Numerical Analysis of the Dust Control Performance of a Counter-current Swirling Configuration in the Flash Ironmaking Reactor

Flash ironmaking technology (FIT) is a potential alternative process reducing energy consumption and environmental pollution. The newly proposed counter-current flash has more reasonable temperature concentration distribution, while the high dust rate cannot be avoided. In this study, swirling configuration was introduced to improve control performance. A comprehensive computational fluid dynamics (CFD) model, including gas-particle motion, chemical reactions, particle-wall sticking, slag movement, wall reaction, adopted investigate velocity vector, temperature, species distribution under flow. effects of initial particle (IPV) swirl angle (SAV) were analyzed as crucial parameters. results show that an annular updraft-center downdraft structure formed by flow, particles are pushed centrifugal force, adhere high-temperature wall, flow down slowly with molten slag. non-swirl cases, increase IPV can effectively inhibit escaping ratio from 62.5% 22.4% amount leaving bottom directly lower reduction degree. Therefore, necessary enhances probability adhesion when SAV over varying critical value related IPV. Also, long residence time in increases degree captured 94.3% 100%. increased 83.3% 87.3% single-cycle reaction.