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Mechanical Operations

Mechanical Operations
Chance process is used for the

Water treatment
Cleaning of coal
Concentration of pyrites
Concentration of iron ore

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Mechanical Operations
In closed circuit grinding as compared to open circuit grinding, the

Production rate at a given limiting size is lower
Product has lesser size uniformity
Specific surface of product is more
Operation is economical

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Mechanical Operations
The most common filter aid is

Calcium silicate
Silica gel
Sodium carbonate
Diatomaceous earth

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Mechanical Operations
The filtrate flow rate in constant pressure filtration

Remains constant throughout
Continuously decreases
May increase or decrease ; depends on the pressure
Continuously increases

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Mechanical Operations
__________ is the most suitable for compounding rubber and plastic solids.

Pan mixer
Pug mill
Banbery mixer
Charge can mixer

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Mechanical Operations
Number of particles in a crushed solid sample is given by (where, m = mass of particles in a sample, Vp = volume of one particle, ρ= density of particles)

M . Vp/ρ
Vp/m . ρ
M/ρ . Vp
M . ρ/Vp

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