2009 Gearless Mill Drives - CB&MUA

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

sag mill wrap around motor

Choosing a SAG Mill to Achieve Design Performance - Starkey ... the correct power required to grind ore in a SAG mill, by developing ore hardness variability functions for the ... provide the required grinding chamber and motor to draw the required grinding power. This .....

Gearless Mill Drives - ABB Ltd

Antamina Compania Minera Antamina S.A. Peru Project: One SAG Mill and 3 Ball Mill Drive Systems Capacity: SAG Mill 1000 t/h Ball Mills 1000 t/h Consultant: Bechtel, USA Mill Builder: FFE Minerals, USA Mill Size: SAG Mill 38 feet/11,58 m Ball Mills 24 feet/7,32 m Ore processed: Copper/Zinc Drive Rating: SAG Mill 20,1 MW, 9,23 rpm Ball Mills 11,2 MW, 11,38 rpm

Case Study - Grinding Mill Bearing Failure - SlideShare

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.

Gearless mill drives - Grinding | ABB

ABB's GMD is the most powerful mill drive system in the market to power semiautogenous (SAG), ball and autogenous (AG) mills, This 'workhorse' for grinding operations combines a robust, service-friendly and fit for purpose design to provide highest throughput, reliability .

Heavy-Duty Altra Caliper Brakes ... - Mining Technology

Oct 16, 2016 · The floating option allows for movement of the disc during mill start up. In addition to protecting the drive, the brakes are also used to prevent the mill from rocking during a power failure due to the unbalanced load. If the mill is allowed to rock, having lost drive from the motor, there is a high risk of bearing damage.

GEARS & DRIVES IRevival of the GMD in cement

installation of a 40ft, 28MW SAG mill GMD and two 28ft, 22MW ball mill GMDs at Toromocho (Minera Chinalco Peru) at the unprecedented height of 4600m above sea level. by Matthias Neurohr, ABB Switzerland Ltd IRevival of the GMD in cement Mr P Subba Raju, MD Lalitha Cement, and Abdellah Nahdi, senior sales manager ABB

reasons for ball mill bearings failure-[crusher and mill]

Home>Crusher and Mill >reasons for ball mill bearings failure. reasons for ball mill bearings failure. Roling Bearings: Failures, Causes and Countermeasures. Koyo® Ball & Roller Bearings: Failures, Causes and Countermeasures JT£ KT CA T.NO.B300 1 E JTEKT CORPORATION . ... Sag Mill gear failure - OneMine Mining and Minerals ...

Used Sag-mills For Sale

Buy used Sag-mills from A.M. King Industries. We can help guide you to the best solution for your equipment needs.

LOCKED CHARGE STARTS AND YOUR GRINDING MILL Jeff .

absorption so a failure of mill bearings, (normally the weakest link), is typical. Other costly types of damage that occur from falling charge, although less frequent, are cracks in the mill heads and shells. LOCKED CHARGE STARTS AND YOUR GRINDING MILL Authors: Jeff Belke & Mitch Bertrand Damaged radial bearing

Outotec Grinding technologies

Outotec® Grinding technologies With over 100 years experience in grinding technology, Outotec is one of the largest mill suppliers in the world. Outotec's dedicated team of grinding specialists provide design engineering, testing and analysis in order to select the mill best suited to .

CMP Paper 16.10.09 Final - ABB Group

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 .

Ring gear drives huge grinding mill | Machine Design

By this summer, a grinding mill that is bigger around than a Boeing 747 will turn chunks of copper ore into gravel-sized bits for smelting and refining. The largest ring gear will make it happen

reasons for ball mill bearings failure-[crusher and mill]

Home>Crusher and Mill >reasons for ball mill bearings failure. reasons for ball mill bearings failure. Roling Bearings: Failures, Causes and Countermeasures. Koyo® Ball & Roller Bearings: Failures, Causes and Countermeasures JT£ KT CA T.NO.B300 1 E JTEKT CORPORATION . ... Sag Mill gear failure - OneMine Mining and Minerals ...

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 ...

INSURABILITY OF LARGE GEARLESS MILL DRIVES - .

1 INSURABILITY OF LARGE GEARLESS MILL DRIVES L. Bos1, *M. van de Vijfeijken2 and J. Koponen2 1Zurich Services Corporation Schaumburg, USA, IL 60196 2ABB Switzerland Ltd Segelhofstrasse 9 P Baden-Daettwil, Switzerland, CH-5401 (*Corresponding author: [email protected])

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sag mill ring gear failure adirondack. twin drive sag mill kconsulting. mill sag mechanical failure acakj Crusher Machine For Sale Siemens to modernise the drive in a SAG mill in mill drives and twinpinion SAG mill ball mill ring gear dual pinion. Contact the manufacturer > gear drive sag mill vs gearless drive sag mill . Get price

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 .

Ball mill saved from failure - YouTube

Jun 17, 2012 · This ball mill had 33 of 68 bolts broken and was saved by Boltprep rebolting to the correct bolt loads using Ultrasonics. ... Ball mill saved from failure Craig Oldnall. ... SAG and Ball Mills ...

SAG Mill motor transformer failure at Copper Mountain Mine ...

May 16, 2013 · SAG Mill motor transformer failure at Copper Mountain Mine ... announces that one of the two ABB transformers powering the SAG Mill motors at the Copper Mountain mine has experienced a failure .

2009 Gearless Mill Drives - CB&MUA

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

Gearless Mill Drives - ABB Ltd

Antamina Compania Minera Antamina S.A. Peru Project: One SAG Mill and 3 Ball Mill Drive Systems Capacity: SAG Mill 1000 t/h Ball Mills 1000 t/h Consultant: Bechtel, USA Mill Builder: FFE Minerals, USA Mill Size: SAG Mill 38 feet/11,58 m Ball Mills 24 feet/7,32 m Ore processed: Copper/Zinc Drive Rating: SAG Mill 20,1 MW, 9,23 rpm Ball Mills 11,2 MW, 11,38 rpm

SAG Mill Grinding Circuit Design

• Semi Autogenous Design Factors[PDF]GET PRICE >>

Semi-autogenous grinding (SAG) mill liner design and ...

Semi-autogenous grinding (SAG) mill liner design and development D. Royston Principal, Royston Process Technology Pty Ltd., Brisbane, Queensland, Australia Abstract SAG mill liner development draws primarily on practical experience from SAG milling operations supported by

The Selection and Design of Mill Liners

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 the charge directly on the liner, and unsuitable

• Authors: M S Powell · I Smit · P Radsizewski · Paul W Cleary · B Rattray · K ErikssonAffiliation: University of Cape Town[PDF]GET PRICE >>

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Ring gear drives huge grinding mill | Machine Design

By this summer, a grinding mill that is bigger around than a Boeing 747 will turn chunks of copper ore into gravel-sized bits for smelting and refining. The largest ring gear will make it happen

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 .

INNOVATION NEWS Mills and GMDs -

Early SAG mills had a diameter of about 32', later increasing to 34, 36, 38 and 40'. At the same time the mill volume also increased. Typically a SAG mill has a much larger diameter compared to its length. Yet the SAG mill of Newmont's Yanacocha mine in Peru is a single stage mill (no ball mill after the SAG mill.

sag mills and ball mills pdf - YouTube

Jul 11, 2019 · This video is unavailable. Watch Queue Queue. Watch Queue Queue