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ball mill cyclone copper concentrator wiki papua new guinea

In 1991 two autogenous grinding mills were installed replacing two stages of crushing one stage of rod milling and one stage of primary ball milling The cyclone overflow P80 of the secondary ball milling circuit was reduced to 120 microns due to the increased operating power in the AGSAG mill circuits
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    Changes in metal prices and mine output over recent years have required the Copper Concentrator of Mount Isa Mines to operate at annual tonnage rates varying from 40 million to 65 million tonnes Several circuit combinations were operated during this period utilising up to two semiautogenous grinding SAG mills and up to two ball mills

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    cells 4 to 9 is fed to the column cell and concentrate from cells 10 to 15 scavengers is fed to the low grade concentrate regrind circuit The regrind mills use 25mm grinding balls and have a nominal cyclone overflow P80 of 40 microns The nominal rougher feed grades are 08 copper

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