I-Graphitized Petroleum Coke (GPC) iyinto ebalulekile embonini yensimbi, esetshenziswa kabanzi njenge-carbon raiser (recarburizer) ekwenzeni insimbi kanye nezinqubo zokukhipha. Ikhiqizwa nge-graphitization ephezulu yokushisa kwe-petroleum coke ku-2,500-3,500°C, ebonakala ngokuqukethwe kwayo okuphezulu kwekhabhoni, i-sulfur ephansi, kanye namazinga aphansi okungcola. I-GPC yaziwa ngesilinganiso sayo esiphakeme sokumuncwa, ukusebenza okuzinzile, kanye nokusebenza kahle ekunciphiseni izinto eziyingozi njenge-sulfur ne-nitrogen ensimbini encibilikisiwe. Lokhu kwenza kube yinto efanelekile yokukhiqiza insimbi esezingeni eliphezulu, insimbi ephonswe, kanye nama-alloys.
