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gearless ring motor for sag mill principles

  • Gearless mill drives Grinding ABB

    Our GMD eliminates all mechanical components of a conventional mill drive system, such as ring-gear, pinion, gearbox, coupling, motor shaft and motor bearings: By mounting the rotor poles directly onto the mill, the mill itself becomes the rotor of the gearless motor. The motor is fed by a fuse-less cycloconverter that is connected to the MV network through three special cycloconverter

    Gearless mill drives ABB

    The gearless mill drive eliminates ring-gear, pinion, gearbox, coupling, motor shaft and motor bearings, used within a conventional mill drive system. By mounting the rotor poles directly onto the mill, the mill itself becomes the rotor of the gearless motor. Building a track record ABB's experience in optimizing gearless solutions for grinding applications extends over 50 years, making it the

    Gearless Mill Drives Beneficiation Siemens Global

    The Siemens 42-ft Gearless Mill Drive, still an evolutionary design approach? (SAG Conf. 2015) Optimization of the drive system for a cyclone feed pump (SME 2015) Increasing availability through advanced Gearless Drive Technology (CMP 2014) Design and dynamic behavior of large ring motors for grinding mills (SMMH 2012)

    Gearless Drives Siemens

    plied gearless drives for two 36-foot ring motors, de-veloping a 12,000 kW gearless drive for the Kennecott, Utah, SAG mill and a 11,200 kW gearless drive for the El Teniente, Chile, SAG mill. In a continued call for larger, even more powerful drives, Siemens kept pace. In 1996, Freeport ordered the first gearless drive for a 38-foot SAG mill

    The Siemens 42ft gearless mill drive, still an

    more powerful Gearless Mill Motors for the expected de-mand for 42ft and 44ft mills. The evolutionary design methodology is to reuse proven design elements. A detailed risk assessment and root cause analysis is the basis of the Siemens 42ft ring motor design. However, as the first installations of the 40ft GMDs at Cadia and Collahuasi have shown, evolution is not enough. A proven Finite

    TECHNICAL AND COMMERCIAL BENEFITS OF GEARLESS MILL

    operating cost and reduce availability of ball and SAG mills. Options for variable speed are DC motors, energy recovery systems for wound rotor motors and frequency converter drives. Improvements in power electronics technology and controls have resulted in variable frequency converters that offer high efficiency, high reliability and availability at competitive cost. The first Gearless Mill

    SIMINE Gearless mill drives Siemens

    Whether you’re talking about SAG or a ball mill, space is a delicate issue, especially in the concentrator. That’s why we always design our Gearless mill drives drives to combine maximum performance with limited space requirements. Suitable foundation and adequate ground conditions Since our solutions have a low motor weight, this notice-ably reduces the demands on the foundation and

    Dual Motor Sag Mills vanmorrisonpub.cz

    When mill power is between 18 and 20 MW, which is the current manufacturing limit of ring geared mills [2], either a gearless mill drive (GMD) or a ring geared mill with dual pinion motors can be chosen. Selecting between gearless or ring geared design is mostly dependent on size of the mill and power and speed requirements [3]. This paper takes a closer look at the current manufacturing

    How digitalized gearless drive technology results in

    Traditional ring-geared mill drives have a ring-shaped gear that encircles the mill and drives it through one or two pinions followed by conventional motors. GMDs mount rotor poles directly to the mill body and surround it with the stator ring, incorporating the mill itself into the motor. The necessary torque is transmitted between the GMD motor and the mill via the magnetic field in the tiny

    Commissioning Variable Speed SAG Mill Gearless Drive

    The electric operation and design features of the 11,000 H.P. variable speed SAG mill gearless drive is presented. The function of the frequency-converter, control system drive and lubrication systems are described. An analysis of the harmonic characteristic in the Supply System and Motor is presented, and the dynamic development of the stator current, speed and the magnetic flux in the start

    TECHNICAL AND COMMERCIAL BENEFITS OF GEARLESS MILL

    operating cost and reduce availability of ball and SAG mills. Options for variable speed are DC motors, energy recovery systems for wound rotor motors and frequency converter drives. Improvements in power electronics technology and controls have resulted in variable frequency converters that offer high efficiency, high reliability and availability at competitive cost. The first Gearless Mill

    How digitalized gearless drive technology results in

    Traditional ring-geared mill drives have a ring-shaped gear that encircles the mill and drives it through one or two pinions followed by conventional motors. GMDs mount rotor poles directly to the mill body and surround it with the stator ring, incorporating the mill itself into the motor. The necessary torque is transmitted between the GMD motor and the mill via the magnetic field in the tiny

    MONSAG: A new monitoring system for measuring the

    01/11/2004· High-power gearless drive for a SAG mill. (SAG) mill for copper ore concentration with nominal throughput of 24 000 tons per day. The mill is of the ring-motor type driven by a cycoconverter. Also, it was applied in a 28 × 14 feet SAG mill with 5250 kW, 15 000 tons per day, for gold ore grinding with an load-commutated inverter (LCI) fed drive. The use of the proposed method has

    Literature Review: Gearless Motor Failures A Mill

    10/09/2014· We have been fortunate to undertake detailed mechanical and structural design reviews and audits of all mill types from the five major mill vendors and of ring motors from both the gearless drive vendors. We have also been hired by mine owners to determine the causes of most of the major modern mill and ring motor failures that have occurred since 1998. This gives us a unique

    Ring gear drives huge grinding mill Machine Design

    SAG mills can operate at a fixed speed or adjustable speed through the use of ac synchronous motors or dc motors. They typically range up to 16,000-hp. A secondary, or ball mill, works a lot like

    Siemens Supplies Gearless Drive Systems with 'Frozen

    15/09/2006· 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 drive systems are based on “Simine Mill GD”, a solution developed especially for

    Gearless mill drives Mining Weekly

    The sixty rotor poles each weigh about 1,8 t, which gives a total motor mass in excess of 400 t. The rotor poles are mounted on a flange near the feed end of the mill.

    Grinding Mill Foundations

    23/09/2014· Most of our work since 2000 has been in developing grinding mill foundations to avoid vibration and unacceptable deflections. On a recent project for a plant in Peru, the client was told by the mill vendor that there was no need to do a systems (dynamic) analysis on the mill foundations because the mills on that project were gear driven rather than being driven by ring motors (gearless drives).

    GMD technology for Minera Escondida Mineral Processing

    ABB gearless mill drive, installed 2002 at the Minera Escondida in Chile . ABB announced that it will supply a new 15.7 MW gearless mill drive (GMD) system for a 26 ft ball mill, including transformers, ring motor and a complete electrical room entirely equipped, to Minera Escondida/Chile. The contract was awarded in June 2010 and equipment deliveries are scheduled for May 2011. As of October

    Increasing Availability through Advanced Gearless Drive

    INTRODUCTION THE GEARLESS PRINCIPLE The principle idea behind a gearless drive system is to reduce the number of components and diversity of parts. Especially those components that are at the edge of current manufacturing or power limits are eliminated. The used equipment provides the possibility to scale up and increase the power

    gearless ring motor for sag mill principles Grinding

    » gearless sag mill slip ring motor » what is the difference between a sag mill and ball mill » ball mill and gearless ring motor for sag mill principles; » Learn More. Gearless Drives Siemens. Utah, SAG mill and a 11,200 kW gearless drive for the El Teniente, Chile, SAG mill. with gearless ring motors that have been in

    TECHNICAL AND COMMERCIAL BENEFITS OF GEARLESS MILL

    gearless motor mounted directly onto the mill. In addition, a gearbox can be used to reduce the speed of a high speed motor. This gearbox is then placed between the high speed motor(s) and pinion(s) and the low speed shaft driving the ring gear. Thus, there is the decision between gearless drives and drives using a gear, and, if gear driven,

    Siemens Supplies Gearless Drive Systems with 'Frozen

    15/09/2006· For grinding of the ore, an SAG (Semi Autogenous Grinding) mill and a ball mill will be used. 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

    Gearless mill drives Mining Weekly

    The sixty rotor poles each weigh about 1,8 t, which gives a total motor mass in excess of 400 t. The rotor poles are mounted on a flange near the feed end of the mill. The stator is able to be

    Gearless Mill Drive YouTube

    25/01/2017· ABB ring geared mill drives Duration: 3:07. ABB 49,410 Training Simulator for SIMINE Gearless Mill Drives Duration: 3:35. Siemens 2,763 views. 3:35. Overflow Discharge Ball Mill in

    Mining Grinding and Processing WEG

    For ball and SAG /AG mills with a single or double pinion, motors with squirrel cage rotor are normally used when constant speed and low starting current are required. WEG induction motors (Master Line) are designed with air cooling system (totally enclosed air-air cooling) or water cooling system (totally enclosed air-water cooling), high efficiency and reliability and separate slip ring

    geared vs gearless drive solutions for grinding mills

    Geared vs gearless drive solutions for grinding mills gearless ball mill images grinding mill china preprint 13050 ceecthefuture gearless mill drives grinding abb abbs gearless mill drive system is the most powerful mill drive system in the market to power semiautogenous sag ball and autogenous ag mills. More Details . 90%.

    Grinding Mill Foundations

    23/09/2014· The main aim of a system stiffness analysis is different for geared and gearless mills. In the former, the aim is to stop excessive vibration in the foundations; in the latter, it is to make sure that the ring motor acts as a static structure. Mill design consultants produce stiffness targets that are too conservative. The Cadia and Freeport foundations are excellent examples of what can be done

    GMD technology for Minera Escondida Mineral Processing

    ABB gearless mill drive, installed 2002 at the Minera Escondida in Chile . ABB announced that it will supply a new 15.7 MW gearless mill drive (GMD) system for a 26 ft ball mill, including transformers, ring motor and a complete electrical room entirely equipped, to Minera Escondida/Chile. The contract was awarded in June 2010 and equipment deliveries are scheduled for May 2011. As of October

    gearless ring motor for sag mill principles Grinding

    » gearless sag mill slip ring motor » what is the difference between a sag mill and ball mill » ball mill and gearless ring motor for sag mill principles; » Learn More. Gearless Drives Siemens. Utah, SAG mill and a 11,200 kW gearless drive for the El Teniente, Chile, SAG mill. with gearless ring motors that have been in

    advantages of gearless drives on ball mills

    Following the SAG mill will be two 9,000-hp ball mills, each one 20-ft in diam. and A ring gear drive offers several benefits, such as simplicity, low cost, and ease of and a ring motor (gearless drive), either of which wraps around the mill. Get Price. Increasing availability through advanced Gearless Drive Siemens . The following benefits are achieved when using gearless drive

    Gearless mill drive system in iron ore ­processing

    ABB was recently contracted to supply gearless mill drive (GMD) systems for two 38 foot semiautogenous grinding (SAG) mills at the Serra Azul iron ore mine in Brazil. The Serra Azul mine unit, owned by MMX Mineração e ­Metálicos, an EBX Group company, is located in the iron quadrangle of Minas Gerais, next to Belo Horizonte the heart of the Brazilian mining state. The Tico-Tico and

    Gearless Mill Drive YouTube

    25/01/2017· ABB ring geared mill drives Duration: 3:07. ABB 49,410 Training Simulator for SIMINE Gearless Mill Drives Duration: 3:35. Siemens 2,763 views. 3:35. Overflow Discharge Ball Mill in

    ABB Motor Gearless Mill Drive GMD System YouTube

    08/11/2016· ABB Motor Gearless Mill Drive GMD System

    Gearless mill drives Mining Weekly

    The sixty rotor poles each weigh about 1,8 t, which gives a total motor mass in excess of 400 t. The rotor poles are mounted on a flange near the feed end of the mill. The stator is able to be

    Mining Grinding and Processing WEG

    For ball and SAG /AG mills with a single or double pinion, motors with squirrel cage rotor are normally used when constant speed and low starting current are required. WEG induction motors (Master Line) are designed with air cooling system (totally enclosed air-air cooling) or water cooling system (totally enclosed air-water cooling), high efficiency and reliability and separate slip ring

    moteur sag mill 5800w numismaticaleuven.be

    The working principle of a SAG mill is as follows: the main motor drives the roller to rotate through the transmission device, and the grinding medium performs the SAG mills (semi Know More. Semi-autogenous mills (SAG mills) can accomplish the same size reduction work Standard mill size (m), EGL (m), Geared/Gearless, Std %TCS, Motor hp/kW moteur sag mill 5800w schemas electrique Know

    GMD technology for Minera Escondida Mineral Processing

    ABB gearless mill drive, installed 2002 at the Minera Escondida in Chile . ABB announced that it will supply a new 15.7 MW gearless mill drive (GMD) system for a 26 ft ball mill, including transformers, ring motor and a complete electrical room entirely equipped, to Minera Escondida/Chile. The contract was awarded in June 2010 and equipment deliveries are scheduled for May 2011. As of October

    Lrs Principle Motor Starting LMPForum

    A very basic overview, but the advantage of wound rotor slip ring motor is that, through a LRS u can vary the resistance of the rotor. The advantages are 1. able to manipulate the torque speed curve, allowing u start with a much higher torque. Wound motors are suitable for application with heavy starting duties such as ball/sag mills, crushers etc.

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