... Specificationφ20,φ25,φ30,φ40,φ50,φ60,φ70,φ80,φ90,φ100,φ110,φ120,φ127,φ135NameLow Chromium Alloyed Cast Grinding BallPlace of ... /tonCoalhigh ash content100-200 g/tonMedium hardness ore400-600 g/tonCoallow ash content40-100 g/tonLow hardness ore100-400 g/tonCement30-100 g/tonRemark: the above specification ...