Mechanochemical Processing of Gold-Bearing Sulphides
Samples of pure pyrite and arsenopyrite and a gold-bearing pyrite/arsenopyrite concentrate have been mechanically milled in inert and oxidizing atmospheres. Pyrite was found to be essentially inert with only slight oxidation to FeSO4 evident only after 100 h milling in oxygen. Arsenopyrite completely oxidized to As2O3 and FeSO4. The milled concentrate was more complex and showed quartz, pyrite and an unidentified phase as the products of milling in oxygen. Leaching of the milled concentrate in...[Show more]
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