CFD modelling of the off-gas system HIsarna iron making process part 2

reflux chamber geometry modification and effects on flow behaviour

Journal article (2022)

Authors

A. Hosseini Team Yongxiang Yang - Mechanical, Maritime and Materials Engineering
Vinod Dhiman Tata Steel Europe Limited
Koen Meijer Tata Steel Europe Limited
Christiaan Zeilstra Tata Steel Europe Limited
Johannes Hage Tata Steel Europe Limited
Tim Peeters Tata Steel Europe Limited
S.E. Offerman Team Erik Offerman - Mechanical, Maritime and Materials Engineering
Y. Yang Team Yongxiang Yang - Mechanical, Maritime and Materials Engineering
Research Group
Team Yongxiang Yang (Mechanical, Maritime and Materials Engineering) (TU Delft)
Copyright: © 2022 A. Hosseini, Vinod Dhiman, Koen Meijer, Christiaan Zeilstra, Johannes Hage, Tim Peeters, S.E. Offerman, Y. Yang
DOI: https://doi.org/10.1080/03019233.2022.2060457
More Info
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Published Date

2022

Language

English

Faculty

Mechanical, Maritime and Materials Engineering

Department

Materials Science and Engineering

Research Group

Team Yongxiang Yang

Abstract

A three-dimensional computational fluid dynamics (CFD) model for the HIsarna off-gas system is set up and validated by real plant data. In the model detailed reaction mechanism and kinetic data for post-combustion of CO-H2 mixture and carbon particles are incorporated. The results are presented and discussed in another study (Part 1) by the same authors. In the present paper, the focus will be on geometry modification of the off-gas system and the effects on the operating parameters. The effect of this modification on heat loss, temperature profile, carbon conversion and gaseous phase composition across the off-gas system is investigated. It is shown that the modified geometry leads to a higher heat loss through the reflux chamber walls which can change the temperature profile and consequently species composition. The modified geometry also offers possibility of higher CO-H2 mixture and carbon particles conversion rate and reduce unwanted emission from the reflux chamber.