east kazakhstan region, kazakhstan - 12.02.2015 : the chemical tank is covered with plastic balls to slow evaporation

12022015 acid asia balls business cathode central chemical clear company control copper copperas covered east eco ecology economy editorial electricity electrorefining engineering equipment evaporation green heavy industrial ingot kazakhstan kazminerals kazzinc large lift liquid machine machinery manufacture metal metallurgy mining mixture modern operator people plant plastic plate process processing production purification purify refining region slow smelter storage sulfuric sulphuric tank technology transportation work workshop