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chemical engineering mechanical operations
1. In ball mill operation, the feed size (Df in meters) and the ball diameter (Db in metres) are related as ( where, K = grindability constant (varying from 0.9 to 1.4 in increasing order of hard ness))
(A): Db = K.Df
(B): Db2 = K.Df
(C): Db2 = K.Df2
(D): Db3 = K.Df
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