Treating deep sea nodules by segregation roasting

Details Treating deep sea nodules by segregation roasting Treating deep sea nodules by segregation roasting

1982-05-20

1983-09-06

Hearn, Brian E.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 72, 75 80, 75 82, 423DIG4, C22B 102, C22B 510

Patent

active

044027354

ABSTRACT:
A process for recovering nonferrous nickel, copper and cobalt from deep sea nodules to obtain a concentrate rich in the nonferrous metals, a middlings less concentrated in the nonferrous metals and a tailings with a very low concentration of the nonferrous metals. The crushed nodules are mixed with middlings, a carbonaceous reductant and a chlorinating agent which is a mixture of sodium chloride with either calcium carbonate or calcium hydroxide. In a non-oxidizing atmosphere, the mixture is roasted at a temperature about 850.degree. C. and then cooled. The roasted material is finely ground, slurried and magnetically separated into the three fractions.

REFERENCES:
patent: 3725039 (1973-04-01), Jepsen
patent: 3754896 (1973-08-01), Iwasaki
patent: 3984232 (1976-10-01), Bell
patent: 4002463 (1977-01-01), Nestoridis
Chemical Abstracts, vol. 83 (1975) No. 101,167.
Mining Engineering, Apr. 1975, pp. 53-55.
Derwent Abstract, 76600X/41 (1976) of Japanese Pat. No. 96,724.

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