期刊
ISIJ INTERNATIONAL
卷 46, 期 10, 页码 1403-1409出版社
IRON STEEL INST JAPAN KEIDANREN KAIKAN
DOI: 10.2355/isijinternational.46.1403
关键词
pig-iron; magnetite ore; coal; composite pellets; microwave heating
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.
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