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
• 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 .
Gearless mill drive (GMD) technology has further expanded the use of large AG/SAG milling allowing to produce the world's largest SAG mill of 42’ in diameter drawing power at 28 MW Today, is the world leading supplier of gearless AG/SAG mills operating globally
ABB Commissions Gearless Mill Drivers, Shares Fall
Jun 16, 2014· The company had received this contract in 2011 to provide GMD for 3 mills - a 36-feet 12 megawatt GMD required for the semi-autogenous mill and a couple of 22-feet 89 MW GMD’s for the two ball mills Apart from these, ABB was required to provide gas insulated switchgear with a capacity of 220 kilovolt (kV), harmonic filters and power factor .
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ABB: a 28 MW GMD for a 40' SAG mill and two 22 MW GMDs for 28' ball Chile, China, Germany, North America, Peru, South Africa, Sweden and Contact US Multotec Kathu and ceramic wear liners for chutes, hoppers, pipelines and transfer points in mineral processing plants Mill and Scrubber Linings
Mill drives: the desire for increased power and the ,
Between 2001 and 2008, a limit of 22 MW was placed on SAG mill drives (as GMDs) by some operators and principal motor designers/manufacturers until the reasons for known problems in design or manufacturing were better understood and resolved Accordingly, the latest 40 ft dia SAG mill is rated at 29 MW and 78% CS, with a 42 ft dia
CONGA: THE WORLD’S FIRST 42 FOOT DIAMETER 28 MW GEARLESS SAG MILL ABSTRACT In 2010 Newmont made the decision to purchase a 42 foot (ft) Semi-Autogenous Grinding (SAG) mill from and a 28 Mega-Watt (MW) Gearless Mill Drive (GMD) from ABB for the Conga Project in Pe
Current Issues on High-Power Cycloconverter - fed Gearless ,
use of big mill grinding circuits, where large power gearless motor drives with cycloconverters in the range around 20 MW are being applied for semiautogenous (SAG) mills and re-cently, ball mills are also being considered This work addresses some current issues involving design and application of high-power drives employed in SAG grind-
SAG Mill Control: It Shouldnt be that Hard - womp-int
SAG Mill Control: It Shouldn’t be , (492 ft) long, and will be powered by a 28-MW Siemens GMD Siemens also supplied the gearless drives for a 36-ft SAG mill with a rated power of 15 MW and a 26-ft ball mill with 155 MW of rated power recently installed ,
Gearless mill drive (GMD) technology has further expanded the use of large AG/SAG milling allowing to produce the world's largest SAG mill of 42’ in diameter drawing power at 28 MW Today, is the world leading supplier of gearless AG/SAG mills operating globally Online Chat
SAG is an acronym for Semi-Autogenous Grinding SAG mills are autogenous mills but use grinding balls like a ball mill A SAG mill is usually a primary or first stage grinder SAG mills use a ball charge of 8 to 21% The largest SAG mill is 42' (128m) in diameter, powered by a 28 MW (38,000 HP) motor
ABB commissions gearless mill drive system in Peru ,
Baden, Switzerland, June 9, 2008 – ABB successfully completed commissioning of a 165 MW gearless mill drive (GMD) system for a 32 feet SAG (semiautogenous) mill at Minera Yanacocha The mine, located in Cajamarca, Peru, is the largest gold producer in Latin America Newmont Mining Corporation .
Operating mills with a Siemens GMD not equipped with the Frozen Charge Shaker can be principally upgraded , (RPM) with a 38ft, 20 MW SAG Mill in Brazil and Lumwana having a 38ft, 18 MW SAG and one 26ft, 16 MW Ball Mill in Zambia, all three mills put in ,
mineral processing sag mill mineral processing sag mill Outotec presents the world's largest SAG mill Mineral Processing The mill will be driven by a Gearless Motor Drive (GMD) which at 280 MW is equal to the largest grinding mill power ever used in the mining industry
THE COMMINUTION CIRCUIT DESIGN FOR THE CONSTANCIA ,
installed power to maximise net present value The use of a dual SAG mill arrangement in a cost effective layout added substantial value to the project by increasing both initial and post Year 6 plant throughput for a modest increase in project capital cost when compared with the DFS case of a single 215 MW Gearless Motor Drive (GMD) SAG mill
CONGA: THE WORLD’S FIRST 42 FOOT DIAMETER 28 MW GEARLESS SAG MILL The 28 MW GMD for the 40 ft SAG mill of the Toromocho Project has been delivered and will be installed at an even higher altitude of 4,600 masl (over 15,000 ft) , »More detailed
large synchronous motor The poles of , stage mill (no ball mill after the SAG mill) and has a diameter and length of 32’, driven by a 165 MW GMD from ABB TECO-Westinghouse Motor Company synchronous motors and generators provide superior value in terms of , ball and sag mills, chippers, mixers, pulp refiners .
The 28 MW GMD for the 40 ft SAG mill of the Toromocho Project has been delivered and will , Request Quotation , AG, SAG & ball mill - Increase Grinding , A measure of the success shows a significant benefit over our gains with the 40 ft SAG mill at Cadia Mine in Australia
ABB Commissions Gearless Mill Drivers, Shares Fall ,
• 5 critical steps in your mill installation, page 1 • Flotation launder design, does it matter? page 5 , 28 MW GMD (Gearless Mill Drive) , Purpose-built cradles fixed to shell flange on an Outotec 40ft SAG mill The lifting attachments for large critical lifts need to be
SAG mill grinding process – Gearless mill drives systems – Gold , GMD system SAG mill , For a SAG mill with 15 MW of power a difference of 2 % in drive , Inching is used to position the mill for maintenance work such as , »More detailed
The contract includes the engineering for a 28 megawatt GMD system for a 42’ SAG (semiautogenous) mill, the world’s largest mill in diameter In addition, it includes the engineering for two 156 mw GMD systems for two 26’ ball mills ABB Switzerland Ltd, Zürich (CH), Tel: +41 58-586-8832, abb
1 x 28 MW GMD to power the 40 ft SAG mill; 2 x 22 MW GMDs to power two 28 ft ball mills ; The site's altitude and high power system required ingenuity and flexibility when in came to engineering the three systems Some of the changes compared to GMDs for lower altitudes were: N ew cooling system able to dissipate heat generated by the most .
The three GMDs will be the largest such systems operating anywhere in the world and at the highest altitude One system will be installed on a 40-foot SAG (semi-autogenous) mill with a power rating of 28 megawatts (MW); the other two will drive 28-foot ball mills with power ratings of 22 MW GMDs are the heart of the mining process
Comminution Circuits - Featured Projects - DJB Consultants
Comminution Circuits – Featured Projects ANTAPACCAY Southern Peru, 2009-2013 (108,000 tpd – 80,000 tpd) Predictions of mill throughput from a porphyry copper open pit based on comminution test results of 22 composites and the available motor power of a “Standard” SAG Mill/Ball Mill circuit consisting of one 40 ft dia x 22 ft EGL SAG Mill rated at 24 MW GMD and two Ball Mills, each 26 .
Codelco Purchases Gearless Drives from ABB | E & MJ
The GMD system portion consists of a 12 MW GMD for a 36-ft SAG mill and two 89 MW GMDs for two 22-ft ball mills Leaving the factory at the end of 2011, the two GMDs will be the first ones assembled at ABB’s new GMD assembly factory in Basel, Switzerland
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