Thermal Coal
We 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% |