Why is coal spontaneous combustion?
The spontaneous combustion of coal, especially those of low-grade bituminous coal, occurs when the heat absorbed from the environment is greater than the amount of heat released into the environment
The spontaneous combustion of coal is a poor accumulation of heat, the heat of the outer coal can be distributed, so the spontaneous combustion of coal is from the inside, and gradually expand outward
Coal heap in contact with air oxidation occurs, and emit heat. Coal oxidation reaction occurs after the coal pile temperature increases. The coal temperature increases, and the speed of coal oxidation was accelerated. In this way, the temperature makes the coal pile increasing. When the temperature exceeds the coal self ignition when will the spontaneous combustion
