Rotor speed is one of the important working parameters of ultrafine vertical mill, which plays a decisive role in the capacity, particle size and crushing ratio of the crusher. The experimental results show that with the increase of rotor speed, the production capacity and crushing ratio of the ultrafine vertical mill increase significantly, and the particle size of the product will be relatively fine.

However, with the increase of rotor element, the power consumption increases, the wear of plate hammer accelerates, and the production cost increases. Therefore, in the production can not blindly pursue the high speed of the rotor, speed increase should be appropriate.