Mechanical Operations
In case of grinding in a ball mill

Wet grinding achieves a finer product size than dry grinding
All of these
Grinding cost and power requirement increases with increasing fineness of the products
Its capacity decreases with increasing fineness of the products

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Mechanical Operations
Crushing efficiency is the ratio of the

Energy absorbed by the solid to that fed to the machine
Energy absorbed by the solid to the surface energy created by crushing
Surface energy created by crushing to the energy absorbed by the solid
Energy fed to the machine to the surface energy created by crushing

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