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The mill is designed to treat a minimal 1.82 million tonnes per year of ore. Ore is fed through a crusher prior to being introduced into the grinding circuit. Milling is conducted in a semi-autogenous grinding mill/ball mill circuit. The pulp produced by the milling is subjected to tank leaching with cyanide. After leaching the ore in the large tanks, the pulp is ‘washed’ in a series of settling units (counter-current decantation). This effectively produces two products: a clear gold and silver bearing solution and also a pulp without precious metal values. The gold and silver solution is sent to the refinery where the metals are precipitated out of solution through the addition of zinc. The precipitate is filtered and smelted to produce dore bars.
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