CN102824955A - Method for using refined coal magnetic separator tailings for flotation water-spraying foam removal - Google Patents
Method for using refined coal magnetic separator tailings for flotation water-spraying foam removal Download PDFInfo
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- CN102824955A CN102824955A CN201210336787XA CN201210336787A CN102824955A CN 102824955 A CN102824955 A CN 102824955A CN 201210336787X A CN201210336787X A CN 201210336787XA CN 201210336787 A CN201210336787 A CN 201210336787A CN 102824955 A CN102824955 A CN 102824955A
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Abstract
The invention discloses a method for using refined-coal magnetic separator tailings for flotation water-spraying foam removal. The method provides an improvement method aiming at characteristic of first-section overflowing refined coal products of a three-product heavy-medium cyclone, which comprises the following steps of: separating, removing the medium, recycling the medium, and using the refined-coal magnetic separator tailings for the flotation water-spraying foam removal. Therefore, the method is suitable for the characteristic of the refined-coal magnetic separator tailings of the first-section overflowing refined coal products of the three-product heavy-medium cyclone, and is particularly suitable for the technical reform of the refined-coal magnetic separator tailings in a coal preparation plant in which the content of fine granular materials (-0.5mm) is high.
Description
Technical field
The present invention relates to a kind of coal preparation technique method, relate to a kind of cleaned coal magnetic tail specifically as flotation water spray debubbling method.
Background technology
China is maximum in the world coal production state and country of consumption; The coal reserves is 9915.60 hundred million t; In the primary energy production and consumption constitutes, account for 70%, wherein 84% coal directly burns as thermal coal, and this is that main energy resource structure can not change in quite over a long time from now on the coal.As maximum in the world developing country, China's sustained and rapid development of economy over nearly 20 years increases sharply to demands for energy and consumption, and is also more and more outstanding by the caused environmental problem of coal utilization.The progressively raising of Environmental Protection in China rules and standard thereof, following Energy Mix will tilt to clean energy resourcies such as natural gas, water power, nuclear energy lentamente, but in foreseeable future, turning variation can not take place in the ratio of coal in China's energy-consuming constitutes.China is a large amount of to produce and consumes coal and the environmental problem that caused, causes the Chinese government and the people's the great attention and the concern of surrounding countries.In order effectively to utilize coal resources, to reduce coal-fired pollution to environment, guarantee the healthy sustainable development of national economy, must carry out clean coal technology.Clean coal technology is is the source with the coal washing, turn to the guide, be the technical system of core with coal clean combustion and generating with coal conversion.The coal washing technology is the most ripe, the most reliable in the clean coal technology, and investment and operating cost are minimum.Can remove the spoil in the raw coal through coal washing, reduce sulphur content and ash content in the coal, improve the quality and the kind that increases the coal commodity of coal, create conditions for effectively utilizing coal, minimizing pollution that caused by coal burning.
Flotation obtains general application as the method for Bed for Fine Coal sorting in coal preparation plant, is mainly used in the Bed for Fine Coal below the sorting 0.5mm.
Magnetic separator mine tailing (hereinafter to be referred as magnetic tail) is meant the last black water after magnetic iron ore is reclaimed in the magnetic separator magnetic separation in coal preparation plant; Cleaned coal magnetic separator mine tailing (hereinafter to be referred as the cleaned coal magnetic tail) then is meant for the screenings of selected cleaned coal behind sculping screen that heavily be situated between, and is sent to magnetic separator and reclaims magnetic iron ore black water afterwards.
Coal separation one factory of Shanxi sunlight coking Group Co.,Ltd then is to make it be sent to cleaned coal magnetic tail bucket earlier for the cleaned coal magnetic tail; With pump cleaned coal magnetic tail bucket is driven in the classifying cyclone then; The overflow of cyclone is sent to flotation device flotation once more, and concrete process chart is as shown in Figure 1.
The a application number of announcing in 2007 is in the application for a patent for invention " two stage dewatering technology of fine coal mud " of 200610102141.X; For the cleaned coal magnetic tail then is to sieve through vibration sieve bend earlier; Screenings is sent to flotation device and selects; Oversize is sent to screen-bowl centrifuge and further handles, and process chart is as shown in Figure 2.
Its coal preparation technique that adopts is: 200～40mm adopted the dense-medium shallow-tank branch to Wang Zhuan ore deposit coal preparation plant of the Lushui River peace group by the reorganization and expansion completion of Tai Gete group in 2009; 40～1.0mm adopts two section two product dual medium cyclone dressing; 1.0～0.25mm coarse slime adopts the sorting of TSS slime separation machine; 0.25～0 mm fine coal slurry adopts the flotation device sorting.Wherein the cleaned coal magnetic tail of dense-medium shallow-tank separator has been used as the water spray of raw coal sizing screen (40mm sieve aperture), and the cleaned coal magnetic tail of heavy medium cyclone has been used as the water spray of last raw coal desliming screen (1mm sieve aperture).
In the above-described cleaned coal magnetic tail treatment process, Shanxi Co., Ltd of sunlight coking group adopts classifying cyclone that the cleaned coal magnetic tail has been carried out classification, and the flotation device that is sent to that granularity is little carries out floatation recovery Bed for Fine Coal wherein; Number of patent application be in the patent of invention of 200610102141.X for the cleaned coal magnetic tail, it is sent in the vibration sieve bend, screenings is sent to flotation device and carries out floatation recovery; What the Lushui River was pacified coal washery, group Wang Zhuan ore deposit then is the water spray that directly the cleaned coal magnetic tail is used as sieve, has replaced the effect of recirculated water.
At the cleaned coal magnetic tail treatment process that is generally used, have following characteristics: 1. the cleaned coal magnetic tail is sent to earlier in the cleaned coal magnetic tail bucket at present, and a big cleaned coal magnetic tail Stall that bucket is positioned at has taken bigger space, and the capital expenditure cost is also very big; 2. with the cleaned coal magnetic tail through after the grading plant, fine-gradedly send into flotation and select system to carry out sorting, increased the load of flotation device; 3. the froth breaking water spray of flotation device use needs to use recirculated water, has further increased the load of follow-up black water dewatering process.
Summary of the invention
A kind of cleaned coal magnetic tail that improves cleaned coal magnetic tail utilization ratio, reduces flotation device power consumption and reduction capital expenditure cost that the object of the invention provides to existing weak point in the above-mentioned prior art just is as the flotation debubbling method.
Method proposed by the invention can reduce the investment of system and the capital expenditure of factory building, has improved the reliability of floatation system, reduces system consumption power, streamlining management and maintenance work.
The present invention is directed to the characteristics of one section overflow head coal product of three products heavy medium cyclone; A kind of cleaned coal magnetic tail has been proposed as flotation froth breaking water spray means; Promptly traditional cleaned coal magnetic tail treatment process is improved; Make the characteristics of cleaned coal magnetic tail of one section overflow head coal product of its suitable three products heavy medium cyclone, (0.5mm) the extra high coal preparation plant of content is to the technological transformation of its cleaned coal magnetic tail particularly to be fit to fine.
The object of the invention can be realized through following technique measures:
Processing step of the present invention is following:
A. lump coal raw material ⑴ is sent into and carry out sorting in the three products heavy medium cyclone, obtain cleaned coal ⑵, middle coal ⑶ and spoil ⑷ respectively, after the middle coal ⑶ that obtains and spoil ⑷ process de-mediated and dehydration link, coal bunker and waste bin in sending into respectively;
B. will send into the arc sculping screen from the cleaned coal ⑵ among the step a and carry out a de-mediated, screenings is sent into qualified medium bucket ⑹ as qualified medium; Oversize ⑸ sends into the straight-line oscillation sculping screen and carries out the secondary de-mediated, and the preceding 1/3 section screenings of linear vibrating screen is sent into qualified medium bucket ⑹ as qualified medium; The screenings that is provided with behind the linear vibrating screen of water injector 2/3 section is sent into magnetic separator (owing to added water spray back 2/3 section of linear vibrating screen as rare medium ⑻; Qualified medium is diluted; Obtained rare medium; The operation that this step adds water belongs to the routine operation of de-mediated system), oversize piece cleaned coal ⑺ sends into the cleaned coal storehouse after through the centrifugal dehydrator dehydration;
C. to being sent to magnetic separator from the rare medium ⑻ among the step b through after the magnetic separation, the concentrate that magnetic separation obtains is sent to current divider box and shunts (routine operation that the current divider box triage operator belongs to the magnetic separation system), reduces fine slime content wherein; The cleaned coal magnetic tail ⑼ that magnetic separation obtains is sent to floatation system;
D. the Bed for Fine Coal pan feeding ⑽ of general-0.5mm is sent to and carries out flotation in the flotation device, will carry out froth breaking with the form of water spray from the water spray of the cleaned coal magnetic tail ⑼ among the step c as flotation device, and preventing influences follow-up operation because of cleaned coal is mingled with a large amount of foams; Cleaned coal ⑾ that flotation obtains is sent to the cleaned coal storehouse through processed, tail coal ⑿ through concentrating-press filtration (this step concentrate-press filtration belong to the routine operation that floating tail-coal is handled) becomes coal slime and is sent to the tail coal storehouse.
In above-mentioned processing step was described, processing steps such as the moisturizing of not describing, de-mediated, interpolation magnetic iron ore and interpolation clear water all were the routine techniques of this system, repeat no more at this.
Useful result of the present invention is following:
1. the present invention utilizes the grading of three products heavy medium cyclone to the overflow product, no longer needs the follow-up grading to the cleaned coal magnetic tail.
2. the present invention directly sprays water the cleaned coal magnetic tail as the flotation froth breaking; The cleaned coal magnetic tail is owing to passed through the sorting of three products heavy medium cyclone; Guaranteed that fine-graded coal is qualified head coal product in the cleaned coal magnetic tail, finally passing through dehydration through the overflow of flotation device becomes cleaned coal.
The present invention utilize magnetic separator to rare section magnetic iron ore that is situated between up to 99.999% the rate of recovery, guaranteed in the cleaned coal magnetic tail, to exist the magnetite powder of minute quantity; When this cleaned coal magnetic tail is used as the froth breaking water of agitation impeller flotator; Because the density of magnetic iron ore is big than Bed for Fine Coal density; These a spot of magnetite powders can become the underflow of flotation device, and can not be sent to the pollution load of overflow floatation clean coal product of flotation device, have guaranteed the quality of floatation clean coal.
4. the present invention has played cleaning action through flotation device froth breaking water spray, has reduced carrying secretly of thin mud, has lowered the ash content of head coal product.
5. the present invention has reduced cleaned coal magnetic tail tube and follow-up cleaned coal magnetic tail graded operation, has reduced capital expenditure, is beneficial to maintenance.
6. the present invention replaces recirculated water as flotation device froth breaking water spray the cleaned coal magnetic tail, has reduced the load of follow-up black water processing operation.
Description of drawings
Fig. 1 is the processing mode process chart of the cleaned coal magnetic tail of Shanxi sunlight coking coal separation one factory.
Fig. 2 is that application number is the treating method process chart of the disclosed cleaned coal magnetic tail of 200610102141.X.
Fig. 3 is an a whole set of process chart of the present invention.
Fig. 4 is that the cleaned coal magnetic tail that technology of the present invention relates to is used as the process chart that the flotation froth breaking is sprayed water.
The specific embodiment
To combine embodiment (accompanying drawing 4) that the present invention is done further detailed description below the present invention.
As shown in Figure 4; Cleaned coal magnetic tail of the present invention is that the characteristics that are directed against one section overflow head coal product of three products heavy medium cyclone have proposed a kind of improving one's methods as flotation water spray debubbling method; Be sorting-de-mediated-medium recovery-cleaned coal magnetic tail as flotation froth breaking water spray link (referring to Fig. 4); Make the characteristics of cleaned coal magnetic tail of one section overflow head coal product of its suitable three products heavy medium cyclone, (0.5mm) the extra high coal preparation plant of content is to the technological transformation of its cleaned coal magnetic tail particularly to be fit to fine.
Technology of the present invention is undertaken by following step:
A. lump coal pan feeding ⑴ is sent to and carries out sorting in the three products heavy medium cyclone, obtains cleaned coal ⑵, middle coal ⑶ and spoil ⑷ respectively, after the middle coal ⑶ that obtains and spoil ⑷ process de-mediated and dehydration link, and coal bunker and waste bin in being sent to respectively;
B. carry out a de-mediated to being sent to the arc sculping screen from the cleaned coal ⑵ among the step a, screenings is sent to qualified medium bucket ⑹ as qualified medium; Oversize ⑸ is sent to the straight-line oscillation sculping screen and carries out the secondary de-mediated, and the preceding 1/3 section screenings of linear vibrating screen is sent to qualified medium bucket ⑹ as qualified medium; Behind the linear vibrating screen 2/3 section screenings as rare medium ⑻ (owing to added water spray back 2/3 section of linear vibrating screen; Qualified medium is diluted; Obtained rare medium; The operation that this step adds water belongs to the routine operation of de-mediated system) be sent to magnetic separator, oversize piece cleaned coal ⑺ sends into the cleaned coal storehouse after through the centrifugal dehydrator dehydration;
C. to being sent to magnetic separator from the rare medium ⑻ among the step b through after the magnetic separation, the concentrate that magnetic separation obtains is sent to current divider box and shunts, and reduces fine slime content (the current divider box triage operator belongs to the routine operation of magnetic separation system) wherein; The mine tailing that magnetic separation obtains (cleaned coal magnetic tail ⑼) is sent to floatation system;
D. the Bed for Fine Coal pan feeding ⑽ of general-0.5mm is sent to and carries out flotation in the flotation device, will carry out froth breaking with the form of water spray from the water spray of the cleaned coal magnetic tail ⑼ among the step c as flotation device, and preventing influences follow-up operation because of cleaned coal is mingled with a large amount of foams; Cleaned coal ⑾ that flotation obtains is sent to the cleaned coal storehouse through processed, tail coal ⑿ through concentrating-press filtration (this step concentrate-press filtration belong to the routine operation that floating tail-coal is handled) becomes coal slime and is sent to the tail coal storehouse.
In above-mentioned processing step was described, processing steps such as the moisturizing of not describing, de-mediated, interpolation magnetic iron ore and interpolation clear water all were the routine techniques of this system, repeat no more at this.
Claims (1)
1. a cleaned coal magnetic tail is as flotation water spray debubbling method, and it is characterized in that: the processing step of said method is following:
A. lump coal raw material ⑴ is sent into and carry out sorting in the three products heavy medium cyclone, obtain cleaned coal ⑵, middle coal ⑶ and spoil ⑷ respectively, after the middle coal ⑶ that obtains and spoil ⑷ process de-mediated and dehydration link, coal bunker and waste bin in sending into respectively;
B. will send into the arc sculping screen from the cleaned coal ⑵ among the step a and carry out a de-mediated, screenings is sent into qualified medium bucket ⑹ as qualified medium; Oversize ⑸ sends into the straight-line oscillation sculping screen and carries out the secondary de-mediated, and the preceding 1/3 section screenings of linear vibrating screen is sent into qualified medium bucket ⑹ as qualified medium; The screenings that is provided with behind the linear vibrating screen of water injector 2/3 section is sent into magnetic separator as rare medium ⑻, and oversize piece cleaned coal ⑺ sends into the cleaned coal storehouse after through the centrifugal dehydrator dehydration;
C. to being sent to magnetic separator from the rare medium ⑻ among the step b through after the magnetic separation, the concentrate that magnetic separation obtains is sent to current divider box and shunts, and reduces fine slime content wherein; The cleaned coal magnetic tail ⑼ that magnetic separation obtains is sent to floatation system;
D. the Bed for Fine Coal pan feeding ⑽ of general-0.5mm is sent to and carries out flotation in the flotation device, will carry out froth breaking with the form of water spray from the water spray of the cleaned coal magnetic tail ⑼ among the step c as flotation device, and preventing influences follow-up operation because of cleaned coal is mingled with a large amount of foams; The cleaned coal ⑾ that flotation obtains is sent to the cleaned coal storehouse through processed, and tail coal ⑿ becomes coal slime and is sent to the tail coal storehouse through concentrated-press filtration.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201210336787 CN102824955B (en) | 2012-09-13 | 2012-09-13 | Method for using refined coal magnetic separator tailings for flotation water-spraying foam removal |
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| CN 201210336787 CN102824955B (en) | 2012-09-13 | 2012-09-13 | Method for using refined coal magnetic separator tailings for flotation water-spraying foam removal |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105233973A (en) * | 2015-11-02 | 2016-01-13 | 迈安德集团有限公司 | Graded desliming system and process for mica |
| CN105344462A (en) * | 2014-03-10 | 2016-02-24 | 衢州市易凡设计有限公司 | Washing process for high-ash high-mud high-gangue coal |
| CN108097451A (en) * | 2018-01-27 | 2018-06-01 | 华北科技学院 | A kind of coal separation station-service magnetic separation process flow |
| CN109201314A (en) * | 2018-09-11 | 2019-01-15 | 乌拉特中旗毅腾矿业有限责任公司 | A kind of middle coal clean utilization production technology |
| US10994228B2 (en) * | 2019-12-13 | 2021-05-04 | Anhui University of Science and Technology | Reverse flow type multi-stage sedimentation rake-free thickening device |
| US11602704B2 (en) * | 2019-12-13 | 2023-03-14 | Anhui University Of Science & Technology | Rake-free thickening device including driving area |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB666801A (en) * | 1948-08-20 | 1952-02-20 | Stamicarbon | Process for the separation of mixtures of solid materials of different specific gravity and different grain size |
| US4802976A (en) * | 1988-01-04 | 1989-02-07 | Miller Francis G | Method for recovering fine clean coal |
| CN1792830A (en) * | 2005-10-21 | 2006-06-28 | 赵树彦 | Tech. for treating coal mud water by tow section concentration, tow section recovery |
| CN102553703A (en) * | 2012-01-12 | 2012-07-11 | 中国矿业大学 | Coal slime treatment process for deslimed dense-medium coal separation |
-
2012
- 2012-09-13 CN CN 201210336787 patent/CN102824955B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB666801A (en) * | 1948-08-20 | 1952-02-20 | Stamicarbon | Process for the separation of mixtures of solid materials of different specific gravity and different grain size |
| US4802976A (en) * | 1988-01-04 | 1989-02-07 | Miller Francis G | Method for recovering fine clean coal |
| CN1792830A (en) * | 2005-10-21 | 2006-06-28 | 赵树彦 | Tech. for treating coal mud water by tow section concentration, tow section recovery |
| CN102553703A (en) * | 2012-01-12 | 2012-07-11 | 中国矿业大学 | Coal slime treatment process for deslimed dense-medium coal separation |
Non-Patent Citations (2)
| Title |
|---|
| 刘燕华等: "TDC磁选机在长治飞达煤业选煤厂的生产实践", 《煤矿机械》 * |
| 胜利矿洗煤厂: "改进工艺流程实现煤泥水闭路循环", 《选煤技术》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105344462A (en) * | 2014-03-10 | 2016-02-24 | 衢州市易凡设计有限公司 | Washing process for high-ash high-mud high-gangue coal |
| CN105233973A (en) * | 2015-11-02 | 2016-01-13 | 迈安德集团有限公司 | Graded desliming system and process for mica |
| CN108097451A (en) * | 2018-01-27 | 2018-06-01 | 华北科技学院 | A kind of coal separation station-service magnetic separation process flow |
| CN109201314A (en) * | 2018-09-11 | 2019-01-15 | 乌拉特中旗毅腾矿业有限责任公司 | A kind of middle coal clean utilization production technology |
| CN109201314B (en) * | 2018-09-11 | 2020-12-01 | 乌拉特中旗毅腾矿业有限责任公司 | Clean utilization production process for middlings |
| US10994228B2 (en) * | 2019-12-13 | 2021-05-04 | Anhui University of Science and Technology | Reverse flow type multi-stage sedimentation rake-free thickening device |
| US11602704B2 (en) * | 2019-12-13 | 2023-03-14 | Anhui University Of Science & Technology | Rake-free thickening device including driving area |
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| CN102824955B (en) | 2013-08-14 |
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