Method and special apparatus for improving surface purity and surface cleanliness of silicon carbide particles

Abstract

The invention discloses a method and special apparatus for improving surface purity and surface cleanliness of silicon carbide particles. The method is characterized in that cleaning and dust removal are conducted on the surface of silicon carbide through a physical method, namely, silicon carbide particle materials are pushed by strong airflow to rotate at a high speed and to be thrown up, the silicon carbide particle materials are processed through repeated collision and friction, the silicon carbide particle materials can be separated from suspension dust among the silicon carbide particle materials and surface adhesion dust, and finally the requirement for improving the surface purity and the surface cleanliness of the silicon carbide particle materials is met. According to the method, the surface purity and the surface cleanliness of the silicon carbide particle materials are improved through the physical method instead of a chemical method, the suspension dust among the crushed silicon carbide particle materials and the particle surface adhesion dust can be effectively removed, the production cost is reduced to a great extent, production efficiency of the back end working procedure is improved, zero emission of pollutants is basically achieved in the whole production process, and the foundation is laid for large-scale industrial production and realization of automatic control in the production process.

Description

technical field [0001] The invention belongs to the field of production and processing of silicon carbide particle materials, and specifically relates to a method and special equipment for improving the surface purity and surface cleanliness of silicon carbide particles, which are used to improve the surface purity and surface cleanliness of silicon carbide particles and improve silicon carbide particles. particle surface properties. Background technique [0002] Silicon carbide is made of quartz sand and petroleum coke (or coal coke) as the main raw materials, and is smelted through high-temperature resistance furnace. Silicon carbide has many characteristics such as high mechanical strength, good thermal conductivity, good nonlinear conductivity, small thermal expansion coefficient, corrosion resistance, high temperature positive temperature characteristics, etc., making it widely used in refractory materials, grinding, engineering ceramics, steel , machinery, aerospace, ...

AI Technical Summary

Problems solved by technology

[0006] 1. There are many production links, such as slurry preparation, mixing, separation, neutralization, drying, and sediment treatment, etc.

[0007] 2. The production process produces a large amount of secondary pollutants, such as waste acid, waste alkali, waste water, etc.;

[0008] 3. The drying consumes a lot of energy, and it is easy to produce residual moisture, which is unfavorable to the use of later products;

[0009] 4. There are certain geographical limitations. Most of the large settling tanks are built outdoors, and winter production in extremely cold areas is affected;

[0010] 5. It is not conducive to large-scale industrial production, it is difficult to realize automatic control of the entire process connection, and it is also not conducive to enterprises to promote clean production

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