Method for selective reduction of metallic oxides

Details Method for selective reduction of metallic oxides Method for selective reduction of metallic oxides

1981-01-29

1983-05-03

Andrews, M. J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

C22B 2302

Patent

active

043819397

ABSTRACT:
Ores which include in combination iron oxide, cobalt oxide and nickel oxide are treated in a continuous shaft reduction furnace to selectively reduce nickel and cobalt to metallized form while leaving the iron oxide in the oxide form. Reacted top gas is recycled and mixed with partially combusted gasified fossil fuel in a combustion chamber to achieve the required concentration of reductants in the reducing gas. The cooling zone operates with a similar concentration of reductants in the cooling gas. Apparatus is also disclosed for carrying out the process.

REFERENCES:
patent: 2400098 (1946-05-01), Brogdon
patent: 2473795 (1949-06-01), Hills et al.
patent: 3318689 (1967-05-01), Zubryckyj et al.
patent: 4216011 (1980-08-01), Vera et al.

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