Proximate Analysis 

      Parameter

Basis

Unit 

Typical

Total Moisture

ARB

%

27.0

Air Dried Moisture

ARB
%
14.5
Ash
ARB
%
3.0
Volatile Matter
ARB
%
42
Fixed Carbon
ARB
%
40.5

Calorific Value

GAR

kcal/kg

4,900


NAR

kcal/kg

4,550

Total Sulphur

ARB

%

0.15
HGI


45


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Adaro Energy  is currently Indonesia's second largest thermal coal producer, operates the largest single coal mine in Indonesia, and is a significant supplier to the global seaborne thermal coal market.  Adaro has been mining coal from its coal concession area in the Tanjung region of Indonesia's South Kalimantan Province since 1991. The coal resource comprises more than 3 billion metric tonnes of mineable coal which is exceptionally clean at 0.1% sulphur and 1.2% ash. Because of these environmental attributes it has been
trademarked globally as "
Envirocoal™".The coal has been widely
used throughout Europe, Asia and the Americas in power plants
and industrial centers 
where environmental restrictions are
stringently controlled and 
as a blending coal with more common
high ash, high sulphur 
coals. Results have consistently
shown considerable environmental, ​economic and technical
benefits from using 
Envirocoal™.

Envirocoal™-WARA

Proximate Analysis 

      Parameter

Basis

Unit 

Typical

Total Moisture

ARB

%

33.5

Ash

ARB

%

5.0

Volatile Matter

ARB

%

31.5

Fixed Carbon

ARB

%

30.0

Calorific Value

GAR

kcal/kg

4,700


NAR

kcal/kg

4,350

Total Sulphur

ARB

%

0.5

HGI



45


Designed by nature for the 21st century, the mining conditions at PT Adaro's Envirocoal™ mine are superior.

  • Seam thickness ranges from 30 to 70 meters
  • Coal quality is uniform throughout the coal seams

  • Overburden is thin, keeping stripping ratios low

  • ​Reserves exceed two billion tonnes


​These optimum conditions result in high production levels, low mining costs and consistent coal quality. Of course, to maintain high production levels, a mine must be outfitted with the correct equipment. The Envirocoal™ mine uses the latest equipment selected for our specific mining conditions and the climate at the mine.

This enables Envirocoal™ to combine high production levels with excellent reliability. Coal is trucked from the Envirocoal™ mine to the barge loading facility, a distance of less than 75 kilometers, on a road built by Adaro to a river capable of handling 10,000 metric ton barges which transport the coal to the port. At the river trans-loading facility Envirocoal™ is crushed and loaded onto the barges for shipment downriver to the ship loading facilities.

Trans-loading Envirocoal™ into a vessel happens off-shore at Kalimantan, Indonesia, where vessels of up to 120,000 DWT can be loaded. Vessels can also be loaded at a new public bulk port and coal storage terminal at Pulau Laut, Indonesia, which is currently capable of loading vessels up to 80,000 DWT.

Mining and Transportation

Envirocoal™

Envirocoal™ 4700

Envirocoal™ E5000

Proximate Analysis %

        Parameter

%

Moisture (a.r)

 38

Moisture (a.d.b.)

25

​Ash (a.d.b.)

3

Volatile Matter (a.d.b.)

37

Fixed Carbon (a.d.b)

35

Calorific Value (a.d.b.)

4,950

Calorific Value (g.a.r.)

4,100

Total Sulphur

0.15

H.G.I

60