CN102500472A - Concentrating, filtering and dehydrating process for flotation clean coal - Google Patents
Concentrating, filtering and dehydrating process for flotation clean coal Download PDFInfo
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- CN102500472A CN102500472A CN2011103176011A CN201110317601A CN102500472A CN 102500472 A CN102500472 A CN 102500472A CN 2011103176011 A CN2011103176011 A CN 2011103176011A CN 201110317601 A CN201110317601 A CN 201110317601A CN 102500472 A CN102500472 A CN 102500472A
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Abstract
The invention discloses a concentrating, filtering and dehydrating process for flotation clean coal. The process comprises the following steps of: feeding flotation clean coal into a concentrator for performing primary dehydration and concentration; feeding a bottom flow product concentrated by using the concentrator into a pressure filter for performing secondary dehydration; feeding an overflow product of the concentrator into a foam and water separator for separating to obtain clean coal and a water product; feeding the water product into a circulating water system; mixing the clean coal foam with the bottom flow of the concentrator, and feeding into the pressure filter for dehydrating to obtain a clean coal product and a filtrate; and returning the filtrate to the concentrator through a pipeline for continually concentrating. The process is mainly specific to dehydration treatment of coal slurry, in particular to dehydration treatment of flotation clean coal, difficulty in dehydrating the flotation clean coal caused by fine particle size and low concentration is eliminated, the treatment capability of the pressure filter is enhanced greatly, the water treatment process of a coal slurry water system is improved, and a good external environment is provided for complete flotation operation. The process is simple, and has small investment, low running cost and a good concentrating effect.
Description
Technical field
The present invention relates to the black water processing technology field, especially a kind of dewatering process that is used for floatation clean coal.
Background technology
In order to satisfy the many kinds in coal market, high-quality requirement, coal production enterprise is striving that enlarging raw coal goes into to wash ability, when reducing the product ash content of coal, takes various effective measures to reduce the moisture of product.But because the raising of mine coal-cutting mechanization degree, the content of powder coal and coal slime is increase trend in the raw coal, makes floatation clean coal moisture increasing to the influence of total moisture of cleaned coal.The moisture of cleaned coal height had both influenced the performance of enterprises also have been wasted social resources and has increased energy resource consumption, does not conform to the state basic policy of energy-saving and emission-reduction.The increase of coal slurry content reclaims, realizes that Separation of Solid and Liquid has increased difficulty also for the processing of black water and coal slime dewatering.And black water is handled and the coal slime dewatering recovery is the important step that coal preparation plant produces, and is to realize that Separation of Solid and Liquid, reduction wash water concentration reach the key of one-level wash water closed cycle.
The conventional process of floatation clean coal dehydration at present is comparatively single; Only floatation clean coal is fed dehydration equipment; Perhaps make up use, as screen-bowl centrifuge and filter press being united use, the moisture of raw granulate fraction and fine fraction in the difference separating flotation cleaned coal according to the dehydration equipment dewatering; But because system energy consumption is big, disposal ability is little etc., and reason is used less.Conventional cleaned coal dehydration equipment mainly is filter press, pressing filter, screen-bowl centrifuge etc., and it is better that filter press is handled the fine slime effect, but disposal ability is little, the difficult requirement that adapts to coal preparation plant's large scale development and the dehydration of a large amount of floatation clean coal; Pressing filter is comparatively responsive to the variation of material size and concentration, and when the granularmetric composition of floatation clean coal is that fine grained is taken as the leading factor or concentration when being lower than 200g/L, its disposal ability descends greatly; Screen-bowl centrifuge also receives certain limitation because of reasons such as maintenance capacity is big, filtrate water concentration height in floatation clean coal dehydration application facet.
Along with the raising of mechanical coal mining degree, the content of coal slime is more and more in the coal, and develops to the direction of person's particulate.Along with the progress of coal preparation technology, heavily the be situated between syllogic sorting mode development of sorting, separation of coarse slime, coal slime flotation of piece smalls is very fast, and the floatation feed granularity develops towards microfine; Floatation clean coal fine size, concentration are low, are seriously restricting the disposal ability of pressure filtration machine equipment, in existing production system; The limitation that pressing filter is handled the cleaned coal ability has usually limited normally carrying out of flotation operation, if the cleaned coal output of flotation strengthens, the pressing filter disposal ability causes the flotation concentrate foam often excessive inadequately; A large amount of cleaned coal losses; Also influenced the normal emersion of floatation clean coal, a large amount of cleaned coal are lost in the floating tail-coal, so the dehydration problem of floatation clean coal not only relates to the moisture of head coal product; And had influence on the flotation operation link, so the dehydration of floatation clean coal thickening filtration is an on-the-spot anxious big problem to be solved.
Summary of the invention
Technical problem: it is simple that the object of the invention has provided a kind of technology, and thickening efficient is high, low cost, effective floatation clean coal thickening technology.
Technical scheme: floatation clean coal thickening technology of the present invention; First-selected floatation clean coal is fed carried out primary dewatering and concentrated in the thickener; Underflow product after thickener concentrates feeds pressing filter and carries out second dehydration, and the overflow product of thickener feeds in foam and the separator and separates, and obtains cleaned coal foam and aquatic products; Aquatic products are fed circulation; With the cleaned coal foam with feed the pressing filter dehydration after thickener underflow mixes, obtain head coal product and filtrating, through pipeline filtrating is returned thickener and proceeds to concentrate operation.
Underflow product design after said thickener concentrates is controlled at more than the 350g/L.
Beneficial effect:The present invention includes concentrated operation, foam and separated form water operation and floatation clean coal filtration operation three parts of floatation clean coal.Adopt the coal slime concentrator; And cooperation foam and separator; Floatation clean coal is carried out once concentration through thickener earlier; Overflow after concentrating gets into foam and separator, and foam mixes with the underflow of concentrated operation with the froth pulp of separator and feeds the pressurization filter press, and the aquatic products of foam and separator are as coal preparation plant's recirculated water use.The filtrate water of pressing filter feeds thickener and concentrates, and the cleaned coal after the pressing filter dehydration is directly as final head coal product.Floatation clean coal thickening filtration dewatering process has solved that floatation clean coal is low because of concentration, granularmetric composition carefully causes a dehydration difficult problem, has increased the operating efficiency and the disposal ability of pressing filter greatly.Be primarily aimed at coal slime dewatering and handle the especially processed of floatation clean coal; Solved floatation clean coal because of fine size, the low dehydration difficulty that causes of concentration; Improved the disposal ability of pressing filter greatly; Improved the slime water system water treatment procedure, good external environment condition is provided for flotation operation improves.Its technology is simple, small investment, and operating cost is low, and concentrated effect is good.
Description of drawings
Fig. 1 is a floatation clean coal thickening process chart of the present invention.
Fig. 2 is a floatation clean coal thickening device structure sketch map of the present invention.
Among the figure: thickener A, thickener underflow pump B, foam and separator C, cleaned coal tempering tank D, cleaned coal delivery pump E, pressing filter F; Floatation clean coal 1, thickener underflow 2, thickener overflow 3, cleaned coal foam 4, recirculated water 5, mixing cleaned coal 6, pressing filter filtrating 7, head coal product 8.
The specific embodiment
Below in conjunction with accompanying drawing embodiments of the invention are done further to describe:
As shown in Figure 1; Floatation clean coal thickening technology of the present invention: first-selected floatation clean coal is fed carried out primary dewatering and concentrated in the thickener; Underflow product after thickener concentrates feeds pressing filter and carries out second dehydration, and the underflow product design after thickener concentrates is controlled at more than the 350g/L.Be difficult to eliminate owing to contain a large amount of bubbles and foam in the overflow, must carry out separating of foam and water this moment, reclaim cleaned coal, reduce the concentration of overflow water, it is used as recirculated water.The overflow product of thickener fed in foam and the separator separate, separate obtaining cleaned coal foam and aquatic products through foam with separator, aquatic products are fed circulation, can be used as recirculated water and use.With the cleaned coal foam with feed the pressing filter dehydration after the thickener underflow product mixes, obtain head coal product and filtrating, through pipeline filtrating is returned thickener and proceeds to concentrate operation.
As shown in Figure 2; Floatation clean coal 1 is fed thickener A; Floatation clean coal 1 obtains thickener underflow product 2 and thickener overflow 3 after thickener A concentrates; Thickener overflow 3 flows into foam certainly and separator C carries out foam and separated form water process, and underflow product 2 is delivered to cleaned coal tempering tank D by thickener underflow pump B; Foam and separator C are separated into cleaned coal foam 4 and recirculated water 5 with thickener overflow 2; Cleaned coal foam 4 mixes with thickener underflow 2 from flowing to concentrate bucket D; It mixes cleaned coal 6 and is delivered to pressing filter F dehydration by cleaned coal delivery pump E, and recirculated water 5 directly uses as coal preparation plant's coal separation water; Mix cleaned coal 6 and after pressing filter F dehydration, obtain head coal product 8 and pressing filter filtrating 7, pressing filter filtrating 7 is from flowing in the thickener 1; Go round and begin again, repeat above-mentioned steps until accomplishing all concentrated operations.
Claims (2)
1. floatation clean coal thickening technology; It is characterized in that: first-selected floatation clean coal is fed carried out primary dewatering and concentrated in the thickener; Underflow product after thickener concentrates feeds pressing filter and carries out second dehydration, and the overflow product of thickener feeds in foam and the separator and separates, and obtains cleaned coal foam and aquatic products; Aquatic products are fed circulation; With the cleaned coal foam with feed the pressing filter dehydration after thickener underflow mixes, obtain head coal product and filtrating, through pipeline filtrating is returned thickener and proceeds to concentrate operation.
2. floatation clean coal thickening technology according to claim 1 is characterized in that: said underflow product design after thickener concentrates is controlled at more than the 350g/L.
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| CN2011103176011A CN102500472A (en) | 2011-10-19 | 2011-10-19 | Concentrating, filtering and dehydrating process for flotation clean coal |
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| CN2011103176011A CN102500472A (en) | 2011-10-19 | 2011-10-19 | Concentrating, filtering and dehydrating process for flotation clean coal |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102872645A (en) * | 2012-10-18 | 2013-01-16 | 中煤科工集团武汉设计研究院 | Long-distance pipeline coal conveying terminal dehydration system device and dehydration method |
| CN103543053A (en) * | 2013-10-21 | 2014-01-29 | 七台河宝泰隆煤化工股份有限公司 | Dewaterer for floatation of concentrate samples |
| 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 |
| CN109365141A (en) * | 2018-11-28 | 2019-02-22 | 中国矿业大学 | A kind of coal slime floating process that floating agent recycles |
| CN112844860A (en) * | 2020-12-31 | 2021-05-28 | 中赟国际工程有限公司 | Coal slime separator |
| CN115069425A (en) * | 2022-07-20 | 2022-09-20 | 江苏仕晟工业技术研究院有限公司 | Flotation device pan feeding ore pulp detects adjusting device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4802976A (en) * | 1988-01-04 | 1989-02-07 | Miller Francis G | Method for recovering fine clean coal |
| CN1864802A (en) * | 2006-04-25 | 2006-11-22 | 开滦精煤股份有限公司范各庄矿业分公司 | Process for dehydrating floatation coal |
| CN101024211A (en) * | 2007-03-26 | 2007-08-29 | 开滦(集团)有限责任公司煤业分公司 | Floating tail-coal graded recovering process |
| CN102100985A (en) * | 2009-12-17 | 2011-06-22 | 鞍钢集团矿业公司 | Novel tailings dewatering process |
-
2011
- 2011-10-19 CN CN2011103176011A patent/CN102500472A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4802976A (en) * | 1988-01-04 | 1989-02-07 | Miller Francis G | Method for recovering fine clean coal |
| CN1864802A (en) * | 2006-04-25 | 2006-11-22 | 开滦精煤股份有限公司范各庄矿业分公司 | Process for dehydrating floatation coal |
| CN101024211A (en) * | 2007-03-26 | 2007-08-29 | 开滦(集团)有限责任公司煤业分公司 | Floating tail-coal graded recovering process |
| CN102100985A (en) * | 2009-12-17 | 2011-06-22 | 鞍钢集团矿业公司 | Novel tailings dewatering process |
Non-Patent Citations (2)
| Title |
|---|
| 张运友: "优化株洲选煤厂煤泥水处理工艺探讨", 《选煤技术》 * |
| 许建中等: "吕梁山煤电公司洗煤厂浮选精煤脱水实践", 《选煤技术》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102872645A (en) * | 2012-10-18 | 2013-01-16 | 中煤科工集团武汉设计研究院 | Long-distance pipeline coal conveying terminal dehydration system device and dehydration method |
| CN103543053A (en) * | 2013-10-21 | 2014-01-29 | 七台河宝泰隆煤化工股份有限公司 | Dewaterer for floatation of concentrate samples |
| CN103543053B (en) * | 2013-10-21 | 2015-10-21 | 七台河宝泰隆煤化工股份有限公司 | For the hydroextractor of flotation concentrate sample |
| 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 |
| CN109365141A (en) * | 2018-11-28 | 2019-02-22 | 中国矿业大学 | A kind of coal slime floating process that floating agent recycles |
| CN109365141B (en) * | 2018-11-28 | 2020-06-19 | 中国矿业大学 | Coal slime flotation process with recycling flotation agent |
| CN112844860A (en) * | 2020-12-31 | 2021-05-28 | 中赟国际工程有限公司 | Coal slime separator |
| CN115069425A (en) * | 2022-07-20 | 2022-09-20 | 江苏仕晟工业技术研究院有限公司 | Flotation device pan feeding ore pulp detects adjusting device |
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Application publication date: 20120620 |