sag mill gearless drive
Gearless mill drive (GMD) and digital services for Kinross ...
Gearless mill drive (GMD) and digital services help increase production by 50% at Kinross Tasiast mine Advanced grinding technology with GMD system health checks, on-demand remote support and condition monitoring unlock real value at African gold mine First published in the February 2019 issue of Global Mining Review
SAG Mill | Autogenous and Semi-Autogenous Mills | FL
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 4.3m through 12.2m in diameter with powers as high as 28,000 kW.
Mill drives: the desire for increased power and the ...
Matching Mill Drive Description to Mill Requirements Once the power level for the primary (SAG) mill has been set, i.e., design tonnes per hour (tph) x design E ... (expressed as mill speed in the case of gearless mill drives, (GMDs), and shell liner/lifter wear so that the ex- ... SAG mill is rated at 29 MW and 78% C.S., with a 42 ft dia.
Gearless Mill Drives - ABB
Antamina Compania Minera Antamina S.A. Peru Project: One SAG Mill and 3 Ball Mill Drive Systems Capacity: SAG Mill 1000 t/h Ball Mills 1000 t/h Consultant: Bechtel, USA Mill Builder: FFE Minerals, USA Mill Size: SAG Mill 38 feet/11,58 m Ball Mills 24 feet/7,32 m Ore processed: Copper/Zinc Drive Rating: SAG Mill 20,1 MW, 9,23 rpm Ball Mills 11,2 MW, 11,38 rpm
Six Gearless Drives Turn Mills at Cobre Panama | E & MJ
Cobre Panama is using six ABB Gearless Mill Drives (GMDs) at its recently commissioned copper concentrator in Panama. Two 28-megawatt (MW) GMDs are operating on the 40-ft SAG mills, and four 16.5-MW GMDs are employed on 26-ft …
ball mills gearless
SAG mills . Gearless mill drive GMD technology has further expanded the use of large SAG milling allowing to produce the worlds largest SAG mill of 42' in diameter drawing power at 28 MW Today is the world leading supplier of …
Gearless mill drives - ABB
• 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 m.a.s.l.), 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 ...
Gearless Drives for Ore Conveying and Grinding - Cmms ...
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 (10.7 to 12.2 m) and ball mills from 24 to 28 feet (7.3 to 8.5 m).
SAG Mill Components - Mineral Processing & Metallurgy
SAG Mill Components. SAG Mill Components. ... Another solution is to use the so-called "gearless drive." A cyclo-converter reduces the power frequency and a synchronous motor is either wrapped around shell or mounted on a trunnion extension. ... of the main attractions in the first application of this type of drive to either an autogenous ...
Updates on geared vs gearless drive solutions for grinding ...
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.
Siemens expands mining portfolio to include gearless drive ...
38-foot SAG mill with gearless drive system from Siemens. Throughput can be almost doubled with a 42-foot mill. The 42-foot ring motor is the centerpiece of the gearless drive and wrapped around the tube mill. An increase in tube diameter means that the mass of the ore being ground rises dramatically, and hence also the strain on structural ...
SAG Milling in Australia -Revised Submission
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. However, pinion systems to 8 MW per pinion and dual motor systems with quadruple pinions extend the range of gear driven mills to a theoretical limit of 32 MW. The Ernest Henry SAG mill
Solidworks SAG Mill Gearless | Construction part#01 - YouTube
Build3Design - Arte en la ingeniería mecánica:Hola colegas en la ingeniería, en esta ocasión les traigo la descripción del proceso constructivo de un Molino ...
gearless mill drives Archives - International Mining
The $1.2 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.
Major FL mill order for Russian copper mine includes ...
Each of the four lines will consist of a single 40 ft SAG mill with a 28 MW drive and two 28 ft ball mills, each with a 22 MW drive. The SAG mills when installed will be the largest in all of Asia. All drives are Gearless Motor …
Current issues on high-power cycloconverter - Fed gearless ...
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-
ABB Library - Gearless Mill Drives
Paper held at SAG Conference 2011 - By S. Gaulocher (ABB), K.S. Stadler (ABB), Th. von Hoff (ABB), R. Veldsman (ABB), A. Fuerst (ABB) and J. Koponen (ABB): Gearless mill drives (GMDs) are the workhorse in the mineral processing industries, more specifically when it comes to grinding crushed ore and cement (in various production stages) in semiautogenous (SAG) …
Preprint 13-050
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 customer/consultant 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.
Literature Review: Gearless Motor Failures – A Mill ...
Remedial design of the world's largest SAG mill gearless drive. In Proceedings of the SAG 2001 Conference, Vancouver, Canada. [8] Frank, W-D., Gearless drives – Experiences and new/future developments. In Proceedings of the SAG 1996 Conference, Vancouver, Canada. [9] Orser, T., Svalbonas V., Van de Vijfeijken, M., 2011. Conga: the …
technical specifications sag mill
Gearless mill drive GMD technology has further expanded the use of large AG SAG milling allowing to produce the world 39 s largest SAG mill of 42 39 in sag mill datasheet AG mills – Ideal for finely grinding competent ores
DRA Global
DRA Global has installed over 120 mills, including a 23MW SAG Mill and an 18MW gearless drive mill, both world firsts. Specialist capabilities in the design of mines cater for a wide range of mining methods and commodities. Mining services extend from pit to port; from the inception of brownfields and greenfields projects to the end of the mine ...
Update On JHEP SAG Mill Drive Selection | PDF | Gear ...
gearless Additional considerations in selection of JHEP SAG mill drive Concrete madness - foundations of SAG Mill gearless drive A gearless drive will require about 250% more concrete and more importantly more reinforcing steel in the foundations than the equivalent dual pinion drive = $$$$$ This picture shows only what is above the ground.
Superintendent, Mill Maintenance job with Thompson Creek ...
Specific areas of responsibility include but not be limited to, maintenance of the primary gyratory crusher, connecting conveyor belts, secondary pebble crushers, a 40' gearless motor drive SAG Mill, two Ball mills, all equipment in the concentrator, and downstream to …
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.
Used Sag-mills For Sale
UNUSED FL 40' x 25' (12,192mm x 7,620 mm) Gearless SAG Mill. Inventory ID: 6C-135. UNUSED FL 40' x 25' (12,192mm x 7,620 mm) Gearless SAG Mill. Manufacturer: FL . Inventory ID: 6C-135. View Details. HP. 34866. KW.
SAG Mill Variable Speed Drive - 911 Metallurgist
The drive enables the mill to run on the utility at fixed speed for optimum efficiency or in the event of malfunction of the LCI. Drive Reliability. The gearless drive is probably the most reliable of all drive options mentioned herein. Elimination of gears and motor bearings remove these items from the list of potential problem areas.
Gearless mill drive (GMD) and digital services for Kinross ...
The company selected ABB's 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 long-term service agreement (LTSA). This is expected to reduce operating costs, improve process throughput and reliability while saving energy and keep equipment in top form.
molinos sag gearless
Gearless AG SAG mills trituradora . With the proven use of gearless drive technology the limitation of AG SAG mill size due to gearing constraints has been eliminated trituradora is the world 39 s leading
Outotec presents the world's largest SAG mill - Mineral ...
The mill will be driven by a Gearless Motor Drive (GMD) which at 28.0 MW is equal to the largest grinding mill power ever used in the mining industry. The SAG mill design is based on Outotec's proprietary grinding mill technology, developed over decades for maximum reliability and performance.
Gearless autogenous semi autogenousmills by Perumin ...
The 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 36 ft. x 17 ...
SAG mills (semi-autogenous grinding mills) - Outotec
Gearless mill drive (GMD) technology has further expanded the use of large SAG milling allowing Outotec to produce the world's largest SAG mill of 42' in diameter drawing power at 28 MW. Today, Outotec is the world leading supplier 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 Peru. 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 Peru.
GRINDING: ABB commissions six gearless mill drives at ...
Two 28 MW gearless mill drive systems (GMDS) are operating in the mine's 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.
Gearless Mill Drives | Beneficiation | Siemens Global
SIMINE Gearless mill drives A standard of reliability and efficiency for grinding From Norway to Zambia, from Mongolia to Chile – for over 30 years, mining operators all over the world have been counting on SIMINE Gearless mill drives. Their most important features include a small footprint and less weight than conventional drives.
Advantages of SER drives for SAG mills | GoHz
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 …
(PDF) Operation of High-Power Cycloconverter-Fed Gearless ...
As a final improve- SAG mill gearless drive," in Proc. Int. Conf. SAG Grinding, Vancouver, BC, Canada, 2001. CD-ROM. ment, the protection scheme has been improved to ensure that [3] H. Akagi, "Large static converters for industry and utility applications," the thyristor will not receive gate pulses when the input voltage Proc. IEEE, vol ...
Ring gear drives huge grinding mill | Machine Design
But this is no ordinary mill. With inside dimensions of 36-ft diam. and 19-ft long, this semi-autogenous grinding mill (SAG — see next section) will use a 43-ft diam. ring-gear drive to transmit ...
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, service-friendly and fit for purpose …
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