Classification of Coal by Rank (ASTM D388-12) | Special Topic | CKIC

Classification of Coal by Rank (ASTM D388-12)

July.27 Coal

Classification of Coal by Rank (ASTM D388-12)
Coal Rank		Fix Carbon Limits	Volatile Content	Gross Calorific Value Limits		Agglomerating Characteristics
		%	%	Btu/lb	MJ/kg
		dmmf	dmmf	Moisture mmf	moisture mmf
Antracite Class	Meta- Anthracite	≥98%	<2%			Non-agglomerating
	Anthracite	92 to 98%	2 to 8%
	Semi-Anthracite (Lean Coal)	86 to 92%	8 to 14%
Bituminous	Low Volatile Bituminous	78 to 86%	14 to 22%			Commonly agglomerating
	Medium Volatile Bituminous	69 to 78%	22 to 31%
	High Volatile A Bituminous	<69%	>31%	≥14,000	≥32.557
	High Volatile B Bituminous	<69%	>31%	13,000 to 14,000	30.232 to 32.557
	High Volatile C Bituminous	<69%	>31%	11,500 to 13,000	26.743 to 30.232
	High Volatile C Bituminous		>31%	10,500 to 11,500	24.418 to 26.743	Agglomerating
Subbituminous	Subbituminous A coal			10,500 to 11,500	24.418 to 26.743	Non-agglomerating
	Subbituminous B coal			9,500 to 10,500	22.09 to 24.418
	Subbituminous C coal			8,300 to 9,500	19.30 to 22.09
Lignite	Lignite A			6,300 to 8,300	14.65 to 19.30	Non-agglomerating
Lignite	Lignite B			<6,300	<14.65	Non-agglomerating








Note : Calculating sulfur trioxide that is determined in accordance with ASTM D5016-08, dmmf:dry mineral-matter-free basis , moisture mmf : moisture mineral-matter free basis

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