SAG MOTOR – Leadership by Technology and …
SAG Motor (Spain) S.L., located in the Basque Country, one of the most industrialized areas in Spain, is a high technology manufacturer for permanent magnets synchronous (PMS) gearless traction machines …
gearless ring motor for sag mill principles
For grinding of the ore, an SAG (Semi Autogenous Grinding) mill and a ball mill will be used. For the two oregrinding mills, Siemens is supplying gearless ring motor drive systems supplied with power via cycloconverters. The SAG mill has a diameter of 38 feet ( meters) and will be equipped with a 18 megawatts drive system.
Mill drive selection for semiautogenous grinding mills
mill and gearless mill with a ringmo-tor are shown in Figs. 1 and 2. Early SAG mill designs using gear drives were limited in the amount of power that could be applied to the pin-ions, 3.7 MPa (5000 hp). The exception to this design was the Hibbing taconite operation. It used two4.47 MPa (6000 hp) motors to drive a 1I-m-diam x 4.5-m long (36-ft ...
Gearless Warp Around SAG Mill
Gearless Warp Around SAG Mill. For almost a decade now, very good operating experiences have been gained with a total of 28 gearless ring motor drives in the cement industry, driving tube mills with diameters of 2.5 to 4 meters with drive powers ranging from 3000 to about 5000kW.
Operation of High-Power Cycloconverter-Fed Gearless Drives Under
Ring-motor-driven SAG mills in copper mines have shown frequent malfunctions in the past [3], [6], [7]. The problem is owed to the characteristics of the cycloconverter that feeds the synchronous ...
Current Issues on High-Power Cycloconverter
use of big mill grinding circuits, where large power gearless motor drives with cycloconverters in the range around 20 MW are being applied for semiautogenous (SAG) mills and re-
gearless ring motor for sag mill principles
gearless ring motor for sag mill principles. to Design and Supply the World's Largest SAG Mill in ... Oct 05, 2010· It is situated near the Newmont Yanacocha gold mine, where installed what was then the world's largest singlestage SAG mill, a 32ft x 32ft ( x ) EGL mill, driven by a ABB gearless motor, in 2008. That mill design was also …
Demystifying The Sag Mill: What Is It And How Does It Work?
A SAG mill, or semi-autogenous grinding mill, operates on the principle of autogenous or self-grinding. It uses a combination of ore and grinding media to break down larger rocks into smaller pieces. Understanding the working principles of a SAG mill is crucial for anyone involved in the mining industry. In this section, we will delve deeper ...
The Siemens 42ft gearless mill drive, still an evolutionary …
ring motor FE-Model with the 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 attached at the top and the bottom of the motor housing. These tests provided a detailed frequency response and structural
Gearless mill drives
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.
QdX4 Mill Drive system
system, and one for the OPEN MILL gearing. • A wide variety of lubricants are available. Millmotor/drive High powered efficiency •Dual motor load sharing between two TMMetso QdX4 Mill Drives. • Low speed synchronous or induction. Motor with Variable Speed Drive (VSD) • Dual motor drives are capable of: – Inching and creeping
Gearless Sag Mill Slip Ring Motor
gearless ring motor for sag mill principles. Gearless Warp Around SAG Mill 911metallurgist Gearless Warp Around SAG Mill. For almost a decade now, very good operating experiences have been gained with a total of 28 gearless ring motor drives [randpic] Gearless mill driv +86 [email protected] Quick Search: SERVICEY. Home; …
The engineering and process effects of choosing a …
Such plots for an example mill, the SAG mill at Cadia (described by Dunne et al., 2001) is shown in Figure 3. Any time a process line (green) touches or exceeds the corresponding motor limit (the red or blue lines), the motor is at risk of tripping due to high current, depending on the conditions. Safe operating of a mill and motor means that
GMDs: the driving force behind sustainable mill operations
Gearless mill drives (GMDs) constitute a compelling alternative to traditional ring-geared mill drives (RMDs) in such environments. Both drive types can be used to power large semi-autogenous (SAG), ball and autogenous mills, but GMDs are proven to offer superior availability, uptime and efficiency. When the first GMD was …
ABB Library
Conga: The world's first 42-foot diameter 28 MW gearless SAG mill. ID: ... Maarten van de Vijfeijken 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. ...
Making remote mines and low ore grades economical and …
The six ABB GMDs, which are the most powerful mill drive systems on the market are all now in continuous operation. Two 28 MW gearless mill drive systems (GMDs) are operating in the mine's 40 foot SAG mills and four 16.5 MW GMDS are employed in 26 football mills along with associated control systems.
Commissioning Variable Speed SAG Mill Gearless Drive
The SAG Mill Drive is mainly formed by a 11,000 HP. Ring Type Synchronous Motor of double winding, fed by two Three–Phased Cycloconverters. The rotor has salient poles without dumping windings and it consists of 72 poles. The cycloconverters work in the out-of-circulation current mode and they are connected to a …
gearless ring motor for sag mill principles
ABB's scope of supply consists of three complete GMD systems including transformers, ring motors and E-house. One 26 megawatt GMD system will be installed for a 40-foot diameter SAG mill, while two 20.5 megawatt GMD systems will be installed to drive two 27-foot diameter ball mills.
CONGA: THE WORLD'S FIRST 42 FOOT DIAMETER 28 …
1 CONGA: THE WORLD'S FIRST 42 FOOT DIAMETER 28 MW GEARLESS SAG MILL T. Orser1, V. Svalbonas 2 and *M. Van de Vijfeijken 3 1Newmont Mining Corporation 10101 East Dry Creek Road Englewood, CO 80112, USA 2Metso Corp. 2715 Pleasant Valley Rd.
MONSAG: A new monitoring system for measuring the load filling of a SAG
1.. IntroductionLower ore grades, variable grindability, mineral handling and economics state a challenge for current mining operations. Looking for economies of scale, new mining projects consider big mill grinding circuits, with large power gearless motor drives (GMD) fed by cycloconverters in the range around 20 MW (Sams et al., …
TECHNICAL AND COMMERCIAL BENEFITS OF GEARLESS …
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 …
SAG Mill Components
Another solution is to use the so-called "gearless drive." A cyclo-converter reduces the power frequency and a synchronous motor is either wrapped around shell or mounted on a trunnion extension. This makes the mill essentially a part of a synchronous .motor rotor with the stator in its usual position around the rotor.
Catalogue – SAG MOTOR
SAG Motor, Leading the Elevation Gearless Traction Machines Industry through design, Technological Innovation and High Quality Production. CSAG-MV. Permanent Magnets Synchronous (PMS) Gearless Traction Machine ... SAG MOTOR (SPAIN) SL. Paseo Egiburuberri Nº13-O-U 20100 - Errenteria - Gipuzkoa (SPAIN) +34 943 528 394;
Remote Diagnostic Services for Gearless Mill Drives
autogenous grinding (SAG) mills, or ball mills. The most important components of a GMD are the following ones: The stator is a massive electro-mechanical structure built around the grinding mill, hence its alternative names "wrap-around motor" and "ring motor" (see Figure 1). Its purpose is to
Design and dynamic behavior of large Ring Motors for …
Ring Motors vary the speed of the mill by changing the sta-tor frequency. A cycloconverter provides variable frequency for start, stop and speed variation during operation. Figure 1: Ring Motor of the 38' SAG-Mill of Rio Paracatú Mineraçao; Brazil 3 Design Verification To assure reliability of operation the mechanical design must be verified.
ABB buys ring motor business to boost its gearless mill drives
30 July, 2013. ABB is buying Alstom's ring motor business to enhance its gearless mill drive (GMD) activities. The business, based in Bilbao, Spain, has about 120 employees and achieved a turnover of €57m in 2012/13. It will become part of ABB's Process Automation division. The financial details of the deal have not been revealed.
gearless ring motor for sag mill principles
The main options are single low speed motors Siemens expands mining portfolio to include gearless drive system,2010828· Siemens is now able to provide to mining companies a gearless drive system for SAG mills with a tube diameter of 42 feet. This enables throughput to be . gearless ring motor for sag mill principles
Increasing Availability through Advanced Gearless Drive …
INTRODUCTION – THE GEARLESS PRINCIPLE ... Figure 4 - 38ft SAG-Mill with GMD in installation phase; rotor poles bolted onto the mill flange and stator ... The Gearless Mill Drive system consists of the ring motor with its feeding cyclconverter, pre-installed in an E-house. It also includes the excitation rectifier, the automation system (for ...
Lrs Principle
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, …
gearless ring motor for sag mill principles----About Us
SAG Mill Grinding Circuit Design - 911metallurgist - gearless ring motor for sag mill principles. Gearless drives (ringmotors) have been used on tumbling mills for several decades. marcy mill shells - zygomat.fr 13.5 x 4 ft (4 x 1.2 m) Marcy SAG mill with 300 HP - 13.5 x 4 ft shell - Originally designed for dry grinding - removed, disassembled, and in …
ABB Library
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 …