Neodymium resources recycling from spent magnets slurry

Chen Yao Hung, Wei-sheng Chen

Research output: Contribution to conferencePaper

Abstract

Since permanent magnet, the demand of permanent increase year by year. Permanent magnet have applied in multiple area, like wind turbine, magnetic resonance imaging (MRI), DVD players and voice coil motor (VCM). In Taiwan, the process of VCM product over 10 tons of Nd-contained slurry per year without suitable treatment. In this study, the analysis of raw material by ICP contained 24.5 wt% Nd, 71.5% Fe, 1% B. After leaching process, we will discuss the initial pH value, extractant, organic-aqua ratio and extractant concentration to get the optimal parameters to separate Fe and Nd. Next, the stripping process discuss the type of stripping agent and the concentration. In the last step, the purification process will be investigated. Using oxalic acid to obtain oxalic neodymium and after calcination process to get neodymium oxide. Finally, we could obtain over 90% recovery rate of Nd.

Original languageEnglish
Publication statusPublished - 2017 Jan 1
Event14th International Symposium on East Asian Resources Recycling Technology, EARTH 2017 - Sapporo, Hokkaido, Japan
Duration: 2017 Sep 262017 Sep 29

Conference

Conference14th International Symposium on East Asian Resources Recycling Technology, EARTH 2017
CountryJapan
CitySapporo, Hokkaido
Period17-09-2617-09-29

All Science Journal Classification (ASJC) codes

  • Environmental Science(all)

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  • Cite this

    Hung, C. Y., & Chen, W. (2017). Neodymium resources recycling from spent magnets slurry. Paper presented at 14th International Symposium on East Asian Resources Recycling Technology, EARTH 2017, Sapporo, Hokkaido, Japan.