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Ball Mill Critical Speed Mineral Processing / Metallurgy. Jun 19, 2015 . A Ball Mill Critical Speed (actually ball, rod, AG or SAG) is the speed at . The critical speed of a rotating mill

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Investigations were carried out in a laboratory ball mill having the size of DxL = 160x200 mm with a ribbed inside surface of the drum. The mill ball loading was 40% by volume, the rotation rate was equal to 85% of the critical speed. Balls were made from steel S4146, extra high quality, having hardness 62 ± 2 HRC according to Rockwell.

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A ball mill is one kind of grinding machine, and it is a balls, and the rotational speed N of the mill was varied in a range from 40% using the critical rotational speed Nc defined by (Eq. 11) as a reference. The criti-cal rotational speed Nc is the limiting speed where the

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Model Predictive Control for SAG Milling in Minerals Processing 5 Model Predictive Control on a SAG Mill and Ball Mills The solution for the SAG Mill is an adaptive controller which controls mill load using direct mill weight measurement or indirectly from bearing oil pressure.

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