2009 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 …

y el mundo, siendo los Gearless Mill Drives los gigantes de la minería. A pesar de que el sistema no es una novedad, ya que ABB en 1969 creó esta solución y puso en operación la primera unidad en Le Havre, Normandía (Francia), hoy las nuevas tecnologías y las necesidades de mercado de mayor producción en menor

No mill or motor vendor, mill design company or independent consultant can truthfully claim this advantage. So let's look at the observations in Svalbonas' paper on gearless drives in [1]. The structural design of mills is much simpler than the structural design of ring motors. Most of the complexity in a mill is related to bearing design.

Fig. 1, General scheme of a Gearless Mill Motor drive [24]. of the airgap is in the range of 15-17 mm. A tolerance of. +/- 3 mm is consi dered for setting alarm s and protections. The motor is fed ...

Eleven 5MW gearless drives with synchronous motors running at low speeds (50-60rpm) drive three conveyors; two with four motors each and one with three. Two 20MW conveyors transport the ore from the open pit operation to the surface, overcoming an elevation change of around 1,300m, while the second conveyor feeds into a slightly smaller, 15MW ...

BRIEF OVERVIEW GEARLESS MILL DRIVES IN THE MINING INDUSTRY The gearless motor (also called wrap-around motor or ring motor) is a very large synchronous motor. The poles of the motor are directly installed on a pole flange on the mill shell; this means the mill body becomes the rotor. The stator of the gearless motor is then wrapped around …

ABB's Marcelo Perrucci explains how Gearless mill drives, digitalization, AI and analytics are transforming grinding operations at mines worldwide. White paper. White paper. ... Paper presented at MAPLA 2009 by T. Ravani vonOw The grinding process is a significant part of the ore winning process.Selection of the drive solution for the mill ...

Gearless Mill Drives - Cbmua. EN. English Deutsch Français Español Português Italiano Român Nederlands Latina Dansk Svenska Norsk Magyar Bahasa Indonesia Türkçe Suomi Latvian …

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

Eleven 5MW gearless drives with synchronous motors running at low speeds (50-60rpm) drive three conveyors; two with four motors each and one with three. Two 20MW conveyors transport the ore from the open pit …

With this cement installation, it is possible to find the optimum production by changing the following: a) Mill speed from 13.0 rpm to 14.5 rpm (68.4% to 76.31% of critical speed). b) Diaphragm opening (in division head from open to closed position). c) Auxiliary fan blade speed from 50 to 150 rpm. d) Feed of clinker, gypsum and gypsum tailings.

Mill operators face the twin challenge of increasing production to meet demand for commodities and declining ore grades. Marcelo Perrucci, Global Product Line Manager, Grinding, ABB, explains why gearless mill drives (GMDs) are increasingly becoming the solution of choice for high-capacity mills. Published in Global Mining Review - October 22.

Project: One SAG Mill and 3 Ball Mill Drive Systems Capacity: SAG Mill 4583 t/h Ball Mills 4583 t/h Consultant: Bechtel, Chile Mill Builder: FFE Minerals, USA Mill Size: SAG Mill 38 feet/11,58 m Ball Mills 25 feet/7,62 m Ore processed: Copper Ore Drive Rating: SAG Mill 19,4 MW / 9,31 rpm Ball Mills 13,43 MW / 11,5 rpm Award of Contract ...

Page 1 and 2: 2009 Gearless Mill Drives Machinery; Page 3 and 4: Marsh However, from the machinery b; Page 5 and 6: ; Page 7 and 8: SIMINE Mill Gearless Drive Performa; Page 9 and 10: SIMINE Mill Gearless Drive Experien; Page 11 and 12: CODELCO Chuquicamata, 2 GD 8210kW, Page 13 and 14: …

Conveyor systems are responsible for almost 80% of the energy consumption in mines. Gearboxes are maintenance-intensive and their lifetime is relatively short. ABB is removing the gearbox, replaced with a permanent magnet motor technology. Benefits are manifold: reduced maintenance and risk of failure, reduced energy consumption by 6-10%, +10 ...

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, …

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 Havre in France. In the first few years, the GMD was only used in the cement industry. The GMD is also known as …

The QdX4TM 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 QdX4TM Mill Drive features internal torque splitting capability transmitting motor input power to the pinion shaft and equally dividing into two mill pinions.

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 …

Gearless Mill Drives Machinery Risk Solutions Practice 2009 Matt Dugalic P.Eng., MARSH – MRSP Risk Consultant, VP Kurt Tischler Dipl.-Ing., Siemens…

drives necessitate current and voltage deratings which ac-cumulate to power derating factors; e.g. of up to 0.60 for the reference project Antapaccay at 4,200 meters above …

The QdX4™ Mill Drive features internal torque splitting capability transmitting motor input power to the pinion shaft and equally dividing into two mill pinions. This type of torque splitting gear box technology has been in operation since the early 1960's. We have rearranged the drive architecture in order to apply high powered ...

Gearless mill drives As was mentioned above, a gearless mill drive constitutes both an important part, but also one of the most critical elements of a concentrator or a cement plant. Their purpose is to ensure the continuous rotation of specific types of tumbling mills, more specifically autogenous grinding (AG) mills, semi-

Gearless Mill Drives Machinery Risk Solutions Practice 2009 Matt Dugalic P.Eng., MARSH â MRSP Risk Consultant, VP Kurt Tischler Dipl.-Ing., Siemens…

Mills, gearless mill drives, insurance INTRODUCTION Mining is considered a complex, energy intensive industry, as seen by the global insurance market. The complexity of the industry from the insurer's perspective is based on the broad scope of loss potential, or risk. Risk is present in many different aspects of mining, including ...

19.3MW Gearless Mill Drive at the Peñasquito site in Mexi-co. Up to forty acceleration sensors have been placed inside ... In March 2009 Collahuasi's specialists tested Siemens coils with VPI-insulation in their HV-laboratory at 4250 m above sea level. Figure 5: Partial Discharge measurement of a Siemens GMD stator coil at ...

2 GEARLESS MILL DES 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 ...

Whether it is size or an installation at the highest altitude (4600 m.a.s.l.), gearless mill drives (GMDs) are well positioned to contribute to the building of larger and ever more powerful mills. GMDs are the grinding solution of choice in challenging environments like high altitudes or varied climates in remote locations. By eliminating bolt ...

4 RING-GEARED ML DRIVES RMD PLUS Frozen charge detection The mill controller detects frozen charge by analyzing the mill's angle and dynamic torque during starting. A dedicated algorithm can even detect smooth cascading. The mill stops automatically – preventing frozen charge to drop or being accelerated to higher speed. Frozen charge …

one 26ft, 16 MW Ball Mill in Zambia, all three mills put in operation in 2008, as well as Los Bronces, Confluencia in Chile equipped with one 40ft SAG Mill of 22 MW and two 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

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 …

This paper describes improvements in the protection system implemented in the gearless mill drives currently operating at the Laguna Seca concentrator of Minera Escondida Ltda. The background of the new protection functions, related analysis and solutions are explained and experimental results are presented showing their operation.

Gearless mill drives As was mentioned above, a gearless mill drive constitutes both an important part, but also one of the most critical elements of a concentrator or a cement plant. Their purpose is to ensure the continuous rotation of specific types of tumbling mills, more specifically autogenous grinding (AG) mills, semi-

Detail of Training Simulator: drive control section with the SINAMICS controllers and the interface board to power section. Your challenge: Maximum operations at the bottleneck. The Gearless Mill Drive (GMD) is potentially the most critical bottleneck in the mine production process. Each hour of downtime can result in a heavy financial loss.

speed (expressed as mill speed in the case of gearless mill drives, (GMDs), and shell liner/lifter wear so that the ex-pected range of operating conditions can be accommo-dated once the mill diameter has been set. In this respect, the ratio of mill diameter to mill length EGL is important as it affects selection of the rated speed. The progress of