sag mill gearless drive

Table of ContentsGeneral Description of the DriveAssembling and ConstructionComponent CharacteristicsDrive Evaluation The electric operation and design features of the 11000 HP variable speed SAG mill gearless drive is presented The function of the frequencyconverter control system drive and lubrication systems are described An analysis of the harmonic characteristic in the Supply

The company selected ABBs 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 longterm service agreement LTSA This is expected to reduce operating costs improve process throughput and reliability while saving energy and keep equipment in top form

• 28 MW GMD for a 40 SAG mill • 28 MW GMD for 42 SAG mill Whether it is size or an installation at the highest altitude 4600 masl ABB’s GMDs are well positioned to contribute to the building of larger and ever more powerful mills Leading the gearless mill drive evolution The ABB gearless mill drive GMD is the most powerful

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

The gearless drive accelerates the mill slowly to the preselected speed In the Normal Stop procedure the gearless drive reduces the mill speed to zero and stops the mill without oscillation Inching is handled from the local control panel The gearless drive starts the mill at low speed and stops the mill

Mill Builder FFE Minerals USA Mill Size SAG Mill 38 feet1158 m Ball Mills 24 feet732 m Ore processed CopperZinc Drive Rating SAG Mill 201 MW 923 rpm Ball Mills 112 MW 1138 rpm Award of Contract March 1999 Start of Operation June 2001 ABB’s scope of supply Four complete Gearless Mill Drive Systems including Wraparound

Gearless mill drives Grinding ABB ABB’s 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 servicefriendly and fit for purpose design to

SIMINE Gearless mill drives – outstanding reliability for your mine The gearless concept The gearless drive avoids any contact between the rotating mill and the static parts of the motor This allows for continuous workflow without maintenance on the gears

Every mining operation has a unique grinding process Metso has experience of over 8000 grinding mills globally including manufacturing and delivering the largest SAGAG mills in the world Our experts welcome the opportunity to assist you with circuit and circuit control design as well as startup operation and optimization of your mill

With inside dimensions of 36ft diam and 19ft long this semiautogenous grinding mill SAG see next section will use a 43ft diam ringgear drive to transmit 18000 hp and handle up to

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 gearless drive accelerates the mill slowly to the preselected speed In the Normal Stop procedure the gearless drive reduces the mill speed to zero and stops the mill without oscillation Inching is handled from the local control panel The gearless drive starts the mill at low speed and stops the mill

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 36ft SAG mill and its 135MW gearless mill drive at St Ives

The company selected ABBs 26 MW gearless mill drive system GMD for the mines 40 ft SAG mill as well as other drives electrical infrastructure equipment and a longterm service agreement LTSA This is expected to reduce operating costs improve process throughput and reliability while saving energy and keep equipment in top form

Siemens modernises SAG mill gearless drive in Cadia Valley Posted by Matrix on 27th March 2012 Siemens 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 a gearless grinding mill had been equipped with a Sinamics SL150 cycloconverter control

Oct 29 2019 · Two 28 MW gearless mill drive systems GMDS are operating in the mine’s 12metre SAG mills and four 165 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

Cobre Panama is using six ABB Gearless Mill Drives GMDs at its recently commissioned copper concentrator in Panama Two 28megawatt MW GMDs are operating on the 40ft SAG mills and four 165MW GMDs are employed on 26ft ball mills along with the associated control systems

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 FullerTraylor SAGAG Mills range in size from 43m through 122m in diameter with powers as high as 28000 kW

The 12 billion expansion which saw throughput rise from 60000 td to 120000 td involved the addition of two new thyssenkruppmade 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 60000 td plant at the operation

Benefits of continuous data acquisition from critical large drive systems in a mine operation SME 2016 Frozen charge detection and automatic loosening with gearless mill drives SAG Conf 2015 Mill drives the desire for increased power and the associated limits and conditions SAG Conf 2015

With the proven use of gearless drive technology the limitation of AGSAG mill size due to gearing constraints has been eliminated Metso is the worlds leading supplier of gearless AGSAG mills Features The experience gained from installation and operation of these mills enables us to offer mills of up to 35000 installed horsepower or more

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

Meanwhile Siemens’ Industry Solutions Division reported it had received an order from Compañia Minera Antamina SA to supply gearless drive systems for a SAG mill and ball mill at the Antamina openpit in Peru Siemens said the award is worth approximately €20 million 261 million and is scheduled for completion in late 2010

Dec 19 2014 · 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 cycloconverter is typically used because gearboxes and pinion gears reach their present limit in size

Mar 20 2008 · Both the SAG mill as well as the ball mill will be powered by gearless drive systems they will benefit from the world’s most energy efficient drive solution ABB’s gearless mill drive systems are designed and engineered from the bottom up to deliver massive capacity superior energy efficiency unmatched availability and global roundthe

Ring gear drives huge grinding mill Machine Design Following the SAG mill will be two 9000hp ball mills each one 20ft 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

geared vs gearless drive solutions for grinding mills in kuwait World’s largest geared drive – 2x8500kW – Wushan China operating Among the many reasons that geared drives on large SAG mills are not favoured is due to not having an efficient variable speed drive option 60 to 80 critical speed which is required for process reasons

Gearless drive systems for belt conveyor and grinding mills commissioned in Xstrata copper mine in Peru 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 Learn More

Gearless Mill Drive Sales Rev Up to Meet Demand Know More The Los Bronces SAG mill drive is rated at 22 MW and the ball mill drives at 164 Apart from the elimination of a separate inching drive to position the mill for

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

Jun 15 2014 · Our largest mills has been delivered to SINO Site to date are Ø122m x 11m 28MW Gearless Drive AG Mills and Ø79m x 136m 2x8 MW Twin Pinion Drive Ball Mills These mills are scheduled of start up on 2012 80 with the largest mills supplied to date being a Ø79m x 136m 2x85MW Ball Mill and a Ø11m x 54m 2x85MW SAG Mill being the

Inventory ID 6CHM03 UNUSED FLSMIDTH 36’ x 24 Dual Pinion SAG Mill with 2 ABB 9000 kW 12069 HP Motors for Total Power of 18000 kW 24138 HP