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At what temperature is copper concentrate roasted in older processing methods?
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copper processing
Molten copper being made into plates.
In older copper processing methods, the concentrate is roasted in a cylindrical, refractory-lined furnace at a temperature of approximately 590 °C (1,100 °F).1
During this process, the concentrate is heated by a stream of hot air to drive off volatile impurities such as arsenic, mercury, and a portion of the sulfur.1