Coal Specifications
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Coal Grade Specifications 2021
Washed Coal Nuts
Size
+20 – 50 mm
Inherent moisture %
0.8 – 1.8
Total moisture %
2.5 – 4.5
Ash %
16-22
Volatile Matter %
18 – 21
Fixed Carbon %
59.2- 61.2
Phosphorous % (Average)
0.0025
Total Sulphur %
0.2 – 1.5
Gross Calorific Value (kcal/kg)
5948 – 6507
Washed Coal Peas
Size
+10 – 20 mm
Inherent moisture %
0.8 – 1.8
Total moisture %
2.5 – 7.5
Ash %
16-22
Volatile Matter %
18 – 21
Fixed Carbon %
59.2- 61.2
Phosphorous % (Average)
0.0025
Total Sulphur %
0.2 – 1.5
Gross Calorific Value (kcal/kg)
5948 – 6507
Washed Coal Fines
Size
+0.5 – 10 mm
Inherent moisture %
0.8 – 2.0
Total moisture %
5.0 – 12.0
Ash %
16-22
Volatile Matter %
18 – 21
Fixed Carbon %
59.2- 61.2
Phosphorous % (Average)
0.0025
Total Sulphur %
0.2 – 1.5
Gross Calorific Value (kcal/kg)
5948 – 6507
Unwashed Coal Fines
Size
+0.5 – 10 mm
Inherent moisture %
0.8 – 1.7
Total moisture %
5.0 – 15.0
Ash %
20 – 30
Volatile Matter %
16 – 19
Fixed Carbon %
53.2 – 59.3
Phosphorous % (Average)
0.0025
Total Sulphur %
0.5 – 3.5
Gross Calorific Value (kcal/kg)
5202 – 6134
High Grade Coal
Size
-500 mm
Inherent moisture %
0.7 – 1.5
Total moisture %
2.0 – 5.5
Ash %
17 – 30
Volatile Matter %
15 – 20
Fixed Carbon %
54.3 – 61.5
Phosphorous % (Average)
0.0025
Total Sulphur %
0.2 – 5.0
Gross Calorific Value (kcal/kg)
5202 – 6414
Duff/ Slurry
Size
-0.5 mm
Inherent moisture %
0.9 – 1.2
Total moisture %
6.0 – 20.0
Ash %
6.0 – 20.0
Volatile Matter %
16 – 18
Fixed Carbon %
53.1 – 58.8
Phosphorous % (Average)
0.0025
Total Sulphur %
0.5 – 3.5
Gross Calorific Value (kcal/kg)
5202 – 5948