Go gearless to meet your business objetives by exceeding standard availability targets in your grinding operations. ABBs 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, servicefriendly and fit for purposeGet Price
INCREASING AVAILABILITY THROUGH ADVANCED GEARLESS DRIVE TECHNOLOGY M. Combes1, C. Dirscherl2, T. Roesch3 1Glencore Xstrata Av. Apoquindo 3885 Santiago, Chile 2Siemens Industry Inc. 7810 Shaffer Parkway Littleton, CO 80127, United States of America
Go gearless to meet your business objetives by exceeding standard availability targets in your grinding operations. ABBs 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, servicefriendly and fit for purpose
method of driving SAG mills, Ball mills and other rotating elements. Several thousand grinding mills have been manufactured and have been in operation for the last century. The gearless drive came into the minerals industry in 1980 and as per their reference lists, Siemens have approximately 60 installations and ABB have approximately 85.
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 worlds largest hydrodynamic bearings currently built and running.
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 mill and its drive system are still in service. Today, GMDs are mainly used for SAG mills between 36 and 40 feet 10.7 to 12.2 m and ball mills from 24 to 28 feet 7.3 to 8.5 m.
Ball Mills 1000 th Consultant Bechtel, USA Mill Builder FFE Minerals, USA Mill Size SAG Mill 38 feet11,58 m Ball Mills 24 feet7,32 m Ore processed CopperZinc Drive Rating SAG Mill 20,1 MW, 9,23 rpm Ball Mills 11,2 MW, 11,38 rpm Award of Contract March 1999 Start of Operation June 2001 ABBs scope of supply Four complete Gearless
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 mine39s 40 foot SAG mills and four 16.5 MW GMDS are employed in 26 football mills along with associated control systems.
Gearless Ball Mill Malaysia wwprojekt. china ball mill with hydraulic gearless drive. versatile system based on standard modules the fl ball mill is designed for grinding abb s gearless mill drive system is the most powerful mill drive system in the market to maize mill, grinding mill, disc mill, tf tf tf china shaft suppliers in south africa
Siemens has provided about 80 SIMINE Gearless mill drives to the mining industry since 1980. In these thirtyplus years, SIMINE Gearless mill drives have accumulated a combined total of over 500 years in operation time and this number is steadily growing even as you read this. This is a benchmark we are immensely proud of. Your benefits
For both wet and dry ball mills, the ball mill is charged to approximately 33 with balls range 3045. Pulp crushed ore and water fills another 15 of the drums volume so that the total
ABBs scope of supply consists of three complete GMD systems including transformers, ring motors and Ehouse. One 26 megawatt GMD system will be installed for a 40foot diameter SAG mill, while two 20.5 megawatt GMD systems will be installed to drive two 27foot diameter ball mills.
SAN CRISTOBAL Bolivia BallMill 22 7,830 2007 EL TENIENTE Chile SAGMill 38 19,400 2003 EL TENIENTE Chile BallMill 24 11,186 2003 SIMINECIS Mill gearless drives References in operation 33 in fabrication or installation 21 project stopped 4 order cancelled 6.
plied gearless drives for two 36foot ring motors, developing a 12,000 kW gearless drive for the Kennecott, Utah, SAG mill and a 11,200 kW gearless drive for the El Teniente, Chile, SAG mill. In a continued call for larger, even more powerful drives, Siemens kept pace. In 1996, Freeport ordered the first gearless
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.
ABBs 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 Milligans grinding circuit one of the most advanced and powerful in North America.
Autogenous AG grinding mills involve no grinding media as the ore itself acts as the grinding media. Our ball mills are the most robust design in the industry, available with either geared or gearless drive arrangements. The costeffective FT Series mills are smaller, gear driven and feature hydrodynamic lubrication.
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
Single stage SAG Mills are very beneficial in reducing CAPEX for plants with a staged throughput approach. When future tonnage is to be increased, the SAG Mill can feed downstream ball milling to boost capacity. FullerTraylor SAGAG Mills range in size from 4.3m through 12.2m in diameter with powers as high as 28,000 kW.
Ball Mill Maintenance Manual. The purpose of this manual is to assist you in the proper installation and to acquaint you a bit further with the assembly and care of this equipment. We suggest that these instructions be read carefully and reviewed by everyone whenever involved in the actual installation and operation of the mill.