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Chlorination Behavior of Low-Grade Titanium Slag in AlCl3-NaCl Molten Salt

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Abstract

Aluminum chloride (AlCl3) is an effective chlorinating agent and catalyst for the chlorination of low-grade titanium slag to produce titanium tetrachloride in molten salts. In this paper, the chlorination behavior of low-grade titanium slag by anhydrous AlCl3 in AlCl3-NaCl molten salt was investigated. Thermodynamic analysis revealed that aluminum chloride can be an effective agent for low-grade titanium slag, and that the addition of NaCl can form a compound molten salt together with AlCl3 to prevent the evaporation of AlCl3.chlorination experiments were conducted on low-grade titanium slag in AlCl3-NaCl molten salt to investigate the effects of temperature and the amounts of aluminum chloride and sodium chloride added. Under optimized experimental conditions, the selective separation of titanium from the titanium slag was effectively achieved, and the extraction rate of titanium reached 79.6%. Other impurity elements in the form of oxides or chlorides remained in the residue. Finally, a reaction mechanism for the extraction of titanium from low-grade titanium slag in AlCl3-NaCl molten salt has been proposed.

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Acknowledgements

The authors are grateful for financial support from the National Natural Science Foundation of China (Grant No. 51874156; 21968013) and the Science and Technology Planning Project of Sichuan Province (Grant No. 2019 YJ0687).

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Authors and Affiliations

  1. National Engineering Laboratory of Vacuum Metallurgy, Kunming University of Science and Technology, Kunming, 650093, Yunnan, People’s Republic of China

    Pan Deng, Liang Li, Yaoqiang Jia, Dachun Liu, Wenlong Jiang & Lingxin Kong

  2. State Key Laboratory of Complex Nonferrous Metal Resources Clear Utilization in Yunnan Province, Kunming, 650093, Yunnan, People’s Republic of China

    Pan Deng, Liang Li, Yaoqiang Jia, Dachun Liu, Wenlong Jiang & Lingxin Kong

  3. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, People’s Republic of China

    Pan Deng, Liang Li, Yaoqiang Jia, Dachun Liu, Wenlong Jiang & Lingxin Kong

  4. State Key Laboratory of Vanadium and Titanium Comprehensive Utilization, Pangang Group Research Institute Co.Ltd, Panzhihua, 617000, China

    Liang Li

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  1. Pan Deng
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  2. Liang Li
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Correspondence to Dachun Liu.

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Deng, P., Li, L., Jia, Y. et al. Chlorination Behavior of Low-Grade Titanium Slag in AlCl3-NaCl Molten Salt. JOM 74, 213–221 (2022). https://doi.org/10.1007/s11837-021-05014-0

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  • DOI: https://doi.org/10.1007/s11837-021-05014-0

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