CN101507942B - Detachable double-layer self-return screen of large-size autogenous mill - Google Patents

Detachable double-layer self-return screen of large-size autogenous mill Download PDF

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Publication number
CN101507942B
CN101507942B CN2009100644313A CN200910064431A CN101507942B CN 101507942 B CN101507942 B CN 101507942B CN 2009100644313 A CN2009100644313 A CN 2009100644313A CN 200910064431 A CN200910064431 A CN 200910064431A CN 101507942 B CN101507942 B CN 101507942B
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China
Prior art keywords
screen
shaft screen
internal layer
shaft
mill
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Expired - Fee Related
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CN2009100644313A
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Chinese (zh)
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CN101507942A (en
Inventor
赵晓红
王成伟
姬建刚
喻晓
王淑慧
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CITIC Heavy Industries Co Ltd
Luoyang Mining Machinery and Engineering Design Institute Co Ltd
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CITIC Heavy Industries Co Ltd
Luoyang Mining Machinery and Engineering Design Institute Co Ltd
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Priority to CN2009100644313A priority Critical patent/CN101507942B/en
Publication of CN101507942A publication Critical patent/CN101507942A/en
Application granted granted Critical
Publication of CN101507942B publication Critical patent/CN101507942B/en
Expired - Fee Related legal-status Critical Current
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Abstract

The invention provides a detachable double-layer self reversal screen for a large-sized autogenous mill. Due to the rotation of the mill driving the rotation of a self reversal screen, the pulp overflows from a material discharging end of a drum(1) of the mill and enter an inner layer drum screen through a rubber channel plate(2) and a material discharging bushing(4) of a hollow shaft; the pulp, of which the size is less than 15mm, penetrates the inner layer drum screen and enters an outer layer drum screen, and the pulp, of which the size is less than 2mm, penetrates the outer layer drum screen and enters the next working procedure; the big-particle materials which are not screened in the inner and the outer layer drum screens enter a material returned cylinder(5) through a material returning machine under the action of spiral thrust, and under the reversely spiral action of the material returned cylinder(5), the big-particle materials are returned back to the drum and crushed to generate the secondary pulp, and the secondary pulp enters the inner and the outer layer drum screens again, and the pulp, of which the size is less than 2mm, enters the next working procedure. The detachable double-layer self reversal screen has the advantages of high screening efficiency of the mill, simple structure, convenient change of the screen, easy operation, short time of screen change, low labor intensity, little equipment investment, low cost and good generality.

Description

A kind of detachable double-layer self-return screen of large-size autogenous mill
Technical field
The invention belongs to the large-sized grinder technical field, refer more particularly to a kind of detachable double-layer self-return screen of large-size autogenous mill.
Background technology
The severe problem that the industry of mine, countries in the world faces reduces producing cost exactly.Because the growth of energy expenditure, the mine grade descends, and reducing construction investment and producing cost is an important topic.Replace three sections traditional disintegrating machines with large-size autogenous mill, it is big to have the ratio of reduction, one-pass finished, and have the selectivity milling action, it is few to cross the pulverizing ore particle, and mass transport is convenient, technological process be can simplify simultaneously greatly, construction investment and operating cost reduced, improve output and quality, series of advantages such as the mechanization that the production process utilized arranged and automation, metal mine uses more and more widely abroad.Also progressively began utilization at home in recent years.
Self-return screen is as a kind of high-effective classifying equipment, extensive use in the autogenous tumbling mill grinding operation.Along with the increasing of autogenous tumbling mill specification, how the treating capacity of grinding machine provides grind grading efficient strengthening, and more and more seems important.Grinding machine in the past adopts the integral barrel sieve at discharge end the ore deposit oar to be sieved mostly, and the screen cloth of drum sieve adopts steel bar to be welded more, stopping up or damage the back at screen cloth just must change whole drum sieve, whole drum sieve is changed pretty troublesome, not only maintenance duration is long, labour intensity is big, and causes very big waste.In addition, the individual layer shaft screen can only be accomplished elementary screening to material, and next procedure also need have screening plant, the ore deposit oar is further sieved, and the large granular materials after the screening also needs Special Equipment to carry back grinding mill barrel to pulverize once more.Detachable double-layer self-return screen has not only improved the screening efficiency of grinding machine effectively in the successful Application of large-scale grinding attachment, has saved cost, reduces labour intensity, and has prolonged the service life of shaft screen.
Summary of the invention
Be the problem that to change whole drum sieve after solving screen cloth and stopping up or damage, and improve grind grading efficient, the invention provides a kind of detachable double-layer self-return screen of large-size autogenous mill.This double-layer self-return screen can improve the screening efficiency of grinding machine.Have automatic discharge, screening function, can guarantee to avoid larger particles to overflow.
The screen cloth of self-return screen is changed flexible, simple to operate.
For achieving the above object, the present invention has adopted following technical scheme:
The method for sieving of described a kind of detachable double-layer self-return screen of large-size autogenous mill, rotating the drive self-return screen by grinding machine rotates, the ore deposit oar overflows from the grinding mill barrel discharge end, discharging lining by rubber frid, quill shaft enters the internal layer shaft screen, see through the internal layer shaft screen less than the ore deposit oar of 15mm and enter outer shaft screen, see through outer shaft screen less than the ore deposit oar of 2mm and enter next procedure; The internal layer of every layer of shaft screen all has spiral, shaft screen rotation, and material is promoted forward by spiral, in the process of advancing, is sized out less than the ore deposit oar of sieve aperture; In internal layer shaft screen and outer shaft screen and the large granular materials that is not sized out under the spiral thrust operation through material returning device, enter the feed back cylinder, under the effect of feed back cylinder backpitch, return in the cylindrical shell, participate in the broken secondary ore deposit oar that generates once more, once more by internal layer shaft screen, outer shaft screen, make material enter next procedure, improved the screening efficiency of grinding machine less than the ore deposit oar of 2mm.
Implement a kind of detachable double-layer self-return screen of large-size autogenous mill of said method, be installed between cylindrical shell discharge end and the feed back cylinder, comprise: internal layer shaft screen, outer shaft screen and screen bed base, the internal layer shaft screen is connected by screen bed base with on every side outer shaft screen, the internal layer shaft screen is communicated with the discharging lining cavity of quill shaft with cavity one end that the feed back cylinder outer wall constitutes, and the other end is communicated with material returning device; The internal layer shaft screen is communicated with material returning device with the cavity that outer shaft screen constitutes.
Described a kind of detachable double-layer self-return screen of large-size autogenous mill, internal layer shaft screen are the steel bar sieve, and the slit is 15mm, also can be the band steel screen cloth.
Described a kind of detachable double-layer self-return screen of large-size autogenous mill, outer shaft screen are designed to several removable screen cloth pieces, and the slit is the 2mm screen cloth, and material is designed to stainless steel mesh.
Because adopt aforesaid technical scheme, the present invention has following superiority:
This a kind of detachable double-layer self-return screen of large-size autogenous mill can guarantee to avoid larger particles to overflow.Have automatic discharge, screening function, the following ore deposit of 2mm oar enters next process by double-deck screen cloth, and larger particles is got back to by hurricane band and carried out fragmentation in the grinding mill barrel once more.Double-layer self-return screen has improved the screening efficiency of grinding machine effectively.The outer screen of self-return screen is detachable stainless steel sift web frame, makes the replacing of self-return screen screen cloth flexible, dismounting maintenance is easy, simple to operate, improved screening efficiency, has prolonged screen cloth service life.
Its characteristics are as follows:
1, screening efficiency height;
2, minimizing equipment drops into; Cost reduces;
3, screen cloth is detachable, when which piece screen cloth damages or stops up, just changes which piece, avoids changing whole self-return screen because of screen cloth local damage or obstruction, reduces cost; Simple, convenient, versatility is good.
4, screen mesh size is little, have universal, convenient processing;
5, mesh structure is simple, changes flexiblely, and easy operating shortens and to change the time, has reduced labour intensity, raises the efficiency.
Description of drawings
Fig. 1 is the detachable double-layer self-return screen of large-size autogenous mill structural representation;
Among the figure: 1-grinding mill barrel 2-rubber frid 3-discharging quill shaft 4-discharging lining 5-feed back cylinder 6-steel bar sieve 7-screen bed base 8-stainless steel mesh 9-material returning device
The specific embodiment
As shown in Figure 1: the present invention is a kind of detachable double-layer self-return screen of large-size autogenous mill.Be installed between cylindrical shell discharge end and the feed back cylinder, its structure is made up of feed back cylinder 5, internal layer shaft screen, outer shaft screen, screen bed base 7 and material returning device 9.The internal layer shaft screen is connected by screen bed base with on every side outer shaft screen, and the internal layer shaft screen is communicated with the discharging lining cavity of quill shaft with cavity one end that the feed back cylinder outer wall constitutes, and the other end is communicated with material returning device; The internal layer shaft screen is communicated with material returning device with the cavity that outer shaft screen constitutes.The internal layer shaft screen is a steel bar sieve 6, and the internal layer shaft screen also can use the slit to be 15mm band steel screen cloth.Outer shaft screen is designed to several removable screen cloth pieces, and material is designed to stainless steel.Be that each removable screen cloth piece employing slit is the removable stainless steel mesh 8 of 2mm; When which piece screen cloth damages or stops up, just change any piece, simple, convenient, versatility is good.
A kind of method for sieving of detachable double-layer self-return screen of large-size autogenous mill, be to rotate by grinding machine to drive the self-return screen rotation, the ore deposit oar overflows from the grinding mill barrel discharge end, discharging lining 4 by rubber frid 2, quill shaft enters the internal layer shaft screen, see through the internal layer shaft screen less than the ore deposit oar of 15mm and enter outer shaft screen, see through outer shaft screen less than the ore deposit oar of 2mm and enter next procedure; The internal layer of every layer of shaft screen all has spiral, shaft screen rotation, and material is promoted forward by spiral, in the process of advancing, is sized out less than the ore deposit oar of sieve aperture.In internal layer shaft screen and outer shaft screen, and the large granular materials that is not sized out process material returning device under the spiral thrust operation, enter the feed back cylinder, under the 5 backpitch effects of feed back cylinder, return in the cylindrical shell, participate in the broken secondary ore deposit oar that generates once more, by internal layer shaft screen, outer shaft screen, make material enter next procedure once more, improved the screening efficiency of grinding machine less than the ore deposit oar of 2mm.
During work, material is by from mutually bump and tumble the mill stripping and make the material pulverizing in grinding mill barrel 1 in the autogenous tumbling mill.Crushing rear material enters rubber frid 2 through the filtration of the grate of cylindrical shell discharge end, through the discharging lining 4 in the discharging quill shaft 3, the nexine screen cloth chamber that enters self-return screen is that steel bar sieves 6 inner chambers, material advances to the right under the effect of steel bar screen cloth inside spin thrust, material less than sieve aperture in the process of advancing sees through the sieve chamber that the band steel screen cloth enters outer stainless steel mesh 8, advance along with the screw in the stainless steel mesh chamber is right front, material less than 2mm enters next procedure through stainless steel mesh, shown in arrow among the figure.See through of the promotion of the large granular materials of screen cloth in the stainless steel mesh and reach in the steel bar sieve by spiral, enter material returning device 9 and enter feed back cylinder 5 then, the spiral of feed back cylinder is opposite with the spiral of screen cloth, rotation along with grinding machine, material in the material returning device is promoted by spiral, enters grinding mill barrel once more and carries out fragmentation again.Outer stainless steel mesh is designed to several detachable combination of screens and forms, every screen cloth uses bolt on the shaft screen frame, like this, and because of the degree of wear difference of material to the screen cloth zones of different, when stainless steel mesh damages, do not need whole shaft screen is changed, only which piece screen cloth is damaged or stops up, just change any piece, simple, convenient, versatility is good, has improved efficient, has reduced cost.

Claims (2)

1. the method for sieving of a detachable double-layer self-return screen of large-size autogenous mill, it is characterized in that: rotate by grinding machine and drive the self-return screen rotation, the ore deposit oar overflows from grinding mill barrel (1) discharge end, discharging lining (4) by rubber frid (2), quill shaft enters the internal layer shaft screen, see through the internal layer shaft screen less than the ore deposit oar of 15mm and enter outer shaft screen, see through outer shaft screen less than the ore deposit oar of 2mm and enter next procedure; The internal layer of every layer of shaft screen all has spiral, shaft screen rotation, and material is promoted forward by spiral, in the process of advancing, is sized out less than the ore deposit oar of sieve aperture; In internal layer shaft screen and outer shaft screen and the large granular materials that is not sized out under the spiral thrust operation through material returning device, enter feed back cylinder (5), under feed back cylinder (5) backpitch effect, return in the cylindrical shell, participate in the broken secondary ore deposit oar that generates once more, once more by internal layer shaft screen, outer shaft screen, make material enter next procedure, improved the screening efficiency of grinding machine less than the ore deposit oar of 2mm.
2. implement the described a kind of detachable double-layer self-return screen of large-size autogenous mill of claim 1, it is characterized in that: be installed between cylindrical shell discharge end and the feed back cylinder (5), comprise: internal layer shaft screen, outer shaft screen and screen bed base (7), the internal layer shaft screen is connected by screen bed base (7) with on every side outer shaft screen, the internal layer shaft screen is communicated with discharging lining (4) cavity of quill shaft with cavity one end that feed back cylinder (5) outer wall constitutes, and the other end is communicated with material returning device (9); The internal layer shaft screen is communicated with material returning device with the cavity that outer shaft screen constitutes; Described internal layer shaft screen is a steel bar sieve (6), and the slit is 15mm, or is adopted as the band steel screen cloth; Outer shaft screen is designed to several removable screen cloth pieces, and the slit is the 2mm screen cloth, and material is designed to stainless steel mesh (8).
CN2009100644313A 2009-03-12 2009-03-12 Detachable double-layer self-return screen of large-size autogenous mill Expired - Fee Related CN101507942B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103861711B (en) * 2014-03-31 2015-11-18 铜陵有色金属集团股份有限公司 The grinding process of semi-autogenous mill
CN107638915B (en) * 2017-10-23 2022-11-15 中冶北方(大连)工程技术有限公司 Full-automatic circulation system for ball mill ore spitting
CN112775151B (en) * 2020-12-25 2022-09-23 济南恒誉环保科技股份有限公司 Cracking or pyrolysis process for waste high-molecular polymer and organic hazardous waste containing large solid impurities
CN112844648B (en) * 2021-01-07 2022-07-15 南昌矿机集团股份有限公司 Rod mill with material returning mechanism
CN113600271A (en) * 2021-06-23 2021-11-05 合肥佳安建材有限公司 Gangue raw material processing apparatus is used in gangue brick production
CN113786983B (en) * 2021-09-17 2022-09-30 仁新实业发展(信阳)有限公司 Blockage clearing device and method for ore screening machine

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Inventor after: Zhao Xiaohong

Inventor after: Wang Chengwei

Inventor after: Ji Jiangang

Inventor after: Yu Xiao

Inventor after: Wang Shuhui

Inventor before: Zhao Xiaohong

Inventor before: Wang Chengwei

Inventor before: Ji Jiangang

Inventor before: Yu Xiao

Inventor before: Wang Shuhui

CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110330

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CF01 Termination of patent right due to non-payment of annual fee