Production of iron from metallurgical waste
Patent
·
OSTI ID:1093553
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.
- Research Organization:
- Nu-Iron Technology, LLC (Charlotte, NC)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FG36-05GO15185
- Assignee:
- Nu-Iron Technology, LLC (Charlotte, NC)
- Patent Number(s):
- 8,535,411
- Application Number:
- 13/187,937
- OSTI ID:
- 1093553
- Country of Publication:
- United States
- Language:
- English
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