CN102977641B - Method for preparing coal slime powder material - Google Patents
Method for preparing coal slime powder material Download PDFInfo
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- CN102977641B CN102977641B CN201210473134.6A CN201210473134A CN102977641B CN 102977641 B CN102977641 B CN 102977641B CN 201210473134 A CN201210473134 A CN 201210473134A CN 102977641 B CN102977641 B CN 102977641B
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Abstract
The invention discloses a method for preparing a coal slime powder material, which comprises the following steps of: A1, producing pulp and classifying; A2, carrying out fine grinding: feeding the pulp material from which the coarse materials are removed into a grinding machine, and implementing a fine treatment, wherein the rotating speed of the grinding machine is 500-1500rpm and grinding duration is 2-5 hours; A3, carrying out mechanical force chemical modification: after the fine grinding, filtering, preparing slurry which contains 20-60wt% of solid in a stirring barrel by taking ethanol as a dispersing medium, adding a surface modifier with the amount being 0.1-5% of that of coal slime in the pulp, and further stirring for 1-4 hours, wherein the surface modifier is one or more of a silane coupling agent, a titanate coupling agent, silicon oil or a fatty acid modifier; and A4, drying and dispersing to obtain the coal slime powder material. According to the method for preparing the coal slime powder material, by using the coal slime which is byproduct of coal as a raw material to prepare the powder material, not only the problems of land occupation and environmental pollution caused by stacking the coal slime are relieved but also comprehensive utilization of the coal slime resource is realized and the waste material is turned into a valuable material.
Description
Technical field
The present invention relates to coal resources comprehensive utilization and material technology field, in particular a kind of preparation method of coal slime powder body material.
Background technology
Coal slime is the waste in coal preparation process, is mainly made up of fine beans, efflorescence spoil and water.The features such as coal slime has fine size, retentiveness is strong, ash content is high, argillaceous mineral are many, its commodity value is low, utilizes difficulty large.Coal slime is met water and is run off, and air-dryly flies upward, and it is much bigger that the hazard ratio causing is both the coal gangue of washing waste.
China's coal slime annual emissions has reached more than 3,000 ten thousand tons at present.According to planning, China's raw coal enters to wash proportion will be increased year by year, add that mining mechanization degree improves, and the fine coal content in raw coal also can strengthen, and slime content will increase considerably when the time comes.Due to coal slime, to have granularity little, and retentiveness is strong, sulphur content, ash content, and the feature such as thermal value is low, causes coal slime to be difficult to efficiently utilize as fuel, only has a small amount of coal slime to be used as domestic fuel or mixes imitation frosted glass.In tens million of tons of coal slimes of the annual discharge of coal separating plant of China, more than 70% enter environment, not only wasted a large amount of coal resources, but also caused serious environmental pollution, and most of coal slime is piled up, land occupation, contaminate environment are also the wastes of resource simultaneously.Therefore, exploring the new way that coal slime is utilized, make coal slime can obtain efficient, clean utilization, is the problem being significant in coal resources processing and utilization.
Comprehensive utilization to coal slime at present, the novel burning that mainly concentrates on coal slime utilizes technology.Slime briquette technology, coal mud water slurry and construction coal slime power plant are three main method wherein.These methods have been alleviated to a certain extent coal slime and have been entered environmental problem and the wasting of resources that environment causes.But the burning utilization of coal slime generally needs special combustion equipment and technology, and the fixed carbon content of most of coal slime is low, sulphur content, ash content are high, and thermal value is low, should not serve as fuel utilization.Coal slime, as the filler of polymer product, can make coal slime utilized, and can reduce again the cost of polymer materials.Therefore, research, with the preparation of coal slime base functional powder and the application in polymer composites thereof, can provide new direction for the high-efficiency cleaning utilization of coal slime.
Summary of the invention
Technical problem to be solved by this invention is the preparation method that a kind of coal slime powder body material is provided for the deficiencies in the prior art.
Technical scheme of the present invention is as follows:
A preparation method for coal slime powder body material, comprises the following steps:
A1, slurrying classification, add water by raw material, prepares through mechanical stirring the ore pulp that concentration is 10-40wt%, and the pH value of ore pulp is adjusted to 6-10, squeezes into hydraulic classification swirler with pump, removes the coarse particles that particle diameter is greater than 0.5mm; Raw material adopts coal washery floating tail-coal ore pulp, floating tail-coal thickener underflow or slime filter cake;
A2, Ultrafine Grinding stripping, send the slurry after going slightly into disintegrating machine, carries out micronization; Disintegrating machine rotating speed 500-1500 rev/min, mill stripping time 2-5 hour;
A3, mechanical-chemical modification, after Ultrafine Grinding stripping, filter, and then uses ethanol as dispersion medium, prepares the slurries of solid content 20-60wt% in agitation vat, adds the surface-modifying agent of coal slime weight 0.1-5% in slurries to continue to stir 1-4 hour; Surface-modifying agent is by one or more composite the forming in silane coupling agent, titanate coupling agent, silicone oil or fatty acid modified dose;
A4, dry breaing up, by the slurries after modification, dry, then in homogenizer or grinding machine, to break up, the time is 3-15 minute; Finally make particle diameter d50≤2.5 micron, d90≤4.6 micron, the coal slime powder body material of contact angle θ >=110 degree.
The coal slime powder body material that the present invention is prepared, fine size, has larger contact angle, has good hydrophobicity and dispersiveness.The coal slime powder body material that the present invention is prepared, can be used as the additive of rubber, plastics, has and fills and strengthening action.Its application method is simple, in the time of the materials processing such as plastics, rubber, the coal slime powder of 5-60% is added, through melt blending, the two is mixed, and while not changing plastics or Rubber processing, original production technique and equipment.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.
Embodiment 1, gets 1Kg floating tail-coal ore pulp in agitation vat, and adopting densitometer to record pulp density is 16wt%, adds hydrochloric acid and sodium hydroxide to regulate the pH value to 7.0 of ore pulp, then stirs 500 revs/min.The slurries that are stirred are carried out to classification with hydrocyclone, remove the coarse particles that is greater than 0.5mm.Then, with planetary ball mill grinding 1 hour, filter filter cake is moved into agitation vat, add ethanol preparation solid content 20wt% slurries (containing coal slime 140g), add amido silicon oil 5g, continue mechanical stirring 1 hour, take out slurry, in loft drier, under 200 degree, dry, pulverize and obtain 2.4 microns of median sizes, the modification coal slime powder that contact angle 125 is spent through pulverizer.
Embodiment 2, gets 200g delivering dry coal slurry, adds 800 ml waters, and the slurries of preparation concentration 20wt%, add hydrochloric acid and sodium hydroxide to regulate plasm PH value to 8.5, stir 1000 revs/min.Then through hydroclone classification, remove the coarse particles that is greater than 0.5mm.Grind 2 hours with planetary ball mill again, filter filter cake is moved into agitation vat, add ethanol preparation solid content 40% slurries (containing coal slime 136g), add hydroxy silicon oil 2g, continue mechanical stirring 3 hours, filter-press dehydration, 150 degree are dried, and pulverize and make the modification coal slime powder that 2.1 microns of median sizes, contact angle 120 are spent.
Embodiment 3, gets 200g delivering dry coal slurry, adds, and 600 ml waters, the slurries of preparation concentration 25wt%, add hydrochloric acid and sodium hydroxide to regulate plasm PH value to 8.0, stir 1000 revs/min.Then through hydroclone classification, remove the coarse particles that is greater than 0.5mm.Grind 4 hours with planetary ball mill again, filter filter cake is moved into agitation vat, add ethanol preparation solid content 50% slurries (containing coal slime 120g), add methyl-silicone oil 4g to continue mechanical stirring 5 hours, 150 degree are dried, and pulverize and make the modification coal slime powder that 1.8 microns of median sizes, contact angle 145 are spent.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improvement and conversion all should belong to the protection domain of claims of the present invention.
Claims (1)
1. a preparation method for coal slime powder body material, is characterized in that, comprises the following steps:
A1, slurrying classification, add water by raw material, prepares through mechanical stirring the ore pulp that concentration is 10-40wt%, and the pH value of ore pulp is adjusted to 6-10, squeezes into hydraulic classification swirler with pump, removes the coarse particles that particle diameter is greater than 0.5mm; Raw material adopts coal washery floating tail-coal ore pulp, floating tail-coal thickener underflow or slime filter cake;
A2, Ultrafine Grinding stripping, send the slurry after going slightly into disintegrating machine, carries out micronization; Disintegrating machine rotating speed 500-1500 rev/min, mill stripping time 2-5 hour;
A3, mechanical-chemical modification, after Ultrafine Grinding stripping, filter, and then uses ethanol as dispersion medium, prepares the slurries of solid content 20-60wt% in agitation vat, adds the surface-modifying agent of coal slime weight 0.1-5% in slurries to continue to stir 1-4 hour; Surface-modifying agent is by one or more composite the forming in silane coupling agent, titanate coupling agent, silicone oil or fatty acid modified dose;
A4, dry breaing up, by the slurries after modification, dry, then in homogenizer or grinding machine, to break up, the time is 3-15 minute; Finally make particle diameter d
50≤ 2.5 microns, d
90≤ 4.6 microns, the coal slime powder body material of contact angle θ>=110 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210473134.6A CN102977641B (en) | 2012-11-09 | 2012-11-09 | Method for preparing coal slime powder material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210473134.6A CN102977641B (en) | 2012-11-09 | 2012-11-09 | Method for preparing coal slime powder material |
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| CN102977641A CN102977641A (en) | 2013-03-20 |
| CN102977641B true CN102977641B (en) | 2014-05-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106929114B (en) * | 2017-03-30 | 2019-07-09 | 陕西科技大学 | A kind of modified method for improving slurry performance in low-order coal surface |
| CN107138508A (en) * | 2017-06-06 | 2017-09-08 | 浙江工业大学温州科学技术研究院 | A kind of coal slime application technology as the second resource |
| CN108668833B (en) * | 2018-05-21 | 2020-10-16 | 甘宜山 | Clean utilization method of coal slime produced in coal mining process |
| CN109126647B (en) * | 2018-09-08 | 2020-11-03 | 特勃尔润滑技术(江苏)有限公司 | Preparation method of graphene oxide-sodium alginate gel spheres |
| CN109395872B (en) * | 2018-10-19 | 2021-03-19 | 西安科技大学 | Preparation method of hydrophobic molybdenum tailing powder |
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| BE564536A (en) * | 1957-02-05 | |||
| JP3060530B2 (en) * | 1990-11-26 | 2000-07-10 | 信越化学工業株式会社 | Surface treatment method of inorganic particles and thermosetting resin composition |
| JPH0551540A (en) * | 1991-08-27 | 1993-03-02 | Kawasaki Steel Corp | Treatment of boron nitride |
| CN1044258C (en) * | 1992-10-09 | 1999-07-21 | 聂秉元 | Coal slime hydrophobic powder and its production method and use method |
| CN1121098A (en) * | 1995-01-17 | 1996-04-24 | 魏晓军 | Method for production of silica white using industrial sludge |
| CN1482218A (en) * | 2003-04-18 | 2004-03-17 | 朱复东 | Solid coal water mixture |
| JP4925758B2 (en) * | 2006-07-28 | 2012-05-09 | 株式会社トクヤマデンタル | Method for producing surface-treated inorganic filler |
| JP2008101051A (en) * | 2006-10-17 | 2008-05-01 | Konica Minolta Holdings Inc | Surface treatment method of carbonate salt fine particle, and resin composition and film comprising fine particle |
| CN101665627B (en) * | 2008-09-02 | 2013-05-08 | 陈汇宏 | Method for preparing rubber-plastic compound |
| CN101492621A (en) * | 2008-12-02 | 2009-07-29 | 吴荣标 | Sewage sludge biomass coal liquid and producing process |
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