Hydrometallurgical recovery of nickel values

Details Hydrometallurgical recovery of nickel values Hydrometallurgical recovery of nickel values

1979-05-07

1980-10-21

Ozaki, G.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75 1R, 75 7, 75 82, 75111, 75119, 423138, 423150, C22B 2304

Patent

active

042292131

ABSTRACT:
The recovery of metal values such as nickel from a metal bearing source such as lateritic ores in which the metal bearing source is subjected to a reductive roast at an elevated temperature in the range of from about 700.degree. to about 1300.degree. F. in contact with at least one additive and thereafter extracting the metal bearing source in an ammoniacal solution whereby the desired metal such as nickel is leached out and recovered, the yield of the desired metal may be increased by subjecting the source to an annealing process during the reductive roast thereof.

REFERENCES:
patent: 3100700 (1963-08-01), Hills
patent: 3655364 (1972-04-01), Evans et al.
patent: 3772423 (1973-11-01), Stevens et al.
patent: 3772424 (1973-11-01), Stevens et al.
patent: 3845189 (1974-10-01), Miller et al.
patent: 3860689 (1975-01-01), Setton et al.
patent: 3985556 (1976-10-01), Siemens et al.

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