The ball mill cylindrical screen is a crucial auxiliary equipment in the ball mill system, typically installed at the discharge end of the ball mill, used for classifying and screening the ground material. It consists of a rotating cylindrical screen, the surface of which is covered with sieve holes of a specific size. The material is usually wear-resistant stainless steel or polymer material to adapt to wear requirements under different working conditions.

During the ball milling process, ore, cement clinker, or other raw materials are struck and ground into fine powder by steel balls. However, not all particles reach the required fineness, and some coarse particles remain mixed in.  This is where the cylindrical screen performs its screening function: as the material is discharged from the ball mill, it enters the cylindrical screen. Under its slow rotation, the qualified fine powder passes through the sieve holes, while the unqualified coarse particles are retained inside the screen and returned to the ball mill for further grinding via a return device. This "closed-loop circulation" effectively improves grinding efficiency and product uniformity.

Furthermore, the cylindrical screen prevents large impurities from entering subsequent processes, protecting downstream equipment (such as pumps, pipes, and classifiers) from blockage or wear. In industries such as cement, metallurgy, chemical engineering, and mining, ball mill cylindrical screens are widely used due to their simple structure, stable operation, and convenient maintenance.

In summary, although the ball mill cylindrical screen does not directly participate in grinding, it plays an indispensable role in material classification, improving product quality, and ensuring the continuous operation of the system. It is an important supporting equipment in modern grinding processes.