Table 3.
Weight percentages obtained by EDS.
| Element | Before Test | Pit A | Pit B | Pit C | |||
|---|---|---|---|---|---|---|---|
| 1 | 2 | 1 | 2 | 1 | 2 | ||
| 2 wt.% sand fines concentration | |||||||
| C | 7.6 | 16.3 | 7.1 | 22.7 | 13.4 | 12.7 | 11.2 |
| O | - | 15.8 | 2.7 | 23.1 | 6.7 | 31.7 | 20.8 |
| Fe | 92.4 | 64.5 | 89.8 | 53.5 | 79.1 | 49.1 | 67.6 |
| Si | - | 1.8 | 0.4 | 0.2 | 0.3 | 3.9 | 0.3 |
| 5 wt.% sand fines concentration | |||||||
| C | 7.6 | 27.8 | 11.8 | 19.1 | 11.0 | 18.1 | 12.7 |
| O | - | 19.5 | 37.4 | 37.6 | 34.6 | 28.3 | 31.7 |
| Fe | 92.4 | 49.6 | 43.0 | 25.4 | 47.2 | 46.4 | 49.1 |
| Si | - | 1.8 | 4.1 | 15.4 | 4.1 | 3.5 | 3.9 |
| 10 wt.% sand fines concentration | |||||||
| C | 7.6 | 22.0 | 12.7 | 35.5 | 10.3 | 23.0 | 10.3 |
| O | - | 29.2 | 31.7 | 23.9 | 31.5 | 28.8 | 33.9 |
| Fe | 92.4 | 41.1 | 49.1 | 36.7 | 51.5 | 42.0 | 47.5 |
| Si | - | 4.0 | 3.9 | 2.1 | 3.9 | 2.4 | 4.1 |