| Autor: |
Iryna Makarava, Aliaksandr Kasach, Dzmitry Kharytonau, Irina Kurilo, Markku Laatikainen, Eveliina Repo |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Minerals Engineering. 179:107446 |
| ISSN: |
0892-6875 |
| DOI: |
10.1016/j.mineng.2022.107446 |
| Popis: |
Development of the effective technology for recovery of critical rare-earth elements (REEs) from end-of-life permanent magnets is one of the important technological challenges. In this study, chemical and electrochemical leaching of NdCeFeB magnets was investigated in 0.5 mol/L sulfuric acid containing varying concentration of oxalic acid. The influence of H[2]C[2]O[4] concentration on leaching efficiency and morphological properties of the NdCeFeB surface, as well as on the chemical composition and ζ-potential of the oxalate precipitate particles was discussed. Efficient separation of REEs can be achieved at H[2]C[2]O[4] concentrations of 0.05–0.20 mol/L and the maximum REE purity was 97.2%. In electrochemical leaching, the leaching rate was substantially higher than in chemical leaching, where blocking of the magnet surface by precipitate layer was observed. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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