... /GPC in producing casting, it can increase the used quantity of Scrap steel and reduce the quantity of Scrap iron, or use no ... residue will be left, save production cost.1, Usage: used to improve the Carbon content in steel-melting and Ductile iron foundry2 ... sulfur, with stable effect for improving the carbon content, high absorptive of carbon.3, apply: Used in electric furnace steel smelting and ...