Hard Coke Lumps / Coal
We exclusively trade thermal coal of Indonesian origin and offer three main calorific values – GAR 4200 kcal/kg, NAR 4700 kcal/kg and NAR 5500 kcal/kg. The table below indicates the typical specifications of each category of coal under the American Society for Testing and Materials Standard.
| Specification in ASTM Standard | Low Calorific Value | Medium Calorific Value | High Calorific Value | |
|---|---|---|---|---|
| Gross Calorific Value | GAR | 4,200 Kcal/kg | 5,000 Kcal/kg | 5,800 Kcal/kg |
| Net Calorific Value | NAR | 3,800 Kcal/kg | 4,700 Kcal/kg | 5,500 Kcal/kg |
| Total Moisture | ARB | 36% | 26% | 14% |
| Inherent Moisture | ADB | Approximately 24% | 18% | 9% |
| Ash Content | ADB | 8% | 5% | 15% |
| Volatile Matter | ADB | Approximately 40% | 40% | 41% |
| Ash Fusion Temperature | T1 | 1,150 Degree Celsius | 1,150 Degree Celsius | 1,300 Degree Celsius |
| Total Sulfur | ADB | 0.8% | 0.9% | 0.6% |
| HGI | - | Minimum 45% | 40% | 40% |
| Size 0-50mm | - | Approximately 90% | 90% | 90% |
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