CN104722389A - Dissociating, independent slurry mixing and bulk floatation process for fine grain middings - Google Patents
Dissociating, independent slurry mixing and bulk floatation process for fine grain middings Download PDFInfo
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- CN104722389A CN104722389A CN201510092808.1A CN201510092808A CN104722389A CN 104722389 A CN104722389 A CN 104722389A CN 201510092808 A CN201510092808 A CN 201510092808A CN 104722389 A CN104722389 A CN 104722389A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
- B03B1/04—Conditioning for facilitating separation by altering physical properties of the matter to be treated by additives
Abstract
The invention discloses a dissociating, independent slurry mixing and bulk floatation process for fine grain middings and belongs to the technical field of coal slime floatation. The process comprises the first step of slurry mixing operation, the second step of roughing, the third step of dehydration and fine floatation operation, the fourth step of separation and desliming operation, the fifth step of coarse slime separation operation, the sixth step of desliming operation and the seventh step of ore grinding operation. According to the independent slurry mixing bulk floatation process for dissociating the coal from the fine grains, the procedure is simple, investment is small, energy consumption is low, the operation cost is low, the separation efficiency is high, and economical benefits are remarkable.
Description
Technical field
The present invention relates to coal slime flotation technical field, particularly relate to and be a kind ofly applicable to the more height ash difficult separation coal mud sorting process of middle coal intergrowth.
Background technology
Along with mechanical coal mining degree improves constantly and coal resources reduce gradually, China is selected in ature of coal and is constantly deteriorated, and high grey difficult separation coal cement content also increases gradually, brings greatly challenge to the efficient separation of coal resources and purifying utilization.High grey difficult separation coal mud main manifestations is characterized as that high, the middle coal content of ash content is large, floatability is poor, and the outstanding problem faced when sorting is exactly that cleans ash exceeds standard, and tail coal ash content is low.The height ash difficult separation coal mud that in the middle of general floatation process sorting, intergrowth is many is difficult to reach ideal effect, if the middle grey coal slime that part is not dissociated enters cleaned coal, then cleans ash exceeds standard, and then tail coal ash content is low to enter tail coal, does not understand and must be affected from separating effect; If dissociate to it, cause again the problem of thin sludge-polluted aggravation, this mainly in coal dissociate while the granularity of coal and spoil all greatly reduced before ore grinding, the thin cement content of high ash is also greatly increasing after grinding, this part coal slime in time entering flotation together with float coal mud because the competitive Adsorption of thin mud makes it become even more serious to the pollution of cleaned coal, cleans ash exceeds standard, even if separating effect is also not ideal enough when dissociating.
Annoying scholar in the industry about the thin sludge-polluted serious problems of height grey difficult separation coal mud, the competitive Adsorption of thin mud to medicament exacerbates runs thick, is easily carried secretly pollution cleaned coal simultaneously always, run thick with to pollute and the present situation of depositing is difficult to improve always.Many experts appreciate the different flotation characteristics of thick fine slime, and increase the coarse grain rate of recovery and the selective decreasing pollution of particulate by flotation conditions optimization, but ignore the process of sizing mixing in advance before flotation operation.If realize medicament and Selective feeding by process intensification of sizing mixing to adsorb and run that thick to improve the efficiency of separation with thin sludge-polluted problem of great advantage for solving in floatation process.For coal intergrowth content in height grey difficult separation coal mud cause more the problem of efficiency of separation difference propose a kind of can effectively solve ore grinding after thin sludge-polluted and flotation to run slightly serious simply effective sorting process significant for promoting coal resources to clean to utilize.
Summary of the invention
The present invention is intended to provide the sorting process of the height ash difficult separation coal mud that in a kind of can effectively can realization, coal intergrowth is more, floating tail-coal coarse grain is fed the sorting of coarse slime system, is dissociated by middle product of coal ore grinding; To solve in routine after coal mill thin sludge-polluted serious problems in flotation by strengthening of sizing mixing simultaneously, provide a kind of low cost, technique is simple, small investment, the efficiency of separation are high, the high grey difficult separation coal bricklayer's process of the significant sorting of business efficiency.
The present invention adopts following technical scheme:
In particulate of the present invention coal dissociate-independently size mixing-bulk flotation technique is as follows:
A, separation of coarse slime operation: by floating tail-coal coarse grain and coarse slime, granularity 2-0.25mm, feed spiral in the lump to carry out discharging high grey coarse grain spoil, light product feeds TBS separator and obtains coarse coal slurry, coal slime in thick, floating tail-coal coarse grain is fed separation of coarse slime system to reclaim the unrenewable low grey coarse grain of flotation, discharge the high grey spoil of coarse grain simultaneously, by coal slime in thick after throwing tail and plug after dewatering ore grinding dissociate, avoid energy charge that low ash and height ash coarse grain ore grinding are brought and the adverse effect to flotation, reduce the thin mud amount of height ash that coal-grinding produces,
B, flotation operation of sizing mixing: to dissociate the different different requirements to energy input of sizing mixing of granularity of ore pulp according to entering float coal mud ore pulp and middle coal, when will enter float coal mud by fully ensureing to size mixing, the m-time of sizing mixing is not less than 4min, to guarantee the abundant absorption of flotation collector on coal grain surface; Middle colliery slurry feeds in multistage action of forced stirring size mixing equipment, agitator arm linear velocity is not less than 6m/s, make to dissociate particulate and flotation collector fully disperses in size mixing equipment, realize effective absorption of coal and collecting agent in particulate, the float coal mud that enters after sizing mixing in advance feeds flotation device in the lump carry out sorting to simplify flotation flowsheet with the middle coal that dissociates.
In particulate of the present invention coal dissociate-independently size mixing-concrete grammar of bulk flotation technique is as follows:
(1) to size mixing operation:
To enter float coal mud to join single hop impeller and to size mixing agitator, the time of sizing mixing is not less than 4min, to guarantee the abundant absorption of flotation collector on coal grain surface; Middle colliery slurry adds in multistage action of forced stirring size mixing equipment, and under high strength sizes mixing condition, agitator arm linear velocity is not less than 6m/s;
(2) operation is roughly selected:
The float coal mud that enters after sizing mixing in advance to be dissociated after particulate ore pulp is mixed by pipeline with middle coal and is given in flotation device, after flotation device sorting, obtains floatation clean coal and floating tail-coal;
(3) dehydration and selected operation:
The gravity flow of flotation device floatation clean coal enters screen bowl centrifuge and dewaters, reclaim wherein low grey coarse grain cleaned coal, Centrifuge filtrate enters sorting in selected floatation equipment-flotation column and obtains cleaned coal and tail coal, by the thin mud of selected minimizing to the pollution of cleaned coal, cleaned coal ore pulp after selected and tail coal all enter follow-up processed, obtain tail coal mud;
(4) sorting and desliming operation:
Roughly select tail coal and carry out thickening respectively through classifying cyclone and desliming screen, classifying cyclone overflow enters follow-up processed with desliming screen backwater together with selected tail coal, obtains tail coal mud, and tail coal coarse grain feeds TBS sorting;
(5) separation of coarse slime operation:
Tail coal coarse grain after desliming screen desliming dehydration and gravity treatment coarse slime, gravity treatment coarse slime granularity 2-0.25mm, feeds spiral sorting in the lump, and the light product of spiral feeds TBS separator, obtains spoil, thick middle coal slime and coarse coal slurry; As product after coarse coal slurry and the further processed of spoil, after in thick, coal slime enters desliming operation, ore grinding dissociates;
(6) desliming operation:
The thick middle coal slime that TBS sub-elects enters sieve bend and carries out desliming dehydration, and oversize enters grinding machine and dissociates, and returns flotation operation of sizing mixing together with backwater merges with particulate after mill;
(7) grinding operation:
Thick middle coal slime after dehydration desliming enters grinding in coal pulverizer and dissociates, grinding machine can adjust rotating speed (working speed is the 65%-85% of critical speed) according to pan feeding character and granularity requirements of dissociating, after mill, in product ,-0.074mm part accounts for 40-50%, and the middle coal pumping after dissociating is back to middle coal size mixing equipment and sizes mixing.
In step (1), enter float coal mud and middle coal ore grinding coal slime when carrying out sizing mixing operation, add diesel oil or kerosene as flotation collector, consumption is 100-300g/t.Ensure that into floating pulp density be 60-80g/L by adding the water yield.
In step (3), dehydration and selected operation adjust according to cleans ash, then do not need selected link of dewatering when flotation device floatation clean coal is qualified.
Good effect of the present invention is as follows:
The present invention is the coal slime floating process dissociated based on middle coal ore grinding.Float to roughly selecting the row coarse grain recovery that progresses greatly, particulate is selected to reduce thin sludge-polluted; Roughly select tail coal coarse grain gravity treatment together with coarse slime after concentrated classification and realize " plug " and " throwing tail ", roughly select the high grey particulate of tail coal directly as tail coal.Dissociate coal slime in gravity treatment ore grinding, and the pulverizing avoiding coarse grain spoil in floating tail-coal and low grey coarse grain causes adverse effect to flotation.In simultaneously granularity is thin, coal coal slime of dissociating is sized mixing separately, mates and to size mixing rotating speed effect with high-energy input strengthening, and the balance reaching desorption probability and collision probability is selective with what strengthen that particulate and medicament adsorb; The floatation feed of coarse grain fully ensures that under certain speed conditions of sizing mixing the time of sizing mixing strengthens it to medicament suction-operated to improve the rate of recovery of coarse grain, in first Application coal ore grinding dissociate size mixing separately-bulk flotation technique realizes the efficient separation of the grey difficult separation coal mud of the more height of centering coal intergrowth content.
Major advantage has:
A, the sorting together with coarse slime of tail coal coarse grain will be roughly selected, in gravity treatment, coal grinding is dissociated, the unrenewable coarse grain of flotation can be reclaimed by gravity treatment, discharge the high grey spoil of coarse grain, solving the energy charge that runs and to also avoid while thick problem and bring low ash and height ash coarse grain ore grinding and the adverse effect to flotation, reduce the height ash carefully mud amount produced without differential grinding.
B, require to be provided with cleaned coal ring selection joint again according to cleans ash, reclaim low grey coarse grain by after the dehydration of roughly selecting cleaned coal screen bowl centrifuge, filtrate flotation column is selected to reduce the pollution of thin mud to cleaned coal.
C, for entering float coal mud from the different of the slime size after middle coal ore grinding and different requirements that are that input energy of sizing mixing, to mate with different stirring size mixing equipments.Coarse grain ore pulp feeds single hop impeller and to size mixing agitator, fully ensures to size mixing the time to guarantee the abundant absorption of flotation collector at particle surface; Particulate ore pulp feeds in multistage action of forced stirring size mixing equipment, and this equipment is provided with three layers of agitator arm and speed of agitator is high, and particulate ore pulp and flotation collector are fully disperseed in size mixing equipment, realizes effective absorption of fine slime and collecting agent.Improve medicament quality of adsorption by the strengthening of the process of sizing mixing, increase the rate of recovery of coarse grain and the selective of particulate.
D, this technological process are simple, small investment, and power consumption is little, and operating cost is low, and compare with traditional floatation process, the efficiency of separation is high, remarkable in economical benefits.
Accompanying drawing explanation
Fig. 1 is sorting process FB(flow block) of the present invention.
Fig. 2 is that in particulate of the present invention, coal dissociates-independently size mixing-the installation drawing of bulk flotation technique.
In figure: A pan feeding is sized mixing agitator, in B, coal is sized mixing agitator, C flotation device, D tail coal Buffer Pool, E concentrate baffle-box, F classification pan feeding pump, G screen-bowl centrifuge, H flotation column, I bubble generator, J circulating pump, K classifying cyclone, L high-frequency screen, M spiral, NTBS separator, O sieve bend, P ball mill, coal Buffer Pool in Q, coal pan feeding pump in R, the floatation feed ore pulp that 1 granularity is thicker, 2 recirculated waters, 3 medicaments, 4 size mixing after thickness grain slurry mixture, 5 floatation clean coals, 6 floating tail-coals, 7 cyclone overflows, 8 cyclone underflows, 9 high-frequency screen oversizes, 10 high-frequency screen backwaters, 11 coarse slimes, 12 light products, 13 coarse grain spoils, 14 coarse coal slurries, 15 thick middle coal slimes, 16 sieve bend screenings, 17 sieve bend oversizes, 18 filtrates, 19 low grey coarse grain cleaned coal, 20 selected cleaned coal ore pulps, 21 selected tail coals, 22 final head coal products, 23 final tail coals.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are further described:
Example: as shown in Figure 1, in particulate of the present invention, coal dissociates-independently sizes mixing-bulk flotation technique, to dissociate the different different requirements to energy input of sizing mixing of pulp granularity according to entering float coal mud ore pulp and middle coal, float coal mud will be entered feed single hop impeller and to size mixing agitator, and fully ensure to size mixing the time (time of sizing mixing is not less than 4min) to guarantee the abundant absorption of flotation collector on coal grain surface; Middle colliery slurry feeds in multistage action of forced stirring size mixing equipment, this equipment is provided with three layers of agitator arm and speed of agitator high (agitator arm linear velocity is not less than 6m/s), make to dissociate particulate and flotation collector fully disperses in size mixing equipment, realize effective absorption of fine slime and collecting agent, when sizing mixing, suitable recirculated water should be added according to concentration requirement.The float coal mud that enters after sizing mixing in advance to be dissociated after particulate is mixed by pipeline with middle coal and is given in flotation device, after flotation device sorting, obtains floatation clean coal and floating tail-coal.When cleans ash exceeds standard, flotation device flotation concentrate is fed screen bowl centrifuge and dewaters, reclaim low grey coarse grain cleaned coal wherein; Centrifuge filtrate then feeds sorting in selected floatation equipment (flotation column) and obtains cleaned coal and tail coal, cleaned coal ore pulp after selected and tail coal all enter follow-up processed, this operation can adjust according to cleans ash, then can not need selected link of dewatering when flotation device floatation clean coal is qualified.Roughly select tail coal and carry out thickening through classifying cyclone and desliming screen, classifying cyclone overflow enters follow-up processed with desliming screen backwater together with selected tail coal, tail coal coarse grain after desliming screen desliming dehydration and gravity treatment coarse slime (granularity 2-0.25mm) feed spiral sorting in the lump, the light product of spiral feeds TBS separator, obtains spoil, thick middle coal slime and coarse coal slurry.Coarse coal slurry and spoil enter further processed as product, the thick middle coal slime that TBS sub-elects enters sieve bend and carries out desliming dehydration, arc oversize to enter in coal pulverizer grinding and dissociates, backwater with dissociate after middle coal return and be pumped to particulate size mixing equipment and size mixing.In particulate coal independently size mixing-bulk flotation technique compared to the bulk flotation of routine, under identical medicine consumption condition, clean coal yield 0.5% can be improved, reduce cleans ash 1.5%.
As shown in Figure 2, of the present inventionly independently to size mixing-bulk flotation technique capital equipment comprises size mixing agitator A, middle coal of pan feeding and to size mixing agitator B, flotation device C, tail coal Buffer Pool D, concentrate baffle-box E, classification pan feeding pump F, screen-bowl centrifuge G, flotation column H, bubble generator I, circulating pump J, classifying cyclone K, high-frequency screen L, spiral M, TBS separator N, sieve bend O, ball mill P, middle coal Buffer Pool Q, middle coal pan feeding pump R.The thicker floatation feed ore pulp 1 of granularity is sized mixing in agitator A at coarse grain individual layer impeller, adds a certain amount of medicament 3 and fully ensures to size mixing under the time of sizing mixing under certain speed of agitator; Particulate ore pulp 17 after chats dissociates is pumped in multistage action of forced stirring size mixing equipment B, and add under a certain amount of medicament 3 ensures high rotating speed input of sizing mixing under the time of necessarily sizing mixing and make particulate ore pulp and medicament fully disperse to size mixing, the process of sizing mixing can be added recirculated water 2 and be sized mixing and the concentration requirement of floatation process with satisfied.Feed in flotation device C after thickness grain ore pulp 1,17 after sizing mixing is mixed by pipeline and carry out sorting, obtain floatation clean coal 5 and floating tail-coal 6, respectively from flowing to concentrate baffle-box E and tail coal Buffer Pool D.Floatation clean coal 5 feeds in screen-bowl centrifuge G and reclaims low grey coarse grain cleaned coal 19, and filtrate 18 feeds the selected selected cleaned coal ore pulp 20 that obtains in flotation column H and enters follow-up processed with selected tail coal 21; When flotation device C cleans ash is up to standard then without the need to dewatering to cleaned coal, selected operation, now concentrate 5 directly as final floatation clean coal to postorder process.Tail coal ore pulp 6 is pumped in classifying cyclone K and carries out classification after buffering, and underflow 8 enters high-frequency screen L and carries out desliming dehydration, and cyclone overflow 7 and backwater 10 enter subsequent job as tail coal.High-frequency screen oversize 9 and coarse slime 11 enter spiral M and carry out sorting, obtain light product 12 and coarse grain spoil 13, and light product feeds TBS separator N sorting further and obtains coarse coal slurry 14 and thick middle coal slime 15.In thick coal slime 15 enter sieve bend O dewater after oversize 17 feed coal pulverizer O and carry out grinding and dissociate, screenings 16 and after dissociating in particulate coal mixed ore pulp 18 after Buffer Pool P cushion, be pumped to multistage action of forced stirring size mixing equipment B size mixing.
Although illustrate and describe embodiments of the invention, for the ordinary skill in the art, be appreciated that and can carry out multiple change, amendment, replacement and modification to these embodiments without departing from the principles and spirit of the present invention, scope of the present invention is by claims and equivalents thereof.
Claims (4)
1. in particulate, coal dissociates-independently sizes mixing-bulk flotation a technique, it is characterized in that:
A, separation of coarse slime operation: by floating tail-coal coarse grain and coarse slime, granularity 2-0.25mm, feed spiral in the lump to carry out discharging high grey coarse grain spoil, light product feeds TBS separator and obtains coarse coal slurry, coal slime in thick, floating tail-coal coarse grain is fed separation of coarse slime system to reclaim the unrenewable low grey coarse grain of flotation, discharge the high grey spoil of coarse grain simultaneously, by coal slime in thick after throwing tail and plug after dewatering ore grinding dissociate, avoid energy charge that low ash and height ash coarse grain ore grinding are brought and the adverse effect to flotation, reduce the thin mud amount of height ash that coal-grinding produces,
B, flotation operation of sizing mixing: to dissociate the different different requirements to energy input of sizing mixing of granularity of ore pulp according to entering float coal mud ore pulp and middle coal, when will enter float coal mud by fully ensureing to size mixing, the m-time of sizing mixing is not less than 4min, to guarantee the abundant absorption of flotation collector on coal grain surface; Middle colliery slurry feeds in multistage action of forced stirring size mixing equipment, agitator arm linear velocity is not less than 6m/s, make to dissociate particulate and flotation collector fully disperses in size mixing equipment, realize effective absorption of coal and collecting agent in particulate, the float coal mud that enters after sizing mixing in advance feeds flotation device in the lump carry out sorting to simplify flotation flowsheet with the middle coal that dissociates.
2. in particulate as claimed in claim 1, coal dissociates-independently sizes mixing-bulk flotation technique, it is characterized in that: the concrete grammar of described technique is as follows:
(1) to size mixing operation:
To enter float coal mud to join single hop impeller and to size mixing agitator, the time of sizing mixing is not less than 4min, to guarantee the abundant absorption of flotation collector on coal grain surface; Middle colliery slurry adds in multistage action of forced stirring size mixing equipment, and under high strength sizes mixing condition, agitator arm linear velocity is not less than 6m/s;
(2) operation is roughly selected:
The float coal mud that enters after sizing mixing in advance to be dissociated after particulate ore pulp is mixed by pipeline with middle coal and is given in flotation device, after flotation device sorting, obtains floatation clean coal and floating tail-coal;
(3) dehydration and selected operation:
The gravity flow of flotation device floatation clean coal enters screen bowl centrifuge and dewaters, reclaim wherein low grey coarse grain cleaned coal, Centrifuge filtrate enters sorting in selected floatation equipment-flotation column and obtains cleaned coal and tail coal, by the thin mud of selected minimizing to the pollution of cleaned coal, cleaned coal ore pulp after selected and tail coal all enter follow-up processed, obtain tail coal mud;
(4) sorting and desliming operation:
Roughly select tail coal and carry out thickening respectively through classifying cyclone and desliming screen, classifying cyclone overflow enters follow-up processed with desliming screen backwater together with selected tail coal, obtains tail coal mud, and tail coal coarse grain feeds TBS sorting;
(5) separation of coarse slime operation:
Tail coal coarse grain after desliming screen desliming dehydration and gravity treatment coarse slime, gravity treatment coarse slime granularity 2-0.25mm, feeds spiral sorting in the lump, and the light product of spiral feeds TBS separator, obtains spoil, thick middle coal slime and coarse coal slurry; As product after coarse coal slurry and the further processed of spoil, after in thick, coal slime enters desliming operation, ore grinding dissociates;
(6) desliming operation:
The thick middle coal slime that TBS sub-elects enters sieve bend and carries out desliming dehydration, and oversize enters grinding machine and dissociates, and returns flotation operation of sizing mixing together with backwater merges with particulate after mill;
(7) grinding operation:
Thick middle coal slime after dehydration desliming enters grinding in coal pulverizer and dissociates, and working speed is the 65%-85% of critical speed, and after mill, in product ,-0.074mm part accounts for 40-50%, and the middle coal pumping after dissociating is back to middle coal size mixing equipment and sizes mixing.
3. in particulate as claimed in claim 2, coal dissociates-independently sizes mixing-bulk flotation technique, it is characterized in that: in step (1), enter float coal mud and middle coal ore grinding coal slime when carrying out sizing mixing operation, add diesel oil or kerosene as flotation collector, consumption is 100-300g/t, ensures that into floating pulp density be 60-80g/L by adding the water yield.
4. in particulate as claimed in claim 2, coal dissociates-independently sizes mixing-bulk flotation technique, it is characterized in that: in step (3), dehydration and selected operation adjust according to cleans ash, then do not need selected link of dewatering when flotation device floatation clean coal is qualified.
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| CN105080701A (en) * | 2015-09-02 | 2015-11-25 | 中国矿业大学 | Separation method for roughing slime through teetered bed separator (TBS) and concentrating coarse slime difficult to separate through slime dense medium cyclone |
| CN105728180A (en) * | 2016-03-22 | 2016-07-06 | 中国矿业大学 | Treating recycling technology of low-ash coking floatation tailings |
| CN106311458A (en) * | 2016-10-10 | 2017-01-11 | 神华集团有限责任公司 | Teeter bed separator (TBS) tailing separation system and separation method |
| CN106669957A (en) * | 2016-06-20 | 2017-05-17 | 中国矿业大学 | Flotation technology for fine-grain middling coal |
| CN106669961A (en) * | 2016-06-20 | 2017-05-17 | 中国矿业大学 | Process for recycling fine coal from middlings |
| CN106944240A (en) * | 2017-02-21 | 2017-07-14 | 天津美腾科技有限公司 | The implementation method and device of a kind of thickening flotation technique of black water half |
| CN108745623A (en) * | 2018-05-28 | 2018-11-06 | 湖南兴辉洗选药剂科技开发有限公司 | A kind of coke rich coal slime separation system and method for separating |
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| CN110038709A (en) * | 2019-04-28 | 2019-07-23 | 中国矿业大学 | A kind of slime water treatment technique |
| CN110947524A (en) * | 2019-12-11 | 2020-04-03 | 乌海市广纳洗煤有限公司 | Coal washing and sorting method |
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| CN109092550A (en) * | 2018-08-31 | 2018-12-28 | 陕西陕煤黄陵矿业有限公司 | A kind of coarse-fine coal centrifugate recovery system and its recovery method |
| CN110038709A (en) * | 2019-04-28 | 2019-07-23 | 中国矿业大学 | A kind of slime water treatment technique |
| CN110947524A (en) * | 2019-12-11 | 2020-04-03 | 乌海市广纳洗煤有限公司 | Coal washing and sorting method |
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