... at all, graphite petroleum coke has high absorptive character, no residue will be left, save production cost.1, Usage: used to ... in steel-melting and Ductile iron foundry2, Characteristic: high carbon, low sulfur, with stable effect for improving the carbon content, high ... -iron for improving the carbon content Graphite Petroleum Coke (GPC)/Low Sulphur 0.05%/FC 98.5%