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SYSTEM AND METHOD FOR PRODUCING METALLIC IRON

United States Patent Application

*** PATENT GRANTED ***
20120192679
8,790,442
A1
View the Complete Application at the US Patent & Trademark Office
A method of production of metallic iron nodules comprises assembling a hearth furnace having a moveable hearth comprising refractory material and having a conversion zone and a fusion zone, providing a hearth material layer comprising carbonaceous material on the refractory material, providing a layer of reducible material comprising and iron bearing material arranged in discrete portions over at least a portion of the hearth material layer, delivering oxygen gas into the hearth furnace to a ratio of at least 0.8:1 ponds of oxygen to pounds of iron in the reducible material to heat the conversion zone to a temperature sufficient to at least partially reduce the reducible material and to heat the fusion zone to a temperature sufficient to at least partially reduce the reducible mate.pi.al, and heating the reducible material to form one or more metallic iron nodules and slag.
Englund, David J. (Bovey, MN), Schlichting, Mark (Crawfordsville, IN), Meehan, John (Conway, AR), Crouch, Jeremiah (Conway, AR), Wilson, Logan (Hot Springs, AR)
NU-IRON TECHNOLOGY, LLC (Charlotte NC)
13/ 499,152
September 29, 2010
GOVERNMENT INTERESTS [0002] The present invention was made with support by the Department of Energy, Sponsor Award DE-FG36-05GO15185. The United States government may have certain rights in the invention.