sag mill gearless drive

Gearless Mill Drive systems for copper mine in Zambia

FQM has opted for Siemens Gearless Mill Drives to be used in the two SAG mills having a diameter of 40 feet and an output of 28 MW and the two ball mills with a diameter of 28 feet and an output of 22 MW With these mill drive systems there is no wear in the drive train since all forces are transferred touch-free via a magnetic field...

ABB gearless mill drives

Feb 21 2019 0183 32 https //newabb/mining/grinding/gearless-mill-drives ABB ensures maximum throughput highest availability and peak performance throughout the life cycl...

A Mechatronic Solution Design and Experience with Large

of large gearless cycloconverter drive sys-tems for SAG-Mills has become more and more common in the recent years Very high power ratings with excellent dynamic performance and high efficiency over a wide speed range allow advanced optimi-zation of the process The design of such large mill drive systems requires modern...

selection criteria for sag mill drive system

Table 1 SAG mill drive systems used on the same size grinding mill Cupitul cost fixed speed ac synchronous drive In calculating the NPC the capital complete with ring and pinion gears cost in US dollars for each SAG mill variable speed dc drive complete system was determined Although the with ring and pinion gears ringmotor gearless drive...

Gearless Drives for Ore Conveying and Grinding

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 107 to...

gearless mill drives Archives

The 12 billion expansion which saw throughput rise from 60 000 t/d to 120 000 t/d involved the addition of two new thyssenkrupp-made ball mills with ABB providing the gearless mill drives GMD technology This came on top of the 33 mills the miner already had up and running as part of the existing 60 000 t/d plant at the operation...

Gearless Ag Sag Mill Machine at Best Price in Kolkata

Buy low price Gearless Ag Sag Mill Machine in PARK STREET Kolkata Gearless Ag Sag Mill Machine offered by MINERALS INDIA PRIVATE LIMITED is...

SAG MILLING

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 135-MW gearless mill drive at St Iv...

ABB to supply gearless mill drive to mine in Chile

February 28 2011 - ABB was awarded an over 47 million contract from Codelco for the delivery of three gearless mill drive GMD systems gas-insulated switchgears GIS E-house and power transformers for the Ministro Hales MH project at 6 Kms north from Calama Chile The MH project brings the number of GMD orders for ABB to 100 units...

Gearless Warp Around SAG Mill

For almost a decade now very good operating experiences have been gained with a total of 28 gearless ring motor drives in the cement industry driving tube mills with diameters of 25 to 4 meters with drive powers ranging from 3000 to about 5000kW Why then did the mineral ore processing industry hesitate till 1980 to adopt this successful concept for their undisputably similar application on...

The Siemens 42ft gearless mill drive still an

next size Gearless Mill Drive ie a 42ft mill It is a dual design approach considering on the one hand the experi-ences Siemens made with Gearless Mill Drive GMD instal-lations over the past 40 years and on the other hand using computerized design tools calculating the system behavior where experience does not yet exist...

Commissioning Variable Speed SAG Mill Gearless Drive

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...

Gearless Mill Drives Beneficiation Bulgaria

The Siemens 42-ft Gearless Mill Drive still an evolutionary design approach SAG Conf 2015 Optimization of the drive system for a cyclone feed pump SME 2015 Increasing availability through advanced Gearless Drive Technology CMP 2014 Design and dynamic behavior of large ring motors for grinding mills SMMH 2012...

sag mill drive arrangement canada

Gearless mill drivesGrinding ABB ABB s Gearless mill drive system is the most powerful mill drive system in the market to power semiautogenous SAG ball and autogenous AG mills Our GMD eliminates all mechanical components of a conventional mill drive Get Price Ten Tips for Proper Motor Selection Electrical...

geared vs gearless drive solutions for grinding mills

Ring gear drives huge grinding mill machine design following the sag mill will be two hp ball mills each one ft in diam and a ring gear drive offers several benefits such as simplicity low cost and ease of and a ring motor gearless drive either of which wraps around the mill...

inching drive for sag mill

Twiflex modular braking system ensures safety and reliability on sag Aug 4 2011 So for the 22MW SAG mill zenith turned to Twiflex Twiflex has been supplying brake systems for gearless SAG and ball mill drives since 2004 and remote operation for inching and creeping duties through a control panel...

GEARLESS DRIVE FOR CEMENT MILL

A gearless drive for the drum of a cement mill or the like wherein the pole wheel ie 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...

Autogenous and Semi

Single stage SAG Mills are very beneficial in reducing CAPEX for plants with a staged throughput approach When future tonnage is to be increased the SAG Mill can feed downstream ball milling to boost capacity Fuller-Traylor SAG/AG Mills range in size from 43m through 122m in diameter with powers as high as 28 000 kW...

Gearless Warp Around SAG Mill

For almost a decade now very good operating experiences have been gained with a total of 28 gearless ring motor drives in the cement industry driving tube mills with diameters of 25 to 4 meters with drive powers ranging from 3000 to about 5000kW Why then...

gearless drive mills and crushers

Major FL mill order for Russian copper mine includes The sag mills when installed will be the largest in all of asia all drives are gearless motor drives from abb each line will also include an fl cone crusher solution with state of the art digitalisation and control system the first production line will be delivered in and the supply of the subsequent lines will continue throughout...

Twin Drive Sag Mill

Gearless Mill Driv Go gearless to meet your business objetives by exceeding standard availability targets in your grinding operations abbs gmd is the most powerful mill drive system in the market to power semiautogenous sag ball and autogenous ag mills this workhorse for grinding operations combines a robust service...

Gearless mill drives

Gearless mill drives GMDs have been installed on platinum-miner Anglo Platinum s Potgietersrust Platinum PPRust 600 000 t/m concentrator...

Gearless drive systems for belt conveyor and grinding

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...

Current issues on high

use of big mill grinding circu its where large power gearless motor drives w ith cycloconve rters in the range around 20 MW are being applied for semiautogenous SAG mills and re-...

PDF Technical Evaluation and Practical Experience of

Voltage waveform at the rectifier input side of an 18 000-hp LCI SAG mill drive a Line-to-line bus voltage waveform 11 270-V peak b Average rms value of the associated frequency spectrum...

ABB gearless mill drive system to power SAG mill

Newmont Mining Corporation selects ABB to design three gearless mill drive systems for their new high-altitude copper gold project in Pe September 1 2010 - ABB won an order from Newmont Mining Corporation to engineer three gearless mill drive GMD systems to be installed at the Yanacocha Minas Conga oxide copper gold project in Pe...

Advantages of SER drives for SAG mills GoHz

Dec 19 2014 0183 32 For large mills requiring variable speed the wound rotor motor and SER drive are economical for a total rating of approximately 2MW to 16MW Above 16MW the gearless drive cyclo-converter is typically used because gearboxes and pinion gears reach their present limit in size...

Gearless Mill Drive Protection Improvements and Its

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 basic technical data of the installed driv TABLE I MILLS AND THEIR DRIVES IN THE LAGUNA SECA PLANT Equipment Drive Comments SAG Mill Semi-autogenous Grinding Quantity 1 unit...

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