collahuasi sag mill

Collahuasi - Mucho más que Cobre

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 →

(PDF) Developments in AG / SAG mill modelling

Jan 19, 2016· The mills at Sentinel in Zambia are amongst the world's biggest, with 2 off 40 ft SAG mills complete with 28 MW drives, and 2 off 28 foot-ball mills with 22 MW drives. For mines of this size ...

UPDATE 1-Chile Collahuasi to boost '08 copper output 20 ...

Collahuasi's social investment focuses on areas such as education, local development, the promotion of tourism, conservation of heritage and the environment and the health of people where it can make a sustained contribution over time. Collahuasi Educational Foundation.

collahuasi sag mill failure -

The modernisation project includes two 8MW semi-autogenous grinding (SAG) mills and two 1.7MW ball mills with dual pinion drives. The new drive systems are replacing the existing synchronous motors and direct converters for the SAG mills and the drive systems of the ball mills, which were installed by a different manufacturer.

Gearless mill drives - ABB Group

The SPI (SAG Power Index) is another related index used to determine the ore comminution behavior in AG/SAG mills. The index is obtained from a batch test in a mill of 305 mm × 102 mm operated with steel balls of 25 mm in diameter. The feed ore sample is crushed material <12.7 mm.


The optimizing level maximizes Power Draw using an online gradient estimation of the non-lineal function between Power Draw and mill Hold Up. The results show that is possible to operate the SAG Mill in the optimal zone, compensate unmeasurable disturbances and maximize throughput without violating operational constraints.

Comminution and Beneficiation | Mining | SGS

in the collahuasi mine. copper is used mainly in wire and cable, brass, tubing and pipes, air conditioning and refrigeration. Image SAG mill under construction in the new Confluencia grinding plant that forms part of the Los Bronces expansion project in Chile. Copper.

list of 40 foot sag mills worldwide

A novel approach to the geometallurgical modelling of the Collahuasi grinding circuit Article in Minerals Engineering 22(12): · May 2009 with 426 Reads How we measure 'reads'

Comminution Services - SGS

Marsh 1 WHY shift to the gearless drives in mineral processing ??? Mill size – grinding economies of scale Relative lifecycle cost Lower power consumption Robust design Avoiding critical open gear power trains Variable speed Compatibility with processing plants Engineering design efficiencies Availability Minimal downtime

Over 80 comminution and minerals processing publications ...

Sep 10, 2014· 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. Similarly, the Sossego motor for the 38 ft SAG mill had not failed. It too had an ABB motor and it had operated longer than the Collahuasi motor.

Electrical equipment for Collahuasi | ABB

Mill power ride through – Keeps the mill operating even under voltage dips. Over-duty cycle – Avoids unexpected downtime if the mill gets overloaded. Oscillation damping – Detects and actively damps mechanical oscillations in the drive train, reducing additional fatigue on the mill components.

collahuasi sag mill failure - Hatfield Children's Homes

SAG mill conference, provided details of the then largest gear drive in operation on a SAG mill (34ft x 18ft) at Escondida 13.4MW, which began operation in 1995. The reason for not having larger gear drives was due to the limitation of gear manufacturers not having access to larger single piece special alloy castings. To the benefit of


Design of the 40 foot diameter SAG mill installed at the Cadia gold copper mine. SAG 2001, Vancouver, pp 43-58, Dept of Mining and Mineral Process Engineering, Univ of British Columbia. 52.

SAG Mill Grinding Circuit Design

• The SAG Power Index (SPI®) Test is a measure of the hardness of the ore from a SAG or AG milling perspective. Conducted in a bench-scale SAG mill, the SPI® test measures the energy needed to perform a standard size reduction (expressed as an index). All four breakage mechanisms found in the industrial SAG mill are represented

Preprint 13-050 - ceecthefuture

Comminution Services - SGS. scale SAG mill, the SPI® test measures the ... Our reference list speaks ... including the largest circuit in the world, the Collahuasi Rosario 40 foot grinding plant.

Antamina Copper-Zinc Mine - Mining Technology | Mining ...

SAG mill breakdowns are costly events for producers. As an example, early in 2006, Cia. 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 ...


Nov 25, 2019· The world's 20 largest copper mines produce nearly 9 million metric tons of the precious metal a year, about 40% of the world's total copper mine capacity. Chile and Peru, alone, account for more than half of the copper mines on this list. The U.S. makes the cut, as well, with two mines among the top 20.

Ring-geared mill drives - Grinding | ABB

The modernisation project includes two 8MW semi-autogenous grinding (SAG) mills and two 1.7MW ball mills with dual pinion drives. The new drive systems are replacing the existing synchronous motors and direct converters for the SAG mills and the drive systems of the ball mills, which were installed by a different manufacturer.

Minerals | Free Full-Text | Testing of Ore Comminution ...

SAG MILL DISCHARGE SCREENS-TROMMEL vs. VIBRATING Tony Moon, RTZ What I'd like to talk about is probably one of the nastiest bits of mill design for a grinding circuit, and that is the choice of what do you use on a SAG mill discharge? Do you use vibrating screens or trommel screens? What many of you probably don't realize is that at

The World's 20 Largest Copper Mines - The Balance

Ring gear drives huge grinding mill wraparound sag mill failure . Read More... dual pinion sag mill vs single pinion sag mill - sag mill manufacturer – Grinding Mill China. sag mill manufacturer india Mining. sag and bowl mill manufacturers in india ... detail specification of vertical roller mill; wraparound sag mill …

Collahuasi magnifies machine learning value - Mining Journal

SAG Mill Comminution (SMC) Test; ... Collahuasi Rosario's 40-foot SAG mill. SGS's philosophy is to understand the variability in your ore and then design, optimize, or forecast from this knowledge. We bring proven technology from the geological and processing disciplines, relying on not just one methodology but several, to provide a ...