Hydrometallurgical recovery of metal values

Details Hydrometallurgical recovery of metal values Hydrometallurgical recovery of metal values

C - Chemistry, Metallurgy

22

B

53/297

C22B 23/00 (2006.01) C22B 3/06 (2006.01)

Patent

CA 1134621

ABSTRACT In the hydrometallurgical recovery of metal values from ores and the like, the method of improving subsequent extraction with ammonium carbonate solution, which comprises effecting a reducing step by means of a reducing gas at a temperature of from about 1000° to about 1800°F. in contact with added hydrogen halide or precursor thereof. In another embodiment, both the added hydrogen halide and added sulfur are utilized in the reducing step.

162758

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