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processes of mines gold and melting

processes of mines gold and melting

gold bar refining margins on over-capacity | gold news. driven by over-capacity and a decline in the quantity of metal available to refine, the margin charged for toll refining where the supplier of ore or concentrate remains its owner throughout the process, rather than selling it to the refiner has fallen from 1 per ounce 20 years ago to just 20 cents today, said richard hayes

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