ICI-1
Highest heat6,500kcal/kg GAR · ≈ 6,200 NAR
Sulphur≤ 1.0%
Ash≤ 13%
Total moisture12 – 15%
High-heat bituminous coal for buyers who want RB1-type energy from Indonesia.
Photo: Wolfgang Vrede / Unsplash
Imported · Kalimantan & Sumatra, Indonesia
Indonesian coal: five grades from 6,500 to 3,400 GAR.
Indonesian thermal coal is low in sulphur and ash and is sold in five index grades, ICI-1 to ICI-5. The higher the grade, the more heat and the less moisture — ICI-2 at 5,800 GAR is the closest match to RB2.
- Heat value
- 3,400 – 6,500kcal/kg GAR
- Sulphur
- 0.5 – 1.0%low across grades
- Ash
- 6 – 13%lower than RB2
- Supply
- Regularby sea, grade by GAR
Grades
The five Indonesian grades
Indonesian Coal Index grades are quoted on a gross basis (GAR). Net heat (NAR) is roughly 300 – 400 kcal lower, and moisture climbs as the grade falls.
ICI-2
RB2 equivalent5,800kcal/kg GAR · ≈ 5,500 NAR
Sulphur0.8% (0.8 – 1.0)
Ash8% (8 – 10)
Total moisture15% (15 – 18)
Net heat close to RB2 with much lower ash. A strong boiler and blending coal.
ICI-3
Mid range5,000kcal/kg GAR · ≈ 4,600 NAR
Sulphur≤ 0.8%
Ash≤ 8%
Total moisture25 – 30%
Balanced price and heat for boilers that handle higher moisture.
ICI-4
Value4,200kcal/kg GAR · ≈ 3,800 NAR
Sulphur0.6%
Ash7%
Total moisture35%
The most traded Indonesian grade worldwide. Cheap heat, very low sulphur.
ICI-5
Lowest cost3,400kcal/kg GAR · ≈ 3,000 NAR
Sulphur≤ 0.5%
Ash≤ 6%
Total moisture40 – 45%
Low-rank coal for large boilers designed for wet fuel.
Specification
Grade table (index specification and typical offers)
| Grade | GAR (kcal/kg) | NAR (approx.) | Total moisture | Ash | Sulphur |
|---|---|---|---|---|---|
| ICI-1 | 6,500 | ≈ 6,200 | 12 – 15% | ≤ 13% | ≤ 1.0% |
| ICI-2 | 5,800 | ≈ 5,500 | 15% (15 – 18%) | 8% (8 – 10%) | 0.8% (0.8 – 1.0%) |
| ICI-3 | 5,000 | ≈ 4,600 | 25 – 30% | ≤ 8% | ≤ 0.8% |
| ICI-4 | 4,200 | ≈ 3,800 | 35% | 7% | 0.6% |
| ICI-5 | 3,400 | ≈ 3,000 | 40 – 45% | ≤ 6% | ≤ 0.5% |
ICI-2 and ICI-4 follow the Platts index specifications; other grades show typical market offers. Volatile matter 35 – 45% (ADB), size 0 – 50 mm. Final quality per CoA.
Use cases
Where Indonesian coal works best.
Industrial boilers
Clean-burning, low-ash fuel for steam and process heat.
Low-sulphur blending
Blended with local coal to bring total sulphur down.
Textile & process plants
A cost-effective heat source for mills and processing units.
Cement (with RB2)
ICI-2 can share the kiln with RB2 where heat and moisture allow.
Supply route
From Indonesia to your plant
- 01Mine
Kalimantan and Sumatra open-pit mines
- 02Barge
River barges to loading anchorages
- 03Sea
Bulk vessel to Port Qasim / Karachi
- 04Yard
Discharge and dispatch through our network
- 05Delivery
By road to your plant with analysis records
Questions
Indonesian coal FAQ
Specifications are indicative. Final quality follows the certificate of analysis of each cargo or lot.
What are ICI-1 to ICI-5?
They are the five grades of the Indonesian Coal Index, from ICI-1 at 6,500 kcal/kg GAR down to ICI-5 at 3,400 GAR.
Which Indonesian grade is closest to RB2?
ICI-2 (5,800 GAR) is about 5,500 kcal/kg NAR — similar net heat to RB2, with lower ash but more moisture.
What is the difference between GAR and NAR?
GAR (gross as received) includes the heat used to evaporate water in the coal; NAR (net as received) does not. NAR is lower — for Indonesian coal by roughly 300 – 400 kcal/kg.
Why is moisture so high in lower grades?
Lower-rank Indonesian coals are younger and hold more water. That is why ICI-4 and ICI-5 are cheap per tonne but deliver less heat per tonne.
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