S/L ratio | Leaching efficiency, % | ||||
Nb | Ta | REE | Ti | Zr | |
1/1 | 79 | 75 | 80 | 71 | 6 |
1/2 | 87.5 | 85 | 89 | 79 | 9 |
1/3 | 85.5 | 84 | 88 | 77 | 9 |