A CFD Based Algorithm for Kinetics Analysis of the Reduction of Hematite Concentrate by H2 + CO Mixtures in a Drop Tube Reactor

• Published in: 8th International Symposium on High-Temperature Metallurgical Processing p. 2
• Main Authors: Fan, De-Qiu, Elzohiery, M., Mohassab, Y., Sohn, H. Y.
• Format: Book Chapter
• Language: English
• Published: Switzerland Springer Nature 2017; Springer International Publishing AG; Springer International Publishing
• Series: The Minerals, Metals & Materials Series
• Subjects: CFD; Concentrate particle; Flash reaction; General References; Ironmaking; Materials science; Metals & Metallurgy; Metals technology / metallurgy; Mineral Processing & Extractive Metallurgy; Mining Engineering & Extractive Metallurgy; Reduction kinetics; Testing of materials
• ISBN: 9783319513393; 3319513397
• ISSN: 2367-1181; 2367-1696
• DOI: 10.1007/978-3-319-51340-9_7

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 H2 + CO mixtures at 1150–1350 °C in a drop tube reactor. Rate expressions of hematite concentrate reduction by single gases (H2 or CO) were used in the analysis of the experimental data under H2 + CO mixtures. Synergistic effects, which were found in the H2 + 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.