Power coal refers to fuel coal used for direct combustion to generate power and heat energy, including coal used in power plant boilers and industrial boilers. Broadly speaking, all coal used for power generation aims at power generation, locomotive propulsion, building materials, boiler combustion, etc. It belongs to power coal, referred to as power coal for short. Brown coal, long flame coal, non-caking coal, weak caking coal, lean coal and gas coal with poor caking property all belong to the category of power coal. High-quality power coal generally refers to low ash (