Metallurgical coal
Metallurgical coal is used in steel production is the focus of our coal trading operations.
It is used to make metallurgical coke which is used as a reducing agent in a blast furnace to temper iron ore into steel products.
It is used to make metallurgical coke which is used as a reducing agent in a blast furnace to temper iron ore into steel products.
Technical Specification for Hard Coking Coal
|
Technical Parameters |
Desired Specification |
Tolerance Limits |
1. |
Total Moisture (on ‘As received’ basis) |
8.0% Max |
12.0% Max |
2. |
Sulphur (BS 1016-1973) |
0.6% Max |
1.0% Max |
3. |
Crucible Swelling Number (CSN) (ISO/501-1974) |
5 Minimum |
5 Minimum |
4. |
Proximate Analysis (On “Air dried basis”) (BS 1016-1973 Part-3) |
|
|
Volatile Matter |
btw 20% – 32% |
btw 20% – 32% |
|
Ash |
8.0% Max |
10.0% Min |
|
5. |
i. Mean Max Reflectance of Vitrinite (ISO/7404) |
1.15 – 1.35 |
1.15 – 1.40 |
ii. Vitrinite Percentafge (ISO/7404) |
55% Min. |
50% Min. |
|
iii. Vitrinite Distribution (ISO/7404) |
80% Min. |
75% Min. |
|
6. |
Gieseler Plastometer Test (ASTM-D2639) Maximum Fluidity (ddpm) |
300 Min. |
300 Min. |