Sulphide copper ores are normally concentrated by flotation while the oxide ores undergo hydrometallurgical treatments. The mixed sulphide-oxide copper ores may be processed by combined methods such as flotation followed by leaching and precipitation of the oxidized portion, or vice-versa. Also a Leach-Precipitation-Float Process (LPF Process) has been successfully applied. However, when oxide or mixed … Read more
EXECUTIVE SUMMARY A Metallurgical Laboratory had completed preliminary economic studies on various processing options applicable to the Minerals Project in South America, containing oxide, transition and sulfide ore reserves. These included heap leaching with SX-EW; use of Roast-Leach-EW of sulfide concentrates to produce CuSO4 crystals; and potential application of the Leach-Precipitation-Flotation (LPF) option to treat … Read more
The LPF process is uses for treatment of copper ores in which part or all of the copper occurs in oxidized form presents a problem for recovery. Sulphidization of the oxidized copper minerals using sodium sulphide or sodium sulphydrate is sometimes effective to render the minerals floatable, but generally sulphidization techniques produce low recoveries. Many … Read more