Cholinga: Graphite petroleum coke GPC imapangidwa ndi petroleum coke yapamwamba kwambiri. Ndi mtundu wa carburizing agent wapamwamba kwambiri, wokhala ndi carbon yokhazikika kwambiri, sulfure yochepa, phulusa lochepa, kuyamwa kwakukulu ndi zabwino zina. Ingagwiritsidwe ntchito kupanga chitsulo chapamwamba kwambiri, chitsulo chosungunuka ndi alloy.
