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Phase Evolution During the Carbothermic Reduction Process of Ilmenite Concentrate

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Abstract

The phase evolution during the carbothermic reduction process of Panzhihua ilmenite concentrate was investigated under argon atmosphere. The Panzhihua ilmenite concentrate briquette with graphite powder was reduced at 1473 K, 1573 K, 1673 K, and 1773 K (1200 °C, 1300 °C, 1400 °C, and 1500 °C) respectively, with the molar ratios of C to FeTiO3 being 4:1 and 5:1. The phase transformation of the briquette reduced at different temperatures was investigated by X-ray diffraction and scanning electron microscope. During the carbothermic reduction process from 1473 K to 1773 K (1200 °C to 1500 °C), it was found that main phases were Fe, Ti3O5, Ti2O3, and TiC x O y . The lowest temperature for the generation of TiC x O y was 1573 K (1300 °C) for both kinds of briquettes with different C contents. The rate controlling step for the carbothermic reduction above 1573 K (1300 °C) obeyed the diffusion model. The reduction degree of the ilmenite was increased by increasing the temperature. With the increase of reaction temperature and reaction time, TiC x O y phase would be reduced to TiC phase.

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Acknowledgments

Thanks are given to the financial supports from the National Natural Science Foundation of China (51304018).

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Authors and Affiliations

  1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, P.R. China

    Hai-Peng Gou (Doctoral Student), Guo-Hua Zhang (Associate Professor) & Kuo-Chih Chou (Professor)

  2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, P.R. China

    Hai-Peng Gou (Doctoral Student), Guo-Hua Zhang (Associate Professor) & Kuo-Chih Chou (Professor)

Authors
  1. Hai-Peng Gou
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  2. Guo-Hua Zhang
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  3. Kuo-Chih Chou
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Correspondence to Guo-Hua Zhang.

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Manuscript submitted April 9, 2014.

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Gou, HP., Zhang, GH. & Chou, KC. Phase Evolution During the Carbothermic Reduction Process of Ilmenite Concentrate. Metall Mater Trans B 46, 48–56 (2015). https://doi.org/10.1007/s11663-014-0175-z

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