... flotation, such as Gold, Silver Mine, galena, sphalerite, chalcopyrite, copper-fai, molybdenite, nickel sulfide minerals; such as pyrite, malachite, ... , and other non-metallic mineral salts and potassium salt, rock salt and other mineral salts. Another important purpose of the ... symbiotic metal minerals, such as from copper, lead, zinc, and other metal ores separate copper, lead, zinc and pyrite, and ...