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base are up to 40ft in diameter and ball mills are up to 26ft in diameter. The measured gross power draws from these mills are plotted against the model predictions in Figure 1.

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Apr 14, 2012 · In one textbook, it says that the critical speed is the minimum speed at which an object can complete the circular motion. It gives the formula v = square root of (g*r) However, in another textbook it says that the formula is v = square root of (2*g*r) How can there be two different types of

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How To Calculate Critical Speed Of Ball Mill. The Critical Speed for a grinding mill is defined as the rotational speed where, This is the rotational speed where balls will not fall away from the mills shell.

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Dec 29, 2012 · Apr 01, 2008 · Ball mills are normally operated at around 75% of critical speed, m is the total mass of media in the mill, in tonnes, and n is the mill speed, rpm. » More detailed Ball Mills Mine Engineer.Com provides mining, gold, copper, coal

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Calculations 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 = 30.7 rpm. But the mill is operated at a speed of 15 rpm.

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ball mill speed calculation formula suttonseedsindia. Ball Mill Critical Speed Mineral Processing amp; Metallurgy. A Ball Mill Critical Speed (actually ball, rod, AG or SAG) is the speed at which the centrifugal forces equal gravitational forces at the mill shells inside surface and no balls will fall from its position onto the shell.

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How to calculate cement ball mill capacity Quora According to the operating experience, the output of each medium-ton ball mill and raw material mill per ton of grinding body is 340-450 kg per hour, some In the case of 550 kg per hour, the cement ball mill can produce 300-400 kg per ton of grinding body per ton, and sometimes even 450 kg per hour.

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