C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/372
C22B 3/00 (2006.01) C22B 3/02 (2006.01) C22B 3/06 (2006.01)
Patent
CA 1228483
ABSTRACT OF THE DISCLOSURE A process for the pressure oxidation leaching of non-ferrous metal sulphidic material which comprises provid- ing an autoclave assembly which has a series of successive compartments, the first compartment of which being substan- tially larger in size than each of the remaining compartments. An oxygen partial pressure is provided in the autoclave as- sembly in the range of from about 50 to about 2000 kPa. An aqueous slurry of the material is fed into the relatively large first compartment with resultant flow of the material through the successive smaller compartments causing the tem- perature in the first and successive compartments to be suffi- cient to produce autogeneous oxidation of the sulphidic material. The oxidized slurry from the last compartment of the series is discharged.
463634
Gowling Lafleur Henderson Llp
Sherritt International Consultants Inc.
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