KLASIFIKASI BATUBARA

1. Berdasarkan Fuel Ratio

Tipe batubara dapat ditentukan berdasarkan nilai fuel ratio, dengan menggunakan rumus:

Fuel Ratio = Fixed Carbon/Volatile Matter

Fixed carbon = dan Volatile Matter = maka, Fuel Ratio =

Fuel Ratio =

Sumber: Frase (1877)

Tabel klasifikasi berdasarkan fuel ratio

Tipe	Fuel Ratio
Anthracite	100-12
Semi-antrachite	12-8
Semi bituminous	8-5
Bituminous	5-0

2. Berdasarkan American Society for Testing Material (ASTM)

Fixed Carbon =   

Volatile Matter =   

Calorific Value =

Sumber: Thomas (2020)

Tabel klasifikasi berdasarkan ASTM

Class	Group	Fixed Carbon	Volatile Matter	Calorific Value
Anthracite	Meta anthracite	›=98	‹=2
Anthracite	antrachite	92-98	2-8
Anthracite	Semi antrachite	86-92	8-14
Bituminous	Low volatile bituminous coal	78-86	14-22
Bituminous	Medium volatile bituminous coal	69-78	22-31
Bituminous	High volatile A bituminous coal	‹69	›31	›14000
Bituminous	High volatile B bituminous coal			13000-14000
Bituminous	High volatile C bituminous coal			11500-13000
Subbituminous	Subbituminous A coal			10500-11500
Subbituminous	Subbituminous B coal			9500-10500
Subbituminous	Subbituminous C coal			8300-9500
Lignite	Lignite A			6300-8300
Lignite	Lignite B			‹6300

3. Berdasarkan Klasifikasi Batubara China

Volatile Matter (%, daf) =  

Caking index GRL =  

Plastic layer y (mm) =

Dilatometer b (mm) =

Moisture (%) =

Gross CV (Mj/kg, maf) =

Sumber: Thomas (2020)

Tabel klasifikasi berdasarkan klasifikasi batubara China

Symbol	Coal type (abbr)	Volatile Matter (%, daf)	Caking index GRL	Plastic layer y (mm)	Dilatometer b	Moisture (%)	Gross CV(MJ/kg, maf)
WY	Anthracite	(1)0-3.5
WY	Anthracite	(2)3.5-6.5
WY	Anthracite	(3)6.5-10
PM	Meagre coal	›10-20	‹5
PS	Lean meagre coal	›10-20	5-20
SM	Lean coal	›10-20	20-65
JM	Coking coal	›20-28	›20-65	‹25	(‹150)
JM	Coking coal	›10-20	›65
FM	Fat coal	›10-37	›85	›25
1/3JM	1/3 Cooking coal	›28-37	›65	‹25	(‹220)
QF	Gas and fat coal	›37	›85	›25	220
QM	Gas coal	›28-37	›50-65	‹25	‹220
QM	Gas coal	›37	›35-65
1/2ZN	1/2 Middle Sticky coal	›20-37	›30-50
RN	Weak sticky coal	›20-37	›5-30
BN	Un-sticky coal	›20-37	‹5
CY	Long flame coal	›37	‹5
HM	Brown coal	(1)›37				‹30	24
HM	Brown coal	(2)‹37				›30-50

4. Berdasarkan United Nation

Gross CV (MJ/kg, maf) =  

Moisture (%, ar) =  

Rro (%) =

Sumber: Thomas (2020)

Tabel klasifikasi berdasarkan fuel ratio

Coal type	Gross CV (MJ/kg, maf)	Moisture (%, ar)	Rro (%)
Low rank C (ortholignites)	‹15.0	‹75
Low rank B (meta-lignites)	15-20
Low rank A (subbituminous)	20-24		‹0.6