CN101797532A - Coal separating process of crude coal slime hydroseparation - Google Patents
Coal separating process of crude coal slime hydroseparation Download PDFInfo
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- CN101797532A CN101797532A CN 201010140897 CN201010140897A CN101797532A CN 101797532 A CN101797532 A CN 101797532A CN 201010140897 CN201010140897 CN 201010140897 CN 201010140897 A CN201010140897 A CN 201010140897A CN 101797532 A CN101797532 A CN 101797532A
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Abstract
The invention relates to a coal separating process of crude coal slime hydroseparation, belonging to a coal separating technology. The following technological procedures are added to a traditional crude coal slime hydroseparation process: coal slime water enters a coal slime screen drainage pool and then is conveyed into an inclined plate depositing tank through a water pump to finish the concentration and grading operations of the coal slime water, wherein an inclined plate overflows and enters a flotation system, and the bottom of the inclined plate flows through a buffer tank and enters a crude coal slime hydroseparator; and circulating water in a circulating water pool is sent into the crude coal slime hydroseparator for carrying out separation operations through a water circulating pump, a valve, a check valve, a pressure reducing valve, a pressure gage and an electromagnetic flow meter through a U-shaped pipeline. The process improves the separation effect and the separation efficiency of the crude coal slime, reduces the coal loss and the coal separation processing cost and optimizes the coal separation and treatment process of the crude coal slime.
Description
Technical field
The invention belongs to coal preparation technique, relate generally to a kind of coarse slime waterpower sorting process technology.
Background technology
It is an important techniques design in coal preparation plant's design that coarse slime reclaims technology.At present, in the coarse slime waterpower sorting process process commonly used, all be to carry out separation operation in the coarse slime hydroseparator with directly sending into through preparation work, the post-job black water of gravity separation, since this process not before the sorting of coarse slime waterpower design to black water concentrate, classification, buffering current stabilization operation procedure, enter the clear water pressure transient in the coarse slime hydroseparator in addition, making technology exist the coarse slime pan feeding to supply water fluctuates, separation of coarse slime efficient is low, clean coal recovery is low, and Coal Loss increases.
Summary of the invention
Purpose of the present invention is exactly the problem that exists at above-mentioned prior art, design provides the coal preparation technique of a kind of coarse slime waterpower sorting, by before the sorting of coarse slime waterpower, increase design to black water concentrate, classification, buffering current stabilization operation, and accurately control enters recirculated water supply in the coarse slime waterpower process of separation, reach improve separation of coarse slime efficient, effectively reclaim cleaned coal in the coarse slime, reduce Coal Loss, reduce the coal separation processing cost, optimize the purpose of coarse slime coal separation treatment process.
The object of the present invention is achieved like this: the coal preparation technique of coarse slime waterpower sorting comprises cleaned coal muddy water that black water overflows from coarse slime hydroseparator overfall and the rough coal muddy water of discharging from underflow opening, wherein cleaned coal muddy water obtains cleaned coal after adopting sieve bend and coal slime centrifuge to finish dewatering operation successively, and the part black water of discharging from sieve bend and coal slime centrifuge enters floatation system and finishes separation operation; Rough coal muddy water obtains tail coal behind high-frequency dewatering screen, enter floatation system from the following black water of discharging of high-frequency dewatering screen sieve and finish separation operation, increased before the coarse slime waterpower sorting of aforementioned technology and be provided with following technical process: black water enters in the slurging screen backwater pond, input to through water pump and to finish concentrating in the inclined plate depositing tank black water, graded operation, wherein the hang plate overflow granularity is less than 0.25mm, gravity flow enters into floatation system, hang plate underflow solid concentration is 44%, granularity is 2-0.25mm, and the baffle-box of flowing through certainly enters in the coarse slime hydroseparator; Recirculated water in the circulating water pool carries out separation operation sending into by the inverted U-shaped pipeline through valve, non-return valve, pressure-reducing valve, Pressure gauge, electromagnetic flowmeter under the conveying of water circulating pump in the coarse slime hydroseparator.
The present invention compared with the prior art, fully shown following advantage: 1, supply with recirculated water to the coarse slime hydroseparator, for sorting provides power, the bed of support separator inside, for sorting creates conditions, recirculated water contains coal slime, has improved the density of separating medium, obviously improve separating effect, the efficiency of separation improves 1%; 2, before coarse slime entered the coarse slime hydroseparator, the pan feeding buffering current stabilization operation that has increased for separator provides stable liquid level, had reduced the pan feeding shock vibration, helps to improve separating effect, and the efficiency of separation improves 1%; 3, supply with recirculated water for stable to the coarse slime hydroseparator, adopt valve, non-return valve, pressure-reducing valve, Pressure gauge, the flow of electromagnetic flowmeter control recirculated water and the method for pressure, solved because the variation of coarse slime washability causes the problem that the efficiency of separation is low, improve the rate of recovery of cleaned coal in the adaptability of coarse slime hydroseparator sorting and the coarse slime, reduced cleaned coal loss 2%.
The specific embodiment
Give an actual example below and describe the present invention.
Raw coal is through preparation work, granularity is 50-2mm, enter the gravity separation operation, granularity is that the following black water of 2mm enters in the slurging screen backwater pond, pipeline by diameter 200mm is connected with water pump, black water enters concentrated, the graded operation of finishing in the inclined plate depositing tank black water under the effect of water pump, wherein the hang plate overflow granularity is less than 0.25mm, and gravity flow enters into flotation device; Hang plate underflow solid concentration is 44%, granularity is 2-0.25mm, enter in the coarse slime hydroseparator from the baffle-box of flowing through by pipeline, baffle-box plays the effect that reduces the black water movement velocity, black water slowly enters into the coarse slime hydroseparator, the reduction of black water movement velocity, make the impulse force enter the coarse slime hydroseparator be reduced and alleviate, avoided the impulse force of water movement influence the subsiding movement of a separator inside industry, improved the efficiency of separation of separator.Recirculated water in the circulating water pool carries out separation operation sending into by the inverted U-shaped pipeline through valve, non-return valve, pressure-reducing valve, Pressure gauge, electromagnetic flowmeter under the conveying of water circulating pump in the coarse slime hydroseparator.The size of valve control current; the aqueous reflux of coarse slime hydroseparator inside turned back in the circulating water pool when non-return valve was avoided shutting down; unsettled impulsive force when pressure-reducing valve can effectively prevent water circulating pump work; Pressure gauge and electromagnetic flowmeter have shown the flow and the pressure parameter of quantity of circulating water, for the coarse slime hydroseparator provides the sorting condition.The coarse slime hydroseparator needs the pressure of 0.2Mpa recirculated water, for separator inside bed support gets up to create conditions, for separation of coarse slime provides the sorting space.
When factory of coal preparation plant type is 0.6-0.9Mt/a, adopt Φ 2000 coarse slime hydroseparators, need 50-60M
3The recirculated water of/h.When factory's type is 1.2-1.5Mt/a, adopt Φ 2500 coarse slime hydroseparators, need 70-80M
3The recirculated water of/h.The coarse slime hydroseparator efficiency of separation reaches 93%, and the cleaned coal after the sorting flows automatically to sieve bend and dewaters, and the sieve bend sieve diameter is 0.5mm, and cleaned coal enters into the coal slime centrifuge and further dewaters on the sieve, obtains head coal product.Coarse slime hydroseparator tail coal is got rid of by three debris tubes, concentrates and enters into the dehydration that high-frequency dewatering screen carries out the tail coal product, finally obtains tail coal.
Claims (1)
1. the coal preparation technique of coarse slime waterpower sorting, comprise cleaned coal muddy water that black water overflows from coarse slime hydroseparator overfall and the rough coal muddy water of discharging from underflow opening, wherein cleaned coal muddy water obtains cleaned coal after adopting sieve bend and coal slime centrifuge to finish dewatering operation successively, and the part black water of discharging from sieve bend and coal slime centrifuge enters floatation system and finishes separation operation; Rough coal muddy water obtains tail coal behind high-frequency dewatering screen, enter floatation system from the following black water of discharging of high-frequency dewatering screen sieve and finish separation operation, it is characterized in that increasing before the coarse slime waterpower sorting of aforementioned technology and be provided with following technical process: black water enters in the slurging screen backwater pond, input to through water pump and to finish concentrating in the inclined plate depositing tank black water, graded operation, wherein the hang plate overflow granularity is less than 0.25mm, gravity flow enters into floatation system, hang plate underflow solid concentration is 44%, granularity is 2-0.25mm, and the baffle-box of flowing through certainly enters in the coarse slime hydroseparator; Recirculated water in the circulating water pool carries out separation operation sending into by the inverted U-shaped pipeline through valve, non-return valve, pressure-reducing valve, Pressure gauge, electromagnetic flowmeter under the conveying of water circulating pump in the coarse slime hydroseparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201010140897 CN101797532A (en) | 2010-04-07 | 2010-04-07 | Coal separating process of crude coal slime hydroseparation |
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| CN 201010140897 CN101797532A (en) | 2010-04-07 | 2010-04-07 | Coal separating process of crude coal slime hydroseparation |
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| CN101797532A true CN101797532A (en) | 2010-08-11 |
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| CN 201010140897 Pending CN101797532A (en) | 2010-04-07 | 2010-04-07 | Coal separating process of crude coal slime hydroseparation |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102059174A (en) * | 2010-12-19 | 2011-05-18 | 烟台金华选煤工程有限公司 | Cleaned coal dehydration process and equipment combination for realizing same |
| CN102363138A (en) * | 2011-11-03 | 2012-02-29 | 中国矿业大学(北京) | Control method for super extra gravity settling separator |
| CN102430476A (en) * | 2011-09-29 | 2012-05-02 | 云南文山斗南锰业股份有限公司 | Recovery apparatus and recovery method for microfine manganese ore |
| CN103816992A (en) * | 2014-03-26 | 2014-05-28 | 威海市海王旋流器有限公司 | Coarse slime dense medium sorting technology and system |
| CN104307624A (en) * | 2014-08-27 | 2015-01-28 | 山东科技大学 | Coal slime recovery device and process |
| CN110510413A (en) * | 2019-09-20 | 2019-11-29 | 中煤科工集团武汉设计研究院有限公司 | A kind of pipeline coarse granule coal slurry device and its delivery method |
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| CN1872420A (en) * | 2006-06-29 | 2006-12-06 | 新汶矿业集团有限责任公司华丰煤矿 | Production system of jigging selection of coal |
| CN101602029A (en) * | 2009-06-27 | 2009-12-16 | 勃利县森清能源开发有限公司 | From raw coal and select the technology of cleaned coal in the locked middlings of coal |
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2010
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| GB1332121A (en) * | 1969-07-03 | 1973-10-03 | Floatex Separations Ltd | Separation of particulate materials |
| CN1872420A (en) * | 2006-06-29 | 2006-12-06 | 新汶矿业集团有限责任公司华丰煤矿 | Production system of jigging selection of coal |
| CN101602029A (en) * | 2009-06-27 | 2009-12-16 | 勃利县森清能源开发有限公司 | From raw coal and select the technology of cleaned coal in the locked middlings of coal |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102059174A (en) * | 2010-12-19 | 2011-05-18 | 烟台金华选煤工程有限公司 | Cleaned coal dehydration process and equipment combination for realizing same |
| 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 |
| CN102430476A (en) * | 2011-09-29 | 2012-05-02 | 云南文山斗南锰业股份有限公司 | Recovery apparatus and recovery method for microfine manganese ore |
| CN102363138A (en) * | 2011-11-03 | 2012-02-29 | 中国矿业大学(北京) | Control method for super extra gravity settling separator |
| CN103816992A (en) * | 2014-03-26 | 2014-05-28 | 威海市海王旋流器有限公司 | Coarse slime dense medium sorting technology and system |
| CN103816992B (en) * | 2014-03-26 | 2018-08-21 | 威海市海王旋流器有限公司 | A kind of coarse slime dense medium sorting process and system |
| CN104307624A (en) * | 2014-08-27 | 2015-01-28 | 山东科技大学 | Coal slime recovery device and process |
| CN110510413A (en) * | 2019-09-20 | 2019-11-29 | 中煤科工集团武汉设计研究院有限公司 | A kind of pipeline coarse granule coal slurry device and its delivery method |
| CN110510413B (en) * | 2019-09-20 | 2020-05-15 | 中煤科工集团武汉设计研究院有限公司 | Device and method for conveying coarse-particle coal slurry through pipeline |
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Application publication date: 20100811 |