CN104069939A - Fine coal sorting method - Google Patents
Fine coal sorting method Download PDFInfo
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- CN104069939A CN104069939A CN201410298094.5A CN201410298094A CN104069939A CN 104069939 A CN104069939 A CN 104069939A CN 201410298094 A CN201410298094 A CN 201410298094A CN 104069939 A CN104069939 A CN 104069939A
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Abstract
The invention relates to a fine coal sorting method. The fine coal sorting method includes: using a first classifying screen to screen fine coal, using a second classifying screen to screen the fine coal, and using a slime removal screen to achieve fine coal sorting; conveying the sorted fine coal with slime to the other sorting devices for subsequent sorting; conveying the pure fine coal to a product bin. Compared with the prior art, the fine coal sorting method is high in sorting accuracy, improves sorting efficiency, reduces energy consumption, and simplifies production and maintenance.
Description
Technical field
The present invention relates to coal separation technical field, particularly a kind of smalls method for separating.
Background technology
In the former design of coal preparation plant's reconstruction and extension project, raw coal sizing screen sieve seam is 13mm, and the screenings of classification section is to 3003 last raw coal drag conveyors, and the screenings of the desliming section of prewetting has removed desliming screen, desliming screen oversize end removing coal separation system, screenings goes slime water system.
In the situation that coal preparation plant's production Central Plains calorific value of coal is higher, production technology can be defined as smalls and not enter to wash, and lump coal enters to wash.Now, smalls dense medium system should not turn round in theory.But because the raw coal sizing screen desliming section screenings of prewetting has entered desliming screen, oversize must end removing coal dense medium system, although measure fewerly, still need to open smalls dense medium system, otherwise desliming screen oversize do not have source.Due to the unlatching of smalls dense medium system, cause the increase of the material consumptions such as power consumption, water consumption, medium, medicament, increase without reason washing cost.
Summary of the invention
It is high that technical problem to be solved by this invention is to provide a kind of sharpness of separation, improved the efficiency of separation, reduced energy consumption, the easy smalls method for separating of producing and safeguarding.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of smalls method for separating, comprises the following steps:
Step 1: raw coal, after the first classifying screen screening, obtains the first oversize and the first screenings, and the first screenings enters raw coal drag conveyor, and the first oversize enters the second classifying screen;
Step 2: the smalls in the first screenings is delivered to smalls sealing-tape machine by raw coal drag conveyor, smalls is sent to product storehouse by smalls sealing-tape machine, and the smalls that is mixed with earth in the first screenings is delivered to desliming screen by raw coal drag conveyor;
Step 3: the second separating sieve is sprayed water and prewetted the first oversize, the row filter of going forward side by side, obtains the second oversize and the second screenings, and the second oversize enters shallow slot and carries out flotation, and the second screenings directly enters slurry circulating system or enters desliming screen;
Step 4: desliming screen screens the smalls that is mixed with earth, obtains the 3rd oversize and the 3rd screenings, and the 3rd oversize enters smalls dense medium system and processes, and the 3rd screenings enters slurry circulating system and processes.
The invention has the beneficial effects as follows: the second screenings directly enters slurry circulating system or enters desliming screen, the second screenings both can have been gone on desliming screen sieve, also can cross desliming screen and directly enter slime water system, smalls dense medium system just can be opened, improve the efficiency of separation, reduce energy consumption, easy produced and safeguard.
On the basis of technique scheme, the present invention can also do following improvement.
Further technical scheme, the sieve seam of described the second separating sieve is 3mm.
Further technical scheme, the sieve seam of described the first separating sieve is 13mm.
Adopt the beneficial effect of above-mentioned further scheme to be: the second screenings enters desliming screen by pipeline, in the time that sieve seam is 3mm, thereby can prevent that ut from entering pipeline accumulation and causing pipeline blockage, give and produce and safeguard and bring very large facility.
Brief description of the drawings
Fig. 1 is a kind of smalls method for separating of the present invention flow chart.
Detailed description of the invention
Below in conjunction with accompanying drawing, principle of the present invention and feature are described, example, only for explaining the present invention, is not intended to limit scope of the present invention.
As shown in Figure 1, a kind of smalls method for separating, comprises the following steps:
Step 1: raw coal, after the first classifying screen screening, obtains the first oversize and the first screenings, and the first screenings enters raw coal drag conveyor, and the first oversize enters the second classifying screen;
Step 2: the smalls in the first screenings is delivered to smalls sealing-tape machine by raw coal drag conveyor, smalls is sent to product storehouse by smalls sealing-tape machine, and the smalls that is mixed with earth in the first screenings is delivered to desliming screen by raw coal drag conveyor;
Step 3: the second separating sieve is sprayed water and prewetted the first oversize, the row filter of going forward side by side, obtains the second oversize and the second screenings, and the second oversize enters shallow slot and carries out flotation, and the second screenings directly enters slurry circulating system or enters desliming screen;
Step 4: desliming screen screens the smalls that is mixed with earth, obtains the 3rd oversize and the 3rd screenings, and the 3rd oversize enters smalls dense medium system and processes, and the 3rd screenings enters slurry circulating system and processes.
The sieve seam of described the second separating sieve is 3mm.
The sieve seam of described the first separating sieve is 13mm.
The second screenings directly enters slurry circulating system or enters desliming screen, the second screenings both can have been gone on desliming screen sieve, also can cross desliming screen and directly enter slime water system, smalls dense medium system just can be opened, improve the efficiency of separation, reduce energy consumption, easy produced and safeguard; The second screenings enters desliming screen by pipeline, in the time that sieve seam is 3mm, thereby can prevent that ut from entering pipeline accumulation and causing pipeline blockage, gives and produces and safeguard and bring very large facility.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (3)
1. a smalls method for separating, is characterized in that: comprise the following steps:
Step 1: raw coal, after the first classifying screen screening, obtains the first oversize and the first screenings, and the first screenings enters raw coal drag conveyor, and the first oversize enters the second classifying screen;
Step 2: the smalls in the first screenings is delivered to smalls sealing-tape machine by raw coal drag conveyor, smalls is sent to product storehouse by smalls sealing-tape machine, and the smalls that is mixed with earth in the first screenings is delivered to desliming screen by raw coal drag conveyor;
Step 3: the second separating sieve is sprayed water and prewetted the first oversize, the row filter of going forward side by side, obtains the second oversize and the second screenings, and the second oversize enters shallow slot and carries out flotation, and the second screenings directly enters slurry circulating system or enters desliming screen;
Step 4: desliming screen screens the smalls that is mixed with earth, obtains the 3rd oversize and the 3rd screenings, and the 3rd oversize enters smalls dense medium system and processes, and the 3rd screenings enters slurry circulating system and processes.
2. a kind of smalls method for separating according to claim 1, is characterized in that: the sieve seam of described the second separating sieve is 3mm.
3. a kind of smalls method for separating according to claim 1, is characterized in that: the sieve seam of described the first separating sieve is 13mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410298094.5A CN104069939A (en) | 2014-06-27 | 2014-06-27 | Fine coal sorting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410298094.5A CN104069939A (en) | 2014-06-27 | 2014-06-27 | Fine coal sorting method |
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| CN104069939A true CN104069939A (en) | 2014-10-01 |
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| CN201410298094.5A Pending CN104069939A (en) | 2014-06-27 | 2014-06-27 | Fine coal sorting method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105964392A (en) * | 2016-06-20 | 2016-09-28 | 中国神华能源股份有限公司 | Coal dressing and desliming system |
| CN106241411A (en) * | 2016-08-18 | 2016-12-21 | 武汉同力智能***股份有限公司 | A kind of optimization method of Power Plant Bunker Automatic coal blending |
| CN111841872A (en) * | 2020-07-23 | 2020-10-30 | 中国矿业大学 | Comprehensive upgrading and efficiency increasing process method for low-quality coal resources |
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| CN103623918A (en) * | 2013-12-10 | 2014-03-12 | 煤炭工业济南设计研究院有限公司 | Steam coal washing processing method for easy-to-argillization gangues |
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Patent Citations (2)
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| CN103341398A (en) * | 2013-06-18 | 2013-10-09 | 王成江 | Coal separation method in which lump coal and fine coal dense media share same recovery system |
| CN103623918A (en) * | 2013-12-10 | 2014-03-12 | 煤炭工业济南设计研究院有限公司 | Steam coal washing processing method for easy-to-argillization gangues |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105964392A (en) * | 2016-06-20 | 2016-09-28 | 中国神华能源股份有限公司 | Coal dressing and desliming system |
| CN106241411A (en) * | 2016-08-18 | 2016-12-21 | 武汉同力智能***股份有限公司 | A kind of optimization method of Power Plant Bunker Automatic coal blending |
| CN111841872A (en) * | 2020-07-23 | 2020-10-30 | 中国矿业大学 | Comprehensive upgrading and efficiency increasing process method for low-quality coal resources |
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Application publication date: 20141001 |