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Publication numberCN104722389 A
Publication typeApplication
Application numberCN 201510092808
Publication date24 Jun 2015
Filing date2 Mar 2015
Priority date2 Mar 2015
Publication number201510092808.1, CN 104722389 A, CN 104722389A, CN 201510092808, CN-A-104722389, CN104722389 A, CN104722389A, CN201510092808, CN201510092808.1
Inventors桂夏辉, 曹亦俊, 张义, 王大鹏, 刘炯天, 夏灵勇, 佟顺增
Applicant中国矿业大学
Export CitationBiBTeX, EndNote, RefMan
External Links: SIPO, Espacenet
Dissociating, independent slurry mixing and bulk floatation process for fine grain middings
CN 104722389 A
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.
Claims(4)  translated from Chinese
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。 A fine coal dissociation - Independent mashing - mixing flotation process, wherein: A, coarse slime sorting operation: The coarse-grained and coarse flotation tailings slime, size 2-0.25mm , be fed into the spiral separator machine to discharge high-ash coarse waste rock, light products to get into the TBS sorter coarse coal slime, crude slime, the flotation tailings to the rough coarse Slime sorting system to recover the flotation can not be recycled coarse low ash, high ash while discharging coarse waste rock, tailing and pull the head after crude slime dehydration after grinding dissociation, avoiding the low ash and high ash coarse grinding energy consumption and bring adverse effects on flotation, reducing the amount of high ash coal grinding fine mud produced; B, mashing flotation operation: from the pulp into pulp and coal slime floating solution based on Swap the different requirements of different particle size slurry energy input into the floating slime will fully guarantee the pulp through time - mashing time is not less than 4min, in order to ensure full flotation of coal particles adsorbed on the surface; in the coal mine slurry infeed multistage forced stirring tune pulp equipment, stirring wheel line speed is not less than 6m / s, so that dissociation fines and flotation in the pulp equipment sufficiently dispersed to achieve effective absorption of fine particles of coal and collector, the floating slime and solution after the pre-mashing together from coal to the flotation machine sorting to simplify the 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; (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。 2. The coal fines according to claim dissociation - Independent mashing - mixing flotation process, characterized by: a specific method of the process is as follows: (1) the mashing jobs: the floating slime added to single-stage impeller mixing bucket mashing, mashing time is not less than 4min, in order to ensure full flotation of coal particles adsorbed on the surface; in the coal mine multistage forced stirring slurry was added within pulp equipment, under conditions of high intensity mashing , stirring impeller linear velocity of not less than 6m / s; (2) roughing jobs: After the pre-mashing into floating slime and coal fines from the slurry through a pipeline solution mixed to the flotation machine, after float After sorting machine sorting of flotation concentrate obtained and flotation tailings; (3) dehydration and selection operations: flotation machine Flotation Concentrate gravity into the bowl centrifuge dehydration, recover coarse low ash coal centrifuge filtrate into the selection of flotation devices - Separated get coal flotation column and tail coal, by selection of fine mud reducing pollution of coal and coal slurry selection and after the end of coal were involved in the subsequent dehydration to give Slime; (4) sorting and off the mud job: roughing, respectively, after the end of coal classification cyclone and Desliming sieve dewatering, classifying cyclone overflow sieve with water and mud off Featured Tailings went into subsequent dehydration to give Slime, tail coarse coal fed into TBS sorting; (5) coarse slime sorting operation: Tailings coarse sieve through the mud off off the mud after dewatering and re-election of crude slime, slime coarse granularity reselection 2-0.25mm, be fed into the spiral sorting machine sorting, spiral light products to the TBS sorting machines to obtain waste rock, rough and coarse coal slime in slime; Coarse As a product, after crude slime into the mud off the job after grinding slime and gangue mineral dissociation further dehydration treatment; (6) off the mud job: Coarse Slime TBS sorted into the curved sieve dehydration off the mud, oversize material into the mill dissociation, after grinding fine sieve into the water and the combined return mashing together flotation operation; (7) grinding job: dehydrated crude slime off the mud into the mill after grinding solution from working speed of the critical speed for 65% -85%, after the mill products accounted for 40-50% -0.074mm part, dissociated after the coal is pumped back to the coal mashing 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. 2, wherein the fine particles of coal to claim dissociation - Independent mashing - mixing flotation process, wherein: step (I), and the floating slime and coal grinding slime were mashing operation When added to diesel or kerosene as a flotation, the amount of 100_300g / t, by adding water to ensure that the floating pulp density of 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. 2, wherein the fine particles of coal to claim dissociation - Independent mashing - mixing flotation process, wherein: step (3), dehydration and selection of jobs to make adjustments based on coal ash, floating When the sorter is not required for flotation concentrate dewatering qualified selection of links.
Description  translated from Chinese
—种细粒中煤解离-独立调浆-混合浮选工艺 - Kind of fine particles of coal dissociation - Independent mashing - mixing flotation process

技术领域 TECHNICAL 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 the field of slime flotation technology, particularly to a coal suitable for the living body more high ash refractory Slime 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 increasing the degree of mechanization of coal mining and coal resources gradually reduced, coal quality continues to deteriorate our selected, high ash content of refractory slime gradually increased, to the efficient separation and clean utilization of coal resources has brought extremely 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 slime mainly characterized by high ash content, the coal content of large, buoyant poor, prominent problem faced when sorting coal ash is excessive, while the low end of coal ash. 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。 Usually flotation process sorting the middle with the living body and more difficult to choose high ash coal slurry is difficult to achieve the desired effect, the gray slime undissociated part if entering coal, coal ash is exceeded, then enter the tail end of the coal ash points lower , understand from separation efficiency will inevitably be affected; if from its solution, but also led to increased fine mud pollution problem, which is mainly the same time in the dissociation of coal and coal gangue granularity compared to before grinding greatly reduced high ash content in the fine mud after grinding also increased significantly, when this part of the slime of the slime flotation float together due to the fine mud make it competitive adsorption becomes more serious pollution coal, coal ash exceeded, even if the election division dissociation effect is not ideal.

[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。 Situation [0003] Refractory slime on high ash fine mud pollution problem has plagued the industry academics, fine mud competition intensified adsorption agents run rough, while likely to be entrained coal pollution, run rough and pollution has been difficult coexistence 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 recognized the different thickness of grain slime flotation characteristics, and by optimizing the flotation conditions to increase the recovery of coarse and fine particles selectively reducing pollution, but ignore the pre-mashing process flotation ago. 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 and particle flotation process for resolving Coarse and fine mud pollution problem of great benefit to improve the separation efficiency by 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 content and causing the problem of poor separation efficiency is proposed to effectively address after fine grinding and flotation sludge contaminated run rough serious separation process is simple and effective resources for the promotion of clean coal use is significant.

发明内容 SUMMARY OF THE INVENTION

[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 aims to provide an efficient coal can be achieved with the living body more refractory high ash slime separation process, the coarse flotation tailings to the coarse slime sorting system, will in Coal grinding dissociation; by mashing strengthening resolved after conventional coal flotation mill in fine mud pollution a serious problem, provide a low cost, simple process, low investment, high separation efficiency, economic efficiency significantly sorting of high ash coal slurry process for 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 mashing - 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-grained and coarse flotation tailings slime, size 2-0.25mm, be fed into the spiral sorting machine in order to discharge high-ash coarse waste rock, light products to TBS sorter get into coarse and fine coal, crude slime, the coarse flotation tailings to the coarse slime flotation sorting system can not be recycled to recover the coarse low ash, high ash while removing coarse gangue the tailing and plucking head after crude slime dehydration after grinding dissociation, avoiding the low ash and high gray coarse grinding to bring the energy consumption and the negative effects on the flotation, reducing the mill the amount of high ash coal slime 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, mashing flotation: the floating slime and coal slurry solution based on a different size from the pulp slurry swap the different requirements of energy input into the floating slime will fully guaranteed by mashing time - mashing time is not less than 4min, to ensure the full absorption flotation in coal surface; coal mine slurry fed into the multistage forced stirring within mashing equipment, stirring wheel line speed is not less than 6m / s, so that dissociation fines and flotation collector sufficiently dispersed in the pulp equipment to achieve effective absorption of fine particles of coal and flotation of the float pre-mashing after dissociation of coal slime and be fed into the flotation machine sorting to simplify float 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 mashing - mixing flotation process specifically as follows:

[0010] (I)调浆作业: [0010] (I) mashing jobs:

[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] into the float will be added to a single segment of slime pulp impeller mixing bucket, mashing time is not less than 4min, to ensure the full absorption flotation in coal surface; coal mine slurry was added multistage forced stirring mashing device 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 job:

[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] will float through the slime and coal solution from the pre-mashing after fine slurry mixture through a pipeline to the flotation machine, flotation machine after separation of flotation concentrate obtained and flotation tailings ;

[0014] (3)脱水及精选作业: [0014] (3) dehydration and Featured Job:

[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 gravity into the bowl centrifuge dehydration, recover coarse low ash coal, centrifuge filtrate into the selection of flotation devices - Separated get coal flotation column and tail coal, sludge by selection for reducing fine coal pollution, coal slurry selection and after the end of coal were involved in the subsequent dehydration to give Slime;

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

[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] roughing, respectively, after the end of coal classification cyclone and Desliming sieve dewatering, classifying cyclone overflow sieve with water and mud off selection Tailings went into subsequent dehydration to give Slime, tail coarse coal to the TBS sorting;

[0018] (5)粗煤泥分选作业: [0018] (5) of 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 the end of coal coarse sieve off the mud off the mud after dewatering coarse slime and re-election, re-election of coarse slime size 2-0.25mm, be fed into the spiral sorting machine sorting, spiral light product infeed TBS sorting machines to obtain waste rock, rough and coarse coal slime in slime; after coarse coal slime and gangue after further dehydration as a product, crude slime off the mud into the grinding job dissociation;

[0020] (6)脱泥作业: [0020] (6) off the mud job:

[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; Coarse Slime [0021] TBS sorted into the curved sieves off the mud dehydration, sieve material into the mill were dissociated fine sieve into the water after the merger, together with the return mashing flotation mill operations;

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

[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] The dehydrated crude slime off the mud into the mill after grinding dissociation, and dissociation mill can adjust the size requirements of speed (working speed is 65% -85% of the critical speed) according to the nature of the material, After the mill products accounted for 40-50% -0.074mm part, dissociated after the coal is pumped back to the coal mashing mashing device.

[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] The step (I), and the floating slime and slime in coal grinding operation carried mashing, adding diesel or kerosene as a flotation, the 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 of 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), dehydration and selection of jobs to make adjustments based on coal ash, in the flotation machine is not required for flotation concentrate dewatering qualified selection of links.

[0026] 本发明的积极效果如下: [0026] The positive effects 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 in coal grinding dissociation. 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。 Floating fine for roughing coarsely recovered fine selection of fine mud to reduce pollution; roughing after the end of coal concentrate grade of coarse and coarse slime together to achieve re-election "pull the head" and "tailing" roughing Tailings high ash coal fines directly as a tail. 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, avoiding the coarse coal floatation gangue 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 fine-grained coal slime dissociation alone pulp, matching the high energy input to strengthen the mashing speed effect, desorption equilibrium probability of collision probability to enhance selective adsorption of fine particles and agents; coarse flotation feed under certain conditions mashing speed fully guaranteed mashing time to strengthen its adsorption agents on to improve the recovery of coarse, the first application in coal grinding dissociation alone mashing - mixing flotation process to achieve Efficient separation of coal with the living body of high ash content of more refractory 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, the rougher end of coarse coal slime together with the coarse sorting, grinding coal solution weight checked off, you can re-election recovery of coarse flotation can not be recycled, high ash discharge coarse gangue, in the settlement run while crude also avoids the problem of low ash gray coarse grinding and high energy-consuming and bring adverse effects on flotation, reducing the non-selective grinding of mineral raw amount of high ash fine mud.

[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, according to the requirements of coal ash coal re-election with a link roughing coal dewatering by sedimentation filtration centrifuge coarse low ash recovered filtrate flotation column to reduce the fine selection of fine mud coal pollution.

[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, different size of the floating slime slime and coal grinding after the swap different requirements for the pulp and energy input, matched with different mixing mashing device. 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 the single-stage impeller pulp mixing bucket, fully guaranteed mashing time to ensure adequate flotation adsorbed on the particle surface; fine pulp to a multi-stage forced stirring tune into pulp, the apparatus has a three-tier high speed mixing impeller and stirred to make fine pulp and flotation in the pulp equipment sufficiently dispersed to achieve effective absorption of fine coal and collector agent. 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 quality of drug absorption through the strengthening of the mashing process, increase selectivity coarse and fine particle recovery.

[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 costs, compared with traditional 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 of 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 fine particle of the present invention coal dissociation - Independent mashing - mixing 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: A feed pulp mixing bucket, B coal mashing mixing bucket, C flotation machine, D Tailings pool, E concentrate buffer tank, F grade feed pump, G centrifugal settling filter dehydration machine, H flotation column, I bubble generator, J circulating pump, K grade cyclone, L high-frequency screen, M spiral sorting machine, NTBS sorter, O sieve bend, P mill, Q Coal pool, R Coal feeding pump, I coarser flotation feed pulp, 2 circulating water, 3 pharmaceutical, pulp thickness grain mixture after mashing 4, 5 of flotation concentrate, 6 flotation tailings, 7 cyclone overflow, 8 cyclone underflow, high frequency sieve was 9, 10 high frequency sieve into the water, 11 thick slime, 12 light products, 13 coarse gangue, 14 coarse and fine coal, crude 15 Slime, 16 curved screen under the screen, curved screen sieve material 17, 18 filtrate, 19 coarse low ash coal, coal slurry 20 selection, 21 selection of tail coal, 22 final coal products, 23 Final 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 with reference to embodiments of the present invention will be 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: Figure 1, the present invention fine coal dissociation - Independent mashing - mixing flotation process, swap size from different pulp slurry different energy input into the slurry and coal slime floating solution based on requirements, will float into the slime to the single-stage impeller pulp mixing bucket, fully guaranteed mashing time (conditioning time is not less than 4min) to ensure adequate absorption flotation in coal surface; coal mine slurry infeed multistage forced stirring tune pulp equipment, which has three high speed mixing impeller and stirred (stirring impeller line speed is not less than 6m / s), so that the dissociation fines and flotation in the pulp equipment sufficiently dispersed, achieve effective absorption fine coal and collectors, and when mashing add the appropriate requirements depending on the concentration of circulating water. 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-mashing into floating slime and coal fines dissociation mixture through a pipeline to the flotation machine, after sorting through the flotation machine Flotation Concentrate obtained with flotation tailings. 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 coal ash exceeded, the flotation machine flotation concentrate to the settling filter dewatering centrifuge, recover the coarse low ash coal; centrifuge filtrate to the selection of the flotation device (flotation column ) Separated get coal and tail coal, coal slurry selection and after the end of coal were involved in the subsequent dewatering, this job can make adjustments based on ash content in coal flotation machine flotation eligibility can not 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。 Tailings Tailings after roughing cyclone classifier and Desliming sieve dewatering, classifying cyclone overflow sieve with water and mud off selection Tailings went into subsequent dehydration, Desliming screen off the mud after dehydration coarse-grained and coarse slime re-election (size 2-0.25mm) together to the spiral sorting machine sorting, spiral light products to the TBS sorting machines to obtain waste rock, rough and coarse coal slime in slime. 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。 Coarse slime and gangue enter further dehydration as a product, TBS Slime sorted coarse sieve into the arc off the mud dehydration, the curved screen material into the mill grinding dissociation, and dissociation sieve water After the coal is returned to fine tune the pumping equipment for pulp slurry. 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 independent mashing - mixing flotation process compared to conventional flotation to, under the same conditions of drug consumption, improve clean coal yield of 0.5%, lower 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 Figure 2, the present invention is independent mashing - mixing flotation process comprises feeding the main equipment for pulp mixing bucket A, the coal mashing mixing bucket B, flotation machine C, Tailings pool D, Concentrate buffer tank E, grade feed pump F, sedimentation filtration dewatering centrifuge G, flotation column H, bubble generator 1, circulating pump J, classifying cyclone K, high frequency screen L, spiral sorting machine M , TBS sorter N, curved screen 0, ball mill P, coal pool Q, coal feed pump R. 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 slurry I in coarse pulp stirring impeller single basket A, adding a certain amount of agent 3 in certain stirring speed were fully guaranteed under mashing mashing time; fine middlings dissociated grain slurry is pumped up to paragraph 17 forced stirring tune pulp device B, and add a certain amount of an agent 3 at a certain time under mashing speed input to ensure that high-profile pulp and chemical pulp fines under full dispersion mashing, mashing process can add 2 circulating water to meet pulp and flotation concentration 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。 Pulp mashing grain thickness of 1,17 after sorting through the pipeline to the flotation machine mixing C to give 5 for flotation concentrate and flotation tailings 6, respectively gravity to concentrate buffer tank E and 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。 Flotation Concentrate 5 to settling into Centrifuge machine G coarse low ash coal recovered from 19, 18 to filtrate into the flotation column H in the selection obtained Featured coal slurry 20 and featured 21 Tailings enter subsequent dehydration; in the flotation machine C ash content of coal-compliance is not required for dehydration, selection of work, this time as the final flotation concentrate 5 direct coal-order processing to the rear. 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。 Last 6 Coal slurry is pumped to the buffer after the cyclone classifier classifying K in the bottom stream 8 into the high frequency dewatering screen L carried off the mud, cyclone overflow 7 and screen 10 as the end of the coal into the water subsequent jobs. 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。 High frequency sieve was 9 and 11 into the spiral of coarse slime M sorting machine sorting, to give light product 12 and the coarse gangue 13, light products further to the TBS sorting machine sorting to obtain a crude N Slime 14 and Coarse Slime 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。 Slime coarse sieve into the curved screen 15 O 17 was dehydrated to the mill for grinding O dissociation, under the screen after 16 dissociation fine coal slurry mixing 18 P buffer pool after pumping forced stirring up segment B mashing mashing device.

[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] Although there have been shown and described embodiments of the present invention, those of ordinary skill in the art, it can be understood without departing from the principles and spirit of the present invention may be made in these embodiments, various changes, modifications, substitutions and variations, the scope of the invention defined by the appended claims and their equivalents.

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Classifications
International ClassificationB03B7/00, B03B1/04, B03B1/00
Cooperative ClassificationB03B7/00, B03B1/04, B03B1/00
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