What is centrifuge?

What is centrifuge?

Separation by filtration and Separation by sedimentation

There are 2 methods of centrifugation: “centrifugal filtration” and “centrifugal sedimentation”.

Centrifugal filtration

Centrifugal filtration is the separation of the solid and the liquid by centrifugal force through the filter media (for example, cloth or metal).
※Filter cloth (polypropylene, polyethylene and etc.), wire mesh and screen (made of stainless steel, metal equivalent to hastelloy) are used as filter media.

Centrifugal sedimentation

Centrifugal sedimentation is the centrifugal separation of the solid and the liquid by using the difference in specific gravity without filter media. (See drawing 1: right.)
※In case of separation by sedimentation, it is possible to classify the solid by using the sedimentation speed of the particle.

Advantage of centrifugal filtration:

It is possible to reduce the moisture content of solid to the minimum through the filter media.

Advantage of centrifugal sedimentation:

It is possible to separate the solid that cannot be caught with filter media and the fine particle difficult to filtrate by centrifugal force without filter media (consumable parts).

Generally, the result of centrifugal separation depends on the following elements.

Solid:①Size of particle ②Shape ③Specific gravity ④Compressibility
Liquid:①Specific gravity ②Viscosity ③Temperature

Next page: Batch type and Continuous type

Previous page: entrifugal force

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