AKO anthracite (50-100 mm)
Anthracite (from Latin anthracites, from others-Greek. ἄνθραξ "coal; carbuncle") is the oldest of the fossil coals, coal of the highest degree of carbonification (metamorphism).
The best grade of coal, characterized by black color, strong luster, high calorific value.
The highest type of coal is a solid combustible mineral formed from plant residues as a result of humification and carbonification.
Charcoal is black and gray in color with a metallic luster, solid, high density and high electrical conductivity.
Anthracite can be considered as a transitional stage between coal and graphite. Anthracite deposits are most often found in areas that have been subjected to significant movements of the Earth's crust, such as spurs of mountain ranges. In the process of coalification, peat buried in the bowels of the Earth is successively transformed (under appropriate conditions) first into brown, then into coal and anthracite.
Technical Specification: Anthracite AKO grade coal (50-100 mm)
1. Particle sizes:
- Size range: 50-100 mm.
- The particle size distribution should correspond to the following values:
- The proportion of particles with a size of 50-70 mm: at least 80%
- The proportion of particles with a size of 70-100 mm: no more than 20%
2. Physical properties:
- Density: at least 1.35 g/cm3.
- Compressive strength: at least 7 MPa.
- Humidity: no more than 3%.
- Porosity: at least 45%.
3. Chemical composition:
- Ash content: no more than 5%.
- Sulfur content: not more than 0.8%.
- Volatile matter content: no more than 6%.
4. Thermal properties:
- Heat of combustion: not less than 27 MJ/kg.
- Softening temperature: at least 1450°C.
5. Certification:
- The products are certified in accordance with local and international coal quality standards.
Note: This specification is provided as an example and can be adapted to meet specific customer requirements or quality standards.