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Mechanical Operations

Mechanical Operations
__________ are used for the separation of coarse particles from a slurry of fine particles.

Decanters
Thickeners
Hydrocyclones
Classifiers

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Mechanical Operations
Grinding characteristic of a material is given by its

Abrasion index
Shatter index
HGI
Angle of repose

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Mechanical Operations
Ball mills and tube mills with flint or porcelain balls are used for size reduction of

Asbestos
Limestone
Rubber
Non-metallic ores

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

N ∝ 1/√D
N ∝ 1/D
N ∝ D
N ∝ √D

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Mechanical Operations
Rittinger number which designates the new surface prduced per unit of mechanical energy absorbed by the material being crushed, depends on the

All of these
Ultimate strength of the material
Elastic constant of the material
State or manner of application of the crushing force

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Mechanical Operations
For a cyclone of diameter 0.2 m with a tangential velocity of 15 m/s at the wall, the separation factor is

2250
460
230
1125

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