Extraction of metal values from leached slurries

Details Extraction of metal values from leached slurries Extraction of metal values from leached slurries

C - Chemistry, Metallurgy

22

B

53/369, 53/375

C22B 15/00 (2006.01) C01G 3/00 (2006.01) C01G 53/00 (2006.01) C22B 3/14 (2006.01) C22B 3/30 (2006.01) C22B 34/34 (2006.01) C22B 47/00 (2006.01)

Patent

CA 1059769

ABSTRACT OF THE DISCLOSURE A process in which copper, nickel, cobalt and molybdenum are recovered by leaching comminuted raw manganese nodules with an aqueous ammoniacal leach solution containing cuprous ions. An improvement is disclosed in which the metal values are extracted directly from the leach slurry with an organic extractant. To accomplish such extraction the amount by weight of solids in the slurry is maintained at less than 20 percent, the pH of the slurry is lowered to 9.5, the volumes of slurry and organic are maintained at a ratio so that the organic is the continuous phase and the organic and slurry are mixed with gentle agitation.

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