mill dual motor sag mills
2020-11-25T05:11:21+00:00
Autogenous and SemiAutogenous Mills
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 SAG/AG Mills range in size 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 millSAG Milling in Australia Revised SubmissionGearless 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 gearless SAG mills operating globallySAG mills Outotec SAG Mill Components SAG Mill Components As mentioned earlier, mills greater than 26′ in diameter and greater than 4,000 horsepower will often feature conical ends usually with radial reinforcing ribs If the advantages of a synchronous motor are desired on any dual pinion drive application, dual SAG Mill Components Mineral Processing This paper concentrate s on modern motor and drive solutions for s ingle and dual pinion driven Ball an d SAG Mills and the motors and drives used to p ower them It will cover (PDF) Evaluation of synchronous motors on grinding
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 • 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 drives libraryeabbMill load sharing – Maintains equal torques on dual pinion mills throughout the whole speed range Controlled rollback – Prevents backlash and reduces downtime Mill power ride through – Keeps the mill operating even under voltage dips Overduty cycle – Ringgeared mill drives Grinding ABB 5 Low ball charge SAG mill, high mill speed (4% ball charge, 90% Nc) A cross between AG and SAG for competent, abrasive ores As typically operated in RSA 6 SAG mill (configurations 3, and 5 ) with recycle crusher Competent ores, better suited to coarse grind sizes as circulating loads can be high 7 SAG mills treating partially or fullyAN OVERVIEW OF SINGLE STAGE AUTOGENOUS AND 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 SAG/AG Mills range in size from 43m through 122m in diameter with powers as high as 28,000 kWAutogenous and SemiAutogenous Mills
QdX4 Mill Drive system
SAG mill 36 ft dual drive SAG mill 40 ft QdX4TM Mill Drive Foundation •Dual motor load sharing between two TM QdX4 Mill Drives installed in both 40’ SAG and 28’ Ball mills This allows for complete interchangeability, and reduced amount of site sparesThe QdX4™ Mill Drive was developed in close collaboration with both CMD and Ferry Capitain Engineering as a solution for the mining industry for large mill drives The QdX4™ Mill Drive features internal torque splitting capability transmitting motor input power to the pinion shaft and equally dividing into two mill pinions QdX4™ Mill Drive 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 optionMill drives: the desire for increased power and the SAG Mill Components SAG Mill Components As mentioned earlier, mills greater than 26′ in diameter and greater than 4,000 horsepower will often feature conical ends usually with radial reinforcing ribs If the advantages of a synchronous motor are desired on any dual pinion drive application, dual synchronous motors are available to SAG Mill Components 911 Metallurgist 1 x SAG Mill Siemens Motor For Sale/ReAssignment Mill Details Type of Mill SAG Mill Mill Dimensions 11,582 mm x 7,759 mm (38’ x 26’) (D x L) Default Mill Speed 7580 RPM Mill Speed 7561008 RPM Liners Excluded Mill Drive Motor Type Wrap Around (included) Mill Drive Motor Size 19,400 KW (26,016 hp) Variable Speed Drive Yes Max1 x SAG Mill Siemens Motor globalpam
load sharing of dual motor grinding mill drives
When dualpinion mills are used care must be taken that the load is shared equally between the two pinions ABB's fast direct torque control (DTC) ensures accurate and coordinated load sharing DTC is the ABB advanced motor control method for drives as it allows precise control of the motor Get Price; Large Grinding Mills DualMotor Drives The new mill with 10x the rated capacity could be installed in place of the old obsolete 100tph mill without disturbing the remaining 13 mills In this design, the rotating field poles of the synchronous motor are saddled directly onto a machined shoulder of the cylindrical mill body itself, thus forming an integral part with the millGearless Warp Around SAG Mill 911 Metallurgist 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 millTHE COMMINUTION CIRCUIT DESIGN FOR THE 5 Low ball charge SAG mill, high mill speed (4% ball charge, 90% Nc) A cross between AG and SAG for competent, abrasive ores As typically operated in RSA 6 SAG mill (configurations 3, and 5 ) with recycle crusher Competent ores, better suited to coarse grind sizes as circulating loads can be high 7 SAG mills treating partially or fullyAN OVERVIEW OF SINGLE STAGE AUTOGENOUS AND SAG Mill Components SAG Mill Components As mentioned earlier, mills greater than 26′ in diameter and greater than 4,000 horsepower will often feature conical ends usually with radial reinforcing ribs If the advantages of a synchronous motor are desired on any dual pinion drive application, dual synchronous motors are available to SAG Mill Components Mineral Processing Metallurgy
QdX4™ Mill Drive
The QdX4™ Mill Drive was developed in close collaboration with both CMD and Ferry Capitain Engineering as a solution for the mining industry for large mill drives The QdX4™ Mill Drive features internal torque splitting capability transmitting motor input power to the pinion shaft and equally dividing into two mill pinions 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 optionMill drives: the desire for increased power and the Inventory ID: 6CHM03 UNUSED FLSMIDTH 36’ x 24' Dual Pinion SAG Mill with 2 ABB 9,000 kW (12,069 HP) Motors for Total Power of 18,000 kW (24,138 HP)Used Sagmills For Sale AM King part inventory If required, ring motor drives can be fitted to shellsupported grinding mills up to the largest sizes SAG/ball mill circuit incorporating pebble crushers and a POLYCOM® highpressure grinding roll SAG and ball mill for gold ore grinding One of three SAG mills with 975 m diameter and 2 x 4000 kW drive power These millsAutogenous mills, semiautogenous mills and ball mills Figure 1 – Top view of SAG mills with alternative drive options; left side: dual pinion drive including motor, gearbox, pinion and girth gear; right side: gearless ring motor Declining ore grades, leading to increased material transport and plant throughput requirements, are one of theIncreasing availability through advanced Gearless Drive
THE COMMINUTION CIRCUIT DESIGN FOR THE
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 millONTARIO – ABB, the leading power and automation technology group, has commissioned an upgrade to Vale‘s existing Clarabelle dual pinion semiautogenous (SAG) millThe project was completed ontime and onbudget with an excellent safety record The Clarabelle mill beneficiates nickelcopper ore from various sources and companies and to produce a nickelcopper concentrate and copper MINERAL PROCESSING: ABB commissions Clarabelle mill mills IC Engine or Motor Backstop Incher Reducer Main Reducer Clutch Gear Pinion Kiln Pillow Blocks Main Motor Cplg main drive motor or 2 x main drive motor for dual pinion drives The power computed above is considered P inch = N oinch P millmotor N omill Source IEEE Association Event Installation Inspection Relining Number of Selecting Inching Drives for Mill and Kiln ApplicationsThe SAG mills are fitted with a dual pinion drive system and are driven by a variablespeed drive comprised of a SER hypersynchronous drive The SAG mills are 11 m (36’) dia, 73 m EGL (265’) Each SAG mill is driven by two 8 MW motorsMajor Mines Projects Constancia Mine
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