System and method for making metallic iron with reduced CO.sub.2 emissions

Title: System and method for making metallic iron with reduced CO.sub.2 emissions

A method and system for making metallic iron nodules with reduced CO.sub.2 emissions 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.

Inventors:: Kiesel, Richard F; Englund, David J; Schlichting, Mark; Meehan, John; Crouch, Jeremiah; Wilson, Logan

Issue Date:: 2014-10-14

OSTI Identifier:: 1159972

Assignee:: Nu-Iron Technology, LLC (Charlotte, NC) GFO

Patent Number(s):: 8,858,678

Application Number:: 13/499,021

Contract Number:: FG36-05GO15185

Resource Relation:: Patent File Date: 2010 Sep 28

Research Org:: Nu-Iron Technology, LLC, Charlotte, NC (United States)

Sponsoring Org:: USDOE

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE

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Other works cited in this record:

High Temperature Electrolysis For Syngas Production
patent-application, January 2008

Stoots, Carl; O'Brien, James; Herring, James
US Patent Application 11/461337; 20080023338
URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.html&r=1&f=G&l=50&s1=%2220080023338%22.PGNR.&OS=DN/20080023338&RS=DN/20080023338

Advances in CO₂ capture technology—The U.S. Department of Energy's Carbon Sequestration Program
journal, January 2008

Figueroa, José D.; Fout, Timothy; Plasynski, Sean
International Journal of Greenhouse Gas Control, Vol. 2, Issue 1, p. 9-20
DOI: 10.1016/S1750-5836(07)00094-1

Impurity impacts on the purification process in oxy-fuel combustion based CO₂ capture and storage system
journal, February 2009

Li, H.; Yan, J.; Yan, J.
Applied Energy, Vol. 86, Issue 2, p. 202-213
DOI: 10.1016/j.apenergy.2008.05.006

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