Method and apparatus for selective reduction of metallic oxides

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

C - Chemistry, Metallurgy

22

B

53/299, 53/32, 3

C22B 23/02 (2006.01) C21B 13/00 (2006.01) C22B 5/12 (2006.01)

Patent

CA 1175659

ABSTRACT Ores which include in combination iron oxide, cobalt oxide and nickel oxide are treated in a continuous shaft reduction ?urnace 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.

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