Carbothermic Reduction of Hematite Powders by Microwave Heating

被引：42

作者：

Hayashi, Miyuki ^{[1
]}

Takeda, Kohei ^{[2
]}

Kashimura, Keiichiro ^{[3
]}

Watanabe, Takashi ^{[4
]}

Nagata, Kazuhiro ^{[5
]}

机构：

[1] Tokyo Inst Technol, Dept Met & Ceram Sci, Meguro Ku, Tokyo 1528552, Japan

[2] Tokyo Inst Technol, Dept Chem & Mat Sci, Tokyo 1528552, Japan

[3] Kyoto Univ, Res Inst Sustainable Humanosphere, Uji, Kyoto 6110011, Japan

[4] Tokyo Inst Technol, Dept Chem & Mat Sci, Meguro Ku, Tokyo 1528552, Japan

[5] Tokyo Univ Arts, Dept Conservat Sci, Taito Ku, Tokyo 1108714, Japan

来源：

ISIJ INTERNATIONAL | 2013年 / 53卷 / 07期

关键词：

hematite; microwave; ironmaking; gas analysis; thermal runaway; PIG-IRON; 2.45; GHZ; ORES; COAL; KW;

D O I：

10.2355/isijinternational.53.1125

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

To examine the applicability of hematite ore to the ironmaking by microwave heating, the carbothermic reduction of hematite powders by microwave heating were elucidated using the gas analysis of exhausted gas, and were compared with that of magnetite powders. The temperature of the hematite - graphite mixed powders moderately increases at the beginning, and then, starts to increase abruptly at around 400 degrees C owing to the thermal runaway of Fe2O3. Once the reduction reaction starts to take place, the reduction reaction rate of hematite is even faster than that of magnetite, which is the same behavior as that observed by conventional heating. Hematite ore could be a possible raw material for microwave ironmaking: When hematite ore is utilized, the ore should be preheated up to around 400 degrees C prior to the feeding to a microwave furnace.

引用

页码：1125 / 1130

页数：6

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