The gradation of non-coking coal is based on Gross Calorific Value (GCV), the gradation of coking coal is based on ash content and for semi coking /weakly coking coal it is based on ash plus moisture content, as in vogue as per notification.
Grades of Coking Coal
| Grade |
Ash Content |
|---|
| Steel Grade - I |
Not exceeding 15% |
| Steel Grade -II |
Exceeding 15% but not exceeding 18% |
| Washery Grade -I |
Exceeding 18% but not exceeding 21% |
| Washery Grade -II |
Exceeding 21% but not exceeding 24% |
| Washery Grade -III |
Exceeding 24% but not exceeding 28% |
| Washery Grade -IV |
Exceeding 28% but not exceeding 35% |
| Washery Grade – V |
Exceeding 35% but not exceeding 42% |
| Washery Grade -VI |
Exceeding 42% but not exceeding 49% |
Grades of Semi-coking and Weakly Coking Coal
| Grade |
Ash+Moisture |
|---|
| Semi Coking Grade -I |
Not exceeding 19% |
| Semi Coking Grade -II |
Exceeding 19% but not exceeding 24% |
Grades of Non-coking Coal
| GCV BAND (K.Cal./Kg.) |
GRADE |
|---|
| Exceeding 7000 |
G-1 |
| Exceeding 6700 and not exceeding 7000 |
G-2 |
| Exceeding 6400 and not exceeding 6700 |
G-3 |
| Exceeding 6100 and not exceeding 6400 |
G-4 |
| Exceeding 5800 and not exceeding 6100 |
G-5 |
| Exceeding 5500 and not exceeding 5800 |
G-6 |
| Exceeding 5200 and not exceeding 5500 |
G-7 |
| Exceeding 4900 and not exceeding 5200 |
G-8 |
| Exceeding 4600 and not exceeding 4900 |
G-9 |
| Exceeding 4300 and not exceeding 4600 |
G-10 |
| Exceeding 4000 and not exceeding 4300 |
G-11 |
| Exceeding 3700 and not exceeding 4000 |
G-12 |
| Exceeding 3400 and not exceeding 3700 |
G-13 |
| Exceeding 3100 and not exceeding 3400 |
G-14 |
| Exceeding 2800 and not exceeding 3100 |
G-15 |
| Exceeding 2500 and not exceeding 2800 |
G-16 |
| Exceeding 2200 and not exceeding 2500 |
G-17 |
कोयला मंत्रालय
