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gold ore pretreatment increases recovery

2016720ensp ensp30000 kg of gold in 1990 Thiobacillus ferrooxidans was used to recover gold from a complex ore under laboratory conditions9 The ore contained 82 Fe 078 Cu 088 As and 35 g Auton with pyrite hematite arsenopyrite and chalcopyrite as the mai n metalbearing minerals Initial gold recovery by