The ball mill is a traditional coal pulverizer machine, which has been widely used since it was invented. In the cement plant, the new dry process cement manufacturing requires the moisture content of coal powder to be 0.5% ~ 1.5%, while that of raw coal is 1.5% ~ 4.0%. Therefore, the ball mill should have a drying function besides grinding. In order to enhance the drying ability, large ball mills are equipped with drying chambers.

Working Principle

During the operation of the ball mill, the raw coal first enters the drying chamber through the feed inlet for drying, and the dried raw coal enters the grinding chamber for grinding and second drying. The pulverized coal is taken out of the mill by hot air.

Advantages

Compared with the vertical roller mill, the advantages of air-swept ball mill are strong adaptability to raw coal quality, simple operation and low investment cost; the disadvantages are high power consumption and high noise.