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collahuasi sag mill failure

Insurability of Large Gearless Mill Drives (GMDs)

Sep 28, 2014· Insurability of Large Gearless Mill Drives (GMDs) admin 28 September 2014 ... Let us hope not because the original Collahuasi and Antamina SAG mill stators most likely would still be operating had they been wound with the type of VPI parallel windings used by Siemens. ... we showed that the Collahuasi failure occurred because the hanger plates ...

Chile Collahuasi copper mine set for strong 2008 - Reuters

Feb 25, 2008· Collahuasi output slowed in early 2007 after a major SAG mill, or grinding mill, was shut for 46 days for repairs. The time taken to repair the mill…

Siemens modernises drive system for ore mills - Mining ...

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.

Collahuasi SAG Mill échec - tagcongres.nl

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 →

Electrical equipment for Collahuasi | ABB

The company operates the copper mine in Chile, which is the fourth largest in the world. The first order to monitor and control the mine's total production on-line Based on an Advant control system. In 2001, ABB received an order comprising drives and ring motors for one SAG mill …

Combined DEM and SPH simulation of overflow ball mill ...

Combined DEM and SPH simulation of overflow ball mill discharge and trommel flow. Author links open overlay panel M.D. Sinnott a P.W ... supplying excess oversize product out of a SAG mill to downstream grinding and separation stages can reduce their efficiency. ... catastrophic failure requiring replacement of a trommel is an extremely serious ...

The Selection and Design of Mill Liners - MillTraj

Mill linings, Weir Rubber Engineering, Salt Lake City, UT 84126, United States of America . ABSTRACT . Dramatic shortcomings of mill liner designs, especially of large SAG mills, - such as rapid failure and even mill shell damage arising from impacting of …

SAG MILL DISCHARGE SCREENS-TROMMEL vs. VIBRATING …

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

Benchmarking: Ball Mill Power Draw Models - SAGMILLING.COM

Benchmarking: Ball Mill Power Draw - Collahuasi. Villouta, R.M., Collahuasi: After years of operation, Proceedings of the International Autogenous and Semiautogenous Grinding Technology conference (SAG 2001), Vancouver, Canada, Pages I-31 – I-42

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 …

SAG Mill Liners Breakage - Grinding & Classification ...

In any case, pebble crushing works, though metal in the SAG mill pebbles is a significant problem for crushing. Especially if your ore is also magnetic as ours is. In 1992 National Steel Pellet Company published a paper at SME that compared a normally fed SAG mill circuit with a fully autogenous circuit equipped with pebble crushing.

Industrial Solutions Project Brief

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.

A novel approach to the geometallurgical modelling of the ...

Having related SAG mill throughput to SAG mill power and the ball mill circuit P 80, the data was then reduced to a series of curves representing the relationship between the SAG mill specific power consumption (S.P.C.), which is the SAG mill power draw divided by throughput, and the ball mill P 80 for each UGM. Fig. 3 shows the six resulting ...

The Siemens 42ft gearless mill drive, still an ...

next size Gearless Mill Drive, i.e. a 42ft mill. It is a dual design approach considering, on the one hand, the experi-ences Siemens made with Gearless Mill Drive (GMD) instal-lations over the past 40 years and, on the other hand, using computerized design tools calculating the system behavior where experience does not yet exist.

AUTOMATION ADVANCED CONTROL EXPERT (ACE)

DOÑA INÉS DE COLLAHUASI 7 SAG MILL ACE 8 SUCCESS STORY: ANTOFAGASTA PLC MINERA LOS PELAMBRES 9 THICKENER ACE 10 FLOTATION ACE 11. 3 Operational manager Optimization with ACE ... 1 BrainWave was installed to control the SAG mill weight, solids percentage and ore feed tonnage, and to limit SAG mill sound emissions.

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 …

Collahuasi Copper Mine - Mining Technology | Mining News ...

Collahuasi copper mine is situated in northern Chile, about 180km southeast of the port of Iquique, at an altitude of 4,000m. The mine is 44%-owned by Xstrata plc (following its acquisition of Falconbridge Ltd in 2006) in a joint venture with Anglo American (44%) and a Japanese consortium (12%) comprising Japan Collahuasi Resources BV, Mitsui & Co. Ltd., Nippon Mining & Metals Co. Ltd. and ...

SM at Kennecott Utah Copper Introduction

• SAG mill grate or trommel panel failure • Hydrocyclone failure • Degradation or failure of SAG mill pebble removal system . It is difficult to quantify the economic impact of large rock events due the widespread impacts and flow on effects across areas. However, qualitatively the losses are associated with:

ABB Motor - Gearless Mill Drive GMD System - YouTube

Nov 08, 2016· ABB Motor Gearless Mill Drive GMD System. Top 7 Mistakes Newbies Make Going Solar - Avoid These For Effective Power Harvesting From The Sun - …

molino sag mill n p1820g10 - cbc-enterpriseservices.eu

The Robotic SAG Mill Bolt Removal and Torqueing System consists of platformmounted robot outside and near the mill that is designed to remove liner bolt nuts Molinos AG/SAG molinos AG/SAG,, chile, chile, minería, molino. es el mayor proveedor, a nivel mundial, de molinos AG/SAG que operan globalmente.

Collahuasi improves the availability of it's VPA filter by ...

Aug 14, 2017· The project was carried out at Collahuasi's mine in northern Chile, about 180 km southeast of the port of Iquique, at an altitude of 4,400 meters. This mining district has been in …

SAG Mill Grinding Circuit Design

• Antamina´sSAG mill has the worst condition of slurry evacuation in trommel: α = 222 m 3/h/m 2 • Esperanza and Escondida´sSAG mills have high values of α, but they have a screen • Trommel of 40 feet SAG mill of Collahuasi has an high value of α = 172 m 3/h/m 2. Open Pulp Free Flow by Free SAG 1011 Area, % Flow, m 3/h Area, m 2 Area ...

(PDF) Developments in AG / SAG mill modelling

Developments in AG / SAG mill modelling. ... Ore hardness values are provided by Collahuasi's block model which has been populated with ore characterisation data derived from Bond ball work ...

liners increased uptime of discharge chutes at ...

Jul 08, 2015· liners increased uptime of discharge chutes at Collahuasi. 's redesign project of the discharge chutes at Compañía Minera Doña Inés de Collahuasi resulted in an increase in the service life.

Engineering and Project Management History

Collahuasi Mine Component Failure Analysis Ball mill repair support ... Ball Mill Gear Failure Analysis Analysis of SAG mill motor drive failures Regrind Mill Refurbishment Project management, inspection and technical services for refurbishment of used ball mill Oceanagold (Philippines), Inc. ...

Design and Implementation of Advanced Automatic …

"Design and Implementation of Advanced Automatic Control Strategy Based on Dynamic Models for High Capacity SAG Mill" Iván Yutronic (Collahuasi)

Case Study - Grinding Mill Bearing Failure

Jul 31, 2013· The mill normally operates at 3,150 rpm. 1.Outboard Motor Bearing Legend 2.Inboard Motor Bearing 3.Inboard Mill Bearing* 4.Outboard Mill Bearing * Bearing that was failing. The mill rotor bearings, which are mounted in a steel housing, are two (2) cylindrical roller bearings, NU 316 ECM/C3, and one (1) grooved ball bearing, SKF 6316 C3.

SINGLE STAGE SAG/AG MILLING DESIGN

SINGLE STAGE SAG/AG MILLING DESIGN ABSTRACT Single stage semi-autogenous / autogenous (S/AG) milling has become a common design for a variety of ore types with the advantages of being comparatively low capital cost and flexible for future expansion. The single stage

2009 Gearless Mill Drives - CB&MUA

Gearless Mill Drives Machinery Risk Solutions Practice 2009 Matt Dugalic P.Eng., MARSH – MRSP Risk Consultant, VP Kurt Tischler Dipl.-Ing., Siemens – …

Selection of Comminution Circuits for Improved Efficiency

Typically, a SAG mill based circuit (P80 of 106 to 150 um) has media costs of around A$1/t. Providing the ore is amenable, the use of primary autogenous milling can reduce this cost by 40%. Autogenous milling is typically practiced in association with .