Localized Heating and Reduction of Magnetite Ore with Coal in Composite Pellets Using Microwave Irradiation
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概要
- 論文の詳細を見る
Magnetite iron ore-coal composite pellets were microwave irradiated in N2 atmosphere with a power supply gradually increased in 2 min intervals from 0.2 up to 2 kW at 2.45 GHz. Electron probe microanalysis (EPMA), X-ray image of SEM micrographs, back scattered electron image (BSE) and Fe, O, S and C mappings of composite pellets irradiated up to different temperatures were obtained. Under the present experimental conditions, pellets heated up to about 800°C without reduction. Above this temperature the reduction occurred stepwise; Fe3O4 reduced to FeO between about 800°C and 1000°C and then FeO reduced to Fe from about 1000 to 1250°C average temperatures. The measured temperature appears to reasonable represent the average temperature of the pellet. However inside of the reacting mass localized slightly different temperatures may exist. Point carbon contents of reduced iron inside the composite pellet irradiated up to 1150°C were from almost 0% to 2% with no correlation between with their spatial location inside the pellet. It is concluded that carbon in the microwave irradiated pellet acting as a reducing and heating agent at the same time generates localized reduction microenvironments.
- 社団法人 日本鉄鋼協会の論文
- 2007-06-15
著者
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NAGATA Kazuhiro
Department of Chemistry and Materials Science, Tokyo Institute of Technology
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Nagata Kazuhiro
Department Of Chemistry And Materials Science Tokyo Institute Of Technology
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Nagata Kazuhiro
Dep. Of Chemistry And Materials Sci. Tokyo Inst. Of Technol.
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ISHIZAKI Kotaro
Department of Chemistry and Materials Science, Tokyo Institute of Technology
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HAYASHI Tetsuro
Seki Branch Laboratory, Gifu Research Institute of Industrial Product Technology
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Ishizaki Kotaro
Empa Swiss Federal Laboratories For Materials Sci. And Technol.
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Ishizaki Kotaro
Department Of Chemistry And Materials Science Tokyo Institute Of Technology
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Hayashi Tetsuro
Seki Branch Laboratory Gifu Research Institute Of Industrial Product Technology
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Nagata Kazuhiro
Department Of Cell Biology Chest Disease Research Institute Kyoto University
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NAGATA Kazuhiro
Department of Conservation Science, Tokyo University of the Arts
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