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The Influence of Composition on Crystallization and Liberation Behavior of Ti-Rich Phase in Ti-Bearing Slags

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Abstract

Crystallization behavior, liberation and beneficiation of Ti-rich phases precipitated from Ti-bearing slag of smelting process for titanomagnetite were systematically investigated. For the slags containing 40–55 % TiO2, anosovite can precipitate as the main Ti-rich phase, especially as the TiO2/MgO/Al2O3 content is relatively high and basicity [R = w(CaO)/w(SiO2)] is low. In particular, as the content of MgO is low, crystallization of rutile is dominant and most of the Ti element is enriched in rutile. Based on the results of variation in the Ti enriched phases within the whole composition, the crystallization diagram of Ti-rich phases has been constructed in the present study. Slags with compositions being in the optimal ranges in the crystallization diagram shows the most satisfactory liberation degree and beneficiation response. By gravity separation, the TiO2 content of the slag can be upgraded to nearly 70 %. In addition, compared with perovskite and rutile, anosovite grains show much bigger sizes since the growth of anosovite crystals is easier under the same condition.

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Acknowledgments

The authors are grateful to financial support from the National Natural Science Foundation of China (Nos. 51404226 and 21325628).

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Authors and Affiliations

  1. State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China

    Zhen Wang, Xinwei Liu, Lei Zhang & Qingshan Zhu

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  1. Zhen Wang
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  2. Xinwei Liu
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  3. Lei Zhang
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  4. Qingshan Zhu
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Correspondence to Qingshan Zhu.

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Wang, Z., Liu, X., Zhang, L. et al. The Influence of Composition on Crystallization and Liberation Behavior of Ti-Rich Phase in Ti-Bearing Slags. Trans Indian Inst Met 69, 97–105 (2016). https://doi.org/10.1007/s12666-015-0720-8

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  • DOI: https://doi.org/10.1007/s12666-015-0720-8

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