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Calcination is thermal decomposition of a material. ... The most common example of roasting is the oxidation of metal sulfide ores.

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1. A process of treating a granular sulfide ore containing gold and at least one of the metals silver, copper, nickel, zinc or iron, where through calcination at ...

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Roasted gold ore from Cripple ... Sulfating roasting oxidizes certain sulfide ores to sulfates in a controlled supply of air to enable leaching of the sulfate for ...

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Recovery of Gold in Pyritic Sulfide Ores The now extinct Us Bureau of Mines conducted numerous studies of gold in pyrite, and sulfide ores …

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