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Raw materials and processing mechanism of spherical graphite

wallpapers Industry 2021-03-25

Raw material of spherical graphite
The raw materials of spherical graphite are high-quality high-carbon natural flake graphite and high-quality high-carbon graphite.
Natural flake graphite can be divided into crystalline graphite (flake graphite) and cryptocrystalline graphite according to the crystalline form. Compared with cryptocrystalline graphite, flake graphite ore crystallizes well. The crystal size is greater than 1μm. It belongs to the hexagonal crystal system and has a layered structure. It has good high temperature resistance, electrical conductivity, thermal conductivity, lubrication, plasticity and acid and alkali resistance.
 
Natural flake graphite can be divided into high purity graphite, high carbon graphite, medium carbon graphite, low carbon graphite according to the fixed carbon content.
The carbon content of high-carbon graphite is greater than or equal to 94.0%, but less than 99.9%. The higher the carbon content of the raw material, the higher the cost; but the carbon content of the raw material is too low, the number of rounds of purification of spherical graphite increases, and the degree of equipment wear will increase. The total cost also increases. After practice and accumulation, it contains 95%~96% of raw materials, and the comprehensive cost is the most economical. The particle size of the raw materials should be appropriate. Too coarse the cost is higher; too fine to affect the yield rate of spherical graphite, too much auxiliary products will increase the cost of raw materials. Studies have shown that it is more appropriate to use raw materials with a particle size of -100 mesh to produce spherical graphite.
 
Spherical graphite processing mechanism
Firstly, the natural flake graphite powder is pulverized into a suitable particle size, and then the de-angularization processing is carried out to make it finally form an ellipsoidal or spheroidal shape. At the same time, the spherical particles are peeled off from the de-angularization process by a classifying device fines separated, you can get a normal distribution of spherical graphite.

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