A wet ball mill 1 m 1 m was ... a. gupta, d.s. yan, in mineral processing design and operation, . 9.2.4 mill speed. during normal operation the mill speed tends to vary with mill charge. according to available literature, the operating speeds of ag mills are much higher than conventional tumbling mills and are in the range of 80–85% of.Apr 27, linner for ball mill to grind quartz. ball mill design/power calculation. the basic parameters used in ball mill design (power calculations), rod mill or any tumbling mill sizing are; material to be ground, characteristics, bond work index, bulk density, specific density, desired mill tonnage capacity dtph, operating % solids or pulp density, feed size as f80 and maximum 'chunk.