Table 2:
Fibre to dust ratios by unit
| Unit | Overall | Year of sampling | ||||||
|---|---|---|---|---|---|---|---|---|
| 1995 | 2007 | 2013/14 | ||||||
| Median Fibre to Dust Ratio | Range | Median Fibre to Dust Ratio | Range | Median Fibre to Dust Ratio | Range | Median Fibre to Dust Ratio | Range | |
| Mining | 1.09 | (0.15–5.29) | 1.37 | (0.15–5.29) | 0.85 | (0.43–2.13) | ||
| Mine dump | 0.69 | (0.06–2.09) | 0.53 | (0.06–1.7) | 1.28 | (0.27–2.09) | ||
| Drilling | 0.58 | (0.49–1.88) | 1.19 | (0.49–1.88) | 0.58 | (0.49–0.66) | ||
| Rail transport | 1.02 | (0.32–6.9) | 0.86 | (0.32–2.29) | 1.40 | (0.45–6.9) | ||
| Crushing and sorting – main | 0.56 | (0.13–5.6) | 3.08 | (0.57–5.6) | 0.54 | (0.13–2.78) | 0.68 | (0.27–1.14) |
| Crushing and sorting - drying and boiler | 0.71 | (0.25–3) | 1.53 | (0.4–2.31) | 0.75 | (0.28–3) | 0.59 | (0.25–1.03) |
| Crushing and sorting - dust chamber/bag house filter | 1.50 | (1.11–1.79) | 1.50 | (1.11–1.79) | ||||
| Enrichment – main | 1.01 | (0.22–3.78) | 0.78 | (0.6–1.39) | 1.15 | (0.33–3.78) | 0.64 | (0.22–3.48) |
| Enrichment - dust chamber/bag house filter | 1.84 | (1.08–3.25) | 1.84 | (1.08–3.25) | ||||
| Enrichment - dust/waste bunker | 0.56 | (0.41–2.68) | 0.50 | (0.41–0.69) | 1.63 | (0.58–2.68) | ||
| Final Product (packaging) | 1.09 | (0.21–5.18) | 1.57 | (0.91–1.85) | 1.16 | (0.21–5.18) | 0.68 | (0.59–1.21) |
| Laboratory | 1.19 | (0.79–1.88) | 1.19 | (0.79–1.88) | ||||