CN102205265A - Method for reclaiming clean coal from slurry of coal with poor flotability - Google Patents
Method for reclaiming clean coal from slurry of coal with poor flotability Download PDFInfo
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- CN102205265A CN102205265A CN2010106206442A CN201010620644A CN102205265A CN 102205265 A CN102205265 A CN 102205265A CN 2010106206442 A CN2010106206442 A CN 2010106206442A CN 201010620644 A CN201010620644 A CN 201010620644A CN 102205265 A CN102205265 A CN 102205265A
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Abstract
The invention relates to a method for reclaiming clean coal from slurry of coal with poor flotability, and belongs to a process for reclaiming clean coal from slurry of coal with poor flotability. The method mainly solves the technical problem of serious waste of coal resources because the conventional flotation process cannot reclaim the clean coal from the slurry of the coal with poor flotability. The invention adopts the technical scheme that the method for reclaiming the clean coal from the slurry of the coal with poor flotability comprises the following steps of: preparing less than 150g/L coal slurry solution from the slurry of the coal with poor flotability in a mixing pool, pumping the solution into a mixing tank of a sinking and floating machine by using a pump, and making the solution directly flow into the sinking and floating machine from the mixing tank, making the material overflowing from the sinking and floating machine flow into a high-frequency linear vibrating screen, performing dehydration, obtaining qualified clean coal on the screen, and directly conveying the clean coal to a coal storage plant by using a belt conveyor; conveying the material below the screen to a concentration pool, performing concentration, conveying the concentrated material to a press filter, and performing press filtration to obtain coal slurry tailings; and reclaiming the clean coal from the underflow material of the sinking and floating machine through a multistage cyclone.
Description
Technical field
The present invention relates to a kind of method that reclaims cleaned coal from the coal slime of floatability extreme difference ature of coal, it belongs to a kind of at the technology that reclaims cleaned coal from the coal slime of floatability extreme difference (oxidized coal).
Background technology
Domestic present coal washing industry all extensively adopts the method for floating slime separation for washing from a large amount of coal slimes goes out cleaned coal, but owing to being not quite similar of coal slime quality, and existing technology and technology exist certain defective, during cleaned coal in flotation floatability extreme difference (oxidized coal) ature of coal coal slime, can't reclaim at all, and a large amount of dischargings of solids and the severe contamination of environment have been caused, cleaned coal leakage in the coal slime is very serious, thereby caused the significant wastage of coal resources, also directly influenced the economic benefit of coal washing industry simultaneously.
Summary of the invention
The objective of the invention is to solve cleaned coal in the coal slime that existing floatation process can't reclaim floatability extreme difference (oxidized coal) ature of coal, cause the technical barrier of the serious waste of coal resources, provide a kind of that can reclaim cleaned coal in the floatability extreme difference ature of coal coal slime and reclaim the high method that from the coal slime of floatability extreme difference ature of coal, reclaims cleaned coal of cleaned coal rate.
The present invention solves the problems of the technologies described above the technical scheme that adopts to be:
Reclaim the method for cleaned coal from the coal slime of floatability extreme difference ature of coal, it comprises the following steps:
With coal slime furnishing in the batch mixing pond of floatability extreme difference ature of coal is coal slime pan feeding water below 150 grams per liters, with pump it is squeezed into sink-float machine mixer, flows directly into the sink-float machine by mixer; The material that overflows from the sink-float machine flows to high frequency straight line reciprocating sieve and dewaters, and the oversize material is qualified cleaned coal, and cleaned coal is directly sent into belt feeder and deposited the coal works; Undersize material enters concentration basin and concentrates, and enters filter press after concentrating and carries out press filtration, obtains the coal slime mine tailing;
Sink-float machine underflow materials flows into the medium bucket of 1# three-product cyclone device, squeeze in the 1# three-product cyclone device with the cyclone feed pump, 1# three-product cyclone device cleaned coal outlet overflow water enters the dehydration of high frequency straight line reciprocating sieve, obtain the cleaned coal of cleaned coal ash≤10%, the mine tailing that the spoil outlet of 1# three-product cyclone device is discharged enters 9# medium bucket and handles;
The material that the middle coal export of 1# three-product cyclone device is discharged enters and carries out cleaned coal in the next stage 2# medium bucket and reclaim; The 2# medium pump is sent into material in the 2# medium bucket in the 2# three-product cyclone device, 2# three-product cyclone device cleaned coal outlet overflow water enters the dehydration of high frequency straight line reciprocating sieve, obtain the cleaned coal of cleaned coal ash≤10%, the mine tailing that the spoil outlet of 2# three-product cyclone device is discharged enters 9# medium bucket and handles;
The material that the middle coal export of 2# three-product cyclone device is discharged enters and carries out cleaned coal in the next stage 3# medium bucket and reclaim; The 3# medium pump is sent into material in the 3# medium bucket in the 3# three-product cyclone device, 3# three-product cyclone device cleaned coal outlet overflow water enters the dehydration of high frequency straight line reciprocating sieve, obtain the cleaned coal of cleaned coal ash≤10%, the mine tailing that the spoil outlet of 3# three-product cyclone device is discharged enters 9# medium bucket and handles;
The material that the middle coal export of 3# three-product cyclone device is discharged enters and carries out cleaned coal in the next stage 4# medium bucket and reclaim; The 4# medium pump is sent into material in the 4# medium bucket in the 4# three-product cyclone device, 4# three-product cyclone device cleaned coal outlet overflow water enters the dehydration of high frequency straight line reciprocating sieve, obtain the cleaned coal of cleaned coal ash≤10%, the mine tailing that the spoil outlet of 4# three-product cyclone device is discharged enters 5# medium bucket and handles;
The material that the middle coal export of 4# three-product cyclone device is discharged enters and carries out cleaned coal in the next stage 5# medium bucket and reclaim; The 5# medium pump is sent into material in the 5# medium bucket in the 5# three-product cyclone device, 5# three-product cyclone device cleaned coal outlet overflow water enters the dehydration of high frequency straight line reciprocating sieve, obtain the cleaned coal of cleaned coal ash≤10%, the mine tailing that the spoil outlet of 5# three-product cyclone device is discharged enters 6# medium bucket and handles;
The material that the middle coal export of 5# three-product cyclone device is discharged enters and carries out cleaned coal in the next stage 6# medium bucket and reclaim; The 6# medium pump is sent into material in the 6# medium bucket in the 6# three-product cyclone device, 6# three-product cyclone device cleaned coal outlet overflow water enters the dehydration of high frequency straight line reciprocating sieve, obtain the cleaned coal of cleaned coal ash≤10%, the mine tailing that the spoil outlet of 6# three-product cyclone device is discharged enters 7# medium bucket and handles;
The material that the middle coal export of 6# three-product cyclone device is discharged enters and carries out cleaned coal in the next stage 7# medium bucket and reclaim; The 7# medium pump is sent into material in the 7# medium bucket in the 7# three-product cyclone device, 7# three-product cyclone device cleaned coal outlet overflow water enters the dehydration of high frequency straight line reciprocating sieve, obtain the cleaned coal of cleaned coal ash≤10%, the mine tailing that the spoil outlet of 7# three-product cyclone device is discharged enters 8# medium bucket and handles;
The material that the middle coal export of 7# three-product cyclone device is discharged enters and carries out cleaned coal in the next stage 8# medium bucket and reclaim; The 8# medium pump is sent into material in the 8# medium bucket in the 8# three-product cyclone device, 8# three-product cyclone device cleaned coal outlet overflow water enters the dehydration of high frequency straight line reciprocating sieve, obtain the cleaned coal of cleaned coal ash≤10%, the mine tailing that the spoil outlet of 8# three-product cyclone device is discharged enters 9# medium bucket and handles;
The material that the middle coal export of 8# three-product cyclone device is discharged enters the dehydration of high frequency straight line reciprocating sieve, obtain the cleaned coal of cleaned coal ash≤10%, the 9# medium pump is sent into the material in the 9# medium bucket in the three-product cyclone device, 9# three-product cyclone device cleaned coal outlet overflow water enters mixer, middle coal export material enters 1# medium bucket and selects, cash dewatering screen during spoil outlet mine tailing material enters, the oversize material is middle cash electricity coal, undersize material enters concentration basin and concentrates, enter filter press after concentrating and carry out press filtration, obtain the coal slime mine tailing.
Because the present invention has adopted technique scheme, improved the efficient that from the coal slime of floatability extreme difference ature of coal, reclaims cleaned coal.Compare with background technology, the present invention has advantages such as the cleaned coal of recovery rate height and saving coal resources.
The present invention is through the test of coal slime experimental shop, and the result is as follows:
Utilize Shenmu County's coal slime (full ash 28.23%) 100.42T to carry out washing, the recovery ash is 10.1% cleaned coal 42.16T, and the mine tailing ash is 61.2%.
Description of drawings
Accompanying drawing is a process chart of the present invention.
The specific embodiment
As shown in drawings, the method that from the coal slime of floatability extreme difference ature of coal, reclaims cleaned coal in the present embodiment, it comprises the following steps:
With coal slime furnishing in the batch mixing pond of floatability extreme difference ature of coal is coal slime pan feeding water below 150 grams per liters, with pump it is squeezed into sink-float machine mixer, flows directly into the sink-float machine by mixer; The material that overflows from the sink-float machine flows to high frequency straight line reciprocating sieve and dewaters, and the oversize material is qualified cleaned coal, and cleaned coal is directly sent into belt feeder and deposited the coal works; Undersize material enters concentration basin and concentrates, and enters filter press after concentrating and carries out press filtration, obtains the coal slime mine tailing;
Sink-float machine underflow materials flows into the medium bucket of 1# three-product cyclone device, squeeze in the 1# three-product cyclone device with the cyclone feed pump, 1# three-product cyclone device cleaned coal outlet overflow water enters the dehydration of high frequency straight line reciprocating sieve, obtain the cleaned coal of cleaned coal ash≤10%, the mine tailing that the spoil outlet of 1# three-product cyclone device is discharged enters 9# medium bucket and handles;
The material that the middle coal export of 1# three-product cyclone device is discharged enters and carries out cleaned coal in the next stage 2# medium bucket and reclaim; The 2# medium pump is sent into material in the 2# medium bucket in the 2# three-product cyclone device, 2# three-product cyclone device cleaned coal outlet overflow water enters the dehydration of high frequency straight line reciprocating sieve, obtain the cleaned coal of cleaned coal ash≤10%, the mine tailing that the spoil outlet of 2# three-product cyclone device is discharged enters 9# medium bucket and handles;
The material that the middle coal export of 2# three-product cyclone device is discharged enters and carries out cleaned coal in the next stage 3# medium bucket and reclaim; The 3# medium pump is sent into material in the 3# medium bucket in the 3# three-product cyclone device, 3# three-product cyclone device cleaned coal outlet overflow water enters the dehydration of high frequency straight line reciprocating sieve, obtain the cleaned coal of cleaned coal ash≤10%, the mine tailing that the spoil outlet of 3# three-product cyclone device is discharged enters 9# medium bucket and handles;
The material that the middle coal export of 3# three-product cyclone device is discharged enters and carries out cleaned coal in the next stage 4# medium bucket and reclaim; The 4# medium pump is sent into material in the 4# medium bucket in the 4# three-product cyclone device, 4# three-product cyclone device cleaned coal outlet overflow water enters the dehydration of high frequency straight line reciprocating sieve, obtain the cleaned coal of cleaned coal ash≤10%, the mine tailing that the spoil outlet of 4# three-product cyclone device is discharged enters 5# medium bucket and handles;
The material that the middle coal export of 4# three-product cyclone device is discharged enters and carries out cleaned coal in the next stage 5# medium bucket and reclaim; The 5# medium pump is sent into material in the 5# medium bucket in the 5# three-product cyclone device, 5# three-product cyclone device cleaned coal outlet overflow water enters the dehydration of high frequency straight line reciprocating sieve, obtain the cleaned coal of cleaned coal ash≤10%, the mine tailing that the spoil outlet of 5# three-product cyclone device is discharged enters 6# medium bucket and handles;
The material that the middle coal export of 5# three-product cyclone device is discharged enters and carries out cleaned coal in the next stage 6# medium bucket and reclaim; The 6# medium pump is sent into material in the 6# medium bucket in the 6# three-product cyclone device, 6# three-product cyclone device cleaned coal outlet overflow water enters the dehydration of high frequency straight line reciprocating sieve, obtain the cleaned coal of cleaned coal ash≤10%, the mine tailing that the spoil outlet of 6# three-product cyclone device is discharged enters 7# medium bucket and handles;
The material that the middle coal export of 6# three-product cyclone device is discharged enters and carries out cleaned coal in the next stage 7# medium bucket and reclaim; The 7# medium pump is sent into material in the 7# medium bucket in the 7# three-product cyclone device, 7# three-product cyclone device cleaned coal outlet overflow water enters the dehydration of high frequency straight line reciprocating sieve, obtain the cleaned coal of cleaned coal ash≤10%, the mine tailing that the spoil outlet of 7# three-product cyclone device is discharged enters 8# medium bucket and handles;
The material that the middle coal export of 7# three-product cyclone device is discharged enters and carries out cleaned coal in the next stage 8# medium bucket and reclaim; The 8# medium pump is sent into material in the 8# medium bucket in the 8# three-product cyclone device, 8# three-product cyclone device cleaned coal outlet overflow water enters the dehydration of high frequency straight line reciprocating sieve, obtain the cleaned coal of cleaned coal ash≤10%, the mine tailing that the spoil outlet of 8# three-product cyclone device is discharged enters 9# medium bucket and handles;
The material that the middle coal export of 8# three-product cyclone device is discharged enters the dehydration of high frequency straight line reciprocating sieve, obtain the cleaned coal of cleaned coal ash≤10%, the 9# medium pump is sent into the material in the 9# medium bucket in the three-product cyclone device, 9# three-product cyclone device cleaned coal outlet overflow water enters mixer, middle coal export material enters 1# medium bucket and selects, cash dewatering screen during spoil outlet mine tailing material enters, the oversize material is middle cash electricity coal, undersize material enters concentration basin and concentrates, enter filter press after concentrating and carry out press filtration, obtain the coal slime mine tailing.
Claims (1)
1. method that reclaims cleaned coal from the coal slime of floatability extreme difference ature of coal, it is characterized in that: it comprises the following steps:
With coal slime furnishing in the batch mixing pond of floatability extreme difference ature of coal is coal slime pan feeding water below 150 grams per liters, with pump it is squeezed into sink-float machine mixer, flows directly into the sink-float machine by mixer; The material that overflows from the sink-float machine flows to high frequency straight line reciprocating sieve and dewaters, and the oversize material is qualified cleaned coal, and cleaned coal is directly sent into belt feeder and deposited the coal works; Undersize material enters concentration basin and concentrates, and enters filter press after concentrating and carries out press filtration, obtains the coal slime mine tailing;
Sink-float machine underflow materials flows into the medium bucket of 1# three-product cyclone device, squeeze in the 1# three-product cyclone device with the cyclone feed pump, 1# three-product cyclone device cleaned coal outlet overflow water enters the dehydration of high frequency straight line reciprocating sieve, obtain the cleaned coal of cleaned coal ash≤10%, the mine tailing that the spoil outlet of 1# three-product cyclone device is discharged enters 9# medium bucket and handles;
The material that the middle coal export of 1# three-product cyclone device is discharged enters and carries out cleaned coal in the next stage 2# medium bucket and reclaim; The 2# medium pump is sent into material in the 2# medium bucket in the 2# three-product cyclone device, 2# three-product cyclone device cleaned coal outlet overflow water enters the dehydration of high frequency straight line reciprocating sieve, obtain the cleaned coal of cleaned coal ash≤10%, the mine tailing that the spoil outlet of 2# three-product cyclone device is discharged enters 9# medium bucket and handles;
The material that the middle coal export of 2# three-product cyclone device is discharged enters and carries out cleaned coal in the next stage 3# medium bucket and reclaim; The 3# medium pump is sent into material in the 3# medium bucket in the 3# three-product cyclone device, 3# three-product cyclone device cleaned coal outlet overflow water enters the dehydration of high frequency straight line reciprocating sieve, obtain the cleaned coal of cleaned coal ash≤10%, the mine tailing that the spoil outlet of 3# three-product cyclone device is discharged enters 9# medium bucket and handles;
The material that the middle coal export of 3# three-product cyclone device is discharged enters and carries out cleaned coal in the next stage 4# medium bucket and reclaim; The 4# medium pump is sent into material in the 4# medium bucket in the 4# three-product cyclone device, 4# three-product cyclone device cleaned coal outlet overflow water enters the dehydration of high frequency straight line reciprocating sieve, obtain the cleaned coal of cleaned coal ash≤10%, the mine tailing that the spoil outlet of 4# three-product cyclone device is discharged enters 5# medium bucket and handles;
The material that the middle coal export of 4# three-product cyclone device is discharged enters and carries out cleaned coal in the next stage 5# medium bucket and reclaim; The 5# medium pump is sent into material in the 5# medium bucket in the 5# three-product cyclone device, 5# three-product cyclone device cleaned coal outlet overflow water enters the dehydration of high frequency straight line reciprocating sieve, obtain the cleaned coal of cleaned coal ash≤10%, the mine tailing that the spoil outlet of 5# three-product cyclone device is discharged enters 6# medium bucket and handles;
The material that the middle coal export of 5# three-product cyclone device is discharged enters and carries out cleaned coal in the next stage 6# medium bucket and reclaim; The 6# medium pump is sent into material in the 6# medium bucket in the 6# three-product cyclone device, 6# three-product cyclone device cleaned coal outlet overflow water enters the dehydration of high frequency straight line reciprocating sieve, obtain the cleaned coal of cleaned coal ash≤10%, the mine tailing that the spoil outlet of 6# three-product cyclone device is discharged enters 7# medium bucket and handles;
The material that the middle coal export of 6# three-product cyclone device is discharged enters and carries out cleaned coal in the next stage 7# medium bucket and reclaim; The 7# medium pump is sent into material in the 7# medium bucket in the 7# three-product cyclone device, 7# three-product cyclone device cleaned coal outlet overflow water enters the dehydration of high frequency straight line reciprocating sieve, obtain the cleaned coal of cleaned coal ash≤10%, the mine tailing that the spoil outlet of 7# three-product cyclone device is discharged enters 8# medium bucket and handles;
The material that the middle coal export of 7# three-product cyclone device is discharged enters and carries out cleaned coal in the next stage 8# medium bucket and reclaim; The 8# medium pump is sent into material in the 8# medium bucket in the 8# three-product cyclone device, 8# three-product cyclone device cleaned coal outlet overflow water enters the dehydration of high frequency straight line reciprocating sieve, obtain the cleaned coal of cleaned coal ash≤10%, the mine tailing that the spoil outlet of 8# three-product cyclone device is discharged enters 9# medium bucket and handles;
The material that the middle coal export of 8# three-product cyclone device is discharged enters the dehydration of high frequency straight line reciprocating sieve, obtain the cleaned coal of cleaned coal ash≤10%, the 9# medium pump is sent into the material in the 9# medium bucket in the three-product cyclone device, 9# three-product cyclone device cleaned coal outlet overflow water enters mixer, middle coal export material enters 1# medium bucket and selects, cash dewatering screen during spoil outlet mine tailing material enters, the oversize material is middle cash electricity coal, undersize material enters concentration basin and concentrates, enter filter press after concentrating and carry out press filtration, obtain the coal slime mine tailing.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108855645A (en) * | 2017-05-12 | 2018-11-23 | 杨林 | A kind of smalls coarse slime classification and sorting unit |
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2010
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Patent Citations (4)
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| US4282088A (en) * | 1980-03-03 | 1981-08-04 | Linatex Corporation Of America | Process for cleaning fine coal |
| CN101502818A (en) * | 2009-03-05 | 2009-08-12 | 煤炭科学研究总院唐山研究院 | Integrated device for hydraulic classification and sorting of coarse slime as well as classification and sorting system |
| CN101554612A (en) * | 2009-05-18 | 2009-10-14 | 杨灵奎 | Method for recovering cleaned coal from coal slurry |
| RU2407594C1 (en) * | 2009-06-29 | 2010-12-27 | Алексей Андреевич Бондаренко | Gravity method of removing high-ash slime from coal dressing muddy water circuit |
Non-Patent Citations (1)
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| 沈丽娟: "螺旋分选机分选无烟煤泥的研究", 《煤炭加工与综合利用》, no. 2, 25 April 1998 (1998-04-25) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108855645A (en) * | 2017-05-12 | 2018-11-23 | 杨林 | A kind of smalls coarse slime classification and sorting unit |
| CN108855645B (en) * | 2017-05-12 | 2020-07-28 | 山西世纪新龙腾科技有限公司 | Fine coal coarse slime grading and sorting unit |
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Application publication date: 20111005 |