Apparatus for selective reduction of metallic oxides

Details Apparatus for selective reduction of metallic oxides Apparatus for selective reduction of metallic oxides

1983-01-20

1984-09-11

Andrews, M. J.

Metallurgical apparatus

With means treating or handling gases exhausted by treating...

With heat exchanger, e.g., waste heat boiler

266156, F27B 122

Patent

active

044705816

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: 2931720 (1960-04-01), Vaney
patent: 3375098 (1968-03-01), Marshall
patent: 3836131 (1974-09-01), Beggs

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