CN101559404A - Middlings crushing and sorting technique - Google Patents
Middlings crushing and sorting technique Download PDFInfo
- Publication number
- CN101559404A CN101559404A CN 200910143591 CN200910143591A CN101559404A CN 101559404 A CN101559404 A CN 101559404A CN 200910143591 CN200910143591 CN 200910143591 CN 200910143591 A CN200910143591 A CN 200910143591A CN 101559404 A CN101559404 A CN 101559404A
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- Prior art keywords
- coal
- middlings
- float
- crushing
- sorting
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Links
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000003245 coal Substances 0.000 claims abstract description 72
- 230000018044 dehydration Effects 0.000 claims abstract description 4
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims abstract description 3
- 238000013467 fragmentation Methods 0.000 claims description 9
- 238000006062 fragmentation reaction Methods 0.000 claims description 9
- 238000007667 floating Methods 0.000 claims description 3
- 238000005188 flotation Methods 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 238000004939 coking Methods 0.000 abstract description 15
- 238000003723 Smelting Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract 2
- 238000001238 wet grinding Methods 0.000 abstract 1
- 239000000178 monomer Substances 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 239000004744 fabric Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 229910000805 Pig iron Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000000571 coke Substances 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005029 sieve analysis Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
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Abstract
The invention relates to a middlings crushing and sorting technique, wherein middlings is adopted as a raw material and the technique is conducted according to the following steps: (1) the middlings is put into a crusher for crushing; (2) the crushed middlings is put into a ball mill for wet milling to the optimum average grain diameter; and (3) the crushed middlings runs through an arc-shaped sieve for classification. oversize materials are conveyed into a tail slime dehydration and recovery equipment for processing; undersize materials are conveyed to a float selecting machine for sorting to sort float clean coal with low ash content and float tailings with high ash content; and then the float clean coal and float tailings are conveyed to respective systems for processing. The invention can recover coking coal cleans in the middlings by the crushing and sorting technology, which not only increases the yield of the qualified coking coal cleans for smelting to cause the coking coal cleans to exert better value and increases sales income, but also can ensure full and reasonable recovery and utilization of valuable coking coal resources so as to reduce waste of resources.
Description
Technical field
The present invention relates to a kind of sorting process that grinds of coal, specifically the middle product of coal in the coking coal coal preparation plant is through grinding, reclaim after the sorting the middle coal grinding sorting process of quality fine coal.
Background technology
It is over half that the annual pig iron output of China accounts for the whole world, for smelting the pig iron, needs to produce a large amount of smelting coke.The middle coal that China coking coal coal preparation plant gravity concentration equipment is sub-elected generally all uses as thermal coal, seldom it is further processed.But in these among coal,, get final product monomer separation, therefrom can sub-elect up-to-standard smelting coking coal cleans through fragmentation, after being milled to less than 0.5mm if low ash content cleaned coal belongs to coarse grain embedding cloth with spoil.Because the limitation of China's prior art makes a large amount of valuable coking coal resources waste with the consumption of middle coal, does not bring into play its more favourable value.
Summary of the invention
The present invention be directed to owing to the purposes of product of coal in the present coal preparation plant of China is single, cause the problem of the coking coal cleans serious waste that contains in the coal, provide a kind of and will hang down middle coal that ash content coking coal cleans and high ash content spoil belong to coarse grain embedding cloth and carry out sorting after dissociating, make the middle coal grinding sorting process of the bigger value of its performance through grinding.
Realize the foregoing invention purpose by the following technical solutions: coal grinding sorting process in a kind of, it is a raw material with middle coal, carries out according to following steps:
1. middle coal is sent into and carried out fragmentation in the disintegrating machine;
2. the middle coal after the fragmentation is sent into the ball mill wet ball grinding to best average grain diameter;
3. the middle coal after will grinding is through the sieve bend classification, and oversize is delivered to tail coal mud dehydration reclaimer and handled; Screenings is sent into the flotation device sorting, sub-elects low-ash floatation clean coal and high-ash floating tail-coal, and sending into them separately again, system handles.
Compared with prior art, the present invention can with the coking coal cleans in the middle coal by grind, the technology of sorting reclaimed, and not only increased the output of up-to-standard smelting with coking coal cleans, makes the bigger value of its performance, increases income from sales; But also make valuable coking coal resource obtain fully, reasonably reclaim and utilize, reduce the wasting of resources.
Description of drawings
Fig. 1 is a process chart of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing in detail the present invention is described in detail.
The present invention is applicable to the middle coal that dissociates through low ash content coking coal and high ash content spoil in the coal in can making after grinding, and low ash content coking coal and high ash content spoil belong to the middle coal of coarse grain embedding cloth in the promptly middle coal.
Coal grinding sorting process in this, carry out according to following flow process:
1, middle coal monomer dissociation test: the middle coal coal sample that will be crushed to particle diameter≤6mm is carried out the wet ball grinding test of different time, and every part of sample behind the wet ball grinding carries out the granularmetric composition test by GB/T19093 " sieve analysis of powery coal method "; Carry out substep by MT/T 144 " the coal separation laboratory discharges the float test method step by step " and discharge float test, and draw cleans ash, productive rate curve, determine at the clean coal yield that meets under the cleans ash condition;
2, determining of the best average grain diameter of monomer separation:, determine the best average grain diameter of monomer separation by following formula with meeting the sieve test result that clean coal yield under the cleans ash condition reaches the highest sample:
In the formula: d-average grain diameter, mm
r
i-certain grade productive rate, %
d
i-certain grade arithmetic mean diameter, mm.
3, select the type of ball mill: with best average grain diameter is foundation, selects the ball mill that meets this best average grain diameter for use.
4, the fragmentation of middle coal and sorting:
1. middle coal is sent into and carried out fragmentation in the disintegrating machine, the middle coal particle diameter≤6mm after the assurance fragmentation;
2. the middle coal after the fragmentation is sent into the ball mill wet ball grinding that chooses to best average grain diameter;
3. the middle coal after will grinding is transported to sieve bend and carries out classification, and its oversize is high-ash coarse grain, delivers to tail coal mud dehydration reclaimer and handles; Its screenings is sent into flotation device, and the low-ash floatation clean coal that sub-elects is delivered to cleaned coal mud recovery system, the high ash content floating tail-coal that sub-elects is delivered to one section thickener reclaim.
More than disclosed be one embodiment of the present of invention only, but the present invention is not limited thereto, any those skilled in the art can think variation, all should drop within protection scope of the present invention.
Claims (1)
1, a kind of middle coal grinding sorting process is characterized in that it is a raw material with middle coal, carries out according to following steps:
1. middle coal is sent into and carried out fragmentation in the disintegrating machine;
2. the middle coal after the fragmentation is sent into the ball mill wet ball grinding to best average grain diameter;
3. the middle coal after will grinding is through the sieve bend classification, and oversize is delivered to tail coal mud dehydration reclaimer and handled; Screenings is sent into the flotation device sorting, sub-elects low-ash floatation clean coal and high-ash floating tail-coal, and sending into them separately again, system handles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910143591 CN101559404B (en) | 2009-06-05 | 2009-06-05 | Middlings crushing and sorting technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910143591 CN101559404B (en) | 2009-06-05 | 2009-06-05 | Middlings crushing and sorting technique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101559404A true CN101559404A (en) | 2009-10-21 |
| CN101559404B CN101559404B (en) | 2013-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910143591 Active CN101559404B (en) | 2009-06-05 | 2009-06-05 | Middlings crushing and sorting technique |
Country Status (1)
| Country | Link |
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| CN (1) | CN101559404B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102357428A (en) * | 2011-10-27 | 2012-02-22 | 唐山国华科技国际工程有限公司 | Novel floatation process capable of ensuring upper limit of fed material granularity and improving dehydration effect of foam product |
| CN102357405A (en) * | 2011-08-21 | 2012-02-22 | 太原艾柯夫选煤技术有限公司 | Middling coal crushing, recleaning and quality improving method |
| CN102430480A (en) * | 2011-10-19 | 2012-05-02 | 中国矿业大学 | Coarse clean coal regrinding recleaning separation technique |
| CN103143448A (en) * | 2013-04-03 | 2013-06-12 | 张京三 | Method for extracting float coal, ferrous sulfide and kaoline from gangue through flotation |
| CN103184059A (en) * | 2011-12-31 | 2013-07-03 | 山西沁新能源集团股份有限公司 | Clean heat recovery coke oven coke by-product high-ash coke powder industrial purification method |
| CN104722389A (en) * | 2015-03-02 | 2015-06-24 | 中国矿业大学 | Dissociating, independent slurry mixing and bulk floatation process for fine grain middings |
| CN104826727A (en) * | 2015-04-27 | 2015-08-12 | 中国矿业大学 | Fine-grained medium coal multistage grinding floating technology and system |
| CN105728180A (en) * | 2016-03-22 | 2016-07-06 | 中国矿业大学 | Treating recycling technology of low-ash coking floatation tailings |
| CN105562187B (en) * | 2016-02-24 | 2018-06-01 | 福建将乐天马生物质能源有限公司 | A kind of particulate coal grinding device |
| CN109746115A (en) * | 2019-02-01 | 2019-05-14 | 中国矿业大学 | It is a kind of coke rich coal middle coal intergrowth multistage dissociation-column joint select technique again |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU5717786A (en) * | 1985-05-10 | 1986-11-13 | Babcock & Wilcox Co., The | Coal-water fuel |
| JPH0711268A (en) * | 1991-12-27 | 1995-01-13 | Nippon Com Kk | Production of deashed high-concentration coal-water slurry |
| CN1088628C (en) * | 1998-03-10 | 2002-08-07 | 郭瑞卿 | Adjustable spin cyclone and adjustable spin middlings washing device |
-
2009
- 2009-06-05 CN CN 200910143591 patent/CN101559404B/en active Active
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102357405A (en) * | 2011-08-21 | 2012-02-22 | 太原艾柯夫选煤技术有限公司 | Middling coal crushing, recleaning and quality improving method |
| CN102430480A (en) * | 2011-10-19 | 2012-05-02 | 中国矿业大学 | Coarse clean coal regrinding recleaning separation technique |
| CN102357428A (en) * | 2011-10-27 | 2012-02-22 | 唐山国华科技国际工程有限公司 | Novel floatation process capable of ensuring upper limit of fed material granularity and improving dehydration effect of foam product |
| CN103184059A (en) * | 2011-12-31 | 2013-07-03 | 山西沁新能源集团股份有限公司 | Clean heat recovery coke oven coke by-product high-ash coke powder industrial purification method |
| CN103143448A (en) * | 2013-04-03 | 2013-06-12 | 张京三 | Method for extracting float coal, ferrous sulfide and kaoline from gangue through flotation |
| CN104722389A (en) * | 2015-03-02 | 2015-06-24 | 中国矿业大学 | Dissociating, independent slurry mixing and bulk floatation process for fine grain middings |
| CN104722389B (en) * | 2015-03-02 | 2018-10-30 | 中国矿业大学 | Coal dissociation-is independently sized mixing-bulk flotation technique in a kind of particulate |
| CN104826727A (en) * | 2015-04-27 | 2015-08-12 | 中国矿业大学 | Fine-grained medium coal multistage grinding floating technology and system |
| CN105562187B (en) * | 2016-02-24 | 2018-06-01 | 福建将乐天马生物质能源有限公司 | A kind of particulate coal grinding device |
| CN105728180A (en) * | 2016-03-22 | 2016-07-06 | 中国矿业大学 | Treating recycling technology of low-ash coking floatation tailings |
| CN105728180B (en) * | 2016-03-22 | 2018-01-09 | 中国矿业大学 | A kind of processing recovery process of low grey coking floating tail-coal |
| CN109746115A (en) * | 2019-02-01 | 2019-05-14 | 中国矿业大学 | It is a kind of coke rich coal middle coal intergrowth multistage dissociation-column joint select technique again |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101559404B (en) | 2013-04-17 |
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Address after: Room 618, 6 / F, building 1, yard 9, Longyue street, Mapo Town, Shunyi District, Beijing Patentee after: Beijing Guohua Technology Co.,Ltd. Address before: 100080, No. 16, 11 middle street, Beijing, Haidian, 5, unit 1105 Patentee before: ZHONGKUANG LVNENG (BEIJING) ENGINEERING TECHNOLOGY Co.,Ltd. |