Temp., ˚C | Leaching efficiency, % | ||||
Nb | Ta | REE | Ti | Zr | |
80 | 64 | 61 | 64 | 69 | 4 |
120 | 70 | 71 | 70 | 72 | 5 |
160 | 80 | 80 | 82 | 77 | 8 |
200 | 87.5 | 85 | 89 | 79 | 9 |
240 | 77 | 79 | 87 | 72 | 10 |