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Using a small ball mill to investigate gold liberation A small ball mill can be build to test the liberation. Artisanal miners in Mozambique (Fig. ) make small manual ball mills using a gas cylinder. This can grind 10 to 20 kg of ...
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This formula calculates the critical speed of any ball mill. Most ball mills operate most efficiently between 65% and 75% of their critical speed. Photo of a 10 Ft diameter by 32 Ft long ball mill in a Cement Plant.
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