Effect of Hydrogen Addition on Reduction Behavior of Ore Layer Mixed with Coke

被引：19

作者：

Kashihara, Yusuke ^{[1
]}

Sawa, Yoshitaka ^{[1
]}

Sato, Michitaka ^{[2
]}

机构：

[1] JFE Steel Corp, Steel Res Lab, Chuo Ku, Chiba 2600835, Japan

[2] JFE Steel Corp, Steel Res Lab, Fukuyama, Hiroshima 7218510, Japan

来源：

ISIJ INTERNATIONAL | 2012年 / 52卷 / 11期

关键词：

blast furnace; CO2; emission; low RAR operation; coke mixed charging; hydrogen; reducibility; carbon gasification; OPERATION; SINTER;

D O I：

10.2355/isijinternational.52.1979

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Low RAR (reducing agent rate) operation of the blast furnace is one of effective techniques for reducing CO2 emissions. Coke mixed charging is a well-known and available measure to achieve low RAR operation by improving permeability and reducibility. Utilization of hydrogenous reducing agents is also an efficient measure. A reduction test under load was performed to investigate the effect of coke mixing with hydrogen addition on reduction behavior of the ore. Simultaneous use of coke mixing and hydrogen addition accelerated the reduction rate through the carbon gasification rate, and it was also decreased pressure drop. The effect of coke mixing and hydrogen addition on blast furnace operation was examined using a two-dimensional mathematical simulation model. In case of the ore layer mixed with coke, hydrogen addition in the reduction gas increased the hydrogen reduction ratio and decreased the direct reduction ratio. As a result, RAR decreased and permeability improved.

引用

页码：1979 / 1985

页数：7

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