Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1975-10-10
1979-01-23
Rutledge, L. Dewayne
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 1R, 75 3, 75 29, 75 82, 423138, C22B 2300
Patent
active
041359135
ABSTRACT:
Ferruginous sulfide minerals containing non-ferrous metal values, such as nickel and cobalt are treated to concentrate the non-ferrous metal values in metallic iron. An intimate admixture of finely-divided non-ferrous-metal-bearing ferruginous sulfide minerals, iron oxide, and a suitable reducing agent is maintained at a temperature between about 800.degree. C. and 1000.degree. C. in an atmosphere non-oxidizing to iron to produce a metallic iron alloy containing the non-ferrous metal values from the sulfide minerals. The heated admixture is cooled and the concentrated non-ferrous metal values in the iron alloy are recovered by magnetic separation or hydrocloning.
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patent: 3388870 (1968-06-01), Thumm et al.
patent: 3656935 (1972-04-01), Iwasaki
patent: 3754896 (1973-08-01), Iwasaki
Chemical Abstracts, vol. 75, item 8728n, 1971.
Manuscript for Approval Letter; U.S. Dept. of Interior, 1/7/72 for Carriere, et al.
Letter of J. E. Lawver to Norwood B. Melcher of 6/30/71 from University of Minnesota.
Letter of Norwood B. Melcher to C. S. Simons, 7/20/71 from U.S. Dept. of Interior.
Letter of Warren McMahan to R. R. Wells of 1/7/72 from U.S. Dept. of Interior.
Letter of J. E. Lawver to R. B. Schulter of 1/31/72, from University of Minnesota.
Carriere, B. W., et al. et al. "A Roasting Process for Extracting Copper and Nickel from Suluth Gabbro", Annual Mining Symposium, Duluth, Minn. of Jan. 17-19, 1972; Published 5/12/72, pp. 1-9, 11-14.
Illis Alexander
Renzoni Louis S.
Leff Miriam W.
Lewis Michael L.
MacQueen Ewan C.
Rutledge L. Dewayne
The International Nickel Company Inc.
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