Reduction Reactions in Al2O3–C–Fe and Al2O3–Fe2O3–C Systems at 1823 K
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概要
- 論文の詳細を見る
With a view to produce Fe–Al alloys for deoxidation during steel refining, chemical reactions were investigated in Al2O3–C–Fe and Al2O3–Fe2O3–C systems at 1823 K. Using a horizontal tube furnace and argon atmosphere, interactions were investigated for time periods up to 2 hours. Two sets of blends were prepared from initial constituents, which were later used to prepare two types of substrates. Alumina and synthetic graphite powders were blended in a 70: 30 proportion (blend I), and in the second set, Fe2O3 was blended with C in a proportion of 75:25 (blend II). In one case, blend I was mixed thoroughly with iron powder (Fe (2.7 pct C)) in a ratio of 80:20; in the second case, blend I was mixed with blend II in the ratio of 70:30. We report significant reduction reactions in both cases. SEM/EDS studies on the Al2O3–C–Fe system showed unambiguous evidence for the pick-up of aluminium by molten iron after 1 hour. Levels of aluminium in molten iron were found to increase significantly with time. Due to in-situ reduction of Fe2O3, the generation of CO gas and associated turbulence, the reactions were quite fast in the Al2O3–Fe2O3–C system. X-ray diffraction studies showed the presence of additional diffraction peaks belonging to Fe3AlC and Fe3Al systems. Molten iron was found to act as a reducing agent and a metallic solvent in both cases. This study provides evidence for the carbothermic reduction of alumina at 1823 K and for the formation of ferroalloys directly from mixed oxides of aluminium and iron.
- The Iron and Steel Institute of Japanの論文
著者
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Khanna Rita
Centre For Sustainable Materials Res. And Technol. School Of Materials Sci. And Engineering The Univ
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Ikram-ul-haq Muhammad
Centre For Sustainable Materials Research And Technology School Of Materials Science And Engineering
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Seetharaman Seshadri
Department Of Materials Science And Engineering Kth Royal Institute Of Technology
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Sahajwalla Veena
Centre For Sustainable Materials Research And Technology (smart@unsw) School Of Materials Science An
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Mukherjee Partho
Advanced Materials Technology Department, CSIR-Institute of Minerals and Materials Technology
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Sadi Seyed
Centre for Sustainable Materials Research and Technology, School of Materials Science and Engineering, The University of New South Wales
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