Brief introduction of iron powder Iron powder according to particle size, habit is divided into coarse powder, medium powder, fine powder, fine powder and ultra-fine powder five grades. Particle size of 150 to 500 mu m range of particles composed of coarse powder, particle size of 44 to 150 m for the medium powder, 10 to 44 m for fine powder, 0.5 ~ 10 m for the very fine powder, less than 0.5 m for the ultra-fine powder. General will be able to through a 325 goal quasi sieve particle size of less than 44 m powder known as Subsieve powder, if more high precision screen specific provisions can only be used air classification equipment, but for a number of easy oxidation of the iron it can only be used JZDF nitrogen protection classifier to do. Reduced iron powder, gray or black powder, also known as double suction agent, can absorb moisture and oxygen in the air, commonly used in food preservation. Reduced iron powder generally consisted of Fe3O4 under high temperature conditions in the flow of hydrogen or carbon monoxide gas reduction and generation, the main ingredient for the loose structure of elemental iron. Atomized iron powder with high compressibility, high green strength, single pressure can obtain density in pressure slab 6.80g/cm3 above, especially to the pressing and sintering with high strength parts. The scope of atomized iron powder: density in the sintering deposit of more than 6.80g/cm3 is parts, powder metallurgy forging parts. Iron powder characteristics: I plant iron, iron, HW, iron ore, atomized iron, spraying iron main characteristics of products is round rate is high, than major, the surface is smooth, particle high compressibility, good hardness, with impact force resistance, compression is good, in the spray thrown sand operations using life is long, the blasting effect is excellent, and dust, with environmental protection operations and reduce the damage to human body has the advantages of is blasting operations of high-end electronic products preferred. Iron powder application Shot blasting forming on the surface of the product special matte effect; sandblasting surface spraying burr, clean, surface strengthening, sand light, derusting and various profiles of the surface cleaning and coating, electroplating of roughness (NAP) pretreatment; also can be used as additive of heavy concrete and blast furnace refractory material to increase the wear resistance, resistance to high temperature, anti erosion and oil filtering tank, product weight tc..