critical rotational speed nc of ball mill

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,. nc ... rotational speed of ball mill ...

Ball mill - Wikipedia

A ball mill is a type of grinder used ... Critical speed can be ... The grinding balls in the grinding jars are subjected to superimposed rotational ...

Ball Mills - Mine Engineer

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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