Media to media contact for rods mills is linear rather than point to point (as with balls) and are much heavier. The larger feed tends to separate rods at the feed end such that larger particles are preferentially abraded. This leads to a narrower size distribution and significantly less slime compared to ball mills.
· Usually, a manufacturer indies types of the grinding media needs to be used in the data sheet to the mill (with the proviso that the mill is supplied with a fixed armor lining). Basically, recommended use grinding balls as grinding media for ball mills, because they have several advantages over other types of the grinding media (cylpebs, ellipsoid, rollers):