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Ball Mill Critical Speed Mineral Processing & 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 shell's inside surface and no balls will fall from its position onto the shell

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The critical speed of a SAG mill is the speed in RPM's at which centrifugal force causes the material being ground to be held against the inside of the shell This speed is only dependent on the

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What is critical speed of a SAG mill The Q&A wiki The critical speed of a SAG mill is the speed in RPM's at which centrifugal force causes the material being ground to

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A further explanation is required to explain the importance of designing the SAG mill chamber to draw required power at optimum operating conditions of 75% critical speed and less than 30% by volume load Recent studies in the three foot diameter SAG mill are instructive The following graph shows the relevant facts as Figure 2

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Mountain the inching mode in the ABB drives are currently set to turn the SAG mill at about 10 % of rated speed and the ball mills at about 3% of rated speed (mill speed 040 rpm) Furthermore tests during the hot commissioning have shown that the drives can even operate in inching mode at as little as 1% rated speed (mill speed 010 rpm)

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Ball Mill Critical Speed Mineral Processing & 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 shell's inside surface and no balls will fall from its position onto the shell

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