a mill grind out (no ore feed) of 10 to 20 minutes is also ... By calculating the ratio 'H/Di' and ... Synopsis. Ball mills are usually the largest consumers of energy within a .... media in the mill by looking at the mill grinding efficiency. At that time, it...

Consultprimary wet autogenous mill (WAM) and a series of ball mills. WAM is customary chosen .... the procedure of ore estimation that is still the primary tool of design and .... plicable to calculating the efficiency factors EF4GDRM and. EF4CDBM.

ConsultOct 10, 1992 ... The efficiency of a grinding mill or a grinding circuit is an elusive concept, and ... gold ores of the Witwatersrand, make use of the index kilowatt hours per ... Bond standard grindability test The calculation makes use of the information .... (2)primary grinding in closed circuit ball mills with secondary grinding...

ConsultApr 8, 2018 ... The basic parameters used in ball mill design (power calculations), rod ... also have a considerable variation across one ore body or deposit.

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