The crushing mechanism that the jet mill is mainly suitable for determines its wide application range and high finished product fineness. Typical materials are: super-hard diamond, silicon carbide, metal powder, etc. High-purity requirements: ceramic pigments, pharmaceuticals, Biochemical, etc., low temperature requirements: medicine, PVC. By changing the ordinary air in the gas source part to inert gases such as nitrogen and carbon dioxide, the machine can be turned into an inert gas protection equipment, which is suitable for the crushing and classification of flammable, explosive, and oxidizable materials.