Production of iron from metallurgical waste
Abstract
A method of recovering metallic iron from iron-bearing metallurgical waste in steelmaking comprising steps of providing an iron-bearing metallurgical waste containing more than 55% by weight FeO and FeO equivalent and a particle size of at least 80% less than 10 mesh, mixing the iron-bearing metallurgical waste with a carbonaceous material to form a reducible mixture where the carbonaceous material is between 80 and 110% of the stoichiometric amount needed to reduce the iron-bearing waste to metallic iron, and as needed additions to provide a silica content between 0.8 and 8% by weight and a ratio of CaO/SiO.sub.2 between 1.4 and 1.8, forming agglomerates of the reducible mixture over a hearth material layer to protect the hearth, heating the agglomerates to a higher temperature above the melting point of iron to form nodules of metallic iron and slag material from the agglomerates by melting.
- Inventors:
- Issue Date:
- Research Org.:
- Nu-Iron Technology, LLC (Charlotte, NC)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1093553
- Patent Number(s):
- 8535411
- Application Number:
- 13/187,937
- Assignee:
- Nu-Iron Technology, LLC (Charlotte, NC)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C21 - METALLURGY OF IRON C21B - MANUFACTURE OF IRON OR STEEL
C - CHEMISTRY C22 - METALLURGY C22B - PRODUCTION AND REFINING OF METALS
- DOE Contract Number:
- FG36-05GO15185
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Citation Formats
Hendrickson, David W, and Iwasaki, Iwao. Production of iron from metallurgical waste. United States: N. p., 2013.
Web.
Hendrickson, David W, & Iwasaki, Iwao. Production of iron from metallurgical waste. United States.
Hendrickson, David W, and Iwasaki, Iwao. Tue .
"Production of iron from metallurgical waste". United States. https://www.osti.gov/servlets/purl/1093553.
@article{osti_1093553,
title = {Production of iron from metallurgical waste},
author = {Hendrickson, David W and Iwasaki, Iwao},
abstractNote = {A method of recovering metallic iron from iron-bearing metallurgical waste in steelmaking comprising steps of providing an iron-bearing metallurgical waste containing more than 55% by weight FeO and FeO equivalent and a particle size of at least 80% less than 10 mesh, mixing the iron-bearing metallurgical waste with a carbonaceous material to form a reducible mixture where the carbonaceous material is between 80 and 110% of the stoichiometric amount needed to reduce the iron-bearing waste to metallic iron, and as needed additions to provide a silica content between 0.8 and 8% by weight and a ratio of CaO/SiO.sub.2 between 1.4 and 1.8, forming agglomerates of the reducible mixture over a hearth material layer to protect the hearth, heating the agglomerates to a higher temperature above the melting point of iron to form nodules of metallic iron and slag material from the agglomerates by melting.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Sep 17 00:00:00 EDT 2013},
month = {Tue Sep 17 00:00:00 EDT 2013}
}
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.
Works referenced in this record:
Processing electric arc furnace dust through a basic oxygen furnace
patent, May 2003
- Price, Kenneth; Lenti, Kim
- US Patent Document 6,562,101
Method and system for producing metallic iron nuggets
patent, December 2009
- Iwasaki, Iwao; Lalich, Michael J.; Beaudin, Robert C.
- US Patent Document 7,628,839
Method and system for producing metallic iron nuggets
patent, April 2010
- Iwasaki, Iwao; Lalich, Michael J.; Beaudin, Robert C.
- US Patent Document 7,695,544
Recycling of CIS photovoltaic waste
patent, July 1998
- Drinkard, Jr., William F.; Long, Mark O.; Goozner, Robert E.
- US Patent Document 5,779,877
Separation of calcium from metal compounds
patent, November 1999
- Drinkard, Jr., William F.; Woerner, Hans J.
- US Patent Document 5,980,842
System and method for producing metallic iron nodules
patent, September 2011
- Bleifuss, Rodney L.; Englund, David J.; Iwasaki, Iwao
- US Patent Document 8,021,460
Nitric acid production and recycle
patent, July 2001
- Drinkard, Jr., William F.
- US Patent Document 6,264,909
Method and system for producing metallic iron nuggets
patent, April 2012
- Iwasaki, Iwao; Lalich, Michael J.; Beaudin, Robert C.
- US Patent Document 8,158,054
Method and system for producing metallic iron nuggets
patent, December 2009
- Iwasaki, Iwao; Lalich, Michael J.; Beaudin, Robert C.
- US Patent Document 7,632,335
Assemblies and methods for processing zinc-bearing materials
patent, January 2004
- Frame, Scott W.; Wilson, Shannon; Bratina, James E.
- US Patent Document 6,682,586
Method of producing metallic iron
patent, October 2003
- Ito, Shuzo; Tanigaki, Yasuhiro; Kikuchi, Shoichi
- US Patent Document 6,630,010
Recycling of CdTe photovoltaic waste
patent, April 1999
- Goozner, Robert E.; Long, Mark O.; Drinkard, Jr., William F.
- US Patent Document 5,897,685
Method and system for producing metallic iron nuggets
patent, January 2010
- Iwasaki, Iwao; Lalich, Michael J.; Beaudin, Robert C.
- US Patent Document 7,641,712
Metallurgical dust recycle process
patent, June 1999
- Drinkard, Jr., William F.; Woerner, Hans J.
- US Patent Document 5,912,402
Recycling of CdTe photovoltaic waste
patent, December 1999
- Goozner, Robert E.; Long, Mark O.; Drinkard, Jr., William F.
- US Patent Document 5,997,718
Management of electric arc furnace dust through a basic oxygen furnace
patent, May 2003
- Price, Kenneth; Lenti, Kim
- US Patent Document 6,562,096
Dual use of an induction furnace to produce hot metal or pig iron while processing iron and volatile metal containing materials
patent, December 2004
- Bratina, James E.; Fehsenfeld, Sr., Fred M.
- US Patent Document 6,831,939