System and method for producing metallic iron

Bleifuss, Rodney L; Englund, David J; Iwasaki, Iwao; Fosnacht, Donald R; Brandon, Mark M; True, Bradford G

Title: System and method for producing metallic iron

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Abstract

A hearth furnace for producing metallic iron material has a furnace housing having a drying/preheat zone, a conversion zone, a fusion zone, and optionally a cooling zone, the conversion zone is between the drying/preheat zone and the fusion zone. A moving hearth is positioned within the furnace housing. A hood or separation barrier within at least a portion of the conversion zone, fusion zone or both separates the fusion zone into an upper region and a lower region with the lower region adjacent the hearth and the upper region adjacent the lower region and spaced from the hearth. An injector introduces a gaseous reductant into the lower region adjacent the hearth. A combustion region may be formed above the hood or separation barrier.

Inventors:: Bleifuss, Rodney L; Englund, David J; Iwasaki, Iwao; Fosnacht, Donald R; Brandon, Mark M; True, Bradford G

Issue Date:: 2013-09-17

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

Sponsoring Org.:: USDOE

OSTI Identifier:: 1093548

Patent Number(s):: 8535602

Application Number:: 13/351,742

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

Patent Classifications (CPCs):: F - MECHANICAL ENGINEERING F27 - FURNACES F27B - FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL

C - CHEMISTRY C22 - METALLURGY C22B - PRODUCTION AND REFINING OF METALS

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F - MECHANICAL ENGINEERING F27 - FURNACES F27B - FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL
F27B9/36 - Arrangements of heating devices
F27B9/26 - on or in trucks, sleds, or containers

C - CHEMISTRY C22 - METALLURGY C22B - PRODUCTION AND REFINING OF METALS
C22B5/10 - by solid carbonaceous reducing agents
C22B1/212 - in tunnel furnaces

F - MECHANICAL ENGINEERING F27 - FURNACES F27B - FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL
F27B9/3005 - {arrangements for circulating gases}

C - CHEMISTRY C22 - METALLURGY C22B - PRODUCTION AND REFINING OF METALS
C22B1/245 - with carbonaceous material for the production of coked agglomerates

C - CHEMISTRY C21 - METALLURGY OF IRON C21C - PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL
C21C2100/02 - Treatment of the exhaust gas

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
Y02P10/134 - by CO2 avoidance

C - CHEMISTRY C21 - METALLURGY OF IRON C21B - MANUFACTURE OF IRON OR STEEL
C21B13/10 - in hearth-type furnaces
C21B13/0073 - {Selection or treatment of the reducing gases}

F - MECHANICAL ENGINEERING F27 - FURNACES F27B - FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL
F27B9/045 - {Furnaces with controlled atmosphere}

C - CHEMISTRY C21 - METALLURGY OF IRON C21C - PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL
C21C5/567 - {operating in a continuous way}

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DOE Contract Number:: FG36-05GO15185

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE

Citation Formats


                    Bleifuss, Rodney L, Englund, David J, Iwasaki, Iwao, Fosnacht, Donald R, Brandon, Mark M, and True, Bradford G. System and method for producing metallic iron.  United States: N. p., 2013. 
        Web.

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                    Bleifuss, Rodney L, Englund, David J, Iwasaki, Iwao, Fosnacht, Donald R, Brandon, Mark M, & True, Bradford G. System and method for producing metallic iron.  United States.

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                    Bleifuss, Rodney L, Englund, David J, Iwasaki, Iwao, Fosnacht, Donald R, Brandon, Mark M, and True, Bradford G. Tue .  
        "System and method for producing metallic iron".  United States.  https://www.osti.gov/servlets/purl/1093548.

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@article{osti_1093548,

  title        = {System and method for producing metallic iron},

  author       = {Bleifuss, Rodney L and Englund, David J and Iwasaki, Iwao and Fosnacht, Donald R and Brandon, Mark M and True, Bradford G},

  abstractNote = {A hearth furnace for producing metallic iron material has a furnace housing having a drying/preheat zone, a conversion zone, a fusion zone, and optionally a cooling zone, the conversion zone is between the drying/preheat zone and the fusion zone. A moving hearth is positioned within the furnace housing. A hood or separation barrier within at least a portion of the conversion zone, fusion zone or both separates the fusion zone into an upper region and a lower region with the lower region adjacent the hearth and the upper region adjacent the lower region and spaced from the hearth. An injector introduces a gaseous reductant into the lower region adjacent the hearth. A combustion region may be formed above the hood or separation barrier.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2013},

  month        = {9}

}

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