sag mill gearless drive

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DRA Global

DRA Global has installed over 120 mills including a 23MW SAG Mill and an 18MW gearless drive mill both world firsts Read More Mining Specialist capabilities in the design of mines cater for a wide range of mining methods and commoditi Mining services extend from pit to port from the inception of brownfields and greenfields projects to...

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...

The operation modes of a grinding mill with gearless drive

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...

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...

TECHNICAL AND COMMERCIAL BENEFITS OF GEARLESS MILL

Gearless mill drives are a well established solution for grinding applications in the minerals and mining industri The paper describes the functionality and technical features of such drive systems as well as their advantages compared to other drive solutions...

Gearless Mill Drives Beneficiation Siemens Global

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...

ABB commissions six gearless mill drives at Cobre Panama

Oct 29 2019 0183 32 The six ABB gearless mill drives which are the most powerful mill drive systems on the market for semi-autogenous SAG ball and autogenous...

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 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 Drive systems GMDs Services

SAG Mill 26 Gearless Mill Drive systems GMDs 43 Medium Term Financing Facilities 5 Crushing Plant 19 Copper Concentrator 6 Equipment Maintenance Service 1 Power Transmission Line 19 Seawater Reverse Osmosis SWRO 2 Civil structural and mechanical frameworks 39 Pulley Assemblies 10 Environmental Impact Assessment EIA 149 Ball...

Mill drive selection for semiautogenous grinding mills

mill and gearless mill with a ringmo-tor are shown in Figs 1 and 2 Early SAG mill designs using gear drives were limited in the amount of power that could be applied to the pin-ions 37 MPa 5000 hp The exception to this design was the Hibbing taconite operation It used two447 MPa 6000 hp motors to drive a 1I-m-diam x 45-m long 36-ft...

Lubrication System Of A Sag Mill

Gearless mill drives are becoming the drive system of choice on large AG SAG and of hydraulic and lubrication systems for the mill bearings braking and operator The SAG mill is the third 40-ft unit to be driven by a Siemens system the...

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 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 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...

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...

TECHNICAL AND COMMERCIAL BENEFITS OF GEARLESS MILL

The Gearless Mill Drive the Work Horse for SAG and Ball Mills R Errath Errath R 2006 The Gearless Mill Drive the Work Horse for SAG and Ball Mills SME Conference St Louis...

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...

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...

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...

gearless ball mill drive Prominer Shanghai Mining

Gearless mill drives - Grinding 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...

german technology sag mill

Increasing availability through advanced Gearless Drive The SAG mill has a 40 ft inner diameter ID an effective grinding length EGL of 25 ft and a rated power of 24 000 kW The two 2 ball mills have an ID of 26 ft an EGL of 405 ft and a rated power of 16 400 kW figure 7 Figure 7Both Antapaccay Ball Mills with Gearless Drives of 16...

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...

GEARLESS DRIVE

Nov 07 2007 0183 32 The ABB order includes a complete 19-MW gearless mill drive system for a 115-metre SAG mill The contract includes engineering and delivery which is scheduled for the end of 2008 The system will include a ring motor transformer housings and...

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