Graphite carbon additive is used as auxiliary materials of carbon addition and desulfurization in steel making and foundry industry.It is also uesd in other industries such as  friction material in brake,add raw materials in production of electrode paste.Under high temperature,the arrangement of carbon atoms is in the form of graphite microstructure,so we called it graphitization.Graphitization can reduce the content of impurities in the graphite carbon additive, increase content of carbon and reduce content of sulfur.Currently graphite carbon additive refers to graphitization petroleum coke.