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Dissociating, independent slurry mixing and bulk floatation process for fine grain middings

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CN104722389A
CN104722389A CN 201510092808 CN201510092808A CN104722389A CN 104722389 A CN104722389 A CN 104722389A CN 201510092808 CN201510092808 CN 201510092808 CN 201510092808 A CN201510092808 A CN 201510092808A CN 104722389 A CN104722389 A CN 104722389A
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step
operation
floatation
fine
slurry
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CN 201510092808
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Chinese (zh)
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桂夏辉
曹亦俊
张义
王大鹏
刘炯天
夏灵勇
佟顺增
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中国矿业大学
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION 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
    • B03BSEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B1/00Conditioning for facilitating separation by altering physical properties of the matter to be treated
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION 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
    • B03BSEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B1/00Conditioning for facilitating separation by altering physical properties of the matter to be treated
    • B03B1/04Conditioning for facilitating separation by altering physical properties of the matter to be treated by additives
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION 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
    • B03BSEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B7/00Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage

Abstract

The invention discloses a dissociating, independent slurry mixing and bulk floatation process for fine grain middings and belongs to the technical field of coal slime floatation. The process comprises the first step of slurry mixing operation, the second step of roughing, the third step of dehydration and fine floatation operation, the fourth step of separation and desliming operation, the fifth step of coarse slime separation operation, the sixth step of desliming operation and the seventh step of ore grinding operation. According to the independent slurry mixing bulk floatation process for dissociating the coal from the fine grains, the procedure is simple, investment is small, energy consumption is low, the operation cost is low, the separation efficiency is high, and economical benefits are remarkable.

Description

—种细粒中煤解离-独立调浆-混合浮选工艺 - kind of coal fines dissociation - Independent pulp - flotation process

技术领域 FIELD

[0001] 本发明涉及煤泥浮选技术领域,尤其涉及一种适用于中煤连生体较多的高灰难选煤泥分选工艺。 [0001] The present invention relates to Coal flotation technology, and particularly relates to coal suitable for the living body more refractory high ash Coal Separation Process.

背景技术 Background technique

[0002] 随着机械化采煤程度不断提高而煤炭资源逐渐减少,我国入选煤质不断变差,高灰难选煤泥含量也逐渐增多,给煤炭资源的高效分离与洁净化利用带来了极大地挑战。 [0002] With the mechanization of coal resources and coal continue to improve gradually reduced, our country continues to deteriorate selected coal, refractory high ash content coal slurry is gradually increasing, to the efficient separation of the clean use of coal resources has brought a very earth challenge. 高灰难选煤泥主要表现特征为灰分高、中煤含量大、可浮性差,在分选时面临的突出问题就是精煤灰分超标,而尾煤灰分低。 Refractory high ash coal slurry mainly characterized by high ash content, high coal content, floatability poor, highlighting the problems faced when sorting is excessive coal ash, coal ash and low tail. 一般浮选工艺分选中间连生体多的高灰难选煤泥难以达到理想效果,部分未解离的中灰煤泥若进入精煤,则精煤灰分超标,进入尾煤则尾煤灰分低,不解离分选效果必然受到影响;若对其进行解离,又引发了细泥污染加剧的问题,这主要是中煤解离的同时煤与矸石的粒度相较于磨矿之前都大大减小,高灰细泥含量在经过研磨后也大大增加,这部分煤泥与入浮煤泥一起浮选时由于细泥的竞争吸附使其对精煤的污染变得更为严重,精煤灰分超标,即使解离时分选效果也不够理想。 Sorting flotation process is generally intermediate the living body and more high ash Coal refractory difficult to achieve the desired effect, partially undissociated ash coal slime if entered, the ash content is excessive, the coal enters the tail end of the low ash fraction , puzzled certainly be affected from the separation efficiency; if from its solution, but also led to increased pollution of fine mud, mainly in coal dissociated while coal and waste rock are considerably compared to the size before grinding reduce the high ash content in the fine mud after grinding also increased significantly, when this part of the coal flotation with the floating slime due to the competitive adsorption of fine mud contamination for refined coal so that it becomes more severe, clean coal ash exceeded, even if the solution is not ideal from the division election results.

[0003] 关于高灰难选煤泥细泥污染严重问题一直困扰着业内学者,细泥对药剂的竞争吸附加剧了跑粗,同时容易被夹带污染精煤,跑粗与污染并存的现状一直难以改善。 [0003] on high ash fine mud slime refractory serious pollution problem has plagued the industry academics, fine mud competitive adsorption of the drug exacerbated the run rough, while likely to be contaminated entrained coal, crude runs and the pollution of the status quo has been difficult improve. 许多专家意识到了粗细粒煤泥的不同浮选特性,并通过浮选条件优化来增加粗粒回收率与细粒选择性减少污染,但忽视了浮选作业前的预调浆过程。 Many experts recognize the different thickness of grain flotation characteristics of slime, and to increase the recovery of coarse and fine conditions by optimizing flotation selectivity to reduce pollution, but ignore the pre-mashing process before flotation operation. 如果通过调浆过程强化实现药剂与颗粒选择性吸附对于解决浮选过程中跑粗与细泥污染问题提高分选效率大有裨益。 If the strengthening agent to achieve selective adsorption of the particle solution for the flotation process Coarse and fine soil pollution problems of great benefit to improving the efficiency of separation by the mashing process. 针对高灰难选煤泥中煤连生体含量多致使分选效率差的问题提出一种能够有效解决磨矿后细泥污染与浮选跑粗严重的简单有效分选工艺对于促进煤炭资源清洁化利用意义重大。 Refractory for high ash coal slime in the living body and more content resulting in poor separation efficiency points which can effectively address the issues raised after the grinding and flotation of fine mud contaminated run rough serious separation process is simple and effective for the promotion of clean coal resources the use of great significance.

发明内容 SUMMARY

[0004] 本发明旨在于提供一种可有效可实现中煤连生体较多的高灰难选煤泥的分选工艺,将浮选尾煤粗粒给入粗煤泥系统分选,将中煤产品磨矿解离;同时通过调浆强化解决了常规中煤磨后浮选中细泥污染严重问题,提供了一种低成本、工艺简单、投资少、分选效率高、经济效率显著的分选高灰难选煤泥工艺方法。 [0004] The present invention is intended to provide a more efficient can be achieved with the living body in high-ash coal refractory slime sorting process, the coarse coal flotation tailings to the coarse slime sorting system, in the coal grinding dissociation; while strengthening solve the serious problem of pollution fine mud after conventional coal flotation mill by mixing, to provide a low-cost, simple process, low investment, high separation efficiency, economic efficiency significantly Slurry process for separation of high ash refractory.

[0005] 本发明采用如下技术方案: [0005] The present invention adopts the following technical solution:

[0006] 本发明的细粒中煤解离-独立调浆-混合浮选工艺如下: [0006] The present invention fine coal dissociation - Independent pulp - flotation process is as follows:

[0007] A、粗煤泥分选作业:将浮选尾煤粗粒与粗煤泥,粒度2-0.25mm,一并给入螺旋分选机进行以排出高灰粗粒矸石,轻产物给入TBS分选机得到粗精煤泥、粗中煤泥,将浮选尾煤粗粒给入粗煤泥分选系统以回收浮选不能回收的低灰粗粒,同时排出粗粒高灰矸石,将抛尾和拔头后的粗中煤泥在脱水后磨矿解离,避免了对低灰和高灰粗粒磨矿带来的能量耗费以及对浮选的不利影响,减小了磨煤产生的高灰细泥量; [0007] A, coarse slime sorting operation: the coarse coal flotation tailings and coarse coal slurry, particle size 2-0.25mm, together with the spiral separator to be discharged at high ash coarse gangue, to light products to give the crude TBS sorter slime, crude and coal, coarse coal to the flotation tailings into coarse slime flotation separation system can not be recycled to recover the coarse low ash, high ash while discharging coarse gangue , tailing and the post mill slime topped crude and dissociated ore after the dehydration, avoiding the high ash and coarse low ash grinding bring adverse effects on the energy consumption and the flotation, reducing wear the amount of high ash coal fine mud produced;

[0008] B、调浆浮选作业:根据入浮煤泥矿浆和中煤解离矿浆的粒度不同对调浆能量输入的不同要求,将入浮煤泥通过充分保证调浆时间-调浆时间不小于4min,以确保浮选捕收剂在煤粒表面的充分吸附;中煤矿浆给入多段强制搅拌调浆设备内,搅拌叶轮线速度不小于6m/s,使解离细粒和浮选捕收剂在调浆设备内充分分散,实现细粒中煤与捕收剂的有效吸附,预调浆后的入浮煤泥与解离中煤一并给入浮选机进行分选以简化浮选流程。 [0008] B, flotation pulp: The pulp and the floating coal slime solutions different from the size of the pulp slurry different requirements reversed energy input, will float into the slime pulp by sufficiently guaranteed time - mashing time is not less than 4min, to ensure adequate flotation collector adsorption on coal surface; coal slurry in a multistage forced into the pulp within the agitation apparatus, the linear velocity of the stirring impeller is not less than 6m / s, dissociating fines and flotation collector well dispersed in the pulp apparatus, the effective adsorption of fine coal and the collector, and slime floating into the solution from the pre-slurried coal flotation machine together with the infeed to simplify sorting floating the election process.

[0009] 本发明的细粒中煤解离-独立调浆-混合浮选工艺的具体方法如下: [0009] The present invention fine coal dissociation - Independent pulp - flotation process is specifically as follows:

[0010] (I)调浆作业: [0010] (I) slurried operations:

[0011] 将入浮煤泥加入到单段叶轮调浆搅拌桶,调浆时间不小于4min,以确保浮选捕收剂在煤粒表面的充分吸附;中煤矿浆加入多段强制搅拌调浆设备内,在高强度调浆条件下,搅拌叶轮线速度不小于6m/s ; [0011] Coal was added to the float into a single stage mixing bucket wheel pulp, mashing time is not less than 4min, to ensure adequate flotation collector adsorption on coal surface; coal slurry was added in a multistage forced stirring equipment pulp inside, at a high pulp strength conditions, the linear velocity of the stirring impeller is not less than 6m / s;

[0012] (2)粗选作业: [0012] (2) roughing operations:

[0013] 将经过预调浆后的入浮煤泥与中煤解离细粒矿浆通过管道混合后给到浮选机中,经过浮选机分选后得到浮选精煤与浮选尾煤; [0013] After the coal into the solution and slime floating after pre fines from pulp by mashing the mixing conduit to the flotation machine, flotation machine after sorting to obtain coal flotation concentrate and flotation tailings ;

[0014] (3)脱水及精选作业: [0014] (3) dehydration and selection operations:

[0015] 浮选机浮选精煤自流进入沉降过滤式离心机进行脱水,回收其中低灰粗粒精煤,离心机滤液进入精选浮选设备-浮选柱中分选得到精煤与尾煤,通过精选减少细泥对精煤的污染,精选后的精煤矿浆与尾煤均进入后续脱水处理,得到尾煤泥; [0015] Flotation machine flotation concentrate into the bowl centrifuge gravity dehydration, coarse low ash coal recovered wherein the centrifuge filtrate into the flotation equipment selection - Column Flotation Tail for sorting to obtain refined coal and coal, through the selection of the coal to reduce the contamination of fine clay, coal slurry after choice and enter the subsequent dewatering coal tailings are treated to give slime;

[0016] (4)分选及脱泥作业: [0016] (4) off the mud and sorting operations:

[0017] 粗选尾煤分别经过分级旋流器与脱泥筛进行浓缩脱水,分级旋流器溢流与脱泥筛筛下水与精选尾煤一起进入后续脱水处理,得到尾煤泥,尾煤粗粒给入TBS分选; [0017] respectively, after roughing Tailings classifier with cyclone Desliming dewatering sieve, cyclone overflow into the classification together with water and desliming sieve Discover subsequent dewatering coal tailings, to give Slime, tail TBS coarse coal infeed sorting;

[0018] (5)粗煤泥分选作业: [0018] (5) The crude slime sorting operation:

[0019] 经过脱泥筛脱泥脱水后的尾煤粗粒与重选粗煤泥,重选粗煤泥粒度2-0.25mm, 一并给入螺旋分选机分选,螺旋轻产物给入TBS分选机,得到矸石、粗中煤泥及粗精煤泥;粗精煤泥及矸石进一步脱水处理后作为产品,粗中煤泥进入脱泥作业后磨矿解离; [0019] After coarse coal tailings after desliming and dewatering screen Desliming reselection crude slime, slime reselection coarse granularity 2-0.25mm, together with the infeed spiral separator sorting, light product to the helix TBS sorter give gangue, crude and crude slime in slime; the coarse coal slime and gangue was further dehydrated as a product, the crude slime into the grinding job desliming dissociation;

[0020] (6)脱泥作业: [0020] (6) desliming operations:

[0021] TBS分选出的粗中煤泥进入弧形筛进行脱泥脱水,筛上物进入磨机进行解离,筛下水与磨后细粒合并一起返回调浆浮选作业; [0021] TBS Slime sorted into the arcuate coarse sieve desliming dehydrated sieve was dissociated into the mill, a sieve and grinding the combined water return fines slurried with flotation;

[0022] (7)磨矿作业: [0022] (7) grinding operations:

[0023] 经过脱水脱泥后的粗中煤泥进入磨煤机中研磨解离,磨机可根据入料性质与解离粒度要求调整转速(工作转速为临界转速的65% -85% ),磨后产品中-0.074mm部分占40-50%,解离后的中煤泵送返回至中煤调浆设备调浆。 [0023] Coarse Slime dehydrated after desliming dissociated into the grinding mill, the mill may be required to adjust the size dissociation speed (operating speed of 65 to 85% of critical speed) according to the nature of the feed, after grinding products -0.074mm part accounts for 40-50%, after dissociation coal pumped back to the coal mashing device pulp.

[0024] 步骤(I)中,入浮煤泥与中煤磨矿煤泥进行调浆作业时,加入柴油或煤油作为浮选捕收剂,用量为100-300g/t。 [0024] Step (I), when the float coal slime and slurried for Slurry grinding operation, diesel or kerosene was added as flotation collectors, in an amount of 100-300g / t. 通过添加水量保证入浮矿浆浓度为60-80g/L。 By adding water to ensure that the floating pulp density 60-80g / L.

[0025] 步骤(3)中,脱水及精选作业根据精煤灰分做出调整,在浮选机浮选精煤合格时则不需脱水精选环节。 [0025] Step (3), the dehydration and selection operations to make adjustments according to the ash content in coal flotation during flotation without dehydrating the selection of qualified links.

[0026] 本发明的积极效果如下: [0026] The positive effect of the present invention are as follows:

[0027] 本发明是基于中煤磨矿解离的煤泥浮选工艺。 [0027] The present invention is based on the slime flotation process dissociated coal grinding. 对粗选浮精进行粗粒回收、细粒精选以减少细泥污染;粗选尾煤在浓缩分级后粗粒与粗煤泥一起重选实现“拔头”与“抛尾”,粗选尾煤高灰细粒直接作为尾煤。 Flotation of roughing coarsely recovery, to reduce the fine selection of fine mud contamination; rougher Tailings After concentration the crude slime together with the coarse graded reselection achieve "topped" and "tailing" roughing Tailing ash fines directly as coal tailings. 将重选中煤泥解离磨矿,避免了浮选尾煤中的粗粒矸石与低灰粗粒的粉碎对浮选造成不利影响。 The reselection slime dissociation grinding, to avoid the coal floatation of coarse waste rock and low ash coarse crushing adversely affect the flotation. 同时将粒度较细的中煤解离煤泥单独调浆,匹配以高能量输入强化调浆转速效应,达到脱附概率与碰撞概率的平衡以加强细粒与药剂吸附的选择性;粗粒的浮选入料在一定的调浆转速条件下充分保证调浆时间来强化其对药剂吸附作用以提高粗粒的回收率,首次应用中煤磨矿解离单独调浆-混合浮选工艺实现对中煤连生体含量较多的高灰难选煤泥的高效分选。 While the fine-grained coal slurry dissociation slime tone alone, high energy input matches slurried speed strengthening effect, desorption equilibrium probability of collision probability to enhance the selective adsorption of an agent and fines; grit flotation feed pulp at a certain speed condition to ensure sufficient time to strengthen its pulp adsorption of the agent to improve the recovery of coarse particles, the first application in the coal grinding dissociation alone pulp - flotation process to achieve even more the content of raw coal ash refractory high efficient separation of slime.

[0028] 主要优点有: [0028] The main advantages are:

[0029] A、将粗选尾煤粗粒与粗煤泥一起分选,重选中煤研磨解离,可以通过重选回收浮选不能回收的粗粒,排出粗粒高灰矸石,在解决跑粗问题的同时还避免了对低灰和高灰粗粒磨矿带来的能量耗费及对浮选的不利影响,减小了无选择磨矿产生的高灰细泥量。 [0029] A, selected from crude coal tailings and coarse Slime Separation together, grinding coal reselection from solution, can be recovered by flotation reselection can not be recycled coarse, high ash discharging coarse gangue, the solution ran while crude also avoids the problem of low ash high ash and coarse grinding energy consumption and bring negative impact on the flotation, reducing the non-selection of fine grinding of mineral raw ash high clay content.

[0030] B、根据精煤灰分要求设有精煤再选环节,将粗选精煤用沉降过滤式离心机的脱水后回收低灰粗粒,滤液浮选柱精选以减少细泥对精煤的污染。 [0030] B, with coal and then selected according to the ash content segment request coarse low ash recovered, filtered and the filtrate flotation column selection centrifuge coal rougher by sedimentation of the fine mud dehydrated to reduce fine pollution of coal.

[0031] C、针对入浮煤泥与中煤磨矿后的煤泥粒度的不同而对调浆能量输入的不同要求,匹配以不同的搅拌调浆设备。 [0031] C, for different particle sizes of slime into the grinding and slime floating coal slurry and energy input requirements of the different swap, the matching of different stirring devices pulp. 粗粒矿浆给入单段叶轮调浆搅拌桶,充分保证调浆时间以确保浮选捕收剂在颗粒表面的充分吸附;细粒矿浆给入多段强制搅拌调浆设备内,该设备设有三层搅拌叶轮且搅拌转速高,使细粒矿浆和浮选捕收剂在调浆设备内充分分散,实现细粒煤泥与捕收剂的有效吸附。 Coarse pulp to pulp into a single stage impeller mixing bucket, to ensure sufficient time to ensure adequate mashing flotation collector adsorption on the particle surface; fines pulp to the multi-modulation forced stirring in the pulp, the apparatus is provided with three high speed agitation stirring impeller and the pulp and fine flotation collector well dispersed in the pulp apparatus, the fine coal and the effective adsorption of the collector. 通过调浆过程的强化提高药剂吸附质量,增加粗粒的回收率与细粒的选择性。 Improve the adsorption agent by enhancing the quality of the mashing process, increase the selectivity and recovery of coarse particles fine particles.

[0032] D、该工艺流程简单、投资少,耗电量小,运行费用低,同传统浮选工艺相比,分选效率高,经济效益显著。 [0032] D, the process is simple, low investment, low power consumption, low operating cost, compared to conventional flotation process, high separation efficiency, significant economic benefits.

附图说明 BRIEF DESCRIPTION

[0033] 图1是本发明的分选工艺流程框图。 [0033] FIG. 1 is a block diagram illustrating the sorting process of the present invention.

[0034] 图2是本发明的细粒中煤解离-独立调浆-混合浮选工艺的装置图。 [0034] FIG. 2 is a coal fines according to the present invention, dissociation - Independent pulp - flotation process apparatus of FIG.

[0035] 图中:A入料调浆搅拌桶、B中煤调浆搅拌桶、C浮选机、D尾煤缓冲池、E精矿缓冲箱、F分级入料泵、G沉降过滤式离心脱水机、H浮选柱、I气泡发生器、J循环泵、K分级旋流器、L高频筛、M螺旋分选机、NTBS分选机、O弧形筛、P球磨机、Q中煤缓冲池、R中煤入料泵、I粒度较粗的浮选入料矿浆、2循环水、3药剂、4调浆后的粗细粒矿浆混合物、5浮选精煤、6浮选尾煤、7旋流器溢流、8旋流器底流、9高频筛筛上物、10高频筛筛下水、11粗煤泥、12轻产物、13粗粒矸石、14粗精煤泥、15粗中煤泥、16弧形筛筛下物、17弧形筛筛上物、18滤液、19低灰粗粒精煤、20精选精煤矿浆、21精选尾煤、22最终精煤产品、23最终的尾煤。 [0035] FIG. Where: A pulp feed mixing bucket, B slurried coal mixing bucket, C flotation machine, D pool coal tailings, E concentrate buffer tank, F grade feed pump, G Centrifuge in dehydrator, H flotation column, I bubble generator, J circulation pump, K cyclone classifier, L high-frequency screen, M spiral separator, NTBS sorter, O sieve bend, P mill, Q coal pool, R coal feed pump, the I coarser flotation feed pulp, recycled water 2, 3 agent, the thickness of the slurry mixture is granulated after mashing 4, 5 flotation concentrate, 6 flotation tailing, 7 cyclone overflow, underflow hydrocyclone 8, 9 on the sieve was high frequency, high frequency 10 sieve into the water, the crude slime 11, 12 light products, coarse gangue 13, 14 coarse and fine coal, crude 15 slime, 16 under the arcuate sieve was 17 on arcuate sieve was 18 filtrate 19 coarse low ash coal, coal slurry 20 selection, selection of the end 21 of coal, coal final product 22, 23 final of coal tailings.

具体实施方式 detailed description

[0036] 下面结合附图对本发明的实施例作进一步的描述: [0036] The following embodiments in conjunction with the accompanying drawings of embodiments of the present invention are further described:

[0037] 实例:如图1所示,本发明的细粒中煤解离-独立调浆-混合浮选工艺,根据入浮煤泥矿浆和中煤解离矿浆粒度不同对调浆能量输入的不同要求,将入浮煤泥给入单段叶轮调浆搅拌桶,充分保证调浆时间(调浆时间不小于4min)以确保浮选捕收剂在煤粒表面的充分吸附;中煤矿浆给入多段强制搅拌调浆设备内,该设备设有三层搅拌叶轮且搅拌转速高(搅拌叶轮线速度不小于6m/s),使解离细粒和浮选捕收剂在调浆设备内充分分散,实现细粒煤泥与捕收剂的有效吸附,调浆时应根据浓度要求添加适当循环水。 [0037] Example: As illustrated, the fine particles of the present invention, dissociation of coal 1 - Independent pulp - flotation process, different from the swap different pulp slurry particle size according to the energy input into the slurry and floating coal slime Solutions requirements, the single segments infeed slime floating pulp impeller mixing bucket, to ensure sufficient time mashing (mashing time is not less than 4min) to ensure adequate flotation collector adsorption on coal surface; coal slurry in the infeed multi-tone forced stirring in the pulp, the apparatus is provided with an agitation impeller and three high speed stirring (stirring impeller is not less than the linear velocity of 6m / s), fines and dissociating flotation collector well dispersed within the pulp equipment, effective adsorption fine coal with the collector, the slurry should be adjusted depending on the concentration of circulating water was added the appropriate requirements. 将经过预调浆后的入浮煤泥与中煤解离细粒通过管道混合后给到浮选机中,经过浮选机分选后得到浮选精煤与浮选尾煤。 After the pre-slurried with slime into the floating coal fines by dissociation to the mixing pipe into the flotation machine, obtained through flotation of coal flotation concentrate and flotation tailings after sorting. 在精煤灰分超标时,将浮选机浮选精矿给入沉降过滤式离心机进行脱水,回收其中的低灰粗粒精煤;离心机滤液则给入精选浮选设备(浮选柱)中分选得到精煤与尾煤,精选后的精煤矿浆与尾煤均进入后续脱水处理,此作业可根据精煤灰分做出调整,在浮选机浮选精煤合格时则可不需脱水精选环节。 When the ash content exceeded, the flotation concentrate to a flotation machine into the dehydrated bowl centrifuge, recovering the coarse low ash coal therein; Featured into the centrifuge filtrate to the flotation apparatus (Column Flotation ) for sorting to obtain refined coal and coal tailings, coal slurry after choice and coal tailings are dewatered into the subsequent process, this job can be adjusted according to the ash content, can not at the time of passing the flotation machine flotation concentrate Featured links need dehydration. 粗选尾煤经过分级旋流器与脱泥筛进行浓缩脱水,分级旋流器溢流与脱泥筛筛下水与精选尾煤一起进入后续脱水处理,脱泥筛脱泥脱水后的尾煤粗粒与重选粗煤泥(粒度2-0.25mm) 一并给入螺旋分选机分选,螺旋轻产物给入TBS分选机,得到矸石、粗中煤泥及粗精煤泥。 After rougher grade flow through the coal tailings with a sieve desliming dewatering, grading and desliming cyclone overflow sieve with water into the selection of subsequent dewatering coal tailings with, desliming screen Desliming dehydration Tailings coarse and coarse slime reselection (particle size 2-0.25mm) together into a spiral separator for sorting, light products helical infeed TBS sorter, gangue to give the crude slime in slime and coarse. 粗精煤泥及矸石进入进一步脱水处理作为产品,TBS分选出的粗中煤泥进入弧形筛进行脱泥脱水,弧形筛上物进入磨煤机中研磨解离,筛下水与解离后的中煤返回泵送至细粒调浆设备调浆。 Slime and coarse gangue further into the product as dehydrated, TBS Slime sorted into the arcuate coarse sieve desliming dehydration, the sieve bend was triturated dissociated into the mill, the sieve with water dissociation after the coal fines pumped to return the device slurried pulp. 细粒中煤独立调浆-混合浮选工艺相较于常规的混合浮选,在相同药耗条件下,可提高精煤产率0.5%,降低精煤灰分 Fine coal slurried independently - flotation process as compared to a conventional flotation, drug consumption under the same conditions, can increase the yield of clean coal of 0.5%, reducing the ash content

1. 1.

[0038] 如图2所示,本发明的独立调浆-混合浮选工艺主要设备包括入料调浆搅拌桶A、中煤调浆搅拌桶B、浮选机C、尾煤缓冲池D、精矿缓冲箱E、分级入料泵F、沉降过滤式离心脱水机G、浮选柱H、气泡发生器1、循环泵J、分级旋流器K、高频筛L、螺旋分选机M、TBS分选机N、弧形筛0、球磨机P、中煤缓冲池Q、中煤入料泵R。 [0038] As shown in FIG 2, the present invention is independent mashing - flotation process mainly pulp feeding device comprises mixing bucket A, slurried coal mixing vessel B, the flotation units C, D coal tailings buffer pool, concentrate the buffer tank E, F. graded feed pump, centrifugal settling filter dehydrator G, flotation column H, bubble generator 1, circulating pump J, cyclone classifier K, high-frequency screen L, M spiral separator , TBS sorter N, 0 curved screen, a ball mill P, coal buffer pool Q, R. coal feed pump 粒度较粗的浮选入料矿浆I在粗粒单层叶轮调浆搅拌桶A内,添加一定量药剂3在一定搅拌转速下充分保证调浆时间下进行调浆;中矿解离后的细粒矿浆17泵送至多段强制搅拌调浆设备B内,并添加一定量的药剂3在一定调浆时间下保证高调浆转速输入下使细粒矿浆与药剂充分分散调浆,调浆过程可添加循环水2以满足调浆及浮选过程的浓度要求。 Coarser flotation feed into coarse pulp I stirred slurried inner tub single impeller A, a certain amount of agent added to a certain stirring speed 3 to ensure sufficient time for the slurried pulp; after dissociation of fine middlings pumping slurry particles up to 17 segments in the pulp modulation forced stirring device B, and a certain amount of agent to ensure a certain slurried 3 times so that the fine pulp and the high-profile agent well dispersed slurry mashing speed of the input, the mashing process may be added 2 to meet the concentration of circulating water, and mashing the flotation process requirements. 调浆后的粗细粒矿浆1、17通过管道混合均匀后给入浮选机C中进行分选,得到浮选精煤5与浮选尾煤6,分别自流至精矿缓冲箱E与尾煤缓冲池D。 Grain thickness 1,17 mashing the slurry after sorting by the mixing pipe into the flotation machine C to uniformity to obtain flotation concentrate and flotation tailing 5 6, respectively, to the gravity and concentrate buffer tank E Tailings buffer pool D. 浮选精煤5给入到沉降过滤式离心脱水机G中回收低灰粗粒精煤19,滤液18给入到浮选柱H中精选得到精选精煤矿浆20与精选尾煤21进入后续脱水处理;在浮选机C精煤灰分达标时则无需对精煤进行脱水、精选作业,此时精矿5直接作为最终浮选精煤至后序处理。 5 into the flotation concentrate to centrifugal settling filter dehydrator G coarse low ash coal recovered 19, 18 to the filtrate into the flotation column H in the selection of coal slurry obtained Picks Picks 20 and 21 Tailings entering the subsequent dehydration treatment; you do not need to be dehydrated at coal flotation coal ash C standard, job selection, then concentrate to a treatment sequence 5 directly as the final flotation concentrate. 尾煤矿浆6在缓冲后泵送至分级旋流器K中进行分级,底流8进入高频筛L进行脱泥脱水,旋流器溢流7与筛下水10作为尾煤进入后续作业。 Tail 6 coal slurry is pumped to the buffer after the cyclone classifier classifying K in the bottom stream 8 enters a high-frequency L is desliming screen dehydration cyclone overflow water 10 and screen 7 as coal tailings into the subsequent job. 高频筛筛上物9与粗煤泥11进入螺旋分选机M进行分选,得到轻产物12与粗粒矸石13,轻产物进一步给入TBS分选机N分选得到粗精煤泥14与粗中煤泥15。 9 was high-frequency coarse sieve 11 into the slime spiral separator sorting machine M, to give the product 12 and coarse gangue light 13, the light product is further infeed TBS sorter sorting give crude N Slime 14 slime crude 15. 粗中煤泥15进入弧形筛O脱水后的筛上物17给入磨煤机O进行研磨解离,筛下物16和解离后细粒中煤混合矿浆18经过缓冲池P缓冲后泵送至多段强制搅拌调浆设备B调浆。 The oversize after rough Slime curved screen 15 into the dewatering O 17 O infeed grinding mill dissociate under the sieve 16 after the dissociation mixing fine coal slurry 18 after pumping the buffer pool P up segment B forced stirring apparatus slurried pulp.

[0039] 尽管已经示出和描述了本发明的实施例,对于本领域的普通技术人员而言,可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型,本发明的范围由所附权利要求及其等同物限定。 [0039] While there has been illustrated and described embodiments of the present invention, those of ordinary skill in the art, to be understood that various changes may be made to these embodiments without departing from the principles and spirit of the present invention, modifications, substitutions and modifications, the scope of the invention being indicated by the appended claims and their equivalents.

Claims (4)

1.一种细粒中煤解离-独立调浆-混合浮选工艺,其特征在于: A、粗煤泥分选作业:将浮选尾煤粗粒与粗煤泥,粒度2-0.25mm,一并给入螺旋分选机进行以排出高灰粗粒矸石,轻产物给入TBS分选机得到粗精煤泥、粗中煤泥,将浮选尾煤粗粒给入粗煤泥分选系统以回收浮选不能回收的低灰粗粒,同时排出粗粒高灰矸石,将抛尾和拔头后的粗中煤泥在脱水后磨矿解离,避免了对低灰和高灰粗粒磨矿带来的能量耗费以及对浮选的不利影响,减小了磨煤产生的高灰细泥量; B、调浆浮选作业:根据入浮煤泥矿浆和中煤解离矿浆的粒度不同对调浆能量输入的不同要求,将入浮煤泥通过充分保证调浆时间-调浆时间不小于4min,以确保浮选捕收剂在煤粒表面的充分吸附;中煤矿浆给入多段强制搅拌调浆设备内,搅拌叶轮线速度不小于6m/s,使解离细粒和浮选捕收剂在调浆设备 1. A particulate coal dissociation - Independent pulp - flotation process, wherein: A, coarse slime sorting operation: the coarse coal flotation tailings and coarse coal slurry, particle size 2-0.25mm , together with the spiral separator to be discharged at a high gangue coarse ash, into light products to give the crude TBS sorter slime, crude and slime, the coarse particles flotation tailing infeed coarse slime flotation sorting system can not be recycled to recover the coarse low ash, high ash while discharging coarse waste rock, tailing and the post-topped crude and slime dehydrating grinding after dissociation, avoiding the low ash and high ash coarse grinding bring adverse effects on energy expenditure and the flotation, reducing the amount of fine mud generated by high ash coal mill; B, slurried flotation operation: the pulp from the pulp and slime floating coal Solutions the particle size of the different requirements of different pulp reversed energy input, will be fully guaranteed by the floating slime pulp time - mashing time is not less than 4min, flotation collectors to ensure that sufficient adsorbed on the surface of coal particles; coal slurry in the infeed multistage forced stirring device adjusted in the pulp, the linear velocity of the stirring impeller is not less than 6m / s, and dissociating fines in flotation collectors mashing apparatus 内充分分散,实现细粒中煤与捕收剂的有效吸附,预调浆后的入浮煤泥与解离中煤一并给入浮选机进行分选以简化浮选流程。 The fully dispersed, to achieve effective absorption of fine particles of coal and the collector, and slime floating into the solution from the pre-slurried coal flotation machine together with the infeed to simplify sorting flotation process.
2.如权利要求1所述的细粒中煤解离-独立调浆-混合浮选工艺,其特征在于:所述工艺的具体方法如下: (1)调浆作业: 将入浮煤泥加入到单段叶轮调浆搅拌桶,调浆时间不小于4min,以确保浮选捕收剂在煤粒表面的充分吸附;中煤矿浆加入多段强制搅拌调浆设备内,在高强度调浆条件下,搅拌叶轮线速度不小于6m/s ; (2)粗选作业: 将经过预调浆后的入浮煤泥与中煤解离细粒矿浆通过管道混合后给到浮选机中,经过浮选机分选后得到浮选精煤与浮选尾煤; (3)脱水及精选作业: 浮选机浮选精煤自流进入沉降过滤式离心机进行脱水,回收其中低灰粗粒精煤,离心机滤液进入精选浮选设备-浮选柱中分选得到精煤与尾煤,通过精选减少细泥对精煤的污染,精选后的精煤矿浆与尾煤均进入后续脱水处理,得到尾煤泥; (4)分选及脱泥作业: 粗选尾煤分别经过分级旋流器 2. The fine coal according to claim 1 dissociates - Independent pulp - flotation process, characterized in that: the specific method of the process as follows: (1) Job slurried: the slime was added into the float to single-stage impeller pulp mixing bucket, mashing time is not less than 4min, to ensure that the flotation collector sufficiently adsorbed in the coal surface; the coal slurry was added multistage forced stirring the pulp equipment, high intensity slurried condition , the linear velocity of the stirring impeller is not less than 6m / s; (2) roughing operation: after the pre-slurried with slime into the floating coal fines from the pulp through the solution mixed into the conduit to the flotation machine after the floating sorter sorting the resulting coal flotation concentrate and flotation tailings; (3) dehydration and selected operations: enter flotation machine flotation concentrate gravity bowl centrifuge dewatered coarse low ash coal recovered wherein centrifuge filtrate into the flotation equipment selection - flotation column for sorting to obtain refined coal and coal tailings, fine mud by reducing pollution of the selection of the coal, the coal slurry with the choice goes to a subsequent dewatering coal tailings are to give slime; (4) off the mud and sorting operations: Tailings respectively, after roughing cyclone classifier 脱泥筛进行浓缩脱水,分级旋流器溢流与脱泥筛筛下水与精选尾煤一起进入后续脱水处理,得到尾煤泥,尾煤粗粒给入TBS分选; (5)粗煤泥分选作业: 经过脱泥筛脱泥脱水后的尾煤粗粒与重选粗煤泥,重选粗煤泥粒度2-0.25mm, 一并给入螺旋分选机分选,螺旋轻产物给入TBS分选机,得到矸石、粗中煤泥及粗精煤泥;粗精煤泥及矸石进一步脱水处理后作为产品,粗中煤泥进入脱泥作业后磨矿解离; (6)脱泥作业: TBS分选出的粗中煤泥进入弧形筛进行脱泥脱水,筛上物进入磨机进行解离,筛下水与磨后细粒合并一起返回调浆浮选作业; (7)磨矿作业: 经过脱水脱泥后的粗中煤泥进入磨煤机中研磨解离,工作转速为临界转速的65 % -85 %,磨后产品中-0.074mm部分占40-50 %,解离后的中煤泵送返回至中煤调浆设备调浆。 Desliming dewatering sieve, cyclone overflow into the classification together with water and desliming sieve Discover subsequent dewatering coal tailings, to give Slime, coarse coal infeed end of the sorting TBS; (5) coarse coal mud sorting operation: after the end of the coarse coal desliming and dewatering screen Desliming reselection crude slime, slime reselection coarse granularity 2-0.25mm, together with the infeed spiral separator sorting spiral light products TBS sorter infeed, to give gangue, coarse and coarse coal slime in slime; coarse coal slime and gangue was further dehydrated as a product, the crude slime into the grinding job after desliming dissociation; (6) desliming job: TBS slime sorted into the arcuate coarse sieve desliming dehydration, the sieve was dissociated into the mill, pulp returns the sieve with water flotation combined with the fine grinding; (7 ) grinding operations: coarse slime dehydrated after desliming dissociated into the grinding mill, the operating speed of 65 to 85% of the critical speed, the mill product -0.074mm portion comprises 40-50%, after dissociation coal pumped back to the coal slurrying mashing device.
3.如权利要求2所述的细粒中煤解离-独立调浆-混合浮选工艺,其特征在于:步骤(I)中,入浮煤泥与中煤磨矿煤泥进行调浆作业时,加入柴油或煤油作为浮选捕收剂,用量为100_300g/t,通过添加水量保证入浮矿浆浓度为60-80g/L。 3. A fine coal according to claim 2 dissociation - Independent pulp - flotation process, characterized in that: step (I), the slime into the floating coal grinding and slurrying operations performed Slurry when added as kerosene or diesel flotation collector, an amount of 100_300g / t, the addition of water to ensure that the floating pulp density 60-80g / L.
4.如权利要求2所述的细粒中煤解离-独立调浆-混合浮选工艺,其特征在于:步骤(3)中,脱水及精选作业根据精煤灰分做出调整,在浮选机浮选精煤合格时则不需脱水精选环节。 4. The coal fines according to claim 2 dissociation - Independent pulp - flotation process wherein: in step (3), the dehydration and selection operations to make adjustments according to the ash content in the floating when the sorter flotation concentrate dewatering you do not need a qualified selection of links.
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