Class
|
Group
|
Fixed
Carbon % , dmmf
|
Volatile
Matter Limits, % , dmmf
|
Calorific
Value Limits BTU per pound (mmmf)
|
||||
≥
|
Less
Than
|
Greater
Than |
≤
|
≥
|
Less
Than
|
Agglomerating
Character
|
||
I.
Anthracite
|
1.Meta-anthracite
|
98
|
2
|
Non-
agglomerating
|
||||
2.Anthracite
|
92
|
98
|
2
|
8
|
||||
3.Semianthracite C
|
86
|
92
|
8
|
14
|
||||
II.
Bituminous
|
1.Low
volatile bituminous coal
|
78
|
86
|
14
|
22
|
Commonly
Agglomerating
|
||
2.Medium
volatile bituminous coal
|
69
|
78
|
22
|
31
|
||||
3.High
volatile A bituminous coal
|
69
|
31
|
14000
|
|||||
4.High
volatile B bituminous coal
|
13000
|
14000
|
||||||
5.High
volatile C bituminous coal
|
11500
|
13000
|
Agglomerating
|
|||||
10500
|
11500
|
|||||||
III. Sub-
bituminous
|
1.Subbituminous
A coal
|
10500
|
11500
|
Non-
agglomerating
|
||||
2.Subbituminous
B coal
|
9500
|
10500
|
||||||
3.Subbituminous
C coal
|
8300
|
9500
|
||||||
IV. Lignite
|
1.Lignite A
|
6300
|
8300
|
|||||
1.Lignite B
|
6300
|
Senin, 21 Januari 2013
Metode ASTM (American Standard Testing Material)
10.36
bro
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Metode
ASTM (American Standard Testing
Material)
Dalam penentuan jenis tingkatan batubara menurut klasifikasi
ASTM ini didasarkan atas persentase karbon padat dan nilai kalori (dalam
btu/lb), yang dihitung berdasarkan basis Dry Mineral Matter Free (dmmf)
Tabel Klasifikasi Batubara Berdasarkan ASTM
Sumber : Annual Book of ASTM Standard
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