Considerations for Designing the Liner of Wet Ball Mill

Wet ball mill is the key equipment in ore dressing production line, and liner is the most important part of ball mill. If the liner is damaged, the whole production line will be affected. So the design and manufacture of liner is very important. Since liner is a wearing part, it must be easy to replace and has high wear resistance. The followings are some considerations for the design of wet ball mill’s liner.

1. Liner is not suitable for overweight. Its best weight is below 60kg to reduce the labor intensity on the installation. In addition, the average thickness of liner is 40~50mm. For the fine grinding warehouse, its liner can be made much thinner to increase the effective capacity of the wet ball mill.

2. The axial length of liner is the integral multiples of 50mm. The circumferential and axial value should be determined on the basis of the installation. Ensure that bolts can be installed and removed from these holes freely. But the bolt holes should not be too big so as not to weaken the strength of shell. Generally, the axial length is around 500mm, and the length of half block is about 250mm.

3. The quantity of liner must be the integral multiples of 100mm. The circumferential arc size must be not too big or small. At present, uniform circumferential dimension is 314mm at home. Besides, due to geometry deviation of the castings and impact deformation, there must be a gap of 5~8mm left around the liner. The actual size of the liner is the nominal size minus reserved space.

4. When inset liner for fine cartridge of wet ball mill, its size must be as small as possible. In addition, make some narrow "gap filling" whose width is two-thirds, one-third or one-second rimes of the standard-width to filling joints.