Process for recovering cobalt

Details Process for recovering cobalt Process for recovering cobalt

C - Chemistry, Metallurgy

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C22C 23/04 (2006.01) C01G 51/10 (2006.01) C22B 23/00 (2006.01) C22B 23/02 (2006.01)

Patent

CA 1044470

A PROCESS FOR RECOVERING COBALT Abstract A process is described for recovering cobalt as cobalt sulfate solution from low-grade cobalt-containing materials. The process comprises (a) reductively smelting oxidized cobaltiferous material rich in iron to extract cobalt as an alloy by selective reduction of oxidized cobalt in preference to oxidized iron, (b) converting the cobalt and iron in the alloy into sulfate by treating the alloy with copper sulfate and water, (c) calcining the resultant mixture containing the sulfates to decompose the iron sulfate selectively into oxide, and (d) leaching the resultant calcine with an aqueous medium to extract cobalt as cobalt sulfate solution, leaving iron as a leach residue.

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