A ball mill liner is a crucial wear-resistant component installed inside the cylinder of a ball mill. Its primary function is to protect the mill shell from abrasion and impact forces exerted by the grinding media and the processed material. Crafted from high-manganese steel, alloy steel, or rubber, the liner's design and profile are engineered to enhance grinding efficiency by optimally lifting the grinding media for effective cascading and impact. It significantly influences the mill's capacity, power consumption, and the overall particle size reduction process, making its selection and timely replacement vital for maintaining operational productivity and protecting the mill's structural integrity.