Leaching nickeliferous oxide ores

Details Leaching nickeliferous oxide ores Leaching nickeliferous oxide ores

1978-11-06

1980-03-25

Hearn, Brian E.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Iron group metal

C01G 5310

Patent

active

041950658

ABSTRACT:
In leaching a slurry of nickeliferous oxide ore containing less than about 35% iron with sulfuric acid under superatmospheric pressures at temperatures between about 230.degree. C. and about 300.degree. C. a water-soluble alkali metal or ammonium compound is added to the slurry after leaching is more than about 50% complete whereby the settling characteristics of the leached slurry during solids-liquids separation are improved.

REFERENCES:
patent: 3436177 (1969-02-01), Spedden
patent: 3773891 (1973-11-01), O'Neill
patent: 3793430 (1974-02-01), Weston
patent: 4044096 (1977-08-01), Queneau et al.
patent: 4098870 (1978-07-01), Fekete et al.
patent: 4128617 (1978-12-01), DeGuire
Cotterill et al., Editors, Lead and Zinc, vol., II, AIME, N. Y. 1970, pp. 425, 426.

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