Starter of SAG Mills with rotor resistance
Each mills have two motors of 8000 kW at 13.8 kV. A: For large mills requiring variable speed, the wound rotor motor and SER drive are economical for a total rating of approximately 2MW to 16MW. Above 16MW, the gearless drive (cyclo-converter) is typically used because gearboxes and pinion gears reach their present limit in size.
sincronous motor drive ball mill
A Updates on geared vs gearless drive solutions for grinding mills In particular, torque pulsations between the twin motors have been overcome ... Ring motor driven SAG mill for gold ore grinding. SAG and ball mills for com- minuting gold/. ... synchronous motors are preferred as cement mill drives. ... and slip ring motors are more commonly ...
High Voltage Motors | Siemens Electric Motors SIMOTICS ...
The high voltage compact IEC motors featuring asynchronous technology cover a power range from 150 kW to 7.1 MW, in all relevant cooling types for low installation heights – in addition to classic fin cooling, also available with tube cooling and water jacket cooling.
Ring gear drives huge grinding mill | Machine Design
The largest ringmotor- driven mill in the world is a 36-ft diam., 16,000-hp SAG mill that processes up to 2,000 tons of ore per hour. Located at Kennecott Utah Copper near Salt Lake, this mill uses...
motores molino sag siemens - salamoonlight.es
sag mill motors rbritiin gearless sag mill slip ring. gearless ring motor for sag mill principles. Acquired experience in motor maintenance on 18MW 38feet wrap around/Gearless Mill motors for Sag, and a ring motor (gearless, the wraparound principle or . sag mill motors rbritiin gearless sag mill slip ring motor READ MORE
(PDF) Autogenous and Semi-Autogenous Mills, 2015 …
Gearless mill drives (GMD) are the preferred drives for large mills requiring greater than 18MW. However, power transmitted through a gear drive is …
load sharing of dual motor grinding mill drives
dual motor grinding mill drive ... speed synchronous motor drive the ball mill, mill, Load Sharing of Dual Motor Grinding Mill Drives Cookies must be ... Preprint 13-050 - ceecthefuture Early attempts to provide load sharing on twin pinion drives used primitive ... ready for use on 2 X 10MW dual drive mills. ... gear drive grinding mill.
mills variable speed drive
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 …
ring motor for ball mill - annasweethome.de
Cement mill motors Medium voltage motors. Slip ring electric motors for ball mill cement mill and raw mills The first class manufacurer and suplier of large slip ring motors with fast delivery time and high flexibility Type asynchronous slip ring electric motor Power 160 to 5000kW Voltage 400V 690V 3300V 6000V 6600V 11000V Frequency 50Hz or 60Hz Number of poles 4 …
Mining - Grinding and Processing | WEG
Grinding and processing. WEG offers the most reliable and efficient solutions for milling plants for ferrous and non-ferrous products with their experience of mill drive systems. In the heart of a processing plant, the ball and SAG mills must be driven by solutions that adapt to the characteristics of the minerals in line with the whole process.
shell supported sag mill - lesjardinsvangogh.fr
shell supported sag mill T20:01:36+00:00 Home > stationary crushers manufacturers europe. CUSTOMER'S CASES shell supported sag mill {{v}} Limestone Sand Making Machine in Chongqing, China. Limestone Sand Making Machine in Chongqing, China. Capacity: 120 T/H.
synchronous motor for mill drive advantages
Advantages of SER drives for SAG mills GoHz Dec 19 2014 · So at say 85 speed 15 of the motor rated power is returned from the rotor to the supply At a hyper synchronous speed the SER drive feeds power into the motor rotor allowing it to run faster than synchronous speed So for a fixed torque and higher speed the power obtained from the motor is higher than the motor …
Used Sag Mill for sale. Hardinge equipment & more | Machinio
26 x 14 ft (7.9 x 4.2 m) SAG Mill 6,300 HP (4700 kW) Motor. 26 x 14 ft (7.9 x 4.2 m) SAG Mill 6,300 HP (4700 kW) Motor Variable speed drive available at extra cost. Mill includes: - main drive motor Slip Ring 6,300 HP - liquid resistance starter, includes variable speed d...
Gearless mill drives - Grinding | ABB
Gearless mill drive system (GMD) Go gearless to meet your business objetives by exceeding standard availability targets in your grinding operations. ABB's GMD is the most powerful mill drive system in the market to power semiautogenous …
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 …
jaw crusher how it operates | worldcrushers
SAG mill grinding process – Gearless mill drives systems … Slip Energy Recovery Drives. These drive systems use slip ring motors and are started similarly using starting resistors, thereby limiting the inrush current. Crusher Mills, Cone Crusher, Jaw Crushers – Heavy Industry ...
Issue 3| 2014 MineralsFocus
tems consists of 20 slip-ring motors for the main drives, 12 gearboxes, 33 ... Two 38 ft SAG mills each with a 20 MW Gearless Mill Drive Sinamics drive control ... Siemens consists of two ring motors, wrapped around the mill, with a power output of 20 MW each and the new
Competency - Mark Elektriks
Stall Torque motors with brake for cable reeling drums (Sq. cage and slip ring type) : 1990's Special motors for Nuclear reactor : 2000 Gearless Elevator motors : 2010
Benefits of continuous data acquisition from critical ...
Figure 4: Two SAG Mills 24MW each and Two Ball Mills 16.4 MW each with Gearless Mill Drives For larger applications the well-proven Gearless Mill Drive (GMD) technology has shown to be very effective since its introduction in mining in 1980; currently in operation for horizontal mills up to 40 feet (~12.2m) diameter with power ratings up to 28 ...
Starter of SAG Mills with rotor resistance
wound rotor motor is not the best option for SAG mills becuse the slip rings always are a problem even with liquid resistors.Best option is synchronuos motor in combination with variable frequency drive.However if you already have the wound rotor motor the ERS operation is simple.
Low, High Voltage Slip Ring, Squirrel Cage Motors
JR slip ring motor for ball mill JR ball mill motor adopts rotor string resistance full-voltage start-up, which has the advantages of small starting current, large starting torque, high efficiency, low noise, low vibration, good ventilation performance, …
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
TMdrive -10SPR Product Application Guide
Application 2. Slip Power Recovery Drive System for a grinding mill SAG Mill and Motor The Best Solution: TMdrive-10SPR for each pump • The SPR drive carrying slip power is much smaller and less expensive than an MV drive carrying all the …
SIMINE Gearless mill drives
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. Vibration-free, low-weight, short-circuit- proof design with high stiffness
oyu tolgoi sag mills
Two 38 ft SAG mills each with a 20 MW Gearless Mill Drive Sinamics drive control and an H compact PLUS motor from Siemens Oyu Tolgoi commissioning . Fluor Mining History text only ... Jun 17 2012 Boltprep Gearless Sag mill running after bolt elongation checks carried out .
Electrolytic starter (LRS) for high power slipring motors ...
Why using a starter for slip ring motors. In order to start a slip ring motor, the accelerating torque has to be sufficiently higher than the resisting torque. Higher is the inertia, higher has to be the accelerating torque, otherwise the start will be very long and the motor can be damaged by the heating. If the motor is started directly ...
Handbook of Electric Machines - Infineon Technologies
ends by means of the end-rings. In the slip-ring rotor the three-phase rotor windings are not short-circuited, but accessible through the slip-rings. External resistors can be connected to the rotor circuit, which improves the self-starting performance of the motor fed from three-phase grid with fixed frequency (see also Figure 7).
Electric Motors From Electric Motor Warehouse
Air Compressor Motors. Ametek Lamb Vacuum Motors. Ametek Power Nozzle. Bison Gear Motors. C Frame Vent Fan Motors. Carbonator Pumps & Motors. Dayton 3.3" Diameter Motors. Dayton 4.4" Electric Motors. Dayton AC/DC 115V Motors.
[ motor power to drive ball mill ]
10,000 tpd gold plant wsag ball mills, gyratory cone crushers, rock breakers more, unused 36 x 23 ag mill w1500 kw motor and 22 x 41 regrind ball mill 13,405 hp total power, unused mp1000 cone crusher, unused fl 40 x 25 gearless …
Gearless motor drive scheme. | Download Scientific Diagram
In twin motor drive systems, the slip-ring Induction motors are often preferred to synchronous motors due to their inherent ability to minimize unbalanced loading between the two motors [4 ...
ABB motors for the cement industry
ABB slip-ring motors offer more torque for heavy-duty mining and cement applications. Video. ABB Ability™ Smart Sensor condition monitoring solution. ... Go Gearless Gearless Mill Drives (English - pdf - Brochure) Certified Mining Motors (English - pdf - Brochure)
Advantages of SER drives for SAG mills | GoHz
For large mills requiring variable speed, the wound rotor motor and SER drive are economical for a total rating of approximately 2MW to 16MW. Above 16MW, the gearless drive (cyclo-converter) is typically used because gearboxes and …
Menzel wins Canadian mill motor order
Menzel wins Canadian mill motor order. 15 November 2021. Menzel Elektromotoren has adapted and delivered a 6500kW slip ring motor for a Canadian cement mill at short notice. The MEBSSL-type motor is ideally suited for industrial applications with high starting torques. Menzel adapted the internal motor winding connections for a 60Hz mains ...