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of ball mill and ball motion under the influence of coal load are analyzed Appropriate working speed should ensure that balls can reach the greatest dynamic impact kinetic energy Eni¼ is calculated by the following equation since D¼ 17 Q. H. Li Ore Crushing and Grinding Metallurgical Industry Press Beijing 1980

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historically for overflow ball mills for which the LID ratio has increased ably due to reduced direct impact in the presence of a pool. d Increased circulating plex nature of the dynamic ball load which has three zones: the rising the falling Taggart A. F. 1927 Handbook of Ore Dressing Section 4 Wiley. New York. pp.

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