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 erected or are in fabrication phase. Los Bronces suffered a Frozen Charge in their expansion plant Confluencia on 10th September 2012 at its Ball Mill No. 2.
Gearless mill drive system (GMD) 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 (SAG), ball and autogenous (AG) mills, This 'workhorse' for grinding operations combines a robust ...
ABB was recently contracted to supply gearless mill drives (GMDs) for six ball mills and twin-drive systems for eight high pressure grinding rolls (HPGRs) at the Cerro Verde copper mine in Peru Archive > Equipment
Two 28 MW gearless mill drive systems (GMDS) are operating in the mine's 12-metre SAG mills and four 16.5 MW GMDS are employed in 26 ball mills along with associated control systems. "Gearless mill drives are the 'workhorses' for grinding operations which are at the heart of any mine.
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 ...
what is lrs in ball mill - verhuur-doms.be. Advantages of SER drives for SAG mills Friday, December 19, 2014 For large mills requiring variable speed, the wound rotor motor and SER drive are economical for a total rating of approximately 2MW to 16MW. Above 16MW, the gearless drive (cyclo-converter) is typically used because gearboxes and pinion ...
Sag Mill Synchronous Motors. Prompt : Caesar is a famous mining equipment manufacturer well-known both at home and abroad, major in producing stone crushing equipment, mineral separation equipment, limestone grinding equipment, etc. large synchronous motor. The poles of ... stage mill (no ball mill after the SAG mill) and has a diameter and ...
Specific areas of responsibility include but not be limited to, maintenance of the primary gyratory crusher, connecting conveyor belts, secondary pebble crushers, a 40' gearless motor drive SAG Mill, two Ball mills, all equipment in the concentrator, and downstream to the tailings area, pumps and pipelines.
Gearless mill drives are a well established solution for grinding applications in the minerals and mining industries. The paper describes the functionality and technical features of such drive systems as well as their advantages compared to other drive solutions. Due to the variable speed operation the grinding process can be optimized for ores with varying grinding properties.
Variable Speed Drives. Variable speed drives are not new. Many have been used in the cement industry on mills drawing up to 6,525 kW (8,750 hp). There are 39 gearless drive installations worldwide, but only one in North America (St. Lawrence Cement). Recently both Afton and Lornex in British Columbia installed variable speed dc drives on wet ...
Grinding mill drives play an important role in the mining industry. ... significant advantages in terms of productivity and efficiency ... R. A. Errath, " 15 000-HP gearless ball mill drive in ...
The Los Bronces SAG mill drive is rated at 22 MW and the ball mill drives at 16.4 MW. • A €20-million order on December 10, 2008 from Compania Aurifera Brisas del Cuyuni C.A., a subsidiary of Gold Reserve Inc., for gearless mill drives for two 36-ft-diameter SAG mills at the Brisas gold-copper project in Venezuela.
ABB announces that it has successfully completed the commissioning of a 13.4 MW gearless mill drive (GMD) system for the Hipogeno project. ... Chile´s Minera Los Pelambres Ltda. is operating a new SAG mill and a new ball mill equipped with gearless drives systems by Siemens. ... the JAWMAX 200 ® also offers all the advantages of SBM's mobile ...
Errath, R., 2006, "The Gearless Mill Drive, the Work Horse for SAG and Ball Mills", SME Conference, St. Louis. Protection and Supervision Systems for Gearless Mill Drives M Ahrens
Gearless mill drives are a well established solution for grinding applications in the minerals and mining industries. The paper describes the functionality and technical features of such drive systems as well as their advantages compared to other drive solutions. Due to the variable speed operation the grinding process can be optimized for
Gearless mill drives are a well established solution for grinding applications in the minerals and mining industries. The paper describes the functionality and technical features of such drive systems as well as their advantages compared to other drive solutions.
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 mills ...
For gearless drives, motor torque output at the maximum desired operating mill speed and ball charge volume has to be determined. Primary Mills: Torque Output (by Motor) vs Torque Demand (by Mill) For the purposes of this discussion, "drive speed" refers to the output speed of any mill drive system, whereas that of
ABB announces that it has successfully completed the commissioning of a 13.4 MW gearless mill drive (GMD) system for the Hipogeno project. ... Chile´s Minera Los Pelambres Ltda. is operating a new SAG mill and a new ball mill equipped with gearless drives systems by Siemens. ... the JAWMAX 200 ® also offers all the advantages of SBM's mobile ...
Cobre Panama is using six ABB Gearless Mill Drives (GMDs) at its recently commissioned copper concentrator in Panama. Two 28-megawatt (MW) GMDs are operating on the 40-ft SAG mills, and four 16.5-MW GMDs are employed on 26-ft …
Managing and monitoring gearless mill drives. Posted by Matrix on 15th December 2014. ABB has re-packaged its proven and tested service offering for gearless mill drives (GMD) remote diagnostic services with the launch of a newly created product package of two modules, GMDbeatTM and GMDfitTM. The basic module, GMDbeat, covers ABB's ...
Share to: ① Effective to reduce the resistance of the generator torque, while the wind turbine and generator have a better matching characteristic. ② Smoother and more stable choice. ③ With the best NdFeB Permanent Magnet, high-grade pure copper winding, the generator can produce power stably and high efficiency.
Advantages of SER drives for SAG mills GoHz Dec 19 2014 · So at say 85 speed 15 of the motor rated power is returned from the rotor to the supply At a hyper synchronous speed the SER drive feeds power into the motor rotor allowing it to run faster than synchronous speed So for a fixed torque and higher speed the power obtained from the motor is higher than the motor …
The gearless design for drive systems – first used in a mill in 1969 and then a belt conveyor ... Gearless drives also offer an energy-efficiency advantage. ... a 29 MW drive for the 40-foot SAG mill and two 22 MW drives for the 28-foot ball mills. Get Price.
Operational advantages: Simplification of the mill drive... Get Price SIMINE MILL With Siemens' Gearless Drives you gain the advantage over the competition and .... Whether SAG or Ball Mill, space is a sensitive subject, especially in the con-. Get Price Design and Optimization of Gearless Drives using Multi ... - DCAMM
Mill speed influences the power draw in two ways: on the one hand, mill power is the lineal product of the mill rotational speed and the torque applied, so there is a lineal dependence; on the other hand, the centreof gravity of the charge is shifted withspeed, creating a non-lineal dependence. The
Gearless mill drives Gearless mill drives (GMD) for semiautogenous (SAG), ball and autogenous (AG) mills eliminate the typical mechanical components of the drive train (shaft, gearbox, pinion and ring gear). In 1969, ABB delivered the first GMD ever, which is still in operation today. The upper limit of the power range today is about 35 MW.
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
Gearless mill drive. The limitation of an RMD system was overcome by ABB when it introduced the first gearless mill drive (GMD) in 1969 for the cement industry. ABB introduced the first GMD into the minerals industry in 1985 and since then it has become the de facto standard equipment for mines with larger throughput requirements.
ball mill manual pdf. Ball Mill Maintenance Manual Pdf - two-do.nl. Ball Mill Maintenance Manual Pdf. Page 1 this f document is bookmarked operating instructions and parts manual variable speed turret mill model jtm-4vs shown with optional accessories x-axis table powerfeed and dro walter meier manufacturing inc27 new sanford road lavergne, tennessee 37086 part …