CN102179288A - Coal-reselecting process for heavy media coal separation - Google Patents
Coal-reselecting process for heavy media coal separation Download PDFInfo
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- CN102179288A CN102179288A CN2010106212227A CN201010621222A CN102179288A CN 102179288 A CN102179288 A CN 102179288A CN 2010106212227 A CN2010106212227 A CN 2010106212227A CN 201010621222 A CN201010621222 A CN 201010621222A CN 102179288 A CN102179288 A CN 102179288A
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Abstract
The invention discloses a coal-reselecting process for heavy media coal separation. The process comprises the following steps: using a three-product cyclone to sort the raw cleaning coals into three products of clean coals, middling coals and waste rocks; performing the follow-up processes on the clean coals and the waste rocks and placing the middling coals into a reselecting cyclone; and performing various product treatment processes of a main cleaning system on the products acquired by reselecting the middle coals. The process provided by the invention has the advantages that the middle coal reselecting process is added on the basis of original process, the change on original processing equipment is small, the investment is less, the recovery ratio of clean coals is obviously increased, the economic benefit is excellent, the scare resource is saved, and the effect of saving energy and reducing emission is good.
Description
Technical field:
The present invention relates to coal preparation process, relate in particular to dense medium coal cleaning process.
Background technology:
The heavy media coal separation technology is an advanced technology, its technology roughly is: feed coal is after screening, fragmentation, mixing, enter the sorting of three-product cyclone device, sub-elect cleaned coal, middle coal, three kinds of products of spoil, the subsequent technique that three kinds of products that sub-elect enter separately again forms final products.The heavy media coal separation technology is that separating effect or clean coal yield all increase significantly than Coal Jigging Technique, also is at present by the technology of widespread usage.Industry generally believes that the heavy media coal separation technology is ripe relatively, and benefit has reached maximization.Yet through the middle coal of dense medium coal cleaning process is tested, the cleaned coal loss in the discovery in the coal is still higher.Coal preparation plant's cleaned coal being lost in about 9% (ratio of cleaned coal in middle coal) in middle coal that management is good managed bad coal preparation plant about 15%, on average about 10%.The coal amount accounts for about 30% of raw coal total amount in general, and the cleaned coal in being lost in so in the coal just accounts for always goes into to wash about 3.0% of raw coal amount, goes into to wash the raw coal amount year and be 1,000,000 tons coal preparation plant, and year loss cleaned coal is about 3.0 ten thousand tons.From the above, existing dense medium coal cleaning process still has bigger cleaned coal loss in middle coal, and this technology still has the technology space of promoting, and this is that industry technical staff does not recognize.
Summary of the invention:
The object of the present invention is to provide a kind of based on original technology, the dense medium coal cleaning process that clean coal recovery improves.
Coal selects technology again in the heavy media coal separation of the present invention, raw coal is through screening, broken, mixing, by the sorting of three-product cyclone device, sub-elect cleaned coal, middle coal, three kinds of products of spoil, described cleaned coal, spoil enter subsequent treatment process, coal enters and selects technology again in described, and middle coal selects the back products obtained therefrom to enter main each product treatment technology of washing system respectively to carry out conventional treatment again; Middle coal selects technology to comprise again: middle coal enters and selects cyclone to carry out sorting again.
Coal selects cyclone again by entering after the following processing in order in described:
(1) middle coal is introduced crusher in crushing to the granularity that requires;
(2) middle coal is dropped into mixing tank, carry out conventional batch mixing operation and density adjustment;
(3) by pump the middle coal in the mixing tank is squeezed into and selected cyclone to carry out sorting again.
The described cyclone that selects again is the three-product cyclone device, and its product is cleaned coal, middle coal and spoil; Or:
The described cyclone that selects again is two product cyclones, and its product is cleaned coal and middle coal.
Dense medium coal cleaning process of the present invention on the basis of original technology, has increased middle coal and has selected technology again, and the product that middle coal selects again enters the main subsequent treatment process of washing each product in the system and carries out conventional treatment.The present invention changes little to original process equipment, less investment has overcome the technological deficiency that is not realized in the prior art, has further reclaimed the cleaned coal that loses in the coal in original technology.Be that 1,000,000 tons coal preparation plant is an example still to go into to wash the raw coal amount, with the coal separation of original heavy media coal separation technology, year loss cleaned coal is about 3.0 ten thousand tons, utilize technology coal separation of the present invention, coal selects technology again in promptly adding, can reclaim cleaned coal about 1% more, by 1000 yuan/ton of current cleaned coal market prices, the income in coal preparation plant every year can increase about 1,000 ten thousand yuan, the price difference of removing power consumption and electric coal reaches the Master Cost that selects system consumption again, and net income increases about 7,000,000 yuan/year, and its economic benefit is very remarkable, particularly for this scarce resource of coking coal, have more significant meaning from the angle of resource and energy-saving and emission-reduction.
Description of drawings:
Fig. 1 is original process chart.
Fig. 2 is a process chart of the present invention.
The specific embodiment:
The invention will be further described below in conjunction with accompanying drawing.
As shown in Figure 1, original dense medium coal cleaning process, feed coal is anticipated before screening, fragmentation, mixing etc. are selected, enters the sorting of three-product cyclone device, obtain cleaned coal, middle coal, three kinds of products of spoil, three kinds of products enter separately subsequent technique again and handle and obtain final products.
Dense medium coal cleaning process of the present invention as shown in Figure 2, feed coal is anticipated before screening, fragmentation, mixing etc. are selected, enter the sorting of three-product cyclone device, obtain cleaned coal, middle coal, three kinds of products of spoil, cleaned coal, spoil enter product subsequent technique separately, product of coal subsequent technique during middle coal does not enter, but coal selects technology again in entering, middle coal selects technology specifically again:
1, middle coal is introduced crusher in crushing to the granularity that requires;
2, middle coal is dropped into mixing tank, carry out conventional batch mixing operation and density adjustment;
3, by pump the middle coal in the mixing tank is squeezed into and selected cyclone to carry out sorting again.
Selecting cyclone again can be two product cyclones, and its product is cleaned coal and middle coal; Also can be the three-product cyclone device, its product be cleaned coal, middle coal and spoil.
Middle coal selects cleaned coal, the spoil of gained to converge with main cleaned coal, the spoil of washing system respectively again and together enters the product subsequent treatment process, as: cleaned coal forms product by cleaned coal sieve bend, sculping screen etc., and spoil forms product by sculping screen.
Middle coal selects the middle coal of gained to enter the main middle product of coal subsequent technique of system of washing again, as forming product by sieve bend, sculping screen, carries out the recovery of dense media and the processing of black water simultaneously.
Experimental example: do four groups of comparison example, go into to wash raw coal and all use Inner Mongol Wuhai area mixed coal, it is identical that every group of example goes into to wash raw coal, but select technology to carry out sorting again by coal in original dense medium coal cleaning process and the heavy media coal separation of the present invention respectively.Each is organized example and goes into to wash raw coal index difference.Following table is the index situation of each group comparison example:
From above comparison example as can be seen, coal selects technology that the sharpness of separation of raw coal is improved a lot again in the heavy media coal separation of the present invention, and the rate of recovery of cleaned coal improves a lot, and the amount of washing of going into of raw coal also obviously increases.
Claims (4)
1. coal selects technology again in the heavy media coal separation, raw coal is through screening, broken, mixing, by the sorting of three-product cyclone device, sub-elect cleaned coal, middle coal, three kinds of products of spoil, it is characterized in that: described cleaned coal, spoil enter subsequent treatment process, coal enters and selects technology again in described, and middle coal selects the back products obtained therefrom to enter main each product treatment technology of washing system respectively to carry out conventional treatment again; Middle coal selects technology to comprise again:
Middle coal enters and selects cyclone to carry out sorting again.
2. coal selects technology again in the heavy media coal separation as claimed in claim 1, it is characterized in that: coal is in order by entering the described cyclone that selects again in described after the following processing:
(1) middle coal is introduced crusher in crushing to the granularity that requires;
(2) middle coal is dropped into mixing tank, carry out conventional batch mixing operation and density adjustment;
(3) by pump the middle coal in the mixing tank is squeezed into the described cyclone that selects again and carry out sorting.
3. coal selects technology again in the heavy media coal separation as claimed in claim 1, it is characterized in that: the described cyclone that selects again is the three-product cyclone device, and its product is cleaned coal, middle coal and spoil.
4. coal selects technology again in the heavy media coal separation as claimed in claim 1, it is characterized in that: the described cyclone that selects again is two product cyclones, and its product is cleaned coal and middle coal.
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| CN2010106212227A CN102179288A (en) | 2010-12-21 | 2010-12-21 | Coal-reselecting process for heavy media coal separation |
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| CN2010106212227A CN102179288A (en) | 2010-12-21 | 2010-12-21 | Coal-reselecting process for heavy media coal separation |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102861663A (en) * | 2012-10-08 | 2013-01-09 | 中国矿业大学 | Breaking grinding dissociation and re-flotation two-stage recovery process of coal in scarce coking |
| CN103143432A (en) * | 2013-02-28 | 2013-06-12 | 中国矿业大学 | Efficient crushing and three-section type screening method of coking coal gravity middings |
| CN103203280A (en) * | 2012-06-20 | 2013-07-17 | 冯云 | Dense-medium preparation technology for optimizing coal slime |
| CN103394422A (en) * | 2013-07-31 | 2013-11-20 | 神华集团有限责任公司 | Method for separating coal and rock components from raw coal |
| CN103623914A (en) * | 2013-11-20 | 2014-03-12 | 高峰 | Dense medium continuous coal washing process and raw coal continuous crushing method |
| CN105597915A (en) * | 2016-03-11 | 2016-05-25 | 中煤科工集团唐山研究院有限公司 | Wide-grain-grade double-dense-medium process for separating all coarse coal slime |
| CN106179713A (en) * | 2016-07-19 | 2016-12-07 | 四川乔丰新材料科技有限公司 | One exempts from desliming dual medium cyclone dressing technique |
| CN109821648A (en) * | 2019-01-03 | 2019-05-31 | 恩迈特(青岛)新能源科技有限公司 | Coal selects system without pressure three-product HM cyclone again in a kind of jigging |
| 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 |
| CN111437986A (en) * | 2020-03-29 | 2020-07-24 | 新汶矿业集团有限责任公司 | Coal dressing process for on-line recovery of high-ash clean coal from medium coal |
| CN112264180A (en) * | 2020-09-10 | 2021-01-26 | 华电电力科学研究院有限公司 | Dense medium density sorting automatic medium adding system of coal preparation plant and working method |
| CN115106189A (en) * | 2022-06-08 | 2022-09-27 | 淮南矿业(集团)有限责任公司 | Method and system for realizing benefit maximization of coal preparation plant |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103203280A (en) * | 2012-06-20 | 2013-07-17 | 冯云 | Dense-medium preparation technology for optimizing coal slime |
| CN103203280B (en) * | 2012-06-20 | 2015-06-03 | 安徽恒源煤电股份有限公司 | Dense-medium preparation technology for optimizing coal slime |
| CN102861663A (en) * | 2012-10-08 | 2013-01-09 | 中国矿业大学 | Breaking grinding dissociation and re-flotation two-stage recovery process of coal in scarce coking |
| CN103143432A (en) * | 2013-02-28 | 2013-06-12 | 中国矿业大学 | Efficient crushing and three-section type screening method of coking coal gravity middings |
| CN103394422A (en) * | 2013-07-31 | 2013-11-20 | 神华集团有限责任公司 | Method for separating coal and rock components from raw coal |
| CN103623914A (en) * | 2013-11-20 | 2014-03-12 | 高峰 | Dense medium continuous coal washing process and raw coal continuous crushing method |
| CN103623914B (en) * | 2013-11-20 | 2016-01-06 | 韩蕾 | The continuous coal cleaning process of a kind of dense media |
| CN105597915B (en) * | 2016-03-11 | 2018-02-16 | 中煤科工集团唐山研究院有限公司 | The wide dual Jie's whole coarse slime separating process of grade can be achieved in one kind |
| CN105597915A (en) * | 2016-03-11 | 2016-05-25 | 中煤科工集团唐山研究院有限公司 | Wide-grain-grade double-dense-medium process for separating all coarse coal slime |
| CN106179713A (en) * | 2016-07-19 | 2016-12-07 | 四川乔丰新材料科技有限公司 | One exempts from desliming dual medium cyclone dressing technique |
| CN109821648A (en) * | 2019-01-03 | 2019-05-31 | 恩迈特(青岛)新能源科技有限公司 | Coal selects system without pressure three-product HM cyclone again in a kind of jigging |
| 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 |
| CN111437986A (en) * | 2020-03-29 | 2020-07-24 | 新汶矿业集团有限责任公司 | Coal dressing process for on-line recovery of high-ash clean coal from medium coal |
| CN112264180A (en) * | 2020-09-10 | 2021-01-26 | 华电电力科学研究院有限公司 | Dense medium density sorting automatic medium adding system of coal preparation plant and working method |
| CN115106189A (en) * | 2022-06-08 | 2022-09-27 | 淮南矿业(集团)有限责任公司 | Method and system for realizing benefit maximization of coal preparation plant |
| CN115106189B (en) * | 2022-06-08 | 2024-04-30 | 淮南矿业(集团)有限责任公司 | Implementation method and implementation system for maximizing benefits of coal preparation plant |
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Application publication date: 20110914 |