Measurement of reduction rate of hematite powder with CO-CO2 gas mixture by using thermobalance

Ichiro Araki, Takayuki Maeda, Takeaki Murayama, Yoichi Ono

研究成果: ジャーナルへの寄稿記事

抄録

The reduction rate of hematite powder (0.15mm in diameter) with CO-CO2 gas mixture was measured by a thermobalance of which sensitivity was 1μg. The sample was put into a Pt-basket and the basket was suspended in a reaction tube from the balance. The weight of sample should be less than 0.2g in order to obtain the reduction rate of a single hematite particle accurately. The reduction rate was controlled by interface chemical reaction because the reduction product layer was porous. The chemical reaction rate constant kc was obtained at 600°C-900°C. The value of kc decreased with a rise of temperature because of sintering of hematite layer. The obtained value of kc was applied to the analysis of fluidized bed reduction of hematite powder with CO-CO2 gas mixture. The calculated reduction curves agreed well with the measured ones by fluidized bed.

元の言語英語
ページ(範囲)558-563
ページ数6
ジャーナルTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
82
発行部数7
DOI
出版物ステータス出版済み - 1 1 1996

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thermobalances
Hematite
Carbon Monoxide
hematite
Gas mixtures
Powders
gas mixtures
baskets
Fluidized beds
beds
Chemical reactions
chemical reactions
Reaction rates
ferric oxide
Rate constants
sintering
reaction kinetics
Sintering
tubes
sensitivity

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

これを引用

Measurement of reduction rate of hematite powder with CO-CO2 gas mixture by using thermobalance. / Araki, Ichiro; Maeda, Takayuki; Murayama, Takeaki; Ono, Yoichi.

:: Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan, 巻 82, 番号 7, 01.01.1996, p. 558-563.

研究成果: ジャーナルへの寄稿記事

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