Graphite is a low hardness (Mohs hardness of 2) of the black to grayish black mineral, produced in the world. Crystal graphite is hexagonal plate and sheet, the aggregate was scaly, due to lubrication, electrical conductivity, high temperature resistance, chemical inertness and low thermal expansion and other special properties and widely used in refractory products. The main types are: refractory bricks and high melting point plastic; crucible brakes, nozzles, etc .; brick for continuous casting powder; casting core and mold coating; mold powder (steelmaking).