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))

In ball mill operation, the feed size (Df in meters) and the ball diam

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.	Db2 = K.Df
B.	Db = K.Df
C.	Db3 = K.Df
D.	Db2 = K.Df2
Answer» B. Db = K.Df

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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))

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