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Preparation method for preparing silica powder from ordinary quartz raw mineral materials

A mineral raw material, silicon micropowder technology, applied in the direction of silicon oxide, silicon dioxide, fibrous fillers, etc., can solve the problems of inhomogeneous particles, high production cost, wide product particle size distribution, etc., to enhance the flocculation ability and improve the molecular weight. Effect

Inactive Publication Date: 2018-11-23
安徽东阳矿业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conventional physical method is to use a ball mill for dry and wet ball milling, which generally can only process silicon micropowder with a fineness of ≥2μm, and the particle size distribution of the product is wide, and the particles are not uniform enough; to produce ultrafine silicon powder with a particle size of <1.0μm Micro-powder generally adopts chemical method, the process is complicated, special equipment is required, the production cost is high, and it is easy to cause environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A preparation method for preparing silicon micropowder by using common quartz mineral raw materials, comprising the steps of:

[0030] Mineral dressing, select quartz ore of consistent size;

[0031] Crushing, add the above quartz ore into water, stir to make it completely submerged, add dispersion liquid after soaking for 12 hours, stir evenly, continue soaking for 12 hours, take it out, dry, calcinate at a high temperature of 1000-1100°C, then quench and put in a press Down rolling into powder, and then through wet ball milling to obtain a powder with a particle size of 60-80 mesh; the dispersion liquid includes 5 parts of sodium carbonate, 5 parts of quaternary ammonium salt type corrosion inhibitor, 5 parts of polyacrylamide, 5 parts of dispersant, 3 parts of silicone oil, 5 parts of chelating agent, 5 parts of polyethylene glycol, 200 parts of water.

[0032] Cleaning, first wash with water to remove dust and impurities on the surface of the quartz gravel, then im...

Embodiment 2

[0044] A preparation method for preparing silicon micropowder by using common quartz mineral raw materials, comprising the steps of:

[0045] Mineral dressing, select quartz ore of consistent size;

[0046] Crushing, add the above quartz ore into water, stir to make it completely submerged, add dispersion liquid after soaking for 12 hours, stir evenly, continue soaking for 12 hours, take it out, dry, calcinate at a high temperature of 1000-1100°C, then quench and put in a press Down rolling into powder, and then through wet ball milling to obtain a powder with a particle size of 60-80 mesh; the dispersion liquid includes 10 parts of sodium carbonate, 10 parts of quaternary ammonium salt type corrosion inhibitor, 10 parts of polyacrylamide, 10 parts of dispersant, 5 parts of silicone oil, 10 parts of chelating agent, 10 parts of polyethylene glycol, 300 parts of water.

[0047] Cleaning, first wash with water to remove dust and impurities on the surface of the quartz gravel, t...

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Abstract

The invention discloses a preparation method for preparing silica powder from ordinary quartz raw mineral materials. The preparation method comprises the steps: selecting ore, breaking, cleaning, grinding, removing iron, separating, drying, ball milling, grading, grading again, removing surface residues, adding into a reactor, adding ammonium hydroxide with a mass ratio of 1 to 1, adjusting a pH to be equal to 8 to 9, controlling a temperature as 100 to 110 DEG C, preheating 1 to 1.5 hours to removing moisture, cooling to 80 to 90 DEG C, adding a modifying agent to perform surface modification, stirring 50 to 60 min and drying to obtain high-purity silica powder. The prepared silica powder is hydrophobic (lipophilic) high-purity white micro powder without toxin, odor and pollution and hasexcellent performance of good temperature resistance, acid and alkali corrosion resistance, poor thermal conductivity, high insulation, low expansion, stable chemical performance, large hardness and the like.

Description

Technical field: [0001] The invention relates to the technical field of micropowder processing, in particular to a method for preparing silicon micropowder by using common quartz mineral raw materials. Background technique: [0002] Silica has excellent physical and chemical properties such as high temperature resistance, acid and alkali resistance, small thermal expansion coefficient, high insulation, piezoelectric effect, and resonance effect. Therefore, silica micropowder is widely used in paints, coatings, rubber, plastics, Chemical products such as epoxy resin and advanced ceramics, and electronic and electrical products such as computer chips, optical fibers, and insulating electrical materials. The quality of silica powder products is not only related to its purity, but also closely related to its particle fineness. The higher the purity, the finer the particles, the higher the application quality and the wider the application range. At present, the production method...

Claims

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Application Information

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IPC IPC(8): C09C1/28C09C3/10C01B33/18C08K9/04C08K9/06C08K9/02C08K3/36C08L23/00
CPCC01B33/18C01P2004/62C08K3/36C08K9/02C08K9/06C08K9/08C08L2201/08C09C1/28C09C3/10C08L23/00
Inventor 张立明刘冠东
Owner 安徽东阳矿业科技有限公司
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