The liner of a ball mill is a critical component protecting the mill body from impact and wear by the grinding media and materials. Its fixing method directly affects the safety and stability of the equipment's operation. The liner is typically bolted to the inner wall of the mill. During installation, holes are first drilled at the corresponding locations on the mill body. Then, specially designed liner bolts are passed through pre-drilled holes in the liner and extend into the outside of the mill body.

To prevent material leakage and cushion impacts, rubber or asbestos gaskets are often installed between the bolts and the liner, and between the liner and the mill body, providing sealing and cushioning. On the outside of the mill body, the bolt ends are equipped with nuts and anti-loosening devices, such as locking washers or double-nut structures, to withstand the strong vibrations generated during ball mill operation and prevent the nuts from loosening and falling off. Some designs also use countersunk or specially shaped bolt heads to make them flush with or embedded in the liner surface, reducing the risk of direct impact from the grinding media.

In addition, some large ball mills use wedge-shaped clamping strips or embedded structures for auxiliary fixing, utilizing mechanical interlocking forces to enhance stability. Regardless of the method, the core principle is to ensure a secure connection, good sealing, and easy replacement. Regularly checking the tightness of bolts and the wear of liners is essential for maintaining the efficient and long-lasting operation of ball mills. A scientifically designed fixing structure not only extends the service life of the mill cylinder but also ensures the continuity and safety of the production process.