The reduced gold powder was used as a gold source and kept excessive in the process of producing KAu(CN) 2.
保持金粉过量投料，控制氰化亚金钾溶液的浓缩水量是得到高纯度和高收率产品的关键。
At last, exploring guides for placer gold deposit are pointed out on the base of study of gold source, placer gold distributive features and enrichment law.
结合金的来源、矿床的分布特征和富集规律，指出了该区今后砂金找矿方向。
Gold source is from Caledonian and Hercynian granite.
该区金直接来源于加里东和华力西花岗岩。
Gold source is from Caledonian and Hercynian granite.
该区金直接来源于加里东和华力西花岗岩。
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