Nd composite selective recovery from waste permanent magnet scrap powders by solid-fluorination reaction
Journal of the Korean Ceramic Society - Trang 1-7 - 2023
Tóm tắt
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.
Tài liệu tham khảo
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
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
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
S. Li, Z. Cui, W. Li, D. Wang, Z. Wang, Technical actuality and prospect of NdFeB waste recycling. Mater. Rep 35, 3001–3009 (2021)
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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