calculation for speed of ball mill of 21 rpm
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A cement mill (or finish mill in ... Ball mills are normally operated at around 75% of critical speed, so a mill with diameter 5 metres will turn at around 14 rpm ...
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A Ball Mill Critical Speed (actually ball, rod, AG or SAG) ... N c is the critical speed,in revolutions per minute, D is the mill effective inside diameter, in feet.
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THE INFLUENCE OF MILL SPEED AND PULP DENSITY ON THE GRINDING EFFICIENCY 89 ... (rpm) •Mill torque on the ... test from the empty mill weight, including the ball ...
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