Method of oxidative leaching of molybdenum—rhenium sulfide ores and/or concentrates

摘要

A method for leaching molybdenum and/or rhenium from a sulfide ore and/or concentrate containing such, the method comprising the steps of: Exposing the ore and/or concentrate to an aqueous solution of chlorine-based oxidizing species in which the sum of the concentrations of hypochlorite and hypochlorous acid is at least 10 mol % of the chlorine-based oxidizing species; Allowing and/or facilitating the oxidation of the molybdenum and/or rhenium by the hypochlorite and/or hypochlorous acid, thereby decreasing the pH such that the predominant chlorine-based oxidizing species becomes chlorine; Allowing and/or facilitating the oxidation of the molybdenum and/or rhenium by the chlorine thereby producing a pregnant leach solution; and Passing the pregnant leach solution to a means for metal recovery.

主权项

1. A method for leaching molybdenum and/or rhenium from a sulfide ore and/or concentrate containing such, the method comprising the steps of:
exposing the ore and/or concentrate to an aqueous solution of chlorine-based oxidizing species, the aqueous solution having a pH and comprising hypochlorite and hypochlorous acid, wherein the sum of the concentration of the hypochlorite and hypochlorous acid in the aqueous solution is at least 10 mol % of the chlorine-based oxidizing species; allowing and/or facilitating oxidation of the molybdenum and/or rhenium by the hypochlorite and/or hypochlorous acid, thereby decreasing the pH such that the predominant chlorine-based oxidizing species becomes chlorine; allowing and/or facilitating the oxidation of the molybdenum and/or rhenium by the chlorine thereby producing a pregnant leach solution; and passing the pregnant leach solution to a means for metal recovery.