Copper in the USA: Copper Producers
Fire refining of blister copper then removes most of the oxygen and other impurities, leaving a product at least 99.5 percent pure, which is cast into anodes. Finally, most anode copper is electrolytically refined ³, usually to a purity of at least 99.95 percent.ASARCO » Smelting,The blister copper is more than 98 percent pure, but it contains too much oxygen. The anode furnace blows natural gas into the melt to burn off the oxygen.At first, a tall yellow flame billows from the top of the anode furnace, but after a few hours it becomes a beautiful blue-green when most of the oxygen in the copper has been burned away .refining of copper in karachi - perkinspreschool,Oct 12, 2017 · Jan 7, 2018 The Saindak copper and gold project is centred in Balochistan's largest . the headquarters of district Chaghi, every Thursday from Karachi. their commitment and took the blister copper to China for refining, he explains.