Iron oxide waste agglomerates and method of assisting a steel-making operation
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United States of America Patent
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Sep 17, 2002
Grant Date -
N/A
app pub date -
Apr 4, 2001
filing date -
Apr 6, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An iron oxide waste agglomerate, preferably a briquette, is provided including 0.03-15 weight percent on a dry basis lignosulfonate binder, 50-99.5 weight percent on a dry basis iron oxide waste, and 0.3-20 weight percent water. The agglomerate can further include 1-40 weight percent on a dry basis carbon source material such as carbon black, coke or coal. The briquette is heated in a furnace where the iron oxide waste is reduced to elemental iron. The binder is effective to prevent the briquettes from crumbling during the reducing opperation. The reduced iron briquette is then dropped into molten steel, thereby recycling iron oxide waste.
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