Steam coal

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Steam Coal burned, primarily in boilers, to generate steam for the production of electricity or for process heating purposes, or used as a direct source of process heat. Steam coal, also known as thermal coal, refers to all coal not classified as coking (or metallurgical) coal.

GCV (ADB) means Gross Calorific Value on Air Dried Basis measured by using bomb calorimeter as per ASTM in Kcal/Kg.
Coal ARB: ARB or the As-Receive-Basis denotes the rough estimate of any kind of coal. On the other hand; Coal ADB: Air dried basis neglects the presence of moisture in the coal.

Indonesia steam coal (non-coking) standard specifications:

Parameter Specification Guarantee Rejection
Total Moisture ARB 40% >43%
Inherent Moisture ADB 13%
Ash Contents ADB 8% >10%
Volatile Matter ADB 38
Fixed Carbon ADB By Difference
Total Sulphur ADB 0.8% >1%
Gross Calorific Value ADB 5,400 Kcal/Kg < 5,200 Kcal/Kg
Hard Grind Index 45 – 50 index point
Size 0 – 50mm

Size 50 above

90%

10%

Summary

  1. Commodity: Indonesian Steaming Coal
  2. Origin: Kalimantan, Indonesian
  3. Port of Loading: South Kalimantan

 

Indonesia steam coal (non-coking ) specifications of different grades:

#5

Total Moisture (ARB): 37.1 %

Inherent Moisture (ADB): 15.4 %

Ash Content (ADB):1.1 %

Volatile Matter (ADB): 44.0 %

Fixed Carbon (ADB):39.5 %

Sulphur Content (ADB): 0.17%

Gross Calorofic Value (ADB): 5814 kcal/kg

Hardgrove Grindability Index (HGI ): N/A

Size: 0-50mm

 

#6

Total Moisture (ARB): 17.13%

Inherent Moisture (ADB): 13.70%

Ash Content (ADB):2.13%

Volatile Matter (ADB): 44.02%

Fixed Carbon (ADB): 40.15%

Sulphur Content (ADB): 2.11%

Gross Calorofic Value (ADB): 5965 kcal/kg

Hardgrove Grindability Index (HGI): N/A

Size: 0 – 50mm

 

#7

Total Moisture (ARB):  6.6 %

Inherent Moisture (ADB):3.6 %

Ash Content (ADB):18.7%

Volatile Matter (ADB): 40.3%

Fixed Carbon (ADB): 37.4%

Sulphur Content (ADB): 1.29%

Gross Calorific Value (ADB): 5579 kcal/kg

Hardgrove Grindability Index (HGI): 40

Size: 0 – 50mm

 

#8

Inherent Moisture (ADB): 14.41%

Sulphur Content (ADB): 0.07%

Gross Calorific Value (ADB): 5673 kcal/kg

Size: 0 – 50mm

 

#9

Inherent Moisture (ADB): 21.2 %

Ash Content (ADB): 21.9 %

Sulphur Content (ADB): 0.18%

Gross Calorific Value (ADB): 5409 kcal/kg

Size: 0 – 50mm

 

#10

Ash Content (ADB): 2.4 %

Sulphur Content (ADB): 0.23%

Gross Calorific Value (ADB ): 6864 kcal/kg

Size: 0 – 50mm

 

Steam Coal #2  

Indonesia steam coal (non-coking) specifications:

 

#11

Total Moisture (ARB): 29.8%

Inherent Moisture (ADB): 18.4%

Ash Content (ADB):  2.4%

Volatile Matter (ADB): 42.0%

Fixed Carbon (ADB): 37.2%

Sulphur Content (ADB):  0.23%

Gross Calorific Value (ADB): 5673 kcal/kg

Hardgrove Grindability Index (HGI): 36

Size: 0 – 50mm

 

#12

Ash Content (ADB): 6.2 %

Sulphur Content (ADB): 0.44%

Gross Calorific Value (ADB): 7315 kcal/kg

Hardgrove Grindability Index (HGI): N/A

Size: 0-50mm

 

#13

Total Moisture (ARB):   4.0 %

Inherent Moisture (ADB):   2.01%

Ash Content (ADB): 10.82%

Volatile Matter (ADB): 44.71%

Fixed Carbon (ADB): 42.46%

Sulphur Content (ADB):  0.44%

Gross Calorific Value (ADB): 7052 kca/kg

Hardgrove Grindability Index (HGI): 36

Size: 0 -50mm

 

#14

Total Moisture (ARB): 5.7 %

Inherent Moisture (ADB):3.5 %

Ash Content (ADB): 18.4%

Volatile Matter (ADB): 41.1%

Fixed Carbon (ADB): 37.0%

Sulphur Content (ADB):  0.8%

Gross Calorific Value (ADB): 6005 kcal/kg

Hardgrove Grindability Index (HGI): 69

Size: 0 – 50mm

 

#15

Total Moisture (ARB): 5.4%

Inherent Moisture (ADB):  3.1%

Ash Content (ADB): 14.7%

Volatile Matter (ADB): 43.4%

Fixed Carbon (ADB): 38.8%

Sulphur Content (ADB):  0.68%

Gross Calorific Value (ADB): 6529 kcal/kg

Hardgrove Grindability Index (HGI): 38

Size: 0 – 50mm

 

Steam Coal #3

Indonesia steam coal (non-coking) specifications :

#17

Total Moisture (ARB): 6.2%

Inherent Moisture (ADB): 3.0%

Ash Content (ADB): 19.3%

Volatile Matter (ADB): 39.9%

Fixed Carbon (ADB): 37.8%

Sulphur Content (ADB): 0.5%

Gross Calorific Value (ADB): 6021 kcal/kg

Hardgrove Grindability Index (HGI): 50

Size: 0-50mm

 

#18

Total Moisture (ARB): 4.3%

Inherent Moisture (ADB):2.7%

Ash Content (ADB): 10.2%

Volatile Matter (ADB): 45.7%

Fixed Carbon (ADB): 41.4%

Sulphur Content (ADB):  0.63%

Gross Calorific Value (ADB ): 6965 kcal/kg

Hardgrove Grindability Index (HGI ): 43

Size: 0 – 50mm

 

#19

Total Moisture (ARB): 4.5%

Inherent Moisture (ADB):2.9%

Ash Content (ADB):8.8%

Volatile Matter (ADB): 46.1%

Fixed Carbon (ADB): 42.2%

Sulphur Content (ADB): 0.77%

Gross Calorific Value (ADB) : 7118 kcal/kg

Hardgrove Grindability Index (HGI): 41

Size: 0 – 50mm

 

#20

Total Moisture (ARB): 4.5%

Inherent Moisture (ADB): 2.2%

Ash Content (ADB):8.1%

Volatile Matter (ADB): 49.1%

Fixed Carbon (ADB): 40.6%

Sulphur Content (ADB): 0.02%

Gross Calorific Value (ADB): 7292 kcal/kg

Hardgrove Grindability Index (HGI): 52

Size: 0 – 50mm

 

#21

Total Moisture (ARB): 9.7%

Inherent Moisture (ADB):5.2%

Ash Content (ADB) :8.2%

Volatile Matter (ADB):42.1%

Fixed Carbon (ADB): 44.5%

Sulphur Content (ADB): 0.63%

Gross Calorific Value (ADB): 6710 kcal/kg

Hardgrove Grindability Index (HGI): 35

Size: 0 – 50mm

 

Comparative chart:

THE COAL SPECIFICATIONS PRODUCED ARE AS PER ASTM / ISO STANDARD UNLESS INDICATED 

 PROXIMATE ANALYSIS UNITS TYPICAL GUARANTEED REJECTION
 AS RECEIVED BASIS
 Total Moisture % 7-12 11 >15 
 Gross Calorific Value Kcal/Kg
AIR DRIED BASIS
 Gross Calorific Value  6100-6500  6300  6100
 Moisture Analysis   %   16-20  17
 Ash   %   13-18  17
 Sulphur   %   1  0.8
 Volatile Matter   %   38-45  44
 Hard Grove Index  Point   45-52  50-52
 Size 0-50(100/200) mm   %   >90  To suit

 

PROXIMATE ANALYSIS

     DESCRIPTION

UNITS  TYPICAL GUARANTEED  REJECTION 
  AS RECEIVED BASIS        
 Total Moisture  %  25-32  30  >35
 Gross Calorific Value  Kcal/Kg      
 AIR DRIED BASIS        
  Gross Calorific Value  Kcal/Kg  5800  5500  <5500
  Moisture Analysis  %    14  
  Ash  %  3-8  8  >8
  Sulphur  %  0.4-1  0.8  >1
  Volatile Matter  %  39-44  42  
  Hard Grove Index  Point  44-52    
  Size 0-50(100/200) mm  %  100  To suit  

 

PROXIMATE ANALYSIS

DESCRIPTION

UNITS  TYPICAL GUARANTEED  REJECTION 
AS RECEIVED BASIS        
  Total Moisture % 25-32 28 >35
  Gross Calorific Value Kcal/Kg      
AIR DRIED BASIS        
  Gross Calorific Value Kcal/Kg 5500 5300 <5300
  Moisture Analysis %   15  
  Ash % 13-20 17 >20
  Sulphur % 0.4-0.9 0.8 >1
  Volatile Matter % 39-46 44  
  Hard Grove Index Point 45-54 52  
  Size 0-50(100/200) mm % 100 To suit  

 

 

Steaming (non-coking) Coal: Based on GCV Grading

 

GCV 6,300 – 6,100

 

Specification

 

Guaranteed

 

Rejection
Total Moisture (ARB)

 

16%

 

>20%
Gross Calorific Value (ADB)

 

6,300 kcal/kg

 

<6,100 kcal/kg
Ash (ADB)

 

10%

 

>12%
Inherent Moisture (ADB)

 

Volatile Matter (ADB)

 

44%

 

Total Sulphur (ADB)

 

<1% >1%
H G I

 

45

 

Size (0 x 50 MM)

 

90%

 

 

GCV 6,000 – 5,800

Specification

 

Guaranteed

 

Rejection
Total Moisture (ARB)

 

20% >22%
Gross Calorific Value (ADB)

 

6,000 kcal/kg <5,800 kcal/kg
Ash (ADB)

 

7% >10%
Inherent Moisture (ADB)

 

Volatile Matter (ADB)

 

38% >42%
Total Sulphur (ADB)

 

0.8% <0.9%
H G I

 

45
Size (0 x 50 MM)

 

90%

 

GCV 5,800 – 5,500

Specification

 

Guaranteed

 

Rejection
Total Moisture (ARB)

 

25% >28%
Gross Calorific Value (ADB)

 

5,800 kcal/kg <5,500 kcal/kg
Ash (ADB)

 

10% >12%
Inherent Moisture (ADB)

 

Volatile Matter (ADB)

 

41% >42%
Total Sulphur (ADB)

 

0.8% < 1%
H G I

 

43
Size (0 x 50 MM)

 

90% Minimum

 

GCV 5,500 – 5,300

Specification

 

Guaranteed

 

Rejection
Total Moisture (ARB)

 

37% > 40%
Gross Calorific Value (ADB)

 

5,500 kcal/kg <5,300 kcal/kg
Ash (ADB)

 

7% >10%
Inherent Moisture (ADB)

 

Volatile Matter (ADB)

 

39%
Total Sulphur (ADB)

 

0.6% < 1%
H G I

 

59
Size (0 x 50 MM)

 

90% Approx