Method and plant for producing a reducing gas serving for the reduction of metal ore
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United States of America Patent
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Apr 30, 2002
Issued Date -
N/A
app pub date -
Jan 7, 1999
filing date -
Jul 10, 1996
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Abstract
In a method for producing a hot CO- and H.sub.2 -containing reducing gas serving for the reduction of fine-grained metal ore, in particular iron ore, the reducing gas is formed in a gasification zone by a gasification of carbon carriers, in particular coal, taking place under the supply of oxygen and subsequently is cooled down to a reducing-gas temperature favorable to the reduction process. In order to produce a thermodynamically more stable reducing gas, the reducing gas by the addition of H.sub.2 O and/or CO.sub.2 --in order to prevent the Boudouard and heterogeneous water-gas reaction and a resultant heating of the reducing gas--is converted to a reducing gas that is thermodynamically more stable at the reducing-gas temperature.
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