CN102977641A - Method for preparing coal slime powder material - Google Patents

Method for preparing coal slime powder material Download PDF

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Publication number
CN102977641A
CN102977641A CN2012104731346A CN201210473134A CN102977641A CN 102977641 A CN102977641 A CN 102977641A CN 2012104731346 A CN2012104731346 A CN 2012104731346A CN 201210473134 A CN201210473134 A CN 201210473134A CN 102977641 A CN102977641 A CN 102977641A
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China
Prior art keywords
coal slime
coal
powder
slime
grinding
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CN2012104731346A
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CN102977641B (en
Inventor
张乾
张玉德
汤其建
陆银平
张白梅
吴东方
陈俊涛
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Henan University of Technology
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Henan University of Technology
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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

A kind of preparation method of coal slime powder body material
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 the coal preparation process, mainly is comprised of fine beans, efflorescence spoil and water.The characteristics such as coal slime has fine size, retentiveness is strong, ash content is high, the argillaceous mineral are many, its commodity value is low, utilizes difficulty large.Coal slime is met water and is namely run off, and air-dryly namely flies upward, and it is much bigger that the hazard ratio that causes 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 the mining mechanization degree improves, and the fine coal content in the raw coal also can strengthen, and slime content will increase considerably when the time comes.Because to have granularity little for coal slime, retentiveness is strong, sulphur content, ash content, and the characteristics such as thermal value is low cause coal slime to be difficult to act as a fuel and efficiently utilize, and only have a small amount of coal slime to be used as domestic fuel or mix imitation frosted glass.Enter environment more than 70% in the tens million of tons of coal slimes of the annual discharging of China coal separating plant, 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 also are the wastes of resource simultaneously.Therefore, explore the new way that coal slime is utilized, the utilization that makes coal slime can obtain efficiently, clean is the problem that is significant in the coal resources processing and utilization.
To the comprehensive utilization of coal slime, the novel burning that mainly concentrates on coal slime utilizes technology at present.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 height, and thermal value is low, and utilization should not act as a fuel.Coal slime can make coal slime obtain utilizing as the filler of polymer product, can reduce again the cost of polymer materials.Therefore, research can provide a new direction for the high-efficiency cleaning utilization of coal slime with the preparation of coal slime base functional powder and the application in polymer composites thereof.
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 kind of preparation method of coal slime powder body material may further comprise the steps:
A1, slurrying classification add entry with raw material, prepare the ore pulp that concentration is 10-40wt% through mechanical stirring, and the pH value of ore pulp is adjusted to 6-10, squeeze into hydraulic classification swirler with pump, remove particle diameter greater than the coarse particles of 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 are sent the slurry after going slightly into disintegrating machine, carry out micronization; 500-1500 rev/min of disintegrating machine rotating speed, the 2-5 hour stripping time of mill;
A3, mechanical-chemical modification after the Ultrafine Grinding stripping, filter, and then use ethanol as dispersion medium, the slurries of preparation solid content 20-60wt% in agitation vat, and the surface-modifying agent that adds coal slime weight 0.1-5% in the slurries continues 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, drying are broken up, and with the slurries after the modification, then drying breaks up in homogenizer or grinding machine, and the time is 3-15 minute; Make at last 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 preferably 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, when the materials processings such as plastics, rubber, the coal slime powder of 5-60% is added, through melt blending the two is mixed to get final product, and when 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 the pH value to 7.0 that hydrochloric acid and sodium hydroxide are regulated ore pulp, then stirs 500 rev/mins.The slurries that stir are carried out classification with hydrocyclone, remove the coarse particles greater than 0.5mm.Then, ground 1 hour with planetary ball mill, filtration moves into agitation vat with filter cake, add ethanol preparation solid content 20wt% slurries (containing coal slime 140g), add amido silicon oil 5g, continued mechanical stirring 1 hour, take out slurry, in loft drier, dry under 200 degree, pulverize through pulverizer and obtain 2.4 microns of median sizes, the modification coal slime powder of contact angle 125 degree.
Embodiment 2, get the 200g delivering dry coal slurry, add 800 ml waters, and the slurries of preparation concentration 20wt% add hydrochloric acid and sodium hydroxide and regulate plasm PH value to 8.5, stir 1000 rev/mins.Then through hydroclone classification, remove the coarse particles greater than 0.5mm.Ground 2 hours with planetary ball mill again, filtration moves into agitation vat with filter cake, add ethanol preparation solid content 40% slurries (containing coal slime 136g), add hydroxy silicon oil 2g, continued mechanical stirring 3 hours, filter-press dehydration, the modification coal slime powder that makes 2.1 microns of median sizes, contact angle 120 degree is pulverized in 150 degree oven dry.
Embodiment 3, get the 200g delivering dry coal slurry, add, and 600 ml waters, the slurries of preparation concentration 25wt% add hydrochloric acid and sodium hydroxide and regulate plasm PH value to 8.0, stir 1000 rev/mins.Then through hydroclone classification, remove the coarse particles greater than 0.5mm.Ground 4 hours with planetary ball mill again, filtration moves into agitation vat with filter cake, add ethanol preparation solid content 50% slurries (containing coal slime 120g), add methyl-silicone oil 4g and continued mechanical stirring 5 hours, the modification coal slime powder that makes 1.8 microns of median sizes, contact angle 145 degree is pulverized in 150 degree oven dry.
Should be understood that, for those of ordinary skills, can be improved according to the above description or conversion, and all these improvement and conversion all should belong to the protection domain of claims of the present invention.

Claims (1)

1. the preparation method of a coal slime powder body material is characterized in that, may further comprise the steps:
A1, slurrying classification add entry with raw material, prepare the ore pulp that concentration is 10-40wt% through mechanical stirring, and the pH value of ore pulp is adjusted to 6-10, squeeze into hydraulic classification swirler with pump, remove particle diameter greater than the coarse particles of 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 are sent the slurry after going slightly into disintegrating machine, carry out micronization; 500-1500 rev/min of disintegrating machine rotating speed, the 2-5 hour stripping time of mill;
A3, mechanical-chemical modification after the Ultrafine Grinding stripping, filter, and then use ethanol as dispersion medium, the slurries of preparation solid content 20-60wt% in agitation vat, and the surface-modifying agent that adds coal slime weight 0.1-5% in the slurries continues 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, drying are broken up, and with the slurries after the modification, then drying breaks up in homogenizer or grinding machine, and the time is 3-15 minute; Make at last particle diameter d 50≤ 2.5 microns, d 90≤ 4.6 microns, the coal slime powder body material of contact angle θ 〉=110 degree.
CN201210473134.6A 2012-11-09 2012-11-09 Method for preparing coal slime powder material Expired - Fee Related CN102977641B (en)

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Cited By (5)

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CN106929114A (en) * 2017-03-30 2017-07-07 陕西科技大学 A kind of low-order coal surface be modified improve slurry performance method
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
CN108668833A (en) * 2018-05-21 2018-10-19 甘宜山 The clean utilization method of the coal slime generated in process of coal mining
CN109126647A (en) * 2018-09-08 2019-01-04 佛山市森昂生物科技有限公司 A kind of preparation method of graphene oxide-sodium alginate gel ball
CN109395872A (en) * 2018-10-19 2019-03-01 西安科技大学 A kind of hydrophobic molybdic tailing raw powder's production technology

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106929114A (en) * 2017-03-30 2017-07-07 陕西科技大学 A kind of low-order coal surface be modified improve slurry performance method
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
CN108668833A (en) * 2018-05-21 2018-10-19 甘宜山 The clean utilization method of the coal slime generated in process of coal mining
CN108668833B (en) * 2018-05-21 2020-10-16 甘宜山 Clean utilization method of coal slime produced in coal mining process
CN109126647A (en) * 2018-09-08 2019-01-04 佛山市森昂生物科技有限公司 A kind of preparation method of graphene oxide-sodium alginate gel ball
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
CN109395872A (en) * 2018-10-19 2019-03-01 西安科技大学 A kind of hydrophobic molybdic tailing raw powder's production technology

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