Rod mills are mainly used for primary grinding of crushed ore with a particle size range up to 50 mm for soft materials, and between 20 and 30 mm for harder materials where a narrow product size distribution is required (e.g. for subsequent gravity separation).
Rod mills create a coarser product than do ball mills and typically operate at a slower mill speed. Rod mills can be either wet or dry designs. Dry applications feature a peripheral discharge or an air-swept arrangement.
1. The discharging granularity of rod mill is evener and the output is higher.
2. The grinding media contact with the ore in a linear manner, so that it has selective grinding function.
3. When used for coarse grinding, the processing amount of rod mill is higher than that of the ball mill with the same specification.
4. Liner of ball mill is made of high-quality wear resistant material with high strength, wear resistance and long working life.