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gearless ball mill drive

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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 ...

Gearless mill drives - ABB

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

Gearless Mill Drives - ABB

Antamina Compania Minera Antamina S.A. 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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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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Nov 08, 2016 · ABB Motor Gearless Mill Drive GMD System

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The gearless drive and the CCV must be designed to resist the short-circuit current and the generated high torque. ... 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. 663–669, May/Jun. 1996. response to abnormal ...

Electromagnetic design and thermal analysis of module ...

With the large-scale development of the ball mill, the direct-drive gearless ball mill has emerged, eliminating the limitation of the transmission torque of large gear. However, it is difficult to process, transport, install and maintain the gearless ball mill because of its vast volume, and the coils cannot be decoupled freely.

GMD technology for Minera Escondida - Mineral Processing

Jul 08, 2014 · GMD technology for Minera Escondida. 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.

gearless ag/sag mills

Gearless Sag Mill Maintenance Schedules. 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

Gearless Mill Drives | Beneficiation | Siemens Global

Sep 20, 2021 · That is why the gearless drive of a grinding mill is one of the most crucial pieces of equipment in the concentrator and why it is subject to particularly high demands. Siemens has provided about 80 SIMINE Gearless mill drives to the mining industry since 1980. In these thirty-plus years, SIMINE Gearless mill drives have accumulated a combined ...

advantages of gearless drives on ball mills

Gearless mill drives - Grinding (ABB in Mining) - ABB Group. ABB's Gearless mill drive system is the most powerful mill drive system in the market to power

gearless drive mills and crushers

Gearless Drive Mills And Crushers. gearless drive mills and crushers in chile; gearless drive mills and crushers in chile ABB’s GMD is the most powerful mill drive system in the market to power semiautogenous S ball and autogenous mills This ’workhorse’ for grinding operations combines a robust servicefriendly and fit for purpose design to provide highest throughput.

Electromagnetic design and thermal analysis of module ...

With the large‐scale development of the ball mill, the direct‐drive gearless ball mill has emerged, eliminating the limitation of the transmission torque of large gear. However, it is difficultto process, transport, install and maintain the gearless ball mill because of its vast volume, and the coils cannot be decoupled freely.

GMD technology for Minera Escondida - Mineral Processing

Jul 08, 2014 · GMD technology for Minera Escondida. 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.

Gearless Warp Around SAG Mill - 911metallurgist

Nov 11, 2018 · Gearless Warp Around SAG Mill. 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

GRINDING: ABB commissions six gearless mill drives at ...

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.

Current issues on high-power cycloconverter - Fed gearless ...

Main current issues of cy cloconverter-fed gearless. drives for grinding applications were presented, hi ghlight-. ing: a) Complex nature of the process with la rge units, b) Reliability and ...

electric magnet motor, pmsm motor, direct drive motor ...

Qingdao Enneng Motor Co., Ltd. (abbreviated as “ENNENG”) is a high-tech enterprise integrating R & D and manufacturing of permanent magnet motors. With more than dozens of patents, Enneng has ranked as “100 Innovative Enterprises” in Qingdao and we are selected as the permanent member of Qingdao Motor Association.

Making remote mines and low ore grades economical and ...

The six ABB GMDs, which are the most powerful mill drive systems on the market are all now in continuous operation. Two 28 MW gearless mill drive systems (GMDs) are operating in the mine's 40 foot SAG mills and four 16.5 MW GMDS are employed in

china ball mill with hydraulic gearless drive - Martence

Mill hydraulic drive- university courses.China ball mill with hydraulic gearless drivemar following thesag millwill be twohp ball mills, each one ft and a ringmotor gearless driveeither of which wraps around the mill.More info; eaton rsquo s newhydraulic inching driverotates grinding,.

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.

An electrical impact study between variable speed dual ...

Oct 22, 2015 · To achieve this target, efficiency (mechanical and electrical losses) and speed adjustability have become more crucial than ever in the selection of the Ball mill drive solution. 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 ...

gearless ag/sag mills

Gearless Sag Mill Maintenance Schedules. 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

SIMINE Gearless mill drives

SIMINE Gearless mill drives – outstanding 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

siemens/mining SIMINE Gearless Mill Drives

Whether you’re talking about SAG or ball mill, space is a sensitive subject, especially in the concentrator. That’s why we always design our SIMINE MILL Gearless Drives to combine maximum performance with limited space requirements. Suitable foundation and adequate ground conditions Since our solutions have a low motor weight, this notice-

advantages of gearless drives on ball mills

Gearless mill drives - Grinding (ABB in Mining) - ABB Group. ABB's Gearless mill drive system is the most powerful mill drive system in the market to power

Gearless Drives for Ore Conveying and Grinding - Cmms ...

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

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.

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.

Preprint 13-050

Presently the gearless drive is more costly than the complete mechanical portion (mill rotating element and accessories supplied by the mill manufacturers) and hence the customer/consultant needs to have two parties to deal with from the start of any project. There is an interface between the mill vendor and the gearless motor supplier.

Literature Review: Gearless Motor Failures – A 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 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 ...

Ring-geared mill drives - Grinding | ABB

Ring-geared mill drive system. High performance and flexibility in grinding. Decreasing global mineral resources, exploitation of lower ore grades in more remote locations and extreme environmental conditions lead to increased material processing and potential rise in CAPEX. The need for reliable and robust grinding solutions is driving the ...

US3272444A - Gearless rotary mill - Google Patents

US3272444A US305076A US30507663A US3272444A US 3272444 A US3272444 A US 3272444A US 305076 A US305076 A US 305076A US 30507663 A US30507663 A US 30507663A US 3272444 A US3272444 A US 3272444A Authority US United States Prior art keywords mill rotor motor receptacle gearless Prior art date 1963-08-28 Legal status (The legal status is an assumption and is not a legal

gearless mill drive - Ninja-te.ch

15000 HP gearless ball mill drive in cement-why not . 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 up-sizing of cement grinding installations and the ...

Go gearless with ABB’s mill and conveyor drives for more ...

May 25, 2021 · ABB’s state-of-the-art gearless mill drives (GMD) and gearless conveyor drives (GCD) have already become differentiators when combined with advanced digital services. These two technologies have become an ideal and futureproof solution for our industrial customers. We delivered the world’s first gearless mill drive to Lafarge Cement in ...

Michael Salinas – Gearless Mill Drives electrical project ...

Gearless mill drives service inspection, improvements, remote and advanced on-demand troubleshooting at copper and gold mine companies around the world, basically assigned to the following countries: Chile, Perú, Indonesia, United States, Brazil, Dominican Republic, Sweden, etc.