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How Do I Calculate The Critical Speed Of A Mill

The internal diameter of the ball mill was 5.03 m and the length-to-diameter ratio was 0.77.The steel balls occupied 18 of the mill.The total load occupied 45 of the mill volume.If the mill operated at 72 of the critical speed, determine 1.The mill power at the shaft during wet grinding, 2.The mill power at the shaft during dry grinding.

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