The common methods of coal beneficiation are jigging, heavy media and floatation beneficiation. Both jigging and heavy media separation are gravity methods of coal separation.

In a vertically pulsating medium, the process of selecting coal according to the difference in particle density is called jigging. Jigging jigging medium used for water and air, individual also used in the suspension, with water as the sorting medium called hydraulic jigging machine, with air as the sorting medium called wind jigging.

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