Category of Coal

As per the Colliery Control Rule 2004, Coal Controller Organisation (CCO) is the statutory body under Government of India who regulates the classification/categorisation/grading of coal mined in India.  As per the said provisions, Coal Controller shall lay down the procedure and method of sampling and analysis of coal for the purpose of declaration and maintenance of grade mined in a colliery.  This was stated by Sh. Piyush Goyal, Minister of state for Power, Coal & New and Renewable Energy (Independent Charge) in a written reply to a question in the Lok Sabha today. Following the procedure laid down by CCO the grades of coal seams at different collieries are declared every year.  Different categories / qualities of coal are being produced by Coal India Limited.  They are mainly (i) non-coking coal where grading is based on Gross Heat content (ii) Coking Coal where grading is based on ash % and (iii) Semi coking coal and weakly coking coal where grading is based on ash and moisture %.  Details are given below:-. 

(i)             Non-Coking Coal

Grade of Coal	Range of Gross Calorific Value  In Kilo Calories	Grade of Coal	Range of Gross Calorific Value  In Kilo Calories
G1	Greater than  7000	G2	Greater than  6700 and Less than 7000
G3	Greater than  6400 and Less than 6700	G4	Greater than  6100 and Less than 6400
G5	Greater than  5800 and Less than 6100	G6	Greater than  5500 and Less than 5800
G7	Greater than  5200 and Less than 5500	G8	Greater than  4900 and Less than 5200
G9	Greater than  4600 and Less than 4900	G10	Greater than  4300 and Less than 4600
G11	Greater than  4000 and Less than 4300	G12	Greater than  3700 and Less than 4000
G13	Greater than  3400 and Less than 3700	G14	Greater than  3100 and Less than 3400
G15	Greater than  2800 and Less than 3100	G16	Greater than  2500 and Less than 2800
G17	Greater than  2200 and Less than 2500

(ii)      Coking Coal

Grade	Ash Content ( %)
Steel – I	Upto 15
Steel- II	Exceeding 15 and upto 18
Washery. I	Exceeding 18 and upto 21
Washery. II	Exceeding 21 and upto 24
Washery. III	Exceeding  24 and upto 28
Washery. IV	Exceeding 28 and upto 35

(iii)     Semi Coking and Weakly Coking Coal

Grade	Ash + Moisture Content ( %)
Semi Coking-I	Not Exceeding  19 %
Semi Coking –II	Exceeding 19 % but not exceeding 24 %

 PIB