Mechanical Operations
The capacity of a classifier in 'tons of solid/hr' is given by (where, A = cross-sectional area, m² V = rising velocity of fluid, m/sec.S = percentage of solids in the suspension by volume.ρ = density of solids, kg/m³)

3.6 AVS/ρ
3.6 A.S. ρ
3.6 AVS.ρ
3.6 A.V.ρ

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Mechanical Operations
Bond crushing law

Calls for relatively less energy for the smaller product particles, than does the Rittinger law
Is less realistic in estimating the power requirements of commercial crushers
States that the work required to form particle of any size from very large feed is proportional to the square root of the volume to surface ratio of the product
States that the work required for the crushing is proportional to the new surface created

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Mechanical Operations
Arrange the following size reduction equipment in the decreasing order of the average particle size produced by each of them.

Fluid energy mill, Jaw crusher, Ball mill
Ball mill, Jaw crusher, Fluid energy mill
Jaw crusher, Ball mill, Fluid energy mill
Fluid energy mill, Ball mill, Jaw crusher

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