company Siemens supplies a 22 MW gearless drive for a 40 foot SAG mill and two 16 4 MW gearless drives for two 26 foot ball mills Thanks to this development
See MoreStep 1 Mill overload power SAG mill use a Tent Diagram to identify the design requirements Example SG 4 0 38 39 Ø × 19 39 EGL SAG Requires 21 5 MW Step 3 Which Type Three commonly used mill motor types – Gearless drives largest size up to 28 MW highest efficiency – Synchronous with pinion
See MoreUsing Fuller Traylor HOLDTRADE can provide customers with SAG AG mills ranging in size from 18 39 through 40 39 in diameter with powers as high as 30 000 hp These mills feature hydrostatic lubrication and can accommodate either a geared or gearless drive arrangement and are typically grate discharge and use metal nbsp
See Morepower circuit of a typical drive for high power SAG mill The synchronous machine has two three phase windings Gearless Drive and the cycloconverter must be designed
See Morethe determination of mill power requirements and mill sizing including large mills with gearless drives We can offer our clients a range of comminution services SAG HPGR stage crushing scoping prefeasibility and feasibility studies basic and detailed design construction support commissioning assistance
See MoreDescription UNUSED 36 39 x 20 5 39 10 9m x 6 2m SAG Mill 15 000 kW 20 107 HP Gearless Motor Drive 50 Hz Category Ball Mills Quantity 1 Condition Unused Price P O R Reference 6C GAB02 Location USA Belgium and Turkey Email Inquire Directly Website A M King Industries Inc
See Moreestimate to use in the case of gearless drives would be 3 4 ie the estimated power at shell would be about 3 4 lower than the gross Ball Mill AG SAG Mill min max min max DESIGN DATA diameter inside shell m 0 9 7 9 1 8 12 2 belly length inside liners m 1 5 12 2 0 5 9 6 liner thickness mm 51 152 51 152
See MoreABB gearless mill drives GMD YouTube ABB s GMD is the most powerful mill drive system in the market to power SAG ball and autogenous AG mills This workhorse
See Moreaccomplished by primary crushing SAG milling and pebble crushing followed by ball milling The concentrator is a single line configuration comprising of one 40 ft diameter × 22 ft long EGL SAG mill driven by a 24 000 kW gearless drive The SAG mill feeds two ball mills each 26 ft in diameter × 40 ft
See MoreGearless Mill Drive Retrofit – Civil works for SAG mill completed in mid 2004 – Civil Woks amp Motor Mill Installation took place in 3rd amp 4th quarter 2004
See More26 Jun 2009 Gearless mill drives GMDs have been installed on platinum miner Anglo Platinum 39 s Potgietersrust Platinum PPRust 600 000 t m concentrator GMDs are used on the larger ball and semi autogenous grinding SAG mills where power transfer through the con ventional gearbox pinion and girth gear nbsp
See MoreABB 39 s Gearless mill drive system is the most powerful mill drive system in the market to power semiautogenous SAG ball and autogenous AG mills
See MoreAn electrical impact study between variable speed dual pinion mills and gearless mill drives Abstract Conventional mining process circuits use both Semi Autogenous Grinding SAG and Ball mills It is very common that the SAG mills are operated with adjustable frequency drives AFDs and the Ball mills are operated at nbsp
See MoreGearless 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 31 GMDs have been ordered from Siemens and ABB for example over the past year or so for mills ranging up to 40 ft in diameter and with drive power ratings up to nbsp
See MoreIn 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
See MoreOPERATION OF HIGH POWER CCV FED GEARLESS DRIVES UNDER ABNORMAL CONDITIONS 815 Fig 2 Power circuit of synchronous motor with two stator windings that are fed by a 12 pulse CCV TABLE I PARAMETERS OF A TYPICAL SYNCHRONOUS MOTOR FOR A SAG MILL APPLICATION Fig 3 Waveform nbsp
See MoreSmartMill combines a variable speed drive system with advanced process SAG and ball mills powered by either ring geared mill drives RMD or gearless mill
See MoreWhether SAG or Ball Mill space is a sensitive subject especially in the con centrator That 39 s why we always design our SIMINECIS MILL Gearless Drives to combine maximum performance with limited space requirements Low motor weight Since our solutions have a low motor weight this noticeably reduces the demands nbsp
See MoreSiemens has modernized a gearless grinding mill drive Modernization Down Under Siemens Upgrades Gearless Grinding Siemens has now fitted the SAG mill
See MoreToday a single grinding line with a Gearless SAG mill and appropriate the best solution is the gearless mill Very high drive Gearless AG SAG
See MoreSAG mill breakdowns are costly events for producers finally began full replacement of the motor stator on the 21 MW gearless drive for the 40 ft diameter mill
See MoreProcessing plant equipment includes □ Gyratory crusher 1 600 mm by 2 900 mm from Fuller Traylor □ 12 2 m diameter SAG mill with 28 MW gearless drive ABB □ Two 8 5 meter diameter Ball mills each with 22 MW gearless drive ABB □ High pressure grinding rolls for SAG pebble recycle
See MoreUNUSED 36 39 x 20 5 39 10 9m x 6 2m SAG Mill 20 107 HP 15 000 kW Gearless Motor Drive 50 Hz middot UNUSED 36 39 x 23 39 11m x 7m AG Mill with G E Inventory ID 6C AI01 nbsp
See MoreABB 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 nbsp
See MoreSiemens has modernized a gearless grinding mill drive Modernization down under Siemens upgrades gearless grinding Siemens has now fitted the SAG mill
See MoreDaily Great Lakes and Seaway Shipping News Archive new stories and photos from August 2007
See MoreWith the proven use of gearless drive technology the limitation of AG SAG mill size due to gearing constraints has been eliminated is the world 39 s leading supplier of gearless AG SAG mills
See MoreSAG is an acronym for Semi Autogenous Grinding SAG mills are essentially autogenous mills but utilize grinding balls to aid in grinding like in a ball mill
See More26 May 2011 Commissioning and start up of Canada 39 s first gearless mill drive GMD system has been completed at Osisko Mining Corp 39 s Malarctic project and will increase ABB commissions first gearless mill drives project in Canada The GMD powers a 38′ SAG mill at the Canadian Malartic gold mine
See Moredate in Australia The Fimiston 10 97 m 36 ft SAG mill uses twin wound rotor gearbox pinion drives with variable speed achieved through CCV systems 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
See MoreGearless mill drives Go gearless The gearless mill drive eliminates all – 28 MW GMD for a 40 SAG mill
See Moremethod of driving SAG mills Ball mills and other rotating elements Several thousand grinding mills have been manufactured and have been in operation for the last century The gearless drive came into the minerals industry in 1980 and as per their reference lists Siemens have approximately 60 installations and ABB nbsp
See MoreGearless Drive Mills And Crushers Gear Drive Sag Mill Vs Gearless Drive Sag Mill Henan Gold Ore Crusher Gearless Mill Drive Protection
See MoreKeywords cycloconverter gearless mill drive GMD protection minerals processing grinding I INTRODUCTION To process an average of 120 000 tons day of mineral the Laguna Seca concentrator uses a SAG mill and three ball mills all driven by gearless mill drive GMD systems Table 1 gives an overview of the nbsp
See MoreSAG grinding mill advantages of gearless drives on ball mills Ball mills 8211 gearless drive mills and crushers and mw design of motor drives for ball mills
See MoreThe History Application Testing Procedures Grinding Circuit Design and other details on AG SAG Milling are contained in our AG SAG Mill Bulletin Form 2001 1 Gearless AG SAG Mills Gearless drives ringmotors have been used on tumbling mills for several decades The design features motor rotor elements bolted to nbsp
See MoreThe best solution is the Gearless Mill VERY HIGH DRIVE EFFICIENCY had to be driven by other considerations 36 ft x 17 ft 16 000 HP Gearless SAG Mill
See Moreaspect AG and SAG mills to suit any application across the full size and AG and SAG mills Autogenous and semi autogenous mills are designed for grinding or primary crushed ore and are the most widely used in concentrators globally Ball mills Ball mills are mills exceeding 17 000 kW normally use gearless drives
See MoreThe Siemens Drive Technologies Division has commissioned a gearless belt conveyor system in the Antapaccay copper mine in Peru This is the first large scale
See MoreWhether you 39 re talking about SAG or ball mill space is a sensitive subject especially in the concentrator That 39 s why we always design our SIMINE MILL Gearless Drives to combine maximum performance with limited space requirements Suitable foundation and adequate ground conditions Since our solutions have a low nbsp
See MoreConga GMD 42 feet SAG mill ABB gearless mill drive system will power world s first 42 feet SAG mill
See MoreLike the heart is the most important organ I our body the Grinding Mill is the heart of any mining operation and it 39 s important to the success of the operation that the mill runs efficiently Let me come to your site and understand what you try to achieve and what is standing in your way to reach your goal Let me then have a nbsp
See Morerotating and then falling when the mill has rotated more than 90º According to Vanderbeek 2004 quot The installation of a locked charge protection system is critical for large diameter SAG and ball mills This capability is inherent with the gearless drives Frank 1997 describes the implementation of such a system for nbsp
See MoreOutotec has been awarded a contract to deliver one of the largest grinding mills in the world The contract comprises the design and manufacture of a Ø40 39 x29 39 SAG mill The mill will be driven by a Gearless Motor Drive GMD which at 28 0MW is equal to the largest grinding mill power ever used in the mining industry
See MoreThe comparison of a conventional drive train to a gearless drive for a grinding mill is shown in figure 1 Figure 1 – Top view of SAG mills with alternative drive options left side dual pinion drive including motor gearbox pinion and girth gear right side gearless ring motor Declining ore grades leading to increased material nbsp
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See More1 Oct 2017 Escondida IV PT Freeport Indonesia and others with 11 6 m mills have installed SAG mills of 20 MW Gearless drives wrap around motors are typically used for large mills with mills of 25 MW or larger having been designed Several circuits have single line design capacities exceeding 100 000 TPD
See MoreSINGLE STAGE SAG AG MILLING DESIGN ABSTRACT This puts the application in the realm of a single mill with gearless drive xPower demand of more than 28 MW
See MoreThat is the reason why the gearless drive of a grinding mill is one of the most crucial piece of equipment in the concentrator and why it is subject to particularly high demands High availability and reliability throughout the entire lifecycle are a must while unplanned downtimes need to be minimized by a combination of a nbsp
See MoreGearless Mill Drive 100 LRS 20 MW Variable Speed SAG Mill SAG MILL – VARIABLE TWIN PINION DRIVE GMD WRIM SER SYN SCIM GEARLESS System efficiency 90 2 90 8
See MoreLooking at economy of scale new projects consider the use of big mill grinding circuits where larger power gearless motor drives with cycloconverters in the range around 20 MW are being applied for semiautogenous SAG mills and recently ball mills are also being considered This work addresses some current issues nbsp
See More8 Feb 2011 E amp MJ reported in October 2010 See SAG Mill Gearless Drives Go to South American Projects p 102 ABB Group 39 s Minerals Division had won an order from Newmont Mining Corp to engineer three gearless mill drive GMD systems to be installed at its Yanacocha Minas Conga oxide copper gold project nbsp
See MoreGearless mill drives may be the key to maintaining throughput An SABC circuit consists of a semi autogenous grinding SAG mill ball mill and crusher A ball mill is a slightly The limitation of an RMD system was overcome by ABB when it introduced the first gearless mill drive GMD in 1969 for the cement industry
See MoreA wide selection of SAG MILLS available Call us for more details
See MoreSiemens has modernised a gearless grinding mill drive at Newcrest s Cadia Valley Operations near Orange in New South Wales Australia This is the first time that
See MorePreventing problems taking care of your Brompton When you just purchased a used Brompton Tips tricks amp tinkering A little modification I made to keep water out
See MoreShares 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
See MoreA mill is a device that breaks solid materials into smaller pieces by grinding crushing or cutting Such comminution is an important unit operation in many processes There are many different types of mills and many types of materials processed in them Historically mills were powered by hand e g via a hand crank nbsp
See MoreSolwezi Zambia Siemens supplied Gearless Mill Drives for two SAG Semi Autogenous Grinding mills and two ball mills The two SAG mills form the core of the new Sentinel copper mine located 150 kilometers west of Solwezi in the middle of the savannah The First Quantum Minerals FQM mining company is expecting nbsp
See MoreGearless drive stators can deflect The causes of both the SAG and ball mill drive faults were related to the stiffness of the drive components
See MoreWith the proven use of gearless drive technology the limitation of AG SAG mill size due to gearing constraints has been eliminated is the world s leading
See Moremining banniere2016 a The online monitoring of a large Ball or a SAG Mill provides vital information on the health of the machine More than just protection VibroSystM provides machine efficiency and reliability Legend mining2016 gearless ball mill a mining2015 ball mill with gear drive a mining2016 SAG mill a nbsp
See Moregearless drives for cement plants with a power range In 1996 Freeport ordered the first gearless drive for a 38 foot SAG mill located at the company s
See Morethe SAG mill motor was a problem at start up and for some months thereafter Cadia stated in a letter to Siemens that the availability of the Gearless Drive was 98 5 during that time At the end of 1999 Cadia and Siemens installed the final solution to the problem a strong back on the stator housing designed to stiffen of nbsp
See MoreThat is the reason why the gearless drive of a grinding mill is the most crucial piece of equipment in the concentrator and why it is subject to particularly high demands High availability and reliability throughout the entire lifecycle are a must while unplanned downtimes need to be minimized by a combination of a robust nbsp
See MoreABB s Gearless mill drive system is the most powerful mill drive system in the market to power semiautogenous SAG ball and autogenous AG mills
See MoreRing gear drives huge grinding mill as used at Escondida and a ring motor gearless drive this mill uses a ring motor drive Figure 5 The SAG mill is
See More19 Jan 2016 The mills at Sentinel in Zambia are amongst the world 39 s biggest with 2 off 40 ft SAG mills complete with 28 MW drives and 2 off 28 foot ball mills with 22 MW drives For mines of this size reliable high efficiency mills are top priority Siemens Gearless Mill Drives result in reduced total costs and assure a nbsp
See MoreProject One SAG Mill and 3 Ball Mill Drive Systems Capacity SAG Mill 1000 t h Four complete Gearless Mill Drive Systems including Wrap around Motors
See MoreSiemens is now able to provide to mining companies a gearless drive system for SAG mills with a tube diameter of 42 feet This enables throughput to be almost doubled
See More15 Jun 2014 Our largest mills has been delivered to SINO Site to date are Ø12 2m x 11m 28MW Gearless Drive AG Mills and Ø7 9m x 13 6m 2x8 MW Twin Pinion Drive with the largest mills supplied to date being a Ø7 9m x 13 6m 2x8 5MW Ball Mill and a Ø11m x 5 4m 2x8 5MW SAG Mill being the largest in China
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