One of the main uses of graphite is in the production of refractory materials, including refractory bricks, graphite crucible, continuous casting powder, graphite mold cores, graphite mold detergents and high temperature resistant materials. Two important changes in the refractory industry in the last 20 years have been the widespread use of magnesia carbon bricks in furnace linings and the use of aluminum-carbon bricks in continuous casting. So that graphite refractory materials and steel industry closely linked, the world steel industry consumes about 70% of the refractory materials.