CN101433880B - Method for sorting coal ash - Google Patents
Method for sorting coal ash Download PDFInfo
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- CN101433880B CN101433880B CN2008101885740A CN200810188574A CN101433880B CN 101433880 B CN101433880 B CN 101433880B CN 2008101885740 A CN2008101885740 A CN 2008101885740A CN 200810188574 A CN200810188574 A CN 200810188574A CN 101433880 B CN101433880 B CN 101433880B
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- slag
- jigging
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Abstract
The invention discloses a method for sorting coal clinker and relates to a sorting method for the total recycling of the coal clinker. The method comprises the following steps: a. pre-selecting: the coal clinker is sifted; the coal clinker with particle diameter of more than 20 mm is broken; and the coal clinker with particle diameter of less than 20 mm is for standby; b. jigging: the coal clinker with particle diameter of less than 20 mm and the broken coal clinker are sent to a jigger for jigging and sorting; c. jigging and sorting: heavy clinker with coarse grains is separated from coal ash water; d. sieving: nut coke in the coal ash water is sifted; and e. after the nut coke is sifted, the coal ash water is precipitated; and solid and liquid are separated to obtain clear water and coal ash powder. The method for sorting the coal clinker has the characteristics of practicability, applicability, economy, high efficiency and reliability, can fully recycle the coal clinker, can obtain prominent economic benefit, has remarkable social and environmental benefits and develops a novel effective approach for solving the problem of a recycling technology of the coal clinker.
Description
Technical field
The present invention relates to a kind of method for separating of whole resources of coal ash slag.
Background technology
Since modern times, industry was risen, coal promptly became the energy main body of China, and in following considerable time, still had irreplaceable status.At present, production of China's raw coal year and total quantity consumed surpass 2,000,000,000 tons, are world coal production big country, also are the discharging big countries of coal ash slag.The coal ash slag is the solid ashes behind the coal burning, is mainly the mixture of flyash, boiling furnace slag and fluidized bed combustion coal ash/slag etc.It is estimated that to the end of the year 2007, the burden of China's coal ash slag is above 4,000,000,000 tons; Annual from now on new discharge capacity can not be less than 400,000,000 tons.The flood tide of coal ash slag is thrown aside, and not only takies a lot of soils, and the serious harm environment, and is a kind of huge waste of resource.How to dispose the coal ash slag scientifically and rationally, be the severe challenge that the world today faces jointly, especially China's environmental improvement and comprehensive utilization of resources an emphasis and a difficult point.Because the composition of coal ash slag is very complicated; Almost comprised elements all in the periodic table of elements; Add that the coal ash slag has stronger region, therefore, though many to the comprehensive utilizating research achievement of coal ash slag; But the technology that possesses through engineering approaches, commercial application is also few, and the especially big ash amount of using is down to making the technology of the whole recyclings of coal ash slag very few especially.Cause coal ash slag comprehensive utilization of resources rate and benefit thereof to be paced up and down at reduced levels for a long time.Basic reason is exactly the serious restriction that receives coal ash slag resource technology economy, applicability.Fact proved that the sorting of coal ash slag is promptly carried out necessary classification separation according to the actual demand of utilizing with coal ash slag component, is the key link that at first will solve in the coal ash slag resource.
Summary of the invention
The objective of the invention is to overcome the defective of prior art, provide a kind of ability scientific and reasonable, high-efficiency and economic sorting coal ash slag makes it the method for separating of the coal ash slag of whole resources.
Method for sorting coal ash of the present invention through preliminary election, jigging, screening, deposition, is coal ash powder, coarse grain heavy slag and nut coke with sorting coal ash, the steps include:
A. the coal ash slag is sieved in preliminary election, and particle diameter is broken greater than the coal ash slag of 20mm, and the coal ash slag of not enough 20mm is subsequent use;
B. jigging is sent into jigging machine, the jigging sorting with the coal ash slag of not enough 20mm and the coal ash slag after the fragmentation;
C. jigging sorting, coarse grain heavy slag separates from coal ash water;
D. screening, the nut coke in the screened coal buck;
E. sieved the coal ash water sedimentation behind the nut coke, Separation of Solid and Liquid, clear water and coal ash powder.
The described preliminary election of step a when the coal ash slag is sieved, is sprayed clear water to the coal ash slag.
The described jigging machine of step b is a hydraulic jig.
The described screening of steps d is to adopt the electric and magnetic oscillation sieve bend.
Steps d screening and nut coke, the percentage by weight of nut coke is the heavy slag of 65-80% and surplus.
Step e gained clear water reclaims, and the clear water that is used for step a once more sprays.
The employed equipment of method for sorting coal ash of the present invention mainly is linked in sequence and is formed by screen cloth, breaker, jigging machine, electric and magnetic oscillation sieve bend, precipitation separation device, described screen cloth mesh aperture≤20mm.Precipitation separation device is the multi stage precipitation separator.
Method for sorting coal ash of the present invention; With screen cloth the coal ash slag is carried out prescreening, particle diameter carries out fragmentation greater than after the screening of 20mm, and sprays clear water to the coal ash slag in the time of screening in advance; Can play the effect of pressing dirt and additional jigging medium; Coal ash slag after the fragmentation and particle diameter are together sent into hydraulic jig less than the coal ash slag of 20mm, and hydraulic jig is separated proportion is lighter in the coal ash slag nut coke and coal ash water and the heavier coarse grain heavy slag of proportion, and coal ash powder is suspended in the water.Coarse grain heavy slag is very good building materials raw materials such as making shale brick, and nut coke and coal ash powder sieve with the electric and magnetic oscillation sieve bend, and the electric and magnetic oscillation sieve bend can sieve out with the nut coke of particle diameter greater than 0.3mm; Coal ash powder and water less than 0.3mm then flow into the multi stage precipitation separator, when flowing into sedimentation basin, add the polymer inorganic flocculating agent, and coal ash water will fully mix with flocculating agent; Can adopt the flocculating agent mixed reactor; The passage that this device is joined end to end and constituted by a plurality of arc cavitys, coal ash water and flocculating agent form vortex in the passage that the arc cavity constitutes, increased the impulsive force of coal ash water in the trickling process; Improved the degree of mixing of coal ash water and flocculating agent; The coal ash water that mixes flocculating agent flows into a plurality of sedimentation basins of stepped arrangement from high to low successively, has obtained sufficient post precipitation, and the water that flow in the afterbody pond has been the clear water that can be used in sorting coal ash slag once more; Promptly get coal ash powder after the coal ash paste processed that precipitates and get, can utilize again.Method for sorting coal ash of the present invention, process conditions are ripe, and method is simple, and separating effect is obvious, and water is recyclable to be utilized again, and separation costs is low, and non-waste-emission.According to this method sorting coal ash slag, the gained coal ash powder will mainly be made for soil improvement material etc., and nut coke is made for worker's domestic fuels such as flue-cured tobacco, and coarse grain heavy slag is made for brick-making raw material etc.
Sorting coal ash technology of the present invention has reality, suitable, economic, efficient, reliable characteristics, can make the whole recyclings of coal ash slag, not only can obtain outstanding economic benefit, and have significant social, environmental benefit.Opened up new effective way for solving a coal ash slag resource technology difficult problem.
Description of drawings
Fig. 1 is the flow chart of method for sorting coal ash according to the invention.
The specific embodiment
Embodiment 1
Method for sorting coal ash of the present invention, through preliminary election, jigging, screening, deposition is coal ash powder, coarse grain heavy slag and nut coke with sorting coal ash, the steps include:
A. the coal ash slag is sieved in preliminary election, sprays clear water, mesh size≤20mm to the coal ash slag.Particle diameter is broken greater than the coal ash slag of 20mm, and the coal ash slag of not enough 20mm is subsequent use;
B. jigging is sent into hydraulic jig, the jigging sorting with the coal ash slag of not enough 20mm and the coal ash slag after the fragmentation;
C. jigging sorting, coarse grain heavy slag separates from coal ash water;
D. screening, with the nut coke in the electric and magnetic oscillation sieve bend screened coal buck, the percentage by weight of nut coke is 65% and the heavy slag of surplus.；
E. the coal ash water that has sieved behind the nut coke flows into multi stage precipitation separator deposition, realizes Separation of Solid and Liquid, clear water and coal ash powder.
Embodiment 2
Method for sorting coal ash of the present invention, through preliminary election, jigging, screening, deposition is coal ash powder, coarse grain heavy slag and nut coke with sorting coal ash, the steps include:
A. the coal ash slag is sieved in preliminary election, sprays clear water, mesh size≤20mm to the coal ash slag.Particle diameter is broken greater than the coal ash slag of 20mm, and the coal ash slag of not enough 20mm is subsequent use;
B. jigging is sent into hydraulic jig, the jigging sorting with the coal ash slag of not enough 20mm and the coal ash slag after the fragmentation;
C. jigging sorting, coarse grain heavy slag separates from coal ash water;
D. screening, with the nut coke in the electric and magnetic oscillation sieve bend screened coal buck, the percentage by weight of nut coke is the heavy slag of 65-80% and surplus.；
E. the coal ash water that has sieved behind the nut coke flows into multi stage precipitation separator deposition, realizes Separation of Solid and Liquid, clear water and coal ash powder.
Embodiment 3
Method for sorting coal ash of the present invention, through preliminary election, jigging, screening, deposition is coal ash powder, coarse grain heavy slag and nut coke with sorting coal ash, the steps include:
A. the coal ash slag is sieved in preliminary election, sprays clear water, mesh size≤20mm to the coal ash slag.Particle diameter is broken greater than the coal ash slag of 20mm, and the coal ash slag of not enough 20mm is subsequent use;
B. jigging is sent into hydraulic jig, the jigging sorting with the coal ash slag of not enough 20mm and the coal ash slag after the fragmentation;
C. jigging sorting, coarse grain heavy slag separates from coal ash water;
D. screening, with the nut coke in the electric and magnetic oscillation sieve bend screened coal buck, the percentage by weight of nut coke is 7 3% and the heavy slag of surplus.；
E. the coal ash water that has sieved behind the nut coke flows into multi stage precipitation separator deposition, realizes Separation of Solid and Liquid, clear water and coal ash powder.
Claims (8)
1. a method for sorting coal ash through preliminary election, jigging, screening, deposition, is characterized in that, the steps include:
A. the coal ash slag is sieved in preliminary election, and particle diameter is broken greater than the coal ash slag of 20mm, and the coal ash slag of not enough 20mm is subsequent use;
B. jigging is sent into jigging machine, the jigging sorting with the coal ash slag of not enough 20mm and the coal ash slag after the fragmentation;
C. jigging sorting, coarse grain heavy slag separates from coal ash water;
D. screening, the nut coke in the screened coal buck;
E. sieved the coal ash water sedimentation behind the nut coke, Separation of Solid and Liquid, clear water and coal ash powder.
2. method for sorting coal ash according to claim 1 is characterized in that, the described preliminary election of step a when the coal ash slag is sieved, is sprayed clear water to the coal ash slag.
3. method for sorting coal ash according to claim 1 is characterized in that, the described jigging machine of step b is a hydraulic jig.
4. method for sorting coal ash according to claim 1 is characterized in that, the described screening of steps d is to adopt the electric and magnetic oscillation sieve bend.
5. method for sorting coal ash according to claim 4 is characterized in that, the described screening of steps d, and the aperture of electric and magnetic oscillation sieve bend is 0.3mm.
6. method for sorting coal ash according to claim 1 is characterized in that, steps d screening and nut coke, the percentage by weight of nut coke is the heavy slag of 65-80% and surplus.
7. method for sorting coal ash according to claim 1 is characterized in that, step e gained clear water reclaims, and the clear water that is used for step a sprays.
8. method for sorting coal ash according to claim 1; It is characterized in that; The employed equipment of said method for sorting coal ash mainly is linked in sequence and is formed by screen cloth, breaker, jigging machine, electric and magnetic oscillation sieve bend, precipitation separation device, described screen cloth mesh aperture≤20mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008101885740A CN101433880B (en) | 2008-11-07 | 2008-12-17 | Method for sorting coal ash |
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| CN200810233545.1 | 2008-11-07 | ||
| CN200810233545 | 2008-11-07 | ||
| CN2008101885740A CN101433880B (en) | 2008-11-07 | 2008-12-17 | Method for sorting coal ash |
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| CN101433880B true CN101433880B (en) | 2012-05-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102699013B (en) * | 2012-05-09 | 2015-01-21 | 山东莱芜煤矿机械有限公司 | Pulverized fuel ash comprehensive treatment technique |
| CN103017182B (en) * | 2012-12-19 | 2015-07-08 | 华电电力科学研究院 | System and method for efficiently and economically processing coal ash and bottom slag of coal-fired units of power plants |
| DE102014100725B3 (en) * | 2013-12-23 | 2014-12-31 | Schauenburg Maschinen- Und Anlagen-Bau Gmbh | Process for the treatment of ash from waste incineration plants by wet classification |
| CN105642431B (en) * | 2014-10-13 | 2020-07-28 | 重庆永润新材料有限公司 | Method for gravity separation of sulfur concentrate from sulfur-containing coal gangue |
| CN105498950B (en) * | 2014-11-19 | 2018-04-27 | 晋江市冠兴建材有限责任公司 | A kind of high cinder recovery and processing system of organic efficiency |
| CN104624607B (en) * | 2014-12-24 | 2018-03-23 | 光大环保（中国）有限公司 | Domestic waste incineration residue processing method |
| CN106179712A (en) * | 2016-07-29 | 2016-12-07 | 山东国晟智能装备有限公司 | The jig washer that a kind of coal washing efficiency is high |
| CN107694743A (en) * | 2016-08-09 | 2018-02-16 | 文县白杨林矿业有限公司 | A kind of system of processing and its method that barite is separated from mine tailing |
| CN107952588A (en) * | 2016-10-14 | 2018-04-24 | 中国石油化工股份有限公司 | The technique that carbon is recycled in coal gasification lime-ash |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| SU1549589A1 (en) * | 1987-03-10 | 1990-03-15 | Государственный проектно-конструкторский институт "Гипромашуглеобогащение" | Method of jigging |
| SU1834709A3 (en) * | 1991-04-10 | 1993-08-15 | Kузheцkий Haучho-Иccлeдobateльckий И Пpoektho-Kohctpуktopckий Иhctиtуt Углeoбoгaщehия | Method of coal cleaning |
| CN1085128A (en) * | 1993-09-25 | 1994-04-13 | 中南工业大学 | Concentrating process for coagulating and settling tailings |
| CN1485148A (en) * | 2002-09-24 | 2004-03-31 | 太西集团有限责任公司太西洗煤厂 | Smokeless ultralow ash content pure coal and the production technology thereof |
| CN1548233A (en) * | 2003-05-07 | 2004-11-24 | 赵树彦 | Heavy medium separating process for slime |
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- 2008-12-17 CN CN2008101885740A patent/CN101433880B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1549589A1 (en) * | 1987-03-10 | 1990-03-15 | Государственный проектно-конструкторский институт "Гипромашуглеобогащение" | Method of jigging |
| SU1834709A3 (en) * | 1991-04-10 | 1993-08-15 | Kузheцkий Haучho-Иccлeдobateльckий И Пpoektho-Kohctpуktopckий Иhctиtуt Углeoбoгaщehия | Method of coal cleaning |
| CN1085128A (en) * | 1993-09-25 | 1994-04-13 | 中南工业大学 | Concentrating process for coagulating and settling tailings |
| CN1485148A (en) * | 2002-09-24 | 2004-03-31 | 太西集团有限责任公司太西洗煤厂 | Smokeless ultralow ash content pure coal and the production technology thereof |
| CN1548233A (en) * | 2003-05-07 | 2004-11-24 | 赵树彦 | Heavy medium separating process for slime |
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