Anthracite is the most valuable coal. It has the highest calorific value. Athracite should be burned in pig-iron boilers with compulsory draught. It is used in ferrous and nonferrous metallurgy and in electric power industry.
|
Grade |
Ash, % |
Sulphur, % |
Max. Moisture, % |
Volatile matter, % |
CV, kcal/kg |
|
AK |
4.0-7.0 |
0.4-0.8 |
9 |
5.0 |
7000-7500 |
|
AO |
4.0-7.0 |
0.4-0.8 |
9 |
5.0 |
7000-7500 |
|
AKO |
4.0-7.0 |
0.4-0.8 |
9 |
5.0 |
7000-7500 |
|
AM |
6.0-10.0 |
0.4-0.8 |
10 |
5.0 |
6800-7200 |
|
AS |
13.0-15.0 |
0.4-0.8 |
13 |
7.0 |
6400-7000 |
.
