Therefore, the use of ultrafine vertical mill to realize the secondary utilization of coal gangue is a good thing that has a good investment prospect and benefits the country and the people. After the coal gangue is superfinely ground, it is transformed into superfine coal gangue powder, which has great application value! Coal gangue ultra-fine powder can be used as building materials such as sintering porous bricks, making cement, blocks, etc. It can be used as a brick-making material to replace clay; it can be used for power generation; it can be used to produce low-calorific value gas; it can be used to make ceramics; it can be used to make soil improvement Agent. In addition, coal gangue coarse powder can be used for road paving, ground filling, etc.