Discussion
A high-efficiency separator improves a grinding circuit chiefly by
Answer: A
Correct answer: making a sharper cut between fine and coarse material
A poor separator returns fine material to the mill for regrinding and lets coarse material through into the product. A sharp cut does neither, so the mill grinds only what still needs grinding and the product is more uniform. Both effects reduce the energy per tonne, which is where the efficiency gain comes from.
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