Mechanical Operations
In case of a hammer crusher, the final product size depends on the

Clearance between hammer & grinding plates
All of these
Rotor speed
Feed rate

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Mechanical Operations
Rod mills employed for grinding

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

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