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 = {2013},
month = {9}
}
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