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testing method for ball mills outokumpu technology oyj

Apr 03 2007 A testing method for designing a semiautogenous or an autogenous grinding circuit having at least one ball mill for grinding ore the method comprising measuring an amount of time for grinding a predetermined mass of ore to a first predetermined size in a first semiautogenous step calculating a required grinding energy based on the measured time for grinding in the first step mass of ore mill

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