Chinangwa: Graphite petroleum coke GPC yakagadzirwa nepetroleum coke yemhando yepamusoro. Imhando yecarburizing agent yemhando yepamusoro, ine kabhoni yakagadzika, sarufa yakaderera, dota shoma, mwero wekunyudzwa kwakanyanya nezvimwe zvakanakira. Inogona kushandiswa kugadzira simbi yemhando yepamusoro, simbi yakakandwa uye alloy.