• gold processing :: Mining and concentrating | Encyclopedia Britannica

    Amalgamation is accomplished by passing a slurry of ore over copper plates coated with ... the use of carefully designed equipment to ensure against contamination. ... For extracting gold from low-grade ores, heap leaching is practiced.

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  • Gold Articles: Geology, Mining, Prospecting, History, Tools

    An index to articles on gold geology, mining, prospecting, history, and tools.

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  • Industries – Pyrite Mining - Stafford County Museum

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