We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Numerical Analysis of Flash Ironmaking Process in a Newly Proposed Counter-Current Downer.
- Authors
Yang, Yiru; Shen, Zhongjie; Xu, Jianliang; Liu, Haifeng
- Abstract
A counter-current downer is proposed as a new structure to improve the flash ironmaking technology (FIT). A computational fluid dynamics (CFD) model was established to predict the dilute gas–particle reacting flow, and a core–annulus structure was observed. Furthermore, counter-current and cocurrent downers have been compared in similar conditions. As a result, reduced iron of the counter-current downer had a higher reduction degree (99.8%) than that of the cocurrent downer (70.1%). The first two reaction steps (Fe2O3 → Fe3O4 and F3O4 → FeO) were swift, while the subsequent step (FeO → Fe) in the counter-current downer showed a significant difference due to the preponderant reduction potential and temperature. Different gas velocities (0.167–0.667 m/s) were also investigated, and the high-speed gas flow brought more particles with decreasing metal yield from 89.3% to 27.5%. However, more gas amounts always led to a higher reduction degree separately of captured and escaped particles.
- Subjects
NUMERICAL analysis; COMPUTATIONAL fluid dynamics; REDUCTION potential; IRON
- Publication
JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2022, Vol 74, Issue 4, p1499
- ISSN
1047-4838
- Publication type
Article
- DOI
10.1007/s11837-021-05003-3