Mechanical Operations
For grinding of cereals, grains, spices, pigments, saw dust, cork etc., the most extensively used size reduction equipment is a

Hammer mill
Buhrstone mill
Crushing rolls
Ball mill

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Mechanical Operations
In case of grinding in a ball mill

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

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