Coal dust is coal powder resulting from extraction works in coal mines or from crushing coal after it has been extracted in special mills. A coal dust grain is about 5 millimeters in diameter .
Coal dust is used to power power stations and to make briquettes Coal is used to heat homes and run trains. It is cheap as it is produced from leftover coal . It is distinguished when used from molds in that it gives heat quickly and with high efficiency when needed. And electric power plants that use coal dust themselves prepare the powder inside their factories.
Coal dust , when mixed with air, is an explosive mixture , and care must be taken in its use so as not to cause explosion and fire. This requires great care when transporting and storing it.