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extraction of gold from ore using the cyanide process in south a
Gold mining WikipediaOther gold mines use underground mining, where the ore is ... soda and cyanide, a process known as elution. Gold is ... gold mines in South Africa; Gold mining ...Gold cyan
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Underground mining (hard rock) WikipediaUnderground hard rock mining refers to various underground mining techniques used to excavate hard minerals, usually those containing metals such as ore
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