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Application of molecular interaction volume model in separation of Sn-Zn alloy by vacuum distillation

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Abstract

The activity of components of Sn-Zn binary alloy system was predicted based on the molecular interaction volume model (MIVM). The calculated values are in good agreement with available experimental data of activities, which indicates that this model is of stability and reliability because the MIVM has a good physical basis. The vapor-liquid phase equilibrium of Sn-Zn alloy system in vacuum distillation was calculated as a function of the activity coefficient. The results show that the content of Sn in vapor phase is 4.2×10−7 (mass fraction) while in liquid phase it is 90% (mass fraction) at 1 073 K, and the content of Sn in vapor phase increases with increasing the melt temperature and content of Sn in liquid phase. Vacuum distillation experiments were carried out on Sn-Zn alloy for the proper interpretation of the results of the MIVM in the temperature range of 973–1 273 K under pressures of 15–200 Pa. The experimental results show that the content of Sn in vapor phase is 5×10−6 (mass fraction) while in liquid phase it is 90% (mass fraction) under the operational condition of 1 073 K, 100 min and 15 Pa. The experimental results are in good agreement with the predicted values of the MIVM for Zn-Sn binary alloy system.

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Authors and Affiliations

  1. National Engineering Laboratory for Vacuum Metallurgy (Kunming University of Science and Technology), Kunming, 650093, China

    Ling-xin Kong  (孔令鑫), Bin Yang  (杨斌), Yi-fu Li  (李一夫), Bao-qiang Xu  (徐宝强), Long Han  (韩龙), Da-chun Liu  (刘大春) & Yong-nian Dai  (戴永年)

  2. State Key Laboratory Breeding Base of Complex Non-ferrous Metal Resources Clear Utilization (Kunming University of Science and Technology), Kunming, 650093, China

    Ling-xin Kong  (孔令鑫), Yi-fu Li  (李一夫), Bao-qiang Xu  (徐宝强), Long Han  (韩龙) & Da-chun Liu  (刘大春)

  3. Key Laboratory for Nonferrous Vacuum Metallurgy of Yunnan Province (Kunming University of Science and Technology), Kunming, 650093, China

    Ling-xin Kong  (孔令鑫), Bin Yang  (杨斌), Yi-fu Li  (李一夫), Bao-qiang Xu  (徐宝强) & Da-chun Liu  (刘大春)

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  1. Ling-xin Kong  (孔令鑫)
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  2. Bin Yang  (杨斌)
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  3. Yi-fu Li  (李一夫)
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  4. Bao-qiang Xu  (徐宝强)
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  5. Long Han  (韩龙)
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  6. Da-chun Liu  (刘大春)
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  7. Yong-nian Dai  (戴永年)
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Correspondence to Bin Yang  (杨斌).

Additional information

Foundation item: Project(2012CB722803) supported by the Key Project of National Basic Research and Development Program of China; Project(2011FA008) supported by the Key Project of Science and Technology Program of Yunnan Province, China

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Kong, Lx., Yang, B., Li, Yf. et al. Application of molecular interaction volume model in separation of Sn-Zn alloy by vacuum distillation. J. Cent. South Univ. 20, 3372–3378 (2013). https://doi.org/10.1007/s11771-013-1861-8

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  • DOI: https://doi.org/10.1007/s11771-013-1861-8

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