The critical speed of a trommel (N) is related to its dia (D) as

Cartridge filters are termed as 'edge' filters, because of the fact that the

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)

The specific surface of sherical particles is proportional to (where, Dp = diameter of particle).

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