gearless mill drive
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ABB to supply Mill Drive systems for copper mine in Brazil
Mar 10 2008 ABB s gearless mill drives giant motor and drive systems that power ore crushing mills are more reliable and energy efficient than traditional mill drive systems and increase mill productivity This project underscores our continued leadership in providing advanced solutions for our mining customers said Veli Matti Reinikkala head
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GEARLESS DRIVE FOR CEMENT MILLAG BROWN BOVERI CIE
A gearless drive for the drum of a cement mill or the like wherein the pole wheel i.e the rotor of a low speed electric motor surrounds the drum and is connected to it by a circumferential array of uniformly spaced studs which project radially from the drum and are received in a similar array of uniformly spaced recesses located in the pole wheel structure.
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ABB buys ring motor business to boost its gearless mill
Jul 30 2013 ABB is buying Alstom s ring motor business to enhance its gearless mill drive GMD activities The business based in Bilbao Spain has about 120 employees and achieved a turnover of €57m in 2012/13 It will become part of ABB s Process Automation division The financial details of the deal have not been revealed.
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Gearless mill drive reliability ABB Ability
The gearless mill drive eliminates all mechanical components of a conventional mill drive system such as ring gear pinion gearbox coupling motor shaft and motor bearings By mounting the rotor poles directly onto the mill the mill itself becomes the rotor of the gearless motor.
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GMD technology for Minera EscondidaMineral Processing
Jul 08 2014 ABB gearless mill drive installed 2002 at the Minera Escondida in Chile ABB announced that it will supply a new 15.7 MW gearless mill drive GMD system for a 26 ft ball mill including transformers ring motor and a complete electrical room entirely equipped to Minera Escondida/Chile.
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Go gearless with ABB s mill and conveyor drives for more
May 25 2021 A gearless mill drive is a major investment for a plant and as the beating heart of the production process is essential Thus having knowledge of how to make most of your GMD is crucial The following advanced digital service can enable optimized productivity at the highest level
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siemens/mining SIMINE Gearless Mill Drives
to low wear Drive processes The SIMINE Gearless Mill Drives rpms can be adapted to your operations at any time and are infinitely variable and uncomplicated Whether manually or fully automaticrpms can be adjusted to the properties of the ore resulting in significantly less wear to the mill lining The mill s direction of rotation can be
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SAG mills 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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Gearless mill drive GMD and digital services for Kinross
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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Sentinel Siemens Gearless Mill DrivesYouTube
Jan 19 2016 The mills at Sentinel in Zambia are amongst the world s biggest with 2 off 40 ft SAG mills complete with 28 MW drives and 2 off 28 foot ball mills with 22
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SIMINE Gearless mill drives
Gearless mill drives Longer service intervals thanks to low wear drive processes SIMINE Gearless mill drives rpms can be tailored to your operations at any time and are infinitely variable and uncomplicated Whether manually or fully automaticrpms can be adjusted to account for the proper ties of the ore resulting in significantly less
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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.
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Gearless mill drive system in iron ore processing
Jul 08 2014 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
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Customs Ruling HQ 964337Protest
Protest Gearless Mill Drive HQ 964337 Sep 04 2001 Type Classification HTSUS 8503.00.95 8504.23.00 CLA 2 RR CR GC 964337 JAS Port Director of Customs 555 Battery Street San Francisco CA 94126 RE Protest Gearless Mill Drive Dear Port Director This is our decision on Protest filed against your classification under the Harmonized
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ABB s six gearless drives at heart of first copper
Oct 24 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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Gearless Ball Mill Operation911metallurgist
Jan 09 2019 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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Protest Gearless Mill Drive HQ 964337 Sep 04 2001 Type Classification HTSUS 8503.00.95 8504.23.00 CLA 2 RR CR GC 964337 JAS Port Director of Customs 555 Battery Street San Francisco CA 94126 RE Protest Gearless Mill Drive Dear Port Director This is our decision on Protest filed against your classification under the Harmonized
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PDF Operation of High Power Cycloconverter Fed Gearless
As a final improve SAG mill gearless drive in Proc Int Conf SAG Grinding Vancouver BC Canada 2001 CD ROM ment the protection scheme has been improved to ensure that 3 H Akagi Large static converters for industry and utility applications the thyristor will not receive gate pulses when the input voltage Proc IEEE vol
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Advantages of Gearless Motor Drives in Large Ore Grinding
Nov 25 2009 Gearless motors up to 22 MW are in service in many of these ore processing plants Gearless motor drives are also known as ring motors or wrap around motors The motor consists of a large number of magnets placed circumferentially on the shell of the grinding mill This is similar to the rotor of a conventional motor.
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Control Engineering Green drives Energy efficient drive
Apr 24 2008 Baden Switzerland Gearless mill drive systems will maximize productivity and energy efficiency at a new copper mine in northern Brazil ABB says it recently won an order from Vale formerly CVRD to deliver such a system to the Salobo mine located at the Tapirape Aquiri National Forest in the state of Pará Brazil.The mine is operated by a wholly owned subsidiary of Vale formerly
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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
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gearless mill driveNinja te
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
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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
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ABB commissions six gearless mill drives at Cobre Panama
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.
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Gearlessdefinition of gearless by The Free Dictionary
gear gîr n 1 a A toothed machine part such as a wheel or cylinder that meshes with another toothed part to transmit motion or to change speed or direction b A complete assembly that performs a specific function in a larger machine c A transmission configuration for a specific ratio of engine to axle torque in a motor vehicle 2 Equipment
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Literature Review Gearless Motor FailuresA Mill
Sep 10 2014 The origins of the failure can be traced back to c 1994 when PT Freeport Indonesia ordered its first gearless drive for their 34 ft SAG mill The motor had to fit through a tunnel on the road to the site This necessitated a change in the frame design from that used in older motors to allow clearance in the tunnel 8 .
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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.
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Concepts of Gearless Ball Mill Drives IEEE Journals
Concepts of Gearless Ball Mill Drives Abstract As the horsepower drive ratings required have increased to several thousand horsepower and as advances in technologies in terms of the use and application of adjustable frequency power conversion equipment have occurred the basis for driving the ball mill directly by the driving motor with
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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
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GMD technology for Minera EscondidaMineral Processing
Jul 08 2014 ABB gearless mill drive installed 2002 at the Minera Escondida in Chile ABB announced that it will supply a new 15.7 MW gearless mill drive GMD system for a 26 ft ball mill including transformers ring motor and a complete electrical room entirely equipped to Minera Escondida/Chile.
Get PriceGMDs the driving force behind sustainable mill operations
May 14 2021 Gearless mill drives GMDs constitute a compelling alternative to traditional ring geared mill drives RMDs in such environments Both drive types can be used to power large semi autogenous SAG ball and autogenous mills but GMDs are proven to offer superior availability uptime and efficiency FL sets sights on zero water waste in
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Gearless Mill Drive systems for copper mine in Zambia
FQM has opted for Siemens Gearless Mill Drives to be used in the two SAG mills having a diameter of 40 feet and an output of 28 MW and the two ball mills with a diameter of 28 feet and an output of 22 MW With these mill drive systems there is no wear in the drive train since all forces are transferred touch free via a magnetic field.
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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.
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