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    A ball mill also known as pebble mill or tumbling mill is a milling machine that consists of a hallow cylinder containing balls; mounted on a metallic frame such that it can be rotated along its longitudinal axis. The balls which could be of different diameter occupy 30 – 50 % of the mill volume and its size depends on the feed and mill size.

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    derivation to calculate critical speed of ball mill. If a large amount of slip occurs between the outer layer of the load and the liner (or if the mill speed is low, e.g. less than 60 per cent of critical speed8), the load assumes the orientation in the mill shown in Figure 1, and the torquearm model for mill power .

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    derivation to calculate critical speed of ball mill. If a large amount of slip occurs between the outer layer of the load and the liner (or if the mill speed is low, e.g. less than 60 per cent of critical speed8), the load assumes the orientation in the mill shown in Figure 1, and the torquearm model for mill power .

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    Ball mill used in the process of fining material. 2012-7-23ball mills usually operate at 65 to 75 of the critical speed ball mill has been used to produce fine particles from a coarse feed for some period of time traditional powder metallurgy uses many types of ball mills to produce fine material powde...

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