CN204412440U - Adopt dry method dense media separator and the sorting unit of dry method dense medium separation bed - Google Patents

Abstract

The utility model proposes the dry method dense media separator and sorting unit that adopt dry method dense medium separation bed, the dry method dense media separator of this employing dry method dense medium separation bed, it is characterized in that, dry method heavy-media separator comprises floating thing end media drum sieve, pipeline of dust collector, hypostasis end media drum sieve and magnetic separator; Wherein floating thing end media drum sieve and hypostasis end media drum sieve are arranged at the below that dry method dense media separator floats thing exhaust end and hypostasis exhaust end; Dry method dense media separator top is provided with pipeline of dust collector; All arrange sweep-up pipe at floating thing end media drum sieve, hypostasis end media drum sieve and magnetic separator place, whole system is totally-enclosed duty.The problems such as the utility model not only can solve that fluid density in fluid mapper process is unstable and air flow method is uneven and existing sculping screen is lower to fine de-mediated efficiency well, fine magnetizing mediums content after de-mediated is higher, can also realize fine de-mediated efficiency is significantly improved.

Description

Adopt dry method dense media separator and the sorting unit of dry method dense medium separation bed

Technical field

The utility model belongs to dry method ore dressing field, is specifically related to a kind of the dry method dense media separator and the dry method dense medium separation device that adopt this sorting bed, and it is specially adapted to being separated of the mineral of coal and other different densities, belongs to solid screening installation.

Background technology

At present, domestic and international application in industrial dry method dense media separator, mainly based on air jig and air table.Replace water to make separating medium with air, separating effect is poor, and production capacity is low, require that wind-force greatly, eliminates gradually.

From nineteen sixties, U.S. Douglas E, the scholars such as Canada Beeckmans J M successively carry out common gas-solid fluidized bed dry separation research, its grading principle is, using fine granular materials (as magnetite powder) as medium solid, under the effect of even ascending air, form the gas-particle two-phase fluidisation bed with certain density, selected material (as coal) feeds by fluidized bed densities layering after bed, thus realizes sorting.But because these scholars just based on fluidized-bed reactor material principle,displacement, do not have to further investigate the concentrated phase high density fluidization characteristic (as air distributor, medium solid grain size distribution etc.) being applicable to coal separation, fail to realize industrialization on chemical industry.

From the eighties in 20th century, China Mining University takes to the research of fluidization dry coal preparation aspect, develops the dry separation technology based on Dual-Phrase Distribution of Gas olid and equipment.Utilize fluidizing gas and the medium solid (as magnetite powder) with certain particle size, form concentrated phase fluid bed, selected material is subject to the buoyancy of fluidized-bed layer global density in gas-solid phase bed, according to bed density layering, the material being less than bed density floats, be greater than the material sinking of bed density, thus realize effective sorting of selected material.Gas-solid dense medium separation fluid bed is that world's coal provides a clean sorting new way of efficient dry method, has broad application prospects and major application value.Since Divine Land, Tangshan Machinery Co., Ltd. started to study dry method dense medium separation theory and sorting process in 2006, after a large amount of datas of dry method dense medium sorting are analyzed, successfully develop dry method dense medium separation device of new generation, and be successfully applied to industrialization.

But, there is following problem in the past to the research of dry method dense media separator: in fluid mapper process, fluid density is unstable and air flow method is uneven, and thus more difficult raising is to the sharpness of separation of difficult separation coal and efficiency; And it is lower to fine de-mediated efficiency to there is existing sculping screen, the problems such as the fine magnetizing mediums content after de-mediated is higher, thus make fine de-mediated efficiency can not get improving.

Utility model content

In order to solve problems of the prior art, the utility model proposes a kind of the dry method dense media separator and the sorting unit that adopt dry method dense medium separation bed, the problems such as the dry method dense media separator of this employing dry method dense medium separation bed and sorting unit not only can solve that fluid density in fluid mapper process is unstable and air flow method is uneven and existing sculping screen is lower to fine de-mediated efficiency well, fine magnetizing mediums content after de-mediated is higher, can also realize fine de-mediated efficiency is significantly improved.

According to first aspect of the present utility model, provide a kind of dry method dense media separator adopting dry method dense medium separation bed, it is characterized in that, dry method heavy-media separator comprises floating thing end media drum sieve, pipeline of dust collector, hypostasis end media drum sieve and magnetic separator; Wherein floating thing end media drum sieve and hypostasis end media drum sieve are arranged at the below that dry method dense media separator floats thing exhaust end and hypostasis exhaust end; Dry method dense media separator top is provided with pipeline of dust collector; All arrange sweep-up pipe at floating thing end media drum sieve, hypostasis end media drum sieve and magnetic separator place, whole system is totally-enclosed duty.

Wherein, dry method heavy-media separator comprises the bellows chamber of the air feed system constituting dry method dense media separator, roots blower and high-pressure air pipe further.Floating thing end discharger and hypostasis end discharger are positioned at the both sides of dry method dense media separator.Medium powder conveying worm is positioned at the below that hypostasis scrapes plate exit.

Preferably, stainless steel grate is distributed in high-pressure blast indoor.

According to second aspect of the present utility model, provide a kind of sorting unit adopting dry method dense medium separation bed, adopt above-mentioned dry method dense media separator, by raw coal preparation, sorting, dense medium purifica tion reclaims, air feed dedusting is integrated is assemblied in identical platform.

Further, the operation principle of above-mentioned sorting unit is as follows:

(1) fluidization assorting room

Fine-grained solids medium solid is under the effect of the ascending air after even distributing wind, form the gas-solid phase with quasi-fluid characteristic, selected material is subject to the buoyancy of fluidized-bed layer global density in gas-solid phase bed, thus according to bed density layering, the material being less than bed density floats, be greater than the material sinking of bed density, the weight product after layering is discharged respectively by scraping plate transmission mechanism, completes assorting room; Dry method dense media fluid bed dry method dense media separator uses above-mentioned principle to carry out sorting to selected material exactly, obtains cleaned coal and tail coal product;

(2) the separation system course of work

System process is that compressed air forms equally distributed ascending air by pre-air compartment and air distribution plate, and forms the fluidized-bed layer with certain density with the medium solid effect in dry method dense media separator; Feed coal evenly feeds in dry method dense media separator by batcher after (drying) classification (100 ~ 6mm), is discharged by discharge mechanism by light, the heavy product after fluidized-bed layer density stratification; Light product and heavy product, respectively through sculping screen de-mediated, obtain cleaned coal and tail coal; The medium solid part that sculping screen removes enters magnetic separator removal nonmagnetics (coal dust) wherein, and another part recycles; The feeding coal of circulatory mediator shunt volume, magnetic concentrate and circulatory mediator regulates according to the height of fluidized-bed layer in dry method dense media separator and density, realizes the control to fluidisation bed height and density; The dust that separation system produces in the course of the work, is collected by air inducing dedusting, circulates.

Therefore, dry method dense medium separation bed of the present utility model carries out high accuracy sorting for difficult separation coal etc. and the larger fluidisation sorting bed utilizing dense media and coal dust blending agent to carry out of production capacity, can to overcome in prior art that the unstable and air flow method of fluid density is uneven to be waited not enough, thus raising is to the sharpness of separation of difficult separation coal and efficiency.It is lower to fine de-mediated efficiency that it adopts the dry method dense media separator of dry method dense medium separation bed and sorting unit to overcome existing sculping screen further, and the problems such as the fine magnetizing mediums content after de-mediated is higher, make fine de-mediated efficiency be improved.Using dry method dense medium separation bed of the present utility model, effectively by treating sorting material in the gas-solid phase bed of gases at high pressure and dense media according to the layering of high/low density fluidisation, realizing sorting.

Accompanying drawing explanation

Fig. 1-1 to 1-3 is according to the front view of dry method dense media separator of the present utility model, left view and top view respectively.

Fig. 2 is according to dry method dense media separator process chart of the present utility model.

Fig. 3 is according to the dense medium separation main machine structure schematic diagram in dry method dense media separator of the present utility model.

Fig. 4-1 is stainless steel grate schematic diagram in dry method dense media separator structure.

Fig. 4-2 is longitudinal cross-section schematic diagrames of stainless steel grate in dry method dense media separator structure.

Fig. 4-3 is transverse sectional view of stainless steel grate in dry method dense media separator structure.

Fig. 5-1 is the front view of scraper plate pinch roller cleaning mechanism.

Fig. 5-2 is left views of scraper plate pinch roller.

Fig. 6-1 is scrapper conveyor wear-resistant block part front view.

Fig. 6-2 is scrapper conveyor wear-resistant block part sectional views.

Fig. 7-1 is scraper plate right view.

Fig. 7-2 is scraper plate front views.

Fig. 8-1 is high pressure air compartment detailed maps.

Fig. 8-2 is another high pressure air compartment detailed maps.

Detailed description of the invention

Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only a part of embodiment of the present utility model, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.

The utility model people, for problems of the prior art, carries out basis research and development and pilot development further to the research and development of dry method dense media separator of new generation, is mainly following aspect:

(1) laboratory basic research and model test

Based on studying accumulation for many years, laboratory basic research and model test have been carried out to dry method dense media fluid bed, found concentrated phase high density gas-solid fluidization dry separation theoretical, propose cloth wind and wide grade medium solid grating principle, establish wide-size distribution multi-component masses sorting kinetic model in concentrated phase High Density Gas-solid Fluidized.

(2) new generation dry method dense media fluid bed dry method dense media separator

Based on theoretical research, model test and pilot scale, have developed dry method dense media fluid-bed separator of new generation.Based on special technological requirement, according to the thought of pressure drop central tenet and low fluidization number, large pressure drop Compound Fabric wind, by dry method dense media separator critical component and integrally-built optimal design and innovation.

Below in conjunction with accompanying drawing, utility model is further described.

Fig. 1-1 to 1-3 is according to the front view of dry method dense media separator of the present utility model, left view and top view respectively.Wherein each Reference numeral specifically indicates: 1 bellows chamber, 2 floating thing end media drum sieves, 3 pipeline of dust collector, 4 feeding mouths, 5 dense medium separation main frames, 6 magnetic separators, 7 sack cleaners, 8 medium bucket elevators, 9 roots blowers, 10 sack cleaner air-introduced machines, 11 hypostasis end media drum sieves, 12 high-pressure air pipes.

Dry method dense media separator is discharged with a certain amount of medium in product, therefore floating thing end media drum sieve 2 and hypostasis end media drum sieve 11 is arranged at the below that dry method dense media separator floats thing exhaust end and hypostasis exhaust end, for being separated of sorted product and medium.

In order to prevent dry method dense media separator dust polluting environment in the course of the work, adopt sack cleaner 7 dedusting, dry method dense media separator top is provided with pipeline of dust collector 3, and make suction air volume be greater than dry method dense media separator work time wind supply quantity, in negative pressure state in machine, dust in dry method dense media separator is not escaped, simultaneously, sieve the places such as 11 and magnetic separator 6 all arrange sweep-up pipe in the floating thing end media drum sieve 2, the hypostasis end media drum that easily produce dust, whole system is in totally-enclosed duty.

Bellows chamber 1, roots blower 9 and high-pressure air pipe 12 constitute the air feed system of dry method dense media separator, for providing stable wind regime when dry method dense media separator works.

Fig. 2 is according to dry method dense media separator process chart of the present utility model.When using dry method dense media separator, mainly comprise the following steps:

The first step, 6-100mm level coal enters dry method dense media separator, and dense media also enters dry method dense media separator, and the feed of dry method dense media separator feeds along dry method dense media separator even width, feeding coal and add dense medium quality and answer continuously adjustabe.

Second step, air feed system is made up of roots blower, bellows chamber and some airducts, dry method dense media separator top connects air inducing dust pelletizing system, during work, in dry method dense media separator, compressed air is provided by air feed system, with dense media according to certain proportioning, form gas-solid phase bed, and then realize the layering sorting of different densities.

3rd step, dry method dense media separator is discharged with a certain amount of medium in product, so be provided with media drum sieve, is positioned over the below that dry method dense media separator floats thing exhaust end and hypostasis exhaust end, for being separated of sorted product and medium.In the magnetic separator that medium after separation utilizes medium bucket elevator to rise to above dry method dense media separator, by magnetic separator, the coal dust in medium is removed, purer medium is unloaded to dry method dense media separator inner, medium be can be recycled, reduce the consumption that is situated between.

4th step, dust sucting pipeline is arranged at dry method dense media separator top, and dust sucting pipeline connects sack cleaner, reduces the environmental pollution in the course of the work of dry method dense media separator.

Fig. 3 is according to the dense medium separation main machine structure schematic diagram in dry method dense media separator of the present utility model.In Fig. 3, each Reference numeral specifically indicates: 501 floating thing end dischargers, 502 floating thing scraper plate sprocket wheels, 503 floating thing scraper plate pinch rollers, 504 inspection windows, 505 inspection doors, 506 floating thing chain scraper plate, 507 medium powder conveying worms, 508 hypostasis scraper plate sprocket wheels, 509 hypostasis end dischargers, 510 hypostasis scraper plate pinch rollers, 511 main frame supporting legs, 512 hypostasis scraper plates, 513 high pressure air compartments, 514 glass flow rate meters, 515 host shells.

Floating thing end discharger 501 and hypostasis end discharger 509 are positioned at the both sides of main separation machine, and product and lock wind are discharged in its effect; Whole main frame of the present utility model is totally enclosed type, uses discharger can ensure that in main frame, blast is constant, air tight.

As shown in Figure 3, floating thing scraper plate sprocket wheel 502, floating thing scraper plate pinch roller 503, floating thing chain scraper plate 506, hypostasis scraper plate sprocket wheel 508, hypostasis end discharger 509, hypostasis scraper plate pinch roller 510 and hypostasis scraper plate 512 constitute the separation system in main separation machine, floating thing after sorting and hypostasis are transported to respectively the discharge port of main separation machine both sides, then via discharger, product are discharged.

Glass flow rate meter 514 is positioned at the below of dry method dense media separator, can detect the proportion of the gas-solid two-phase mixture in dry method dense media separator, helps more intuitively and exactly user to complete sorting.

Medium powder conveying worm 507 is positioned at the below that hypostasis scrapes plate exit, the discharge medium of hypostasis end can be transported in main separation machine.Inspection windows 504, inspection door 505 are equipment inspection and maintenance window, and host shell 515 is offered.The high-pressure blast that roots blower can be produced by boasting by high pressure air compartment 513 is distributed in main separation machine more equably.

Fig. 4-1 is stainless steel grate schematic diagram in dry method dense media separator structure, and wherein Fig. 4-2 is longitudinal cross-section schematic diagrames; Fig. 4-3 is transverse sectional view.Stainless steel grate is by justifying pull bar 41 and castor bar 42 forms.

This stainless steel grate is distributed in high-pressure blast indoor, the air compartment under preventing oarse-grained material from entering sieve, selects stainless steel grate because its wearability is good, not perishable, good rigidly, stable performance.

Fig. 5-1 is scraper plate pinch roller cleaning mechanism front view, and 5-2 is scraper plate pinch roller left view.Wherein each Reference numeral specifically indicates: 51 adjusting bolts, 52 comb, 53 pinch rollers.Comb 52 is with the pointed steel plate that can rotate according to certain track, under the support of adjusting bolt 51, its pointed tooth is under normal work, the groove outside diameter direction of good and pinch roller 53 will there is the gap of 2 millimeter, the material born on pinch roller can be scraped off, prevent the running orbit changing scrapper conveyor.

Fig. 6-1 is the front view of wear-resistant block, Fig. 6-2 is sectional views of wear-resistant block, wear-resistant block is the peculiar part of main separation machine inside strake machine, it is the excessive link connecting scraper plate and chain, in work, wear-resistant block along the tracks travel in main separation machine, so require it must do Wear-resistant Treatment (the A face as in figure) and abrasion hardness require more than HRC55.

Fig. 7-1 is the right view of scraper plate, and Fig. 7-2 is front views of scraper plate, and wherein each Reference numeral specifically indicates: 71 scraper plate base plates, 72 strengthen arc plate, 73 studs.When main separation machine sorting bed surface exceedes specific numerical value, in order to increase its rigidity and bending-resistant type, and weight can not overweight time, can make by schematic structure, namely save material, not affect its rigidity again.

Fig. 8-1 is high pressure air compartment detailed maps.Fig. 8-2 is another high pressure air compartment detailed maps.Wherein each Reference numeral specifically indicates: 801 air compartment side plates, 802 stainless steel castor bar grizzl(e)ies, 803 air distribution plates, 804 air compartment base plates, 805 air inlet pipe.Air compartment side plate 801 and air compartment base plate 804 constitute air compartment, air distribution plate 803 above base plate, air inlet pipe 805 perforate on base plate, stainless steel castor bar grizzl(e)y 802 above air compartment, purposes for making air feed more even, without dead angle.

It is single that dry method dense media separator of the present utility model overcomes existing strand scrapper conveyor speed, and upper end defeated coal efficiency is low, and it is unclean that lower end spoil scrapes row, leaves the problems such as dead angle.

Adopt dry method dense media separator of the present utility model, a kind of dry method dense media fluid bed dry method dense media separator can be provided, this dry method dense media separator has the fluidization sorting bed of the defect that can overcome prior art, it has rational discharge scraper plate, have Rational Sizing of Wood Material adjustable-speed, reasonably effectively sorting segment length, sorting bed layer height, thus improves sharpness of separation.It has rational medium-separation device further, to improve de-mediated efficiency and to increase product recovery rate.

Closer, use dry method dense media separator of the present utility model, can provide a kind of dry method dense media fluid bed separation device, it can integrate sorting and dedusting, air-supply, feed, and its sorting groove solves the defect of sorting groove of the prior art.

Study carefully its essence of the present utility model, first dry method dense media separator of the present utility model technically provides a kind of dense media fluidization sorting bed what overcome prior art defect, and three kinds of flowings stream (gas, medium solid and coal) comprised in sorting bed all cross in sorting bed.Medium solid is in the fluidisation separation chamber of sorting bed, and Compressed Gas enters after air chamber is tentatively all pressed and enters fluidisation separation chamber again by medium solid fluidisation, forms the fluid bed being applicable to sorting.Double-strand scraping plate conveying device counterclockwise rotates with friction speed respectively, enter coal separation to enter from the one end on top, cochain promotes pan feeding to left movement, pan feeding is layered at the volley, hypostasis can not be promoted by scraper plate again, it will sink to the bottom of fluidisation separation chamber gradually, and hypostasis is discharged from tail coal end by lower chain; Floating thing above fluid bed is discharged from cleaned coal end by cochain.Fluidisation is the process of a continuous air blast, and gas, after the emersion of solid particle interface, should be barotropic state, but the absorbing quantity of dedusting be greater than Fluidization wind rate, makes the upper space in sorting main frame be in negative pressure state, and row's coal end and other position do not have dirt effusion.Floating thing and hypostasis can take part medium solid out of when discharging, and after rotary screen de-mediated, oversize can be transported by conveying equipment and remove assigned address; The lower medium solid of sieve drops on the lower medium belt of sieve, upper bucket elevator returns sorting main frame through chute.

Rotary screen medium-separation device refers to that the cleaned coal after carrying out sorting from sorting bed and spoil carry out de-mediated from entering respective rotary screen medium-separation device after cleaned coal mouth and spoil mouth are discharged respectively, rotary screen utilizes central axis to drive compass screen surface to rotate, material is made to carry out de-mediated on rotation compass screen surface, adopt this kind of device, de-mediated efficiency is higher.

In fluidized-bed layer, effective sorting is obtained in order to enable material, light density material after being sorted fully is floated, and heavy density material can be sunk completely, and have employed double-strand carrier bar discharge device, upper strata carrier bar can be utilized to carry light density material, two kinds of materials are fully effectively separated.

One of utility model point of the present utility model is: based on to dry method dense media separator critical component and integrally-built optimal design and innovation, the dry method dense media fluid bed dry method dense media separator developed substantially increases the uniform and stable property of fluidized-bed layer, improve separating effect, reduce maintenance of equipment work amount and time, can ensure that dry method dense media separator is long-time, continuous, stable, run efficiently.

Another of utility model point of the present utility model is: new gas distributor and quick detachable air-distribution device.Gas distributor is one of key factor affecting bed fluidisation and separation performance, and its major parameter comprises material, structure, pressure drop, percent opening, aperture etc.For sorted product is discharged outside machine continuously, scraping plate conveying device is provided with in fluid bed, under the thrust of air distribution plate, high density, high rigidity hypostasis and air distribution plate extrude, rub, there is fragmentation in various degree in hypostasis, produce particulate hypostasis, meanwhile, air distribution plate upper surface is subject to wearing and tearing in various degree.Therefore, air distribution plate should have good anti-plug-hole, easy to clean, abrasion resistance properties.Based on special technological requirement and pressure drop accurate number Cp diagnostic method, carry out a large amount of theories and experimental study, developed two class combined type gas distributors.One is base steel fiber composite distributor, is compositely suppressed to form primarily of steel substrate flitch and fibrage, has the features such as surfacing, wear-resistant, anti-lump material embeds, cloth wind is even.The effect of steel substrate flitch supports bed material, shock resistance and wearing and tearing, and fibrolaminar effect controls pressure drop, even distributing wind.Two is the large pressure drop gas distributors of two-stage composite, is formed by stacking primarily of base steel porous backplate and woven wire pressboard or weave cotton cloth, and has easy to clean, surfacing, the feature such as wear-resistant.The effect of base steel porous backplate supports bed material, shock resistance and wearing and tearing, detachably clears up when needed, for effectively delaying the plug-hole cycle, can adopt coniform hole, choosing suitable ratio of height to diameter simultaneously.Woven wire pressboard or the effect of weaving cotton cloth control pressure drop, even distributing wind, simultaneously owing to having some strength, can embed and supplemental support bed material by anti-lump material.

In coal separation process, sorted product need be discharged outside machine by drag conveyor in dry method dense media separator continuously, by its thrust, bottom bed, be in the strong hardness hypostasis of stacking states and air distribution plate moment and be in and extrude and abrasion state, which results in the fragmentation of hypostasis and the wearing and tearing of air distribution plate upper surface, and the particulate hypostasis pulverizing generation easily blocks air admission hole, have impact on performance and the service life of air distribution plate.Once air distribution plate damages, be difficult to change, and workload is very large, needs 5 ~ 7 day time just can complete.In order to solve this problem, propose the quick detachable air-distribution device of a kind of drawer type, this device dismounting is consuming time only needs 3 ~ 5 hours, is convenient to maintenance and regulates, under the prerequisite not affecting production task, can ensure that dry method dense media separator runs for a long time, continuously, stably.

Medium solid short distance reflux:

In assorting room, part medium solid is discharged outside dry method dense media separator with product.If medium solid internal circulating load is comparatively large, then adds the regulation and control difficulty of fluid bed, affect separating effect.For reducing medium solid internal circulating load, in dry method dense media separator design process, add medium solid short distance reflux, as seen in figs. 5-6.Apply this short distance reflux, the medium solid internal circulating load outside machine decreases 80%, considerably reduces and runs power consumption and cost, is easy to fluid bed regulation and control, improves separating effect.

Another being of utility model point of the present utility model: process system design is optimized:

Modular dry method dense media fluid bed Recognition Applied in Coal Preparation System by raw coal preparation, sorting, dense medium purifica tion reclaims, air feed dedusting is integrated is assemblied in identical platform, is a kind of coal high-efficiency dry coal preparation system of continued operation.Its operation principle is as follows:

(1) fluidization assorting room

Fine-grained solids medium solid is under the effect of the ascending air after even distributing wind, form the gas-solid phase with quasi-fluid characteristic, selected material is subject to the buoyancy of fluidized-bed layer global density in gas-solid phase bed, thus according to bed density layering, the material being less than bed density floats, be greater than the material sinking of bed density, the weight product after layering is discharged respectively by scraping plate transmission mechanism, completes assorting room.Dry method dense media fluid bed dry method dense media separator uses above-mentioned principle to carry out sorting to selected material exactly, obtains cleaned coal and tail coal product.

(2) the separation system course of work

System process is that compressed air forms equally distributed ascending air by pre-air compartment and air distribution plate, and forms the fluidized-bed layer with certain density with the medium solid effect in dry method dense media separator.Feed coal evenly feeds in dry method dense media separator by batcher after (drying) classification (100 ~ 6mm), is discharged by discharge mechanism by light, the heavy product after fluidized-bed layer density stratification.Light product and heavy product, respectively through sculping screen de-mediated, obtain cleaned coal and tail coal.The medium solid part that sculping screen removes enters magnetic separator removal nonmagnetics (coal dust) wherein, and another part recycles.The feeding coal of circulatory mediator shunt volume, magnetic concentrate and circulatory mediator regulates according to the height of fluidized-bed layer in dry method dense media separator and density, realizes the control to fluidisation bed height and density.The dust that separation system produces in the course of the work, is collected by air inducing dedusting, circulates.

(3) dry method dense media separator has following breakthrough

Break through traditional wet coal preparation theoretical, founded concentrated phase high density gas-solid fluidization dry separation theoretical, proposed cloth wind and wide grade medium solid grating principle.Develop the large pressure drop gas distributor of two-stage composite, there is the performances such as cloth wind is even, quick detachable, anti-blocking resistant wear; Devise short distance reflux, make medium solid internal circulating load decrease 80%; Adopt wide grade medium solid, leading size fraction ranges has widened 2.5 times, considerably reduces operating cost.

By integrated to relevant auxiliary equipment for dry method dense media fluid bed dry method dense media separator of new generation, modularization, develop modular dry method dense media fluid bed Recognition Applied in Coal Preparation System and equipment, disposal ability is 40 ~ 60t/h, and sharpness of separation (possible deviation E value) is 0.05 ~ 0.08g/cm ³, pan feeding grade is 100 ~ 6mm, and separating density can at 1.3 ~ 2.2g/cm ³regulate in scope, sorting recovery efficiency >90%, ton coal is situated between and consumes <0.5kg.Modular dry method dense media fluid bed Recognition Applied in Coal Preparation System absorbing quantity is greater than wind supply quantity, and system is negative pressure state, and rationally, dust is little for dust pelletizing system coupling; System cloud gray model is steady, and noise is little, meets environmental requirement.

As above-mentioned, know and describe in detail the technical scheme that the utility model proposes.Although preferred embodiment of the present utility model is described in detail and is explained the utility model, but this area those skilled in the art be appreciated that, when not deviating from the spirit and scope of the present utility model of claims definition, multiple amendment can be made in form and details.

Claims (6)

1. adopt the dry method dense media separator of dry method dense medium separation bed, it is characterized in that, dry method heavy-media separator comprises floating thing end media drum sieve, pipeline of dust collector, hypostasis end media drum sieve and magnetic separator; Wherein floating thing end media drum sieve and hypostasis end media drum sieve are arranged at the below that dry method dense media separator floats thing exhaust end and hypostasis exhaust end; Dry method dense media separator top is provided with pipeline of dust collector; All arrange sweep-up pipe at floating thing end media drum sieve, hypostasis end media drum sieve and magnetic separator place, whole system is totally-enclosed duty.

2. according to dry method dense media separator according to claim 1, it is characterized in that, dry method heavy-media separator comprises the bellows chamber of the air feed system constituting dry method dense media separator, roots blower and high-pressure air pipe further.

3. according to dry method dense media separator according to claim 1, it is characterized in that, floating thing end discharger (501) and hypostasis end discharger (509) are positioned at the both sides of dry method dense media separator.

4. according to dry method dense media separator according to claim 3, it is characterized in that, medium powder conveying worm (507) is positioned at the below that hypostasis scrapes plate exit.

5. according to dry method dense media separator according to claim 3, it is characterized in that, stainless steel grate is distributed in high-pressure blast indoor.

6. adopt the sorting unit of dry method dense medium separation bed, it is characterized in that, adopt the dry method dense media separator described in claim 1-5, by raw coal preparations, sorting, dense medium purifica tion recovery, air feed dedusting is integrated is assemblied in identical platform.