Ball Mill Design/Power Calculation - 911 MetallurgistApr 8, 2018 . 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 . The work index will also have a considerable variation across one ore body or deposit.ls ore grinding mill caculations,ls ore grinding mill caculations,Ore Grinding Mills - 911 MetallurgistMar 18, 2017 . Ore Grinding Mills are used for the fine grinding as the last step in the reduction of an ore prior to concentration (gravity or flotation) or cyanidation. Practice varies, depending upon the type of ore and the amount of reduction required. In addition, some of the older properties continue with methods that.