Graphitized Petroleum Coke (GPC) chinhu chakakosha muindasitiri yesimbi, chinoshandiswa zvakanyanya semuchina wekusimudzira kabhoni (recarburizer) mukugadzira simbi nekugadzira simbi. Inogadzirwa kuburikidza negraphitization yepamusoro-soro yepetroleum coke pa2,500-3,500°C, inoratidzwa nehuwandu hwayo hwakagadzika hwekabhoni, sarufa yakaderera, uye mwero wakaderera wekusvibiswa. GPC inozivikanwa nekukwira kwayo kwakanyanya kwekunyudzwa, kushanda kwayo kwakasimba, uye kushanda zvakanaka mukuderedza zvinhu zvinokuvadza senge sarufa nenitrogen musimbi yakanyungudutswa. Izvi zvinoita kuti ive chinhu chakanakira kugadzira simbi yemhando yepamusoro, simbi yakakandwa, uye alloys.
