The L/D ratios of ball mills range from slightly less than 1:1 to something greater than 2:1. The tube and compartment ball mills commonly used in the cement industry have L/D ratios 2.75:1 or more. The fraction of critical speed that the mill turns depends on the application and most mills operate at around 75% of critical speed.
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Introduce of gold ball mill for salegold grinding millpowder making machine ball mill Ball millis suitable for ore dressing chemical coal cement and refractory sectors to operate fine grinding. Bearing-type drive ball mill is a technological changing type compared with the traditional ball mill: 15% lower operating current and reduce the .