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Drum and sectional coolers are used to cool free-flowing bulk materials.
Drum coolers are primarily designed with air as the cooling medium; sectional coolers are always run with liquid coolants. In both cases the cooling can be done with direct or counter-current processes.
Rotary drums have an extremely large cooling surface which guarantees rapid cooling of the bulk material in continuous operation.
A specific advantage of rotary drum coolers is the gentle treatment of the bulk material.