a stage of the extraction of gold

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    The extract is transferred to tanks, and the gold precipitated as a powder by addition of zinc. It is then washed out from the bottom of the tanks, dried, and freed from zinc by roasting and fusing. In the electrolytic precipitation of the gold an iron anode and a sheet-lead cathode are employed, the current-density being very low, about 0.5 amp. per sq.

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    Gold processing: Gold processing, preparation of the ore for use in various products. For thousands of years the word gold has connoted something of beauty or value.

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    B.2. Physical Separation Chemical behaviors of metals and nonmetals are extensively different when using chemical reagents or extraction solvents.