(1) Specification Gravity,
with which the grain falls through a fluid medium. For fine particles wet medium is generally applied When a solid particle fall freely in vacuum micron resistance present which can’t be ignore falling in water or air. This envois resistance in releases with increase of the velocity of the particle. When equilibrium is allotted between the grain rational and fluid resistance forces, the body reaches its terminal velocity and body reaches at equilibrium rate.
Spigot product (Particles with terminal velocity > V)
y = wt. of fine particle
z = wt. of the feedAnd Efficiency is always given by
t = wt. of the underflow particle
f = wt. of the feed.