Hydrometallurgical recovery of metal values

Details Hydrometallurgical recovery of metal values Hydrometallurgical recovery of metal values

C - Chemistry, Metallurgy

22

B

53/370

C22B 3/00 (2006.01) C22B 3/14 (2006.01) C22B 23/00 (2006.01)

Patent

CA 1137762

HYDROMETALLURGICAL RECOVERY OF METAL VALUES ABSTRACT Metal values are recovered from metal bearing sources in a hydrometalluryical process in which a metal bearing source such as an ore is reduced with a reductive roast, only or with the presence of at least on additive at temperatures ranging from 500° to 900°C. Thereafter the reduced source is subjected to a leach in the pres- ence of a basic leaching agent to extract the desired metals from the source. In the present invention, the basic leaching agent which is employed comprises an ammoniacal ammonium chloride solution.

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