Ball mill driven with gearless mill drive
Ball mill driven with gearless mill drive. Abstract: This paper introduces how PT Semen Bosowa/Indonesia considered the installation of a cement plant gearless …
Electromagnetic design and thermal analysis of module …
With the large-scale development of the ball mill, the direct-drive gearless ball mill has emerged, eliminating the limitation of the transmission torque of large gear. However, it is difficult to process, transport, install and maintain the gearless ball mill because of its vast volume, and the coils cannot be decoupled freely.
ABB Marks 10 Years Since Return to Mining Equipment …
Summary. ABB Marks 10 Years Since Return to Mining Equipment Factory with Manufacturing Momentum. ABB is set to celebrate its 10 th anniversary since it reacquired ownership of the gearless mill drive system business this week. The technology leader marks the milestone with record output in the last calendar year and a high for …
FL to supply mineral processing equipment to …
FL will deliver the three gearless SAG mills, three gearless ball mills and cyclones to the site by late-2023. The OEM was chosen to deliver the …
Increasing Availability through Advanced Gearless Drive …
Siemens' gearless drive technology of 99.46 to 99.71% - as confirmed by real operational data from the Antapaccay mine in Peru. It was the first plant worldwide to use gearless drives for both applications. KEYWORDS Gearless Mill Drives, Gearless Conveyor Drives, Availability, SAG Mill, Ball Mill, Overland Conveyor, Antapaccay 15
FL to supply ball mills, SAG mills and thickener
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 ...
TECHNICAL AND COMMERCIAL BENEFITS OF …
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.
US3272444A
United States Patent N.Y., assignors to General Electric Company, a corporation of New York Filed Aug. 28, 1963, Ser. No. 305,076 6 Claims. '(Cl. 241-176) Our invention relates to a direct driven rotary mill apparatus of the low speed, high torque type, and in particular, to the means for mechanically coupling the mill to the rotor of the driving motor and the …
Mining Mill Braking Technologies
System Description. Figure 2: Sessego Mill Braking System. A typical braking system consists of one or more brake calipers, mounted onto two pedestals, one each side of the mill, symmetrical about the horizontal mill centerline. Brake operation is controlled by a hydraulic power pack designed to meet each individual application.
Frozen charge detection and automatic loosening with …
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
Flexible milling and grinding solutions that last | FL
With years of experience in the cement and mining industries and over 3000 mills sold worldwide, FL continues to develop its range of efficient milling and grinding solutions. ... Our ball mills are the most robust design in the industry, available with either geared or gearless drive arrangements. The cost-effective FT Series mills are ...
FL to deliver three SAG mills, three ball mills and
FL will deliver the three gearless SAG mills, three gearless ball mills and cyclones to the 150,000 Mtpd site by late-2023. FL was chosen to deliver the equipment due to the high ...
Concepts of Gearless Ball-Mill Drives
Concepts of Gearless Ball-Mill Drives. Abstract: 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 ...
(PDF) Technical evaluation and practical experience of high …
Even ball mills have a power larger than develop the field-oriented control required to adjust speed 10 MW. This is why they have an important impact on energy and torque. ... "15 000-HP gearless ball mill drive in cement-why not!," Reliability and Power Quality. He is coauthor of IEEE Trans. Ind. Appl., vol. 32, no. 3, pp. 663–669, May ...
SIMINE 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 …
Mill drives
The gearless ball mill drive can be designed in two basic arrangements. Fig. 8.13. shows an arrangement with the motor rotor supported by a strengthened and extended mill trunnion shaft and bearing. This arrangement retains maximum accessibility to both mill and motor. Fig. 8.14. shows a wrap-around construction with the motor rotor supported ...
Electromagnetic design and thermal analysis of module …
With the large‐scale development of the ball mill, the direct‐drive gearless ball mill has emerged, eliminating the limitation of the transmission torque of large gear. However, it is difficultto process, transport, install and maintain the gearless ball mill because of its vast volume, and the coils cannot be decoupled freely.
to Design and Supply the World's Largest SAG Mill in …
The Conga project is located approximately 560 miles (900km) north of Lima, at an altitude of 13,400ft (4100m) above sea level. It is situated near the Newmont Yanacocha gold mine, where installed what was then the world's largest single-stage SAG mill, a 32ft x 32ft (9.75m x 9.75m) EGL mill, driven by a 16.5MW ABB gearless motor, in 2008.
Gearless drive systems for belt conveyor and grinding mills
The SAG mill was fitted with a gearless drive with a power rating of 24 MW and the ball mills were also fitted with gearless drive systems, each providing 16.4 MW. Also included in the scope of ...
Mining Engineering Online
ABB successfully commissions six gearless mill drives at Panama's newest mine Press release. October 25, 2019 ... which are the most powerful mill drive systems on the market for semi-autogenous (SAG), ball and autogenous mills, have been installed since late last year and are all now in continuous operation. Two 28 MW gearless mill drive ...
Concepts of Gearless Ball-Mill Drives
Concepts of Gearless Ball-Mill Drives. Abstract: In the past the conventional method of driving large ball mills included some form of speed reducing gear between the higher …
Chapter 01
Go Gearless. Gearless Mill Drives. Robust. Available. Efficient. Compatible Good reasons to go gearless. In minerals processing, profit requires throughput. Grinding low-grade ores calls for Robust high volume mills and round-the-clock Our GMD is strong, rigid and round. The reliability. High power, huge capacity, and brute tremendous forces involved with …
15000-HP gearless ball mill drive in cement-why not!
Significant energy and cost economies can be achieved with a gearless mill drive working with a ball mill in these upper power ranges. This prospect should also be of interest to …
Gearless Ball Mill Operation
The optimum operation was found after 3000 hours running. The capacity was some 10% over the guaranteed capacity. This large mill 17′ x 56′ is not less efficient than a smaller mill 10′ x 28′ used in comparative tests. Maintenance of "Gearless Drive" Mill. The lubrication system. This depended on gravity feed of oil to the bearing pads.
Gearless Mill Drive Sales Rev Up to Meet Demand
The SAG mill drive package is rated at 21 MW; the ball mill drives at 16.4 MW. • An order in May 2008 valued at more than €20 million from Aurox Resources Ltd. to supply gearless drives for a 34-ft-diameter, 14-MW SAG mill and a 26-ft-diameter, 17-MW ball mill for an iron ore project in Western Australia.
Annular permanent magnet gearless ball mill direct driving …
The invention discloses a kind of annular permanent magnet gearless ball mill direct driving motor, belong to ball mill and drive equipment technical field.This direct driving motor includes stator and rotor, and wherein, rotor is fixedly mounted on the outer surface of ball mill barrel by sectional type rotor core, and concentric with ball mill barrel；Stator is …
Toromocho – A giant in high-altitude mining
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 …
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 …
Gearless Mill Drives
Antamina Compania Minera Antamina S.A. 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 processed: Copper/Zinc Drive Rating: SAG Mill 20,1 MW, 9,23 rpm Ball Mills 11,2 …
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