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Question

Gravity separation process is used for the concentration of _____________.
calamine
haematite
bauxite
chalcopyrites

A

calamine

B

bauxite

C

haematite

D

chalcopyrites

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Solution

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Gravity separation process is used for the concentration of haematite. Gravity method is based on the difference between the densities of the ore particle and gangue. It is used for the concentration of denser ores from the water soluble and lighter impurities (gangue). Oxide ores and carbonate ores are concentrated by this method.

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