India Carbon Ltd. Offers Calcined Petroleum Coke - CPC. India Carbon Ltd. Is the manufacturer of calcined petroleum coke [CPC], electrode carbon paste [ECP] and tamping paste which is used widely in the Ferro alloys and allied industries. Calcined Petroleum Coke - CPC is a form of highly electrically conductive, dense carbon with very low specific electrical resistance, and having fixed carbon of approximately 99.5%. Calcined Petroleum Coke - CPC is used as anode in alumina smelters, as electrode for ferroalloy industries, and in the manufacturing of graphite/ graphite electrodes, and thermal paste for Ferro alloys & allied industries in submerged arc furnaces. This CPC is also used in various steel industries for - melting of steel, re-carburization and for making special steels & alloys.