Coking Coal.
Low, Mid, and High Volatile for steel production.
Low Volatile Coking Coal
Parameter Dry Basis (%) Dry MAF (%)
Ash 7.52 –
Volatile Matter 21.14 21.95
Fixed Carbon 71.33 78.05
Total Moisture 3.67 –
Superficial Moisture – 3.12
Residual Moisture – 0.57
Sulfur 0.80 –
Rheological Property Value
Free Swelling Index (FSI) 8.0
Maximum Fluidity (ddpm) 471
% Dilatation / Contraction 0 / 0
Softening Start 421°C
Max Fluidity Temperature 454°C
Solidification End 495°C
Mid Volatile Coking Coal (Typical Ranges)
Parameter Dry Basis (%) Approx. MAF (%)
Ash 8.0–9.5 –
Volatile Matter 24.0–28.0 26.0–30.0
Fixed Carbon 65.0–68.0 70.0–73.0
Total Moisture 2.5–4.0 –
Sulfur 0.6–0.9 –
Phosphorus 0.01–0.03 –
Chlorine <0.05 –
Rheological Property Range
Free Swelling Index (FSI) 7.5–8.0
Maximum Fluidity (ddpm) 2000–4000
% Dilatation / Contraction 0 / 0
Softening Range 430–490°C
High Volatile Coking Coal
Parameter Dry Basis (%) MAF (%)
Ash 10.17 –
Volatile Matter 33.99 37.08
Fixed Carbon 55.84 62.92
Total Moisture 2.88 –
Superficial Moisture – 1.76
Residual Moisture – 1.14
Sulfur 0.84 –
Rheological Property Value
Free Swelling Index (FSI) 7.0
Maximum Fluidity (ddpm) 9337
% Dilatation / Contraction 0 / 0
Softening Start 431°C
Max Fluidity Temperature 454°C
Solidification End 496°C