CN101602029B - Process for selecting cleaned coals from gangue coals of raw coals and middling coals - Google Patents
Process for selecting cleaned coals from gangue coals of raw coals and middling coals Download PDFInfo
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- CN101602029B CN101602029B CN2009100724337A CN200910072433A CN101602029B CN 101602029 B CN101602029 B CN 101602029B CN 2009100724337 A CN2009100724337 A CN 2009100724337A CN 200910072433 A CN200910072433 A CN 200910072433A CN 101602029 B CN101602029 B CN 101602029B
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Abstract
The invention relates to a process for selecting cleaned coals from gangue coals of raw coals and middling coals, which adopts a method of desliming before selection and performing separation in a coal-slime separator after crushing. The process can select the cleaned coals from the gangue coals in the raw coals and the middling coals generated from coking coals after being cleaned, has the advantages of simple process, low coal dressing cost and high efficiency, is free from using flotation reagents, recycles water resources and is free from causing pollution to the environment, and the produced cleaned coals are applied to formcoke coal blending or export sales, and the middling coals and coal slimes are used as raw materials for producing moulded coals and biomass moulded coals.
Description
Technical field
The present invention relates to a kind of coal preparation technique, particularly a kind of locked middlings with raw coal and middle coal carries out choosing after the fragmentation technology of cleaned coal.
Background technology
Rich coal, coking coal, lean coal contained in the coal for coking all are the rare coals of Heilongjiang Province, and coal for coking basically all goes into to wash, and cleaned coal is used for coking; In the coal direct marketing make fuel to power plant, with 2006 be example, Heilongjiang Province's coal for coking is 1,686 ten thousand tons; Wherein have 30% about 5,000,000 tons be used for power plant, contain granularity in these in the coal and be the locked middlings below the 50mm, if it is crushed to below the granularity 5mm; Wherein contain about 30% cleaned coal, issue over a year in 5,000,000 tons of power plant and comprise 1,500,000 tons cleaned coal in the coal, the coal direct marketing has been made fuel to power plant in these 5,000,000 tons; Cause the very big wasting of resources, same, also contain a large amount of locked middlingses in the various raw coal; Directly also can cause the wasting of resources as fuel, the existing cleaned coal technology of selecting is owing to the coal separation cost is high, and efficient is low; Contaminated environment can't extensively be implemented, and does not also have at present to clean in the locked middlings of therefrom coal and raw coal the moulding process of cleaned coal.
Summary of the invention
The purpose of this invention is to provide the technology of selecting cleaned coal in a kind of coal separation cost is low, efficient is high, free from environmental pollution therefrom coal and the locked middlings in the raw coal.
Technical solution of the present invention is: desliming before the choosing of this process using, broken back get into the method that the slime separation machine carries out sorting, specifically may further comprise the steps:
A, the lump coal that utilizes raw coal sizing screen to sift out in raw coal or the middle coal land, and the material under the sieve gets into disintegrating machine one and carries out fragmentation, and the material after the fragmentation gets into the desliming classifying screen;
B, the material after utilizing the desliming classifying screen to disintegrating machine one fragmentation carry out desliming and screening, the oversize lump coal of desliming classifying screen get into behind the disintegrating machine sledging with desliming classifying screen sieve under material together get into cyclone;
C, material get into thickener in the effect underflow stream of cyclone, and underflow gets into the slime separation machine;
D, utilize circulating water pool to the slime separation machine process water to be provided, the mixture of material and water is through the sorting of slime separation machine, and overflow gets into vibration sieve bend one, and underflow gets into vibration sieve bend two;
The material of e, entering vibration sieve bend one is through vibration sieve bend one screening, and screenings gets into thickener, and oversize becomes cleaned coal after getting into the centrifuge centrifugal dehydration, and the centrifugate of centrifuge gets into thickener;
The material of f, entering vibration sieve bend two is through vibration sieve bend two screenings, and screenings gets into thickener, and oversize gets into the high frequency sieve;
The material of g, entering high frequency sieve is through the screening of high frequency sieve, and screenings gets into thickener, and oversize forms middle coal slime;
The material of h, entering thickener concentrates the underflow entering filter press dehydration that forms and produces middle coal slime in thickener, the overflow of thickener and the filtrating of filter press entering circulating water pool provide process water for the slime separation machine.
Technique effect of the present invention is: it can go into to wash the back produces and chooses cleaned coal in the locked middlings in the coal from raw coal and coal for coking, and it is simple to have technology, and the coal separation cost is low; The advantage that efficient is high; It is without floating agent, and the water source reusable edible does not pollute the environment; The cleaned coal of producing is used for formed coke coal blending or export trade, and middle coal, coal slime are used to produce the raw material of moulded coal and biomass coal.
Description of drawings
Fig. 1 is an embodiment of the invention process chart.
The specific embodiment
As shown in Figure 1, raw coal or middle coal receive coalpit in the raw coal goods yard through raw coal, by oscillating feeder; Getting into sieve aperture through raw coal belt conveyer one is that the raw coal sizing screen of 50～80mm sifts out lump coal and lands, and screenings is sent into the desliming classifying screen that sieve aperture is 1～3mm via disintegrating machine one broken back through raw coal belt conveyer two, and the oversize lump coal of desliming classifying screen gets into to be squeezed into the cyclone overflow with screenings through the pan feeding pump behind the disintegrating machine sledging and get into thickener; Underflow gets into the slime separation machine, and the separator overflow gets into vibration sieve bend one, and screenings gets into thickener; Oversize gets into centrifuge, is final head coal product after the centrifugal dehydration, and centrifugate gets into thickener; The underflow of slime separation machine gets into vibration sieve bend two; The screenings of vibration sieve bend two gets into thickener, and oversize gets into the high frequency sieve, and high frequency sieve screenings gets into thickener; High frequency sieve oversize is middle coal slime; Thickener underflow is squeezed into filter press dehydration by pump, and filter press is produced in coal slime and the high frequency sieve coal slime and converged and be coal slime in the final products, filter press filtrating and thickener overflow entering circulating water pool; The water of circulating water pool is supplied with the slime separation machine and is made the technology water, when the water shortage in the circulating water pool, can be that circulating water pool replenishes the water source through clear water reserviors.
This process using is carried out sorting from the screening installation TBS slime separation machine that Australia introduces, and its technology is simple, and energy consumption is low, without medium, medicament, can not produce water wasting, has both saved the energy, and is free from environmental pollution again, is a kind of coal preparation technique of energy-conserving and environment-protective.
Claims (8)
- From raw coal and select the technology of cleaned coal in the locked middlings of coal, desliming before the choosing of this process using, broken back get into the method that the slime separation machine carries out sorting, specifically may further comprise the steps:A, the lump coal that utilizes raw coal sizing screen to sift out in raw coal or the middle coal land, and the material under the sieve gets into disintegrating machine one and carries out fragmentation, and the material after the fragmentation gets into the desliming classifying screen;B, the material after utilizing the desliming classifying screen to disintegrating machine one fragmentation carry out desliming and screening, the oversize lump coal of desliming classifying screen get into behind the disintegrating machine sledging with desliming classifying screen sieve under material together get into cyclone;C, material get into thickener in the effect underflow stream of cyclone, and underflow gets into the slime separation machine;D, utilize circulating water pool to the slime separation machine process water to be provided, the mixture of material and water is through the sorting of slime separation machine, and overflow gets into vibration sieve bend one, and underflow gets into vibration sieve bend two;The material of e, entering vibration sieve bend one is through vibration sieve bend one screening, and screenings gets into thickener, and oversize becomes cleaned coal after getting into the centrifuge centrifugal dehydration, and the centrifugate of centrifuge gets into thickener;The material of f, entering vibration sieve bend two is through vibration sieve bend two screenings, and screenings gets into thickener, and oversize gets into the high frequency sieve;The material of g, entering high frequency sieve is through the screening of high frequency sieve, and screenings gets into thickener, and oversize forms middle coal slime;The material of h, entering thickener concentrates the underflow entering filter press dehydration that forms and produces middle coal slime in thickener, the overflow of thickener and the filtrating of filter press entering circulating water pool provide process water for the slime separation machine.
- 2. as claimed in claim 1 from raw coal and select the technology of cleaned coal in the locked middlings of coal, the sieve aperture that it is characterized in that raw coal sizing screen is 50～80mm.
- 3. as claimed in claim 1 from raw coal and select the technology of cleaned coal in the locked middlings of coal, the sieve aperture that it is characterized in that the desliming classifying screen is 1～3mm.
- 4. as claimed in claim 1 from raw coal and select the technology of cleaned coal in the locked middlings of coal, it is characterized in that raw coal or middle coal receive coalpit in the raw coal goods yard through raw coal, by oscillating feeder, get into raw coal sizing screen through raw coal belt conveyer one again.
- 5. as claimed in claim 1 from raw coal and select the technology of cleaned coal in the locked middlings of coal, it is characterized in that the screenings of raw coal sizing screen is sent into the desliming classifying screen via disintegrating machine one broken back through raw coal belt conveyer two.
- 6. as claimed in claim 1 from raw coal and select the technology of cleaned coal in the locked middlings of coal, squeeze into cyclone with screenings through the pan feeding pump after the oversize lump coal that it is characterized in that the desliming classifying screen gets into the disintegrating machine sledging.
- 7. as claimed in claim 1 from raw coal and select the technology of cleaned coal in the locked middlings of coal, it is characterized in that thickener underflow squeezes into filter press by pump.
- 8. as claimed in claim 1 from raw coal and select the technology of cleaned coal in the locked middlings of coal, it is characterized in that when the water shortage in the circulating water pool being that circulating water pool replenishes process water through clear water reserviors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100724337A CN101602029B (en) | 2009-06-27 | 2009-06-27 | Process for selecting cleaned coals from gangue coals of raw coals and middling coals |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100724337A CN101602029B (en) | 2009-06-27 | 2009-06-27 | Process for selecting cleaned coals from gangue coals of raw coals and middling coals |
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| Publication Number | Publication Date |
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| CN101602029A CN101602029A (en) | 2009-12-16 |
| CN101602029B true CN101602029B (en) | 2012-07-25 |
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| CN2009100724337A Expired - Fee Related CN101602029B (en) | 2009-06-27 | 2009-06-27 | Process for selecting cleaned coals from gangue coals of raw coals and middling coals |
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Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101797532A (en) * | 2010-04-07 | 2010-08-11 | 黑龙江科技学院 | Coal separating process of crude coal slime hydroseparation |
| CN102059174B (en) * | 2010-12-19 | 2016-01-20 | 烟台金华选煤工程有限公司 | A kind of cleaned coal dehydration and realize this technique equipment combination |
| CN102179288A (en) * | 2010-12-21 | 2011-09-14 | 王万明 | Coal-reselecting process for heavy media coal separation |
| 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 |
| CN102500466B (en) * | 2011-12-28 | 2013-04-17 | 高华 | Technique for recycling cleaned coal from low-value gangue or tail coal of coal washery |
| CN102627977A (en) * | 2012-03-30 | 2012-08-08 | 中国矿业大学(北京) | Method for expanding coking coal resources |
| CN103721840B (en) * | 2013-12-16 | 2016-01-20 | 李兴海 | In one, the coal fragmentation TBS master that dissociates selects technique again |
| 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 |
| CN104722389B (en) * | 2015-03-02 | 2018-10-30 | 中国矿业大学 | Coal dissociation-is independently sized mixing-bulk flotation technique in a kind of particulate |
| CN104815748B (en) * | 2015-04-26 | 2017-06-20 | 中国矿业大学 | The broken mill floatation process of two sections of coal in a kind of coking |
| CN105126991A (en) * | 2015-07-23 | 2015-12-09 | 金易通科技(北京)股份有限公司 | Main washing technology of coal |
| CN104984819B (en) * | 2015-07-31 | 2017-12-19 | 金易通科技(北京)股份有限公司 | A kind of oil shale end ore deposit ore-dressing technique |
| CN105964392B (en) * | 2016-06-20 | 2019-01-25 | 中国神华能源股份有限公司 | A kind of coal separation desliming system |
| CN108117879A (en) * | 2016-11-28 | 2018-06-05 | 宝山钢铁股份有限公司 | The blending method that a kind of part moisture-control grading crushes |
| CN110756315B (en) * | 2019-09-24 | 2021-10-15 | 杭州龙山化工有限公司 | Lump coal washing method of coal washing system |
| WO2021253304A1 (en) * | 2020-06-18 | 2021-12-23 | Zhongyang Mingyuan Coal Preparation Plant | Clean coal production system and method |
| CN114700169A (en) * | 2022-01-17 | 2022-07-05 | 淮北矿业股份有限公司 | Separation process suitable for treating fine-grain hard-dressing coking coal with high middling coal content |
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| CN1034147A (en) * | 1987-10-06 | 1989-07-26 | 霍尔代克斯·瓦莱拉塔 | The method of in the two-stage hydraulic rotary separation unit, coal and gangue effectively being separated |
| CN1883812A (en) * | 2006-07-08 | 2006-12-27 | 枣庄矿业(集团)有限责任公司 | Raw coal sorting process |
| 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 |
| CN101455992A (en) * | 2008-12-10 | 2009-06-17 | 重庆南桐矿业有限责任公司南桐选煤厂 | Power coal and sulfur concentrate sorting method and special device thereof |
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2009
- 2009-06-27 CN CN2009100724337A patent/CN101602029B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1034147A (en) * | 1987-10-06 | 1989-07-26 | 霍尔代克斯·瓦莱拉塔 | The method of in the two-stage hydraulic rotary separation unit, coal and gangue effectively being separated |
| CN1883812A (en) * | 2006-07-08 | 2006-12-27 | 枣庄矿业(集团)有限责任公司 | Raw coal sorting process |
| 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 |
| CN101455992A (en) * | 2008-12-10 | 2009-06-17 | 重庆南桐矿业有限责任公司南桐选煤厂 | Power coal and sulfur concentrate sorting method and special device thereof |
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| CN101602029A (en) | 2009-12-16 |
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