CN110293005B - Liquid-solid composite collecting agent for coal slime flotation and preparation method thereof - Google Patents
Liquid-solid composite collecting agent for coal slime flotation and preparation method thereof Download PDFInfo
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- CN110293005B CN110293005B CN201910634007.1A CN201910634007A CN110293005B CN 110293005 B CN110293005 B CN 110293005B CN 201910634007 A CN201910634007 A CN 201910634007A CN 110293005 B CN110293005 B CN 110293005B
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- 239000003245 coal Substances 0.000 title claims abstract description 170
- 238000005188 flotation Methods 0.000 title claims abstract description 78
- 239000002131 composite material Substances 0.000 title claims abstract description 36
- 239000007787 solid Substances 0.000 title claims abstract description 35
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title abstract description 6
- 239000002245 particle Substances 0.000 claims abstract description 42
- 239000007788 liquid Substances 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 14
- 230000000694 effects Effects 0.000 claims abstract description 10
- SNRUBQQJIBEYMU-UHFFFAOYSA-N dodecane Chemical compound CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 claims description 8
- 229940094933 n-dodecane Drugs 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 239000003350 kerosene Substances 0.000 claims description 6
- 239000002283 diesel fuel Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 238000011084 recovery Methods 0.000 abstract description 3
- 239000000047 product Substances 0.000 description 79
- 239000002802 bituminous coal Substances 0.000 description 24
- 230000001105 regulatory effect Effects 0.000 description 24
- 239000002002 slurry Substances 0.000 description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 17
- 238000005303 weighing Methods 0.000 description 16
- 230000000052 comparative effect Effects 0.000 description 10
- 239000000203 mixture Substances 0.000 description 9
- 238000012360 testing method Methods 0.000 description 9
- 238000001035 drying Methods 0.000 description 8
- 238000001914 filtration Methods 0.000 description 8
- 239000006260 foam Substances 0.000 description 8
- 239000004088 foaming agent Substances 0.000 description 8
- SJWFXCIHNDVPSH-UHFFFAOYSA-N octan-2-ol Chemical compound CCCCCCC(C)O SJWFXCIHNDVPSH-UHFFFAOYSA-N 0.000 description 8
- 239000002994 raw material Substances 0.000 description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000003921 oil Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000006227 byproduct Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- IUVCFHHAEHNCFT-INIZCTEOSA-N 2-[(1s)-1-[4-amino-3-(3-fluoro-4-propan-2-yloxyphenyl)pyrazolo[3,4-d]pyrimidin-1-yl]ethyl]-6-fluoro-3-(3-fluorophenyl)chromen-4-one Chemical compound C1=C(F)C(OC(C)C)=CC=C1C(C1=C(N)N=CN=C11)=NN1[C@@H](C)C1=C(C=2C=C(F)C=CC=2)C(=O)C2=CC(F)=CC=C2O1 IUVCFHHAEHNCFT-INIZCTEOSA-N 0.000 description 1
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- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003250 coal slurry Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
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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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/004—Organic compounds
- B03D1/006—Hydrocarbons
-
- 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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/02—Froth-flotation processes
-
- 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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/14—Flotation machines
- B03D1/16—Flotation machines with impellers; Subaeration machines
-
- 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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/02—Collectors
-
- 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
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2203/00—Specified materials treated by the flotation agents; Specified applications
- B03D2203/02—Ores
- B03D2203/04—Non-sulfide ores
- B03D2203/08—Coal ores, fly ash or soot
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biotechnology (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention discloses a liquid-solid composite collector for coal slime flotation and a preparation method thereof. According to the mass percentage, the superfine coal-based particles are 0.5-5 percent, and the liquid collecting agent is 90-99.5 percent. The ultrafine coal-based particles with strong floatability in the liquid-solid composite collector can be adsorbed on the surface of the floated coal particles in the flotation process, so that the hydrophobicity of the surface of the floated coal particles is improved, the adhesion efficiency between the coal particles and bubbles can be improved, and the coal slime flotation effect is effectively improved. The liquid-solid composite collecting agent has low cost and good effect, can better improve the coal slime flotation efficiency and improve the recovery rate of clean coal products.
Description
Technical Field
The invention belongs to the technical field of flotation reagents, and particularly relates to a liquid-solid composite collecting agent for coal slime flotation and a preparation method thereof.
Background
Coal occupies an important position as the basic energy of China, and the national economic development and the industrial progress cannot leave the basic energy in the current situation. Coal makes a great contribution to the social meaning construction of China, but in the processing and use of coal, most coal resources have the phenomena of insufficient utilization, low conversion efficiency and serious resource waste, and in order to solve the problems, the coal is further processed at present, the utilization efficiency of the coal is improved, and high-quality coal resources are manufactured; the ultra-pure coal belongs to novel coal resources with high added values, can be used for preparing products such as activated carbon, oil-water coal slurry and the like, and has certain market development prospect.
The coal slime separation generally adopts means such as gravity separation, flotation, and flotation is one of effective methods for separating the coal slime, and is often used in the actual operation process. The flotation of coal slime generally adopts hydrocarbon oil for flotation, and the flotation effect is improved by enhancing the hydrophobicity of the surface of coal particles. The ultrafine coal particles with strong floatability can be adsorbed on the surface of the floated coal particles in the flotation process, so that the hydrophobicity of the surface of the floated coal particles is improved, the adhesion efficiency between the coal particles and bubbles can be improved, and the coal slime flotation effect is effectively improved. The composite collecting agent has low cost and good effect, can better improve the coal slime flotation efficiency and improve the recovery rate of clean coal products. The coal is ground into superfine particles in a grinding mode, and the superfine coal particles are added into the kerosene or chemical derivatives to form a liquid-solid composite collector, so that the flotation efficiency can be obviously improved, and the coal slime flotation is referred to a certain extent.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a liquid-solid composite collector for coal slime flotation and a preparation method thereof.
In order to achieve the purpose, the invention adopts the technical scheme that:
the liquid-solid composite collector for coal slime flotation is characterized by being formed by mixing superfine coal-based particles and a liquid collector.
Preferably, the liquid-solid composite collector comprises the following components in percentage by mass: 95-99.5% of liquid collecting agent and 0.5-5% of superfine clean coal particles.
Preferably, the liquid collector is kerosene, diesel oil, fuel oil, natural gas condensed oil or n-dodecane used for coal slime flotation.
Preferably, the ultra-fine coal-based particles are highly floatable.
Preferably, the ultra-fine coal-based particles are ultra-pure coal, low ash clean coal particles, carbon powder, or a low ash carbon component extracted from clean coal.
Preferably, the ultra-fine coal-based particles have a size fraction of less than 1 micron.
A preparation method of a liquid-solid composite collector for coal slime flotation comprises the steps of adding superfine coal-based particles into a liquid collector after grinding, and uniformly mixing to obtain the liquid-solid composite collector.
Compared with the prior art, the invention has the following beneficial effects:
in the liquid-solid composite collecting agent, superfine clean coal particles with low ash content are added into kerosene, diesel oil or chemical byproducts, so that the aim of optimizing the collecting agent is fulfilled, and the effect of the liquid-solid composite collecting agent is obviously superior to that of the kerosene, diesel oil or chemical byproducts which are used independently; under the same conditions, the froth-enriched minerals using the liquid-solid composite collector are much higher than those using the alkane agent alone. The ultrafine coal particles with strong floatability in the liquid-solid composite collector can be adsorbed on the surface of the floated coal particles in the flotation process, so that the hydrophobicity of the surface of the floated coal particles is improved, the adhesion efficiency between the coal particles and bubbles can be improved, and the flotation effect of coal slime is effectively improved. The liquid-solid composite collecting agent has low cost and good effect, can better improve the coal slime flotation efficiency and improve the recovery rate of clean coal products.
Drawings
Figure 1 is a graph showing the results of two different collector tests of the present invention.
Detailed Description
The present invention will be further described with reference to the following examples.
Example A1
The liquid-solid composite collector is prepared by taking 98% of n-dodecane and 2% of ultra-fine particles (the particle size is less than 1 micron) of ultra-pure coal according to mass percentage, adding the ultra-fine coal particles into the n-dodecane, and uniformly mixing the mixture of the ultra-fine coal particles and a conventional collector.
The resulting liquid-solid composite collector was used in examples B1-B4.
Example A2
The liquid-solid composite collector comprises the following components in percentage by mass: 95% of kerosene and 5% of low-ash clean coal particles (the particle size is less than 1 micron).
Example A3
The liquid-solid composite collector comprises the following components in percentage by mass: 99.5% diesel oil and 0.5% low ash fraction (particle size fraction less than 1 micron) extracted from clean coal.
Example A4
The liquid-solid composite collector comprises the following components in percentage by mass: 99% of fuel oil and 1% of low ash fraction (particle size less than 1 micron) extracted from clean coal.
Example A5
The liquid-solid composite collector comprises the following components in percentage by mass: 98.5% of natural gas condensed oil and 1.5% of low ash component (the particle size is less than 1 micron) extracted from clean coal.
Example B1
A first-stage flotation process is adopted, a 0.5L self-suction small flotation machine is selected in a coal slime flotation test, the rotating speed of an impeller is controlled at 1700r/min, the concentration of ore pulp is about 70g/L, and the ore pulp is in a form of liquid mixture formed by adding water into raw materials of bituminous coal. Firstly, opening a flotation machine, weighing 35g of bituminous coal by using an electronic scale, putting the bituminous coal into a flotation tank, adding 0.5L of water into the flotation tank, regulating the slurry for 2min, adding the liquid-solid composite collecting agent with the dosage of 100g/t and the slurry regulating time of 2min, and adding the foaming agent sec-octanol with the dosage of 80g/t and the slurry regulating time of 30 s. And then opening an inflation valve, starting to scrape bubbles for 2min, wherein the foam is enriched by clean coal products, and the products which do not float up are tail coal products and mainly comprise gangue and the like. And then filtering out clean coal products and tail coal products respectively, drying and weighing the clean coal products and the tail coal products, taking 1g of coal samples in the dried and weighed clean coal products, putting the coal samples into a muffle furnace to burn slow ash, and calculating the yield and the ash content of the clean coal products.
Comparative example B1
A first-stage flotation process is adopted, a 0.5L self-suction small flotation machine is selected in a coal slime flotation test, the rotating speed of an impeller is controlled at 1700r/min, the concentration of ore pulp is about 70g/L, and the ore pulp is in a form of liquid mixture formed by adding water into raw materials of bituminous coal. Firstly, opening a flotation machine, weighing 35g of bituminous coal by using an electronic scale, putting the bituminous coal into a flotation tank, adding 0.5L of water into the flotation tank, regulating the slurry for 2min, adding a collecting agent n-dodecane with the dosage of 100g/t and the slurry regulating time of 2min, adding a foaming agent sec-octanol with the dosage of 80g/t, and regulating the slurry for 30 s. And then opening an inflation valve, starting to scrape bubbles for 2min, wherein the foam is enriched by clean coal products, and the products which do not float up are tail coal products and mainly comprise gangue and the like. And then filtering out clean coal products and tail coal products respectively, drying and weighing the clean coal products and the tail coal products, taking 1g of coal samples in the dried and weighed clean coal products, putting the coal samples into a muffle furnace to burn slow ash, and calculating the yield and the ash content of the clean coal products.
Example B2
A first-stage flotation process is adopted, a 0.5L self-suction small flotation machine is selected in a coal slime flotation test, the rotating speed of an impeller is controlled at 1700r/min, the concentration of ore pulp is about 70g/L, and the ore pulp is in a form of liquid mixture formed by adding water into raw materials of bituminous coal. Firstly, opening a flotation machine, weighing 35g of bituminous coal by using an electronic scale, putting the bituminous coal into a flotation tank, adding 0.5L of water into the flotation tank, regulating the slurry for 2min, adding the liquid-solid composite collecting agent with the dosage of 150g/t, regulating the slurry for 2min, adding the foaming agent sec-octanol with the dosage of 80g/t, and regulating the slurry for 30 s. And then opening an inflation valve, starting to scrape bubbles for 2min, wherein the foam is enriched by clean coal products, and the products which do not float up are tail coal products and mainly comprise gangue and the like. And then filtering out clean coal products and tail coal products respectively, drying and weighing the clean coal products and the tail coal products, taking 1g of coal samples in the dried and weighed clean coal products, putting the coal samples into a muffle furnace to burn slow ash, and calculating the yield and the ash content of the clean coal products.
Comparative example B2
A first-stage flotation process is adopted, a 0.5L self-suction small flotation machine is selected in a coal slime flotation test, the rotating speed of an impeller is controlled at 1700r/min, the concentration of ore pulp is about 70g/L, and the ore pulp is in a form of liquid mixture formed by adding water into raw materials of bituminous coal. Firstly, opening a flotation machine, weighing 35g of bituminous coal by using an electronic scale, putting the bituminous coal into a flotation tank, adding 0.5L of water into the flotation tank, regulating the slurry for 2min, adding collecting agent n-dodecane with the dosage of 150g/t and the slurry regulating time of 2min, adding foaming agent sec-octanol with the dosage of 80g/t, and regulating the slurry for 30 s. And then opening an inflation valve, starting to scrape bubbles for 2min, wherein the foam is enriched by clean coal products, and the products which do not float up are tail coal products and mainly comprise gangue and the like. And then filtering out clean coal products and tail coal products respectively, drying and weighing the clean coal products and the tail coal products, taking 1g of coal samples in the dried and weighed clean coal products, putting the coal samples into a muffle furnace to burn slow ash, and calculating the yield and the ash content of the clean coal products.
Example B3
A first-stage flotation process is adopted, a 0.5L self-suction small flotation machine is selected in a coal slime flotation test, the rotating speed of an impeller is controlled at 1700r/min, the concentration of ore pulp is about 70g/L, and the ore pulp is in a form of liquid mixture formed by adding water into raw materials of bituminous coal. Firstly, opening a flotation machine, weighing 35g of bituminous coal by using an electronic scale, putting the bituminous coal into a flotation tank, adding 0.5L of water into the flotation tank, regulating the slurry for 2min, adding the liquid-solid composite collecting agent with the dosage of 200g/t and the slurry regulating time of 2min, and adding the foaming agent sec-octanol with the dosage of 80g/t and the slurry regulating time of 30 s. And then opening an inflation valve, starting to scrape bubbles for 2min, wherein the foam is enriched by clean coal products, and the products which do not float up are tail coal products and mainly comprise gangue and the like. And then filtering out clean coal products and tail coal products respectively, drying and weighing the clean coal products and the tail coal products, taking 1g of coal samples in the dried and weighed clean coal products, putting the coal samples into a muffle furnace to burn slow ash, and calculating the yield and the ash content of the clean coal products.
Comparative example B3
A first-stage flotation process is adopted, a 0.5L self-suction small flotation machine is selected in a coal slime flotation test, the rotating speed of an impeller is controlled at 1700r/min, the concentration of ore pulp is about 70g/L, and the ore pulp is in a form of liquid mixture formed by adding water into raw materials of bituminous coal. Firstly, opening a flotation machine, weighing 35g of bituminous coal by using an electronic scale, putting the bituminous coal into a flotation tank, adding 0.5L of water into the flotation tank, regulating the slurry for 2min, adding a collecting agent n-dodecane with the dosage of 200g/t and the slurry regulating time of 2min, and adding a foaming agent sec-octanol with the dosage of 80g/t and the slurry regulating time of 30 s. And then opening an inflation valve, starting to scrape bubbles for 2min, wherein the foam is enriched by clean coal products, and the products which do not float up are tail coal products and mainly comprise gangue and the like. And then filtering out clean coal products and tail coal products respectively, drying and weighing the clean coal products and the tail coal products, taking 1g of coal samples in the dried and weighed clean coal products, putting the coal samples into a muffle furnace to burn slow ash, and calculating the yield and the ash content of the clean coal products.
Example B4
A first-stage flotation process is adopted, a 0.5L self-suction small flotation machine is selected in a coal slime flotation test, the rotating speed of an impeller is controlled at 1700r/min, the concentration of ore pulp is about 70g/L, and the ore pulp is in a form of liquid mixture formed by adding water into raw materials of bituminous coal. Firstly, opening a flotation machine, weighing 35g of bituminous coal by using an electronic scale, putting the bituminous coal into a flotation tank, adding 0.5L of water into the flotation tank, regulating the slurry for 2min, adding the liquid-solid composite collecting agent with the dosage of 250g/t and the slurry regulating time of 2min, and adding the foaming agent sec-octanol with the dosage of 80g/t and the slurry regulating time of 30 s. And then opening an inflation valve, starting to scrape bubbles for 2min, wherein the foam is enriched by clean coal products, and the products which do not float up are tail coal products and mainly comprise gangue and the like. And then filtering out clean coal products and tail coal products respectively, drying and weighing the clean coal products and the tail coal products, taking 1g of coal samples in the dried and weighed clean coal products, putting the coal samples into a muffle furnace to burn slow ash, and calculating the yield and the ash content of the clean coal products.
Comparative example B4
A first-stage flotation process is adopted, a 0.5L self-suction small flotation machine is selected in a coal slime flotation test, the rotating speed of an impeller is controlled at 1700r/min, the concentration of ore pulp is about 70g/L, and the ore pulp is in a form of liquid mixture formed by adding water into raw materials of bituminous coal. Firstly, opening a flotation machine, weighing 35g of bituminous coal by using an electronic scale, putting the bituminous coal into a flotation tank, adding 0.5L of water into the flotation tank, regulating the slurry for 2min, adding a collecting agent n-dodecane with the dosage of 250g/t and the slurry regulating time of 2min, adding a foaming agent sec-octanol with the dosage of 80g/t, and regulating the slurry for 30 s. And then opening an inflation valve, starting to scrape bubbles for 2min, wherein the foam is enriched by clean coal products, and the products which do not float up are tail coal products and mainly comprise gangue and the like. And then filtering out clean coal products and tail coal products respectively, drying and weighing the clean coal products and the tail coal products, taking about 1g of coal samples in the dried and weighed clean coal products, putting the coal samples into a muffle furnace to burn slow ash, and calculating the yield and the ash content of the clean coal products.
TABLE 1 yield and ash results for examples B1-B4 and comparative examples B1-B4
As shown in table 1 and fig. 1, the flotation effects of the liquid-solid composite collector provided by the present invention and the collector in the prior art were respectively adopted in the examples B1-B4 and the comparative examples B1-B4. The yields of the clean coal products obtained by using the liquid-solid composite collector provided by the invention in examples B1-B4 are 42.23%, 45.31%, 51.12% and 54.33% respectively, and the yields of the clean coal products obtained by using the collector in the prior art in comparative examples B1-B4 are 36.34%, 40.32%, 42.23% and 43.34% respectively, and the yields of examples B1-B4 are all higher than those of comparative examples B1-B4; the ash contents of the clean coal products obtained by adopting the liquid-solid composite collector provided by the invention in examples B1-B4 are respectively 8.57%, 9.21%, 10.43% and 10.89%, the ash contents of the clean coal products obtained by adopting the collector in the prior art in comparative examples B1-B4 are respectively 11.21%, 12.34%, 13.01% and 13.53%, and the ash contents of examples B1-B4 are all smaller than those of comparative examples B1-B4.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (1)
1. A liquid-solid composite collector for coal slime flotation is characterized in that the liquid-solid composite collector is formed by mixing superfine coal-based particles and a liquid collector; the liquid-solid composite collector comprises the following components in percentage by mass: 95% -99.5% of liquid collecting agent and 0.5% -5% of superfine coal-based particles;
the liquid collecting agent is kerosene, diesel oil or n-dodecane used for coal slime flotation;
the superfine coal-based particles are superfine coal, low-ash clean coal particles, carbon powder or a low-ash carbon component extracted from clean coal;
the size fraction of the superfine coal-based particles is less than 1 micron;
adding the superfine coal-based particles into the liquid collecting agent after grinding, and uniformly mixing to obtain a liquid-solid composite collecting agent; superfine coal particles in the liquid-solid composite collecting agent can be adsorbed on the surface of the floated coal particles in the flotation process, so that the hydrophobicity of the surface of the floated coal particles is improved, the adhesion efficiency between the coal particles and bubbles can be improved, and the coal slime flotation effect is effectively improved.
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| PCT/CN2020/098373 WO2021008324A1 (en) | 2019-07-15 | 2020-06-28 | Liquid-solid composite collector for coal slime flotation and preparation method therefor |
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| CN114289188B (en) * | 2021-12-24 | 2024-04-12 | 中国矿业大学 | Coal rock micro-component enrichment method based on charged micro-nano bubble flotation |
| CN114870999B (en) * | 2022-05-07 | 2023-06-27 | 南方科技大学 | Coal flotation reagent, preparation method thereof and coal flotation method |
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| US6799682B1 (en) * | 2000-05-16 | 2004-10-05 | Roe-Hoan Yoon | Method of increasing flotation rate |
| AU2000277457B2 (en) * | 2000-09-28 | 2006-08-31 | Roe-Hoan Yoon | Methods of enhancing fine particle dewatering |
| JP4346299B2 (en) * | 2002-10-25 | 2009-10-21 | 三井造船株式会社 | Pulverized coal flotation method, pulverized coal surface reformer, and pulverized coal flotation system |
| CN100548496C (en) * | 2007-03-02 | 2009-10-14 | 山西焦煤集团有限责任公司 | A kind of floatation method of difficult-to-float coal |
| CN105214853B (en) * | 2015-11-09 | 2017-08-25 | 中国矿业大学 | A kind of brown coal floatation method |
| CN105880031B (en) * | 2016-04-06 | 2018-08-07 | 武汉理工大学 | A kind of method of hydrophilic coal slime flotation |
| CN105964410B (en) * | 2016-05-28 | 2018-05-22 | 太原理工大学 | A kind of preparation method of coal slime flotation collector |
| CN106000657B (en) * | 2016-06-22 | 2018-10-30 | 太原理工大学 | A kind of coal slime flotation collector and preparation method thereof |
| CN107377228B (en) * | 2017-08-02 | 2020-04-17 | 太原理工大学 | Method for testing bubble particle adhesion collision behavior in coal slime flotation |
| CN108940602B (en) * | 2018-08-21 | 2020-04-24 | 中国矿业大学 | Collecting agent for flotation of weakly sticky coal slime and flotation method |
| CN109127148B (en) * | 2018-08-21 | 2020-03-27 | 中国矿业大学 | Long-flame coal slime flotation collector, preparation method thereof and long-flame coal slime flotation method |
| CN108855626B (en) * | 2018-08-23 | 2019-11-12 | 中国矿业大学 | Coal slime flotation collector containing nano particles and preparation method |
| CN109332004A (en) * | 2018-10-16 | 2019-02-15 | 山西工程技术学院 | A kind of microfine oxidation coal flotation process |
| CN110293005B (en) * | 2019-07-15 | 2022-02-22 | 中国矿业大学 | Liquid-solid composite collecting agent for coal slime flotation and preparation method thereof |
-
2019
- 2019-07-15 CN CN201910634007.1A patent/CN110293005B/en active Active
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2020
- 2020-06-28 WO PCT/CN2020/098373 patent/WO2021008324A1/en active Application Filing
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| CN110293005A (en) | 2019-10-01 |
| WO2021008324A1 (en) | 2021-01-21 |
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