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D&Q Mining is a high-tech company integrating R&D, production and sales. It provides mature products and solutions such as crushers, sand making, milling equipment, mobile crushing stations, etc., for aggregate, mining and waste recycling.

gearless ring motor for sag mill principles

Gearless Drives Siemens

plied gearless drives for two 36-foot ring motors, de-veloping a 12,000 kW gearless drive for the Kennecott, Utah, SAG mill and a 11,200 kW gearless drive for the El Teniente, Chile, SAG mill. In a continued call for larger, even more powerful drives, Siemens kept pace. In 1996, Freeport ordered the first gearless drive for a 38-foot SAG mill

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Gearless mill drives ABB

The poles of the gearless or synchronous motor (also called wrap-around motor or ring motor) are directly installed on the pole flange of the mill shell, turning the mill body into the rotor. The stator is then wrapped around the mill.

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Increasing availability through advanced Gearless Drive

Gearless Mill Drive (GMD) systems are characterized by having the motor wrapped around the mill like a ring. For this reason, they are often referred to as ring motors. The rotor poles are attached directly to the mill (head) flange, and hence the rotor becomes an integral part of the mill, as shown in figure 4.

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Gearless Mill Drives Beneficiation Siemens Global

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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SIMINE Gearless mill drives Siemens

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 or the pinions. What used to be downtime is now productive time. Vibration-free, low-weight, short-circuit- proof design with high stiffness

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gearless ring motor for sag mill principles Grinding

gearless ring motor for sag mill principles Gearless mill drives Go gearless ABB GroupThe gearless mill drive Grinding Mill China » Learn More. SAG mill grinding process Gearless mill drives systems In reducing the speed of the slip ring motor, is reduced and maintenance is higher due to the ring gear.

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Increasing availability through advanced Gearless Drive

Gearless Mill Drive (GMD) systems are characterized by having the motor wrapped around the mill like a ring. For this reason, they are often referred to as ring motors. The rotor poles are attached directly to the mill (head) flange, and hence the rotor becomes an integral part of the mill, as shown in figure 4.

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Gearless Mill Drives Beneficiation Siemens Global

The Siemens 42-ft Gearless Mill Drive, still an evolutionary design approach? (SAG Conf. 2015) Optimization of the drive system for a cyclone feed pump (SME 2015) Increasing availability through advanced Gearless Drive Technology (CMP 2014) Design and dynamic behavior of large ring motors for grinding mills (SMMH 2012)

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Gearless mill drive system in iron ore ­processing

ABB’s scope of supply includes two GMD systems for 38 foot 23 mw SAG mills (Fig.) comprising transformers, ring motors and complete containerized electrical houses (e-houses). The variable speed drive solution allows for optimization of the grinding processes for ores with varying properties and different mill loads.

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gearless mill drives Archives International Mining

Unlike more traditional ring-geared mill drives where a ring-shaped gear encircles the mill and drives it through one or two pinions followed by conventional motors GMDs work by mounting rotor poles directly to the mill body and surrounding it with the stator ring, meaning the mill itself is incorporated into the motor.

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gearless sag mill slip ring motor grazynawolszczak.pl

Gearless Ring Motor For Sag Mill Principles. plied gearless drives for two 36-foot ring motors, de-veloping a 12,000 kW gearless drive for the Kennecott, Utah, SAG mill and a 11,200 kW gearless drive for the El Teniente, Chile, SAG mill. In a continued call

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Siemens Supplies Gearless Drive Systems with 'Frozen

Sep 15, 2006· For the two ore-grinding mills, Siemens is supplying gearless ring motor drive systems supplied with power via cycloconverters. The SAG mill has a diameter of 38 feet (11.6 meters) and will be equipped with a 18 megawatts drive system. The 26 foot mill (8

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Ring-geared mill drives Grinding ABB

Mill application features. Frozen charge protection Detects frozen charge in the mill, minimizing equipment wear and liner replacements.; Coupling supervision Detects if a failure or slippage occurs in the couplings and stops the system in case, preventing major damages.; Stand-still detection Prevents the motors from re-starting if the mill is still rocking or moving after a stop

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siemens grinding mills with ser drive newebiz1 mining crusher

For grinding of the ore, an SAG (Semi Autogenous Grinding) mill and a ball mill will be used. For the two ore-grinding mills, Siemens is supplying gearless ring motor drive systems supplied with power via cycloconverters. The SAG mill has a diameter of 38 feet (11.6 meters) and will be equipped with a 18 megawatts drive system.

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gearless ball mill india

advantages of gearless drives on ball mills [10] R A Errath, “15 000HP gearless ball mill drive in cementwhy not!,” IEEE Get Price Technology: Gearless Drives CIM Magazine Canadian Institute of The gearless design for drive systems first used in a mill in 1969 and then a belt conveyor Gearless drives also offer an energyefficiency advantage a 29 MW drive for the 40foot SAG mill and two

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Insurability of Large Gearless Mill Drives (GMDs)

Sep 28, 2014· Introduction. We have written on risk associated with large ring motors in gearless mill drives previously [1, 2, 3]. In [1], we observed that ABB and Polysius were far too confident in 2001 when they claimed that 42 and 44 ft diameter mills and ring motors posed only manageable risks and that a 44 ft mill and GMD design was ready and waiting for a purchaser [4].

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Commissioning Variable Speed SAG Mill Gearless Drive

Ball Mills as secondary grinding stage. The Electric Drive (SIEMENS) consists a 11.000 HP synchronous motor of variable speed. General Description of the Drive. The SAG Mill Drive is mainly formed by a 11,000 HP. Ring Type Synchronous Motor of double winding, fed

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SAG Milling in Australia -Revised Submission

The CCV ring motor (gearless) drive is used at Cadia (20 MW) and Olympic Dam (18 MW). It has been the industry standard for SAG mills above 13 MW capacity. However, pinion systems to 8 MW per pinion and dual motor systems with quadruple pinions extend the range of gear driven mills to a theoretical limit of 32 MW. The Ernest Henry SAG mill

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INNOVATION NEWS Mills and GMDs ABB

he gearless motor (also called wrap-around motor or ring motor) is a very large synchronous motor. The poles of the motor are directly installed on a pole flange on the mill shell: this means the mill body becomes the rotor. The stator of the gearless motor is then wrapped around the mill. With this innovative concept the gearless mill drive

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