One of the main uses of graphite is to produce refractory materials, including refractory bricks, crucibles, continuous casting powder, mold cores, molds, detergents and high temperature resistant materials. In recent years, two important changes in the refractory industry are the application of MgO-C Bricks in steel-making furnaces? It is widely used in lining and Al-C brick in continuous casting. The graphite refractories are closely connected with the steel-making industry, and the world steel-making industry consumes about refractories.
Because graphite has many excellent properties, it is widely used in metallurgy, machinery, electrical, chemical, textile, national defense and other industrial sectors. It can be used as refractory. Graphite products maintain the original chemical properties of flake graphite and have strong self-lubricating properties. The characteristics of graphite powder are high strength, acid resistance, corrosion resistance, high temperature resistance of 3000 ℃ and low temperature resistance of -204 ℃. At the same time, its compressive strength is greater than 800kg/cm2, and it is anti-oxidation. The weight loss in air at 450 ℃ is 1%, and the rebound rate is? 15-50% (density 1.1-1.5). Therefore, graphite products have been widely used in metallurgy, chemical industry, petrochemical industry, high energy physics, aerospace, electronics and other industries.
Graphite electrode is a kind of graphite conductive material with high temperature resistance, which is made of petroleum coke and asphalt coke as granular materials and coal tar pitch as binder through} kneading, molding, roasting, graphitization and mechanical processing. Graphite electrode is an important high-temperature conductive material for electric furnace steelmaking. It inputs electric energy to the electric furnace through the graphite electrode, and uses the high temperature generated by the arc between the electrode end and the furnace charge as the heat source to melt the furnace charge for steelmaking. Other electric smelting or electrolysis equipment often use graphite electrode as the conductive material. In 2000, the world consumed about 1million tons of graphite electrodes, and China consumed about 250000 tons of graphite electrodes in 2000. Using the excellent physical and chemical properties of graphite electrode, it is also widely used in other industrial sectors. The carbon products industry with the production of graphite electrode as the main variety has become an important component of the contemporary raw material industry.
