Advances in environmental research

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Rare earths from secondary sources: profitability study

  • Innocenzi, Valentina (Department of Industrial Engineering, Information and Economy, University of L'Aquila Via Giovanni Gronchi) ;
  • De Michelis, Ida (Department of Industrial Engineering, Information and Economy, University of L'Aquila Via Giovanni Gronchi) ;
  • Ferella, Francesco (Department of Industrial Engineering, Information and Economy, University of L'Aquila Via Giovanni Gronchi) ;
  • Veglio, Francesco (Department of Industrial Engineering, Information and Economy, University of L'Aquila Via Giovanni Gronchi)
  • Received : 2016.07.21
  • Accepted : 2016.09.30
  • Published : 2016.06.25
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Abstract

The paper is focused on the economic analysis of two hydrometallurgical processes for recovery of yttrium and other rare earth elements (REEs) from fluorescent phosphors of spent lamps. The first process includes leaching with sulphuric acid and precipitation of a mixture of oxalates by oxalic acid, the second one includes leaching with sulphuric acid, solvent extraction with D2EHPA, stripping by acid and recovery of yttrium and traces of other rare earths (REs) by precipitation with oxalic acid. In both cases the REEs were recovered as oxides by calcination of the oxalate salts. The economic analysis was estimated considering the real capacity of the HydroWEEE mobile's plant ($420kg\;batch^{-1}$). For the first flow-sheet the cost of recycling comes to $4.0{\euro}kg^{-1}$, while the revenue from the end-product is around $5.40{\euro}kg^{-1}$. The second process is not profitable, as well as the first one, taking into account the composition of the final oxides: the cost of recycling comes to $5.2{\euro}kg^{-1}$, while the revenue from the end-product is around $3.56{\euro}kg^{-1}$. The process becomes profitable if the final RE oxide mixture is sold for nearly $50{\euro}kg^{-1}$, a value rather far from the current market prices but not so unlikely since could be achieved in the incoming years, considering the significant fluctuations of the Res' market.

Keywords

References

  1. Argus Media Company (2016), https://www.metal-pages.com/.
  2. Binnemans, K., Jones, P.T., Blanpain, B., Gerven, T.V., Yang, Y., Walton, A. and Buchert, B. (2013), "Recycling of rare earths: a critical review", J. Clean. Prod., 51, 1-22. https://doi.org/10.1016/j.jclepro.2012.12.037
  3. Braconnier, J.J. and Rollat, A. (2010), "Process for recovery of rare earths starting from a solid mixture containing a halophosphate and compound of one or more rare earths", Patent WO2010118967 A1, Rhodia Operations, France.
  4. De Michelis, I., Ferella, F., Fioravante Varelli, E. and Veglio, F. (2011), "Treatment of exhaust fluorescent lamps to recover yttrium: Experimental and process analyses", Waste Manage, 31(12), 2559-2568. https://doi.org/10.1016/j.wasman.2011.07.004
  5. Galhoum, A.A., Atia, A.A., Mahfouz, M.G., Abdel-Rehem, S.T., Gomaa, N.A., Vincent, T. and Guibal, E. (2015), "Dy(III) recovery from dilute solutions using magnetic-chitosan nano-based particles grafted with amino acids", J. Mater. Sci., 50(7), 2832-2848. https://doi.org/10.1007/s10853-015-8845-z
  6. Galhoum, A.A., Mahfouz, M.G., Atia, A.A., Gomaa, N.A., Abdel-Rehem, S.T., Vincent, T. and Guibal, E. (2016), "Alanine and serine functionalized magnetic nano-based particles for sorption of Nd(III) and Yb(III)", Adv. Environ. Res., 5(1), 1-18. https://doi.org/10.12989/aer.2016.5.1.001
  7. Innocenzi, V., Michelis, I., Ferella, F. and Veglio F. (2013a), "Recovery of yttrium from cathode ray tubes and lamps fluorescent powders: experimental results and economic simulation", Waste Manage, 33(11), 2390-2396. https://doi.org/10.1016/j.wasman.2013.06.002
  8. Innocenzi, V., De Michelis, I., Ferella, F., Beolchini, F., Kopacek, B. and Veglio F. (2013b), "Recovery of yttrium from fluorescent powder of cathode ray tube, CRT: Zn removal by sulphide precipitation", Waste Manage, 33(11), 2364-2371. https://doi.org/10.1016/j.wasman.2013.07.006
  9. Innocenzi, V., De Michelis, I., Kopacek, B. and Veglio, F. (2014), "Yttrium recovery from primary and secondary sources: a review of main hydrometallurgical processes", Waste Manage, 34(7), 1237-1250. https://doi.org/10.1016/j.wasman.2014.02.010
  10. Porob, D.G., Srivastava, A.M., Ramachandran, G.C., Nammalwar, P.K. and Comanzo, H.A. (2011), "Rare earth recovered from fluorescent material and associated method", Patent WO 2011/106167 A1.
  11. Rabah, M.A. (2008), "Recyclables recovery of europium and yttrium metals and some salts from spent fluorescent lamps", Waste Manage, 28(2), 218-325.
  12. Shimizu, R., Sawada, K., Enokida, Y. and Yamamoto, I. (2005), "Supercritical fluid extraction of rare earth elements from luminescent material in waste fluorescent lamps", J. Supercrit. Fluid., 33(3), 235-241. https://doi.org/10.1016/j.supflu.2004.08.004
  13. Tedjar, F., Foudraz, J.C., Desmuee, I., Pasquier, C. and Martorana, S. (2010), "Method for integral recycling for cathode ray tubes", Patent US 20100062673.
  14. Tooru, T., Aketomi, T., Takayuki, S., Nobuhiro, N., Shinji, H. and Kazuyoshi, S. (2001), "Separation and recovery of rare earth elements from phosphor sludge in processing plant of waste fluorescent Lamp by pneumatic classification and sulfuric acidic leaching", J. Min. Mat. Process. Inst. JPN, 117(7), 579-585.
  15. Yang, F., Kubota, F., Baba, Y., Kamiya, N. and Goto, M. (2013), "Selective extraction and recovery of rare earths from phosphor powders in waste fluorescent lamps using an ionic liquid system", J. Haz. Mater. 254-255, 79-88. https://doi.org/10.1016/j.jhazmat.2013.03.026

Cited by

  1. Treatment of WEEE industrial wastewaters: Removal of yttrium and zinc by means of micellar enhanced ultra filtration 2017, https://doi.org/10.1016/j.wasman.2017.12.018
  2. Secondary yttrium from spent fluorescent lamps: Recovery by leaching and solvent extraction vol.168, 2017, https://doi.org/10.1016/j.minpro.2017.09.017