... takes as an example of medium hardness iron ore with feed size less than 25mm. Technical Parameter: ModelBarrelmmBarrel volume (m3)Ball ... .549100380VGMQG21402100×400012.220.523.82200.8-0.07432-7.250200380VBall Mill, Mill Machinery, Grinding Mill, Raymond Mill, Cement Mill, Mill Machine, Mill Equipment, Rod Mill, Mine Mill, Powder Mill, Mineral Mill.