• Home
  • About us
  • CODE OF CONDUCT
  • SUSTAINABILITY
  • PRODUCTS
  • SERVICES
  • CAREERS
  • Contact

COAL


As-Received Basis (ar) As-Determined Basis (ad) Dry Basis (db) Dry Ash-Free Basis (daf)
Proximate Analysis Moisture %

Moisture (Total) Ash %

Moisture (as-determined) ISO Volatile Matter %

Fixed Carbon (calculation by difference) %

Total Sulfur %		 9.9

11.6

24.1

54.4

1.38		 4.4

12.3

25.6

57.7

1.46 		-----

12.9

26.8

60.3

1.53 		-----

-----

30.7

69.3

1.75


Gross Calorific Value kcal/kg 6163 6539 6840 7850
ISO 1928 Net CV, constant volume kcal/kg 5934 6330 6647 -------


NCV(v) requires H analysis
Ultimate Analysis
Moisture (Total) Moisture (as-determined) 		As-Received Basis (ar) As-Determined Basis (ad) Dry Basis (db) Dry Ash-Free Basis (daf)
Total Carbon % 65.8 69.8 73.0 83.8
Total Hydrogen (includes H in moisture) % 4.65 4.25 3.93 4.51
Total Nitrogen % 1.80 1.91 2.00 2.29
Total Sulfur % 1.38 1.46 1.53 1.75
Ash % 11.6 12.3 12.9 -----
Oxygen by diff.(includes O in moisture) % 14.77 10.28 6.64 7.65
Total % 100.00 100.00 100.00 100.00
Moisture % (9.9) (4.4) ------- -------
Hydrogen (excludes H in moisture) % 3.54 3.76 DB & DAF H & O values exclude
H & O in moisture
Oxygen (excludes O in moisture) % 5.98 6.37


As-Received Basis (ar) As-Determined Basis (ad) Dry Basis (db) Dry Ash-Free Basis (daf)
Total Chlorine % 0.008 0.008 0.008
Hardgrove Grindability Index 58


Size Distribution A. (air-dried basis)
Square holed Sieves used.		 Size Fraction Fractional Mass % Cumulative Mass % Retained Cumulative Mass % Passed
-mm +mm
50 0.9 0.9 99.1
50 25 30.9 31.8 68.2
25 10 30.7 62.5 37.5
10 6 13.3 75.8 24.2
6 2 10.6 86.4 13.6
2 1 4.7 91.1 8.9
1 0 8.9 100.0 0.0
Total 100


Ash Fusion Temperatures
 Reducing 
Initial Deformation Degree C. 1430
Spherical (Softening) Degree C. 1440
Hemispherical Degree C. 1450
Flow (Fluid) Degree C. 1460


Major and Minor Elements, in Ash (Dry Basis)
The Results of an ash constituent analysis do not necessarily total 100.0 %
SiO2 % 48.0
Al2O3 % 32.3
Fe2O3 % 9.4
CaO % 1.83
MgO % 0.21
Na2O % 0.07
K2O % 0.2
TiO2 % 2.0
MnO2 % 0.12
P2O5 % 0.53
SO3 % 4.74
Total % 99.4