Anthracite AM (13-25 mm)
The difference between the AM variety and the anthracite-kulak or anthracite nut variety consists in a smaller fraction size, namely 13-25 mm. The AM variety has a higher ash content compared to such varieties as AO and AK. This variety is more often purchased by the population for private needs, since due to the high ash content, the price of anthracite AM coal is significantly lower than for "nut" or "fist".
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Technical Specification: Anthracite AM grade coal (13-25 mm)
1. Particle sizes:
- Size range: 13-25 mm.
- The particle size distribution should correspond to the following values:
- The proportion of particles with a size of 13-18 mm: at least 80%
- The proportion of particles with a size of 18-25 mm: no more than 20%
2. Physical properties:
- Density: not less than 1.4 g/cm3.
- Compressive strength: at least 8 MPa.
- Humidity: no more than 3%.
- Porosity: at least 50%.
3. Chemical composition:
- Ash content: no more than 4%.
- Sulfur content: not more than 0.5%.
- Volatile matter content: no more than 5%.
4. Thermal properties:
- Heat of combustion: at least 29 MJ/kg.
- Softening temperature: at least 1500°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
1. Particle sizes:
- Size range: 13-25 mm.
- The particle size distribution should correspond to the following values:
- The proportion of particles with a size of 13-18 mm: at least 80%
- The proportion of particles with a size of 18-25 mm: no more than 20%
2. Physical properties:
- Density: not less than 1.4 g/cm3.
- Compressive strength: at least 8 MPa.
- Humidity: no more than 3%.
- Porosity: at least 50%.
3. Chemical composition:
- Ash content: no more than 4%.
- Sulfur content: not more than 0.5%.
- Volatile matter content: no more than 5%.
4. Thermal properties:
- Heat of combustion: at least 29 MJ/kg.
- Softening temperature: at least 1500°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