Investigation of the Microwave Iron-Production Process with Multipoint Pyrometric and Spectroscopic Measurements
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概要
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Carbothermic reduction of magnetite in a 2.45-GHz microwave multimode furnace was investigated with multipoint pyrometric and spectroscopic measurements. Both experimental results emphasize the importance of surface heating of the specimen by microwave-generated plasma for reducing iron oxide. The pyrometric observation shows a shift of the heating mode from the direct volumetric heating by microwave to the surface heating by microwave-generated plasma, when the temperature of the material suddenly rises from ∼800 to ∼1000 °C accompanied by light emission from plasma. The emission spectrum in the near-UV range (240-310 nm) changes drastically from a continuous spectrum to a line emission spectrum of iron, representing progress of carbothermic reduction of iron oxide. The multipoint spectroscopic observation indicates extensive carbothermic reduction occurring on the entire upper surface of the specimen.
- 社団法人 プラズマ・核融合学会の論文
著者
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SATO Motoyasu
National Insitute for Fusion Science
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Okajima Shigeki
Chubu University
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AKIYAMA Ryuichi
National Institute for Fusion Science
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NAKAYAMA Kazuya
Chubu University
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TAKAYAMA Sadatsugu
National Institute for Fusion Science
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MATSUBARA Akihiro
Chubu University, 1200 Matsumoto, Kasugai, Aichi 487-8501, Japan
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MATSUBARA Akihiro
Chubu University 1200, Matsumoto-cho, Kasugai-shi, Aichi 487-8501, Japan
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TOMIMOTO Masahiro
Chubu University, 1200 Matsumoto, Kasugai, Aichi 487-8501, Japan
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KANEBA Takahiro
Chubu University, 1200 Matsumoto, Kasugai, Aichi 487-8501, Japan
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