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Carbothermic reduction of alumina with carbon in vacuum

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Abstract

Carbothermic reduction alumina in vacuum was conducted, and the products were analysed by means of XRD and gas chromatography. Thermodynamic analysis shows that in vacuum the initial carbothermic reduction reaction temperature reduces compared with that under normal pressure, and the preferential order of products is Al4O4C, Al4C3, Al2OC, Al2O and Al. Experiment results show that the carbothermic reduction products of alumina are Al4O4C and Al4C3, and neither Al2OC, Al2O or Al was found. During the carbothermic reduction process, the reaction rate of Al2O3 and carbon decreases gradually with increasing time. Meanwhile, lower system pressure or higher temperature is beneficial to the carbothermic reduction of alumina process. Al4O4C is firstly formed in the carbothermic reaction, and then Al4C3 is formed in lower system pressure or at higher temperature.

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Authors and Affiliations

  1. National Engineering Laboratory of Vacuum Metallurgy, Key Laboratory of Breeding Base of Complex Nonferrous Metal Resources Clear Utilization in Yunnan Province, State Key Laboratory of Nonferrous Metal Vacuum Metallurgy, Kunming University of Science and Technology, Kunming, 650093, China

    Qing-chun Yu  (郁青春), Hai-bin Yuan  (袁海滨), Fu-long Zhu  (朱富龙), Han Zhang  (张晗), Chen Wang  (王辰), Da-chun Liu  (刘大春) & Bin Yang  (杨斌)

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  1. Qing-chun Yu  (郁青春)
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  2. Hai-bin Yuan  (袁海滨)
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  3. Fu-long Zhu  (朱富龙)
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  4. Han Zhang  (张晗)
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  5. Chen Wang  (王辰)
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  6. Da-chun Liu  (刘大春)
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  7. Bin Yang  (杨斌)
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Corresponding author

Correspondence to Qing-chun Yu  (郁青春).

Additional information

Foundation item: Project(U0837604) supported by the Natural Science Foundation of Yunnan Province, China; Project(Jinchuan 201114) supported by the Pre Research Foundation of Jinchuan Group Ltd., China; Project(2011148) supported by the Analysis and Testing Funds of Kunming University of Science and Technology, China

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Yu, Qc., Yuan, Hb., Zhu, Fl. et al. Carbothermic reduction of alumina with carbon in vacuum. J. Cent. South Univ. 19, 1813–1816 (2012). https://doi.org/10.1007/s11771-012-1213-0

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  • DOI: https://doi.org/10.1007/s11771-012-1213-0

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