Characteristics of lignite
The low coalification degree of lignite leads to a large amount of black ash floating during combustion. Burning lignite in large quantities without coal washing and refining is easy to cause serious air pollution.
The ignition point of lignite is not high, about 270? About, in dry and hot places, storage for about two months may easily lead to spontaneous combustion. In order to prevent too much loss, lignite is generally not more than two meters high when stacked.