Australian Mines invested in the construction of a demonstration-size processing plant in Perth, with multiple batch and continuous testing campaigns carried out at the facility to confirm the metallurgical process design and recoveries factored in to the Bankable Feasibility Study (BFS) report.
Ore from Sconi was processed through the High Pressure Acid Leach (HPAL) circuit at the demonstration plant, with the resulting leach liquor then taken through scandium solvent extraction, scandium precipitation and calcination, iron removal and mixed sulphide precipitation (MSP). The resulting MSP was then fed through the refinery circuit, which includes pressure oxidation followed by impurity removal, cobalt and nickel solvent extraction and crystallisation steps.
Cobalt sulphate to be produced will contain approx. 21% cobalt metal equivalent
Nickel sulphate to be produced will contain approx. 23% nickel metal equivalent