Mechanical Operations
Shell and leaf filter as compared to plate and frame filter

Entails less labor cost
Facilitates filtration under higher pressure
All of these
Provides more effective washing

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Mechanical Operations
Rod mills employed for grinding

Employ steel rods of 2-12 cms diameter extending over full length of the mill
Is useful for handling sticky materials
Employ a steel shell having L/D ratio of 1.5 to 3.0
All of these

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