Production of pig iron from magnetite ore-coal composite pellets by microwave heating

被引：65
作者：
Ishizaki, Kotaro
Nagata, Kazuhiro
Hayashi, Tetsuro
机构：
[1] Tokyo Inst Technol, Dept Chem & Mat Sci, Meguro Ku, Tokyo 1528552, Japan
[2] Gife Res Inst Ind Prod Technol, Seki Branch Lab, Gifu 5013265, Japan
来源：
ISIJ INTERNATIONAL | 2006年 / 46卷 / 10期
关键词：
pig-iron; magnetite ore; coal; composite pellets; microwave heating;
D O I：
10.2355/isijinternational.46.1403
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Magnetite ore-coal composite pellets with about 10, 15 and 20 mm diameter were rapidly smelted to produce pig iron by microwave heating in N-2 gas. A microwave generator with 5 kW maximum power at 2.45 GHz was employed. Carbon content in pig iron was about 2 mass% near the liquidus line in the Fe-C system. Slag was easily separated from pig iron. By XRD analysis it is realized that the reduction of magnetite started at about 800 degrees C and was completed to be pig iron at about 1 350 degrees C. The heating rate of pellets was independent of their mass but dependent on applied power because of self heating. According to the increase of heating rate, the level of impurities in pig iron decreased less than blast furnace.
引用
收藏
页码：1403 / 1409
页数：7
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