Apparatus for selective reduction of metallic oxides
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United States of America Patent
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Sep 11, 1984
Issued Date -
N/A
app pub date -
Jan 20, 1983
filing date -
Jan 29, 1981
priority date (Note) -
Expired
status (Latency Note)
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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.
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