sag mill gearless drive

  • advantages of gearless drives on ball mills

    Gearless mill drivesGrinding (ABB in Mining)ABB Group. ABB s Gearless mill drive system is the most powerful mill drive system in the market to power semiautogenous (SAG The 1.2 billion expansion which saw throughput rise from 60 000 t/d to 120 000 t/d involved the addition of two new thyssenkrupp-made ball mills with ABB providing the gearless mill drives (GMD) technology. This came on top of the 33 mills the miner already had up and running as part of the existing 60 000 t/d plant at the operation.

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  • gearless mill drives ArchivesInternational Mining

    The 1.2 billion expansion which saw throughput rise from 60 000 t/d to 120 000 t/d involved the addition of two new thyssenkrupp-made ball mills with ABB providing the gearless mill drives (GMD) technology. This came on top of the 33 mills the miner already had up and running as part of the existing 60 000 t/d plant at the operation. Gearless mill drivesGrinding (ABB in Mining)ABB Group. ABB s Gearless mill drive system is the most powerful mill drive system in the market to power semiautogenous (SAG

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  • Major FL mill order for Russian copper mine includes

    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 Gearless mill drive (GMD) technology has further expanded the use of large SAG milling allowing TON to produce the world s largest SAG mill of 42 in diameter drawing power at 28 MW. Today TON is the world leading supplier of gearless SAG

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  • The operation modes of a grinding mill with gearless drive

    The gearless drive accelerates the mill slowly to the preselected speed. In the Normal Stop procedure the gearless drive reduces the mill speed to zero and stops the mill without oscillation. Inching is handled from the local control panel. The gearless drive starts the mill at low speed and stops the mill In future the 36-foot SAG mill of the new production line will be operated with a 13.5-megawatt drive. A further gearless mill drive with 22 megawatt output will ensure equally efficient and reliable driving of a ball mill with an inner diameter of 28 foot.

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  • SAG millsMetso Outotec

    Gearless mill drive (GMD) technology has further expanded the use of large SAG milling allowing Outotec to produce the world s largest SAG mill of 42 in diameter drawing power at 28 MW. Today Outotec is the world leading supplier of gearless SAG mills operating globally.

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  • large sag and ball mill drive systems

    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 In December 2001 Gold Fields acquired the St. Ives project near Kalgoorlie and only in 2003 did the new owner decide to go ahead with the project and to install the 36-ft SAG mill and its 13.5-MW gearless mill drive at St. Ives.

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  • sag mill dual pinion geared drivecudownydzien

    Both the SAG mill and ball mill are each driven by two gear units. Because on a conventional drive variant only one engagement per pinion with the girth gear is possible per side an economic power limit of about 8 MW per drive is in effect. With the DMG2 gear units Siemens said this limit expands to as much as 12 MW per drive. Get Price Siemens modernises SAG mill gearless drive in Cadia Valley. Posted by Matrix on 27th March 2012 Siemens has modernised a gearless grinding mill drive at Newcrest s Cadia Valley Operations near Orange in New South Wales Australia. This is the first time that a gearless grinding mill had been equipped with a Sinamics SL150 cycloconverter control.

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  • Integrated drive technology from Siemens enhances

    In future the 36-foot SAG mill of the new production line will be operated with a 13.5-megawatt drive. A further gearless mill drive with 22 megawatt output will ensure equally efficient and reliable driving of a ball mill with an inner diameter of 28 foot. Gearless mill drives Grinding ABB. ABB s GMD is the most powerfulmill drivesystem 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

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  • Gearless Drives for Ore Conveying and GrindingCmms

    Siemens the company that introduced Gearless Mill Drives (GMD) to mining industry started up its first GMD on a ball mill in Norway in 1980. The mill and its drive system are still in service. Today GMDs are mainly used for SAG mills between 36 and 40 feet (10.7 to Dec 19 2014 · For large mills requiring variable speed the wound rotor motor and SER drive are economical for a total rating of approximately 2MW to 16MW. Above 16MW the gearless drive (cyclo-converter) is typically used because gearboxes and pinion gears reach their present limit in size.

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  • SAG MILLINGGearless drive system from ABBCanadian

    In December 2001 Gold Fields acquired the St. Ives project near Kalgoorlie and only in 2003 did the new owner decide to go ahead with the project and to install the 36-ft SAG mill and its 13.5-MW gearless mill drive at St. Ives. SIMINE Gearless Mill DrivesSiemens. Find out instantly how the mill and Gearless Drives are.. Power 24 000 kW for a 40 ft SAG mill. Power 16 400 kW for two 26 ft . The SIMINE Gearless mill drives pump system significantly enhances concentrator productivity by eliminating the reducer gear between motor and pump and all corresponding

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  • sag mill drive arrangement canada

    Gearless Mill Drives Beneficiation Global. Benefits of continuous data acquisition from critical large drive systems in a mine operation (SME 2016) Frozen charge detection and automatic loosening with gearless mill drives (SAG Conf. 2015) Mill drives the desire for increased power and the associated limits and conditions (SAG Conf. 2015)get price Sep 10 2014 · Remedial design of the world s largest SAG mill gearless drive. In Proceedings of the SAG 2001 Conference Vancouver Canada. 8 Frank W-D. Gearless drivesExperiences and new/future developments. In Proceedings of the SAG 1996 Conference Vancouver Canada. 9 Orser T. Svalbonas V. Van de Vijfeijken M. 2011. Conga the world s

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  • SIMINE Gearless mill drives

    SIMINE Gearless mill drivesoutstanding reliability for your mine The gearless concept The gearless drive avoids any contact between the rotating mill and the static parts of the motor. This allows for contin-uous workflow without maintenance on the gears SAG mill dimensions and operating parameters is a complex problem and suffice it to say here that it is advisable in the design to provide operating flexibility to increase power demand. Design parameters chosen for the Cadia SAG mill are shown the following table. Table 2 Cadia SAG Mill Design Parameters SAG Mill Dimensions

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  • The operation modes of a grinding mill with gearless drive

    The gearless drive accelerates the mill slowly to the preselected speed. In the Normal Stop procedure the gearless drive reduces the mill speed to zero and stops the mill without oscillation. Inching is handled from the local control panel. The gearless drive starts the mill at low speed and stops the mill The gearless mill drive eliminates ring-gear pinion gearbox coupling motor shaft and motor bearings used within a conventional mill drive system. By mounting the rotor poles directly onto the mill the mill itself becomes the rotor of the gearless motor. Building a track record

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  • TECHNICAL AND COMMERCIAL BENEFITS OF GEARLESS MILL

    Gearless mill drives are a well established solution for grinding applications in the minerals and mining industries. The paper describes the functionality and technical features of such drive systems as well as their advantages compared to other drive solutions. Due to the variable speed operation the grinding process can be optimized for ores with varying grinding properties. The Siemens 42-ft Gearless Mill Drive still an evolutionary design approach (SAG Conf. 2015) Optimization of the drive system for a cyclone feed pump (SME 2015) Increasing availability through advanced Gearless Drive Technology (CMP 2014) Design and dynamic behavior of large ring motors for grinding mills (SMMH 2012)

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  • Increasing Availability through Advanced Gearless Drive

    Siemens gearless drive technology of 99.46 to 99.71 as confirmed by real operational data from the Antapaccay mine in Peru. It was the first plant worldwide to use gearless drives for both applications. KEYWORDS Gearless Mill Drives Gearless Conveyor Drives Availability SAG Mill Ball Mill Overland Conveyor Antapaccay 15 Oct 29 2019 · Two 28 MW gearless mill drive systems (GMDS) are operating in the mine s 12-metre SAG mills and four 16.5 MW GMDS are employed in 26 ball 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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  • Commissioning Variable Speed SAG Mill Gearless Drive

    Table of ContentsGeneral Description of the DriveAssembling and ConstructionComponent CharacteristicsDrive Evaluation The electric operation and design features of the 11 000 H.P. variable speed SAG mill gearless drive is presented. The function of the frequency-converter control system drive and lubrication systems are described. An analysis of the harmonic characteristic in the Supply Cobre Panama is using six ABB Gearless Mill Drives (GMDs) at its recently commissioned copper concentrator in Panama. Two 28-megawatt (MW) GMDs are operating on the 40-ft SAG mills and four 16.5-MW GMDs are employed on 26-ft ball mills along with the associated control systems.

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  • TECHNICAL AND COMMERCIAL BENEFITS OF GEARLESS MILL

    Gearless mill drives are a well established solution for grinding applications in the minerals and mining industries. The paper describes the functionality and technical features of such drive systems as well as their advantages compared to other drive solutions. Due to the variable speed operation the grinding process can be optimized for ores with varying grinding properties. For almost a decade now very good operating experiences have been gained with a total of 28 gearless ring motor drives in the cement industry driving tube mills with diameters of 2.5 to 4 meters with drive powers ranging from 3000 to about 5000kW. Why then

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  • Gearless mill drive system in iron ore ­processing

    ABB was recently contracted to supply gearless mill drive (GMD) systems for two 38 foot semiautogenous grinding (SAG) mills at the Serra Azul iron ore mine in Brazil. The Serra Azul mine unit owned by MMX Mineração e ­Metálicos an EBX Group company is located in the iron quadrangle of Minas Gerais next to Belo Horizontethe heart of Gearless Mill Drives. Go gearless to meet your business objetives by exceeding standard availability targets in your grinding operations. abbs 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

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