| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Recycling of Secondary, Byproduct Materials and Energy
|
| Presentation Title |
Recycling of Waste Neodymium Magnet trough Electrorefining of Molten Salt |
| Author(s) |
Xin Lu, Xinyuan Zhang, Aketagawa Mayu, Osamu Takeda, Hongmin Zhu |
| On-Site Speaker (Planned) |
Xin Lu |
| Abstract Scope |
According to the development of Electric Vehicles, demand for Neodymium (Nd) on neodymium magnets composed of Nd<sub>2</sub>Fe<sub>14</sub>B as a major phase increased rapidly. On the other hand, large amount of neodymium is contained in the waste neodymium magnets, and an efficient recycling of the neodymium from these secondary resources becomes crucial. In this study, recycling of the neodymium magnet wastes through electrorefining in molten chloride to produce Fe-Nd master alloy for the new magnet production was developed. The electrochemical behaviour of Nd<sup>3+</sup> in the molten chloride salt was firstly investigated. The selective separation of neodymium from the magnet wastes was achieved according to the extremely negative dissolution potential of neodymium (800 ºC: -3.00 V vs Cl<sub>2</sub>/Cl<sup>-</sup>) less than that of iron and boron. The dissolved Nd<sup>3+</sup> was efficiently recovered as a Nd-Fe alloy block through the co-deposition electrolysis of Fe<sup>2+</sup> by continuously introducing Fe<sup>2+</sup> into the electrolyte. |
| Proceedings Inclusion? |
Planned: |