2017年
Chemical state mapping of heterogeneous reduction of iron ore sinter
X-RAY MICROSCOPY CONFERENCE 2016 (XRM 2016)
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- 巻
- 849
- 号
- 開始ページ
- 012015
- 終了ページ
- 記述言語
- 英語
- 掲載種別
- 研究論文(国際会議プロシーディングス)
- DOI
- 10.1088/1742-6596/849/1/012015
- 出版者・発行元
- IOP PUBLISHING LTD
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: Fe-III, Fe-II, and Fe-0 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.
- リンク情報
- ID情報
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- DOI : 10.1088/1742-6596/849/1/012015
- ISSN : 1742-6588
- Web of Science ID : WOS:000412800900015