Jun 16, 2014· Shares of ABB Ltd ( ABB) fell 013% after the company announced on Jun 12 that it has completed the deployment of three gearless mill drive systems (GMDs) for ,
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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
Gearless motors up to 22 MW are in service in many of these ore processing plants Gearless motor drives are also known as “ring motors” or “wrap around motors” The motor consists of a large number of magnets placed circumferentially on the shell of the grinding mill This is similar to the rotor of a conventional motor
Baden, Switzerland, November 13, 2008 – ABB, the leading power and automation technology group, announces that it has held the second global Gearless Mill Drive (GMD) User Meeting
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Gearless Mill Drive Sales Rev Up to Meet Demand - WOMP Gearless mill drives are becoming the drive system of choice on large AG, SAG and ball mill installations for new projects and existing mill expansions At least .
The gearless drive system includes four low-speed synchronous motors (44 MW, 66 rpm) and the associated SINAMICS SL150 converters , The gearless mill drives operate more energy efficiently, having a 5% higher efficiency factor than conventional drive systems Watch video
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 downtime
In ore processing, grinding is an essential step for the overall performance of any mine 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 .
The Gearless Mill Drive (GMD) is potentially the most critical bottleneck in the mine production process Each hour of downtime can result in a heavy financial loss 3 “To improve productivity and reaction times in emergency situations, the mining
Jan 19, 2016· The mills at Sentinel in Zambia are amongst the world’s biggest, with 2 off 40 ft SAG mills complete with 28 MW drives, and 2 off 28 foot-ball mills with 22 MW driv For mines of this size .
Siemens had received the order to supply a Simine Mill GD gearless drive system with an output of 20 megawatts and the Frozen Charge Shaker function in 2006 at-onlineinfo at-onlineinfo
ABB has installed or won orders for over 50 gearless mill drive units in 18 countries on five continents The gearless mill drive business is an important market for ABB and it is crucial to maintain an open and good relationship with the users
insurers view the specific risks related to large Gearless Mill Drive (GMD) mills, and why the insurability of these large mills is a significant concern to the mining industry that utilizes them, the manufacturers that design and construct them, and the insurance companies that provide coverage to the users Introduction to Risk Management
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 increase production capacity at the mine
Since designing its first gearless mill drive in the late 1960s, ABB has accumulated over forty years of experience in optimizing gearless solutions for grinding applications ABB says its GMD “is the most powerful mill drive system on the market”
Mining Magazine - Latest mining and investment news ABB continues drive contract for Cerro Verde six years on In the March quarter of 2012, ABB was contracted to supply gearless mill ,
Table of ContentsGeneral Description of the DriveAssembling and ConstructionComponent CharacteristicsDrive Evaluation The electric operation and design features of the 11,000 HP variable speed SAG mill gearless drive is presented The function of the frequency-converter, control system drive and lubrication systems are described An analysis of the harmonic characteristic in the Supply .
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 Mineração e Metálicos, an EBX Group company, is located in the iron quadrangle of Minas Gerais, next to Belo Horizonte – the heart of .
Newmont Mining has contracted ABB to design three gearless mill drive (GMD) systems for its new Conga, Equipment 08 SEPTEMBER 2010 Siemens mill drives for Caserones mine Minera Lumina Copper has ordered three Simine Mill GD gearless mill drives and associated electrical.
The SAG mill was fitted with a gearless drive with a power rating of 24 MW and the ball mills were also fitted with gearless drive systems, each providing 164 MW Also included in the scope of supply were transformers, E-houses, the drive control, the cooling system, protection equipment and ,
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 direct drive (gearless) wind turbine is the low-speed generator that eliminates the need for a gearbox from the turbine’s drive train These turbines have advantages such as - these are lighter as compared to conventional turbine, these have significantly lower maintenance costs, and it is not needed to replace gearbox as these are gearless turbin
From 13-16102010 ABB held its fourth global Gearless Mill Drive (GMD) User Meeting The conference hosted over 150 participants coming from all five continents and took place in Las Vegas/USA from 13–16102010 (Fig) It was the sixth ABB GMD User Meeting, after three global and two ,
Fig 4 Air gap monitoring system in a gearless drive Gearless Drives for grinding mills Gearless Drives are well proven stateof- the-art technology for large grinding mills Siemens, the company that introduced Gearless Mill Drives (GMD) to mining industry started up its first GMD on a ball mill in Norway in 1980 The mill and its drive .
Nov 08, 2016· ABB Motor Gearless Mill Drive GMD System HOW TO REPAIR VRM GEAR BOX - CHINA MADE (WITH ROOT CAUSE ANALYISIS OF FAILURE) - Duration: 13:37 Subodh Soni 9,284 views
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
SAG Mill Gearless Drives Go to South American Projects October 2010 | Suppliers Report In early September, ABB Group’s Minerals Division announced it had won an order from Newmont Mining Corp to engineer three gearless mill drive (GMD) systems to be installed at the Yanacocha Minas Conga oxide copper-gold project in Pe
For mines of this size, reliable, high efficiency mills are top priority Siemens Gearless Mill Drives result in reduced total costs and assure a high performance, in accordance with the production requirements of a mining operation