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  • SAG Mill Components Mineral Processing &

    2018-4-18 · SAG Mill Components. If the trunnion bearings are not reliable the complete mill is not reliable. Various trunnion bearings designs are used, ranging from fully hydrodynamic to fully hydrostatic. This makes the mill essentially a part of a synchronous .motor rotor with the stator

    A Mechatronic Solution Design and Experience with Large

    2019-11-18 · The SAG mill drive is normally designed and optimized for the individual project. The requirement of the special process defines the size of the drive, the reques ted power and the operating speed range. The electric motor creates tension forces in the air gap that tries to pull the stator towards the rotor. Therefore the stiffness of the in-

    1 x Metso SAG Mill & Siemens Motor Global Physical

    2019-2-25 · 1 x Metso SAG Mill & Siemens Motor For Sale/Re-Assignment Mill Details Type of Mill Metso SAG Mill Mill Dimensions 11,582 mm x 7,759 mm (38’ x 26’) (D x L) Default Mill Speed 7.5-8.0 RPM Mill Speed 7.56-10.08 RPM Liners Excluded Mill Drive Motor Type Wrap Around (included) Mill Drive Motor Size 19,400 KW (26,016 hp) Variable Speed Drive Yes Max.

    SAG Milling in Australia -Revised Submission

    2014-10-1 · The Ernest Henry SAG mill (11 MW) is currently the largest twin pinion single drive mill installed in Australia. Problems have been experienced with the twin pinion drive at Fimiston and with the ring motor at Cadia. At Cadia, excessive vibration and deflections in the drive stator

    Online Monitoring System for Gearless and Low

    The client required an online monitoring system for its SAG mill. The stator windings in the SAG mill motor have a history of becoming loose. If untreated, loose stator windings will lead to electrical faults with the motor and if complete dislodgement occurs, damage to the stator and rotor.

    Gearless mill drives ABB

    2021-2-16 · • 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 m.a.s.l.), ABB’s GMDs are well positioned to contribute to the building of larger and ever more powerful mills. — Leading the gearless mill drive evolution The ABB gearless mill drive (GMD) is the most powerful

    Cadia GMD Stator: Observed Behaviour and Modelling

    2014-10-2 · The Stator Behaviour. The Cadia SAG mill diameter is 40 ft and the ring motor that drives the mill is rated at 20 MW. In 1998 when the mill and motor were commissioned both were the largest machines of their type in the world. The stator exhibited vibration excursions that appeared to be related to the mill speed.

    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 Drives Siemens

    2019-11-18 · 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 located at the company’s Grasberg plant in Indonesia. This gearless drive pro-

    The Siemens 42ft gearless mill drive, still an

    2021-4-15 · not an option for a 42ft Gearless Mill Drive. The ring motor is not self-supported and needs the mill to fix the rotor poles to and it needs the mill foundation to support the stator. Finally you would need a few thousand tons of ore and possibly even an earthquake would be needed to have a realistic test environment representative of a mine site.

    ONLINE MONITORING SYSTEM FOR GEARLESS AND LOW

    2020-2-20 · The stator windings in the SAG mill motor have a history of becoming loose. If untreated, loose stator windings will lead to electrical faults with the motor and if complete dislodgement occurs, damage to the stator and rotor. Any downtime in the equipment for repairs is a loss in the ability to

    A Mechatronic Solution Design and Experience with Large

    2019-11-18 · The SAG mill drive is normally designed and optimized for the individual project. The requirement of the special process defines the size of the drive, the reques ted power and the operating speed range. The electric motor creates tension forces in the air gap that tries to pull the stator towards the rotor. Therefore the stiffness of the in-

    SAG Mill Components Mineral Processing &

    2018-4-18 · SAG Mill Components. If the trunnion bearings are not reliable the complete mill is not reliable. Various trunnion bearings designs are used, ranging from fully hydrodynamic to fully hydrostatic. This makes the mill essentially a part of a synchronous .motor rotor with the stator in its usual position around the rotor. Inherent in this

    Online Monitoring System for Gearless and Low

    The client required an online monitoring system for its SAG mill. The stator windings in the SAG mill motor have a history of becoming loose. If untreated, loose stator windings will lead to electrical faults with the motor and if complete dislodgement occurs, damage to the stator and rotor.

    Codelco Andina changes the main motors of its ball

    2020-2-24 · Due to the great technical knowledge and safety protocols of Metso Outotec in this type of work, Codelco Andina invited the company to participate in the change-out of two of its 7500 and 8500 HP SAG grinding ball mill motors in the interior of its underground operation.

    Sag Mill Syncronis Motor high axial vibration non

    2014-11-1 · On site we have a Sag Mill Driven by a 5500KW Motor. We have a vibration issue right across the Mill. The highest vibration is 30mm/sec RMS axial on the motor non drive end bearing.(White metal Bearing) The gear mesh frequency is 4200 CPM. The dominant frequency is 2400 CPM.

    (PDF) Technical Evaluation and Practical Experience of

    Voltage waveform at the rectifier input side of an 18 000-hp LCI SAG mill drive. (a) Line-to-line bus voltage waveform (11 270-V peak). (b) Average rms value of the associated frequency spectrum

    Projects Electric Motor Repairs Australian Winders

    Ball mill Rewedge Line 2 AUSTRALIA. Rewedge 13mw ball mill AUSTRALIA. 18mw ball mill rewind ABB CHILE. 12mw ABB/Alstom mill rewind USA. 2x ABB / Alstom mills installations USA. Sossego mine, mill Rewedge and coil change -BRAZIL. Sag mill rewind in Chile CHILE. 2 x Sag mill installation, Sweden SWEDEN

    SIMINE Gearless mill drives Siemens

    2021-4-14 · 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 or the pinions. What used to be downtime is now productive time.

    Insurability of Large Gearless Mill Drives (GMDs)

    2014-9-28 · 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].

    SAG Mill Components Mineral Processing &

    2018-4-18 · SAG Mill Components. If the trunnion bearings are not reliable the complete mill is not reliable. Various trunnion bearings designs are used, ranging from fully hydrodynamic to fully hydrostatic. This makes the mill essentially a part of a synchronous .motor rotor with the stator in its usual position around the rotor. Inherent in this

    A Mechatronic Solution Design and Experience with Large

    2019-11-18 · The SAG mill drive is normally designed and optimized for the individual project. The requirement of the special process defines the size of the drive, the reques ted power and the operating speed range. The electric motor creates tension forces in the air gap that tries to pull the stator towards the rotor. Therefore the stiffness of the in-

    Lrs And Ser For A Sag Mill, Ball Mill

    Sag Mill Motor Stator . Sag mill sag is an acronym for semiautogenous grinding and applies to mills that utilize steel balls in addition to large rocks for grinding the sag mills use a minimal ball charge of 6 to 15 a rotating drum throws large rocks and steel balls in a cataracting motion which causes impact breakage of larger. Online Chat

    ONLINE MONITORING SYSTEM FOR GEARLESS AND LOW

    2020-2-20 · The stator windings in the SAG mill motor have a history of becoming loose. If untreated, loose stator windings will lead to electrical faults with the motor and if complete dislodgement occurs, damage to the stator and rotor. Any downtime in the equipment for repairs is a loss in the ability to

    (PDF) Operation of High-Power Cycloconverter-Fed

    Power circuit of synchronous motor with two stator windings fed by a 12-pulse cycloconverter. Parameters of a typical synchr onous motor for a SAG Mill. complete power outage, if a

    Motor Power To Drive Ball Mill Fact Jeugd Noord

    Ball mill motor selectionrinding mill clutch selection worksheet the following information is required to properly size a vc clutch for a grinding mill application type of mill ball, autogenous, semi-autogenous sag or rod motor power. Floor Model Knee Mill Conversion Kit Microkinetics. 2019-12-17a complete pre-engineered package to automate

    M&C installs largest mill motors in Africa to date

    2014-7-2 · The four motors are Gearless Mill Drives (GMD), also known as wrap-around motors, and include two 26 MW Ball mill motors and two 28 MW SAG mill motors. Among the challenges on this project were the remote location of the mine, about 400km north-east of Kitwe, and working during a heavy rainy season, while also trying to meet an incredibly tight

    Thelarge Wrap Around Motor For Ball Mill Sale

    Tue the large wrap around motor foe ball mill.mills and gmds maarten van de vijfeijken looks at large larger and the largest units in grinding ore t he gearless motor also called wraparound 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.

    mill motor wrap around visueelvertaler.be

    ball mill wrap around motor chaletdegroupe.ch. A motor with around 1400 Horse Power is calculated needed for the designed task Now we much select a Ball Mill that will draw this power The ball mill motor power requirement calculated above as 1400 HP is the power that must be applied at the mill

    Teco-Westinghouse Custom Synchronous Motors

    TECO-Westinghouse synchronous motor are also available with brush rigging and collector rings. The complete assembly is designed for long life and is easily accessible for inspection and routine maintenance. Made of steel or other suitable materials, the collector rings are shrunk onto a steel mandrel over a Micarta insulation sleeve.

    Lrs And Ser For A Sag Mill, Ball Mill

    Sag Mill Motor Stator . Sag mill sag is an acronym for semiautogenous grinding and applies to mills that utilize steel balls in addition to large rocks for grinding the sag mills use a minimal ball charge of 6 to 15 a rotating drum throws large rocks and steel balls in a cataracting motion which causes impact breakage of larger. Online Chat

    ONLINE MONITORING SYSTEM FOR GEARLESS AND LOW

    2020-2-20 · The stator windings in the SAG mill motor have a history of becoming loose. If untreated, loose stator windings will lead to electrical faults with the motor and if complete dislodgement occurs, damage to the stator and rotor. Any downtime in the equipment for repairs is a loss in the ability to

    SIMINE MILL GD Siemens

    2019-11-18 · SIMINE MILL GD outstanding reliability at your hand The Gearless Concept The Gearless Drive avoids any contact between the rotating mill and the static parts of the motor. This enables a contin-uous workflow without maintenance on the gears or the

    Autogenous mills, semi-autogenous mills and ball mills

    2017-7-29 · part inventory. If required, ring motor drives can be fitted to shell-supported grinding mills up to the largest sizes. SAG/ball mill circuit incorporating pebble crushers and a POLYCOM® high-pressure grinding roll. SAG and ball mill for gold ore grinding. One of three SAG mills with 9.75 m diameter and 2 x 4000 kW drive power. These mills

    Motor Power To Drive Ball Mill Fact Jeugd Noord

    Ball mill motor selectionrinding mill clutch selection worksheet the following information is required to properly size a vc clutch for a grinding mill application type of mill ball, autogenous, semi-autogenous sag or rod motor power. Floor Model Knee Mill Conversion Kit Microkinetics. 2019-12-17a complete pre-engineered package to automate

    M&C installs largest mill motors in Africa to date

    2014-7-2 · The four motors are Gearless Mill Drives (GMD), also known as wrap-around motors, and include two 26 MW Ball mill motors and two 28 MW SAG mill motors. Among the challenges on this project were the remote location of the mine, about 400km north-east of Kitwe, and working during a heavy rainy season, while also trying to meet an incredibly tight

    (PDF) Technical evaluation and practical experience of

    Table III shows input currents harmonics generated by a 15 000-hp 12-pulse cycloconverter in a real installation operating with an input frequency Hz and an output frequency Hz. Fig. 14 shows the converter input current waveforms measured in a 12-pulse cycloconverter feeding a synchronous motor of 20 MW in a 38-ft SAG mill.

    mill motor wrap around visueelvertaler.be

    ball mill wrap around motor chaletdegroupe.ch. A motor with around 1400 Horse Power is calculated needed for the designed task Now we much select a Ball Mill that will draw this power The ball mill motor power requirement calculated above as 1400 HP is the power that must be applied at the mill

    Difference Between Stator & Rotor (with Comparison

    The stator and rotor both are the parts of the electrical motor. The significant difference between the rotor and the stator is that the rotor is the rotating part of the motor whereas the stator is the stationary part of the motor. The other differences between the stator and rotor are shown below in the comparison chart.

    Stuart Ayton Owner/Director (Retired) SD

    • New Zealand G1 25MVA Complete rewedge. 2010 • New Zealand ASEA 6.5MW Refiner motor, rewind. 2010 • New Zealand, ASEA 60MVA 11kV 1000RPM C1 Condenser Stator Rewind. rewind. 2010 • Indonesia, GE 3500hp & 5500hp, 200rpm, Ball & SAG Mill winding visual inspection. 2011 • Israel, Rewedge two Gas Turbine Generator Stator rewedge. 2011