Charcoal is highly carbonic hard porous material which is obtained in the process of heating wood without access of air (or in presence of minor amounts of air).
One cub. m of wood is required to produce 140-180 kg of charcoal, 280-400 kg of liquid products, and about 80 kg of combustible gases.
Recommended scope of use of charcoal:
Charcoal is used in grilles, braziers, hibachi grills, barbecue grills, etc.;
Charcoal is used as fuel in heaters, fireplaces, railway cars, and workmen’s cabins; and
Charcoal is used in manufacturing non-ferrous metals, glass and crystal.
- Charcoal combustion heat is 30000 to 35000 kJ/kg (7000 to 8100 kcal/kg);
- Birchwood charcoal density is 380 kg/m3; pine (300 kg/m3) and fur-tree (260 kg/m3) charcoals are less dense;
- High porosity of charcoal preconditions its good adsorption properties. Charcoal can combine with air oxygen at normal ambient temperatures. Thus, cases of self-combustion of charcoal are attributable to this capability of the material;
- Humidity of charcoal removed from furnaces and retorts is 2 to 4%;
- Charcoal ash content shall not exceed 3%; and
- Charcoal is characterized by low content of such admixtures as phosphorus and sulfur and, thus, this material plays the key role in some metallurgical processes.