| Factor | Level | ||
| 1 | 2 | 3 | |
| Collector (ppm) | 100 | 200 | 300 |
| Frother (ppm) | 50 | 100 | 150 |
| Depressant (ppm) | 100 | 200 | 300 |
| Solid to Liquid ratio wt% | 5 | 10 | 20 |