| 학회 | 한국화학공학회 |
| 학술대회 | 2012년 봄 (04/25 ~ 04/27, 제주 ICC) |
| 권호 | 18권 1호, p.138 |
| 발표분야 | 공업화학 |
| 제목 | Leaching of NdFeB magent scarp |
| 초록 | Currently, large amounts of scarp form NdFeB magnet manufacture are stockpiled owing to the lack of a cost-effective processing method. Because of the growing new market for individual rare-earth metals such as Nd and owing to the likely continuing increase in demand for permanent magnets, scrap treatment will undoubtedly become an important alternative materials source. Development of a viable method to process NdFeB scarp will aid manufacturers economically and reduce the necessity of consuming rare-earth materials. In the present study, Nd was recovered from NdFeB scrap. To dissolution Nd and Fe, scrap was oxidizing-roasted and leached in sulfuric acid solution. Nd and Fe was separated using double-salt precipitation method by the addition of sodium sulfate to leach liquor. Optimized temperature of oxidizing-roasting was 500℃ for sintering magnet and 700℃ for bonded magnet. When oxidizing-roasted NdFeB magnet was treated in 2M sulfuric acid at 50℃ for 2hr with the pulp density of 15%, 99.4% of Nd and 95.7% of Fe was leached and recovered. |
| 저자 | 윤호성, 정경우, 김철주 |
| 소속 | 한국지질자원(연) |
| 키워드 | |
| 원문파일 | 초록 보기 |
