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Fundamental Study of the Rare Earths Recycling Through the Pyrotetallurgical Route —Phase Relations and Crystallization Behavior of the CaO-SiO2-Nd2O3 System

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REWAS 2016

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Abstract

This study aims to investigate phase relations of the CaO-SiO2-Nd2O3 ternary system for high temperature recycling of Neodymium. The slag samples were equilibrated at 1500°C and 1600°C for 24h in Ar, and quenched in water. From the phase analysis of the samples, the isothermal sections were partially constructed and the liquid stability regions were assessed. Based on the identified phase relations, a solidification process with different cooling paths was studied in-situ using a confocal scanning laser microscope within the interesting slag phase regions for recycling. The phases needed for optimizing recycling can be produced accordingly.

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Author information

Authors and Affiliations

  1. Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg 44 bus 2450, B-3001, Heverlee (Leuven), Belgium

    Thu Hoai Le, Annelies Malfliet, Bart Blanpain & Muxing Guo

Authors
  1. Thu Hoai Le
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  2. Annelies Malfliet
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  3. Bart Blanpain
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  4. Muxing Guo
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Editor information

Editors and Affiliations

  1. Department Materials Engineering of KU Leuven, Belgium

    Bart Blanpain (full professor, co-director for the I/UCRC ‘Center for Resource Recovery and Recycling’, co-editor-in-chief for the Journal of Sustainable Metallurgy) (full professor, co-director for the I/UCRC ‘Center for Resource Recovery and Recycling’, co-editor-in-chief for the Journal of Sustainable Metallurgy)

  2. Umicore Precious Metals Refining, Hoboken, Belgium

    Christina Meskers (senior manager and leading the Market Intelligence and Business Research team) (senior manager and leading the Market Intelligence and Business Research team)

  3. Department of Materials Science and Engineering, MIT, USA

    Elsa Olivetti (Thomas Lord Assistant Professor) (Thomas Lord Assistant Professor)

  4. Worcester Polytechnic Institute (WPI), USA

    Diran Apelian (Alcoa-Howmet Professor of Engineering and Founding Director of the Metal Processing Institute (MPI) & Brajendra Mishra (Kenneth G. Merriam Distinguished Professor of Mechanical Engineering and Assoc. Director of the Metal Processing Institute, Director of the National Science Foundation’s Industry/University Collaborative Research Center on Resource Recovery & Recycling) (Alcoa-Howmet Professor of Engineering and Founding Director of the Metal Processing Institute (MPI) &  (Kenneth G. Merriam Distinguished Professor of Mechanical Engineering and Assoc. Director of the Metal Processing Institute, Director of the National Science Foundation’s Industry/University Collaborative Research Center on Resource Recovery & Recycling)

  5. Purdue University, USA

    John Howarter (assistant professor in materials engineering) (assistant professor in materials engineering)

  6. SINTEF, Norway

    Anne Kvithyld (senior research scientist) (senior research scientist)

  7. IND LLC, USA

    Neale R. Neelameggham (‘The Guru’) (‘The Guru’)

  8. Argonne National Laboratory, USA

    Jeff Spangenberger (engineering specialist, Sr) (engineering specialist, Sr)

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© 2016 TMS (The Minerals, Metals & Materials Society)

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Le, T.H., Malfliet, A., Blanpain, B., Guo, M. (2016). Fundamental Study of the Rare Earths Recycling Through the Pyrotetallurgical Route —Phase Relations and Crystallization Behavior of the CaO-SiO2-Nd2O3 System. In: Kirchain, R.E., et al. REWAS 2016. Springer, Cham. https://doi.org/10.1007/978-3-319-48768-7_14

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