Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1975-01-28
1976-05-04
Ozaki, G.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 74, 75101R, 75117, 75119, 75115, 75121, C22B 106, C22B 2304, C22B 1500
Patent
active
039544486
ABSTRACT:
A process for recovering cobalt as cobalt sulfate solution from cobaltiferous material comprising reducing and smelting oxidized cobaltiferous material rich in iron to extract cobalt as an alloy containing cobalt and iron, which is a neat alloy or an alloy dissolved in a matte, leaving most of the iron in the resultant slag as the first step; converting the cobalt and iron in the alloy into sulfate by treating the alloy, after granulating the pure alloy or pulverizing the mixture of alloy and matte, with copper sulfate and water as the second step; and calcining the resultant mixture containing the sulfates to decompose the iron sulfate selectively into oxide, leaching the resultant calcine to extract cobalt as cobalt sulfate solution, and leaving iron as leach residue as the third step.
REFERENCES:
patent: 3544306 (1970-12-01), McGauley
patent: 3616331 (1971-10-01), O'Neill et al.
patent: 3637372 (1972-01-01), Mayor et al.
patent: 3684489 (1972-08-01), Emicke et al.
patent: 3809624 (1974-05-01), Kane et al.
Ozaki G.
Sumitomo Metal Mining Co. Limited
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