Improving Carburization Efficiency Using Biomass Gasification

초록

Global steel companies are undergoing a transition from production methods based on coal and natural gas to hydrogen-based systems with the objective of achieving carbon neutrality. The steel industry is a significant contributor to greenhouse gas emissions, which are directly associated with the utilization of fossil fuel-based reductants. The substitution of hydrogen for fossil fuel-based reductants has the potential to reduce CO emissions from reduction reactions. However, carbon is not solely employed as a reductant; it also serves as a crucial alloying element, influencing the characteristics of the final steel product. In particular, it plays a significant role in regulating the melting characteristics of reduced iron. It is, therefore, not feasible to completely exclude the use of carbon. In this study, biomass gasification, which does not generate a carbon footprint of product(CFP), was employed as a means of achieving carbon neutrality in the context of carburization technology. The carbonization of hydrogen-reduced iron ore pellets was conducted using biomass gas, and the impact of carbon content and form (cementite/ graphite) was examined in accordance with the influencing factors associated with carbonization. The conditions were optimized in a manner that not only permits an increase in carbon content but also maximizes the cementite(Fe<inf>3</inf>C) form, which represents the effective carburizing structure. © 2025 Proceedings - ICSTI 2025: 10th International Congress on the Science and Technology of Ironmaking. All rights reserved.

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