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:
Oct. 14, 2014
Filed:
Sep. 28, 2010
Richard F. Kiesel, Hibbing, MN (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);
Richard F. Kiesel, Hibbing, MN (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 and system for making metallic iron nodules with reduced COemissions is disclosed. The method includes: assembling a linear hearth furnace having entry and exit portions, at least a conversion zone and a fusion zone, and a moving hearth adapted to move reducible iron bearing material through the furnace on contiguous hearth sections; assembling a shrouded return substantially free of air ingress extending adjacent at least the conversion and fusion zones of the furnace through which hearth sections can move from adjacent the exit portion to adjacent the entry portion of the furnace; transferring the hearth sections from the furnace to the shrouded return adjacent the exit portion; reducing reducible material in the linear hearth furnace to metallic iron nodules; and transporting gases from at least the fusion zone to the shrouded return to heat the hearth sections while in the shrouded return.