As siemens drive technologies division celebrates 500 years of gearless mill drive operation combined total of installations it is delivering the gearless drive technology for two new mills for the toromocho mine in the peruvian province of yauli.The order comes from minera chinalco per, a subsidiary of aluminum corp of china chinalco.
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1, general scheme of a gearless mill motor drive 24.Of the airgap is in the range of 15-17 mm.A tolerance of - 3 mm is consi dered for setting alarm s and protections.
Ieee transactjons on industry applications, vol.3, mayijune 1996 663 15 000-hp gearless ball mill drive in cementwhy not meinhold a.Errath, member, ieee abstruct- over recent years, there has been a clear trend toward.
For the expansion project, which aims to double the mines concentrator milling capacity from 60,000 to 120,000 metric tons per day mtd, abb is supplying two 15-megawatt gearless mill drive systems and two high pressure grinding rolls hpgr with 2 x 2,650-kw drive systems.
A gearless mill drive gmd is a major investment for a plant, and a host of processes are dependent on its reliable performance.This makes its potential downtime one of the biggest risks any mining company faces.Its also one that can be mitigated and controlled through data and insights.
Com gearless mill drives machinery risk solutions practice 2009 matt dugalic p., marsh mrsp risk consultant, vp kurt tischler dipl., siemens product manager, mining.
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 customerconsultant 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.
Abstract a cycloconverter-fed gearless mill drive is a drive system that has hardware and software protection functions to protect the equipment in case of abnormal operating conditions, malfunctions or failures.For demanding applications in the mining industry, protections systems need to be reviewed considering special or abnormal operating conditions as well as the need of high system.
Citeseerx - document details isaac councill, lee giles, pradeep teregowda abstracta cycloconverter-fed gearless mill drive is a drive system that has hardware and software protection functions to protect the equipment in case of abnormal operating conditions, malfunctions or failures.For demanding applications in the mining industry, protections systems need to be reviewed considering.
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.
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 minerao e metlicos, an ebx group company, is located in the iron quadrangle of minas gerais, next to belo horizonte the heart of.
Siemens gearless drive technology of 99.71 - as confirmed by real operational data from the antapaccay mine in peru.It was the first plant worldwide to use gearless drives for both applications.Keywords gearless mill drives, gearless conveyor drives, availability, sag mill, ball mill, overland conveyor, antapaccay 15.
A cycloconverter-fed gearless mill drive is a drive system that has hardware and software protection functions to protect the equipment in case of abnormal operating conditions, malfunctions or.
Viele bersetzte beispielstze mit gearless mill drive deutsch-englisch wrterbuch und suchmaschine fr millionen von deutsch-bersetzungen.
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 10.2 m and ball mills from 24 to 28 feet 7.
Meanwhile, abbwhich claims to have invented and delivered the first gearless mill drive system in 1969reported 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 peru.
Instability in gearless mill drive motors by peter warner, anglo american technical division in 2006 anglo platinum ordered two 26-foot ball mills from ffe minerals vecor and two 17,5 mw gearless mill drives gmds from abb for the 600 kilo tonne per month concentrator for the potgietersrust platinum north expansion project.
In december 2001, gold fields acquired the st.Ives project near kalgoorlie, and only in 2003 did the new owner decide to go ahead with the project and to install the 36-ft sag mill and its 13.5-mw gearless mill drive at st.
Two 28 mw gearless mill drive systems gmds are operating in the companys 40 ft sag mills and four 16.5 mw gmds are employed in 26 football mills along with associated control systems.Gearless mill drives are the workhorses for grinding operations which are at the heart of any mine.The six abb gmds at the world-class panama cobre project.
Abbs gearless mill drive system improves energy efficiency and provides increased process availability at tecks carmen de andacollo copper mine.Baden, switzerland, may 12, 2010 abb, the leading power and automation technology group, announces that it has successfully completed the commissioning of a 13.4 mw gearless mill drive gmd system for the hipogeno project.
Gearless mill drive gmd technology has further expanded the use of large sag milling allowing metso to produce the worlds largest sag mill of 42 in diameter drawing power at 28 mw.Today, metso is the world leading supplier of gearless sag mills operating globally.
The reliability of large diameter, high horsepower ball mill is paramount when large production and minimum downtime is required.Double compartment ball mill at st.Lawrence cement company has the first gearless drive built in north america and has the worlds largest hydrodynamic bearings currently built and running.
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.
Significant energy and cost economies can be achieved with a gearless mill drive working with a ball mill in these upper power ranges.This prospect should also be of interest to the cement industry.The technology is available for an up-sizing of cement grinding installations and the gearless mill drive is a proven, reliable drive.
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 mills direction of rotation can be.