CN102179291A - Steam coal preparation technique with low coal slime yield - Google Patents
Steam coal preparation technique with low coal slime yield Download PDFInfo
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- CN102179291A CN102179291A CN2010106242805A CN201010624280A CN102179291A CN 102179291 A CN102179291 A CN 102179291A CN 2010106242805 A CN2010106242805 A CN 2010106242805A CN 201010624280 A CN201010624280 A CN 201010624280A CN 102179291 A CN102179291 A CN 102179291A
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Abstract
The invention relates to a steam coal preparation technique with low coal slime yield, comprising the following steps of: (1) storing the raw coal of steam coal in a horizontal cabin, wherein the height of coal storage is less than 10 m; (2) crushing the raw coal less than 200 nm by using a grading crusher; (3) feeding the raw coal into a bolting mill for milling after crushing, wherein the coal with big screening size enters a lump coal washing system for washing, the fine coal powder with small size is then sieved, and the fine powder less than 6 nm after sieving directly enters a product cabin; and the remaining slack coal enters a non-pressure dense media swirler for washing and de-liming. The technique can wash all the steam coal with relatively lower cost; the coal slime yield is reduced; and the calorific value of washed steam coal product is increased.
Description
Technical field
The present invention relates to the thermal coal coal preparation technique, more specifically, relate to a kind of low coal slime output thermal coal coal preparation technique.
Background technology
China's thermal coal mainly comprises dross coal, weakly caking coal, jet coal, bottle coal, meager coal, lean coal and brown coal etc.Because the leading indicator of thermal coal is a caloric value, so moisture in coal, content of ashes are all had strict demand; Otherwise the coal product calorific value descends significantly, and its utilization ratio reduces significantly.Along with deeply carrying out of energy-saving and emission-reduction, to the progressively raising of washing requirement of thermal coal product, thermal coal goes into to wash rate progressively to be increased.But in the thermal coal washing, when reducing content of ashes, produce a large amount of coal slimes, make washing after coal product moisture increase, it is limited to cause after the washing thermal coal calorific value to improve, even produces the phenomenon of washing not as not washing.
Summary of the invention
The coal preparation technique that the purpose of this invention is to provide a kind of low coal slime output reduces coal slime output significantly, the calorific value of thermal coal product after the raising washing.
Low coal slime output thermal coal coal preparation technique concrete steps of the present invention are as follows:
(1) will be stored in the horizontal bin from the thermal coal raw coal that mine ships, the coal storing highly is less than 10 meters; Described horizontal bin can be circular coal bunker.
(2) use Sizing Crusher that raw coal is crushed to below the 200mm;
(3) deliver to screening machine after the raw coal fragmentation and sieve, the following 13mm that is limited to of screen size wherein can be 25mm or 50mm:
Enter lump coal washing system greater than the coal of screen size and carry out washing;
Carry out the fine powder screening again less than the coal of screen size, sift out less than 6mm, preferably the fine powder less than 3mm directly enters the product storehouse; Remaining smalls enters no ballast Jie cyclone and carries out the washing deliming.
Preferably, smalls is divided into cleaned coal, middle coal and spoil after the washing of no ballast Jie cyclone, and cleaned coal, middle coal enter the product storehouse, and spoil enters waste bin.
Preferably, lump coal washing system can be a wet method washing system, as jigging washing, shallow slot heavily be situated between, heavily be situated between eddy flow or flotation.
Preferably, the no ballast Jie cyclone among the present invention is do not have to press heavily be situated between cyclone or do not have two products of the pressure cyclone that heavily is situated between of three products.
Preferably, the coal that enters lump coal washing system after the screening accounts for the 30-60% of coal total amount.
Preferably, the thermal coal among the present invention is dross coal, weakly caking coal, jet coal, bottle coal, meager coal, lean coal or brown coal.
The percentage that uses among the application (%) all is weight percentage.
In the coal preparation technique of the present invention,, reduced the coal storing highly, reduced the wearing and tearing of coal, thereby reduced the generation of coal dust, slime content is reduced owing to adopt horizontal bin; The broken Sizing Crusher that adopts of raw coal, the fine breeze that this crusher in crushing raw coal produces is few; Before smalls enters water, sieve, can sift out the parts of fine coal dust, thereby reduce the generation of coal slime; Washing process adopts no ballast Jie cyclone, because charging does not have pressure, has reduced the wearing and tearing of coal, thereby has reduced the generation of coal slime.
Coal preparation technique of the present invention has the following advantages:
1, under low processing cost, realized that the whole of thermal coal go into to wash, and have improved the ability of regulation and control of dressing of coal by washing system to commodity thermal coal quality;
2 go into to wash technology entirely with conventional wet compares, because each process procedure of coal separation of the present invention system is all taken measures, reduce the generation of fine coal, or reduce the quantity that fine breeze enters the washing system, therefore coal separation of the present invention system produces slime content goes into to wash technology entirely than traditional coal and lacks 2-10%, has reduced the marketable coal moisture; The marketable coal calorific value is improved, and the coal calorific value of washing processing through lump coal washing system choosing improves 400-1200kcal/kg, the coal calorific value raising 200-800kcal/kg that handles through the washing of no ballast Jie eddy flow system; Through after this PROCESS FOR TREATMENT, mix the marketable coal calorific value and improve more than the 200-800kcal/kg;
3 compare with dry method selection by winnowing technology, have washing precision height, characteristics such as ash content removal efficiency height;
4, this technology is flexible, and wide adaptability can be used for various thermal coal washings.
The specific embodiment
In conjunction with the specific embodiment the present invention is described, but the invention is not restricted to the content of following examples.
Embodiment 1
With content of ashes be 25%, moisture is that 30% jet coal is stored in the circular storehouse, the coal storing highly is 9 meters.With belt jet coal is delivered to the Sizing Crusher that Britain MMD mining machinery Development Co., Ltd produces, jet coal is crushed to below the 200mm, sieve processing then, screen size is 25mm.Granularity enters the jigging washing appliance that U.S. Sai Ji Man produces greater than the lump coal of 25mm and carries out washing, and after the lump coal washing, ash content is reduced to 16% from 25%.Granularity is carried out the fine powder screening less than the coal of 25mm, and the fine powder screen size is 3mm; Fine powder less than 3mm directly enters the product storehouse, and all the other smalls enter nothing that Tangshan state China company produces and press the three products cyclone system that heavily is situated between to carry out the washing deliming, are divided into cleaned coal, middle coal and spoil, and cleaned coal, middle coal enter the product storehouse, and spoil enters waste bin; Granularity is reduced to 13% less than the pit ash of 25mm from 25%, mixes the marketable coal calorific value and improves 420kcal/kg, and coal slime output 8% is compared coal slime and reduced by 6% with traditional washing process.
Embodiment 2
With content of ashes be 28%, moisture is that 20% dross coal is stored in the circular storehouse, the coal storing highly is less than 10 meters.With belt dross coal is delivered to the Sizing Crusher that Britain MMD mining machinery Development Co., Ltd produces, dross coal is crushed to below the 200mm, sieve processing then, screen size is 13mm.Granularity enters the jigging washing appliance that U.S. Sai Ji Man produces greater than the lump coal of 13mm and carries out washing, and after the lump coal washing, ash content is reduced to 16% from 28%.Granularity is carried out the fine powder screening less than the coal of 13mm, and the fine powder screen size is 6mm; Fine powder less than 6mm directly enters the product storehouse, and all the other smalls enter nothing that Tangshan state China company produces and press the three products cyclone system that heavily is situated between to carry out the washing deliming, are divided into cleaned coal, middle coal and spoil, and cleaned coal, middle coal enter the product storehouse, and spoil enters waste bin; Granularity is reduced to 10% less than the pit ash of 13mm from 28%, mixes the marketable coal calorific value and improves 520kcal/kg, and coal slime output 6% is compared coal slime and reduced by 4% with traditional washing process.
Embodiment 3
With content of ashes be 20%, moisture is that 22% weakly caking coal is stored in the circular storehouse, the coal storing highly is 9 meters.With belt weakly caking coal is delivered to the Sizing Crusher that Britain MMD mining machinery Development Co., Ltd produces, weakly caking coal is crushed to below the 200mm, sieve processing then, screen size is 50mm.Granularity enters the jigging washing appliance that U.S. Sai Ji Man produces greater than the lump coal of 50mm and carries out the wet method washing, and after the lump coal washing, ash content is reduced to 13% from 20%.Granularity is carried out the fine powder screening less than the coal of 50mm, and the fine powder screen size is 6mm; Fine powder less than 6mm directly enters the product storehouse, and all the other smalls enter nothing that Tangshan state China company produces and press the three products cyclone system that heavily is situated between to carry out the washing deliming, are divided into cleaned coal, middle coal and spoil, and cleaned coal, middle coal enter the product storehouse, and spoil enters waste bin; Granularity is reduced to 8% less than the pit ash of 6mm from 20%, mixes the marketable coal calorific value and improves 620kcal/kg, and coal slime output 7% is compared coal slime and reduced by 9% with traditional washing process.
Embodiment 4
With content of ashes be 22%, moisture is that 12% anthracite is stored in the circular storehouse, the coal storing highly is less than 10 meters.With belt anthracite is delivered to the Sizing Crusher that Britain MMD mining machinery Development Co., Ltd produces, anthracite is crushed to below the 200mm, sieve processing then, screen size is 50mm.Granularity enters the jigging washing appliance that U.S. Sai Ji Man produces greater than the lump coal of 50mm and carries out the wet method washing, and after the lump coal washing, ash content is reduced to 12% from 22%.Granularity is carried out the fine powder screening less than the coal of 50mm, and the fine powder screen size is 6mm; Fine powder less than 6mm directly enters the product storehouse, and all the other smalls enter nothing that Tangshan state China company produces and press the three products cyclone system that heavily is situated between to carry out washing, are divided into cleaned coal, middle coal and spoil, and cleaned coal, middle coal enter the product storehouse, and spoil enters waste bin; Granularity is reduced to 10% less than the pit ash of 50mm from 22%, mixes the marketable coal calorific value and improves 620kcal/kg, and coal slime output 5% is compared coal slime and reduced by 5% with traditional washing process.
Claims (10)
1. one kind low coal slime output thermal coal coal preparation technique comprises step:
(1) the thermal coal raw coal is stored in the horizontal bin, the coal storing highly is less than 10 meters;
(2) use Sizing Crusher that raw coal is crushed to below the 200mm;
(3) delivering to screening machine after the raw coal fragmentation sieves:
Enter lump coal washing system greater than the coal of screen size and carry out washing;
Coal less than screen size carries out the fine powder screening again, and the fine powder that sifts out less than 6mm directly enters the product storehouse; Remaining smalls enters no ballast Jie cyclone and carries out the washing deliming.
2. technology according to claim 1 is characterized in that, is limited to 13mm under the described screen size.
3. technology according to claim 2 is characterized in that, described screen size is 25mm or 50mm.
4. technology according to claim 3 is characterized in that, described smalls is divided into cleaned coal, middle coal and spoil after the washing of no ballast Jie cyclone, and cleaned coal, middle coal enter the product storehouse, and spoil enters waste bin.
5. technology according to claim 4 is characterized in that, described no ballast Jie cyclone is do not have to press heavily be situated between cyclone or do not have two products of the pressure cyclone that heavily is situated between of three products.
6. technology according to claim 5 is characterized in that, lump coal washing system is a wet method washing system.
7. technology according to claim 6 is characterized in that, described lump coal washing system is jigging washing, shallow slot heavily be situated between, heavily be situated between eddy flow or flotation.
8. technology according to claim 7 is characterized in that, the coal that enters lump coal washing system after the screening accounts for the 30-60% of coal total amount.
9. technology according to claim 8 is characterized in that, described thermal coal is dross coal, weakly caking coal, jet coal, bottle coal, meager coal, lean coal or brown coal.
10. according to any described technology of claim 1-9, it is characterized in that described horizontal bin is circular coal bunker.
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| CN2010106242805A CN102179291A (en) | 2010-12-31 | 2010-12-31 | Steam coal preparation technique with low coal slime yield |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102773153A (en) * | 2012-07-16 | 2012-11-14 | 中国矿业大学 | Lignite separation process |
| CN103611621A (en) * | 2013-11-20 | 2014-03-05 | 高峰 | Heavy medium continuous coal washing unit and continuous raw coal crushing method |
| CN105327770A (en) * | 2015-11-23 | 2016-02-17 | 淮南矿业(集团)有限责任公司 | Coal dressing treatment method |
| CN106040421A (en) * | 2016-07-18 | 2016-10-26 | 淮南矿业(集团)有限责任公司 | Steam coal quality control method |
| CN109772571A (en) * | 2019-01-24 | 2019-05-21 | 中国矿业大学 | A kind of lump coal enters the coal jigging technique washed |
| CN110075991A (en) * | 2019-04-19 | 2019-08-02 | 神华准格尔能源有限责任公司 | Dry-wet combined sorting system |
| WO2020155422A1 (en) * | 2019-01-31 | 2020-08-06 | 中国矿业大学 | Process for sorting difficult-to-sort thermal coal |
| CN112871440A (en) * | 2021-01-12 | 2021-06-01 | 黑龙江龙煤双鸭山矿业有限责任公司 | Fusion process of coking coal preparation plant and power coal preparation plant |
| CN114042528A (en) * | 2021-11-17 | 2022-02-15 | 六盘水师范学院 | Coal mine washing and selecting treatment system |
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| CN101875025A (en) * | 2010-06-03 | 2010-11-03 | 于海波 | Efficient and high-quality jigging control method of thermal coal |
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| RU2282503C1 (en) * | 2005-11-03 | 2006-08-27 | Александр Владимирович Кузьмин | Method of dry coal conversion |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102773153A (en) * | 2012-07-16 | 2012-11-14 | 中国矿业大学 | Lignite separation process |
| CN102773153B (en) * | 2012-07-16 | 2013-08-21 | 中国矿业大学 | Lignite separation process |
| CN103611621A (en) * | 2013-11-20 | 2014-03-05 | 高峰 | Heavy medium continuous coal washing unit and continuous raw coal crushing method |
| CN103611621B (en) * | 2013-11-20 | 2016-05-25 | 王惠丽 | A kind of continuous wash coaling equipment of dense media and raw coal continuous crushing method |
| CN105327770A (en) * | 2015-11-23 | 2016-02-17 | 淮南矿业(集团)有限责任公司 | Coal dressing treatment method |
| CN106040421A (en) * | 2016-07-18 | 2016-10-26 | 淮南矿业(集团)有限责任公司 | Steam coal quality control method |
| CN109772571A (en) * | 2019-01-24 | 2019-05-21 | 中国矿业大学 | A kind of lump coal enters the coal jigging technique washed |
| WO2020155422A1 (en) * | 2019-01-31 | 2020-08-06 | 中国矿业大学 | Process for sorting difficult-to-sort thermal coal |
| CN110075991A (en) * | 2019-04-19 | 2019-08-02 | 神华准格尔能源有限责任公司 | Dry-wet combined sorting system |
| CN112871440A (en) * | 2021-01-12 | 2021-06-01 | 黑龙江龙煤双鸭山矿业有限责任公司 | Fusion process of coking coal preparation plant and power coal preparation plant |
| CN114042528A (en) * | 2021-11-17 | 2022-02-15 | 六盘水师范学院 | Coal mine washing and selecting treatment system |
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Application publication date: 20110914 |