Non-ferrous metal recovery from deep sea nodules

Details Non-ferrous metal recovery from deep sea nodules Non-ferrous metal recovery from deep sea nodules

1975-02-14

1977-09-20

Andrews, M. J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 74, 75 80, 75 82, 75 84, 75101R, 423 48, 423 49, 423 53, 423138, 423561R, 423417, C21B 100

Patent

active

040494381

ABSTRACT:
Manganiferous deep sea nodules containing non-ferrous metal values are selectively reduced to reduce manganic oxides to manganous oxide (MnO) and the non-ferrous metal values to the metallic state, and the selectively reduced nodules are then smelted to produce a molten metallic alloy containing the non-ferrous metal values and a slag containing most of the manganese. The molten alloy is blown with a free-oxygen-containing gas to eliminate most of the manganese, and the substantially manganese-free metal is then sulfided to produce a matte suitable for separation and recovery of the non-ferrous metal values. After sulfiding the matte can be blown with a free-oxygen-containing gas to lower the iron content thereof. Not all the iron is removed if it is advantageous to keep a high proportion of cobalt in the matte.

REFERENCES:
patent: 1927240 (1933-09-01), Lofquist
patent: 3030201 (1962-04-01), Queneau et al.
patent: 3751554 (1973-08-01), Bare et al.
Beck et al., Proceedings of AIME Copper Metallurgy pp. 70-82, 1970.
Nagaya et al., 79 Chem. Abstracts 128254; 1973.

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