Method for reducing chromium containing raw material
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United States of America Patent
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Sep 11, 2012
Grant Date -
Feb 18, 2010
app pub date -
Aug 19, 2009
filing date -
Jan 7, 2003
priority date (Note) -
Expired
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Abstract
An object of the present invention is to provide a method for reducing a chromium-containing material at a high chromium reduction degree. In the method of the present invention, a mixture of a feedstock containing chromium oxide and a carbonaceous reductant is heated and reduced by radiation heating in a moving hearth furnace. The average rate of raising the temperature of the mixture in the reduction is preferably 13.96° C./s or higher in the period from the initiation of the radiation heating of the mixture until the mixture reaches 1,114° C.
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