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Title: 焼結鉱のAr-CO-H2混合ガス中昇温還元におよぼすH2濃度の影響
Other Titles: Influence of Hydrogen on Reduction of Iron Ore Sinter with Ar-CO-H2 Mixture under Heating-up Condition
Authors: 石井, 邦宜1 Browse this author
葛西, 直樹2 Browse this author
柏谷, 悦章3 Browse this author →KAKEN DB
近藤, 眞一4 Browse this author
Authors(alt): Ishii, Kuniyoshi1
Kasai, Naoki2
Kashiwaya, Yoshiaki3
Kondo, Shin-ichi4
Keywords: direct reduction
non-isothermal reduction
CO-H2 mixed gas
gas analysis
carbon deposition
water-gas shift reaction
Issue Date: 1-Sep-1987
Publisher: 日本鉄鋼協会
Journal Title: 鉄と鋼
Volume: 73
Issue: 11
Start Page: 1519
End Page: 1526
Publisher DOI: 10.2355/tetsutohagane1955.73.11_1519
Abstract: Iron are sinter was reduced in a graphite crucible with Ar70%-(CO + H2)30% gas mixtures and the effect of addition of H2 gas to Ar-CO gas mixtures on reduction was investigated during heating at constant rates. The process was followed by gas analysis. Apparent reduction rates with CO, H2 gases and C, and overall rate as the sum of those rates were separately calculated from the mass balances of oxygen and carbon. The reduction rate increased with addition of H2 gas, especially at the temperatures below 1 100°C, and the smelting reduction above 1 280°C decreased. The overall rates of reduction with Ar-CO-H2 gas mixture were computed assuming the additivity for the reductions with CO and H2 gases. Then, it was found that there were negative deviation from additivity about 450-600°C and positive one in the range of 600-800°C. The extraneous effects were attributed to the direct reaction of iron oxide with CO gas and C promoted by H2 gas addition. It was also concluded that water-gas shift reaction played at least no important role in accelerating the reduction.
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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