The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 29, 2014
Filed:
Sep. 29, 2010
David J. Englund, Bovey, MN (US);
Mark Schlichting, Crawfordsville, IN (US);
John Meehan, Conway, AR (US);
Jeremiah Crouch, Conway, AR (US);
Logan Wilson, Hot Springs, AR (US);
David J. Englund, Bovey, MN (US);
Mark Schlichting, Crawfordsville, IN (US);
John Meehan, Conway, AR (US);
Jeremiah Crouch, Conway, AR (US);
Logan Wilson, Hot Springs, AR (US);
Nu-Iron Technology LLC, Charlotte, NC (US);
Abstract
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 material, and heating the reducible material to form one or more metallic iron nodules and slag.