collahuasi sag mill failure

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SAG Mill Grinding Circuit Design

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INSURABILITY OF LARGE GEARLESS MILL DRIVES

large mills, as the financial impact of a failure is proportional to the through-put of the mill. Despite the occurrences of these events, as mining operations are driven by lower ore grades and the ability to continue reducing operating costs per ton, the trend for having larger …


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Ball Mill . Ball Mill: MTCT-02 The ball mill works on the impact between the rapidly moving ball and the powder material bath enclosed in a hollow cylinder thus in the ball mill impact or attrition or bath are responsible for the size reduction.


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Design of the 40 foot SAG Mill Installed at the Cadia Gold ...

The design of the 40-foot diameter SAG mill installed at the Cadia Gold Mine, New South Wales Australia, followed after two years of extensive ... SAG mill base power was estimated from pilot ...


Engineering&Project History - A Boughey Pty Ltd

32' x 14' SAG Mill Engineering Support Technical support for manufacture of mill heads and trunnions. Alcoa World Alumina Australia. Mill Replacement Study Inspection and study of options for repair or replacement of mill. ... Collahuasi Mine Component Failure Analysis Ball mill repair support


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SAG Mill Success—Start with the Basics

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 ...


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Collahuasi magnifies machine learning value - Mining Journal

To illustrate, for one SAG mill, the model's output revealed that the optimal ball charge was 18%, which differed from the 19.5% at which the SAG typically operated (figure 1, below). Changing ...


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Literature Review: Gearless Motor Failures – A Mill ...

Sep 10, 2014· 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 …


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When mill diameter and mill power became again increased, only the Gearless Mill Drive (GMD) could be envisaged to cover this requirement above 10 MW. The GMD is by its nature a variable speed drive system. Process operators, once having the facility of adjustable speed, could not live anymore without it for SAG …


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