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Title: 水素還元によって得られた純鉄中の不純物の熱力学
Other Titles: Thermodynamics of Impurities in Pure Iron Obtained by Hydrogen Reduction
Authors: 柏谷, 悦章1 Browse this author →KAKEN DB
長谷川, 将克2 Browse this author
Authors(alt): Kashiwaya, Yoshiaki1
Hasegawa, Masakatsu2
Keywords: hydrogen reduction
clean steel
thermodynamic study of inclusion
direct steelmaking
Issue Date: Feb-2014
Publisher: 日本鉄鋼協会
Journal Title: 鉄と鋼
Volume: 100
Issue: 2
Start Page: 302
End Page: 311
Publisher DOI: 10.2355/tetsutohagane.100.302
Abstract: Hydrogen itself is not a primary energy and needs an energy for its production, which means that CO2 will be exhausted during the production process, more or less. However, when a Green Hydrogen can be produced, it is a best way to use the hydrogen instead of carbon. In this study, two kinds of iron ore were reduced and melted both under hydrogen and carbon atmosphere. The obtained iron metal under hydrogen atmosphere was quite pure one. The impurities in the metal were chemically and thermodynamically analyzed. The characteristics and benefits of hydrogen reduction were discussed in comparison with the carbon reduction. The content of silicon in the metal under hydrogen atmosphere was one tenth to the iron obtained by carbon reduction. Manganese was about one third to one tenth against the carbon reduction. However, phosphorus in the hydrogen reduction was almost the same level to the carbon reduction. Sulfur content became half in the hydrogen reduction. Moreover, the content of hydrogen in the metal was the same level between the hydrogen reduction and the carbon reduction. It was found that the rate of hydrogen evolution from a molten metal during solidification was fast significantly. The activities of elements in the metal were calculated through the thermochemical data, and the relationships among those elements were elucidated. From the thermodynamic analysis, a high oxygen activity in the metal obtained under hydrogen atmosphere caused to a low content of impurities and high activity of oxides related.
Rights: 著作権は日本鉄鋼協会にある
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 柏谷 悦章

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