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1200 tons per hour calculate critical speed ball mill impact crusher experience

1200 tons per hour calculate critical speed ball mill impact crusher experience

The point where the milles a centrifuge is called the Critical Speed, and ball mills usually operate at 65 to 75 of the critical speed. Ball Mills are generally used to grind material 1/4 inch and finer, down to the particle size of 20 to 75 microns.

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