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 …
The first gearless mill has recently been put into service in Le Havre, France. This is probably the world's largest cement mill. The cement output is rated at 200 ton/h, and the motor rating is 8700 hp (7400 kW) at 15 r/min. For the first time in the history of tube mills the driving motor has been built directly on the mill, i. e., the mill drum is also the motor …
Due to the huge volume of gearless ball mill direct drive permanent magnet synchronous machine (PMSM), an unwinding modular technology is convenient for its redundant power control, manufacture and maintenance. Several module units are wrapped around the ball mill roller for direct drive. The motor frame adopts a modular structure to …
Gearless mill drives: better by design . GMDs eliminate the need for a ring-gear, pinion, gearbox, coupling, motor shaft and motor bearings, which are used in a conventional mill drive system to transmit the torque from the motor to the mill. Instead, the torque is transmitted through the magnetic field in the air gap between the stator and rotor.
Earlier this year, Siemens AG's Drive Technology Division hosted an online press conference at which it presented the technical specifications of its gearless drive conveyor installation at the new Antapaccay copper mine in Peru—a 5,260-mt/h-capacity overland belt that was commissioned in 2012 and has been operating at production levels since …
gearless ball mill drive - sobrsportservis.cz. Gearless Mill Drives ABB. Antamina Compania Minera Antamina SA Peru Project: One SAG Mill and 3 Ball Mill Drive Systems Capacity: SAG Mill 1000 t/h Ball Mills 1000 t/h Consultant: Bechtel, USA Mill Builder: FFE Minerals, USA Mill Size: SAG Mill 38 feet/11,58 m Ball Mills 24 feet/7,32 m Ore …
the first GMD for a double-rotating ball mill in Carlin, Nevada, meeting a 160 °C heat challenge at the mill shell. GMDs have now been supplied for the world's ... The ABB gearless mill drive (GMD) is the most powerful mill drive system available, combining the highest levels of efficiency, reliability, flexibility and availability. ...
Under the agreement, FL will supply both the mills and thickeners for the project. The equipment includes two gearless SAG mills and two gearless ball mills plus three CCD thickeners, two ...
circuit consists of one SAG mill and three ball mills with a huge total grinding power of more than 50 MW for an average design throughput of 70'000 t/d. It was one of the first …
general, the bigger the mill diameter, the lower are the mill operating and critical speeds. Thus, for larger mills the number of poles will increase. As a result, the number of poles can vary from 48 to 72 poles (Fig. 3.) with typical mill speed requirements of about 10 rpm for larger SAG mills and about 15 rpm for smaller ball mills. Figure 3.
ABB recently won an order worth 44 million US$ to deliver three gearless mill drive systems (GMDs) for a new copper mine to be operated by Kazakhmys PLC (Kazakhmys) in southeastern Kazakhstan. ... mill and two 22 megawatt GMDs for two 28-foot ball mills. Each GMD system includes phase and excitation transformers, a ring motor with its ...
Conveyor systems are responsible for almost 80% of the energy consumption in mines. Gearboxes are maintenance-intensive and their lifetime is relatively short.
The reliability of large diameter, high horsepower ball mill is paramount when large production and minimum downtime is required. The 17 ft. x 56 ft. double compartment ball mill at St. Lawrence Cement Company has the first gearless drive built in North America and has the world's largest hydrodynamic bearings currently built and running.
• 22 MW GMD for 28' ball mill • 28 MW GMD for a 40' SAG mill • 28 MW GMD for 42' SAG mill Whether it is size or an installation at the highest altitude (4600 m.a.s.l.), ABB's …
Looking at economy of scale, new projects consider the use of big mill grinding circuits, where larger power gearless motor drives with cycloconverters in the range around 20 MW are being applied ...
Gearless Ball Mill 24x36 - alsziekte.nl Gearless Ball Mill 24x36. Used ballmills for sale am kingused ballmills for sale am king2 units unused fl 27 x 46 8230m id x 14021m l gearless ball mills with 205 mw 20500 kw gmd motors manufacturer fuller traylor inventory id 6ckt01, gearless ball mill 24x36 ...
Planetary ball mills may be used for mixing, homogenizing, fine grinding, mechanical alloying, cell disruption, small volume high-tech material production, and even colloidal grinding. They are the ideal wet/dry …
the days of the first gearless mills of the '80s, and thru the first 40 ft mills, extensive fabrication kick-off meetings were held, where all processes were discussed. Perhaps because this has become familiar, such is ... Ball Mill External Weld Design Cadia 6.7m 37.8 MPa 14 years Conga 7.26m 38 MPa * - Toromocho 7.82m 51.4 MPa * -
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 …
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 ...
Gearless mill drives GMDs offer ore producers unrivalled availability, efficiency and durability, while reducing operating expenditure and taking advantage of digitalization. ... Larger ball and SAG mills, with higher …
Over recent years, there has been a clear trend towards higher capacity cement production units. Five to ten years ago, 2500 tonnes per day was large. Nowadays in Asia, lines are built for 10000 tonnes per day. The development of ball mill grinding units has not shown the same trend, output and ratings have remained more or less constant …
CHH624 – Gearless Mill Drive Operation and Maintenance Course goal The goal of this course is to provide participants with the required practical knowledge and in-formation on safe operation and maintenance of the gearless mill drive (GMD) system. This training will help to enhance the operation and the maintenance of the GMD in order to ensure
In the past the conventional method of driving large ball mills included some form of speed reducing gear between the higher speed driving motor and the lower speed ball mill. Process developments in the mining and cement industries have increasingly tended toward the use of ever larger ball mills for grinding their products. As the horsepower drive …
In addition, it includes the engineering for two 15.6 megawatt GMD systems for two 26 feet ball mills.This project reinforces ABB s continued good relationship with Newmont, Fluor and , and provides the groundbreaking challenge to engineer the GMD system for the world s first mill above 40 feet in diameter.
next size Gearless Mill Drive, i.e. a 42ft mill. It is a dual design approach considering, on the one hand, the experi-ences Siemens made with Gearless Mill Drive (GMD) instal-lations over the past 40 years and, on the other hand, using computerized design tools calculating the system behavior where experience does not yet exist.
Technologies for extraction and processing, including gearless mill drives (GMDs) and gearless conveyor drives (GCDs), help operators save energy and achieve greater throughput at large mills with higher grinding capacities. When big data is also applied, this lowers costs using preventive and predictive maintenance.
The measured stress ranges at the toes of the welds at the can-to-can flange in the Antamina ball mills were slightly higher than those obtained from the "standard" finite element analysis that was undertaken during the design of the mill. The difference between the measured stresses at Telfer and Antamina is that the liners in …
The world's most powerful gearless mill drives The three gearless mill drive (GMD) systems are the ABB most powerful ever made. The GMD for the 40-foot SAG mill has a power rating of 28 megawatts (MW), and the GMDs for the two 28-foot ball mills have a power rating of 22 MW. They are the largest diameter and most powerful SAG and ball …
FL has been chosen to supply the SAG mills, ball mills and cyclones to Josemaria Resources' copper-gold project in the San Juan Province of Argentina. Approximately DKK110 million of the ...
has been selected to design and supply a 42 ft x 25 ft, (12.8m x 7.6m) 28 MW gearless SAG mill, plus two 26 ft x 42 ft, (7.9m x 12.8m) 15.6 MW ball mills and two VTM-1500-WB VERTIMILLS ® for Newmont Mining Corporation's Yanacocha Conga copper-gold project in Peru. The 42 ft diameter SAG mill is the world's largest and is the first of its kind.
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.
Under the agreement, FL will supply both the mills and thickeners for the project. The equipment includes two gearless SAG mills and two gearless ball mills plus three CCD thickeners, two tailings thickeners and one filtrate thickener. "This is a welcomed order as it underlines our leading position in the copper and gold mining