Graphite block is a kind of square product in graphite electrode, which is made of petroleum coke and medium temperature coal pitch after crushing, sieving, batching, forming, cooling and baking, impregnation, graphitization and processing of graphite material, with the advantages of high temperature resistance, corrosion resistance, good electrical conductivity, light weight, etc. It is mainly used in large DC resistance furnace, blast furnace brick, conductive electrode, lining anti-corrosion and other applications.