Process for producing reduced iron pellets, and process for producing pig iron
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United States of America Patent
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May 19, 2015
Grant Date -
Feb 3, 2011
app pub date -
Sep 11, 2008
filing date -
Sep 14, 2007
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Abstract
In a method for producing a reduced iron pellet, when a powder formed article including iron oxide and carbon is heated and reduced in a rotary hearth furnace, a formed article produced using a raw material, in which an average diameter of the iron oxide is 50 microns or less and a ratio of carbon monoxide to carbon dioxide in a reduction zone is from 0.3 to 1, is reduced at a temperature of 1400° C. or less, thereby producing a reduced iron pellet in which a metallization ratio of iron is 50 to 85% and a ratio of residual carbon is 2% or less.
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