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Title: System and method for producing metallic iron

Abstract

A hearth furnace 10 for producing metallic iron material has a furnace housing 11 having a drying/preheat zone 12, a conversion zone 13, a fusion zone 14, and optionally a cooling zone 15, the conversion zone 13 is between the drying/preheat zone 12 and the fusion zone 14. A moving hearth 20 is positioned within the furnace housing 11. A hood or separation barrier 30 within at least a portion of the conversion zone 13, fusion zone 14 or both separates the fusion zone 14 into an upper region and a lower region with the lower region adjacent the hearth 20 and the upper region adjacent the lower region and spaced from the hearth 20. An injector introduces a gaseous reductant into the lower region adjacent the hearth 20. A combustion region may be formed above the hood or separation barrier.

Inventors:
 [1];  [2];  [1];  [3];  [4];  [4]
  1. Grand Rapids, MN
  2. Bovey, MN
  3. Hermantown, MN
  4. Charlotte, NC
Issue Date:
Research Org.:
Univ. of Minnesota, Minneapolis, MN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1035032
Patent Number(s):
8097065
Application Number:
12/418,037
Assignee:
Nu-Iron Technology, LLC (Charlotte, NC)
Patent Classifications (CPCs):
C - CHEMISTRY C21 - METALLURGY OF IRON C21B - MANUFACTURE OF IRON OR STEEL
C - CHEMISTRY C21 - METALLURGY OF IRON C21C - PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL
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., 2012. Web.
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.
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/1035032.
@article{osti_1035032,
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 10 for producing metallic iron material has a furnace housing 11 having a drying/preheat zone 12, a conversion zone 13, a fusion zone 14, and optionally a cooling zone 15, the conversion zone 13 is between the drying/preheat zone 12 and the fusion zone 14. A moving hearth 20 is positioned within the furnace housing 11. A hood or separation barrier 30 within at least a portion of the conversion zone 13, fusion zone 14 or both separates the fusion zone 14 into an upper region and a lower region with the lower region adjacent the hearth 20 and the upper region adjacent the lower region and spaced from the hearth 20. An injector introduces a gaseous reductant into the lower region adjacent the hearth 20. A combustion region may be formed above the hood or separation barrier.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {1}
}