sag mill gearless drive

  • Major FL mill order for ..

    Feb 09 2020  Each of the four lines will consist of a single 40 ft SAG mill with a 28 MW drive and two 28 ft ball mills each with a 22 MW drive. The SAG mills when installed will be the largest in all of Asia. All drives are Gearless Motor Drives from ABB. Each line will also include an FL cone crusher solution with state of the art digitalisation

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  • Sag And Ball Mill Drive Failures

    22 MW GMD for 28 ball mill 28 MW GMD for a 40 SAG mill 28 MW GMD for 42 SAG mill Whether it is size or an installation at the highest altitude 4600 m.a.s.l. ABBs GMDs are well positioned to contribute to the building of larger and ever more powerful mills. Leading the gearless mill drive evolution. Sag Milling In Australia Revised Submission

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  • Mining Engineering Online

    Oct 25 2019  Two 28 MW gearless mill drive systems GMDs are operating in the company s 12 m 40 ft SAG mills and four 16.5 MW GMDS are employed in 26 football mills along with associated control systems. Gearless mill drives are the workhorses for grinding operations which are at the heart of any mine. The six ABB GMDs at the world class Panama Cobre

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  • Gearless Mill Drives for Cobre Panama Jan 2018

    Of the six ABB gearless mill drives being installed at Cobre Panamá four will power ball mills and the other two will drive SAG mills. Importantly these massive machines are among the largest ever installed in the world and were transported in quartered sections to

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  • Gearless autogenous semi autogenousmills by ..

    Aug 29 2013  36 ft. x 17 ft. 16 000 HP Gearless SAG Mill. OFTEN REQUIRE LESS FLOOR SPACE With the proven use of gearless drive technology limitation of AG/SAG mill size due to gearing constraints has been

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  • Holding Down Bolts For Abb Sag Mill

    ABB’s new Gearless Mill Drive generation Maintenance . Ball Mill SAG Mill Figure 2 Core pressing system with spring plate/washer and re tightening statistics in a typical installation Access to the inside of the motor and the cooling system The easier the access to the inside of the motor is the more convenient and efficient is the work on the motor.

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  • Mining Weekly

    Jun 26 2009  Gearless mill drives 26th June 2009 GMDs are used on the larger ball and semi autogenous grinding SAG mills where power transfer through the con ventional gearbox pinion and girth gear

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  • TECHNICAL AND COMMERCIAL BENEFITS OF GEARLESS MILL

    The Gearless Mill Drive the Work Horse for SAG and Ball Mills R Errath Errath R. 2006 The Gearless Mill Drive the Work Horse for SAG and Ball Mills SME Conference St. Louis.

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  • 38 X 22 EGL GRATE DISCHARGE SAG MILL 26 000 HP

    SAG mill trommel Mill braking system Hydraulic jacking system Portable hydraulic power unit. Motor and Drive 26 000 HP 19.4 MW Siemens wrap around drive motor 60 Hz synchronous Gearless wrap around Differential protection. Related products. ID L01061. 4.5′ X 16″ HARDINGE CONICAL BALL MILL 20 HP ID C1166.

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  • PDF

    Improving Energy Efficiency in Barrick Grinding Circuits

    The SAG mill and ball mill original design was reviewed and a change resulted in the application of a gearless drive wrap around motors on both machines. This immediately delivered energy savings as the units are inherently more efficient in transferring incoming power to

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  • Gearless AG/SAG Mills

    Minerals Industries Inc. 240 Arch Street P.O. Box 15312 York Pennsylvania USA 17405 7312 Phone 1 717 843 8671 Fax 1 717 845 5154 minerals E mail mineralsprocessingfo Gearless Autogenous/ Semi Autogenous Mills. Open the catalog to page 1. The sights and sounds of large grinding mills in operation are

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  • Collahuasi sag mill failure

    SAG Mill SuccessStart with the Basics womp int. SAG Mill SuccessStart with the Basics Minera Doa 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 midJanuary 2007 finally began full replacement of the motor stator on the 21MW gearless

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  • Cobre Panama starts up gearless mill drive systems

    Oct 29 2019  In all two 28 megawatt gearless mill drive systems GMDs are in use at the mine s 40ft SAG mills and four 16.5MW GMDs are employed in 26 football mills. Gearless mill drives are the workhorses for grinding operations which are at the heart of any mine ABB s Cobre Panama project manager Rene Chacon said.

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  • sag mill drives girth gears at 18000 hp motors

    sag mill drives girth gears at 18000 hp. ft 7.9 x 4.2 m SAG Mill 6 300 HP 4700 kW Motor Variable speed drive available at extra cost. Mill includes main drive motor Slip Ring 6 300 HPliquid resistance starter includes variable speed drivefeed hopper bell housing jacking cradles hydraulic jacks and hoses Poly Deck

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  • sole plates for sag mill

    28 MW GMD for a 40 SAG mill 28 MW GMD for 42 SAG mill Whether it is size or an installation at the highest altitude 4600 m.a.s.l. ABB s GMDs are well positioned to contribute to the building of larger and ever more powerful mills. Leading the gearless mill drive evolution The ABB gearless mill drive GMD is the most powerful

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  • Ring gear drives huge grinding mill

    Mar 01 2000  But this is no ordinary mill. With inside dimensions of 36 ft diam. and 19 ft long this semi autogenous grinding mill SAG see next section will use a 43 ft diam. ring gear drive to transmit

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  • PDF

    Instability in gearless mill drive motors

    Instability in gearless mill drive motors by Peter Warner Anglo American Technical Division In 2006 Anglo Platinum ordered two 26 foot ball mills from FFE Minerals Vecor and two 17 5 MW gearless mill drives GMDs from ABB for the 600 kilo tonne per month concentrator for the Potgietersrust Platinum North expansion project.

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  • AG Mill SAG Mill

    AG Mill SAG Mill AG Mill SAG MilLK Products Made In China China Manufacturer. Our largest mills has been delivered to SINO Site to date are Ø12.2m x 11m 28MW Gearless Drive AG Mills and Ø7.9m x 13.6m 2x8 MW Twin Pinion Drive Ball Mills. These mills are scheduled of start up on 2012.

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  • Updates on geared vs gearless drive solutions for grinding

    The capability of currently available systems in terms of power and mill diameter Efficiency in terms of overall electrical power consumed vs mechanical output power Among the many reasons that geared drives on large SAG mills are not favoured is due to not having an efficient variable speed drive option 60 to 80 critical speed which

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  • PDF

    SAG Milling in Australia Revised Submission

    The CCV ring motor gearless drive is used at Cadia 20 MW and Olympic Dam 18 MW . It has been the industry standard for SAG mills above 13 MW capacity. However pinion systems to 8 MW per pinion and dual motor systems with quadruple pinions extend the range of gear driven mills to a theoretical limit of 32 MW. The Ernest Henry SAG mill

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  • PDF

    THE ENGINEERING AND PROCESS EFFECTS OF CHOOSING A

    The definition of mill speed that the process engineer should specify to the motor designer or vendor is mill speed as ϕRPM revolutions per minute. The motor designer or vendor will convert the specified rated mill speed into the speed of the motor ωrated as Hz which for a Gearless Mill Drive is simply ϕRPM ÷ 60. For a gear driven

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  • PDF

    C O N S U L T I N G L T D TECHNICAL MEMORANDUM

    Gearless motors have no loss generating mechanical connections between the motor output and the mill shell the mill shell is ac tually the motor s rotor so it has 100 mechanical efficiency in transmitting motor output to the mill shell. Synchronous motors have 98.5 efficiency in converting motor output to power at the mill shell due to the

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  • Grinding Mills

    The circuit comprises a SAG mill 12 m diameter by 6.1 m length belly inside liners the effective grinding volume two pebble crushers and two ball mills in parallel closed with cyclones. The SAG mill is fitted with a 20 MW gearless drive motor with bi directional rotational capacity. Reversing direction evens out wear on liners with

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  • Digital Service for Gearless Mill Drive Systems

    Jan 25 2022  ABB has released a new version of ABB Ability Predictive Maintenance for grinding which is a unique advanced digital service to maintain assess and analyze gearless mill drive GMD systems.. The upgrade means that ABB Ability Predictive Maintenance for grinding is now cloud based instead of sited on premises and includes a brand new mobile application that

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  • Gearless Mill Drive Sales Rev Up to Meet Demand

    The SAG mill drive package is rated at 21 MW the ball mill drives at 16.4 MW. An order in May 2008 valued at more than €20 million from Aurox Resources Ltd. to supply gearless drives for a 34 ft diameter 14 MW SAG mill and a 26 ft diameter 17 MW ball mill for an iron ore project in Western Australia.

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  • PDF Operation of High Power Cycloconverter Fed Gearless

    Manuscript submitted circuit of a typical drive for a high power SAG mill. The for review October 15 2004 and released for publication December 29 2006. R. A. Errath 15000 HP gearless ball mill drive in cement Why not a normal shutdown of the drive or as a protection measure in IEEE Trans. Ind. Appl. vol. 32 no. 3 pp. 663

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  • ABB successfully commissions six gearless mill drives at

    Oct 25 2019  Two 28 MW gearless mill drive systems GMDs are operating in the company s 40 foot SAG mills and four 16.5 MW GMDS are employed in 26 football mills along with associated control systems. Gearless mill drives are the workhorses for grinding operations which are at the heart of any mine.

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  • twin drive sag mill

    28 MW GMD for a 40 SAG mill 28 MW GMD for 42 SAG mill Whether it is size or an installation at the highest altitude 4600 m.a.s.l. ABB s GMDs are well positioned to contribute to the building of larger and ever more powerful mills. Leading the gearless mill drive evolution The ABB gearless mill drive GMD is the most powerful

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  • abb gearless mill drives Triturador de conos

    Jan 22 2021  Gearless Mill Driveslibrary.e.abb. 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 Award of Contract March 1999 Start of Operation June 2001 ABB’s scope of supply Four complete Gearless Mill

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  • Update On JHEP SAG Mill Drive Selection

    gearless Additional considerations in selection of JHEP SAG mill drive Concrete madnessfoundations of SAG Mill gearless drive A gearless drive will require about 250 more concrete and more importantly more reinforcing steel in the foundations than the equivalent dual pinion drive = This picture shows only what is above the ground.

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  • to Design and Supply the World’s Largest SAG Mill in

    Oct 05 2010  The ABB gearless mill drive system will power the SAG mill with a variable speed drive that allows the mill to start smoothly with minimal mechanical stress and with automated ‘dropped charge’ protection. unveiled the first gearless SAG mill which has grown through stages of 38ft 11.6m and 40ft 12.2m until today’s

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  • SAG Mill

    Since the early 1980s we have been designing and manufacturing Semi Autogenous Mill SAG Mill and Autogenous Mill AG Mill under the Fuller Traylor brand. Semi autogenous grinding uses a minimal ball charge in the range of 6 15 while autogenous grinding uses ore only. SAG and AG Mills operate by lifting ore/grinding media and dropping it on

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  • Cadia s Semi Autogenous SAG Mill Motor removed replaced

    Feb 05 2022  Dubbed the Semi Autogenous SAG Mill Motor Replacement project the plan engaged over 150 personnel at its peak involving the removal of the old gearless motor of the monstrously sized mining

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