Journal
8TH INTERNATIONAL SYMPOSIUM ON HIGH-TEMPERATURE METALLURGICAL PROCESSING
Volume -, Issue -, Pages 61-70Publisher
SPRINGER INTERNATIONAL PUBLISHING AG
DOI: 10.1007/978-3-319-51340-9_7
Keywords
Flash reaction; Concentrate particle; Reduction kinetics; Ironmaking; CFD
Funding
- American Iron and Steel Institute (AISI)
- University of Utah under AISI's CO2 Breakthrough Program
- U.S. Department of Energy [DE-EE0005751]
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A novel flash ironmaking process is under development at the University of Utah. A computational fluid dynamics (CFD) approach, coupled with experimental results, was developed for the analysis of the kinetics of reduction of hematite concentrate by H-2 + CO mixtures at 1150-1350 degrees C in a drop tube reactor. Rate expressions of hematite concentrate reduction by single gases (H-2 or CO) were used in the analysis of the experimental data under H-2 + CO mixtures. Synergistic effects, which were found in the H-2 + CO mixture experiments compared with simple summation of contributions of component gases, was considered in this paper. The gas phase was treated as a continuum in the Eulerian frame of reference, and the particles are tracked using a Lagrangian approach in the evaluation of the particle residence time and temperature profile inside the reactor. The calculated reduction degrees based on this approach are in good agreement with the experimental values.
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