METHOD FOR LEACHING OF COPPER AND MOLYBDENUM

摘要

A method for leaching copper and molybdenum from an ore, residue and/or concentrate containing such, in which more than 1% of the total molybdenum is present as a sulfide and in which more than 1% of the total copper is present as an oxide, the method comprising the steps of: Exposing the ore, residue and/or concentrate to an aqueous solution of chlorine (I)-based oxidising species of a p H of at least 3.0; Allowing and/or facilitating the oxidation of the molybdenum by the chlorine- based oxidising species thereby providing a treated ore, residue and/or concentrate and a reduced aqueous solution of chlorine-based oxidising species; and Leaching the treated ore, residue and/or concentrate by exposing the treated ore, residue and/or concentrate to an aqueous ammoniacal ammonium carbonate solution to form a pregnant leach solution containing both copper and molybdenum; Passing the pregnant leach solution containing both copper and molybdenum to a means for metal recovery.