The first Gearless Mill Drive (GMD) with a power of MW was installed 1969 in a cement milling process in the cement plant Le ... The question what drive system is optimal for SAG and ball mills is project specific and depends on the plant layout and the design of the grinding circuit. When drives systems are compared the main
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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. ... All drives are Gearless Motor Drives from ABB. Each line will also include an FL cone crusher solution with state of the art digitalisation and control system. The first production line will be delivered ...
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Significant energy and cost economies can be achieved with a gearless mill drive working with a ball mill in these upper power ranges. This prospect should also be of interest to the cement industry. The technology is available for an upsizing of cement grinding installations and the gearless mill drive is a proven, reliable drive.
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The invention discloses a kind of annular permanent magnet gearless ball mill direct driving motor, belong to ball mill and drive equipment technical direct driving motor includes stator and rotor, and wherein, rotor is fixedly mounted on the outer surface of ball mill barrel by sectional type rotor core, and concentric with ball mill barrel；Stator is stagewise stator, uses the ...
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The gearless drive comprises a synchronous motor designed to operate at low variable frequency from a cycloconverter power supply (CCV). ... (flotation feed) for a typical 36,364 mtpd (40,000 stpd) semiautogenous ball mill circuit treating a copper porphyry ore. Capital costs were developed for the above two fixed speed drives and for the five ...
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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 difference between the measured stresses at Telfer and Antamina is that the liners in the Telfer ball mill had been wedged by ball scats and ore as shown in Figure 4 and thus the liners supported ...
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Combine ABB's variablespeed drive system with advanced process control ABB Ability™ Expert Optimizer for grinding to provide maximum mill control. It can be applied to new or existing AG, SAG and ball mills, powered by either ringgeared mill drives (RMD) or gearless mill drives (GMD). This solution was designed to control, stabilize and ...
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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 football mills with 22 ...
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the world's most powerful gearless mill drive (GMD) systems ever made to Minera Chinalco's Toromocho mine in Peru. The GMD for the 40foot SAG mill has a power rating of 28 MW, and the GMDs for the two 28foot ball mills have a power rating of 22 MW. All of them are designed to operate at the extreme altitude of 4,600m above sea level.
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siemens product manager. low iron prices2005. ft idstart. Embed Size (px) 344 x 292 429 x 357 514 x 422 599 x 487. Gearless Mill Drives. Machinery Risk Solutions Practice. Matt Dugalic, MARSH MRSP Risk Consultant, VPKurt Tischler Dipl.Ing., Siemens Product Manager, Mining. Page 2.
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The first gearless mill has recently been put into service in Le Havre, France. This is probably the world's largest cement mill. The cement output is rated at 200 ton/h, and the motor rating is 8700 hp (7400 kW) at 15 r/min. For the first time in the history of tube mills the driving motor has been built directly on the mill, i. e., the mill drum is also the motor shaft.
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Siemens' answer is the latest gearless drive technology for grinding and conveying. Gearless drive solutions are surpassing the mechanical limits of con ventional drive systems serving to utilize the principle of economies of scale.
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Gearless Mill Drive Foundations: We have never encountered a foundation vibration problem with operating gearless driven mills, although there may be examples of this about. ... This means that SAG mill foundations behave very differently from ball mill foundations. 4 Mill Designer Stiffness Criteria ...
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Abstract—A cycloconverterfed gearless mill drive is a drive system that has hardware and software protection functions to protect the equipment in case of abnormal operating conditions, malfunctions or failures.
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The Download Center provides a simple way to locate download manuals, certificates, FAQs and more. Registration and login to the portal will unlock the „myIN" features, allowing you to directly submit service requests, store product configurations, and so much more. Our Innomotics Experts are always available to support so feel free to ...
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The SAG mill drive package is rated at 21 MW; the ball mill drives at MW. • An order in May 2008 valued at more than €20 million from Aurox Resources Ltd. to supply gearless drives for a 34ftdiameter, 14MW SAG mill and a 26ftdiameter, 17MW ball mill for an iron ore project in Western Australia.
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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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These are SAG mills with m diameter and 28 MW GMD drive and ball mills with m diameter and 22 MW GMD drives. The first production line is set to go into operation in 2022. ... Chile´s Minera Los Pelambres Ltda. is operating a new SAG mill and a new ball mill equipped with gearless drives systems by Siemens. The mills are intended to ...
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Gearless motor for a highpower mill. Fig. 8. Power circuit topology of a cycloconverterfed mill drive with two threephase windings. Fig. 7. Power circuit topology of a cycloconverterfed mill drive with one Fig. 9.
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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, servicefriendly and fit for purpose design to provide highest throughput, reliability and availability for your processing plant. eBook: Grinding transformation
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Ringmotor of the Gearless Mill Drive (GMD) System. CYCLOCONVERTER Principle The Cycloconverter is a frequency changer which converts a polyphase voltage with the frequency f1 into a single or polyphase voltage with a different, lower frequency f2. On Gearless Mill Drives (GMD), the operational output frequency varies from Hz up to about 6 Hz.
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CHH624 Gearless Mill Drive Operation and Maintenance Course goal The goal of this course is to provide participants with the required practical knowledge and information on safe operation and maintenance of the gearless mill drive (GMD) system. This training will help to enhance the operation and the maintenance of the GMD in order to ensure
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Siemens' gearless drive technology of to % 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
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Download Citation | Ball mill driven with gearless mill drive | This paper introduces how PT Semen Bosowa/Indonesia considered the installation of a cement plant gearless mill drive, the criteria ...
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• 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 ), ABB's GMDs are well positioned to contribute to the building of larger and ever more powerful mills. — Leading the gearless mill drive evolution
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Antamina Compania Minera Antamina 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
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ABB continuously extends technical and performance frontiers of ringgeared mill drive (RMD) technology to fit your site requirements. We provide optimized mill drive solutions for all types of ringgeared mills: low and high speed, single and dual pinion, with and without a gearbox — all designed for reliable, long life and low maintenance ...
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ABB expert unveils Machine Learningbased platform for predictive maintenance of Gearless Mill Drives (GMD) Web story ... (GMD) that drive the SAG mills and ball mills in largescale mining. The executive highlighted the remote diagnostic service, arguing that GMDs are crucial equipment in the grinding process, therefore, "ensuring their ...
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