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the failure of the collahuasi motor was catastrophic and it occurred within months of commissioning. the collahuasi motor was for a 40 ft sag mill. the antamina 38 ft sag mill was also driven by an abb motor and the hanger plates had not failed on that machine after several years of operation.
sag mill success—start with the basics . minera doña ines de collahuasi had to make temporary repairs on the drive on the largest and newest of its three sag mills at the collahuasi copper mine in northern chile and then in mid-january 2007 finally began full replacement of the motor stator on the 21-mw gearless drive for the 40-ft
collahuasi sag mill failure . sag mill fault_collahuasi sag mill failure sag mill faultchichacharleroibe economic life of sag mill it was identified there was an insulation anomaly in the rotor which exposed the business to the risk of [chat online] ball mill pinion shaft failure analysis. afficher plus →
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abb also provided collahuasi with drives and ring motors for one sag mill and two ball mills. powerful abb gearless drives rated at 15.5 mega-watts each drive two eight-meter (26 feet) diameter ball mills that grind small pieces of ore at eleven revolutions per minute. however the plant’s showpiece is the world’s largest gearless mill drive.