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system chart for gold refining process

Refining.Goldextracted by amalgamation or cyanidation contains a variety of impurities, including zinc, copper, silver, and iron. Two methods are commonly employed for purification: the Millerprocessand the Wohlwillprocess. The Millerprocessis based on the fact that virtually all the impurities present ingoldcombine with gaseous chlorine more readily thangolddoes at temperatures

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