Titanium carbide tungsten cobalt alloy, metal silicon jet crushing disc and jet mill

Abstract

The invention provides a titanium carbide tungsten-cobalt alloy, a metal silicon jet crushing disc and a jet pulverizer and belongs to the field of polysilicon production. The alloy comprises the following components in percentage by weight: 25-35% of titanium carbide, 35-45% of tungsten carbide, 15-17% of cobalt and the balance of nickel. The crushing disc comprises a surface disc and a base used for fixing the bottom of the surface disc, wherein the surface disc is made from the titanium carbide tungsten-cobalt alloy. The pulverizer comprises a pulverizing chamber and the crushing disc, wherein the base is fixed inside the pulverizing chamber. The alloy is excellent in impact resistance and wear resistance, the silica fume production amount of the crushing disc and the pulverizer is obviously reduced, and the utilization rate of the metal silicon is improved; and meanwhile, the pulverizing efficiency and yield are high, the silicon powder yield is high, and the service life of the equipment is long.

Description

technical field [0001] The invention relates to the field of polysilicon production, in particular to a titanium carbide tungsten-cobalt alloy, a metal silicon jet crushing disc and a jet pulverizer. Background technique [0002] In the field of polysilicon production, silicon powder is the main raw material for the production of trichlorosilane (also known as silicon chloroform). In the production process of polycrystalline silicon such as trichlorosilane, silicon powder is obtained by pulverizing metal silicon particles. At present, the commonly used equipment for the crushing of metal silicon is the jet pulverizer, which uses the huge kinetic energy of the high-speed airflow generated by the gas under different pressures through the nozzle, so that the material particles collide with each other or collide with the crushing disc to achieve crushing. Purpose. [0003] However, since metallic silicon is a hard substance, the wear and tear on the equipment, especially the c...

AI Technical Summary

Problems solved by technology

[0003] However, since metal silicon is a hard substance, the wear and tear on the equipment, especially the crushing disc, is particularly serious when it collides with the airflow, which reduces the service life of the crushing disc and the jet mill.

At the same time, the frequent replacement of the broken disc will affect the normal production efficiency of silicon powder and reduce the output of silicon powder

Increased production cost of polysilicon

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