Chromite is a refractory material and can be used to make chrome bricks, chrome magnesia bricks and other special refractory materials. Chromite is the raw material of ferrochrome powder, the size of less than 1mm of iron particle aggregate. Color: Black. It is the main raw material of powder metallurgy. According to the particle size, it is habitually divided into five stages: coarse powder, medium powder, micro powder, micro powder and ultra-fine powder. Within the range of 150500m, it is coarse powder, medium powder is 44150m, fine powder is 1044m, fine powder is 0.510m, and ultrafine powder is less than 0.5m.
(1) In the metallurgical industry, mainly used to produce ferrochrome and chromium metal. Chromium iron alloy as steel additive to produce a variety of high strength, corrosion resistance, wear resistance, high temperature resistance, oxidation resistance of special steel, such as stainless steel, acid-resistant steel, heat resistant steel, ball bearing steel, spring steel, tool steel, etc.
(2) In refractories, used for the manufacture of chrome bricks, chrome magnesia bricks and other special refractories.
(3) In the chemical industry, it is mainly used in pigment, textile, electroplating, leather and other industries, and can also be used to produce catalyst and catalyst agent.
Carbon ferrochrome smelting by reducing furnace, using coke as a reducing agent, silica or bauxite as a flux. The slag compositions are SiO227 ~ 33%, MgO30 ~ 34%, Al2O326 ~ 30%, Cr2O3 < 9.0%. Due to the formation of chromium carbide, the product contains 4 to 9% carbon. Modern smelting chromite reduction furnace capacity of 10,000 ~ 48,000 kVA, generally using closed fixed, smelting power consumption of 3000 ~ 4000 kw
Above is the reduction of ferrochrome powder.