【摘要】 用汞齐法先提取出矿石中的自然金，然后，用氰化法提取出微细的金粒和化合态的金银，再经熔炼，可得到较纯的金和银。更多还原

【Abstract】 First, natural gold was extracted from ore using amalgam process,then,fine particle of gold,and combined gold and silver were extractedusing cyanide method,after smelt, pure gold and silver were obtained.更多还原