Anthracite is the highest rank coal and is characterized buy low volatile matter (always less than 10%) and high carbon content. It has a semi- metallic luster and is capable of burning without smoke. Semi- anthracite is coal midway between low volatile bituminous coal and anthracite.
(1-6 �?�?)
Ash content for dry condition
no more than 4 %
Volatile substances
no more than 3 %
Moisture
no more than 9.5 %
Lowest heat of combustion (GCF)
at least 7,200 kcal/kg
Total sulfur for dry condition
no more than 1 %
(0.2-1 �?�?)
Ash content for dry condition
no more than 30 %
Volatile substances
no more than 6 %
Moisture
no more than 10 %
Lowest heat of combustion
at least 5,000 kcal/kg
Total sulfur for dry condition
no more than 1 %
(6-13 �?�?)
Ash content for dry condition
no more than 4 %
Volatile substances
no more than 4 %
Moisture
no more than 8 %
Lowest heat of combustion
at least 7,200 kcal/kg
Total sulfur for dry condition
no more than 1 %
Trivia Content
no more than 18 %
(13-25 �?�?)
Ash content for dry condition
no more than 5 %
Volatile substances
no more than 3.5 %
Moisture
no more than 6.5 %
Lowest heat of combustion
at least 7,200 kcal/kg
Total sulfur for dry condition
no more than 1 %
Trivia Content
no more than 17 %
