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Mineral phase reconstruction behavior of direct reduction and smelting titanium slag at high temperature and slow cooling

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Abstract

Titanium slag in this study was produced by subjecting titanomagnetite concentrate to direct reduction-electric furnace smelting. Processing mineralogy and mineral phase reconstruction behavior at high temperature and slow cooling treatment were examined by chemical analysis, X-ray diffraction (XRD), optical microscopy (OM), scanning electron microscopy (SEM), and energy-dispersive spectroscopy (EDS). Anosovite solid solution is the main titanium product by the direct reduction and smelting process. Results of slow-cooling experiments show that crystal volume and size increase as cooling rate decreases. Anosovite and gangue mineral crystals develop fully with large crystal volume and size at a cooling rate of 2 K·min−1. Moreover, the growth of anosovite crystal was characterized by crystal nucleation and growth theory. These results provide further insights into the separation of anosovite from gangue by mineral processing.

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Acknowledgments

This study was financially supported by the Major Program of the National Natural Science Foundation of China (No. 51090385).

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Authors and Affiliations

  1. State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming, 650093, China

    Yi-Jie Wang, Shu-Ming Wen, Qi-Cheng Feng & Zhi-Wen Ye

  2. Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming, 650093, China

    Yi-Jie Wang, Shu-Ming Wen, Qi-Cheng Feng & Zhi-Wen Ye

  3. Advanced Analysis and Measurement Center, Yunnan University, Kunming, 650091, China

    Min Wang

Authors
  1. Yi-Jie Wang
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  2. Shu-Ming Wen
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  3. Qi-Cheng Feng
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  4. Zhi-Wen Ye
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  5. Min Wang
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Correspondence to Shu-Ming Wen.

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Wang, YJ., Wen, SM., Feng, QC. et al. Mineral phase reconstruction behavior of direct reduction and smelting titanium slag at high temperature and slow cooling. Rare Met. 34, 440–444 (2015). https://doi.org/10.1007/s12598-015-0491-8

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  • DOI: https://doi.org/10.1007/s12598-015-0491-8

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