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Grinding is a pretreatment operation for increasing the surface area and also liberate value minerals from gangue.

Grinding is performed in tumbling mills and can be done either as dry or wet grinding. The ore is charged into the tumbling mill and is ground to a size of 10-300 ┬Ám. The grinding medium can be steel rods or balls, hard rock or the ore itself.

Symbol for grinding
Symbol for grinding

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