The main uses of reduced iron powder are: powder metallurgy products reduced iron powder, this industry consumes 60% to 80% of the total amount of reduced iron powder. The reduced iron powder for welding electrode, adding 10 ~ 70% iron powder to the coating can improve the welding process of the electrode and significantly improve the deposition efficiency. Reduced iron powder for chemical industry, mainly used for chemical catalyst, precious metal reduction, alloy addition, copper replacement, etc. Cutting stainless steel iron powder, when cutting steel products, spraying iron powder into the oxygen-acetylene flame can improve the cutting performance, expand the scope of cutting steel, and increase the thickness of cutting. With the continuous improvement of technology in China's powder metallurgy industry, powder metallurgy parts are widely used in aircraft, motorcycles, family cars, automobiles, agricultural machinery, mining, electric tools, machine tools, transportation and other machinery industries.

Reduced iron powder according to the particle size, the habit is divided into coarse powder, medium powder, fine powder, fine powder and ultra-fine powder five grades. Iron powder composed of particles with a particle size in the range of 150-500 μm is coarse powder, medium powder with a particle size of 44-150 μm, fine powder with a particle size of 10-44 μm, very fine powder with a particle size of 0.5-10 μm, and ultrafine powder with a particle size of less than 0.5 μm. Generally, the powder that can pass through 325 mesh standard sieve, that is, the powder with particle size less than 44μm, is called sub-sieve powder. For higher precision screening, only air classification equipment can be used, but for some iron powder that is easy to oxidize, JZDF nitrogen protection classifier can only be used. Iron powder mainly includes reduced iron powder and atomized iron powder, which are named because of different production methods.