Selecting Inching Drives for Mill and Kiln Applications
Selecting Inching Drives for Mill and Kiln Applications Glen Cahala Frank C Uherek, Principal Engineer - Gear Engineering Software Development Abstract The inching drive, also known as a barring or auxiliary drive, is an important component of any mill or kiln installation It is used for maintenance and inspection purposes, as
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sag mill dual pinion geared drive - dylaneventnl
Updates on geared vs gearless drive solutions for grinding World s largest geared drive2x8500kWWushan 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
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Mining & Non-Ferrous - CITIC-Heavy Industries Co Ltd
These mills are scheduled of start up on 2012 Our market share in China exceeds 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 largest in China
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Advantages of SER drives for SAG mills | GoHz
19-12-2014· 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 (cyclo-converter) is typically used because gearboxes and ,
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AG mills - Outotec
Gearless mill drive (GMD) technology has further expanded the use of large AG 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 gearless AG mills operating globally
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ABB gearless mill drives - YouTube
21-02-2019· https://newabb/mining/grinding/gearless-mill-drives | ABB ensures maximum throughput, highest availability and peak performance throughout the life cycl.
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large sag and ball mill drive systems
AG/SAG mills up to 32ft/98m in diameter , p Large ball mills (or those using large diameter Chat Now GrindingExpert - KnowledgeScape , SAG mill, ball mill, ring gear, dual pinion, drive systems, variable speed , The grinding circuit consists of a SAG mill and two ball
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sag mill drives sale - erquy-vakantienl
Gearless AG/SAG Mills Gearless drives (ringmotors) have been used on tumbling mills for several decad The design Chat Online Gearless Mill Drives - ABB Group Antamina Compania Minera Antamina SA Peru Project: One SAG Mill and 3 Ball Mill Drive Sys Capacity: SAG Mill 1000 t/h Ball Mills 1000 t/h Consultant: Bechtel, USA
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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 165-MW GMDs are employed on 26-ft ,
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Gearless mill drives Grinding ABB
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 provide highest throughput reliability
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Siemens expands mining portfolio to include gearless drive ,
28-08-2010· Siemens expands mining portfolio to include gearless drive system for 42-foot SAG mills Siemens is now able to provide to mining companies a gearless drive system for SAG mills with a tube diameter of 42 feet This enables throughput to be almost doubled in comparison with the 38-foot mills commonly used today
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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
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Gearless mill drives Grinding ABB
Sag Mill Syncronis Motor high axial vibration non drive On site we have a Sag Mill Driven by a 5500KW Motor We have a vibration issue right across the Mill The highest vibration is 30mmsec RMS axial on the motor non drive end bearingWhite metal Bearing The gear mesh frequency is 4200 CPM The dominant frequency is 2400 CPM
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SAG Mill | Autogenous and Semi-Autogenous Mills | FL
Benefit from AG and SAG Mill in many drive arrangements, sizes and bearing designs Your operation requires a Semi Autogenous Mill (SAG mill) or Autogenous Mill (AG Mill) that is flexible, durable, cost-efficient and tailored to ,
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TECHNICAL NOTES 8 GRINDING R P King
LG A mill power equation for SAG mills Minerals and Metallurgical Processing Feb 1990 pp57-62 Gross power No load power Net power drawn by the charge (813) The net power is calculated from Net power KD25L e! c/ Watts (814) In equation 814, D is the diameter inside the mill liners and Le is the effective length of the mill including the .
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Mill (grinding) - Wikipedia
SAG mill SAG is an acronym for semi-autogenous grinding SAG mills are autogenous mills that also 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
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Mill drives: the desire for increased power and the ,
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 mill built but not yet operational The more recent option
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SAG Mill Grinding Circuit Design - 911metallurgist
06-06-2016· PT Freeport Indonesia, and others with 116-m mills) have installed SAG mills of 20 MW Gearless drives (wrap-around motors) are typically used ,
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Inching Drive For Sag Mill Grinding Mills/Industry: Mineral
SAG mills (semi-autogenous grinding mills) Gearless mill drive (GMD) technology has further expanded the use of large SAG milling allowing to produce the world's largest SAG mill of 42’ in diameter drawing power at 28 MW
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Ring gear drives huge grinding mill | Machine Design
01-03-2000· The SAG mill is followed by two 20-ft diam, 7,500-hp gear-driven ball mills Another type of drive, less commonly used, consists of a motor-driven speed reducer that is coupled to one of two .
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SAG Mill Variable Speed Drive - 911 Metallurgist
18-07-2018· Five methods of providing variable speed drive capability on big grinding mills are as follows: Twin DC drives Gearless or ring motor drives Twin CCV or Cycloconverter Twin ICI or Load Commutated Inverters using variable frequency Quadramatic II LCI drive
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ABB commissions six gearless mill drives at Cobre Panama ,
29-10-2019· Two 28 MW gearless mill drive systems (GMDS) are operating in the mine’s 12-metre SAG mills and four 165 MW GMDS are employed in 26 ball mills along with associated control systems
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THE ENGINEERING AND PROCESS EFFECTS OF CHOOSING A ,
The paper specifically describes SAG mills, but the equations and principles apply equally to any conventional tumbling mill, such as AG, ball or rod mills MOTOR ELECTRO-MECHANICAL CHARACTERISTICS The cost of a motor of a Gearless Mill Drive depends mainly on two parameters: • Diameter of the motor, • Rated Torque of the motor.
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How the Modern SER Drive boosts grinding performance | CSE ,
The Modern SER Drive is a compact, powerful, multi-functional and reliable addition to other SAG mill control technologies on the market today The Modern SER’s lower-cost design, achieved through the reduced need for supporting plant – combined with its lower energy usage and exclusive design benefits results in lower ongoing costs, increased reliability, finer grinding ,
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abb drives sag mill - galmonzait
ABB 6 ABB's gearless mill drives power two massive grinding mills, which are theABB commissions six gearless mill drives at Cobre Panama, 29 Oct 2019 The six ABB gearless mill drives, which are the most powerful mill drive systems on the market for semi-autogenous (SAG), ball and autogenousABB buys ring motor business to boost its gearless mill drives, 30 ,
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Advantages of SER drives for SAG mills | GoHz
19-12-2014· Advantages of SER drives for SAG mills Friday, December 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 (cyclo-converter) is typically used because gearboxes and pinion gears reach their present limit in size
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TECHNICAL AND COMMERCIAL BENEFITS OF GEARLESS MILL DRIVES ,
Errath, R, 2006, “The Gearless Mill Drive, the Work Horse for SAG and Ball Mills”, SME Conference, St Louis Protection and Supervision Systems for Gearless Mill Drives M Ahrens
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Drive Solutions for the Global Mining Industry
drive application is a dual-pinion SAG mill driven by two 5,000 kW wound rotor induction motors (WRIM) Two TMdrive-10SPRs control motor speed by recovering rotor current and returning the power to the utility supply Confi gured in a twin
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Sentinel: Siemens Gearless Mill Drives - YouTube
19-01-2016· The mills at Sentinel in Zambia are amongst the world’s biggest, with 2 off 40 ft SAG mills complete with 28 MW drives, and 2 off 28 foot-ball mills with 22 .
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Abb Drives Sag Mill - hansestadt-demminde
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 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
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