The energy required per unit mass to grind limestone particles of very large size to 100 μm is 12.7 kWh/ton. An estimate (using Bond’s law) of the energy to grind the particles from a very large size to 50 μm is________________?
(A) 6.35 kWh/ton
(B) 9.0 kWh/ton
(C) 18 kWh/ton
(D) 25.4 kWh/ton
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