the balls which could be of different diameter occupy 30 -50% of the mill volume and its size depends on the feed and mill size. the large balls tend to break down the coarse feed materials and the smaller balls help to form fine product by reducing void spaces between the balls. pharmaceutical uses of ball mill. the small and average
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world cup 2014: adidas' brazuca ball is most high-tech yet. the 2006 ball had 14. before that the balls were made of 32 internally-stitched panels. there are also small dimples on the
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however not many high cr balls are used in primary grinding because the improvement obtained in wear resistance relative to steel typically 25 – 30% is not enough to offset its higher cost. in primary ball milling wear speed is largely independent of ball diameter and mill volume.