抄録
The conditions for the selective oxidation of copper and iron sulfide minerals contained in a low-grade molybdenite concentrate during autoclave leaching in acidic media have been studied. The effect of oxygen partial pressure, reaction time and temperature on copper removal has been examined. Oxidation of minerals follows the order; chalcopyrite, pyrite, molybdenite and has been explained from the point of view of electrochemical kinetics. Cementation on iron was used for copper recovery from the leach liquor. The partly oxidized residue consisting of molybdenite and iron (hydro-) oxide can be treated by means of flotation or oxygen pressure leaching in alkaline media to extract molybdenum and rhenium values.
