The Rod Mill is the same as the Ball Mill in the construction and available to both of wet and dry processing. Unlike the Ball Mill, however, the Rod Mill uses rods instead of balls as the grinding medium. As a result, its uses are different from those with the Ball Mill. In other words, the Rod Mill gives impact on and grinds coarse particles present between each rod, while no fine particles receive impact and are ground. Therefore, the Rod Mill causes no excessive grinding, enabling you to produce products of relatively sharp particle size distribution curve.
Features
The Rod Mill is a grinding mill used for coarse grinding or fine grinding, which offers the following types and uses.
1) Peripheral Discharge Type
1. Wet grinding type (E.P.D. type and C.P.D. type)
This type of mills is used to produce products of relatively coarse particles such as fine aggregate for concrete (e.g. sand making). Normally, it is available not only to produce a variety range of products from feeds of less than 20 to 30 mm in diameter to products of some 5 mm or less in diameter but also make adjustments of particles size of natural sand. The rod mills, which have a discharge port in one end of the shell, are called "End Peripheral Discharge Type" (E.P.D. type as per Fig.1), while those having a discharge port in the center of the shell are called "Center Peripheral Discharge Type" (C.P.D. type as per Fig. 2). Materials are fed through one end opposite to the discharge end on the former type and through both ends of the shell on the latter type.