gearless ring motor for sag mill principles

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SAG Mill Grinding Circuit Design - 911 Metallurgist

Figure 3: fitting of rotor poles on a large SAG Mill. Figure 2: three-phase synchronous ring motor (wrap around motor). Figure 1: the new gearless mill drive.Jun 5, 2013 . For more information: ABB continuously extends technical and performance frontiers of ring-geared mill drive technology to.

40 years of Siemens gearless drive technology

Marsh 1 WHY shift to the gearless drives in mineral processing ??? Mill size – grinding economies of scale Relative lifecycle cost Lower power consumption Robust design Avoiding critical open gear power trains Variable speed Compatibility with processing plants Engineering design efficiencies Availability Minimal downtimegearless motor drives intended for grinding mills, employed in cement plants and . The sta- tor has a ring form, giving the alternative name "ring- motor" to this.

Grinding mills -

May 26, 2011 · Commissioning and start-up of Canada's first gearless mill drive (GMD) system has been completed at Osisko Mining Corp's Malarctic project and will .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].

Updates on geared vs gearless drive solutions for grinding mills

Gearless mill drives are a well established solution for grinding applications in .. Operating Principle of Cycloconverters and its Implications. Two different . speed motors connected to two pinions and driving a ring gear, or a gearless motor.Gearless mill drives may be the key to maintaining throughput . enous-ball milling-crushing (SABC) circuits. An ABC .. quired during the ring motor lifetime.

ball mill drive motor choices - Artec Machine Systems

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.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

Gearless mill drives

SAG mill, ball mill, ring gear, dual pinion, drive systems, variable speed . is owned 75% . Without a gearbox: the motor is connected directly to the pinion and therefore a low . ABB Has Supplied Three Gearless Mill Drives, Process and Electrical Control . Pre:the principle of copper ore rollsNext:katavi mining pany limited.That's why the gearless drive of a grinding mill is the crucial piece . Online monitoring. Find out instantly how the mill and Gearless Drives are . The control principle as shown above is .. on experience with the Cadia ring motor. In the design.

Design and Optimization of Gearless Drives using Multi . - DTU Orbit

The sixty rotor poles each weigh about 1,8 t, which gives a total motor mass in excess of 400 t. The rotor poles are mounted on a flange near the feed end of the mill.gearless sag mill maintenance schedules . ABB wins order for gearless mill drive systems for copper, The SAG mill will be equipped with the new ABB 18-pulse cycloconverter The additional two GMD systems will be installed on 28 feet ball mills rated with a power of 22 MW The scope of supply also includes spare parts, commissioning support and training.

Ring gear drives huge grinding mill | Machine Design

is the world's leading supplier of gearless AG/SAG mills. . The design features motor rotor elements bolted to a mill shell, a stationary stator assembly.Jul 30, 2013 · By mounting the rotor poles directly onto the mill, the mill itself becomes the rotor of the gearless motor. The gearless motor – also called wrap-around motor or ring motor – is a very large .

INN O VATI O N - altramotion

Designing a ball mill driven by hydraulic motor. mill hydraulic drive universitycourscoin china ball mill with hydraulic gearless drive mar following the sag mill will be two hp ball mills, each one ft and a ring motor gearless drive either of which wraps around the mill. Oline ChatKey Words: Grinding, gearless mill, ring-geared mill, variable speed drives . synchronous or wound rotor motors with the power of about 2 MW. Around 10 years later, the .. Figure 2: Principle design of a 6-pulse cycloconverter. The power.