How Hydrometallurgy and the SXEW Process Made Copper
To be applicable to this process the ores must contain copper minerals in sulfide form as mineral such as Chalcocite Cu 2 S Chalcopyrite CuFeS 2 and Covellite CuS . In the concentrating operations these minerals are separated from the gangue material of the ore that might contain as little as 0.5 copper to form a concentrate .