During the process of slicing and polishing on the permanent magnets, additional cooling agent would mix with the slurry and become rare earth containing slurry. There is around 100 tons of Nd-Fe-B magnets slurry annually in Taiwan. The analysis of the sample shows that spent Nd-Fe-B magnets slurry contains Nd, 24.31%, Fe, 73.22%, B, 1.46%, and thus, it is valuable to recover it. The purpose of this recycling process is to build an optimal hydrometallurgy process to recycle Nd-Fe-B magnets slurry and makes it into rare earth oxides as a final product. The process includes leaching (hydrochloric acid), precipitation, solvent extraction (P507), and calcination. The final product is rare earth oxide powder, purity is over 98%, and recovery rate is over 90%.
|出版狀態||Published - 2015 一月 1|
|事件||13th International Symposium on East Asian Resources Recycling Technology, EARTH 2015 - Pattaya, Thailand|
持續時間: 2015 十一月 1 → 2015 十一月 4
|Other||13th International Symposium on East Asian Resources Recycling Technology, EARTH 2015|
|期間||15-11-01 → 15-11-04|
All Science Journal Classification (ASJC) codes
- 環境科學 (全部)