Desulfurization of High-Sulfur HIsarna Hot Metal
Frank N.H. Schrama (Tata Steel, TU Delft - Mechanical Engineering)
Elisabeth M. Beunder (Tata Steel)
Ali Emami (Tata Steel)
Chris M. Barnes (Tata Steel)
Johan W.K. van Boggelen (Tata Steel)
Jilt Sietsma (TU Delft - Mechanical Engineering)
Rob Boom (TU Delft - Mechanical Engineering)
Yongxiang Yang (TU Delft - Mechanical Engineering)
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Abstract
The HIsarna process is one of the emerging low-CO2 ironmaking processes that could help the steel industry in achieving their carbon footprint goals. HIsarna hot metal contains 3–4 times more sulfur than hot metal from blast furnaces (BFs). Therefore, a literature study, a thermodynamic analysis, and plant data analysis from Tata Steel, IJmuiden, are used herein to investigate the consequences of HIsarna hot metal for the current hot metal desulfurization process. Although the high sulfur concentration and low temperature of HIsarna hot metal lead to a higher total reagent consumption, compared with desulfurization of BF hot metal, the specific magnesium consumption decreases. The higher oxygen concentration in HIsarna hot metal only leads to a small increase in reagent consumption.
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