A systematic review of sustainable gold extraction from raw ores …
Arsenical gold ores: Arsenopyrite can be depressed to promote pyrite flotation by heating the bulk concentrate to 75 °C at a pH of 4.5 in the presence of small quantities of potassium permaganate or disodium phosphate. Alternatively, flotation of pyrite can be achieved using either ethyl xanthate or potassium butyl xanthate as a collector ...
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