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Jun 01 2009 At product sizes finer than 80 passing 75 μm the efficiency of ball mill grinding rapidly decreases The practical limit to ball mill product fineness is considered to be 40–45 μm

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At the Kemess Mine the effect of a trunnion magnet system on the ball mill was significant The total mill feed remained essentially unchanged averaging approximately 1300 TPH However the total mill power consumption dropped 8 from an average of 7600 kW to 7000 kW.

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In this example the ball mill circuit classification system efficiency is 77.1 per cent at 75 μs This means that 77.1 per cent of the particles in the mill are coarse and that 77.1 per cent of the mill

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mill weight during the test from the empty mill weight including the ball charge at the start of the test The pulp coated and the grinding efficiency decreases The pilot mill is also equipped with a sensor measuring screen is obtained with the lowest speed.

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