CN105170306B - A kind of washing process for the high high high spoil coal of mud of ash - Google Patents
A kind of washing process for the high high high spoil coal of mud of ash Download PDFInfo
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- CN105170306B CN105170306B CN201510625364.3A CN201510625364A CN105170306B CN 105170306 B CN105170306 B CN 105170306B CN 201510625364 A CN201510625364 A CN 201510625364A CN 105170306 B CN105170306 B CN 105170306B
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- 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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
Abstract
A kind of washing process for the high high high spoil coal of mud of ash, targetedly sorted for the high high mud part of ash, greatly reduce the coal charge flow of whole separation system.Using floatation at different velocity, rich coal water and meager coal water are introduced, makes one-level flotation efficiently, quickly；Comprehensively, thoroughly, the recovery coal of maximum limit, minimum degree reduces ash and influence of the mud to coal flotation to secondary floatation.And mineral intergrowth depth is dissociated using the method for spiral chute and closed circuit grinding, further separates plaster and coal.Particle arrangement control is carried out to the selected black water of water-only cyclone using cloth helix tube, cyclone is discharged solid as far as possible, reduces the sorting pressure to follow-up equipment.
Description
The present invention is a kind of divisional application of patent of invention " washing process for the high high high spoil coal of mud of ash ", original application
The applying date be on March 10th, 2014, the application number of original application is 2014100848913, and the invention and created name of original application is
A kind of " washing process for the high high high spoil coal of mud of ash.
Technical field
The present invention relates to the sorting process of coal slime, the grder man of the difficult separation coal mud of the high high high spoil of mud of ash is especially adapted for use in
Skill.
Background technology
As China exploits to a large amount of excess loads of coal for many years, high-quality coal resource get up it is fewer, it is difficult In the view of in the past
The poor colliery of the difficult recovery of exploitation has high grey, high mud, high spoil mostly into the mineral resources for having to face, these poor collieries now
The several respects such as rate, washability difference.The fine coal content increase of -200 purposes is wherein particularly, causes floatation clean coal often due to height
The entrainment of grey thin mud and ash content is higher, coarse granule intergrowth also produces interference to floatation process, the ash contents of intergrowth mineral typically with
Coal ash approaches, and ratio accounts for 20% of raw coal or so, and adhesion body portion then pollutes cleaned coal, intergrowth as entered cleaned coal part
If part is not reclaimed, into tail coal part, then make it that tail coal part is relatively low, so thin mud pollution and the sorting of intergrowth mineral
The flotation process that problem has turned into the key factor routine for seriously restricting final head coal product quality is to pass through floatation feed
Flotation column is sent into after the processing of ore pulp preprocessor（Or flotation device）, flotation column（Or flotation device）Concentrate and tailings is sub-elected, is gone forward side by side
Enter respective subsequent product processing operation.The technique is primarily adapted for use in the sorting of conventional easily coal separation mud, is widely used in China, but
For the high high high spoil difficult separation coal mud of mud of ash, there is the defects of product recovery rate and low production efficiency in the technique, it is difficult to solve height
Grey thin mud entrainment and the influence of intergrowth Mineral pairs floatation process, therefore develop efficiently dividing for the high grey high spoil rate of difficult separation coal mud of adaptation
The key technology of choosing has turned into a problem of urgent need to resolve during coal resources efficient clean utilization.
The content of the invention
The washing process for the high high high spoil coal of mud of ash in the present invention, raw coal is first selected in air dense medium coal picker and carried
Preceding throwing spoil, enter back into three-product HM cyclone and obtain coarse-fine coal, slightly middle coal, thick spoil, coarse-fine coal enter de-mediated dewatering screen
Coarse granule cleaned coal is obtained, thick spoil obtains spoil into de-mediated dewatering screen, and thick middle coal carries out gravity treatment and flotation obtains fine grained essence
Coal, fine cleaned coal and coal slime.
More preferably, coarse-fine coal enters de-mediated dewatering screen, and the compass screen surface of de-mediated dewatering screen is divided into three parts, and coarse-fine coal is from de-mediated
Out rear oversize turns into coarse granule cleaned coal to dewatering screen, and coarse-fine coal is qualified medium in the screenings that compass screen surface Part I is deviate from,
Qualified medium, which is directly entered, closes Jie's bucket, and Water spray, Part II are carried out to coarse-fine coal in the Part II and Part III of compass screen surface
The screenings taken off selects dense media into magnetic separator, and the screenings that Part III is taken off enters the coal that centrifuge selects bulky grain
Coarse granule cleaned coal is incorporated to afterwards, and the black water that centrifuge and magnetic separator are selected carries out subsequent treatment as rich coal water.
More preferably, thick spoil enters de-mediated dewatering screen, and from de-mediated dewatering screen, out rear oversize turns into spoil to thick spoil,
Thick spoil compass screen surface Part I deviate from for qualified medium, qualified medium is directly entered conjunction Jie's bucket, in the Part II of compass screen surface
And Part III, Water spray is carried out to thick spoil, the screenings that Part II is taken off selects dense media into magnetic separator, the 3rd
Divide the screenings taken off to select bulky grain into centrifuge to be more preferably, thick middle coal is further carried out dense medium sorting and obtains weight
Two kinds of products, light product is after being dehydrated de-mediated, and obtained qualified medium enters qualified medium bucket, obtained fine grained cleaned coal conduct
Final products；Weight product obtains qualified medium and enters qualified medium bucket, obtained fine grained spoil is as cash after being dehydrated de-mediated
Stone, the black water deviate from from two kinds of products of weight are mixed into flotation flowsheet.
More preferably, described flotation flowsheet includes the middling speed in the fast-flotation and middling speed flotation column in fast-flotation post
Flotation, rich coal water enters fast-flotation post, and meager coal water enters middling speed flotation column, and ultrasonic oscillation is used in middling speed flotation column
Structure, makes the ash of high concentration and mud leaves the surface of coal, and the foam of fast-flotation and middling speed flotation is as fine cleaned coal, middling speed flotation
Mine tailing enters spiral chute in post, and spiral chute elects big granularity mineral intergrowth, and into closed circuit grinding, middling speed is returned after ore grinding
Flotation column, the black water rich in ash and mud that spiral chute sub-elects enter charging pump.
More preferably, the black water forced feed cloth helix tube that charging pump sub-elects spiral chute, cloth helix tube
Outlet be connected with the feeding mouth of water-only cyclone, and inner periphery tube wall and the water-only cyclone pan feeding of cloth helix tube outlet
The excircle tube wall of mouth connects, excircle tube wall and the close center of circle side of water-only cyclone feeding mouth of the outlet of cloth helix tube
Tube wall connects.
More preferably, the underflow of water-only cyclone enters high frequency shale shaker, and the screenings of high frequency shale shaker enters thickener,
Thickener is followed by filter press, and the recirculated water of filter press production is reused；The overflow of water-only cyclone enters thickener, high frequency vibrating
The solid that the oversize and filter press of dynamic sieve sub-elect is coal slime.
Beneficial effect：
1）The present invention uses air dense medium coal picker, not only throws in advance except part spoil prevents it from being increased into follow-up process
The sorting pressure of rear portion equipment, also without the use for introducing water, not only water-saving and emission-reducing, dense medium cyclone is not below influenceed also
Sorting；
2）Further sorting is carried out targetedly to thick middle coal, i.e., targetedly sorted for the high mud part of height ash,
Greatly reduce the coal charge flow of whole separation system.Using floatation at different velocity, rich coal water and meager coal water are introduced, makes one-level flotation high
Imitate, be quick；Comprehensively, thoroughly, the recovery coal of maximum limit, minimum degree reduces the shadow of ash and mud to coal flotation to secondary floatation
Ring.And mineral intergrowth depth is dissociated using the method for spiral chute and closed circuit grinding, further separates plaster and coal.Use cloth
Expect that helix tube carries out particle arrangement control to the selected black water of water-only cyclone, cyclone is discharged solid as far as possible, subtract
Few sorting pressure to follow-up equipment.
To sum up, the technological process is reasonable, and small investment, power consumption is small, and operating cost is low.Compared with traditional sorting process, point
Select efficiency high, remarkable in economical benefits.
Brief description of the drawings
Fig. 1 is the process flow system figure of the present invention.
Fig. 2 is the cloth helix tube of the present invention and the front view of water-only cyclone.
Fig. 3 is Fig. 2 top view.
Embodiment
The implementation to the present invention is further described below in conjunction with the accompanying drawings：
As shown in figure 1, raw coal is selected in into air dense medium coal picker, air dense medium coal picker is dry type coal picker, and it is used
Air auto-monitor dry separation, coal picker are mainly made up of the part such as air chamber, air distribution plate, scraping plate conveying device.Thing
Material（Raw coal）Assorting room in separator is：100 13mm grades raw coal after screening add respectively simultaneously with dense media
Enter in separator.Body input bottom air chamber of calming the anger with certain speed, stepless action is in dense media, shape after air distribution plate
Into the uniform and stable gas-solid fluidisation suspended substance with certain density.According to Archimedes' principle, light-heavy material is in suspended substance
In press density stratification, light thing floats, weight sinks.The material of layering is inversely discharged by scraping plate conveying device from bed body respectively,
Qualified weight product can be obtained after de-mediated.Discharge spoil in advance that can be tentatively using air dense medium coal picker, is prevented
Spoil largely enters follow-up process.The selected raw coal water content of air dense medium method requirement is low, and otherwise selected raw coal will be cloth wind
The wind distributing hole of plate blocks.Therefore, if feed coal water content is too high, such as the coal that is produced from southern colliery, in air inlet weight
Need to carry out high wind drying before Jie's coal picker or spontaneously dry.
The spoil that air dense medium coal picker is selected directly is abandoned, and the qualified coal selected enters three-product HM cyclone,
Coal in use feeds cyclone apex by the central tube deadweight of three-product HM cyclone, and heavy-media suspension is tangentially pumped into
Cyclone upper end.With a kind of suspension of low-density, three kinds of coarse-fine coal, thick middle coal and thick spoil products can be selected simultaneously.Air
Dense-medium separation machine, not only throw except part spoil prevents it from entering the sorting pressure of follow-up process enlarged rear portion equipment, do not have in advance also
There is the use for introducing water, not only water-saving and emission-reducing, does not influence the sorting of dense medium cyclone below also, if revolved in three products' dense-media
Wet split is used before stream device, coal charge will contain quite a few moisture content, and can dilute dense media when dense media separates hangs
Supernatant liquid, because the moisture content of coal charge in wet split is uncontrollable, therefore the sorting of heavy medium cyclone can also be greatly affected.
Coarse-fine coal enters de-mediated dewatering screen, and the compass screen surface of de-mediated dewatering screen can be divided into three parts, and coarse-fine coal is from de-mediated dewatering screen
Turn into coarse granule cleaned coal after out, coarse-fine coal is directly entered conjunction what compass screen surface Part I was deviate from for qualified medium, qualified medium
Jie's bucket, in the Part II and Part III of compass screen surface, Water spray is carried out to coarse-fine coal, the screenings that Part II is taken off enters magnetic
Machine is selected to select dense media, the screenings that Part III is taken off, which enters after centrifuge selects the coal of bulky grain, is incorporated to coarse granule essence
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, and thick spoil turns into spoil after being come out from de-mediated dewatering screen, and thick spoil is in compass screen surface
Part I abjection for qualified medium, qualified medium, which is directly entered, closes Jie's bucket, right in the Part II and Part III of compass screen surface
Thick spoil carries out Water spray, and the screenings that Part II is taken off selects dense media into magnetic separator, under the sieve that Part III is taken off
Thing, which enters after centrifuge selects the spoil of bulky grain, is incorporated to spoil.The black water that centrifuge and magnetic separator are selected is as meager coal water
Carry out subsequent treatment.
As the washing of the high high high spoil coal of mud of ash, difficulty it is maximum be processing to thick middle coal, in the prior art, also have
Middle coal is directly subjected to dehydration de-mediated, then sold as low-quality coal, this undoubtedly greatly reduces the economic benefit of coal.
In the present embodiment, coal in thick is further subjected to dense medium sorting, segments out two kinds of products of weight, light product after being dehydrated de-mediated,
Obtain qualified medium and enter qualified medium bucket, obtained thin cleaned coal is closed as final products, weight product after being dehydrated de-mediated
Lattice medium enters qualified medium bucket, and obtained particulate spoil is as spoil.The black water mixing deviate from from two kinds of products of weight
Into flotation flowsheet.
Flotation flowsheet includes the middling speed flotation in fast-flotation and middling speed flotation column in fast-flotation post, using this point
The flow of fast flotation is because for the high high high spoil coal of mud of ash after discharge spoil substantially, high ash and mud are still mixed in one with coal
Rise, if using one-level flotation column, be difficult to float in the later stage coal grain of flotation flowsheet, flotation efficiency is low, and the rate of recovery is low.It is described
Rich coal water enter fast-flotation post, further improve the content of coal, and meager coal water further dilutes coal into middling speed flotation column
Content, the grade gap for entering coal separation of two-stage flotation is so further widened, flotation agent is used according to these gaps are specifically chosen.
Ultrasonic oscillation structure is used in middling speed flotation column, the ash and mud for making high concentration leave the surface of coal, so make coal easily with
The collecting agent of flotation, which combines, to float.Secondary floatation system not only increases efficiency of separation sorting quality, also a saving medication.It is quick floating
The foam of choosing and middling speed flotation is as fine cleaned coal, and mine tailing enters spiral chute in flotation column, and spiral chute is by the symbiosis of big granularity
Ore deposit is elected, and into closed circuit grinding, middling speed flotation column, because the effect of ore grinding dissociates mineral intergrowth, coal grain table are returned after ore grinding
Show out, therefore can be combined with flotation agent, and the ash of symbiosis or mud are then discharged again into mine tailing therewith.Spiral chute
The black water rich in ash and mud sub-elected enters charging pump.
Referring to Fig. 2,3, charging pump（It is not shown）The black water forced feed cloth helix tube 1 that spiral chute is sub-elected,
Black water is due to the centrifugal motion in cloth helix tube, the outside circumference vessel wall motion of coarse granule, in the outlet of cloth helix tube
Enrichment coarse granule mine tailing at excircle tube wall is close on the section at place, 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 water-only cyclone feeding mouth
Excircle tube wall connect, the excircle tube wall of cloth helix tube and the tube wall phase of the close center of circle side of water-only cyclone feeding mouth
Connect, so, after mine tailing enters water-only cyclone, the inwall of coarse granule to water-only cyclone sorting chamber moves, and is migrated in coarse granule
In traverse, motion of the fine grained to overflow pipe is prevented, i.e. coarse granule is pushed fine grained the inwall of sorting chamber to and arranged from underflow
Go out, the solids content being so mingled with from the water of overflow pipe outflow greatly reduces.Reason for this is that wish as far as possible by tail
The solid of ore deposit sorts out, whether moderate particle as fine particle or silt particle as ash, therefore, even if black water
The granularity of middle particle is uneven, but by the pretreatment of cloth helix tube, is discharged substantially through water-only cyclone.If without cloth spiral shell
The pretreatment of coil, the tiny ash in black water largely will go out to run out of from overfall, aggravate 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, thickener
Filter press is followed by, the recirculated water of filter press production is reused.The overflow of water-only cyclone enters thickener, high frequency shale shaker
The solid that oversize and filter press sub-elect is coal slime.
So, after overall sorting flow, coarse granule cleaned coal, fine grained cleaned coal, fine cleaned coal, coal slime and spoil are sub-elected,
The effective influence for eliminating high grey and high coal and spoil composition to readymade coal.
Although a kind of washing process of the disclosed high high spoil coal of the high mud of ash being related to is carried out especially with reference to embodiment
Description, embodiments described above are illustrative and not restrictive, without departing from the present invention, are owned
Change and modifications all within protection scope of the present invention.
Claims (2)
1. a kind of washing process for the high high high spoil coal of mud of ash,
1）Raw coal is first selected in air dense medium coal picker and throws spoil in advance, three-product HM cyclone is entered back into and obtains coarse-fine coal,
Coal in thick, thick spoil, coarse-fine coal obtain coarse granule cleaned coal into de-mediated dewatering screen, and thick spoil obtains cash into de-mediated dewatering screen
Stone, thick middle coal carries out gravity treatment and flotation obtains fine grained cleaned coal, fine cleaned coal and coal slime；
Coarse-fine coal enters de-mediated dewatering screen, and the compass screen surface of de-mediated dewatering screen is divided into three parts, and coarse-fine coal is after de-mediated dewatering screen comes out
Oversize turns into coarse granule cleaned coal, and coarse-fine coal is qualified medium in the screenings that compass screen surface Part I is deviate from, and qualified medium is direct
Into Jie's bucket is closed, Water spray, the screenings that Part II is taken off are carried out to coarse-fine coal in the Part II and Part III of compass screen surface
Dense media is selected into magnetic separator, the screenings that Part III is taken off, which enters after centrifuge selects the coal of bulky grain, is incorporated to thick
Grain cleaned coal, the black water that centrifuge and magnetic separator are selected carry out subsequent treatment as rich coal water；
Thick spoil enters de-mediated dewatering screen, and from de-mediated dewatering screen, out rear oversize turns into spoil to thick spoil, and thick spoil is in compass screen surface
Part I abjection for qualified medium, qualified medium, which is directly entered, closes Jie's bucket, right in the Part II and Part III of compass screen surface
Thick spoil carries out Water spray, and the screenings that Part II is taken off selects dense media into magnetic separator, under the sieve that Part III is taken off
Thing, which enters after centrifuge selects the spoil of bulky grain, is incorporated to spoil, and the black water that centrifuge and magnetic separator are selected is as meager coal water
Carry out subsequent treatment；
Thick middle coal is further carried out dense medium sorting and obtains two kinds of products of weight, for light product after being dehydrated de-mediated, what is obtained is qualified
Medium enters qualified medium bucket, and obtained fine grained cleaned coal is as final products；Weight product obtains qualified Jie after being dehydrated de-mediated
Matter enters qualified medium bucket, and as spoil, the black water deviate from from two kinds of products of weight is mixed into obtained fine grained spoil
Enter flotation flowsheet；
2）Described flotation flowsheet includes the middling speed flotation in fast-flotation and middling speed flotation column in fast-flotation post, Fu Meishui
Into fast-flotation post, and meager coal water enters middling speed flotation column, and ultrasonic oscillation structure is used in middling speed flotation column, is made highly concentrated
Ash and the mud of degree leave the surface of coal, and the foam of fast-flotation and middling speed flotation is as fine cleaned coal；
3）Mine tailing enters spiral chute in middling speed flotation column, and spiral chute elects big granularity mineral intergrowth, into closed circuit grinding,
Middling speed flotation column is returned after ore grinding；
4）Spiral chute elects big granularity mineral intergrowth, and into closed circuit grinding, middling speed flotation column, spiral chute are returned after ore grinding
The black water rich in ash and mud sub-elected enters charging pump；
5）The black water forced feed cloth helix tube that charging pump sub-elects spiral chute, outlet and the water of cloth helix tube are situated between
The feeding mouth of cyclone is connected, and the excircle pipe of the inner periphery tube wall and water-only cyclone feeding mouth of cloth helix tube outlet
Wall connects, and the excircle tube wall of cloth helix tube outlet connects with the tube wall of the close center of circle side of water-only cyclone feeding mouth.
2. the washing process according to claim 1 for the high high high spoil coal of mud of ash, it is characterised in that：Step 5）In,
The underflow of water-only cyclone enters high frequency shale shaker, and the screenings of high frequency shale shaker enters thickener, and thickener is followed by filter press,
The recirculated water of filter press production is reused；The overflow of water-only cyclone enters thickener, the oversize and pressure of high frequency shale shaker
The solid that filter sub-elects is coal slime.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510625364.3A CN105170306B (en) | 2014-03-10 | 2014-03-10 | A kind of washing process for the high high high spoil coal of mud of ash |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510625364.3A CN105170306B (en) | 2014-03-10 | 2014-03-10 | A kind of washing process for the high high high spoil coal of mud of ash |
| CN201410084891.3A CN103785530B (en) | 2014-03-10 | 2014-03-10 | A kind of washing process for the grey high mud height spoil coal of height |
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| CN201410084891.3A Division CN103785530B (en) | 2014-03-10 | 2014-03-10 | A kind of washing process for the grey high mud height spoil coal of height |
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| CN201510625411.4A Active CN105126994B (en) | 2014-03-10 | 2014-03-10 | A kind of washing appliance for the high high high spoil coal of mud of ash |
| CN201510625364.3A Active CN105170306B (en) | 2014-03-10 | 2014-03-10 | A kind of washing process for the high high high spoil coal of mud of ash |
| CN201510625366.2A Active CN105344462B (en) | 2014-03-10 | 2014-03-10 | A kind of washing process for the high high high spoil coal of mud of ash |
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| CN201510625411.4A Active CN105126994B (en) | 2014-03-10 | 2014-03-10 | A kind of washing appliance for the high high high spoil coal of mud of ash |
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| CN103934098A (en) * | 2014-05-15 | 2014-07-23 | 华东理工大学 | High-carbon pulverized coal ash/coal slag decarbonization and classification method and device |
| CN104148164B (en) * | 2014-07-04 | 2016-09-21 | 中国海洋石油总公司 | A kind of method utilizing carbon dioxide to carry out coal washing |
| CN109701732B (en) * | 2019-01-14 | 2020-09-08 | 乌拉特中旗毅腾矿业有限责任公司 | Clean utilization production method of clean coal |
| CN110193421B (en) * | 2019-06-13 | 2021-04-20 | 华北理工大学 | Coarse slime beneficiation process adopting gravity-flotation combined separation |
| CN111185299B (en) * | 2020-03-09 | 2022-08-05 | 四川绿矿环保科技有限公司 | Production process method for recycling coal gangue |
| CN113522515A (en) * | 2021-06-17 | 2021-10-22 | 中国矿业大学 | Coal refloating process in high-ash difficult-separation coal slime |
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Also Published As
| Publication number | Publication date |
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| CN103785530B (en) | 2016-01-20 |
| CN105126994A (en) | 2015-12-09 |
| CN103785530A (en) | 2014-05-14 |
| CN105170306A (en) | 2015-12-23 |
| CN105126994B (en) | 2017-12-19 |
| CN105344462B (en) | 2017-12-19 |
| CN105344462A (en) | 2016-02-24 |
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