首页|Preface to the Special Issue on 'Challenges to Comprehension for Phenomena of Degradation, Softening, and Melting of Raw Materials in Hydrogen-enriched Ironmaking Process'
Preface to the Special Issue on 'Challenges to Comprehension for Phenomena of Degradation, Softening, and Melting of Raw Materials in Hydrogen-enriched Ironmaking Process'
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The global steel industry is currently making a bold transition toward decarbonization and carbon neutrality, driven by worldwide initiatives to mitigate climate change. In this context, hydrogen-based ironmaking has emerged as a key technology for reducing CO_2 emissions. At the same time, however, the introduction of hydrogen as a reductant has highlighted new issues related to raw materials, particularly the degradation (powdering), softening, and melting that can occur under high-temperature conditions in the furnace. Although these phenomena may resemble certain aspects of conventional CO-based ironmaking, research shows that hydrogen enrichment can alter both the onset and severity of powdering and melting. Consequently, both fundamental scientific understanding and applied engineering solutions are necessary to ensure stable operations in hydrogen-enriched processes.
Ko-ichiro OHNO
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Department of Materials, Faculty of Engineering, Kyushu University, 744 Motooka Nishi-ku Fukuoka, 819-0395 Japan
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