CN102728455A - Combined separation process for gravity concentration and flotation of difficult separation coal slime with high intermediate density material content - Google Patents

Combined separation process for gravity concentration and flotation of difficult separation coal slime with high intermediate density material content Download PDF

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Publication number
CN102728455A
CN102728455A CN2012102351484A CN201210235148A CN102728455A CN 102728455 A CN102728455 A CN 102728455A CN 2012102351484 A CN2012102351484 A CN 2012102351484A CN 201210235148 A CN201210235148 A CN 201210235148A CN 102728455 A CN102728455 A CN 102728455A
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China
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coal
fine
concentration
separation
flotation
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CN2012102351484A
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CN102728455B (en
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王永田
刘炯天
于伟
周开洪
周杰
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China University of Mining and Technology CUMT
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China University of Mining and Technology CUMT
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Abstract

The invention discloses a combined separation process for gravity concentration and flotation of difficult separation coal slime with a high intermediate density material content. A grading device is used for grading; the flotation and fine separation work is directly carried out on the fine grain rough concentration clean coal so as to obtain clean coal and fine-grain-grade tailing coal; the rough grain rough concentration clean coal is subjected to gravity concentration by using a TBS (Teetered Bed Separator) teetered bed so as to obtain the gravity concentration fine coal and gravity concentration tailing coal; the gravity concentration fine coal obtained through the separation of the TBS teetered bed is dehydrated through a dehydrating device so as to obtain final gravity concentration fine coal product and backwater; and the backwater is combined and enters into the fine concentration working of the fine grain rough concentration fine coal. With the adoption of the process, a great deal of high ash gangue mineral is abandoned through the flotation and rough concentration work; the TBS teetered bed gravity concentration process is less influenced by the high ash fine grain gangue; the flotation rough concentration rough grain fine coal can be separated in accordance with the density strictly; the separation efficiency is improved; the difficult separation coal slime with a high intermediate density material content is effectively processed through the combined separation of flotation and gravity concentration; the investment is less; the electricity consumption is small; the operation cost is low; the fine coal yield is high; and the granularity composition of fine coal product is not damaged.

Description

The flotation combined sorting process of difficult separation coal mud gravity treatment of density thing content between senior middle school
Technical field
The present invention relates to a kind of slime separation technology, especially a kind of flotation combined sorting process of difficult separation coal mud gravity treatment that is applicable to density thing content between senior middle school.
Background technology
Density is at 1.4g/cm in coal slime 3-1.8g/cm 3Between the weight of material proportion that accounts for total material surpass at 30% o'clock, it can be called as density thing coal slime between senior middle school.When middle density thing content was high, coal was many with the particle of spoil adhesion, can't coal realized effectively separating with spoil through flotation, caused coal losses in tail coal, and perhaps spoil is entrained in the cleaned coal; When middle density thing content was low, pure coal and pure spoil granule content were high, can effectively separate through simple flotation and produce coal and spoil.Between senior middle school the characteristics of density thing content difficult separation coal mud mainly show the density of coal slime form in big, the several respects such as ash content is high, floatability difference of intermediate density level content, wherein intermediate density thing content is the bottleneck of restriction difficult separation coal mud sorting greatly always.This part coal slime is when flotation; Get into cleaned coal and make that then cleans ash is higher; Gets into tail coal and then cause the rate of recovery to reduce, and coal preparation plant is in order to ensure cleans ash, often through control floating agent consumption, roughly select technology means such as cleaned coal selects again and guarantee that cleans ash is qualified; And the intermediate density thing in the coal slime is finally got in the floating tail-coal, waste resource, reduced the economic benefit of coal preparation plant.This is for the rare fertile coking coal resource of China's high-quality, a kind of especially great waste.Along with the continuous minimizing of the rare fertile coking coal resource reserves of high-quality,, the difficult separation coal mud of density thing content between senior middle school is carried out efficient sorting seem particularly urgent as non-renewable resources.
Conventional flotation process is to send into floatation equipment (flotation column or flotation device) after floatation feed is handled through sizing mixing, and flotation obtains concentrate and tailings, and gets into subsequent product processing operation separately.This technology is mainly used in the conventional sorting that is prone to coal separation mud, and uses for many years in China, and for the sorting of density thing content difficult separation coal mud between senior middle school, the intermediate density thing that it is difficult in effective slime separation makes intermediate density level product often be lost in the tail coal.The efficient sorting technology of density level difficult separation coal mud has become a difficult problem needing solution in the coal resources efficient clean utilization process badly between exploitation senior middle school.
Summary of the invention
Technical problem: the objective of the invention is to overcome the weak point in the prior art, the flotation combined sorting process of difficult separation coal mud gravity treatment of density thing content between the senior middle school of provide that a kind of technology is simple, small investment, the efficiency of separation are high.
Technical scheme: the flotation combined sorting process of difficult separation coal mud gravity treatment of density thing content between senior middle school of the present invention: comprise with size mixing equipment the float coal mud of going into that adds collecting agent, foaming agent is sized mixing; The black water of sizing mixing is introduced the I floatation equipment roughly select operation, obtain I floatation clean coal and I floating tail-coal; Also comprise the steps:
A. the I floatation clean coal is sent into classifying equipoment to carrying out classification, obtain that coarse grain is roughly selected cleaned coal and particulate is roughly selected cleaned coal;
B. coarse grain is roughly selected cleaned coal and send into TBS and disturb bed to carry out gravity separation, obtain gravity treatment tail coal and gravity treatment cleaned coal;
C. the gravity treatment cleaned coal is sent into the I dehydration equipment and dewater, obtain gravity treatment head coal product and backwater;
D. particulate is roughly selected cleaned coal and backwater and send into the II floatation equipment and carry out selected operation, obtain II floatation clean coal and II floating tail-coal;
E. the II floatation clean coal is sent into the II dehydration equipment and dewater, obtain the final election head coal product.
Described classifying equipoment adopts partition size to be 0.125mm or to be the classifying cyclone of 0.15mm or screen cloth cyclone.
Beneficial effect: the present invention utilizes flotation technology earlier the difficult separation coal mud of density thing content between senior middle school to be roughly selected operation; The thick cleaned coal of roughly selecting that will obtain then carries out classification; The thick cleaned coal of coarse grain utilizes TBS to disturb the bed gravity separation after the classification, and the thick cleaned coal of particulate is still handled with floatation.Because a large amount of high grey gangue minerals of jettisoning when roughly selecting, the thick cleaned coal mineral composition of coarse grain improves, and when adopting TBS to disturb the bed gravity separation, the thick cleaned coal of coarse grain can be according to the accurate sorting of density; And the fine grained in the thick cleaned coal utilizes further deliming upgrading of flotation technology.Solved owing to the high coal slime difficulty that causes of the intermediate density thing content thin cement content of high and high ash is selected problem, can improve clean coal recovery, practiced thrift cost simultaneously.The II floatation clean coal can obtain qualified recirculated water after II dehydration equipment processed.Compare with traditional handicraft; Solved the contradiction between the type slime separation product quality and the rate of recovery; With strong points, cost is low, technology is simple, small investment, power consumption is little, operating cost is low, the cleaned coal output capacity is high and do not destroy the granularmetric composition of head coal product, remarkable in economical benefits.
Description of drawings
Fig. 1 is a process chart of the present invention.
The specific embodiment:
Below in conjunction with accompanying drawing one embodiment of the present of invention are done further to describe:
The flotation combined sorting process of difficult separation coal mud gravity treatment of density thing content between senior middle school of the present invention,
A. be that the float coal mud of going into of 60~120g/L is sent into size mixing equipment at first, add collecting agent and foaming agent, the float coal mud of going into that adds collecting agent, foaming agent is sized mixing through size mixing equipment in existing routine techniques ratio with black water concentration;
B. the black water 1 that will size mixing is introduced the I floatation equipment and is roughly selected operation, obtains I floatation clean coal 2 and I floating tail-coal 3, and gained I floatation clean coal rate is 70%~90%;
C. I floatation clean coal 2 is sent into classifying equipoment to carrying out classification, classifying equipoment adopts partition size to be 0.125mm or be the classifying cyclone of 0.15mm or screen cloth cyclone, and classified sizing of equipment obtains that coarse grain is roughly selected cleaned coal 4 and particulate is roughly selected cleaned coal 5;
D. coarse grain is roughly selected cleaned coal 4 and send into TBS and disturb bed to carry out gravity separation, obtain gravity treatment tail coal 6 and gravity treatment cleaned coal 7;
E. gravity treatment cleaned coal 7 is sent into the I dehydration equipment that is made up of high frequency sieve and coal slime centrifuge and dewater, obtain gravity treatment head coal product 8 and backwater 9;
F. particulate is roughly selected cleaned coal 5 and send into the II floatation equipment with backwater 9 and carry out selected operation, obtain II floatation clean coal 10 and II floating tail-coal 11;
G. II floatation clean coal 10 is sent into the II dehydration equipment and dewater, filtrating is made recirculated water, the cleaned coal 12 after the dehydration of II dehydration equipment and be the head coal product of final election from the gravity treatment head coal product 8 of I dehydration equipment; From I dehydration equipment I floating tail-coal 3 that flows out and the II floating tail-coal 11 that the II floatation equipment flows plinth is final tail coal product.

Claims (2)

1. the flotation combined sorting process of difficult separation coal mud gravity treatment of density thing content between a senior middle school comprises with size mixing equipment the float coal mud of going into that adds collecting agent, foaming agent is sized mixing; The black water of sizing mixing (1) is introduced the I floatation equipment roughly select operation, obtain I floatation clean coal (2) and I floating tail-coal (3); It is characterized in that, also comprise the steps:
A. I floatation clean coal (2) is sent into classifying equipoment to carrying out classification, obtain that coarse grain is roughly selected cleaned coal (4) and particulate is roughly selected cleaned coal (5);
B. coarse grain is roughly selected cleaned coal (4) and send into TBS and disturb bed to carry out gravity separation, obtain gravity treatment tail coal (6) and gravity treatment cleaned coal (7);
C. gravity treatment cleaned coal (7) is sent into the I dehydration equipment and dewater, obtain gravity treatment head coal product (8) and backwater (9);
D. particulate is roughly selected cleaned coal (5) and backwater (9) and send into the II floatation equipment and carry out selected operation, obtain II floatation clean coal (10) and II floating tail-coal (11);
E. II floatation clean coal (10) is sent into the II dehydration equipment and dewater, obtain final election head coal product (12).
2. the flotation combined sorting process of difficult separation coal mud gravity treatment of density thing content between senior middle school according to claim 1 is characterized in that: described classifying equipoment adopts partition size to be 0.125mm or to be the classifying cyclone of 0.15mm or screen cloth cyclone.
CN 201210235148 2012-07-09 2012-07-09 Combined separation process for gravity concentration and flotation of difficult separation coal slime with high intermediate density material content Expired - Fee Related CN102728455B (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102962122A (en) * 2012-12-03 2013-03-13 中国矿业大学 Deep preparation technology of coal for direct coal liquefacation
CN103028486A (en) * 2012-12-21 2013-04-10 中国矿业大学 High and medium density coarse slime separation process
CN103212479A (en) * 2013-05-02 2013-07-24 杨高灵 Tail coal recycling utilization
CN103752414A (en) * 2014-01-07 2014-04-30 中国矿业大学(北京) Pulp mixing reinforced deep flotation technology process
CN104668108A (en) * 2014-12-29 2015-06-03 山东东山王楼煤矿有限公司 Flotation device and method for coal slime
CN104722390A (en) * 2015-03-02 2015-06-24 中国矿业大学 Coking middling coal dms-flotation combined separation process
CN104741211A (en) * 2015-03-02 2015-07-01 中国矿业大学 Grading size mixing and bulk flotation separation process
CN109731697A (en) * 2019-03-14 2019-05-10 中国矿业大学 A kind of width grade floatation system and technique
CN110201790A (en) * 2019-06-21 2019-09-06 中国矿业大学 A kind of the sorting recovery system and sorting recovery process of width grade coal slime
CN113210125A (en) * 2021-05-17 2021-08-06 鄂托克旗建元洗煤有限责任公司 Method and system for partial middling heavy medium rewashing

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4189103A (en) * 1978-03-10 1980-02-19 International Minerals & Chemical Corporation Method of beneficiating phosphate ores
CN101757982A (en) * 2010-03-09 2010-06-30 中国矿业大学 Coal slime floating process
CN102357405A (en) * 2011-08-21 2012-02-22 太原艾柯夫选煤技术有限公司 Middling coal crushing, recleaning and quality improving method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4189103A (en) * 1978-03-10 1980-02-19 International Minerals & Chemical Corporation Method of beneficiating phosphate ores
CN101757982A (en) * 2010-03-09 2010-06-30 中国矿业大学 Coal slime floating process
CN102357405A (en) * 2011-08-21 2012-02-22 太原艾柯夫选煤技术有限公司 Middling coal crushing, recleaning and quality improving method

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
张振等: "我国焦煤资源深度洗选回收工艺路线的探索", 《选煤技术》 *
田晓明等: "原料煤中间密度磨碎-浮选的探索试验", 《洁净煤技术》 *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102962122A (en) * 2012-12-03 2013-03-13 中国矿业大学 Deep preparation technology of coal for direct coal liquefacation
CN103028486A (en) * 2012-12-21 2013-04-10 中国矿业大学 High and medium density coarse slime separation process
CN103212479A (en) * 2013-05-02 2013-07-24 杨高灵 Tail coal recycling utilization
CN103212479B (en) * 2013-05-02 2015-09-09 杨高灵 Tail coal is recycled method
CN103752414A (en) * 2014-01-07 2014-04-30 中国矿业大学(北京) Pulp mixing reinforced deep flotation technology process
CN104668108A (en) * 2014-12-29 2015-06-03 山东东山王楼煤矿有限公司 Flotation device and method for coal slime
CN104722390A (en) * 2015-03-02 2015-06-24 中国矿业大学 Coking middling coal dms-flotation combined separation process
CN104741211A (en) * 2015-03-02 2015-07-01 中国矿业大学 Grading size mixing and bulk flotation separation process
CN109731697A (en) * 2019-03-14 2019-05-10 中国矿业大学 A kind of width grade floatation system and technique
CN110201790A (en) * 2019-06-21 2019-09-06 中国矿业大学 A kind of the sorting recovery system and sorting recovery process of width grade coal slime
CN113210125A (en) * 2021-05-17 2021-08-06 鄂托克旗建元洗煤有限责任公司 Method and system for partial middling heavy medium rewashing

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