CN203862375U - Washing and selecting device targeted for high-ash high-mud high-gangue coal - Google Patents
Washing and selecting device targeted for high-ash high-mud high-gangue coal Download PDFInfo
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- CN203862375U CN203862375U CN201420105367.5U CN201420105367U CN203862375U CN 203862375 U CN203862375 U CN 203862375U CN 201420105367 U CN201420105367 U CN 201420105367U CN 203862375 U CN203862375 U CN 203862375U
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Abstract
The utility model provides a washing and selecting device targeted for high-ash high-mud high-gangue coal. Raw coal is firstly selected and placed in by an air dense medium coal picker, and then the air dense medium coal picker is connected with a three-product dense medium whirlcone. A coarse fine coal outlet of the three-product dense medium whirlcone is connected with a medium-dehydration water-dehydration sieve. A coarse gangue outlet is connected with another medium-dehydration water-dehydration sieve. A coarse middlings outlet is connected with a dense medium separation device which is then sequentially connected with a floatation column, a spiral chute and a water medium whirlcone. Secondary floatation columns are adopted for floatation, and floatation efficiency and floatation recovery rate are combined.
Description
Technical field
The utility model relates to the screening installation of coal slime, is especially applicable to the screening installation of the difficult separation coal mud of the high spoil of high grey high mud.
Background technology
Along with China's a large amount of excess load exploitations to coal for many years, the coal resource of high-quality gets up fewer, formerly it seems that the difficult meager coal ore deposit of reclaiming of difficult exploitation has become the mineral resources that must face now, these meager coal ore deposits have the several respects such as high ash, high mud, high spoil rate, washability be poor mostly.Wherein the fine coal content of particularly-200 object increases, often because the thin mud of high ash is carried secretly, ash content is higher to cause floatation clean coal, coarse granule intergrowth also produces interference to floatation process, the ash content of intergrowth mineral is general approaching with coal ash, ratio accounts for 20% left and right of raw coal, intergrowth part is as entered cleaned coal part, pollute cleaned coal, if intergrowth part does not reclaim, enter tail coal part, make tail coal part on the low side, so it is that floatation feed is sent into flotation column (or flotation device) after ore pulp preprocessor is processed that the sorting problem of thin sludge-polluted and intergrowth mineral has become the flotation process of the key factor routine of the final head coal product quality of serious restriction, flotation column (or flotation device) sub-elects concentrate and tailings, and enter subsequent product processing operation separately.This technique is mainly applicable to the conventional easily sorting of coal separation mud, in China, be widely used, but for the high spoil difficult separation coal of the grey high mud of height mud, there is product recovery rate and the low defect of production efficiency in this technique, be difficult to solve the thin mud of high ash and carry secretly and the impact of intergrowth mineral on floatation process, therefore the key technology of the efficient separation of the high spoil rate of the adaptive high grey difficult separation coal mud of exploitation has become a difficult problem needing solution in coal resources efficient clean utilization process badly.
Summary of the invention
The washing appliance for the high spoil coal of the grey high mud of height in the utility model, it is first selected in air dense medium coal picker by raw coal, after air dense medium coal picker, connect three products dense medium cyclone, the thick cleaned coal outlet of three products dense medium cyclone connects de-mediated dewatering screen, thick spoil outlet connects another de-mediated dewatering screen, in thick, coal export connects dense medium screening installation, connects successively flotation column, spiral chute and water-only cyclone after dense medium screening installation.
More preferably, the thick cleaned coal outlet of three products dense medium cyclone connects de-mediated dewatering screen, the compass screen surface of de-mediated dewatering screen is divided into three parts, compass screen surface first divides into closes the bucket that is situated between, on the second portion of compass screen surface and third part sieve, be provided with water injector, the sieve of compass screen surface second portion is divided into magnetic separator, and third part sieve is divided into centrifuge, and the black water that centrifuge and magnetic separator are selected is introduced fast-flotation post by pipeline.
More preferably, the thick spoil outlet of three products dense medium cyclone connects another de-mediated dewatering screen, the compass screen surface of this de-mediated dewatering screen is divided into three parts, compass screen surface first divides into closes the bucket that is situated between, on the second portion of compass screen surface and third part sieve, be provided with water injector, the sieve of compass screen surface second portion is divided into magnetic separator, and third part sieve is divided into centrifuge, and the black water that centrifuge and magnetic separator are selected is introduced middling speed flotation column by pipeline.
More preferably, the outlet of three products dense medium cyclone connects dense medium screening installation and obtains two kinds of products of weight, and light product is after dehydration de-mediated, and the qualified medium obtaining enters qualified medium bucket, and the fine grained cleaned coal obtaining is as final products; Heavy product, after dehydration de-mediated, obtains qualified medium and enters qualified medium bucket, and the fine grained spoil obtaining is as spoil, and the black water of deviating from from two kinds of products of weight is mixed into flotation flowsheet.
More preferably, described flotation flowsheet is used fast-flotation post and this secondary floatation of middling speed flotation column, the foam of secondary floatation converges for fine cleaned coal, the underflow of fast-flotation post enters middling speed flotation column, tool ultrasonic oscillation structure in middling speed flotation column, in middling speed flotation column, mine tailing enters spiral chute, and spiral chute, thickener and ore mill form closed circuit grinding loop jointly, after ore grinding, coal slurry returns to middling speed flotation column, and the black water that is rich in ash and mud that spiral chute sub-elects enters charging pump.
More preferably, charging pump is connected with cloth helix tube, the outlet of cloth helix tube is connected with the feeding mouth of water-only cyclone, and the inner periphery tube wall of cloth helix tube outlet and the excircle tube wall of water-only cyclone feeding mouth join, the tube wall of the excircle tube wall of cloth helix tube outlet and the close center of circle side of water-only cyclone feeding mouth joins.
More preferably, the underflow of water-only cyclone enters high frequency shale shaker, and the screenings of high frequency shale shaker enters thickener, connects filter press after thickener, and the recirculated water that filter press is produced is reused; The overflow of water-only cyclone enters thickener, and the solid that the oversize of high frequency shale shaker and filter press sub-elect is coal slime.
Beneficial effect:
1) the utility model is used air dense medium coal picker, not only throws in advance except part spoil prevents it and enters the sorting pressure that follow-up flow process strengthens rear portion equipment, does not also introduce the use of water, and not only water-saving and emission-reducing, does not also affect the sorting of dense medium cyclone below;
2) coal in thick is carried out to further sorting targetedly,, for the sorting targetedly of the grey high mud part of height, the coal charge flow of whole separation system is greatly reduced.Use floatation at different velocity, introduce rich coal water and meager coal water, make one-level flotation efficient, quick; Secondary floatation is comprehensive, thorough, the recovery coal of maximum limit, minimizing ash and the impact of mud on coal flotation of minimum degree.And use the method for spiral chute and closed circuit grinding that the mineral intergrowth degree of depth is dissociated, further separated plaster and coal.Use cloth helix tube to carry out particle controls of arranging to the selected black water of water-only cyclone, make cyclone discharge as much as possible solid, the sorting pressure of minimizing to follow-up equipment.
To sum up, this technological process is reasonable, small investment, and power consumption is little, and operating cost is low.With traditional sorting process, compare, the efficiency of separation is high, remarkable in economical benefits.
Accompanying drawing explanation
Fig. 1 is process flow system figure of the present utility model.
Fig. 2 is the front view of cloth helix tube of the present utility model and water-only cyclone.
Fig. 3 is the top view of Fig. 2.
The specific embodiment
Below in conjunction with accompanying drawing, enforcement of the present utility model is further described:
As shown in Figure 1, by the selected air dense medium coal picker of raw coal, air dense medium coal picker is dry type coal picker, and it adopts air dense medium fluidized bed dry separation, and coal picker is mainly partly comprised of air chamber, air distribution plate, scraping plate conveying device etc.The assorting room of material (raw coal) in separator is: 100 13mm grade raw coal and dense media after screening add in separator respectively simultaneously.The body input bottom air chamber of calming the anger with certain speed, after air distribution plate, stepless action, in dense media, forms the uniform and stable gas-solid fluidisation suspended substance with certain density.According to Archimedes' principle, light-heavy material is by density stratification in suspended substance, and light thing floating, weight sink.The material of layering by scraping plate conveying device reverse discharge from bed body, can obtain qualified weight product respectively after de-mediated.Utilize the spoil of discharge in advance that air dense medium coal picker can be preliminary, prevent that spoil from entering follow-up flow process in a large number.Air dense medium method requires selected raw coal water content low, otherwise selected raw coal blocks the wind distributing hole air distribution plate.Therefore,, if feed coal water content is too high, such as the coal that produce in southern colliery, before entering air dense medium coal picker, need to carry out high wind dry or natural drying.
The spoil that air dense medium coal picker is selected is directly abandoned, and the qualified coal of selecting enters three products dense medium cyclone, and in use coal feeds cyclone top by the central tube deadweight of three products dense medium cyclone, and heavy-media suspension pumps into cyclone upper end along tangent line.With a kind of low-density suspension, can select thick cleaned coal, thick middle coal and thick three kinds of products of spoil simultaneously.Air dense medium coal picker, not only throw in advance except part spoil prevents it and enter the sorting pressure that follow-up flow process strengthens rear portion equipment, also do not introduce the use of water, water-saving and emission-reducing not only, also do not affect the sorting of dense medium cyclone below, if used wet split before three products dense medium cyclone, coal charge will contain quite a few moisture content, when dense media is separated, can dilute heavy-media suspension, because the moisture content of coal charge in wet split is uncontrollable, so the sorting of heavy medium cyclone also can be greatly affected.
Thick cleaned coal enters de-mediated dewatering screen, the compass screen surface of de-mediated dewatering screen can be divided into three parts, thick cleaned coal becomes coarse granule cleaned coal from de-mediated dewatering screen out, what thick cleaned coal was deviate from compass screen surface first is qualified medium, qualified medium directly enters and closes the bucket that is situated between, second portion and third part at compass screen surface, thick cleaned coal is carried out to water spray, the screenings that second portion is taken off enters magnetic separator and selects dense media, and the screenings that third part is taken off enters centrifuge and selects and be incorporated to coarse granule cleaned coal after oarse-grained coal.The black water that centrifuge and magnetic separator are selected carries out subsequent treatment as rich coal water.
Thick spoil also enters de-mediated dewatering screen, thick spoil becomes spoil from de-mediated dewatering screen out, what thick spoil was deviate from compass screen surface first is qualified medium, qualified medium directly enters and closes the bucket that is situated between, second portion and third part at compass screen surface, thick spoil is carried out to water spray, and the screenings that second portion is taken off enters magnetic separator and selects dense media, and the screenings that third part is taken off enters centrifuge and selects and be incorporated to spoil after oarse-grained spoil.The black water that centrifuge and magnetic separator are selected carries out subsequent treatment as meager coal water.
As the washing of the high spoil coal of the grey high mud of height, difficulty maximum be the processing to coal in thick, in prior art, also have the de-mediated of directly dewatering of middle coal, then as low-quality coal, sell, this greatly reduces the economic benefit of coal undoubtedly.In the present embodiment, thick middle coal is further carried out to dense medium sorting, segment out two kinds of products of weight, light product is after dehydration de-mediated, obtain qualified medium and enter qualified medium bucket, the thin cleaned coal obtaining is as final products, and heavy product is after dehydration de-mediated, obtain qualified medium and enter qualified medium bucket, the particulate spoil obtaining is as spoil.The black water of deviating from from two kinds of products of weight is mixed into flotation flowsheet.
Flotation flowsheet comprises fast-flotation in fast-flotation post and the middling speed flotation in middling speed flotation column, the flow process that adopts this floatation at different velocity be because, the high spoil coal of high grey high mud is discharged after spoil basic, high ash and mud still mix with coal, if adopt one-level flotation column, at the later stage of flotation flowsheet coal grain, be difficult to floating, flotation efficiency is low, and the rate of recovery is low.Described Fu Meishui enters fast-flotation post, further improves the content of coal, and meager coal water enters middling speed flotation column, further dilutes coal content, so further widens the grade gap that enters coal separation of two-stage flotation, according to the concrete choice for use flotation agent of these gaps.In middling speed flotation column, use ultrasonic oscillation structure, make the ash of high concentration and the surface that mud leaves coal, make so the easy floating of being combined with the collecting agent of flotation of coal.Secondary floatation system has not only improved efficiency of separation sorting quality, has also saved medication.The foam of fast-flotation and middling speed flotation is as fine cleaned coal, in flotation column, mine tailing enters spiral chute, spiral chute is elected the mineral intergrowth of coarsegrain, enter closed circuit grinding, after ore grinding, return to middling speed flotation column, because the effect of ore grinding is dissociated mineral intergrowth, expose on coal grain surface, therefore can be combined with flotation agent, the ash of symbiosis or mud enter mine tailing and are again discharged from it.The black water that is rich in ash and mud that spiral chute sub-elects enters charging pump.
Referring to Fig. 2, 3, the black water forced feed cloth helix tube 1 that charging pump (not shown) sub-elects spiral chute, black water is due to the centrifugal motion in cloth helix tube, the outside circumference tube wall motion of coarse granule, on the cross section in the exit of cloth helix tube, rely on excircle tube wall place's enrichment coarse granule mine tailing, and fine grained mine tailing concentrates on inner periphery tube wall side, cloth helix tube is connected with the feeding mouth of water-only cyclone 2, and the inner periphery tube wall of cloth helix tube and the excircle tube wall of water-only cyclone feeding mouth join, the tube wall of the close center of circle side of the excircle tube wall of cloth helix tube and water-only cyclone feeding mouth joins, like this, mine tailing enters after water-only cyclone, coarse granule is to the inwall motion of water-only cyclone sorting chamber, in coarse granule migration traverse, stoped the motion of fine grained to overflow pipe, be that coarse granule is pushed fine grained the inwall of sorting chamber to and discharges from underflow, the solids content that the water flowing out from overflow pipe is like this mingled with greatly reduces.The reason of doing is like this to wish as much as possible the solid of mine tailing to be sorted out; no matter be such fine particle or the such moderate particle of silt particle of ash, therefore, even the granularity of particle is uneven in black water; but through the pretreatment of cloth helix tube, through water-only cyclone, substantially discharge.If without the pretreatment of cloth helix tube, the tiny ash in black water will go out to run out of from overfall in a large number, increases the weight of the burden of thickener.
The underflow of water-only cyclone enters high frequency shale shaker, and the screenings of high frequency shale shaker enters thickener, connects filter press after thickener, and the recirculated water that filter press is produced is reused.The overflow of water-only cyclone enters thickener, and the solid that the oversize of high frequency shale shaker and filter press sub-elect is coal slime.
Like this, after whole sorting flow process, sub-elect coarse granule cleaned coal, fine grained cleaned coal, fine cleaned coal, coal slime and spoil, effectively removed high ash and high coal and the impact of spoil composition on readymade coal.
Although the washing process of the disclosed high spoil coal of the high mud of a kind of high ash relating to has been carried out to special description with reference to embodiment; embodiment described above is illustrative and not restrictive; in the situation that not departing from the utility model scope, all variations and modification are all within protection domain of the present utility model.
Claims (7)
1. the washing appliance for the high spoil coal of the grey high mud of height, it is characterized in that: raw coal is first selected in to air dense medium coal picker, after air dense medium coal picker, connect three products dense medium cyclone, the thick cleaned coal outlet of three products dense medium cyclone connects de-mediated dewatering screen, thick spoil outlet connects another de-mediated dewatering screen, in thick, coal export connects dense medium screening installation, connects successively flotation column, spiral chute and water-only cyclone after dense medium screening installation.
2. equipment according to claim 1, it is characterized in that: the thick cleaned coal outlet of three products dense medium cyclone connects de-mediated dewatering screen, the compass screen surface of de-mediated dewatering screen is divided into three parts, compass screen surface first divides into closes the bucket that is situated between, on the second portion of compass screen surface and third part sieve, be provided with water injector, the sieve of compass screen surface second portion is divided into magnetic separator, and third part sieve is divided into centrifuge, and the black water that centrifuge and magnetic separator are selected is introduced fast-flotation post by pipeline.
3. equipment according to claim 1, it is characterized in that: the thick spoil outlet of three products dense medium cyclone connects another de-mediated dewatering screen, the compass screen surface of this de-mediated dewatering screen is divided into three parts, compass screen surface first divides into closes the bucket that is situated between, on the second portion of compass screen surface and third part sieve, be provided with water injector, the sieve of compass screen surface second portion is divided into magnetic separator, and third part sieve is divided into centrifuge, and the black water that centrifuge and magnetic separator are selected is introduced middling speed flotation column by pipeline.
4. equipment according to claim 1, it is characterized in that: the outlet of three products dense medium cyclone connects dense medium screening installation and obtains two kinds of products of weight, light product is after dehydration de-mediated, and the qualified medium obtaining enters qualified medium bucket, and the fine grained cleaned coal obtaining is as final products; Heavy product, after dehydration de-mediated, obtains qualified medium and enters qualified medium bucket, and the fine grained spoil obtaining is as spoil, and the black water of deviating from from two kinds of products of weight is mixed into flotation flowsheet.
5. equipment according to claim 1, it is characterized in that: described flotation flowsheet is used fast-flotation post and this secondary floatation of middling speed flotation column, the foam of secondary floatation converges for fine cleaned coal, the underflow of fast-flotation post enters middling speed flotation column, tool ultrasonic oscillation structure in middling speed flotation column, in middling speed flotation column, mine tailing enters spiral chute, spiral chute, thickener and ore mill form closed circuit grinding loop jointly, after ore grinding, coal slurry returns to middling speed flotation column, and the black water that is rich in ash and mud that spiral chute sub-elects enters charging pump.
6. equipment according to claim 1, it is characterized in that: charging pump is connected with cloth helix tube, the outlet of cloth helix tube is connected with the feeding mouth of water-only cyclone, and the inner periphery tube wall of cloth helix tube outlet and the excircle tube wall of water-only cyclone feeding mouth join, the tube wall of the excircle tube wall of cloth helix tube outlet and the close center of circle side of water-only cyclone feeding mouth joins.
7. equipment according to claim 1, is characterized in that: the underflow of water-only cyclone enters high frequency shale shaker, and the screenings of high frequency shale shaker enters thickener, connects filter press after thickener, and the recirculated water that filter press is produced is reused; The overflow of water-only cyclone enters thickener, and the solid that the oversize of high frequency shale shaker and filter press sub-elect is coal slime.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420105367.5U CN203862375U (en) | 2014-03-10 | 2014-03-10 | Washing and selecting device targeted for high-ash high-mud high-gangue coal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420105367.5U CN203862375U (en) | 2014-03-10 | 2014-03-10 | Washing and selecting device targeted for high-ash high-mud high-gangue coal |
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| CN203862375U true CN203862375U (en) | 2014-10-08 |
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| CN201420105367.5U Expired - Fee Related CN203862375U (en) | 2014-03-10 | 2014-03-10 | Washing and selecting device targeted for high-ash high-mud high-gangue coal |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103785529A (en) * | 2014-03-10 | 2014-05-14 | 衢州市易凡设计有限公司 | Washing equipment for coal with much ash, mud and gangue |
| CN104741214A (en) * | 2015-04-01 | 2015-07-01 | 唐山森普工程设计有限公司 | System and method for preparing pulverized coal fuel of pulverized-coal boiler by using coal washing tailings |
| CN110732165A (en) * | 2019-11-26 | 2020-01-31 | 烟台鑫矿工程技术服务有限公司 | system and method for improving processing capacity of thickener |
-
2014
- 2014-03-10 CN CN201420105367.5U patent/CN203862375U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103785529A (en) * | 2014-03-10 | 2014-05-14 | 衢州市易凡设计有限公司 | Washing equipment for coal with much ash, mud and gangue |
| CN104741214A (en) * | 2015-04-01 | 2015-07-01 | 唐山森普工程设计有限公司 | System and method for preparing pulverized coal fuel of pulverized-coal boiler by using coal washing tailings |
| CN110732165A (en) * | 2019-11-26 | 2020-01-31 | 烟台鑫矿工程技术服务有限公司 | system and method for improving processing capacity of thickener |
| CN110732165B (en) * | 2019-11-26 | 2023-09-29 | 烟台鑫矿服工程管理集团有限公司 | System and method for improving throughput of thickener |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141008 Termination date: 20160310 |