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Process for sorting coarse coal slime by utilizing heavy medium liquid-solid fluidized bed

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CN102211054A
CN102211054A CN 201110141345 CN201110141345A CN102211054A CN 102211054 A CN102211054 A CN 102211054A CN 201110141345 CN201110141345 CN 201110141345 CN 201110141345 A CN201110141345 A CN 201110141345A CN 102211054 A CN102211054 A CN 102211054A
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medium
coarse
coal
slime
solid
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CN 201110141345
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Chinese (zh)
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CN102211054B (en )
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冉进财
刘炯天
李延锋
陈文刊
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中国矿业大学
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Abstract

The invention provides a process for sorting coarse coal slime by utilizing a heavy medium liquid-solid fluidized bed. The process provided by the invention comprises the following steps: pouring a dilute medium of screenings screened by a clean coal medium-removing and dewatering screen and a part of the medium in a current divider box into a coarse coal slime sorting feed barrel; introducing a medium in a heavy medium system into the feedings of a liquid-solid fluidized bed coarse coal slime sorter; after the feedings are sorted by the liquid-solid fluidized bed coarse coal slime sorter, adding a magnetic separator recovery medium into overflows and underflows, wherein the added heavy medium can be used for weakening the influence of granularity to interference settlement, and strengthening the effect for sorting materials according to density, so that the sorting precision of the liquid-solid fluidized bed coarse coal slime sorter within a wide grain range can be improved, and the recovery ratio of coarse clean coals is greatly improved on the premise of ensuring the ash content of the coarse clean coals; simultaneously, the grain processing range of the liquid-solid fluidized bed coarse coal slime sorter is expanded; and the processing capacity of reselection is improved, and the flotation cost is reduced.

Description

重介质液固流化床分选粗煤泥工艺 Liquid-solid fluidized dense medium separation process crude slime

技术领域 FIELD

[0001] 本发明涉及一种重介质液固流化床分选粗煤泥工艺,尤其适用于煤炭湿法分选工艺中的3-0. 25mm粗煤泥的降灰脱硫。 [0001] The present invention relates to a liquid-solid fluidized medium heavy crude slime sorting process, especially for process 3-0 coal wet separation. 25mm thick slime in ash and sulfur reduction.

背景技术 Background technique

[0002] 目前大多数选煤工艺采用不分级重选+粗煤泥分选+浮选相结合的工艺,粗煤泥根据国标GB/T7186-1998 —般指2mm_0. 25mm的煤粒,位于重选和浮选分选粒度界限(一般为0. 5mm)的附近,这部分煤泥一般采用煤泥重介旋流器、螺旋分选机和液固流化床粗煤泥分选机分选,采用煤泥重介旋流器分选粗煤泥时,受大直径旋流器的工作状况影响大,分选效果差,并且设备入料压力大,设备磨损严重。 [0002] Most PREPARATION reselection process using an unstaged + + Slime Separation combined flotation process, the crude slime according to GB GB / T7186-1998 - 2mm_0 25mm generally refers to coal particles, located in the heavy. selected from the flotation and separation limit particle size (typically to 0. 5mm) in the vicinity of, this part of the general slime slime heavy medium cyclone, spiral separator and liquid-solid fluidized bed of coarse slime separator sorting using slime heavy medium cyclone minutes and coarse slime, by the large diameter of the cyclone operating conditions affect large, poor separation, and pressure feed device, the device badly worn. 螺旋分选机分选粗煤泥时,分选密度高并且不可调,分选出精煤灰分高。 Spiral separator to separate coarse slime election, and high-density separation is not adjustable, high coal ash sorted. 液固流化床粗煤泥分选机依靠分选密度低并且可以控制调节, 对入料浓度要求一般不严格,动力消耗小的优势成为目前能够有效分选粗煤泥的设备之 Liquid-solid fluidized bed of coarse slime separator rely on separation of low density can be controlled and adjusted, the concentration of the feed is generally not strictly required, the advantage of small power consumption can be effectively become coarse slime sorting equipment

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[0003] 液固流化床粗煤泥分选机是一种利用上升水流使煤泥流态化,依托煤泥自身作为介质形成具有一定密度的床层,煤泥按照一定的干扰沉降速度实现分选。 [0003] liquid-solid fluidized bed of coarse slime separator so that the water is slime rises utilizing fluidizing, relying slime itself as a medium having a certain density is formed in the bed, according to some interference slime settling velocity achieved sorting. 干扰沉降速度与颗粒的粒度、密度性质有关,当窄粒级分选时,干扰沉降速度受粒度影响较小,床层密度稳定,物料按密度实现分选,分选精度高。 Interfering particle sedimentation velocity and size, the nature of the densities, when a narrow grain size sorting, sedimentation rate is less interference on grain size, the bed density stability, material density achieved by sorting, the sorting accuracy. 当宽粒级分选时,干扰沉降速度受粒度影响大,床层密度不稳定,物料不能严格按照密度分选,分选精度降低。 When the width of grain size sorting, sedimentation velocity interference influence by a large particle size, the bed density is unstable, not strictly in accordance with the density of the material sorting, the sorting accuracy. 生产实际中的一般液固流化流床粗煤分选工艺是重介分选工艺中的精煤磁选尾矿或与脱泥筛筛下物经过分级旋流器分级后进入液固流化床粗煤泥分选机,在该工艺中,分选机的分选上限是由重选工艺中的脱介筛和脱泥筛的筛孔决定的,分选下限是由分级旋流器决定的,由于分级旋流器的分级效率低,决定了该工艺的分选粒度范围比较宽。 Usually the actual production of liquid-solid fluidized bed coarse coal stream separation process of heavy medium separation coal tailings magnetic separation process or the desliming screen undersize was subjected to a cyclone classifier into the liquid-solid fluidized After fractionation the crude slime bed sorting machine, in this process, the upper limit selected from the partial sorting machine is determined by screening sculping reselection process and desliming screen mesh, the lower limit is determined by the separation cyclone classifier due to the low classification efficiency cyclone classifier determines the particle size range of the sorting process is relatively wide. 在宽粒级分选过程中,高密度细颗粒会进入溢流污染精煤,低密度粗颗粒会进入底流成为尾煤,造成精煤回收率低,精煤灰分高,分选精度低,分选效果差,同时,由于液固流化床分选机在宽粒级分选效果差,导致重选的处理量受到限制,浮选的成本大。 Wide grain size sorting process, the high density of fine coal particles enter the overflow contamination, low density underflow coarse particles will enter the end of the coal becomes, resulting in low coal recovery, high ash content, low separation accuracy, points sorting effect is poor, while, since the liquid-solid fluidized-bed classifier in a wide grain size is limited separation is poor, resulting in an amount of reselection process, the cost of a large flotation.

[0004] 技术内容 [0004] technical content

技术问题:本发明的目的是克服已有技术中的不足之处,提供一种在分选3mm-0. 25mm 的粗煤泥时,精煤灰分低,分选精度高,分选效果好的重介质液固流化床分选粗煤泥工艺。 Technical problem: The purpose of the present invention is to overcome the shortcomings of the prior art, there is provided a sorting 3mm-0 for rough slime of 25mm, low ash content, high sorting precision, good separating effect. liquid-solid fluidized dense medium separation process crude slime.

[0005] 技术方案:本发明的重介质液固流化床分选粗煤泥工艺:包括对原煤进行脱泥或不脱泥,脱泥后原煤或不脱泥的原煤和介质桶中的介质进入三产品重介旋流器中进行分选,分选出的精煤、中煤和矸石分别进行脱介脱水,其中精煤进入精煤弧形筛进行预先脱介,预先脱介后的筛上混合物进入精煤脱介脱水筛脱介脱水,筛下物介质进入分流箱中分流,精煤脱介脱水筛筛上物的精煤进入精煤脱水设备脱水后排出,精煤脱介脱水筛筛下物的合格介质和分流箱中的一部分介质I一并进入合介桶; [0005] Technical Solution: liquid-solid fluidized dense medium of the present invention, the crude slime sorting process: raw coal including desliming or desliming desliming the coal or coal desliming medium and medium tub carried into the third heavy medium cyclone separation, sorted coal, coal and gangue sculping were dehydrated in which coal into the coal pre sculping curved screen, the screen beforehand sculping the mixture enters the coal dewatering screen sculping sculping dehydrated sieve was split into the medium tank shunt coal is discharged after dewatering sieve sculping the coal into the coal dewatering was dewatering equipment, coal dewatering screen sculping passing a portion of the medium I and the medium shunt tank undersize in together into the barrel via engagement;

所述的精煤脱介脱水筛筛下物的稀介质和分流箱中的另一部分介质II 一并进入粗煤泥分选入料桶;粗煤泥分选入料桶的煤介混合物进入分级旋流器中进行分级;经分级旋流器分级出的溢流细颗物料进入磁选机磁选,磁选机磁选后的精矿进入合介桶,磁选后的尾矿进入浮选设备浮选; Sculping said coal dewatering screen undersize dilute medium and another portion of the shunt tank II together into the medium Slime Separation into the drum; Slime Separation into the dielectric tank coal mixture into the classification classifying cyclone; fractionated by classifying cyclone overflow fine particles concentrate materials into the magnetic separator, magnetic separator into the barrel via engagement, after magnetic separation into the flotation tailings flotation devices;

经分级旋流器分级出的底流粗颗物料进入液固流化床粗煤泥分选机分选,液固流化床粗煤泥分选机分选出的溢流进入精煤磁选机磁选,磁选精矿进入合介桶,磁选尾矿经精煤煤泥分级脱水设备脱水,脱水后的精煤排出,精煤煤泥水进入浮选设备浮选; Fractionated by classifying cyclone underflow coarse particles into the liquid-solid fluidized bed material separator coarse slime separation, liquid-solid fluidized bed of coarse slime separator sorted into the overflow coal magnetic separator magnetic, magnetic concentrate into the barrel via engagement, coal slime tailings magnetic grading dehydration dewatering equipment, is discharged after dewatering coal, coal slime water into the flotation equipment flotation;

液固流化床粗煤泥分选机分选出的底流进入中煤磁选机磁选,磁选精矿进入合介桶, 磁选尾矿经中煤煤泥分级脱水设备脱水,脱水后的中煤排出,中煤煤泥水进入浓缩压滤设备进行浓缩压滤。 After liquid-solid fluidized bed of coarse slime separator sorted into the underflow coal magnetic separator, magnetic concentrate into the barrel via bonding, graded magnetic slime tailings dewatering coal dewatering equipment, dewatering the coal is discharged into the concentration of coal slime water filter press and concentrated pressure filtration device.

[0006] 有益效果:将精煤脱介脱水筛筛下物的稀介质和分流箱中的部分介质一并进入粗煤泥分选入料桶,通过在液固流化床粗煤泥分选机的入料中引入重介系统中的介质,经液固流化床分选后,相应在液固流化床粗煤泥分选机的溢流和底流增加磁选回收介质,由于加入的重介质削弱粒度对干扰沉降的影响,强化物料按密度分选作用,减少了高密度细颗粒和低密度粗颗粒的错配,可提高液固流化床粗煤泥分选机在宽粒级范围内的分选精度, 在保证粗精煤灰分的前提下,大大提高了粗精煤的回收率。 [0006] Advantageous Effects: The sculping coal dewatering screen undersize dilute medium and shunt tank into the part of the medium together with the crude slime bucket sorting, by liquid-solid fluidized bed in Slime Separation feed introduced into the machine HM system medium, after liquid-solid fluidized-bed classifier, a corresponding increase in the magnetic medium recovered liquid-solid fluidized bed of coarse slime separator overflow and underflow, due to the addition of Effect of media particle size on weight hindered settling weakening, strengthening the role of density separator material by reducing the mismatch of high density and low density of fine particles of the coarse particles, can improve the liquid-solid fluidized bed of coarse slime separator in a wide grain size sorting accuracy range, under the premise of ensure the ash content in coarse, greatly improving the recovery of coarse coal. 同时也延伸了液固流化床粗煤泥分选机的处理粒度范围,采用选前预脱泥时,可以增大脱泥筛的筛孔,提高脱泥效率和三产品重介旋流器的处理量,采用选前不脱泥时,可以增大脱介筛的筛缝,降低其介耗;液固流化床粗煤泥分选机对细颗粒的分选效果提高,可以降低浮选分选的有效分选粒度上限, 减少进入浮选的煤泥量,降低浮选成本。 Also extends liquid-solid fluidized bed of coarse slime sorter processing size range, when using pre-desliming before the election, desliming screen mesh can be increased to improve the efficiency and desliming three heavy medium cyclone the amount of processing, without using the pre-election desliming can be increased sculping sieve screen slit, which reduced medium consumption; liquid-solid fluidized bed separation effects coarse slime separator of fine particles increases, the float may be reduced selected sorting effective separation size limit, reducing the amount of slime into the flotation, flotation to reduce costs.

附图说明 BRIEF DESCRIPTION

[0007] 图1是本发明的工艺流程示意图。 [0007] FIG. 1 is a schematic process flow diagram of the present invention. 具体实施方式 detailed description

[0008] 下面结合附图对本发明的实施例作进一步的描述: [0008] The following embodiments in conjunction with the accompanying drawings of embodiments of the present invention are further described:

实施一、当原煤中粒度小于0. 5mm、含量低于20%时,无需对原煤1进行脱泥,其分选工艺步骤如下: One embodiment, when the raw coal particle size of less than 0. 5mm, content is less than 20%, of the coal without desliming 1, which separation process steps:

a.不脱泥的原煤和介质桶22中的介质一并进入三产品重介旋流器3中进行分选,分别选出精煤、中煤和矸石,分选出的中煤进入中煤脱介脱水设备4,分选的矸石进入矸石脱介脱水设备7 ; a. without desliming and medium coal bucket 22 together with the medium into the third heavy medium cyclone 3 were sorted were selected coal, coal and gangue, sorted into the coal in the coal sculping dehydration device 4, into the sorted waste rock gangue sculping dewatering equipment 7;

b.三产品重介旋流器3分选出的精煤进入精煤弧形筛5预先脱介,弧形筛5的筛上混合物进入精煤脱介脱水筛7脱介脱水,筛下物介质进入分流箱8中分流; b. three heavy medium cyclone coal 3 sorted into the coal pre sculping sieve bend 5, into the mixture of coal arcuate sieve 5 sculping 7 sculping dehydration dewatering screen, under the sieve 8 medium into the bypass diverter box;

c.精煤脱介脱水筛7的筛上物精煤经精煤脱水设备9脱水排出,.精煤脱介脱水筛7 的筛下物合格介质和分流箱8下的一部分介质I进入合介桶22内,精煤脱介脱水筛7的筛下物合格介质和分流箱8下的另一部分介质II进入粗煤泥分选入料桶10内; C. sculping coal dewatering screen on the screen (7) was discharged through the coal concentrate dewatering equipment 9 dehydration. sculping coal dewatering screen portion of the media passing under medium 8 and the shunt tank under the sieve 7 into the bonding medium I the inner tub 22, sculping coal dewatering screen undersize 7 qualified medium tank and another portion of the shunt 8 under the medium sorter II enter into coarse slime bucket 10;

d.粗煤泥分选入料桶10内的煤介混合物经过泵输送到分级旋流器11中进行分级; . D Slime Separation into the tank 10 a mixture of coal in the medium conveyed through the pump to the classifier classifying cyclone 11;

f.分级旋流器11分级溢流出的细颗粒进入磁选机15磁选,磁选出的精矿进入合介桶22,磁选出的尾矿进入浮选设备21浮选; . F classifier classifying cyclone 11 fine particle overflow into the magnetic separator 15, the magnetic bonding medium enters the selected concentrate tub 22, 21 into the magnetic selected Flotation tailings apparatus;

g.分级旋流器11分级溢流出的细颗粒进入液固流化床粗煤泥分选机12分选以后,在干扰沉降作用下,低密度颗粒上升成为溢流,进入精煤磁选机14中磁选,精煤磁选机14的磁选精矿流回合介桶22内,磁选尾矿进入精煤煤泥分级脱水设备17脱水后排出精煤20,脱水后的精煤煤泥水进入浮选设备21中浮选; After g. Classifier classifying cyclone 11 fine particle overflow into the liquid-solid fluidized bed of coarse slime separator 12 sorting, sedimentation under interference, increased density particles become overflowing into the coal magnetic separator discharge 20, after dewatering coal slime in the water separator 14 after the coal, coal magnetic separator 22, entering the magnetic separator tailings grade coal slime dehydration dewatering apparatus 17 via magnetic concentrate flow round tub 14 into the flotation device flotation 21;

h.分级旋流器11分级底流中的细颗粒进入液固流化床粗煤泥分选机12分选以后, 在干扰沉降作用下,低密度颗粒沉降成为底流,进入中煤磁选机13中磁选,经中煤磁选机13磁选的尾矿流回到合介桶22,磁选尾矿进入中煤煤泥分级脱水设备16脱水后,排出中煤18,脱水后的中煤煤泥水进入浓缩压滤设备21中进行浓缩压滤。 h. After the cyclone classifier 11 in the classifying fine particles bottom stream into the liquid-solid fluidized bed of coarse slime separator 12 sorting, interference in the sedimentation, settling becomes underflow density particles into the coal separator 13 in magnetic separation, the coal tailings magnetic separator 13 flows back to the tub 22 via engagement, magnetic separation of coal tailings into the dewatering apparatus 16 after the dehydration grading slime, coal 18 is discharged, dehydrated coal Slurry water into the filter press 21 is concentrated pressure filtration apparatus was concentrated.

[0009] 实施二、当原煤中粒度小于0. 5mm、含量大于20%时,需对原煤1进行脱泥。 [0009] Embodiment 2, when the raw coal particle size of less than 0. 5mm, the content of more than 20%, the need for raw coal 1 desliming. 先将原煤1引入脱泥筛2中进行脱泥,脱泥后的筛上物原煤进入三产重介旋流器3进行分选,脱泥后的筛下物煤泥水进入粗煤泥分选入料桶10内;后续的工艺与实施一相同,省略。 Desliming performed first in a raw coal is introduced desliming screen 2, the sieve material coal into the tertiary desliming heavy medium cyclone 3 were sorted under the sieve desliming slime water enters Slime Separation into tank 10; and a subsequent process same embodiment, will be omitted.

Claims (1)

1. 一种重介质液固流化床粗煤泥分选工艺,包括对原煤(1)进行脱泥或不脱泥,脱泥后原煤或不脱泥的原煤和介质桶(22)中的介质一并进入三产品重介旋流器(3)中进行分选,分选出的精煤、中煤和矸石分别进行脱介脱水,其中精煤进入精煤弧形筛(¾进行预先脱介,预先脱介后的筛上混合物进入精煤脱介脱水筛(7)脱介脱水,筛下物介质进入分流箱(8)中分流,精煤脱介脱水筛(7)筛上物的精煤进入精煤脱水设备(9)脱水后排出,精煤脱介脱水筛(7)筛下物的合格介质和分流箱(8)中的一部分介质I 一并进入合介桶(22);其特征在于:所述的精煤脱介脱水筛(7)筛下物的稀介质和分流箱(8)中的另一部分介质II 一并进入粗煤泥分选入料桶(10);粗煤泥分选入料桶(10)的煤介混合物进入分级旋流器(11)中进行分级;经分级旋流器(11)分级出的溢流细颗物料进 A liquid-solid fluidized dense medium coarse slime separation process, coal comprising (1) or off the mud off the mud, after desliming or coal desliming and medium coal bucket (22) medium together into the three heavy medium cyclone sorting (3), sorted coal, coal and gangue sculping were dehydrated in which coal into the coal sieve bend (¾ pre de dielectric, the mixture enters the pre-sieve sculping sculping coal dewatering screen (7) sculping dehydrated under the sieve box to shunt the medium (8) in the shunt sculping coal dewatering screen (7) on the sieve was I part of the medium into the coal concentrate dewatering device (9) is discharged after dewatering, sculping coal dewatering screen (7) under the sieve qualified media and shunt tank (8) into the engagement collectively referred tub (22); characterized in that: the coal dewatering screen sculping dilute medium and shunt tank was lower (7) mesh (8) into the other part of the medium together with II slime separation into the tank (10); crude slime separator into the tank (10) via a coal mixture enters the cyclone classifier classifying (11); fractionated swirler (11) fractionated fine particles overflow the material feed 入磁选机(1¾磁选,磁选机(1¾磁选后的精矿进入合介桶(22),磁选后的尾矿进入浮选设备(21)浮选;经分级旋流器(11)分级出的底流粗颗物料进入液固流化床粗煤泥分选机(12)分选, 液固流化床粗煤泥分选机(12)分选出的溢流进入精煤磁选机(14)磁选,磁选精矿进入合介桶(22),磁选尾矿经精煤煤泥分级脱水设备(17)脱水,脱水后的精煤排出,精煤煤泥水进入浮选设备(21)浮选;液固流化床粗煤泥分选机(12)分选出的底流进入中煤磁选机(13)磁选,磁选精矿进入合介桶(22),磁选尾矿经中煤煤泥分级脱水设备(16)脱水,脱水后的中煤排出,中煤煤泥水进入浓缩压滤(19)设备进行浓缩压滤。 The separator (1¾ magnetic separator, magnetic separator (magnetic concentrate after 1¾ bonded into the dielectric barrel (22), into the flotation tailings after magnetic separation apparatus (21) flotation; fractionated swirler ( 11) grade the coarse particles underflow liquid-solid fluidized bed material into coarse slime separator (12) sorting, liquid-solid fluidized bed of coarse slime separator (12) sorted into the overflow coal separator (14) magnetic, magnetic concentrate into the bonding dielectric barrel (22), magnetic separator tailings grade coal slime dewatering equipment (17) dehydrated coal is discharged after dewatering, the water enters the coal slime flotation apparatus (21) flotation; liquid-solid fluidized bed of coarse slime separator (12) sorted into the underflow coal magnetic separator (13) magnetic, magnetic concentrate into the bonding dielectric barrel (22 ), magnetic separation tailings dewatering coal slime grading device (16) after dehydration dewatering coal is discharged into the concentration of coal slime water pressure filtration (19) pressure filtration apparatus was concentrated.
CN 201110141345 2011-05-30 2011-05-30 Process for sorting coarse coal slime by utilizing heavy medium liquid-solid fluidized bed CN102211054B (en)

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CN104785360A (en) * 2015-04-24 2015-07-22 中蓝连海设计研究院 Dense medium separation method for recycling coarse fraction apatite from magnetite tailings
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CN102489391A (en) * 2011-12-20 2012-06-13 重庆南桐矿业有限责任公司南桐选煤厂 High-sulfur power raw coal sorting process
CN103372495A (en) * 2012-04-13 2013-10-30 金易通科技(北京)股份有限公司 Coarse slime separating system and method
CN103372495B (en) * 2012-04-13 2015-09-23 金易通科技(北京)股份有限公司 A heavy slime sorting system and method for sorting
CN102794227B (en) * 2012-08-22 2015-12-09 山西晋城无烟煤矿业集团有限责任公司 Medium recovery method and device block gangue undersize
CN102794227A (en) * 2012-08-22 2012-11-28 山西晋城无烟煤矿业集团有限责任公司 Method and device for recovering block gangue screen undersize medium
CN102861663A (en) * 2012-10-08 2013-01-09 中国矿业大学 Breaking grinding dissociation and re-flotation two-stage recovery process of coal in scarce coking
CN102962122A (en) * 2012-12-03 2013-03-13 中国矿业大学 Deep preparation technology of coal for direct coal liquefacation
CN103170405A (en) * 2013-02-28 2013-06-26 宝钢集团新疆八一钢铁有限公司 Coal separation method for advanced dense medium cyclone technology
CN103143432A (en) * 2013-02-28 2013-06-12 中国矿业大学 Efficient crushing and three-section type screening method of coking coal gravity middings
CN103170405B (en) * 2013-02-28 2015-07-08 宝钢集团新疆八一钢铁有限公司 Coal separation method for advanced dense medium cyclone technology
CN103212479B (en) * 2013-05-02 2015-09-09 杨高灵 Tailings recycled using the method
CN103212479A (en) * 2013-05-02 2013-07-24 杨高灵 Tail coal recycling utilization
CN104722388A (en) * 2013-12-18 2015-06-24 深圳市华天顿能源环保技术有限公司 Method for recycling reduction coal from coal slime
CN104084293B (en) * 2014-07-29 2017-02-15 四川达竹煤电(集团)有限责任公司石板选煤发电厂 The crude slime heavy media separation and sorting process means
CN104084293A (en) * 2014-07-29 2014-10-08 四川达竹煤电(集团)有限责任公司石板选煤发电厂 Dense medium coarse slime sorting device and sorting process
CN104174481A (en) * 2014-08-27 2014-12-03 中国矿业大学(北京) Simplified shallow-slot dense medium coal separation method
CN104785360A (en) * 2015-04-24 2015-07-22 中蓝连海设计研究院 Dense medium separation method for recycling coarse fraction apatite from magnetite tailings
CN105126991A (en) * 2015-07-23 2015-12-09 金易通科技(北京)股份有限公司 Main washing technology of coal
CN105597915A (en) * 2016-03-11 2016-05-25 中煤科工集团唐山研究院有限公司 Wide-grain-grade double-dense-medium process for separating all coarse coal slime
CN106179719A (en) * 2016-05-14 2016-12-07 北京浩沃特矿业技术有限公司 Container combined modular heavy medium coal separation system
CN106179717A (en) * 2016-07-22 2016-12-07 中煤科工集团唐山研究院有限公司 Steam coal all-grade selected and simplified heavy medium separation process

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