Chemical state mapping of heterogeneous reduction of iron ore sinter

M. Kimura, Y. Takeichi, R. Murao, I. Obayashi, Y. Hiraoka, Y. Liu

研究成果: Conference article査読

1 被引用数 (Scopus)


Iron ore sinter constitutes the major component of the iron-bearing burden in blast furnaces, and its reduction mechanism is one of the keys to improving the productivity of ironmaking. Iron ore sinter is composed of multiple iron oxide phases and calcium ferrites (CFs), and their heterogeneous reduction was investigated in terms of changes in iron chemical state: FeIII, FeII, and Fe0 were examined macroscopically by 2D X-ray absorption and microscopically by 3D transmission X-ray microscopy (TXM). It was shown that the reduction starts at iron oxide grains rather than at calcium ferrite (CF) grains, especially those located near micropores. The heterogeneous reduction causes crack formation and deteriorates the mechanical strength of the sinter. These results help us to understand the fundamental aspects of heterogeneous reduction schemes in iron ore sinter.

ジャーナルJournal of Physics: Conference Series
出版ステータスPublished - 2017 6 14
イベント13th International X-ray Microscopy Conference, XRM 2016 - Oxford, United Kingdom
継続期間: 2016 8 152016 8 19

ASJC Scopus subject areas

  • 物理学および天文学(全般)


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