Method and apparatus for reducing particulate iron oxide to molten iron with solid reductant and oxy-fuel burners
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United States of America Patent
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Feb 3, 1981
Issued Date -
N/A
app pub date -
Jul 25, 1979
filing date -
Feb 16, 1977
priority date (Note) -
Expired
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Abstract
A method and apparatus for reducing particulate iron oxide to molten iron utilizing solid carbonaceous fuel as reductant in a shaft type reducing furnace, in which a furnace burden is formed of a mixture of iron oxide lumps or pellets and particulate solid fuel. Reacted top gas is upgraded and recirculated through the burden in counterflow relationship thereby heating and reducing the burden. The heat for reduction is generated by passing electric current through the burden. A portion of the heat for melting of reduced iron and a supplemental source of hot reducing gas is provided by oxy-fuel burners located in the shaft furnace above the molten iron pool.
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