Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent
1985-03-04
1986-08-19
Doll, John
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
75 2, 75115, 75119, 75118R, 75121, 423 22, 423 27, 423 36, 423 45, 423 98, 423109, 423150, 423509, 423 87, 266168, C22B 300
Patent
active
046067639
ABSTRACT:
A process for the pressure oxidation leaching of non-ferrous metal sulphidic material which comprises providing an autoclave assembly which has a series of successive compartments, the first compartment of which being substantially larger in size than each of the remaining compartments. An oxygen partial pressure is provided in the autoclave assembly 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 temperature in the first and successive compartments to be sufficient to produce autogeneous oxidation of the sulphidic material. The oxidized slurry from the last compartment of the series is discharged.
REFERENCES:
patent: 4124462 (1978-10-01), Reinhardt et al.
patent: 4431613 (1984-02-01), Verbaan
Delbridge Robert F.
Doll John
Fors Arne I.
Sherritt Gordon Mines Limited
Stoll Robert L.
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