that：The transhipment Track（33）Inside it is provided with guide groove（331）, the guide groove（331）Inside it is provided with rack（332）, described topples over component （32）There are four upper settings and transhipment track（33）The driving gear of interior rack engagement（333）；The driving gear（333） Pass through flat key and wheel shaft（334）Connection；The wheel shaft（334）With the drive motor（335）It is fixedly connected, drive motor （335）Drive shaft（334）Rotation.
CN201710861008.0A 2017-09-21 2017-09-21 A kind of sieving approach device for surface mining Active CN107469924B (en)

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CN201710861008.0A CN107469924B (en) 2017-09-21 2017-09-21 A kind of sieving approach device for surface mining
CN201811063775.8A CN109126974A (en) 2017-09-21 2017-09-21 A kind of sieving approach device for surface mining

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Publication number Priority date Publication date Assignee Title
PE20210804A1 (en) * 2018-08-13 2021-04-23 Basf Se COMBINATION OF MAGNETIC CARRIER SEPARATION AND AN ADDITIONAL SEPARATION FOR MINERAL PROCESSING
CN110142132B (en) * 2019-04-17 2021-03-16 贵州开磷有限责任公司 Method for screening silicon-calcium collophanite
CN112845014A (en) * 2021-03-10 2021-05-28 重庆工程职业技术学院 Environment-friendly raw coal screening equipment

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CN202823470U (en) * 2012-10-18 2013-03-27 罗锋 Shaft coupling rolling type crashing device
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CN106746420A (en) * 2017-03-08 2017-05-31 仇霞霞 The processing system and its processing method of a kind of oily sludge

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Publication number Priority date Publication date Assignee Title
CN201350447Y (en) * 2008-11-07 2009-11-25 华侨大学 Drum-type screening machine
CN202823470U (en) * 2012-10-18 2013-03-27 罗锋 Shaft coupling rolling type crashing device
CN103316842A (en) * 2013-07-19 2013-09-25 潘华斌 Multistage screening machine
CN204710521U (en) * 2015-06-23 2015-10-21 李俊 A kind of scrap glass circulation reducing mechanism
CN205074041U (en) * 2015-10-21 2016-03-09 合肥华庆建材有限公司 Raw materials grinder of high efficiency gangue sintering hollow brick
CN105366686A (en) * 2015-12-10 2016-03-02 湖北中非膨润土有限公司 Preparation method of bentonite for drilling mud and device thereof
CN106746420A (en) * 2017-03-08 2017-05-31 仇霞霞 The processing system and its processing method of a kind of oily sludge

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