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Nd composite selective recovery from waste permanent magnet scrap powders by solid-fluorination reaction

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Abstract

This study proposes a novel waste permanent magnet (WPM) recycling technology by avoiding conventional technology that relies on strong acid and developing a feasible process using relatively inexpensive reagents, thereby reducing overall process cost to acceptable levels. Nd2Fe14B WPMs were transformed into a fluoride/oxide composite material through oxidation/fluorination heat treatment. The phase transition from FeF3-NdF3 to Fe2O3-NdF3 composition was performed via heat treatment. The Fe2O3-NdF3 composition is selectively leached using an oxalic acid. It was confirmed that Fe2O3 was selectively leached, and NdF3 was leached at less than 1 wt.% under various leaching conditions. The neodymium fluoride produced using this technology is expected to be applicable to related fields such as Nd smelting flux or catalysts, and this technology is expected to be applied to various materials containing Fe.

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The authors declare that the data supporting the findings of this study are available within the paper, its supplementary information file.

References

  1. T. Itakura, R. Sasai, H. Itoh, Resource recovery from Nd-Fe-B sintered magnet by hydrothermal treatment. J. Alloys Compd. 408, 1382–1385 (2006). https://doi.org/10.1016/j.jallcom.2005.04.088

    Article  CAS  Google Scholar 

  2. C.-H. Lee, Y.-J. Chen, C.-H. Liao, S. R. Popuri, S.-L. Tsai, C.-E. Hung, Selective leaching process for neodymium recovery from scrap Nd-Fe-B magnet. Metall. Mater. Trans. A Phys. Metall. Mater. Sci. 44, 5825–5833 (2013). https://doi.org/10.1007/s11661-013-1924-3

  3. T.H. Okabe, O. Takeda, K. Fukuda, Y. Umetsu, Direct extraction and recovery of neodymium metal from magnet scrap. Mater. Trans. 44(4), 798–801 (2003). https://doi.org/10.2320/matertrans.44.798

    Article  CAS  Google Scholar 

  4. S. Li, Z. Cui, W. Li, D. Wang, Z. Wang, Technical actuality and prospect of NdFeB waste recycling. Mater. Rep 35, 3001–3009 (2021)

    Google Scholar 

  5. C. Huang, X. Liu, Y. Gao, S. Liu, B. Li, Cathodic processes of neodymium(III) in LiF-NdF3-Nd2O3 melts. Faraday Discuss. 190, 339–349 (2016). https://doi.org/10.1039/c6fd00014B

    Article  CAS  Google Scholar 

  6. E. Stefanidaki, C. Hasiotis, C. Kontoyannis, Electrodeposition of neodymium from LiF-NdF–3-Nd2O3 melts. Electrochim. Acta 46(17), 2665–2670 (2001). https://doi.org/10.1016/S0013-4686(01)00489-3

    Article  CAS  Google Scholar 

  7. J. Chun, C. Jo, S. Sahgong, M.G. Kim, E. Lim, D.H. Kim, J. Hwang, E. Kang, K.A. Ryu, Y.S. Jung, Y. Kim, J. Lee, Ammonium fluoride mediated synthesis of anhydrous metal fluoride-mesoporous carbon nanocomposites for high-performance lithium ion battery cathodes. ACS Appl. Mater. Interfaces 8(51), 35180–35190 (2016). https://doi.org/10.1021/acsami.6b10641

    Article  CAS  Google Scholar 

  8. B. Kozekanan, A. Moradkhani, H. Baharvandi, Thermodynamic and phase analysis of SiC-nano/microB4C-C composites produced by pressureless sintering method. J. Korean Ceram. Soc. 59, 180–192 (2022). https://doi.org/10.1007/s43207-021-00173-x

    Article  CAS  Google Scholar 

  9. H. Bae, Y. Shin, L. Mathur, Defect chemistry of p-type perovskite oxide La0.2Sr0.8FeO3-δ: a combined experimental and computational study. J. Korean Ceram. Soc. 59, 876–888 (2022). https://doi.org/10.1007/s43207-022-00237-6

  10. E.P. Lokshin, O. Tareeva, Solubility of YF3, CeF3, PrF3, NdF3, and DyF3 in solutions containing sulfuric and phosphoric acids. Russ. J. Inorg. Chem. 52(12), 1830–1834 (2007). https://doi.org/10.1134/S0036023607120042

    Article  Google Scholar 

  11. K.M. Österdahl, Å.C. Rasmuson, Solubility of β-FeF3·3H2O in mixtures of nitric and hydrofluoric acid. J. Chem. Eng. Data 51(1), 223–229 (2006). https://doi.org/10.1021/je050347n

    Article  CAS  Google Scholar 

  12. M. Gergoric, A. Barrier, T. Retegan, Recovery of rare-earth elements from neodymium magnet waste using glycolic, maleic, and ascorbic acids followed by solvent extraction. J. Sustain. Metall. 5, 85–96 (2019). https://doi.org/10.1007/s40831-018-0200-6

    Article  Google Scholar 

  13. G. Reisdörfer, D. Bertuol, E.H. Tanabe, Recovery of neodymium from the magnets of hard disk drives using organic acids. Miner. Eng. 143, 105938 (2019). https://doi.org/10.1016/j.mineng.2019.105938

    Article  CAS  Google Scholar 

  14. S.O. Lee, T. Tran, B.H. Jung, S.J. Kim, M.J. Kim, Dissolution of iron oxide using oxalic acid. Hydrometallurgy 87(3–4), 91–99 (2007). https://doi.org/10.1016/j.hydromet.2007.02.005

    Article  CAS  Google Scholar 

  15. C. Nwoye, Model for evaluation of the concentration of dissolved phosphorus during leaching of iron oxide ore in oxalic acid solution. JMMCE 8(3), 181–188 (2009). https://doi.org/10.4236/jmmce.2009.83016

    Article  Google Scholar 

  16. R. Salmimies, M. Mannila, J. Kallas, A. Häkkinen, Acidic dissolution of hematite: Kinetic and thermodynamic investigations with oxalic acid. Int. J. Miner. Process. 110, 121–125 (2012). https://doi.org/10.1016/j.minpro.2012.04.001

    Article  CAS  Google Scholar 

  17. V. Ambikadevi, M. Lalithambika, Effect of organic acids on ferric iron removal from iron-stained kaolinite. Appl. Clay Sci. 16, 133–145 (2000). https://doi.org/10.1016/S0169-1317(99)00038-1

    Article  CAS  Google Scholar 

  18. V. Arslan, A study on the dissolution kinetics of iron oxide leaching from clays by oxalic acid. Physicochem. Probl. Miner. Process, 57 (3), 97–111 (2021). https://doi.org/10.37190/ppmp/135749

  19. F. Chen, F. Liu, L. Wang, J. Wang, Comparison of the preparation process of rare earth oxides from the water leaching solution of waste Nd-Fe-B magnets’ sulfate roasting products. Processes 10(11), 2310 (2022). https://doi.org/10.3390/pr10112310

    Article  CAS  Google Scholar 

  20. Q. Liu, T. Tu, H. Guo, H. Cheng, X. Wang, High-efficiency simultaneous extraction of rare earth elements and iron from NdFeB waste by oxalic acid leaching. J. Rare Earths 39(3), 323–330 (2021). https://doi.org/10.1016/j.jre.2020.04.020

    Article  CAS  Google Scholar 

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Acknowledgements

This work was supported by the Korea Evaluation Institute of Industrial Technology (KEIT), which is funded by the Ministry of Trade, Industry, and Energy, Republic of Korea (Project No. 20015769). This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2020R1A6A1A03045059). We thank the Korea Basic Science Institute for the technical support.

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This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

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Authors and Affiliations

  1. Center for Advanced Materials and Processing, Institute for Advanced Engineering, Yong In, 17180, South Korea

    Yun-Ho Jin, Hee-Seon Kim, Jae-Kyo Yang & Dae-Weon Kim

  2. School of Civil, Environmental, and Architectural Engineering, Korea University, Seoul, 02841, South Korea

    Yun-Ho Jin & Dong-Wan Kim

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  1. Yun-Ho Jin
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  2. Hee-Seon Kim
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Correspondence to Dae-Weon Kim or Dong-Wan Kim.

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Jin, YH., Kim, HS., Yang, JK. et al. Nd composite selective recovery from waste permanent magnet scrap powders by solid-fluorination reaction. J. Korean Ceram. Soc. 61, 97–103 (2024). https://doi.org/10.1007/s43207-023-00350-0

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