Method for producing iron carbide from granulated sponge iron
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United States of America Patent
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Sep 30, 2003
Grant Date -
May 23, 2002
app pub date -
Mar 15, 2000
filing date -
Apr 24, 1997
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Expired
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Abstract
Process for producing Iron carbide wherein, in a first stage, Iron ore is reduced to sponge iron using a reducing gas containing at least 90% hydrogen, on a nitrogen-free basis, to produce a sponge iron having a carbon content of less than 1% wt.; then in a second stage the sponge iron is fluidized at a temperature of 500 to 800.degree. C. with a methane-containing fluidizing gas in a fluidized bed reactor wherein the water content of the gas in the reactor is not more than 1.5% wt., to produce a product wherein at least 85% of the iron content is in the form of Fe.sub.3 C.
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