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For coarse fractions of dewatering of coal, which of the following process is used?

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in Engineering Chemistry II by (789k points)
For coarse fractions of dewatering of coal, which of the following process is used?

(a) Filtration

(b) Thickening

(c) Flocculation

(d) Centrifugation

The question was asked in examination.

This question is from Coal Technology in section Fuels and Combustion of Engineering Chemistry II

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Best answer
Right choice is (d) Centrifugation

Explanation: Centrifugation is a separation process that uses centrifugal force to settle the particles of a solid-liquid mixture. Since at the coarse fraction there is some coal reduction during dewatering due to which centrifugation process is used. Filtration, thickening and flocculation processes are used for finer fractions.

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