Gearless mill drives are becoming the drive system of choice on large AG, SAG and ball mill installations for new ... Synchronous motors have a high inrush starting current400 to 600 of nominal current. The starting torque depends on the motor design and cant be adjusted later on.
ABB reported that it held the most recent of its Gearless Mill Drive GMD User Meetings in Lima, Peru, during October 2324. The conference, a cooperative event between ABB Switzerland and ABB Peru, was the fourth meeting of its type, following a global event held in Switzerland in 2007 and after two regional events in Santiago de Chile and ...
Sep 13, 2006 Simine Mill GD provides a gearless drive with no mechanical parts between the motor and the mill. Stepless adjustment of the rotational speed aids optimum start-up and means that the system can be controlled in accordance with the varying demands of the material in the mill. This reduces wear, maintenance and energy consumption.
ABB was recently contracted to supply gearless mill drive GMD systems for two 38 foot semiautogenous grinding SAG mills at the Serra Azul iron ore mine in Brazil. The Serra Azul mine unit, owned by MMX Minera o e Met licos, an EBX Group company, is located in the iron quadrangle of Minas Gerais, next to Belo Horizonte the heart of ...
Jun 30, 2014 ABBs delivery included one gearless mill drive system GMD for a 40-feet semi-autogenous mill and two low-speed dual pinion ring-geared mill drive
ABB recently won an order worth 44 million US to deliver three gearless mill drive systems GMDs for a new copper mine to be operated by Kazakhmys PLC Kazakhmys in southeastern Kazakhstan. The contract was awarded in the first quarter of 2012. Kazakhmys is the largest copper producer in Kazakhstan and one of the top copper producers in the ...
Gearless mill drive order 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.
Ringmotor of the Gearless Mill Drive GMD System. CYCLOCONVERTER Principle The Cycloconverter is a frequency changer which converts a poly-phase voltage with the frequency f1 into a single or poly-phase voltage with a different, lower frequency f2. On Gearless Mill Drives GMD, the operational output frequency varies from 0.3 Hz up to about 6 Hz.
Our 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.
The outdoor version of the SIMINE Gearless Mill Drives has been successfully in operation since 1998. The design of the outdoor version takes into account the tough ambi-ent conditions as well as the absorption of solar radiation. The sealing system of the SIMINE Gearless Mill Drives is a proven design incorporating extremely low mainte-
Gearless mill drives. Longer service intervals thanks to low-wear drive processes SIMINE Gearless mill drives rpms can be tailored to your operations at any time, and are infinitely variable and uncomplicated. Whether manually or fully automatic rpms can be adjusted to account for the proper-ties of the ore, resulting in significantly less
Commissioning and start-up of Canadas first gearless mill drive GMD system has been completed at Osisko Mining Corps Malarctic project and will increase production capacity at the mine. The system was commissioned by ABB, a leading power and automation technology group. The GMD powers a 38 SAG mill at the Canadian Malartic gold mine.
May 26, 2011 Commissioning and start-up of Canadas first gearless mill drive GMD system has been completed at Osisko Mining Corps Malarctic project and will
Oct 29, 2019 Two 28 MW gearless mill drive systems GMDS are operating in the mines 12-metre SAG mills and four 16.5 MW GMDS are employed in 26 ball mills along with associated control systems. Gearless mill drives are the workhorses for grinding operations which are at the heart of any mine.
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 Codelcos Mina Ministro ...
Meanwhile, Siemens Industry Solutions Division reported it had received an order from Compa ia Minera Antamina S.A. to supply gearless drive systems for a SAG mill and ball mill at the Antamina open-pit in Peru. Siemens said the award is worth approximately 20 million 26.1 million and is scheduled for completion in late 2010.
That is why the gearless drive of a grinding mill is one of the most crucial pieces of equipment in the concentrator and why it is subject to particularly high demands. Siemens has provided about 80 SIMINE Gearless mill drives to the mining industry since 1980. In these thirty-plus years, SIMINE Gearless mill drives have accumulated a combined ...
ABB is buying Alstoms ring motor business to enhance its gearless mill drive GMD activities. The business, based in Bilbao, Spain, has about 120 employees and achieved a turnover of 57m in 201213.
Home Crusher and Mill how to align ball mill pinion to drive motor Shanghai bailing can provide ball mill the start button to start the motor pay attention to current chang Ball mill hollow shaft spherical bush ABB Gearless Mill Drives Motors amp Drives
Starting a 6kV 3Ph 2,200 kW 1,000 rpm slip-ring . 19-2-2017 - D marrage dun moteur 6kV 3Ph 50Hz 2200kW 1000 tmin de moulin boules pour ciment. Starting a 6kV 3Ph 50Hz 2,200kW 1,000rpm slip-ring motor for a cement ball mill.0055. Auteur Yves Mamin ball mill start degroenejagercatering. Ball Mill Start Up Procedure . Ball Mill Wikipedia.
When mill power is between 18 and 20 MW which is the current manufacturing limit of ring geared mills 2 either a gearless mill drive GMD or a ring geared mill with dual pinion motors can be chosen. Selecting between gearless or ring geared design is mostly dependent on size of the mill and power and speed requirements 3 .
Gearless mill drives library.e.abb . 2 GEARLESS MILL DES The gearless mill drive eliminates ringgear, 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. Get price
Abb Successfully Commissions Largest Gearless Mill. Abbs delivery included one gearless mill drive system gmd for a 40-feet semi-autogenous mill and two low-speed dual pinion ring-geared mill drive systems rmds for two 26-feet ball mills making mount milligans grinding circuit one of the most advanced and powerful in north america.
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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 pinions. What used to
Soft-starting Smoothly starts the mill without mechanical shocks and limits the current drawn from the network, avoiding unexpected downtime due to voltage unbalances. Frozen charge remover Avoids human contact with the mill and speeds up the re-start of the system after the frozen charge is detected.
Geared mills typically are power limited to approximately 9000 horsepower per pinion or 18,000 horsepower for a dual-pinion driven mill. Gearless mills, also called Ring Motor mills are employed when a mine operator desires a mill of greater than 18,000 horsepower, or in such cases, where the economics benefits justify the use of a Gearless ...
Several types of ball mill drives can be furnished, made up of various combinations of gearing, motors and transmission equipment. The correct combination to be selected takes into consideration power requirements, gear ratings, floor space, interference from other plant equipment and motor characteristics. The main types are described and illustrated on these pages. Motors considered are