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Publication numberCN102824955 B
Publication typeGrant
Application numberCN 201210336787
Publication date14 Aug 2013
Filing date13 Sep 2012
Priority date13 Sep 2012
Also published asCN102824955A
Publication number201210336787.X, CN 102824955 B, CN 102824955B, CN 201210336787, CN-B-102824955, CN102824955 B, CN102824955B, CN201210336787, CN201210336787.X
Inventors王飞跃, 张义顺, 马娇, 史长亮, 刘高杨, 王红阳, 蒋函元
Applicant河南理工大学
Export CitationBiBTeX, EndNote, RefMan
External Links: SIPO, Espacenet
Method for using refined coal magnetic separator tailings for flotation water-spraying foam removal
CN 102824955 B
Abstract  translated from Chinese
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 magnetic tail coal flotation process for defoaming water, which is for a period of overflow coal product features three product heavy medium cyclone, an improved method, namely is sorting - sculping - Media Recycling - flotation characteristics of coal used as anti-foaming magnetic tail water areas, making it suitable for three - product HM cyclone overflow section of coal products coal magnetic tail, especially a transformation for fines (-0.5mm) content is particularly high for its coal preparation plant magnetotail.
Claims(1)  translated from Chinese
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; 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。 1. A magnetic tail for coal flotation water defoaming method, wherein: the process steps of the method are as follows:. A lump of raw materials will ⑴ into three product heavy medium cyclone carried out After sorting, respectively coal ⑵, ⑶ coal and waste rock ⑷, the resulting coal gangue ⑷ ⑶ and have carried off the medium and dehydration links, were sent to the bunker and waste rock storage;. b from step a The coal ⑵ arc sculping sieve into a sculping, sieve material as acceptable medium, into the qualified medium barrel (6); sieve (5) linear vibratory medium sieve into a second off referral, under the screen before linear shaker 1/3 segments as acceptable medium, into the qualified medium barrel (6); two-thirds of the posterior segment linear vibrating screen is provided with a sprinkler system, under which two-thirds of the screen segment ⑶ medium was fed as a dilute magnetic separator, the oversize blocks of coal ⑴ after centrifugal dewatering machine dewatering coal into the warehouse; c from step b to dilute medium (8) is fed to the separator through. After magnetic separation, magnetic separation of concentrate fed to the shunt box shunt, which reduces the content of fine coal; coal magnetic separator tail ⑶ was fed to flotation systems; d will -0.5mm's. fine coal feeding (1Φ fed to flotation machine flotation step c of coal magnetic tail ⑶ used water from the flotation machine, in order to prevent the flow of coal mixed with foam, so in the form of water was foaming, so as not to affect subsequent transport and dewatering operations; flotation resulting coal (11) dehydrated fed into clean coal bunker, Tailings (12) through a filter press to become concentrated slime fed to the tail bunker.
Description  translated from Chinese

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

技术领域 Technical 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, coal specifically relates to a magnetic tail is used as anti-foaming water flotation method.

背景技术 Background

[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 of 991 560 000 000 t, about 70% in primary energy production and consumption structure, 84% of the coal used for steam coal direct combustion, this seed coal-dominated energy structure will not change for quite a long time in the future. 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 economic 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。 Gradually improve China's environmental regulations and standards, the 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 structure will not occur in the turning point change. 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 and cause environmental problems since, causing concern to my Government and people attach great importance to and surrounding countries. 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 on the environment and ensure the sustainable development of the national economy healthy, we must pursue 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 into a precursor 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, the most reliable, the lowest capital 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。 It can be removed by washing raw coal in coal gangue, lower sulfur and ash in coal, improve coal quality and increase the variety of coal product, to create conditions for the efficient use of coal, reduce coal pollution.

[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 a method of flotation separation of fine coal in coal preparation plant of universal application, mainly used for sorting 0.5mm below the 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] Separator tailings (hereinafter referred to as magnetic tail) refers to coal preparation plant after recovering magnetite by magnetic separator slime remaining water; coal separator tailings (hereinafter referred to as coal magnetic Last) refers to slime water for sieve material coal heavy medium selected by sculping sieve, and fed into the magnetic separator after the recovery of magnetite.

`[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] Shanxi Coking Group Co., Ltd. Sunshine coal preparation plant for a coal magnetotail is the first to make it into the coal bucket magnetic tail, and then pumped into the coal bucket to the magnetotail cyclone classifier cyclone overflow again fed into the flotation machine flotation, the specific process shown in Figure 1.

[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] In 2007 published a patent application number on the application 200610102141.X "Slime two-stage dewatering process," magnetic tail for coal is first sieved by vibrating curved screen, sieve was fed into the flotation machine re-election, the screen was fed to Centrifuge dewatering and further processing, the process shown in Figure 2.

[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] Lu'an Group Wangzhuang Coal Mine expansion is completed in 2009 by the 泰戈特 Group, which uses coal preparation technology for: 200~40mm using heavy medium shallow - slot; 40~1.0mm two-stage two products heavy medium cyclone separation; 1.0~0.25mm coarse slime slime sorting machine using TSS sorting; 0.25~O mm thin slime 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。 Where coal magnetic tail heavy medium shallow - slot grading machine is used as a coal classification screen (40_ opening) of water, heavy medium cyclone coal is used as a magnetic tail end of coal Desliming sieve (Imm sieve well) water.

[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] magnetotail coal treatment process described above, the Shanxi Coking Group Co., Ltd. Sunshine hierarchical cyclone for coal magnetic tail were graded, small particle size was fed to flotation machine flotation recover The fine coal; Patent Application No. 200610102141.X patents in the magnetotail for coal, it is fed to the vibrating curved screen, the sieve material is fed into the flotation machine flotation recovery; and Luan Group Wangzhuang Coal Preparation Plant is directly used as a sieve coal magnetic tail water, instead of the role 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] There are currently getting coal magnetotail treatment process commonly used, there are the following characteristics: ① coal magnetic tail first into a bucket of clean coal magnetic tail, a big bucket of coal magnetotail is located on the first floor, occupy a larger space, infrastructure investment costs are also high; ② the coal after classification device through the magnetotail, fine fraction is fed to flotation sorting system sorting, increases the load on flotation machine; ③ flotation anti-foaming spray machine you need to use recycled water, further increasing the follow-up of slime water dewatering process load.

发明内容 DISCLOSURE

[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] The present invention is targeted deficiencies of the prior art that exist and provide a magnetic tail can increase coal utilization efficiency, reduce power consumption and lower flotation costs of coal magnetic infrastructure investment Last used as a flotation defoaming method.

[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 present invention proposes a method to reduce the system's investment in infrastructure and plant investment, improve the reliability of the flotation system, reduce system power consumption, simplified 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 three products dense medium cyclone overflow section of coal characteristics of the product, a new coal flotation magnetic tail is used as anti-foaming spray method, namely the traditional coal handling magnetotail Process improvements to suit the characteristics of coal magnetotail three - product HM cyclone overflow section of coal products, especially for fine material (-0.5mm) content is particularly high for its fine preparation plant Coal magnetotail Plant.

[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 materials ⑴ into three - product HM cyclone sorting, respectively coal ⑵, coal and waste rock ⑶ ⑷, the resulting coal gangue ⑷ ⑶ and have carried sculping and dehydrated areas, were sent to the bunker and waste rock storage;

[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 from step a coal ⑵ arc sculping sieve into a sculping, sieve material as acceptable medium, into the qualified medium barrel (6); sieve (5) is fed 2/3 posterior segment is provided with a sprinkler of linear shaker; linear vibratory medium secondary sculping sieve, sieve material before linear shaker 1/3 segments as acceptable medium, into the qualified medium barrel (6) The sieve material is fed as a dilute medium ⑶ magnetic separator (due 2/3 posterior segment linear shaker adds water, the qualified media were diluted to obtain a dilute medium, this step is adding water operations belong sculping Conventional operating systems), physical block coal ⑴ after centrifugal dewatering machine dewatering sieve into clean coal bunker;

[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. On from step b dilute medium (8) is fed to a magnetic separator after the magnetic separation, magnetic separation of concentrate fed to the shunt box shunt (shunt box belonging magnetic shunt operating system normal operation), which reduces the content of fine coal; coal magnetotail magnetic separation ⑶ fed to flotation systems;

[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. The -0.5mm of fine coal feeding _ fed to flotation machine flotation step c of coal magnetic tail ⑶ used water from the flotation machine, in order to prevent coal stream mixed with foam, so the water was in the form of anti-foaming, so as not to affect subsequent transport and dewatering operations; flotation resulting coal (11) dehydrated fed into clean coal bunker, Tailings (12 ) through a filter press and concentrated (this step is a routine operation concentrate filter press belongs flotation tailings treatment) become slime is fed to the tail bunker.

[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 pay is not described sculping adding magnetite and add water and other process steps are conventional techniques of the system are not discussed here.

[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] The beneficial results of the present invention are as follows: [0021] 1. The present invention utilizes a hierarchical role of three - product HM cyclone overflow product to no longer require subsequent rating action on coal magnetotail.

[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 be used as a flotation coal magnetotail anti-foaming water, coal magnetic tail of the adoption of three products dense medium cyclone separation effect, to ensure that the coal fines in the magnetotail grade coal coal products are qualified by the overflow flotation machine eventually become dehydrated coal.

[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 present invention utilizes a magnetic separator to dilute medium segment magnetite 99.999% recovery, ensure the existence of a very small amount of magnetite in coal magnetotail; when the coal used as the magnetotail When the anti-foaming water mechanical flotation machine, because the density of the more fine-grained magnetite coal density, which will be a small amount of magnetite flotation machine underflow, and is not fed to the flotation machine pollution of the overflow of flotation concentrate products to ensure the quality of 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] The present invention defoaming water by flotation, played a cleaning effect, reducing the entrainment of fine mud, reduced ash coal 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] 5. The present invention reduces the coal magnetic transition piece and subsequent magnetic tail coal grading operations, reducing capital investment, which will help to maintain.

[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 will magnetotail coal flotation machine used instead of circulating water anti-foaming water, reducing the load on the follow-up of slime water treatment operations.

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 coal handling of magnetic tail flow chart.

[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 Application No. 200610102141.X approach disclosed a process flow diagram coal magnetotail.

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

[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 tail used as a coal flotation process flow diagram of anti-foaming water.

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 combination of [0031] The following examples of the present invention (Fig. 4) of the present invention is further described in detail.

[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 coal magnetotail present invention is used as anti-foaming water flotation method 4 is for three - product HM cyclone overflow section of coal product features an improved method, Sorting is a sculping a magnetic medium recovered a coal flotation tail is used as part of anti-foaming water (see Figure 4), making it suitable for three products dense medium cyclone overflow section of coal products coal Features magnetic tail, especially for fine material (-0.5mm) content is particularly high in the coal preparation plant of its magnetic tail.

[0033] 本发明工艺按下述步骤进行: [0033] The process of the invention is carried out as follows:

[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. Lump ⑴ feed fed to three - product HM cyclone sorting, respectively coal ⑵, coal and waste rock ⑶ ⑷, resulting in coal and waste rock ⑶ ⑷ after sculping and dehydrated areas, were sent to the bunker and waste rock storage;

[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 for coal from step a curved sculping ⑵ fed to a sculping sieve, sieve material as acceptable medium, into the qualified medium barrel (6); sieve (5) linear vibratory medium fed to screen off a second referral, under the screen before linear shaker 1/3 segments as acceptable medium is fed to qualified medium barrel (6); sieve 2/3 period after linear shaker next was a dilute medium (8) (since 2/3 posterior segment linear shaker adds water, the qualified media were diluted to obtain a dilute medium, this step of adding water below normal operating sculping operating system) fed into magnetic separator, sieve material block coal (7) after centrifugal dewatering machine dewatering into clean coal bunker; [0036] c from step b to dilute medium (8) is fed to a magnetic separator. After magnetic separation, magnetic separation of concentrate fed to the shunt box shunt, which reduces the content of fine coal (split box belonging magnetic shunt operating system normal operation); magnetic separation tailings (coal magnetotail ⑶) fed to flotation systems;

[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. The -0.5mm of fine coal feeding (1Φ fed to flotation machine flotation step c of coal magnetic tail ⑶ water from the flotation machine used to spray defoamed form of water, to prevent coal mixed with a lot of foam, affect subsequent operations; flotation resulting coal (11) dehydrated sent to clean coal bunker, Tailings (12) through a concentrated pressure filter (normal operation this step a filter press belongs to concentrate flotation tailings treatment) become slime is fed to the tail bunker.

[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 pay is not described sculping adding magnetite and add water and other process steps are conventional techniques of the system, this will no longer go into details.

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Classifications
International ClassificationB03B7/00
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