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Method for using refined coal magnetic separator tailings for flotation water-spraying foam removal

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CN102824955B
CN102824955B CN 201210336787 CN201210336787A CN102824955B CN 102824955 B CN102824955 B CN 102824955B CN 201210336787 CN201210336787 CN 201210336787 CN 201210336787 A CN201210336787 A CN 201210336787A CN 102824955 B CN102824955 B CN 102824955B
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water
refined
coal
removal
magnetic
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CN 201210336787
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CN102824955A (en )
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王飞跃
张义顺
马娇
史长亮
刘高杨
王红阳
蒋函元
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河南理工大学
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Abstract

本发明公开了一种将精煤磁尾用于浮选喷水消泡的方法,该方法是针对三产品重介质旋流器的一段溢流精煤产品的特点提出了一种改进方法,即为分选—脱介—介质回收—精煤磁尾用作浮选消泡喷水环节,使其适合三产品重介质旋流器的一段溢流精煤产品的精煤磁尾的特点,特别是适合细粒物料(-0.5mm)含量特别高的选煤厂对其精煤磁尾的技术改造。 The present invention discloses a method of coal flotation magnetic tail water used for defoaming, the proposed method is an improved method for the characteristics of three overflow the clean coal product dense medium cyclone period, i.e., the sorting method - sculping - medium recovery - end of the magnetic characteristics of coal is used as coal flotation tail magnetic part defoaming water, making it suitable for three products dense medium cyclone overflow period of coal products, especially suitable fines (-0.5 mm) transformation of its content is particularly high coal preparation plant magnetic tail.

Description

一种将精煤磁尾用于浮选喷水消泡的方法 A method of coal flotation tail magnetic defoaming water for

技术领域 FIELD

[0001] 本发明涉及一种选煤工艺方法,具体说是涉及一种精煤磁尾用作浮选喷水消泡方法。 [0001] The present invention relates to a process for coal preparation, particularly, to a magnetic coal flotation tail water is used as the defoaming method.

背景技术 Background technique

[0002] 中国是世界上最大的煤炭生产国和消费国,煤炭保有储量为9915.60亿t,在一次能源生产和消费构成中约占70%,其中84%的煤用作动力煤直接燃烧,这种以煤为主的能源结构今后相当长时期内不会改变。 [0002] China is the world's largest coal producer and consumer of coal reserves is 991 560 000 000 t, accounting for about 70% of primary energy production and consumption structure, in which 84% of the coal used as direct combustion of coal, which kind of coal-dominated energy structure will not change in the future quite a long time. 作为世界上最大的发展中国家,中国近20年来经济的持续高速发展,对能源的需求和消费迅速增加,由煤炭利用所引起的环境问题也越来越突出。 As the world's largest developing country, China nearly 20 years of sustained and rapid development, the rapid increase in energy demand and consumption, environmental problems caused by the use of coal has become increasingly prominent. 我国环保法规及其标准的逐步提高,未来的能源构成将会缓慢地向天然气、水电、核能等清洁能源倾斜,但在可预见的将来,煤炭在我国能源消费构成中的比例不会发生转折性变化。 Environmental regulations and standards gradually improve our future energy mix will slowly natural gas, hydropower, nuclear power and other clean energy tilt, but in the foreseeable future, the proportion of coal in China's energy consumption will not constitute a turning point occurred in Variety. 我国大量生产和消耗煤炭而引起起的环境问题,引起我国政府和人民的高度重视以及周边国家的关切。 Our mass production and consumption of coal causes environmental problems since, causing concern as well as neighboring countries attaches great importance to the Chinese government and people. 为了有效利用煤炭资源、减少燃煤对环境的污染,保证国民经济健康的可持续发展,必须推行洁净煤技术。 In order to effectively utilize coal resources, reduce coal pollution to the environment, ensure the sustainable development of the national economy healthy, it is necessary to implement clean coal technology. 洁净煤技术是以煤炭洗选为源头、以煤炭转化化为先导、以煤炭洁净燃烧和发电为核心的技术体系。 Clean coal technology as the source is coal washing, coal conversion as the Leader to clean coal combustion and power generation as the core technology system. 煤炭洗选技术是洁净煤技术中最成熟、最可靠,投资和运行成本最低的。 Coal washing technology for clean coal technology is the most mature, most reliable, low investment and operating costs. 通过煤炭洗选可以除去原煤中的矸石,降低煤中硫分和灰分,提高煤的质量和增加煤炭商品的品种,为有效利用煤炭、减少燃煤污染创造条件。 Can be removed by washing the coal in the coal gangue, reduced sulfur and ash in coal, the coal to improve the quality of coal and increasing the variety of goods, create conditions for the effective utilization of coal, coal pollution reduction.

[0003] 浮选作为细粒煤分选的方法,在选煤厂得到普遍的应用,主要用于分选0.5mm以下的细粒煤。 [0003] As the fine coal flotation separation process, the coal preparation plant widely applied mainly for sorting 0.5mm or less fine coal.

[0004] 磁选机尾矿(以下简称磁尾)是指在选煤厂经磁选机磁选回收磁铁矿之后所剩的煤泥水;精煤磁选机尾矿(以下简称精煤磁尾)则是指对于重介所选的精煤经脱介筛后的筛下物,送入到磁选机回收磁铁矿之后的煤泥水。 [0004] The separator tailings (hereinafter referred to as magnetic tail) by means of slime water separator after the magnetic separator magnetite recovery remaining in coal preparation plant; coal tailings magnetic separator (hereinafter referred to as magnetic coal tail) refers to slime water after the undersize coal heavy medium selected by sculping sieve, is fed to a magnetic separator magnetite recovery.

`[0005] 山西阳光焦化集团有限公司选煤一厂对于精煤磁尾则是先使其送入到精煤磁尾桶,然后用泵将精煤磁尾桶打入到分级旋流器中,旋流器的溢流送入到浮选机再次浮选,具体的工艺流程图如图1所示。 `[0005] Group Ltd. Shanxi Sunshine Coking coal preparation plant for a coal MAGNETOTAIL it is fed to the first end of the magnetic bucket coal and coal into the pump barrel magnetic tail to the cyclone classifier , the cyclone overflow is fed to a flotation machine flotation again, the specific flow chart shown in Fig.

[0006] 在2007年公布的一份申请号为200610102141.X的发明专利申请《精煤泥双段脱水工艺》上,对于精煤磁尾则是先通过振动弧形筛进行筛分,筛下物送入到浮选机进行再选,筛上物送入到沉降过滤式离心脱水机再进一步处理,工艺流程图如图2所示。 [0006] is carried out in a first Application No. 200610102141.X, published in 2007 as a patent application on a "two-stage dehydration process Slime" magnetic tail for coal by vibrating arcuate sieve, sieve was then fed to the flotation machine is selected, the screen was fed to a centrifugal settling filter dehydrator further processing flow chart shown in FIG.

[0007] 潞安集团王庄矿选煤厂2009年由泰戈特集团改扩建完成,其采用的选煤工艺为:200〜40mm采用重介浅槽分;40〜1.0mm采用两段两产品重介旋流器分选;1.0〜0.25mm粗煤泥采用TSS煤泥分选机分选;0.25〜O mm细煤泥采用浮选机分选。 [0007] Luan Group wangzhuang 2009 Coal Mine expansion By Taige Te Group, which uses coal preparation process is: 200~40mm points using heavy medium shallow groove; 40~1.0mm two-stage two products heavy medium cyclone separation; 1.0~0.25mm TSS using crude slime slime sorting machine sorting; 0.25~O mm fine Coal flotation machine sorting. 其中重介浅槽分选机的精煤磁尾用作了原煤分级筛(40_筛孔)的喷水,重介质旋流器的精煤磁尾用作了末原煤脱泥筛(Imm筛孔)的喷水。 Wherein the magnetic tail weight coal medium shallow groove sorter as the coal Sieve (mesh 40_) of water, coal MAGNETOTAIL heavy medium cyclone coal is used as the end desliming screen (sieve Imm, hole) of water spray.

[0008] 以上所述的精煤磁尾处理工艺中,山西阳光焦化集团有限责任公司采用分级旋流器对精煤磁尾进行了分级,粒度小的送入到浮选机进行浮选回收其中的细粒煤;专利申请号为200610102141.X的发明专利中对于精煤磁尾,使其送入到振动弧形筛中,筛下物送入到浮选机进行浮选回收;而潞安集团王庄矿洗煤厂的则是直接将精煤磁尾用作筛子的喷水,代替了循环水的作用。 [0008] The above-described magnetic tail coal treatment process, Shanxi Sunshine Coking Group Co., Ltd. hierarchical swirler magnetic tail of coal were classified into a small particle size to be recovered by flotation flotation machine wherein coal fines; Patent application No. 200610102141.X Patent invention for coal in the magnetic tail, it is fed to the vibrating sieve bend, the undersize fraction is fed to a flotation machine flotation recovery; and Luan Group Wangzhuang coal Preparation Plant coal is directly used as the magnetic end of the water screen, instead of the effect of circulating water.

[0009]目前在得到普遍使用的精煤磁尾处理工艺,存在以下特点:①精煤磁尾先送入到一个精煤磁尾桶中,一个大的精煤磁尾桶所位于一楼,占用了较大的空间,基建投资成本也很大;②将精煤磁尾经过分级装置以后,细粒级的送入浮选选系统进行分选,增加了浮选机的负荷;③浮选机使用的消泡喷水需要使用循环水,进一步增加了后续的煤泥水脱水工艺的负荷。 [0009] In the currently obtained coal treatment process MAGNETOTAIL commonly used, the following characteristics: ① coal is fed to a first magnetic tail end of magnetic coal bucket, a large magnetic tail coal bucket is located on the first floor, occupy a relatively large space, a large capital investment costs; ② the coal through the magnetic tail after classifying means selected from the fine fraction into the flotation separation system, increases the load of the flotation machine; ③ flotation defoaming water machine requires the use of recycled water, further increasing the load on Coal Slurry subsequent dehydration process.

发明内容 SUMMARY

[0010] 本发明的目的正是针对上述现有技术中所存在的不足之处而提供的一种可提高精煤磁尾利用效率、减少浮选机功耗和降低基建投资成本的精煤磁尾用作浮选消泡方法。 [0010] A tail to improve magnetic efficiency coal, flotation reduces power consumption and lower capital investment cost coal magnetic object of the invention is for the above-described shortcomings of the prior art are provided in the present The defoaming method is used as a flotation tail.

[0011] 本发明所提出的方法,可以减少系统的投资和厂房的基建投资,提高了浮选系统的可靠性,降低系统消耗功率,简化管理和维护工作。 [0011] The method proposed by the present invention, it is possible to reduce investment in infrastructure investment and plant systems, improve the reliability of the flotation system, reducing the system power consumption, simplify the management and maintenance.

[0012] 本发明针对三产品重介质旋流器的一段溢流精煤产品的特点,提出了一种精煤磁尾用作浮选消泡喷水方法,即对传统的精煤磁尾处理工艺进行改进,使其适合三产品重介质旋流器的一段溢流精煤产品的精煤磁尾的特点,特别是适合细粒物料(-0.5mm)含量特别高的选煤厂对其精煤磁尾的技术改造。 [0012] The present invention is directed to the clean coal characteristics for some overflow of three product dense medium cyclone is proposed a magnetic tail water is used as a method of coal flotation defoaming, i.e. coal in conventional processing MAGNETOTAIL process to improve, so the end of the magnetic characteristics of coal products for three heavy medium cyclone coal product overflow period, is particularly suitable for fine material (-0.5 mm) particularly high content of fine coal preparation thereof technological transformation of coal magnetotail.

[0013] 本发明的目的可通过下述技术措施来实现: [0013] The object of the present invention can be achieved by the following technical measures:

[0014] 本发明的工艺步骤如下: [0014] The process steps of the present invention are as follows:

[0015] a.将块煤原料⑴送入三产品重介质旋流器中进行分选,分别得到精煤⑵、中煤⑶和矸石⑷,将得到的中煤⑶和矸石⑷都进行脱介和脱水环节后,分别送入中煤仓和矸石仓; [0015] a. The lump material into three product ⑴ heavy medium cyclone in sorting, respectively coal ⑵, coal and gangue ⑶ ⑷, the obtained coal and gangue ⑶ ⑷ are mediated deprotection after dehydration and links, respectively, into the coal and waste rock storage bin;

[0016] b.将来自步骤a中的精煤⑵送入弧形脱介筛进行一次脱介,筛下物作为合格介质,送入合格介质桶(6);筛上物(5)送入直线振动脱介筛进行二次脱介,直线振动筛前1/3段的筛下物作为合格介质,送入合格介质桶(6);设置有喷水装置的直线振动筛后2/3段的筛下物作为稀介质⑶送入磁选机(由于在直线振动筛的后2/3段添加了喷水,将合格介质进行了稀释,得到了稀介质,这一步加水的操作属于脱介系统的常规操作),筛上物块精煤⑴经过离心脱水机脱水后送入精煤仓; . [0016] b ⑵ the coal fed from step a in a curved sieve sculping sculping, under the sieve as acceptable medium, medium passing into the tub (6); sieve (5) is fed after two-thirds section is provided with a sprinkler linear shaker; linear vibratory screen via the secondary sculping 1/3 period before the linear vibration sieve was qualified as a medium, the medium passing into the tub (6) the magnetic separator was fed undersize (due to the linear shaker segment 2/3 is added water, passing the dilution medium to obtain a diluted medium as a dilute medium ⑶, which belongs to the operating step of adding water sculping conventional operating system), the oversize coal block ⑴ after centrifugal dewatering machine dewatering coal into the cartridge;

[0017] c.对来自步骤b中的稀介质(8)送入到磁选机经过磁选后,磁选得到的精矿送入到分流箱进行分流(分流箱分流操作属于磁选系统的常规操作),降低其中的细粒煤泥含量;磁选得到的精煤磁尾⑶送入到浮选系统; [0017] c. From step b to a dilute medium (8) is fed to a concentrate separator after the magnetic separation, magnetic separation is fed to the shunt tank shunt (split case magnetic shunt operating system belonging to normal operation), reducing the content of fines therein slime; magnetic separation of coal fed into the magnetic flotation tail ⑶ system;

[0018] d.将-0.5mm的细粒煤入料_送入到浮选机中进行浮选,将来自步骤c中的精煤磁尾⑶用作浮选机的喷水,为了防止因精煤流中混杂有泡沫,故采用喷水的形式进行消泡,以免影响后续的输送和脱水作业;浮选得到的精煤(11)经过脱水处理送入到精煤仓,尾煤(12)经过浓缩一压滤(这一步浓缩一压滤属于浮选尾煤处理的常规操作)成为煤泥送入到尾煤仓。 [0018] d. -0.5mm of the fine coal feed is fed to the flotation machine _ flotation, magnetic coal from the end of step c ⑶ water is used as the flotation machine in order to prevent coal stream mixed with foam, so the use of water in the form of defoaming, transportation and so as not to affect the subsequent dewatering operation; obtained coal flotation (11) is fed to the dehydrated coal bin, coal tailings (12 ) through a filter press and concentrated (this step is a filter press and concentrated belonging to normal operation of flotation tailing processing) fed to the tail to become slime coal bin.

[0019] 在上述工艺步骤描述中,未描述的补水、脱介、添加磁铁矿以及添加清水等工艺步骤都是该系统的常规技术,在此不再赘述。 [0019] In the above-described process steps, the replenishment not described, sculping, add water and adding magnetite and other process steps are conventional techniques in the system, not described herein again.

[0020] 本发明的有益结果如下:[0021] 1.本发明利用三产品重介质旋流器对溢流产品的分级作用,不再需要后续的对精煤磁尾的分级作用。 [0020] Advantageous results of the invention are as follows: [0021] 1. The present invention makes use of a three hierarchical product dense medium cyclone overflow of the product, a classification operation is no longer necessary for the subsequent magnetic tail coal.

[0022] 2.本发明直接将精煤磁尾用作浮选消泡喷水,精煤磁尾由于通过了三产品重介质旋流器的分选作用,保证了精煤磁尾中细粒级的煤均为合格精煤产品,通过浮选机的溢流最终经过脱水成为精煤。 [0022] 2. The present invention is directed to a magnetic coal flotation tail is used as the defoaming water, since by the end of coal magnetic separator product of a three heavy medium cyclone to ensure that the coal fines in MAGNETOTAIL grade coal are qualified coal products, and ultimately become dehydrated by flooding coal flotation machine.

[0023] 3.本发明利用磁选机对稀介段磁铁矿高达99.999%的回收率,确保了在精煤磁尾中存在极少量的磁铁矿粉;当该精煤磁尾用作机械搅拌式浮选机的消泡水时,由于磁铁矿的密度较细粒煤密度大,这些少量的磁铁矿粉会成为浮选机的底流,而不会送入到浮选机的溢流污染浮选精煤产品,确保了浮选精煤的质量。 [0023] 3. The magnetic separator of the present invention utilizes dilute dielectric recovery period up to 99.999% of magnetite, ensures that there is very small amount of magnetite in the magnetic footer coal; coal when the magnetic tail as when the defoaming water mechanical flotation machine, due to the large magnetite fine coal density is the density, the amount of magnetite will be underflow of the flotation machine, and is not fed to the flotation machine pollution of the overflow flotation concentrate products to ensure the quality of the flotation concentrate.

[0024] 4.本发明通过浮选机消泡喷水,起到了清洗作用,减少了细泥的夹带,减低了精煤产品的灰分。 [0024] 4. The machine of the present invention, the defoaming water by flotation, played a role in cleaning, reducing the entrainment of fine mud, reducing coal ash product.

[0025] 5.本发明减少了精煤磁尾筒以及后续的精煤磁尾分级作业,降低了基建投资,利于维护。 [0025] The present invention reduces the coal end of the magnetic cylinder and the subsequent tail coal magnetic grading operations, reduced capital investment, conducive to maintenance.

[0026] 6.本发明将精煤磁尾代替循环水用作浮选机消泡喷水,减少了后续煤泥水处理作业的负荷。 [0026] 6. The present invention in place of the tail magnetic coal flotation machine circulating water is used as the defoaming water, reduces the load on the subsequent job slime water.

附图说明 BRIEF DESCRIPTION

[0027] 图1是山西阳光焦化选煤一厂的精煤磁尾的处理方式工艺流程图。 [0027] FIG. 1 is a Shanxi Sunshine Coking coal preparation plant of a coal treatment process in a magnetic tail in FIG.

[0028] 图2是申请号为200610102141.X所公开的精煤磁尾的处理办法工艺流程图。 [0028] FIG 2 is disclosed in Application No. 200610102141.X coal approaches the end of the magnetic flow chart.

[0029] 图3是本发明的整套工艺流程图。 [0029] FIG. 3 is a process flow diagram of the present invention is complete.

[0030] 图4是本发明工艺涉及到的精煤磁尾用作浮选消泡喷水的工艺流程图。 [0030] FIG. 4 is a process of the present invention relates to magnetic fine coal flotation tail defoaming water as a process flow diagram.

具体实施方式 detailed description

[0031] 本发明以下将结合实施例(附图4)对本发明做进一步的详述。 The following [0031] Example embodiments of the present invention will be binding (Fig. 4) further detailed description of the present invention.

[0032] 如图4所示,本发明的精煤磁尾用作浮选喷水消泡方法是针对三产品重介质旋流器的一段溢流精煤产品的特点提出了一种改进方法,即为分选一脱介一介质回收一精煤磁尾用作浮选消泡喷水环节(参见图4),使其适合三产品重介质旋流器的一段溢流精煤产品的精煤磁尾的特点,特别是适合细粒物料(-0.5mm)含量特别高的选煤厂对其精煤磁尾的技术改造。 [0032] As shown, the magnetic coal flotation tail water of the present invention as defoaming method 4 is the characteristic period of three overflow product heavy medium cyclone coal product is an improved method, that is, a sorting sculping a magnetic medium for recovery of coal flotation tail is used as part of a defoaming water (see FIG. 4), making it suitable for three products dense medium cyclone coal product overflow period of coal the magnetic characteristics of the end, especially for fine material (-0.5 mm) transformation of its content is particularly high coal preparation plant magnetic tail.

[0033] 本发明工艺按下述步骤进行: [0033] The process of the present invention by the following steps:

[0034] a.块煤入料⑴送入到三产品重介质旋流器中进行分选,分别得到精煤⑵、中煤⑶和矸石⑷,将得到的中煤⑶和矸石⑷经过脱介和脱水环节后,分别送入到中煤仓和矸石仓; [0034] a. ⑴ feed lump coal is fed to the three heavy medium cyclone in the product sorting, respectively coal ⑵, coal and gangue ⑶ ⑷, the obtained coal and gangue ⑶ ⑷ through sculping after dehydration and links, are fed into the coal and waste rock storage bin;

[0035] b.对来自步骤a中的精煤⑵送入到弧形脱介筛进行一次脱介,筛下物作为合格介质,送入到合格介质桶(6);筛上物(5)送入到直线振动脱介筛进行二次脱介,直线振动筛前1/3段的筛下物作为合格介质, 送入到合格介质桶(6);直线振动筛后2/3段的筛下物作为稀介质(8)(由于在直线振动筛的后2/3段添加了喷水,将合格介质进行了稀释,得到了稀介质,这一步加水的操作属于脱介系统的常规操作)送入到磁选机,筛上物块精煤(7)经过离心脱水机脱水后送入精煤仓;[0036] c.对来自步骤b中的稀介质(8)送入到磁选机经过磁选后,磁选得到的精矿送入到分流箱进行分流,降低其中的细粒煤泥含量(分流箱分流操作属于磁选系统的常规操作);磁选得到的尾矿(精煤磁尾⑶)送入到浮选系统; . [0035] b of the coal from step a ⑵ fed to a sieve arcuate sculping sculping, under the sieve as acceptable medium, fed into the tub qualified medium (6); sieve (5) is fed via the linear vibratory sieve sculping second, third straight section before the vibrating screen undersize as acceptable medium, fed into the tub qualified medium (6); 2/3 period after the sieve shaker linear was used as the dilute medium (8) (due to the linear section after adding 2/3 shaker water, passing the dilution medium, to give a dilute medium, this step of adding water are routine operations sculping operating system) fed into the magnetic separator, the oversize coal block (7) after centrifugal dewatering machine dewatering coal into the cartridge; [0036] c from step b to a dilute medium (8) is fed to a magnetic separator. after magnetic separation, magnetic separation of the concentrate fed to the shunt tank shunt, reducing the content of fine coal (conventional tank operation shunting operations belonging magnetic shunt system) therein; tailings (coal magnetic separator obtained mAGNETOTAIL ⑶) fed into the flotation system;

[0037] d.将-0.5mm的细粒煤入料(1Φ送入到浮选机中进行浮选,将来自步骤c中的精煤磁尾⑶用作浮选机的喷水,以喷水的形式进行消泡,防止因精煤夹杂有大量的泡沫,影响后续的作业;浮选得到的精煤(11)经过脱水处理送入到精煤仓,尾煤(12)经过浓缩一压滤(这一步浓缩一压滤属于浮选尾煤处理的常规操作)成为煤泥送入到尾煤仓。 [0037] d. -0.5mm of the fine coal feed (1Φ fed to the flotation machine flotation, magnetic coal from the step c ⑶ tail water flotation machine used to spray defoaming form of water, to prevent a large amount of coal mixed with a foam affect the subsequent operation; obtained coal flotation (11) is fed to the dehydrated coal bin, coal tailings (12) via a pressure concentrated It was filtered off (this step is a filter press and concentrated belonging to normal operation of flotation tailing processing) fed to the tail to become slime coal bin.

[0038] 在上述工艺步骤描述中,未描述的补水、脱介、添加磁铁矿以及添加清水等工艺步骤都是该系统的常规技术,在此·不再赘述。 [0038] In the above-described process steps, the replenishment not described, sculping, add water and adding magnetite and other process steps are conventional techniques in the system, this · omitted.

Claims (1)

1.一种将精煤磁尾用于浮选喷水消泡的方法,其特征在于:所述方法的工艺步骤如下: a.将块煤原料⑴送入三产品重介质旋流器中进行分选,分别得到精煤⑵、中煤⑶和矸石⑷,将得到的中煤⑶和矸石⑷都进行脱介和脱水环节后,分别送入中煤仓和矸石仓; b.将来自步骤a中的精煤⑵送入弧形脱介筛进行一次脱介,筛下物作为合格介质,送入合格介质桶(6);筛上物(5)送入直线振动脱介筛进行二次脱介,直线振动筛前1/3段的筛下物作为合格介质,送入合格介质桶(6);直线振动筛的后2/3段设置有喷水装置,该2/3段的筛下物作为稀介质⑶送入磁选机,筛上物块精煤⑴经过离心脱水机脱水后送入精煤仓; c.对来自步骤b中的稀介质(8)送入到磁选机经过磁选后,磁选得到的精矿送入到分流箱进行分流,降低其中的细粒煤泥含量;磁选得到的精煤磁尾⑶送入到浮选系统 1. A method for defoaming coal flotation magnetic tail water, characterized in that: the process steps of the method are as follows:. A lump the material into three product ⑴ heavy medium cyclone is performed after sorting, respectively coal ⑵, coal and gangue ⑶ ⑷, the obtained coal and gangue ⑶ ⑷ both dehydration and deprotection via links, respectively, into the coal and waste rock storage bin;. b from step a the coal fed into the arcuate ⑵ sculping sculping a sieve, the sieve was as acceptable medium, medium passing into the tub (6); sieve (5) is fed via linear vibratory sieve off the secondary dielectric, a front section of a third vibrating screen undersize as acceptable medium, medium passing into the tub (6); 2/3 period after the linear vibrating screen is provided with spray means, in this a sieve section 2/3 ⑶ medium was fed as a dilute magnetic separator, the oversize coal block ⑴ after centrifugal dewatering machine dewatering coal into the cartridge; C from step b to a dilute medium (8) is fed to a separator through. after magnetic separation, magnetic separation of the concentrate fed to the shunt tank shunt, reducing the content of fines therein slime; magnetic separation of coal fed into the magnetic end of the flotation system ⑶ d.将-0.5mm的细粒煤入料(1Φ送入到浮选机中进行浮选,将来自步骤c中的精煤磁尾⑶用作浮选机的喷水,为了防止因精煤流中混杂有泡沫,故采用喷水的形式进行消泡,以免影响后续的输送和脱水作业;浮选得到的精煤(11)经过脱水处理送入到精煤仓,尾煤(12)经过浓缩一压滤成为煤泥送入到尾煤仓。 d. Place the fine coal feed -0.5mm (1Φ fed to the flotation machine for flotation, from the end of the magnetic ⑶ coal is used as water in step c flotation machine, in order to prevent coal stream mixed with the foam, so the use of water in the form of defoaming, transportation and so as not to affect the subsequent dewatering operation; obtained coal flotation (11) is fed to the dehydrated coal bin, coal tailings (12) through Slurry into a filter press and concentrated to become Tailings bin.
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