Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group ib metal
Patent
1982-07-08
1984-11-20
Carter, Herbert T.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group ib metal
423 1, 423 49, 423132, 423137, 423109, 423150, 423178, C01G 300, C01G 5300, C01G 900, C01G 4500
Patent
active
044838271
ABSTRACT:
The invention relates to a process for the recovery of valuable metals from sulfidic, silicate-containing raw materials by slurrying the raw material in water, by subjecting the slurry to a selective leach under atmospheric conditions and in an acidic milieu, and by separating the valuable-metal containing solution from the solid leach residue.
When the leach is carried out by introducing an oxygen-bearing gas into the slurry which contains finely-divided sulfide and carbon, the acidity of the slurry drops in a controlled manner so that a high efficiency of oxygen, and a high selectivity of the leach as regards valuable metals, are obtained. Owing to the presence of carbon the oxygen is reduced very easily and so oxygen efficiency is high and the rate of dissolving of the valuable metals increases in the slurry mixture.
REFERENCES:
patent: 2898197 (1959-08-01), Forward et al.
patent: 4192851 (1980-03-01), Husch et al.
patent: 4276266 (1981-06-01), Brum et al.
patent: 4343773 (1982-10-01), Miller et al.
Carter Herbert T.
Outokumpu Oy
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