gearless drive mills

Concepts of Gearless Ball-Mill Drives - IEEE Xplore

Abstract: In the past the conventional method of driving large ball mills included some form of speed reducing gear between the higher speed driving motor and the lower speed ball mill. Process developments in the mining and cement industries have increasingly tended toward the use of ever larger ball mills for grinding their products.

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Gearless mill drives - ABB

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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Cycloconverter Fed Capacitor Start Capacitor Run Induction Motor Drive ...

Nov 28, 2020Cycloconverter is a naturally commutated converter with bi-directional power flow capability. There are variety of applications of cycloconverter such as gearless motor drive in cement industry, centrifugal pump, electric traction, rolling mills, variable speed constant frequency (VSCF) system, ship propellers etc. Evaluation of cycloconverter fed semi-autogenous grinding (SAG) mills have been ...

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Sentinel: Siemens Gearless Mill Drives - YouTube

Sentinel: Siemens Gearless Mill Drives, 38,917 views 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...

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Overview of Mv Drive Technologies in Mines and Future Scope - Ijiert

motors of max of 38 MW but for low speed. The reliable operation of the drive is essential to prevent business interruption loss which can be huge. Presently Gearless and Geared Grinding mills are used for the purpose. Geared mills use Induction motors and Synchronous motors but there is a limitation on gears for power greater than 9 MW.

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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," ABB's Cobre Panama project manager Rene Chacon said.

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Sag &Autogenous Mill Adapts to Gear or Gearless Drive Arrangements ...

Our largest mills has been delivered to SINO Site to date are Ø12.2m x 11m 28MW Gearless Drive AG Mills and Ø7.9m x 13.6m 2x8 MW Twin Pinion Drive Ball Mills. These mills are scheduled of start up on 2012.

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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.

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mill drive motor

Aug 12, 2022Our GMD 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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Gearless mill drives - Mining Weekly

Gearless mill drives (GMDs) have been installed on platinum-miner Anglo Platinum's Potgietersrust Platinum (PPRust) 600 000-t/m concentrator. GMDs are used on the larger ball and semi-autogenous...

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to supply conveyor to major copper-gold mine

6 days agoFLSmidth has been chosen to supply an overland conveyor (OLC) for a large, established copper-gold mine in Southeast Asia, which follows a large equipment order from the same customer and site earlier in 2022. The pit-to-plant conveying system, which is over 5 km in length, has gearless drive technology.

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Gearless mill drive order - Cement Lime Gypsum - ZKG

ABB has received an order for the first gearless mill drive (GMD) system ever to be installed in an Indian manufacturing plant. The order was placed at the end of October 2009, by the Indian cement manufacturer Lalitha Cement Ltd. (LCL), located in Hyderabad, the capital of the Indian state of Andhra Pradesh.

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Gearless Transmissions for Large Wind Turbines: The history and Future ...

If these drives were operated in the opposite sense, as isrequired by renewable power plant, which starts with a low-speed, irregular input and drives an electrical generator,they would provide a gearless solution for the wind turbine industry.The traditional ruggedness and reliability characteristics which make them attractive for large power ...

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Operation of High-Power Cycloconverter-Fed Gearless Drives Under ...

The gearless drive and the CCV must be designed to resist the short-circuit current and the generated high torque. The feeding circuit breaker of the drive must provide a signal to the CCV control on when it is going to open. With this signal, the control must block the gating pulses of the CCV. Fig. 6.

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Gearless mill drives - Grinding | ABB - Mining

Gearless mill drive system, There are 24 results listed below, Mine hoist upgrade for production increase at LKAB in Sweden, Underground mining, Service, Automation, E-house, AC/DC drives, Upgrades, Project management and execution, Friction hoist with skip and skip/cage, Production hoists, Mine hoist brake systems,

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Geared and gearless Drives of Tumbling Mills - Grinding ...

Looking at SAG mills for instance there are huge differences in CAPEX regarding their different drive systems. Especially in the the multi-MW class gearless drive systems seem to be a thing because of their advantages such as variable speed control and low maintenance requirements.

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GEARLESS DRIVE - ABB wins $14M order for Malartic mill

The ABB order includes a complete 19-MW, gearless mill drive system for a 11.5-metre SAG mill. The contract includes engineering and delivery, which is scheduled for the end of 2008. The system will include a ring motor, transformer, housings and a new ABB cyclo-converter controller, AC 800PE.

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Gearless Mill Drives | Beneficiation | Siemens Global

4 days agoThe 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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The Siemens 42ft gearless mill drive, still an evolutionary design ...

The design of the Siemens 42ft Gearless Mill Drive is based on a risk-eliminating development strategy. Proven and re- liable design elements and components are implemented again. A FMECA quality procedure ensured that results of root cause analyses are incorporated in the new system.

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Mining Weekly - Gearless mill drives - Engineering News

Gearless mill drives 26th June 2009 GMDs are used on the larger ball and semi-autogenous grinding (SAG) mills, where power transfer through the con- ventional gearbox, pinion and girth gear ...

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to supply overland conveyor system for a major copper-gold ...

7 days agoFLSmidth has been chosen to supply an overland conveyor (OLC) for a large, established copper-gold mine in Southeast Asia, which follows a large equipment order from the same customer and site...

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Gearless motor drive scheme. | Download Scientific Diagram

... solution is the use of a gearless drive, where the poles of the synchronous machine are mounted directly in the external surface of the mill, as shown in Fig. 2. This solution generates a much...

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Gearless in Sweden

ABB has won an order worth $27 million from Swedish mining company Boliden to supply gearless drive systems for two new grinding mills that will increase production at one of Europe's largest copper mines.. The gearless mill drives will be installed at Boliden's Aitik mine, located near Gällivare in northern Sweden, where they will power two new 38-foot autogenous grinding mills.

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Gearless Mill Drives for Cobre Panama - Jan 2018

Of the six ABB gearless mill drives being installed at Cobre Panamá, four will power ball mills and the other two will drive SAG mills. Importantly, these massive machines are among the largest ever installed in the world and were transported in quartered sections to site for assembly in-situ.

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CiteSeerX — SME Annual Meeting - Pennsylvania State University

CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): As a result of today's requirements for larger mills with higher power demand, and in order to cope with maximizing throughput, and optimize grinding efficiency, the minerals industry is increasingly relying on the robust Gearless Mill Drive (GMD) solution. This paper describes the new features introduced with the ...

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gearless mill drive Archives - Asia Pacific Metalworking Equipment News ...

Feb 24, 2022Home » gearless mill drive. ABB Steps Up With New Version Of Digital Service For Grinding. February 24, 2022; Ashwini Balan; Moving Into Industry 4.0/IOT; ABB has released a new version of ABB Ability™ Predictive Maintenance for grinding which is a unique advanced digital service to maintain, assess and analyze gearless mill drive (GMD) systems.

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Six gearless mill drives commissioned at Panama's newest mine

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. The six ABB GMDs at the world-class Panama Cobre project ...

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Revolutionary Drive Controller for Gearless Mills

Title: Revolutionary Drive Controller for Gearless Mills Author: CHLEBOM Created Date: 4/1/2016 2:28:11 PM

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Six Gearless Drives Turn Mills at Cobre Panama | E & MJ

A twilight photo shows the six mills at Cobre Panama. (Photo: ABB) 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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GMDs: the driving force behind sustainable mill operations

May 14, 2021Gearless mill drives: better by design, GMDs eliminate the need for a ring-gear, pinion, gearbox, coupling, motor shaft and motor bearings, which are used in a conventional mill drive system to transmit the torque from the motor to the mill. Instead, the torque is transmitted through the magnetic field in the air gap between the stator and rotor.

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Gearless Drive for a Finish-Grind Mill with a Capacity of 160 t/h - INFONA

The principle of the gearless drive has already been applied to some large mills. A synchronous motor is ``wrapped'' directly around the mill cylinder and supplied by a thyristor frequency converter at approximately 10-percent system frequency. The drive thus operates at the low mill speed and dispenses with interposed gearing.

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Used Sag-mills For Sale

Buy used Sag-mills from A.M. King Industries. We can help guide you to the best solution for your equipment needs. ... Gearless SAG Mill. Inventory ID: 6C-135. UNUSED 40' x 25' (12m x 7.6m) Gearless SAG Mill. ... Wrap Around Drive. Manufacturer: FL . Inventory ID: 6C-GM01. View Details. HP: 18355: KW: 13500: Diameter: 36' (11m ...

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Grinding Mill Foundations

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. The main problems with gearless driven mills is stiffness and strength; there are several examples of cracked foundations at the supports for ring motors.

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ABB gearless mill drive system to power SAG mill - Automation

ABB delivered the world s first gearless machine drive in 1969, which is still operating at the Ciment Lamberg-Lafarge cement plant in Le Havre, France.ABB is a leader in power and automation technologies that enable utility and industry customers to improve their performance while lowering environmental impact.

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Overview of Mv Drive Technologies in Mines and Future Scope - Ijiert

Nowadays GMDs up to 38MW for 42' ball mills are reported to be in production. ADVANTAGES OF GMD 1) About 4% higher energy efficiency can be achieved with gearless drive technology. 2) No mechanical limits so high power is available at the driven component. 3) Smaller footprint of complete drive train. 4) The air gap of a GMD is large (15-20 mm).

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gearless mill drives Archives - International Mining

Gearless mill drives (GMDs) are the grinding solution of choice in challenging environments. By eliminating bolt-on mechanical components such as ring-gears, pinions, couplings and gearboxes, GMDs offer ore producers unrivalled availability, efficiency and durability, while reducing operating expenditure, according to GMD provider ABB.

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Gearless Mill Drive (GMD) animation - YouTube

A detailed animation showing the workings of a Gearless Mill Drive (GMD), created from a series of CAD files and in-situ photographs.

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ABB Commissions Gearless Mill Drivers, Shares Fall - Yahoo!

Shares of ABB Ltd. (ABB) fell 0.13% after the company announced on Jun 12 that it has completed the deployment of three gearless mill drive systems (GMDs) for Chile based Codelco's Mina Ministro ...

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ABB commissions six gearless mill drives at Cobre Panama

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...

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Gearless Mill Drives | Beneficiation | Siemens Bulgaria

Aug 15, 2022The 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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