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The critical speed of ball mill is given by, where R = radius of ball mill; r = radius of ball. For R = 1000 mm and r = 50 mm, n c = rpm.
This formula calculates the critical speed of any ball mill. Most ball mills operate most efficiently between 65% and 75% of their critical speed.
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The Effect of Ball Size Diameter on Milling Performance ... mill load, critical speed as well as the size reduction of the mill charge. It was thus required that
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