首页|Mineral Phase Ratio of MEBIOS Sinter and its deducibility under Blast Furnace Condition with High Hydrogen Concentration

Mineral Phase Ratio of MEBIOS Sinter and its deducibility under Blast Furnace Condition with High Hydrogen Concentration

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For decreasing carbon dioxide emission from iron- and steelmaking industry, hydrogen utilization in the blast furnace has been considered. Iron ore sinter is one of the major iron sources for the blast furnace. It is known that the effects of the hydrogen concentration in the reducing gas on the reducibility and reduction disintegration of the sinter are strong. In this study, the evaluation of the mineral phase of the Mosaic EmBedding Iron Ore Sintering (MEBIOS) sinter and reducibility using a laboratory scale furnace simulated the blast furnace condition with high hydrogen concentration and the experimental blast furnace were carried out. MEBIOS sinter has higher ratio of the mineral phases, i.e., hematite and acicular calcium ferrite with primary hematite, showing higher reducibility compared to the conventional sinters. The value of JIS-RDI of the MEBIOS sinter decreases with an increase in that of JIS-RI, which is the reverse trend of the conventional sinter. Further, the basket charge test with the experimental blast furnace confirmed that the MEBIOS sinter shows high reducibility under the condition of high hydrogen concentration while the reduction disintegration behavior at low temperature is similar to conventional sinter.

hydrogenreductionMEBIOScalcium ferriteexperimental blast furnace

Taichi MURAKAMI、Yuki MOTOMURA、Daisuke MARUOKA、Kohei SUNAHARA、Takeshi SATO、Eiki KASAI

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Graduate School of Environmental Studies, Tohoku University, 6-6-02, Aoba, Aramaki, Aoba-ku, Sendai, Miyagi, 980-8579 Japan

Graduate School of Environmental Studies, Tohoku University. Now at Sumitomo Metal Mining CO., LTD., 145-1, Funaya-Aza-Shinchi-Otu, Saijyo, Ehime, 793-0005 Japan

Graduate School of Environmental Studies, Tohoku University. Now at Material and Biological Engineering Course, National Institute of Technology, Hachinohe College, 16-1, Uwanotai, Tamonoki, Hachinohe, Aomori, 039-1192 Japan

Experimental Blast Furnace Project Division, Process Research Laboratories Nippon Steel Corporation, Experimental BF office, 1 Kimitsu, Kimitsu-shi, Chiba, 299-1141 Japan

Advanced Reduction Process Development Dept., JFE Steel Corporation, 2-3 Uchisaiwai-cho, 2-chome, Chiyoda-ku, Tokyo, 100-0011 Japan

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2025

10.2355/isijinternational.ISIJINT-2024-347

ISIJ international

ISIJ international

ISSN：0915-1559
年,卷(期)：2025.65(6)