Indomining Thermal Coal Specification
The following specifications are measured in accordance with ASTM standards. The specification may vary overtime in line with the changes in mining sequences:
| Proxymate Analysis | | Typical | | Rejection |
|---|
| Calorific Value | GAR | kcal/kg | | 6,250 | | < 6,050 |
| Calorific Value | GAD | kcal/kg | | 5,800 | | < 5,600 |
| Calorific Value | NAR | kcal/kg | | 5,550 | | n/a |
| Total Moisture | GAD | % | | 19 | | > 22 |
| Inherent Moisture | GAD | % | | 12 | | n/a |
| Ash | GAD | % | | 4.5 | | > 8 |
| Volatile Matter | GAD | % | | 40 | | n/a |
| Total Sulphur | GAD | % | | 0.9 | | > 1 |
| Hardgrove Index | | | | 46 | | < 40 |
| Sizing | | Typical | | Rejection |
|---|
| 0 x 50mm | | % | | 100 | | < 95 |
| 0 x 2mm | | % | | 15 | | > 20 |
| Ash Fusion Temps. | | Typical | | Rejection |
|---|
| Initial Deformation | | oc | | 1780 | | < 1780 |
| Spherical | | oc | | 1300 | | < 1250 |
| Hemispherical | | oc | | 1320 | | |
| Flow | | oc | | 1350 | | |
| Ultimate Analysis | | Typical |
|---|
| Carbon | DB | % | | 75 |
| Hidrogen | DB | % | | 5 |
| Nitrogen | DB | % | | 1.7 |
| Oxygen | DB | % | | 18.3 |
| Ash Constituents | | Typical |
|---|
| SiO2 | DB | % | | 51.5 |
| AI2O3 | DB | % | | 26 |
| Fe2O3 | DB | % | | 14 |
| CaO | DB | % | | 2.5 |
| MgO | DB | % | | 1.3 |
| SO3 | DB | % | | 1.1 |
| SiO2 | DB | % | | 51.5 |
| TiO2 | DB | % | | 0.7 |
| Na2O | DB | % | | 0.1 |
| K2O | DB | % | | 1.4 |
| P2O5 | DB | % | | 1.1 |
| Other | DB | % | | 0.3 |
| Trace Elements | | Typical |
|---|
| Selenium | DB | ppm | | 0.5 |
| Boron | DB | ppm | | 150 |
| Arsenic | DB | ppm | | 2 |
| Chloride | DB | % | | 0.01 |
| Chlorine | | ppm | | 150 |
| Nickel | DB | ppm | | 180 |
| Flourine | | ppm | | 40 |
