2012-11-26most ball mills operate most efficiently between 65 and 75 of their critical speed photo of a 10 ft diameter by 32 ft long ball mill in a cement plant photo of a series of ball mills in a copper plant grinding the ore for.
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Hgt gyratory crusher ball mills the point where the mill becomes a centrifuge is called the critical speed and ball mills usually operate at 65 to 75 of the critical speed ball mills are generally used to grind material 14 inch and finer down to the.Read More
Ball mills - mineral processing metallurgy 20170317 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.Read More
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