Machine-made charcoal is the use of machine charcoal machines to produce bamboo, wood sawdust, corner waste, peanut shells and other carbon-containing substances through crushing, drying, extrusion molding, carbonization and other processes to produce rod-shaped charcoal.
Compared with ordinary charcoal, machine-made charcoal has good mechanical strength, high carbon content, large calorific value, small ash content, long burning time (generally 2 to 4 times that of ordinary charcoal), and is smokeless and odorless. . According to the difference in carbonization process and closing temperature, machine-made carbon can be divided into low-temperature carbon, medium-temperature carbon and high-temperature carbon.
Low-temperature charcoal-charring with a closed flame temperature <420℃, lighter carbon, lighter mechanical strength, poor surface strength, more surface cracks, lower carbon content and calorific value, volatile content ≥20%, flame height ≥15cm when burning .
Medium-temperature charcoal–The flame-off temperature of carbonization is greater than 420℃, but less than 600℃. The carbon is moderate, weighty, specific gravity ≤ water specific gravity, mechanical strength is better than the former, less cracks and finer, carbon content ≥75%, calorific value ≥7200 calories, ash content ≤6%, volatile matter ≤15%, burning When the flame height is less than or equal to 10cm.
High-temperature charcoal–The carbonized flame is ≥700℃, which is made by refining. The carbon is hard, the specific gravity is ≥1 g/cm3, and it is submerged in water. High mechanical strength, steel sound when struck, most of them are conductive. Carbon content ≥80%, up to 90%, calorific value ≥7500 kcal, ash content ≤4%, volatile content ≤10%, the longest burning time, almost no flames can be seen.