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sbm coal grinding largest ball sizeBall Size For Coal Grinding Ball mill for grinding coal Exploring ball size distribution in coal grinding mills.ρ charge = total coal mass + ball mass j ∗ mill volume.α is the angle of repose,which is estimated to be about 35.Conchamathematical model of ball wear in grinding mills: i. Exploring ball size distribution in coal grinding mills, The steady state ball size distribution in the mill depends on the top up policy The effect of the ball size distribution on the milling rate of coal has been measured as a function of ball size distribution The change in ball size distribution as affected by wear and ball top up policy has been modelled Pressurised coal ball mill YouTube Sep 07,2016 · This video is unavailable.Watch Queue Queue.Watch Queue Queue Exploring ball size distribution in coal grinding mills. 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