gold is a byproduct of copper production

Jan 01, 2016 From a gold world production of approximately 2600 metric tons in 2004, about 10% was recovered as a byproduct (Chen and Dutrizac, 2004). Most of that secondary gold is recovered as a byproduct from the copper industry, but significant quantities of gold are also recovered as a byproduct from the nickel and lead industry, and the potential also ...

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