Abstract
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%.
| Original language | English |
|---|---|
| Pages | 705-711 |
| Number of pages | 7 |
| Publication status | Published - 2015 Jan 1 |
| Event | 13th International Symposium on East Asian Resources Recycling Technology, EARTH 2015 - Pattaya, Thailand Duration: 2015 Nov 1 → 2015 Nov 4 |
Other
| Other | 13th International Symposium on East Asian Resources Recycling Technology, EARTH 2015 |
|---|---|
| Country/Territory | Thailand |
| City | Pattaya |
| Period | 15-11-01 → 15-11-04 |
All Science Journal Classification (ASJC) codes
- Environmental Science(all)