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different liner designs at different mill speed but with constant filling degree 30% Indeed as explained previously at a mill stop the measurement of ball charge filling degree could be undertaken and will provide the static media charge angle βstatic = 143° An online measurement of the similar angle βdynamic when the mill is

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For a mill to work in the optimum condition the speed of rotation must get as close as possible to 75% of the critical speed and normal speeds are considered to be between 67 and 78% of the critical speed %n = Operating speed / nc 100

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The optimum ball milling speed of the ore was found to be % of the critical mill speed This work The Bond s Work Index is generally used as a measure of the resistance of a material to Wills and NapierMunn T Wills Mineral Processing TechnologyAn Introduction to the Practical Aspects of Ore Treatment

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Calculate and Select Ball Mill Ball Size for Optimum In Grinding selecting calculate the correct or optimum ball size that allows for the best and optimum/ideal or target grind size to be achieved by your ball mill is an important thing for a Mineral Processing Engineer AKA Metallurgist to do

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