Method for producing green silicon carbide FEPA F P

A green silicon carbide, production method technology, applied in chemical instruments and methods, wet separation, other chemical processes, etc., can solve the problem of reducing anti-shredding ability and grinding efficiency, poor physical and chemical properties of particle surface, poor antistatic effect, etc. problem, to achieve the effect of enhancing anti-shredding ability, excellent particle shape and good affinity

Inactive Publication Date: 2010-05-12
HUNAN JINCHENG NEW MATERIAL TECH
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  • Application Information

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Problems solved by technology

However, for a long time, there have been several problems in the production of silicon carbide in my

Method used

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  • Method for producing green silicon carbide FEPA F P
  • Method for producing green silicon carbide FEPA F P

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Embodiment Construction

[0019] Below by specific embodiment, the present invention is described in detail as follows in conjunction with accompanying drawing:

[0020] The production method of this kind of green silicon carbide grinding and polishing micropowder includes the steps of raw material selection, crushing, air classification, water washing, water conservancy classification and surface coating, pressure filtration, drying, calcination, sieving and packaging and storage in sequence, as described in detail in Down:

[0021] 1. Selection of raw materials. Green silicon carbide raw materials obtained by high-temperature reaction of silica sand and carbonaceous materials require a particle size of less than 20mm, green silicon carbide content > 95%, and moisture content < 2%;

[0022] 2. Use Raymond Pulverizer 1 to pulverize, and the particle size of the machine is 0.005-0.200mm;

[0023] 3. Airflow classification: in figure 1 Among them, the airflow classification system includes a material h...

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Abstract

The invention provides a method for producing green silicon carbide FEPA F P, comprising the following steps in turn: sifting raw materials, grinding, classifying by air flow, cleaning by water, classifying by water conservancy and coating surface, filtering by pressure, drying, calcining, sieving, packaging and warehousing. The invention uses a Raymond grinder for grinding and an air flow classification device for multiple classification, and classifies into products in different levels by water conservatory classification; in water conservatory classification, cladding materials are used asdispersant; in classification, water pressure is stable, multi-level precision is improved by siphon overflow classification, impurities in the crack of the micro powder grains are fully evaporated by calcination and tempering in the later period of production, and the cracks can be healed by high-temperature calcination. The production method in the invention greatly enhances product purity, increases crushing resistance of the grains in grinding and polishing, the grain fineness distribution is even with no large grain and with excellent shape and good affinity to grinding liquid. The invention can produce various green silicon carbide FEPA F P with grain size being less than 100mm.

Description

technical field [0001] The invention relates to a grinding material, namely a production method of green silicon carbide grinding and polishing micropowder. Background technique [0002] Green silicon carbide has excellent properties such as high hardness, high melting point, high stability, high thermal conductivity, low expansion rate, low plasma pollution, low induced radioactivity, and corrosion resistance. It is an internationally advanced high-quality green silicon carbide grinding and polishing micropowder, particle size Narrow distribution, small median diameter deviation, high hardness, no large particles, controllable particle shape, high packing density, large specific surface area, used to manufacture high-tech ceramics for automobiles and ultra-high-speed and large-capacity integrated circuits, and to manufacture advanced refractory materials , as high-precision cutting, grinding and polishing materials in the production of 6-12 inch single wafers, polycrystalli...

Claims

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Application Information

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IPC IPC(8): C09K3/14B04C9/00B03B5/66C04B35/626C04B35/565
Inventor 丁建平丁瑞成丁燕
Owner HUNAN JINCHENG NEW MATERIAL TECH
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