August 18, 2011 - ABB won an order from Newmont Mining Corporation to deliver three gearless mill drive (GMD) systems for installation at Yanacocha s Conga copper/gold project in Peru. It is a follow-up order from the contract for the GMD system engineering that ABB received in August 2010.
Gearless mill drive system (GMD) Maximum availability and productivity Go gearless to meet your business objetives by exceeding standard availability targets in your grinding operations.
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 mill and motor) including HMI, monitoring and diagnostic system, MCC's (for mill and drive auxiliaries), differential
The Siemens Drive Technologies Division is delivering an Integrated Drive System for two new mills for the Toromocho mine in the Peruvian province of Yauli. The order comes from Minera Chinalco Per S.A., a subsidiary of Aluminum Corporation of China (CHINALCO). In future, two gearless mill drives and Sinamics cycloconverters will be used in the ...
Acerca de. Master's student of control and automation engineering. Electronics engineer. CIP 246576. Trainee at ABB Switzerland. Gearless Mill Drive - Electrical. System 800xA. Experience in commissioning and start-up of polymetallic plants, GMDs, process control, electrical systems, LV drives, instrumentation and third party integration.
In 2014 ABB completed commissioning of three variable-speed mill drive systems at Thompson Creek Metal's Mount Milligan open-pit mine – making its grinding circuit one of the most advanced and powerful in North America. Article Article PDF file_download 0,42 PUBLIC Remote diagnostic services for gearless mill drives
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 gearless mill drive 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 …
The gearless drive system includes four low-speed synchronous motors (4.4 MW, 66 rpm) and the associated SINAMICS SL150 converters. The operators profit from high availability and less downtimes as well as from reduced operational and maintenance costs.
The sealing system of the SIMINE Gearless Mill Drives is a proven design incorporating extremely low mainte-nance with ingress protection that is rated at IP 55, and complemented by a purpose-built rain shield. The outdoor version of the SIMINE Gearless Mill Drives allows omitting the concentrator building, a considerable saving of invest-
A cycloconverter-fed gearless mill drive is a drive system that has hardware and software protection functions to protect the equipment in case of abnormal operating conditions, malfunctions or ...
A cycloconverter-fed gearless mill drive is a drive system that has hardware and software protection functions to protect the equipment in case of abnormal operating conditions, malfunctions or failures. For demanding applications in the mining industry, protections systems need to be reviewed considering special or abnormal operating ...
The $1.2 billion expansion, which saw throughput rise from 60,000 t/d to 120,000 t/d, involved the addition of two new thyssenkrupp-made ball mills, with ABB providing the gearless mill drives (GMD) technology. This came on top of the 33 mills the miner already had up and running as part of the existing 60,000 t/d plant at the operation.
CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Abstract—A cycloconverter-fed gearless mill drive is a drive system that has hardware and software protection functions to protect the equipment in case of abnormal operating conditions, malfunctions or failures. For demanding applications in the mining industry, protections …
Gearless mill drives are becoming the drive system of choice on large AG, SAG and ball mill installations for new projects and existing mill expansions. At least 31 GMDs have been ordered from Siemens and ABB, for example, over the past year or so for mills ranging up to 40 ft in diameter and with drive power ratings up to 28 MW.
By modernizing its gearless mill drive with the new Sinamics SL150 converter, cement manufacturer Rohrdorfer Group has increased the availability of its plant without the need to interrupt on-going production. The world's first ring motor from Siemens has been doing stalwart service for over 45 years at the cement works in Rohrdorf, Bavaria.
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.
The drive system on ABB GMDs - including the gearless motor - does not require any lubrication, thus reducing maintenance costs. The GMD is designed to run the mill with variable speed, in both directions of rotation, meaning the grinding process can be optimised at any time during the mine's life.
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.
Simine Mill GD provides a gearless drive with no mechanical parts between the motor and the mill. Stepless adjustment of the rotational speed aids optimum start-up and means that the system can be controlled in accordance with the varying demands of the material in the mill. This reduces wear, maintenance and energy consumption.
The GMD eliminates all mechanical components of a conventional mill drive system. By mounting the rotor poles directly onto the mill, the mill itself becomes the rotor of the gearless motor.
Fig. 4. Air gap monitoring system in a gearless drive. Gearless Drives for grinding mills. Gearless Drives are well proven stateof- the-art technology for large grinding mills. Siemens, the company that introduced Gearless Mill Drives (GMD) to mining industry started up its first GMD on a ball mill in Norway in 1980.
The ABB System 800xA distributed control system integrates all the automation systems—process, power distribution, gearless mill drive, motor and conveyor, pipeline and port—into a common control environment, and provides interfaces with the plant management and maintenance systems.
Executed the practical part of the "Field Service Certification program for Gearless Mill Drive (GMD) System" on Panama project as Junior commissioning engineer, between March to May 2019. Performed following activities together senior engineer Michel Garnier: • Cold & hot Commissioning tasks. • Fine Tuning tasks.
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 about 6 Hz.
Gearless pendulum roller mill. Patented Direct Drive system of the mill with multipole synchrone motor; Simplified mill design, eliminating e.g. gearbox, couplings and oil lubrication; Variable grinding speed for optimized process conditions; Maintenance. Drive and mill rotor with pendulums, are completely removable in one step for efficient ...
gearless mill drive system. ABB's delivery included one gearless mill drive system GMD for a 40feet semiautogenous mill and two lowspeed dual pinion ringgeared mill drive systems RMDs for two 26feet ball mills making Mount Milligan's grinding circuit one of the most advanced and powerful in North America Read more.