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5 32 the high cost of gold yanacocha like most modern gold mines uses a process called cyanide-heap leaching to extract tiny bits of ore from rock mining engineers begin by blasting apart hills and other formations

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ore processing lime is added to the ore prior to the addition of cyanide this ensures that the cyanide remains in solution during the process of leaching of the precious metals similarly sulphuric acid is used with superheated water

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