Reduction Behavior of Packed Bed of Sinter Reduced by CO-CO2-H2-H2O-N2 Gas

被引：7

作者：

Kon, Tatsuya ^{[1
]}

Saito, Ryo ^{[1
]}

Ueda, Shigeru ^{[1
]}

Natsui, Shungo ^{[2
]}

Inoue, Ryo ^{[3
]}

Ariyama, Tatsuro ^{[4
]}

机构：

[1] Tohoku Univ, IMRAM, Aoba Ku, Sendai, Miyagi 9808577, Japan

[2] Hokkaido Univ, Fac Engn, Kita Ku, Sapporo, Hokkaido 0608628, Japan

[3] Akita Univ, Fac Int Resource Sci, Akita 0108502, Japan

[4] Tohoku Univ, Aoba Ku, Sendai, Miyagi 9808577, Japan

来源：

ISIJ INTERNATIONAL | 2015年 / 55卷 / 06期

关键词：

reduction; sinter ore; hydrogen; blast furnace; STEPWISE REDUCTION; KINETIC-ANALYSIS; SHAFT FURNACE; CO-CO2-N2; MIXTURES; PELLETS;

D O I：

10.2355/isijinternational.55.1213

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

To mitigate CO2 emission from a blast furnace, the use of H-2 as a reducing agent is considered to be a prominent method. Reduction of iron ore was reported to be improved by H-2 addition. In the present research, reduction in a sinter-packed bed by CO and H-2 was carried out under various oxygen partial pressures, and the influence of reduction atmosphere on the reaction behavior was investigated. It was confirmed that the reduction rates were higher when using H-2/H2O and CO/CO2/H-2/H2O mixtures than when using a CO/CO2 gas mixture. The reaction rate constant for iron ore reduction was determined from the experimental result using a numerical model. The influence of the water-gas shift reaction on the reduction rate was analyzed by comparing the results obtained using the numerical model and those in the experiments. Moreover, the longitudinal distribution of the reaction rate in the packed bed was analyzed to examine the influence of the water-gas shift reaction.

引用

页码：1213 / 1222

页数：10

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