• Gearless Warp Around SAG Mill 911metallurgist

    2018-11-11 · Gearless Warp Around SAG Mill. For almost a decade now, very good operating experiences have been gained with a total of 28 gearless ring Gearless mill drives ABB,2021-2-16 · The poles of the gearless or synchronous motor (also called wrap-around motor or ring motor) are directly installed on the pole flange of the mill shell, turning the mill body into the rotor. The stator is then wrapped around the mill. The gearless motor is fed by a cycloconverter which has a rated output frequency of around 5 Hz for the GMD drive.

  • Gearless mill drives Grinding ABB

    Gearless mill drive system (GMD) 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 market to power semiautogenous (SAG), ball and autogenous (AG) mills, This ’workhorse’ for grinding operations combines a robustABB 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)

  • SAG Milling in Australia -Revised Submission

    2014-10-1 · 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 Mill Grinding Circuit Design 911metallurgist,2016-6-6 · Gearless drives (wrap-around motors) are typically used for large mills, with mills of 25 MW or larger having been designed. Several circuits have single-line design capacities exceeding 100,000 TPD. A large SAG installation (with

  • The Siemens 42ft gearless mill drive, still an

    2021-12-16 · • Motor behavior during normal operation with a loaded mill The result is the design of a Gearless Mill Drive motor for a 42ft Grinding Mill providing up to 35MW of power. Evolution is still the main GMD design philosophy, but realistic and proven computer models help to look beyond experience, where testing is impossible.Siemens Supplies Gearless Drive Systems with 'Frozen,2006-9-15 · For the two ore-grinding mills, Siemens is supplying gearless ring motor drive systems supplied with power via cycloconverters. The SAG mill has a diameter of 38 feet (11.6 meters) and will be equipped with a 18 megawatts drive system. The 26 foot mill (8 meters) will have a drive output of 16 megawatts.

  • Siemens setting the standards in mining International

    2021-8-11 · I would highlight the world‘s first gearless drive for a SAG mill in 1988 at Chuquicamata and the first 40 ft mill GMD at Cadia in 1998 and the first GMDs at an altitude above 4,000 m at Antamina in 2011. In 2016 we also set a record at one project with six of the highest powered 40 ft GMDs ever built on AG mills at the CITIC PacificSAG Milling in Australia -Revised Submission,2014-10-1 · 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

  • SAG Mill Grinding Circuit Design 911metallurgist

    2016-6-6 · Gearless drives (wrap-around motors) are typically used for large mills, with mills of 25 MW or larger having been designed. Several circuits have single-line design capacities exceeding 100,000 TPD. A large SAG installation (with gearless sag mill maintenance schedules,ABB buys ring motor business to boost its gearless mill. Jul 30,,ABB is buying Alstom's ring motor business to enhance its gearless mill drive,The GMD system also needs less maintenance and typically offers,Raw material from the crushing stage is typically fed to SAG, AG (autogenous) and ball mills for further processing to,'Rotation for life' plan guarantees that.

  • Siemens Supplies Gearless Drive Systems with 'Frozen

    2006-9-15 · For the two ore-grinding mills, Siemens is supplying gearless ring motor drive systems supplied with power via cycloconverters. The SAG mill has a diameter of 38 feet (11.6 meters) and will be equipped with a 18 megawatts drive system. The 26 foot mill (8 meters) will have a drive output of 16 megawatts.THE ENGINEERING AND PROCESS EFFECTS OF ,The motor designer (or vendor) will convert the specified rated mill speed into the speed of the motor, ωrated as Hz, which for a Gearless Mill Drive is simply ϕRPM ÷ 60. For a gear driven mill, the motor speed is a function of the mill speed ϕRPM, and the gear ratio of the mill bull gear and the drive pinion.

  • Industrial Solutions Project Brief

    2018-5-9 · ABB also provided Collahuasi with drives and ring motors for one SAG mill and two ball mills. Powerful ABB gearless drives, rated at 15.5 mega-watts each, drive two eight-meter (26 feet) diameter ball mills that grind small pieces of ore at eleven revolutions per minute. However, the plant’s showpiece is the world’s largest gearless mill drive.Grinding Mills EAnD,Literature Review: Gearless Motor Failures A Mill Designer’s Viewpoint. This post presents a review of a paper by a mill designer on the state-of-the-art of ring motor design in gearless drives. The conclusions in the paper are not justifiable. Ring motors are much more complex than grinding mills and the simple remedies offered in the

  • Ring gear drives huge grinding mill Machine Design

    2000-3-1 · Ring-motor drives were first used in cement industry mills and later in mining industry applications. The largest ringmotor- driven mill in the world is Our History as Comminution Consultants DJB Consultants,1983: Conceptual study and pilot plant test work for the first 36 ft dia. SAG Mill with a GMD (Gearless mill drive, or ring motor) at 15,000 hp and commissioned in 1991. 1986: Development and successful implementation of a Bond Work Index-based methodology for estimating power requirements for SAG milling and secondary Ball milling.

  • ABB acquires ring motor business from Alstom

    2013-7-30 · Zurich, Switzerland, July 30, 2013. ABB, the leading power and automation technology group, announced today the acquisition of Alstom’s ring motor business to enhance its gearless mill driveGearless Mill Drives Beneficiation Siemens Global,2021-12-24 · The SIMINE Gearless mill drives pump system significantly enhances concentrator productivity by eliminating the reducer gear between motor and pump and all corresponding maintenance. In addition, the cyclone pumps with variable speed can adjust their energy consumption to the optimized flow of pulp, resulting in energy savings of up to 30%. The

  • gearless sag mill maintenance schedules

    ABB buys ring motor business to boost its gearless mill. Jul 30,,ABB is buying Alstom's ring motor business to enhance its gearless mill drive,The GMD system also needs less maintenance and typically offers,Raw material from the crushing stage is typically fed to SAG, AG (autogenous) and ball mills for further processing to,'Rotation for life' plan guarantees that.mw vertical grinding mill motor siemens,gearless ring motor for sag mill principles Know More Conga The world s first 42-foot diameter 28 MW gearless SAG mill SAG mill, 40 ft, 42 ft, gearless mill drive, GMD, SAG manufacture, reliability The gearless motor also called wrap-around motor or ring motor is a very large this modification from axial to radial cooling, the cooling

  • Industrial Solutions Project Brief

    2018-5-9 · ABB also provided Collahuasi with drives and ring motors for one SAG mill and two ball mills. Powerful ABB gearless drives, rated at 15.5 mega-watts each, drive two eight-meter (26 feet) diameter ball mills that grind small pieces of ore at eleven revolutions per minute. However, the plant’s showpiece is the world’s largest gearless mill drive.Gearless mill drives Mining Weekly,2009-6-26 · Gearless mill drives (GMDs) have been installed on platinum-miner Anglo Platinum's Potgietersrust Platinum (PPRust) 600 000 t/m concentrator.

  • THE ENGINEERING AND PROCESS EFFECTS OF

    The motor designer (or vendor) will convert the specified rated mill speed into the speed of the motor, ωrated as Hz, which for a Gearless Mill Drive is simply ϕRPM ÷ 60. For a gear driven mill, the motor speed is a function of the mill speed ϕRPM, and the gear ratio of the mill bull gear and the drive pinion.LAKE COWAL,EMF,2021-12-2 · Lake Cowal is a gold mine in NSW operated under Evolution Mining. EMF has recently completed cleaning and inspecting the Ball and SAG mill gearless drive motors. This involves entering the motors through inspection hatches and meticulously brushing and vacuuming the internal windings along with a thorough inspection of the insulation, slip ring

  • ABB acquires ring motor business from Alstom

    2013-7-30 · Zurich, Switzerland, July 30, 2013. ABB, the leading power and automation technology group, announced today the acquisition of Alstom’s ring motor business to enhance its gearless mill driveABB acquires ring motor business from Alstom PACE,2013-8-2 · The gearless motor also called wrap-around motor or ring motor is a very large synchronous machine which uses power electronics and a magnetic field to control the speed of the motor rotation. With no mechanical interaction

  • DE19608286B4 Ventilation system for the ring motor of a

    Ring motor for a tube mill, in which a motor space, which contains rotor windings and stator windings with their winding heads and their associated winding head spaces, is sealed off from the environment and in which several fans are assigned to a stator housing, the outlet openings of which are connected with a winding head space in terms of ventilation, characterized in that ,