Issue |
E3S Web Conf.
Volume 53, 2018
2018 3rd International Conference on Advances in Energy and Environment Research (ICAEER 2018)
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|
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Article Number | 04015 | |
Number of page(s) | 4 | |
Section | Environmental Protection, Pollution and Treatment | |
DOI | https://doi.org/10.1051/e3sconf/20185304015 | |
Published online | 14 September 2018 |
Recovery of Valuable Metals from Acoustic Magnet Swarf Slurry
1
Department of Resources Engineering, National Cheng Kung University, No.1, University Road, Tainan City, Taiwan
2
Graduate Institute of Environmental Engineering and Management, National Taipei University of Technology, Taipei, Taiwan
* Corresponding author: kuniwang@ntut.edu.tw, N46051114@ncku.edu.tw
Acoustic magnet swarf slurry (AMSS) has 1900 tons production worldwide. The composition of AMSS contained 12.45% neodymium, 34.35% iron, 0.48% boron and 52.5% of cooling reagent. Removing cooling reagent and decreasing iron dissolution percent were achieved by oxidation roasting and selective leaching. Selective leaching removed 89% of iron with parameter of 0.5M HCl, solid-liquid ratio equal to 1:100, 4 hours at 95℃. The rest of iron was separated by solvent extraction with Aliquat 336 as extractant. The optimal parameters of extracting iron were 0.1M A336, 3M chloride ion, aqueous-organic ratio equal to 1:3 and mixed for 1 minute. Oxalic acid added to solution after solvent extraction to precipitate neodymium. The final product was neodymium oxidize with 99% of purity by calcined neodymium oxalate at 900℃ for 0.5 hour. The recovery percent of neodymium was 99%.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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