The remainder of the gold reports to the sulphide flotation feed. The oxidised slurry is neutralised with lime before leaching in an eight-stage oxide cyanidation circuit. Gold-bearing solutions are recovered by three filters. Pre-treatment thickener overflow passes through pressure filters to remove any solids. The gold in solution is absorbed onto the carbon.
Loaded carbon is stripped using a caustic solution.
Solutions from the oxide leach and the carbon strip circuits are combined and clarified in a hopper clarifier followed by pressure filtering. The impurities oxidize and combine with the fluxes which separate from the bullion. A shaft hoist in operation at the Campbell mine. A loader with a scoop of gold bearing rock. A jackleg drill in operation.