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Integrated drive technology from Siemens enhances productivity
In future, the 36-foot SAG mill of the new production line will be operated with a 13.5-megawatt drive. A further gearless mill drive with 22 megawatt output will ensure equally efficient and reliable driving of a ball mill with an inner diameter of 28 foot. Gearless drive systems are distinguished by their high efficiency and their low ...
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II-100 II-101 INTRODUCTION
During commissioning of the Cadia mills and shortly after, problems developed in the mill drives. The SAG mill gearless drive stator deflected excessively during inching and it "resonated" at normal operating speeds. Furthermore, the ball mill gears were severely scored after four months of operation. EAnD were commissioned by
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Gearless mill drives
ball mill at Ciments Lambert-Lafarge, France. The 6.4 MW gearless motor is still operating today ... The ABB gearless mill drive (GMD) is the most powerful mill drive system available, combining the highest levels of efficiency, reliability, flexibility and availability. 3
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Electrical Aspects of the 8750 hp Gearless Ball-Mill Drive …
Electrical Aspects of the 8750 hp Gearless Ball-Mill Drive at St. Lawrence Cement Company Abstract: The first large gearless ball-mill in North America has been …
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Frozen charge detection and automatic loosening with …
26ft Ball Mills of 16.4 MW commissioned in 2011. In the light of increasing interest in that technology various further Gearless Mill Drives with FCS are presently being erected or are in fabrication phase. Los Bronces suffered a Frozen Charge in their expansion plant Confluencia on 10th September 2012 at its Ball Mill No. 2.
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Gearless Mill Drives
9 days of unscheduled downtime. First part of final repair in 2009 including repair of occurred damages:. Downtime: 43 days minus 4 days for mill maintenance. Scheduled completion of final repair in 2010:. Downtime: 15 days minus 4 days for liner change.
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AU2012215538A1
The invention relates to a stator core for a gearless drive of a tube mill having high stiffness, wherein the stator core, together with a stator frame, forms a stator for a gearless drive of a tube mill and the stator core comprises stator core pieces (1, 1'). ... Ball mill driven by linear motion actuator GB2344224A (en) * : 2000-05 ...
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SIMINE Gearless mill drives
Gearless mill drives. Longer service intervals thanks to low-wear drive processes SIMINE Gearless mill drives' rpms can be tailored to your operations at any time, and are infinitely variable and uncomplicated. Whether manually or fully automatic – rpms can be adjusted to account for the proper-ties of the ore, resulting in significantly less
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Gearless mill drives
Go gearless to meet your business objetives by exceeding standard availability targets in your grinding operations. ABB's GMD is the most powerful mill drive system in the …
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CN106130290A
The invention discloses a kind of annular permanent magnet gearless ball mill direct driving motor, belong to ball mill and drive equipment technical field.This direct driving motor includes stator and rotor, and wherein, rotor is fixedly mounted on the outer surface of ball mill barrel by sectional type rotor core, and concentric with ball mill barrel；Stator …
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ZOOM ZPU5000 Standalone with Modbus Users Manual …
• Gearless SAG mill • Gear drive SAG mill • Gearless ball mill • Gear drive ball mill 1.4.1.1 General Tab • Machine: machine category - Hydro, Motor, Mill, or Turbo • Type: depending on selected machine category, - if the selected category is Motor, one option only is available: Motor - if the selected category is Hydro, four options
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The Siemens 42ft gearless mill drive, still an …
19.3MW Gearless Mill Drive at the Peñasquito site in Mexi-co. Up to forty acceleration sensors have been placed inside the motor to measure the impact of two exciters …
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15000-HP gearless ball mill drive in cement-why not!
15000-HP gearless ball mill drive in cement-why not! Abstract: Over recent years, there has been a clear trend toward higher capacity cement production units. Five to ten years ago …
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ABB Library
With this innovative concept the gearless mill drive eliminates all critical mechanical components inherent within a conventional mill drive system, such as ring gear, pinion, …
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ABB to supply gearless mill drives to Cerro Verde
April 1, 2012 - ABB will supply gearless mill drives (GMDs) for six ball mills and twin-drive systems for eight high pressure grinding rolls (HPGRs) at Cerro Verde copper mine in Peru. The two contracts were awarded in the first quarter of 2012. Deliveries are scheduled for Q4 2013 and Q1 2014.
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Concepts of Gearless Ball-Mill Drives
Concepts of Gearless Ball-Mill Drives. Abstract: In the past the conventional method of driving large ball mills included some form of speed reducing gear between the higher …
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Electromagnetic design and thermal analysis of module …
With the large‐scale development of the ball mill, the direct‐drive gearless ball mill has emerged, eliminating the limitation of the transmission torque of large gear. However, it is difficultto process, transport, install and maintain the gearless ball mill because of its vast volume, and the coils cannot be decoupled freely.
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SIMINE Gearless mill drives
Gearless mill drives. Longer service intervals thanks to low-wear drive processes SIMINE Gearless mill drives' rpms can be tailored to your operations at any time, and are …
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TECHNICAL AND COMMERCIAL BENEFITS OF …
The first Gearless Mill Drive (GMD) with a power of 6.5 MW was installed 1969 in a cement milling process in the cement plant Le ... The question what drive system is optimal for SAG and ball mills is project specific and depends on the plant layout and the design of the grinding circuit. When drives systems are compared the main
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Gearless Drives for Ore Conveying and Grinding
Air gap monitoring system in a gearless drive. Gearless Drives for grinding mills. Among the most outstanding GMD's in operation are the ones for the Antapaccay mine. The SAG mill has an inner diameter (ID) of 40 feet, an effective grinding length (EGL) of 25 feet and 24,000kW rated power, whereas the two (2) ball mills have an ID of 26 feet ...
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Major FL mill order for Russian copper mine includes four …
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. ... All drives are Gearless Motor Drives from ABB. Each line will also include an FL cone crusher solution with state of the art digitalisation and control system. The first production line will be delivered ...
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Gearless conveyor drives
Do more with less - go gearless. Mine operators are challenged with moving more material on conveyors that may cover distances in the tens of kilometers and ascend steep gradients. To increase overall reliability, mining companies also want fewer transfer stations between conveyors, which may require wider and longer belts.
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gearless mill drives (marsh)
René Chacon, ABB, Switzerland, details how gearless mill drive … · · gearless mill drive system (GMD) for the mine's 40 ft SAG mill, as well as other drives, electrical Insurability of Large Gearless Mill Drives
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Comminution power – geared versus gearless
It is well known in the mining industry that the biggest mining concentrators, with the highest throughputs and largest mills, have long used gearless mill drives (GMDs). Since their introduction into the …
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Revolutionary Drive Controller for Gearless Mills
Ringmotor of the Gearless Mill Drive (GMD) System. CYCLOCONVERTER Principle The Cycloconverter is a frequency changer which converts a poly-phase voltage with the frequency f1 into a single or poly-phase voltage with a different, lower frequency f2. On Gearless Mill Drives (GMD), the operational output frequency varies from 0.3 Hz up to …
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11 System Overview (Gearless Mill Drive) | PDF
Single cement mill of 160 metric tons / hour was required. No gearbox manufacturer could supply a gearbox for this. BBC (later ABB) came up with the idea of a Gearless Mill Drive. BBC was awarded to supply the first GMD in 1969 Le Havre/France. The first GMD was running with its original design from 1969 until.
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Electrical Aspects of the 8750 hp Gearless Ball-Mill Drive at St
The first large gearless ball-mill in North America has been successfully installed at the Mississauga, Ontario, plant of the St. Lawrence Cement Company. The motor rating is 8750 hp (6500 kW) at 14.5 r/min (4.84 Hz). The electrical aspects considered of interest are discussed in the paper.
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OVERVIEW OF MV DRIVE TECHNOLOGIES IN MINES …
speed of the mill. Nowadays GMDs up to 38MW for 42' ball mills are reported to be in production. ADVANTAGES OF GMD 1) About 4% higher energy efficiency can be achieved with gearless drive technology. 2) No mechanical limits so high power is available at the driven component. 3) Smaller footprint of complete drive train.
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Used Ball & Sag Mills for Sale | Mining | Surplus Record
Search through huge mining inventory of used Ball mills, Sag mills, Pebble mills, grinder mills for sale today and ready for shipping! Allis-Chalmers, , Hardinge, Fl and more! ... VICKERS RUWOLT 5.3m x 5.6m (17'4" x 18'4") AG/SAG Mill with 2250 HP (1678 kW) drive. View Details Contact Seller Request Price. Expand. 6 Photos. 18' x 10. ...
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Ball mill driven with gearless mill drive
Download Citation | Ball mill driven with gearless mill drive | This paper introduces how PT Semen Bosowa/Indonesia considered the installation of a cement plant gearless mill drive, the criteria ...
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