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Metallurgical and Materials Transactions B

, Volume 48, Issue 4, pp 2187–2194 | Cite as

A Comparison between Two Cell Designs for Electrochemical Neodymium Reduction Using Numerical Simulation

  • Tim HaasEmail author
  • Simon Hilgendorf
  • Hanno Vogel
  • Bernd Friedrich
  • Herbert Pfeifer
Article
  • 186 Downloads

Abstract

Nowadays, neodymium is almost solely produced by the electrochemical reduction of Neodymium oxide in fused fluoride salts. Thereby, the fluid flow distribution within the electrolysis cell is important for the productivity and efficiency of the process. In this work, the flow field within a conventional cell with vertical electrodes is compared to that of an innovative cell concept with horizontal electrodes by computational fluid dynamics. The numerical model uses the Eulerian volume of fluid approach to track phase boundaries between the continuous phases, while the Lagrangian discrete phase model is applied to compute the rising trajectories of emitted off-gas bubbles. The calculated results indicate that the new cell type is more suitable for the efficient, large-scale production of neodymium, since there is potential to decrease the cell voltage and enhance the current efficiency. By that, the specific energy consumption can be lowered significantly. However, an advanced level of automation is necessary to operate the new cell.

Keywords

Neodymium Current Efficiency Specific Energy Consumption Electrode Distance Conventional Cell 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. 1.
    C.K. Gupta and N. Krishnamurthy: Extractive Metallurgy of Rare Earth, CRC Press, Boca Raton, FL, 2005.Google Scholar
  2. 2.
    S. Pang, S. Yan, Z. Li, D. Chen, L. Xu, and B. Zhao: Chin. J. Rare Met., 2011, vol. 35, pp. 440–450 (translated from Chinese by Que Z).Google Scholar
  3. 3.
    K. Liu, J. Chen, and X. Wei: Chin. J. Nonferrous Met., 2001, vol. 11, pp. 99–101 (translated from Chinese by Pan Q).Google Scholar
  4. 4.
    H. Vogel, B. Flerus, F. Stoffner, and B. Friedrich: J. Sustainable Metall.—Special Issue: Rare Earths, 2016Google Scholar
  5. 5.
    K. Liu, J. Chen, and X. Wei: Chin. Rare Earths, 2001, vol. 22, pp. 30–33 (translated from Chinese by Pan Q).Google Scholar
  6. 6.
    Z. Zhang, X. Liang, J. Ju, and G. Xu: Chinese Society of Rare Earth—Conf. Proc. 2000, pp. 207–11 (translated from Chinese by Wang J).Google Scholar
  7. 7.
    D. Chen, S. Yan, Z. Li, S. Pang, L. Xu, and X. Guo: J. Chin. Rare Earth Soc., 2011, vol. 29, pp. 769–72 (translated from Chinese by Que Z).Google Scholar
  8. 8.
    J. Wang, Z. Zhang, G. Tu, and W. Wu: Chin. Rare Earths, 2012, vol. 33, pp. 64–67 (translated from Chinese by Que Z).Google Scholar
  9. 9.
    Y. Ren, X. Kong, and L. Xie: J. Rare Earths, 2004, vol. 22, pp. 252–56.Google Scholar
  10. 10.
    S. Fu: J. Chin. Rare Earth Soc., 2007, vol. 25, pp. 71–76 (translated from Chinese by Pan Q).Google Scholar
  11. 11.
    C.W. Hirt and B.D. Nichols: J. Comput. Phys., 1981, vol. 39, pp. 201–25CrossRefGoogle Scholar
  12. 12.
    K. Liu, J. Chen, and X. Wei: Rare Met. Cemented Carbides, 2000, vol. 143, p. 7 (translated from Chinese by Pan Q).Google Scholar
  13. 13.
    K. Liu, J. Chen, X. Wei, T. Zheng, L. Xie, and X. Kong: Chin. Rare Earths, 2000, vol. 21, pp. 37–39 (translated from Chinese by Pan Q).Google Scholar
  14. 14.
    M. Alam, W. Yang, K. Mohanarangam, G. Brooks, and Y. Morsi: Metall. Mater. Trans. B, 2013, vol. 44B, pp. 1155–65.CrossRefGoogle Scholar
  15. 15.
    T. Frank, J. Shi, and A.D. Burns: 3rd Int. Symp. on Two-Phase Flow Modelling and Experimentation, Pisa, 2004.Google Scholar
  16. 16.
    A. Tomiyama, I. Kataoka, I. Zun, and T. Sakaguchi: JSME Int. J. Ser. B Fluids Thermal Eng., 1998, vol. 41, pp. 472–79.CrossRefGoogle Scholar
  17. 17.
    A.W.G. de Vries, A. Biesheuvel, and L. van Wijngaarden: Int. J. Multiphase Flow, 2002, vol. 28, pp. 1823–35.CrossRefGoogle Scholar
  18. 18.
    C. Brücker: Phys. Fluids, 1999, vol. 11, pp. 1781–96.CrossRefGoogle Scholar
  19. 19.
    Yuqing Feng, M. Philip Schwarz, William Yang, and Mark Cooksey: Metall. Mater. Trans. B, 2015, vol. 46B, pp. 1959–81.CrossRefGoogle Scholar
  20. 20.
    M. Ishii and N. Zuber: AIChE J., 1979, vol. 25, pp. 843–55.CrossRefGoogle Scholar
  21. 21.
    L. Schiller and A.Z. Naumann: Ver. Deut. Ing., 1933, vol. 77, pp. 318–20.Google Scholar
  22. 22.
    F. Peebles and H. Garber: Chem. Eng. Progr., 1953, vol. 49, pp. 88–97.Google Scholar
  23. 23.
    G. Bozzano and M. Dente: Comput. Chem. Eng., 2001, vol. 25, pp. 571–76.CrossRefGoogle Scholar

Copyright information

© The Minerals, Metals & Materials Society and ASM International 2017

Authors and Affiliations

  • Tim Haas
    • 1
    Email author
  • Simon Hilgendorf
    • 2
  • Hanno Vogel
    • 2
  • Bernd Friedrich
    • 2
  • Herbert Pfeifer
    • 1
  1. 1.Department of Industrial Furnaces and Heat EngineeringRWTH Aachen UniversityAachenGermany
  2. 2.IME Process Metallurgy and Metal RecyclingRWTH Aachen UniversityAachenGermany

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