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

Commodity: Indonesian Steaming Coal
Origin: Kalimantan, Indonesian
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

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

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

Inherent Moisture (ADB): 14.41%

Sulphur Content (ADB): 0.07%

Gross Calorific Value (ADB): 5673 kcal/kg

Size: 0 – 50mm

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

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

Steam coal

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