Recovering metal values from leach residue

Details Recovering metal values from leach residue Recovering metal values from leach residue

C - Chemistry, Metallurgy

22

B

C22B 3/44 (2006.01) C22B 3/04 (2006.01) C22B 23/00 (2006.01)

Patent

CA 2667029

There is also provided a method of treating a metalliferrous material. The method includes providing a metalliferrous material including nickel, cobalt, and iron. At least a fraction of the metalliferrous material is leached with an aqueous solution including dissolved sulphuric acid and dissolved sulphur dioxide in a reaction zone so as to effect production of a leachant including nickel sulphate, cobalt sulphate, and iron sulphate. The leachant is contacted with a reagent material in a reaction zone, wherein the reagent material is aqueous ammonia solution, so as to effect production of a reaction product including a product solution component and a solid residue component. The nickel and cobalt are concentrated in the product solution component, and the iron is concentration in the solid residue component.

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