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One of these "Circuit Classification System Efficiency" (CSE) is the fraction of "coarse" material inside the ball mill upon which grinding energy is deliberately expended versus the remaining

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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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The effective removal of chips and scats from a ball mill leads to lower power consumption from the mill drive. Eriez trunnion magnet can provide the solution—a powerful and efficient magnetic separator that can effectively remove as much as 80 or more of the worn/broken media.

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There are many factors influencing the grinding efficiency of ball making machine. As for one ball mill grinder when processing one mineral the influencing factors of grinding efficiency include property of grinding media matching of grinding media filling ratio of grinding media ratio of grinding balls to materials grinding density and feeding granularity.

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The ball mill is the most common ore grinding technology today and probably more than 50 of the total world energy consumption for ore grinding is consumed in ball mills.

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Working Principle Operation. The apparent difference in capacities between grinding mills (listed as being the same size) is due to the fact that there is no uniform method of designating the size of a mill for example a 5′ x 5′ Ball Mill has a working diameter of 5′ inside the liners and has 20 per cent more capacity than all other ball mills

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SAG mill product feeds two parallel ball mills of 6.6 m 11.1 m (internal diameter length) each with a 9.7 MW twin pinion drive. The ball mills are operated at a ball

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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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If the ball mills are in connection with hydrocyclones then the ball mills can t be evaluated by themselves but they need to be assessed as part of the grinding classification system. In any case the evaluation is simple You need to take a sample of the feed to the grinding-classification system and a sample of the discharge of the system.

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Table 3 is a summary of the preliminary tests (in duplicate) using various proportions of balls and pebbles. The on-line torque measurement was used for early measurement of the power drawn by the mill so that the grinding time could be calculated to maintain the same amount of energy for all tests (i.e. assuming a constant grinding efficiency).

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However rod mills like crushers must be operated under controlled conditions to obtain maximum efficiency and are more difficult to operate than ball mills. Thus the ultimate choice between a rod mill or ball mill for the primary grind may depend on the operator s or designer s experience as much as the metallurgist s research.

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