gearless mill drive system

  • Gearless mill drivesGrinding ABB

    Go gearless to meet your business objetives by exceeding standard availability targets in your grinding operations. 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

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  • Gearless Drivesstatic.dc.siemens

    pace. In 1996 Freeport ordered the first gearless drive for a 38-foot SAG mill located at the company s Grasberg plant in Indonesia. This gearless drive pro-vides an astonishing 20 400 kW of power. In 1998 Siemens supplied the first gearless drive for a 40-foot SAG mill at the Cadia Hill Mine in Australia.

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  • Gearless Mill Drive Sales Rev Up to Meet Demand

    Gearless mill drives are becoming the drive system of choice on large AG SAG and ball mill installations for new projects and existing mill expansions. At least 31 GMDs have been ordered from Siemens and ABB for example over the past year or so for mills ranging up to 40 ft in diameter and with drive

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  • Six gearless mill drives commissioned at Panama s newest

    Oct 28 2019 · Two 28 MW gearless mill drive systems (GMDs) are operating in the company s 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

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  • 2009 Gearless Mill Drives

    Marsh 1 WHY shift to the gearless drives in mineral processing Mill sizegrinding 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

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  • Increasing Availability through Advanced Gearless Drive

    The Gearless Mill Drive system consists of the ring motor with its feeding cyclconverter pre-installed in an E-house. It also includes the excitation rectifier the automation system (for mill and motor) including HMI monitoring and diagnostic system MCC s (for mill and drive auxiliaries) differential

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  • Managing and monitoring gearless mill drives

    Since designing its first gearless mill drive in the late 1960s ABB has accumulated over forty years of experience in optimizing gearless solutions for grinding applications. ABB says its GMD "is the most powerful mill drive system on the market."

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  • Gearless Ball Mill Operation

    The reliability of large diameter high horsepower ball mill is paramount when large production and minimum downtime is required. The 17 ft. x 56 ft. double compartment ball mill at St. Lawrence Cement Company has the first gearless drive built in North America and has the world s largest hydrodynamic bearings currently built and running.

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  • Ball Mill Drive Systemuitvaartzorg-lenaerts

    Gearless mill drives. 2 GEARLESS MILL DES 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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  • gearless mill driveMining Magazine

    Mining MagazineLatest mining and investment news. ABB continues drive contract for Cerro Verde six years on. In the March quarter of 2012 ABB was contracted to supply gearless mill

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  • ABB commissions gearless mill drive system at Peru s

    ABB commissions gearless mill drive system at Peru s largest gold mine. 09 June 2008. ABB announced it has successfully completed commissioning of a 16.5 MW gearless mill drive (GMD) system for a SAG (semiautogenous) mill at Minera Yanacocha. The mine located in Cajamarca Peru is the largest gold producer in Latin America.

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  • sag mill motorsrbritiin gearless sag mill slip ring

    Sag Mill Wrap Around Motor ABB acquires ring motor business from Alstom Acquisition enables ABB to further strengthen gearless mill drive system business. Zurich . also called wrap-around motor or . is typically fed to SAG . Chatear con ventas » READ MORE

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  • Cobre Panama starts up gearless mill drive systems

    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

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  • ABB gearless mill drive digital International Mining

    The company selected ABB s 26 MW gearless mill drive system (GMD) for the mine s 40 ft SAG mill as well as other drives electrical infrastructure equipment and a long-term service agreement (LTSA). This is expected to reduce operating costs improve process throughput and reliability while saving energy and keep equipment in top form.

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  • Gearless Drives for Ore Conveying and GrindingCmms

    Fig. 2. Drive pulley and gearless drive of the conveyor belt.. The drive system of a belt conveyor has to provide the required speed and torque at any point of operation. This is ensured by using the appropriate converter technology and considering the engineering of the system with an integrated approach.

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  • Revolutionary Drive Controller for Gearless Mills

    Ringmotor of the Gearless Mill Drive (GMD) System. CYCLOCONVERTER Principle The Cycloconverter is a frequency changer which converts a poly-phase voltage with the frequency f1 into a single or poly-phase voltage with a different lower frequency f2. On Gearless Mill Drives (GMD) the operational output frequency varies from 0.3 Hz up to about 6 Hz.

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  • Cobre Panama starts up gearless mill drive systems

    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 "

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  • Siemens Delivers First Gearless Mill Drive System to

    Sep 13 2006 · Simine Mill GD provides a gearless drive with no mechanical parts between the motor and the mill. Stepless adjustment of the rotational speed aids optimum start-up and means that the system can be controlled in accordance with the varying demands of the material in the mill. This reduces wear maintenance and energy consumption.

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  • A Mechatronic Solution Design and Experience with Large

    and its control system allows additional features for operation and maintenance like creeping and inching (Figure 3). The SAG mill drive is normally designed and optimized for the individual project. The requirement of the special process defines the size of the drive the reques ted power and the operating speed range. The

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  • ABB successfully commissions largest gearless mill drive

    ABB s delivery included one gearless mill drive system (GMD) for a 40-feet semi-autogenous mill and two low-speed dual pinion ring-geared mill drive systems (RMDs) for two 26-feet ball mills making Mount Milligan s grinding circuit one of

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  • Six gearless mill drives commissioned at Panama s newest

    Oct 28 2019 · Two 28 MW gearless mill drive systems (GMDs) are operating in the company s 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.

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  • ABB Gearless Mill Drives are Operational in Chile E MJ

    Officials at power and automation technology group ABB have announced the successful commission of three gearless mill drive systems at Codelco s Mina Ministro Hales (MMH) in Chile the state-run Codelco is the No. 1 copper miner in the world s most copper-prolific nation ABB also provided engineering installation training and startup assistance.

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  • Gearless mill drive system in iron ore ­processing

    Mar 01 2012 · Gearless mill drive system in iron ore ­processing Diagramm eines getriebelosen Mühlenantriebssystems von ABB # Diagram of ABB s gearless mill drive system 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.

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  • Gearless Mill Drives Beneficiation Siemens Bulgaria

    The SIMINE Gearless mill drives pump system significantly enhances concentrator productivity by eliminating the reducer gear between motor and pump and all corresponding maintenance. In addition the cyclone pumps with variable speed can adjust their energy consumption to the optimized flow of pulp resulting in energy savings of up to 30 .

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  • Gearless Ball Mill Operation

    Table of ContentsStructural Design of Mill and BearingsStructural Design of the BearingOperational ResultsMaintenance of "Gearless Drive" Mill The reliability of large diameter high horsepower ball mill is paramount when large production and minimum downtime is required. The 17 ft. x 56 ft. double compartment ball mill at St. Lawrence Cement Company has the first gearless drive

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  • An electrical impact study between variable speed dual

    When mill power is between 18 and 20 MW which is the current manufacturing limit of ring geared mills 2 either a gearless mill drive (GMD) or a ring geared mill with dual pinion motors can be chosen. Selecting between gearless or ring geared design is mostly dependent on size of the mill and power and speed requirements 3 .

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  • Gearless Mill Drives Beneficiation Siemens Bulgaria

    The SIMINE Gearless mill drives pump system significantly enhances concentrator productivity by eliminating the reducer gear between motor and pump and all corresponding maintenance. In addition the cyclone pumps with variable speed can adjust their energy consumption to the optimized flow of pulp resulting in energy savings of up to 30 .

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  • Gearless Mill Drive Sales Rev Up to Meet Demand

    Gearless mill drives are becoming the drive system of choice on large AG SAG and ball mill installations for new projects and existing mill expansions. At least 31 GMDs have been ordered from Siemens and ABB for example over the past year or so for mills ranging up to 40 ft in diameter and with drive power ratings up to 28 MW.

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  • Direct Drive vs. Gearbox Progress on Both Fronts Power

    "The improvements in direct drive are going to push gearbox technology to be more reliable " Felker said. "The industry is making progress on both fronts." More Power Engineering Issue

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  • ABB successfully commissions six gearless mill drives at

    Nov 07 2019 · The six ABB Gearless Mill Drives which are the most powerful mill drive systems on the market for semi-autogenous (SAG) ball and autogenous mills have been installed since late last year and are all now in continuous operation.

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