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time of gold ore process

Jul 16, 2014· During roasting, refractory gold ore is treated with extremely hot air. This causes the sulfites to oxidize, separate from the ore, and become sulfur dioxide. Once all of the sulfides are oxidized, the remaining gold ore can be processed normally. The roasting method has beenaround for hundreds of years. Prior to the20th century, the process was done by burning …

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