CN102284354A - Coarse slime separating process - Google Patents
Coarse slime separating process Download PDFInfo
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- CN102284354A CN102284354A CN2011102681282A CN201110268128A CN102284354A CN 102284354 A CN102284354 A CN 102284354A CN 2011102681282 A CN2011102681282 A CN 2011102681282A CN 201110268128 A CN201110268128 A CN 201110268128A CN 102284354 A CN102284354 A CN 102284354A
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- 238000000034 method Methods 0.000 title abstract description 5
- 239000003245 coal Substances 0.000 claims abstract description 53
- 239000012141 concentrate Substances 0.000 claims abstract description 13
- 238000000926 separation method Methods 0.000 claims description 28
- 230000018044 dehydration Effects 0.000 claims description 17
- 238000006297 dehydration reaction Methods 0.000 claims description 17
- 238000003825 pressing Methods 0.000 claims description 17
- 238000005188 flotation Methods 0.000 claims description 13
- 238000005516 engineering process Methods 0.000 claims description 10
- 239000010866 blackwater Substances 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000007667 floating Methods 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 12
- 238000002360 preparation method Methods 0.000 description 10
- 239000002562 thickening agent Substances 0.000 description 3
- 239000006227 byproduct Substances 0.000 description 2
- 230000003203 everyday effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to a coarse slime separating process, which is characterized in that: jigging head coal is dehydrated by a dehydrating sieve, slime below the sieve enters a whirlcone, overflow of the whirlcone enters a floatation system, underflow of the whirlcone enters a slime separating machine, partial concentrate which is separated by the slime separating machine is previously dehydrated and deslimed by a vibration arc sieve, fine coal product enters commodity fine coal, partial concentrate directly enters a pressurizing filter to be dehydrated together with the floated concentrated, and the dehydrated product enters the commodity fine coal; and tailing is directly mixed with commodity fine crude coal after being dehydrated. The process is simple, the pressurizing filter can be prevented from working at full load or overload for a long time because of the thinness of the floating granularity, the pressure produced by the pressurizing filter can be reduced, so the entire production process can save labor and is safe, and the working efficiency is high; and the tailing after the coarse slime is separated is mixed with the commodity fine crude coal, so the quality interference can be avoided, and not only can the stability of the quality of the commodity fine crude coal be guaranteed, but also the economic benefit can be greatly improved.
Description
Technical field
The present invention relates to a kind of coal preparation plant separation of coarse slime technology.
Background technology
Coal preparation plant is to be the processing factory of purpose to improve Coal Quality, to remove coal impurity.The ash content of product (i.e. burning back residue) is the most important index of coal preparation plant.Along with the ature of coal of mine changes and the technological transformation of coal preparation plant,, ash content low between the grade efficiency of separation of gravity treatment and flotation sorting boundary (0.5mm) big (12-18%), granularity slightly the ratio of the coarse slime of (0.2-4mm) improve gradually; Separation of coarse slime is concerning the main economic and technical norms of coal preparation plant, is the main direction of studying at present.
Present known separation of coarse slime link generally adopts the separation of coarse slime machine to carry out.The separation of coarse slime machine produces two kinds of products: a kind of is head coal product, and ash content is low, value is big, is the major product of coal preparation plant; A kind of is product from failing, and ash content is higher, value is lower, is the byproduct of coal preparation plant.
The separation of coarse slime technology of prior art is that jigging cleaned coal black water under the sieve after the dewatering screen dehydration enters hydrocyclone, floatation system is advanced in the overflow of cyclone, underflow enters into the separation of coarse slime machine, the overflow of separation of coarse slime machine enters into the dehydration of vibration sieve bend predictive desliming, screenings enters into spitzkasten, finally enter floatation system and carry out flotation, oversize enters the coal slime centrifuge and dewaters, product after the dehydration mixes in the commodity fine cleaned coal and sells as fine cleaned coal, centrifugate enters into spitzkasten, finally enters floatation system and carries out flotation; The mine tailing of separation of coarse slime machine directly enters thickener, and the thickener overflow is directly as the coal washing cycling use of water, and underflow goes the filter press press filtration to become coal slime, as by-product sale.
The subject matter that existing technology exists is: the one, and the grain sorting that particle in the coarse slime is thicker becomes fine cleaned coal, particulate all enters floatation system in screenings and the centrifugate, bring pressure for the processing of flotation, cause the rising of floatation system black water concentration, the problem that the flotation device disposal ability is not enough and flotation efficiency reduces exposes, main is that the pressing filter material size is attenuated, cause the prolongation in pressing filter discharge cycle, the increase of energy resource consumption makes it become the bottleneck of restriction floatation system capability improving; The 2nd, the mine tailing of slime separation machine directly enters thickener, has not only increased the burden of press filteration system, more mine tailing is sold as the low coal slime of sales value, and it is the highest that the economic benefit of separation of coarse slime system is not reached, the economic benefit of loss coal preparation plant.
Summary of the invention
The purpose of this invention is to provide a kind of separation of coarse slime technology,, farthest improve coal preparation plant's economic benefit to overcome the problem that existing technology exists.
Implementation procedure of the present invention is such: jigging cleaned coal black water under the sieve after the dewatering screen dehydration enters cyclone, floatation system is advanced in the overflow of cyclone, underflow enters into the slime separation machine, through the part that the separation of coarse slime machine sub-elects concentrate is dewatered desliming in advance through vibration sieve bend after, oversize enters centrifuge dewatering, fine cleaned coal product after the dehydration enters in the commodity fine cleaned coal, another part concentrate directly enters into the pan feeding pond of pressing filter, enter pressing filter with flotation concentrate and dewater, the product after the dehydration enters in the commodity fine cleaned coal; The mine tailing of slime separation machine directly enters the coarse slime centrifuge and dewaters, and the product after the dehydration directly mixes commodity end raw coal; The centrifugate of black water and centrifuge enters spitzkasten together under the vibration sieve bend sieve, finally enters floatation system and carries out flotation.
Good effect of the present invention is: technology is simple, realizes easily; With the debris tube of separation of coarse slime machine be communicated to transform before the feeding pipe of coarse slime centrifuge get final product, do not need extra equipment and power, having improved the material size of pressing filter forms, shorten the discharge cycle of pressing filter, the pressing filter of having avoided being used for floating cleaned coal dehydration is at full capacity even the duty of excess load for a long time, to a certain degree alleviating the situation that the pressing filter restriction is produced, alleviate the pressurization filter press and produced pressure, make the whole production link economize the laborsaving safety again of people, high efficiency; Simultaneously the mine tailing behind the separation of coarse slime mixes in the raw coal of commodity end, can avoid the problem of commodity end raw coal quality interference, has both guaranteed that stablizing of commodity end raw coal qualities was qualified, bigger again raising economic benefit.
Description of drawings
Accompanying drawing 1 is a process chart of the present invention.
The specific embodiment
As shown in Figure 1, jigging cleaned coal black water under the sieve after the dewatering screen dehydration enters cyclone, floatation system is advanced in the overflow of cyclone, underflow enters into the slime separation machine, through the part that the separation of coarse slime machine sub-elects concentrate is dewatered desliming in advance through vibration sieve bend after, oversize enters centrifuge dewatering, fine cleaned coal product after the dehydration enters in the commodity fine cleaned coal, another part concentrate directly enters into the pan feeding pond of pressing filter, enter pressing filter with flotation concentrate and dewater, the product after the dehydration enters in the commodity fine cleaned coal; The mine tailing of slime separation machine directly enters former coarse slime centrifuge and dewaters, and the product after the dehydration directly mixes commodity end raw coal; The centrifugate of black water and centrifuge enters spitzkasten together under the vibration sieve bend sieve, finally enters floatation system and carries out flotation.
The concentrate of separation of coarse slime machine is partly squeezed into the pressing filter dehydration, improved flotation concentrate granularmetric composition, the discharge cycle of pressing filter is reduced to about 90s/ time by about 120s/ time that reachs the last, improve the disposal ability 25% of pressing filter, can solve particulate enters floatation system and causes pressing filter discharge cycle stretch-out, disposal ability reduces, and avoids it to become the bottleneck problem of restriction floatation system capability improving; Consider from energy-conservation angle, 1 pressing filter of normal operation 268.5kw that need consume energy, minimizings energy consumption is 268.5 * 25%=67.13kw, promptly presses 19 hours the applicant unit's slurry circulating system available machine times every day, whole year production was calculated 840,000 degree/years of i.e. using electricity wisely in 330 days.
The mine tailing of separation of coarse slime machine is sold through directly mixing in the last raw coal after the coarse slime centrifuge dewatering, does not need extra mine tailing treatment facility and power, has solved the problem of last raw coal quality interference, has farthest improved the economic benefit of coal preparation plant.
With the applicant unit is example, and 0.2-4mm coarse slime content remains on about 40t/h substantially, and the mine tailing amount accounts for about 25%, and 5500-5800cal/g end raw coal duty-unpaid price is about 620 yuan/ton, and the coal slime duty-unpaid price is about 176 yuan/ton.By 18 hours available machine times every day, whole year production was calculated in 330 days, and according to the knowhow statistics, the mine tailing in 1 year nearly 25% can mix last raw coal.
The original debris economic benefit is: ten thousand yuan of 330 * 18 * 40 * 176 * 0.25=1045.
Adopt this technology mine tailing economic benefit to be: ten thousand yuan of 330 * 18 * 40 * 620 * 0.25=3683.
Increasing economic benefit newly is: ten thousand yuan of 3683-1045=2638.
Claims (1)
1. separation of coarse slime technology, it is characterized in that: jigging cleaned coal black water under the sieve after the dewatering screen dehydration enters cyclone, floatation system is advanced in the overflow of cyclone, underflow enters into the slime separation machine, through the part that the separation of coarse slime machine sub-elects concentrate is dewatered desliming in advance through vibration sieve bend after, oversize enters centrifuge dewatering, fine cleaned coal product after the dehydration enters in the commodity fine cleaned coal, another part concentrate directly enters into the pan feeding pond of pressing filter, enter pressing filter with flotation concentrate and dewater, the product after the dehydration enters in the commodity fine cleaned coal; The mine tailing of slime separation machine directly enters the coarse slime centrifuge and dewaters, and the product after the dehydration directly mixes commodity end raw coal; The centrifugate of black water and centrifuge enters spitzkasten together under the vibration sieve bend sieve, finally enters floatation system and carries out flotation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110268128 CN102284354B (en) | 2011-09-13 | 2011-09-13 | Coarse slime separating process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110268128 CN102284354B (en) | 2011-09-13 | 2011-09-13 | Coarse slime separating process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102284354A true CN102284354A (en) | 2011-12-21 |
| CN102284354B CN102284354B (en) | 2013-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110268128 Expired - Fee Related CN102284354B (en) | 2011-09-13 | 2011-09-13 | Coarse slime separating process |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102784714A (en) * | 2012-08-23 | 2012-11-21 | 永城煤电控股集团有限公司 | Treatment process of coal slime washing tailings |
| CN103372495A (en) * | 2012-04-13 | 2013-10-30 | 金易通科技(北京)股份有限公司 | Coarse slime separating system and method |
| CN103464272A (en) * | 2013-09-02 | 2013-12-25 | 山东科技大学 | Coarse coal slime two-section water medium sorting method |
| CN104162479A (en) * | 2014-06-12 | 2014-11-26 | 煤炭工业济南设计研究院有限公司 | Movable sieve waste rock discharge system slime water treatment process and device |
| CN104307624A (en) * | 2014-08-27 | 2015-01-28 | 山东科技大学 | Coal slime recovery device and process |
| CN104588404A (en) * | 2014-11-27 | 2015-05-06 | 中国矿业大学 | Washing selecting repairing treatment process for organic contaminated soil |
| CN105879445A (en) * | 2016-05-31 | 2016-08-24 | 中国矿业大学(北京) | Slime water two-stage filtering technology |
| CN105964392A (en) * | 2016-06-20 | 2016-09-28 | 中国神华能源股份有限公司 | Coal dressing and desliming system |
| CN109604047A (en) * | 2018-12-20 | 2019-04-12 | 新矿内蒙古能源有限责任公司洗煤分公司 | It is a kind of based on the tailing recycling technique optimized product structure and system |
| CN109701731A (en) * | 2019-01-14 | 2019-05-03 | 乌拉特中旗毅腾矿业有限责任公司 | A kind of cleaned coal flotation clean utilization treatment process |
| CN110193421A (en) * | 2019-06-13 | 2019-09-03 | 华北理工大学 | A kind of coarse slime ore-dressing technique of heavy floating combined sorting |
| CN111116225A (en) * | 2019-03-14 | 2020-05-08 | 西安煤科动力科技有限公司 | Microporous light sintered brick and preparation method thereof |
| CN112844860A (en) * | 2020-12-31 | 2021-05-28 | 中赟国际工程有限公司 | Coal slime separator |
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| GB957724A (en) * | 1959-08-11 | 1964-05-13 | Prod Chim D Auby Soc D | Improvements in processes and apparatus for the wet treatment of coal |
| CN1948434A (en) * | 2006-11-10 | 2007-04-18 | 张春林 | Two stage dewatering technology of fine coal mud |
| RU2407594C1 (en) * | 2009-06-29 | 2010-12-27 | Алексей Андреевич Бондаренко | Gravity method of removing high-ash slime from coal dressing muddy water circuit |
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2011
- 2011-09-13 CN CN 201110268128 patent/CN102284354B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB957724A (en) * | 1959-08-11 | 1964-05-13 | Prod Chim D Auby Soc D | Improvements in processes and apparatus for the wet treatment of coal |
| CN1948434A (en) * | 2006-11-10 | 2007-04-18 | 张春林 | Two stage dewatering technology of fine coal mud |
| RU2407594C1 (en) * | 2009-06-29 | 2010-12-27 | Алексей Андреевич Бондаренко | Gravity method of removing high-ash slime from coal dressing muddy water circuit |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103372495A (en) * | 2012-04-13 | 2013-10-30 | 金易通科技(北京)股份有限公司 | Coarse slime separating system and method |
| CN103372495B (en) * | 2012-04-13 | 2015-09-23 | 金易通科技(北京)股份有限公司 | A kind of separation of coarse slime system and method for separating |
| CN102784714A (en) * | 2012-08-23 | 2012-11-21 | 永城煤电控股集团有限公司 | Treatment process of coal slime washing tailings |
| CN103464272A (en) * | 2013-09-02 | 2013-12-25 | 山东科技大学 | Coarse coal slime two-section water medium sorting method |
| CN103464272B (en) * | 2013-09-02 | 2016-04-13 | 山东科技大学 | A kind of coarse slime two sections of water Jie method for separating |
| CN104162479A (en) * | 2014-06-12 | 2014-11-26 | 煤炭工业济南设计研究院有限公司 | Movable sieve waste rock discharge system slime water treatment process and device |
| CN104307624A (en) * | 2014-08-27 | 2015-01-28 | 山东科技大学 | Coal slime recovery device and process |
| CN104588404B (en) * | 2014-11-27 | 2017-07-07 | 中国矿业大学 | A kind of washing repair process technique of organic polluted soil |
| CN104588404A (en) * | 2014-11-27 | 2015-05-06 | 中国矿业大学 | Washing selecting repairing treatment process for organic contaminated soil |
| CN105879445A (en) * | 2016-05-31 | 2016-08-24 | 中国矿业大学(北京) | Slime water two-stage filtering technology |
| CN105879445B (en) * | 2016-05-31 | 2018-01-02 | 中国矿业大学(北京) | Two sections of filtering techniques of black water |
| CN105964392A (en) * | 2016-06-20 | 2016-09-28 | 中国神华能源股份有限公司 | Coal dressing and desliming system |
| CN109604047A (en) * | 2018-12-20 | 2019-04-12 | 新矿内蒙古能源有限责任公司洗煤分公司 | It is a kind of based on the tailing recycling technique optimized product structure and system |
| CN109701731A (en) * | 2019-01-14 | 2019-05-03 | 乌拉特中旗毅腾矿业有限责任公司 | A kind of cleaned coal flotation clean utilization treatment process |
| CN111116225A (en) * | 2019-03-14 | 2020-05-08 | 西安煤科动力科技有限公司 | Microporous light sintered brick and preparation method thereof |
| CN110193421A (en) * | 2019-06-13 | 2019-09-03 | 华北理工大学 | A kind of coarse slime ore-dressing technique of heavy floating combined sorting |
| CN112844860A (en) * | 2020-12-31 | 2021-05-28 | 中赟国际工程有限公司 | Coal slime separator |
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| CN102284354B (en) | 2013-01-16 |
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