ABB announces that it has successfully completed the commissioning of a 13.4 MW gearless mill drive (GMD) system for the Hipogeno project. The GMD powers a 36' SAG (semiautogenous) mill at Carmen de Andacollo copper mine in central Chile. Carmen de Andacollo is an open-pit truck-and-shovel operation at an elevation of 1000 m. 90 % of the ...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 (SAG), ball …

The gearless mill drive business is an important market for ABB. GMD end users from 20 different mines or cement plants, coming from all five continents, as well as major mill suppliers, accepted ABB's invitation and came to Switzerland to share their knowledge, experiences, problems and ideas with representatives from ABB.30 July, 2013. ABB is buying Alstom's 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 2012/13. It will become part of ABB's Process Automation division. The financial details of the deal have not been revealed.

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].Gearless mill drive (GMD) technology has further expanded the use of large SAG milling allowing Outotec to produce the world's largest SAG mill of 42' in diameter drawing power at 28 MW. Today, Outotec is the world leading supplier of gearless SAG mills operating globally.

At the heart of Newmont Gold Co's new refractory ore treatment plant is a 15,000 hp ABB gearless mill drive, the largest such motor in use on a ball mill today. High power ball milling. Kota Karim Container (Gearless) P-Delta -- 04/08/19 23:48 - KPT shipping intelligence report.Drive solutions in the medium and high-voltage range are our business, our profession, and our passion. Become part of our global team. You will design and create drive solutions (mainly medium voltage based), especially for the mining industry for gearless mill drives (GMD)

A gearless drive for the drum of a cement mill or the like wherein the pole wheel, i.e. the rotor of a low-speed electric motor surrounds the drum and is connected to it by a circumferential array of uniformly spaced studs which project radially from the drum and are received in a similar array of uniformly spaced recesses located in the pole wheel structure.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 …

ball mill drive motors . ball mill drive motors Gearless AG/SAG mills zenith is the world s leading supplier of gearless AG/SAG mills steel balls Gearless drives ringmotors have been used on tumbling mills for several decades . Know More. ball mill motor driven .The current paper looks at evaluating the merits of large geared mills versus gearless driven mills by evaluating the following factors: The capability of currently …

Concepts of Gearless Ball-Mill Drives Abstract: ... As the horsepower drive ratings required have increased to several thousand horsepower, and as advances in technologies in terms of the use and application of adjustable frequency power conversion equipment have occurred, the basis for driving the ball mill directly by the driving motor with ...DRA Global has installed over 120 mills, including a 23MW SAG Mill and an 18MW gearless drive mill, both world firsts. Specialist capabilities in the design of mines cater for a wide range of mining methods and commodities. Mining services extend from pit to port; from the inception of brownfields and greenfields projects to the end of the mine ...

Cobre Panama is using six ABB Gearless Mill Drives (GMDs) at its recently commissioned copper concentrator in Panama. Two 28-megawatt (MW) GMDs are operating on the 40-ft SAG mills, and four 16.5-MW GMDs are employed on 26-ft ball mills along with the associated control systems.GMD technology for Minera ndida. ABB gearless mill drive, installed 2002 at the Minera ndida in Chile. ABB announced that it will supply a new 15.7 MW gearless mill drive (GMD) system for a 26 ft ball mill, including transformers, ring motor and a complete electrical room entirely equipped, to Minera ndida/Chile.

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 system are still in service. Today, GMDs are mainly used for SAG mills between 36 and 40 feet (10.7 to …https://new.abb/mining/grinding/gearless-mill-drives | ABB ensures maximum throughput, highest availability and peak performance throughout the life cycl...

The reliability of large diameter, high horsepower ball mill is paramount when large production and minimum downtime is required. The 17 ft. x 56 ft. double compartment ball mill at St. Lawrence Cement Company has the first gearless drive built in North America and has the world's largest hydrodynamic bearings currently built and running.Download scientific diagram | Gearless motor drive scheme. from publication: Technical Evaluation and Practical Experience of High-Power Grinding Mill Drives in Mining Applications | Grinding mill ...

Meanwhile, ABB—which claims to have invented and delivered the first gearless mill drive system in 1969—reported: • That it had, in early 2007, completed a $41-million order for installation and commissioning of four gearless ball mill drive systems at the Cerro Verde mine expansion project in …The gearless mill drive 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.

Gearless mill drive systems are used in the mining industry for processing large quantities of ore to extract metals such as copper, gold, platinum, iron and molybdenum.Presently the gearless drive is more costly than the complete mechanical portion (mill rotating element and accessories supplied by the mill manufacturers) and hence the customer/consultant needs to have two parties to deal with from the start of any project. There is an interface between the mill vendor and the gearless motor supplier.

Two 28 MW gearless mill drive systems (GMDS) are operating in the mine's 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.As a final improve- SAG mill gearless drive," in Proc. Int. Conf. SAG Grinding, Vancouver, BC, Canada, 2001. CD-ROM. ment, the protection scheme has been improved to ensure that [3] H. Akagi, "Large static converters for industry and utility applications," the thyristor will not receive gate pulses when the input voltage Proc. IEEE, vol ...

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 ...to low-wear Drive processes The SIMINE Gearless Mill Drives rpms can be adapted to your operations at any time, and are infinitely variable and uncomplicated. Whether manually or fully automatic – rpms can be adjusted to the properties of the ore, resulting in significantly less wear to the mill lining. The mill's direction of rotation can be

The company selected ABB's 26 MW gearless mill drive system (GMD) for the mine's 40 ft SAG mill, as well as other drives, electrical infrastructure equipment and a long-term service agreement (LTSA). This is expected to reduce operating costs, improve process throughput and reliability while saving energy and keep equipment in top form.March 8, 2011 ABB won a contract from Kinross Gold Corporation for the delivery of three gearless mill drive (GMD) systems to be installed at the Tasiast gold mine. Tasiast is an open-pit operation located in north-western Mauritania, Africa, and is situated approximately 300 kilometers north of the capital Nouakchott.