Rod grinder gets its name because its grinding body inside the barrel is steel bar. Rod grinder, as first-class ore grinding machine, can be applied in ore beneficiation plant and power sector in chemical plant. Rod grinder is also called rod mill or grinding rod mill.
Working Principle of Rod Grinder
Rod grinding machine works by relying on the moderative motion of peripheral rack wheel through electrical machine and reducer or the bradytelic synchronous electrical machine. The barrel is driven by those motions, so it is also called rotary rod mill. There is proper ore grinding medium inside the barrel, namely steel bar. Under the functions of centrifugal force and frictional force, ore grinding medium is raised to a certain height and then falls in drop or draining falling state. The ground material is fed into the barrel from the feeding port and crushed by the moving grinding medium. At last, the final materials are discharged to the next procedure under the overflow and continuous feeding force.
When the ore is fed into the rod mill, the coarse ore is at the feeding port but the fine ore is at the discharging port. Consequently, the bar group cannot keep balanced but stay slant, which is also the reason to limit the length of rod bar.
The general ore grinding process in most overseas ore beneficiation plants is made up of crusher, rod mill and ball mill. The rod mill is hardly used in China ore beneficiation plant. The feeding particle of ball mill is too high, which causes the large consumption of energy, grinding medium and lining plate. In addition, the grinding efficiency is relatively higher, product granularity is evener and the over crushing phenomenon is less.