Comminution power geared versus gearless. Posted by Paul Moore on 27th February 2023. It is well known in the mining industry that the biggest mining concentrators, with the highest throughputs and largest mills, have long used gearless mill drives (GMDs). Since their introduction into the market in the 1960s, the GMD installed base has ...
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Siemens' gearless drive technology of to % 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
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Leandro Bomvisinho, M. Sc., Sales Manager Gearless Mill Drives ABB Switzerland Ltd Center of Excellence Mining Process Segelhofstrasse 9P 5405 Baden Dättwil Switzerland Phone: + 41 58 586 71 21 Email: Email: Key Words: Grinding, gearless mill, ringgeared mill, variable speed drives
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During commissioning of the Cadia mills and shortly after, problems developed in the mill drives. The SAG mill gearless drive stator deflected excessively during inching and it "resonated" at normal operating speeds. Furthermore, the ball mill gears were severely scored after four months of operation. EAnD were commissioned by
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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.
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CHH624 Gearless Mill Drive Operation and Maintenance Course goal The goal of this course is to provide participants with the required practical knowledge and information 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
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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 ( to m) and ball mills from 24 to 28 feet ( to m).
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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 arena when it comes to productivity and throughput. The order for SAG mills, ball mills and ...
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Gearless mill drives (GMDs) offer ore producers unrivalled availability, efficiency and durability, while reducing operating expenditure and taking advantage of digitalization. First published in November 2019 issue of International Mining magazine GMD best solution for driving larger, powerful grinding mills
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The billion expansion, which saw throughput rise from 60,000 t/d to 120,000 t/d, involved the addition of two new thyssenkruppmade 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.
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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, servicefriendly and fit for purpose design to provide highest throughput, reliability and availability for your processing plant. eBook: Grinding transformation
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If in the past single pinion mills were enough to process all material, today dual pinion or gearless driven mills are necessary. Not only the mill equipment was adapted to exceed its technical and performance limits. ... Finetuning of the speed in ball mills increases metals recovery; Dedicated mill controller performs critical monitoring ...
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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.
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Our solution: SIMINE Gearless mill drives outstanding reliability for your mine The gearless concept The gearless drive avoids any contact between the rotating mill and the static parts of the motor. This allows for contin uous workflow without maintenance on the gears or the pinions. What used to be downtime is now productive time.
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1. SAG mill is the primary tool for grinding. SAG mill is used before the other mills. Ball mill is a secondary, and it is used after the SAG mill. 2. SAG mill breaks the raw material into pieces for the further grinding. Ball mill is used to grind the pieces of raw material into. powderlike structures. 3.
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Ball mills in this power range are equally, when not more, efficient than their smaller counterparts and are capable of processing the total daily productionwithin the overnight low tariff period for electrical energy. Significant energy and cost economies can be achieved with a gearless mill drive working with a ball mill in these upper power ...
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is currently the gearless mill drive (GMD). In GMD systems the motor's poles are directly installed on a pole flange on the mill shell, and the body of the mill itself becomes the rotor. Ringgeared mill drive For mills with standard diameters or requiring less than 20 MW (approx.) of power, ringgeared mill drives (RMDs) offer the best solution.
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ball mills, 18x27 drive with an air clutch. motor, 602,000 6050 D Primary SAG, 34x1 6 Two vafiable speed dc motors coupled mill, 4 million 22,500 to a gear drive with air clutches. motor, million each 6000 Two secondary ac synchronized motors coupled to a gear mill, million ball mills, 18x27 drive with an air clutch, motor ...
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FL will deliver the three gearless SAG mills, three gearless ball mills and cyclones to the 150,000 Mtpd site by late2023. FL was chosen to deliver the equipment due to the high reliabili
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Even ball mills have a power larger than develop the fieldoriented control required to adjust speed 10 MW. This is why they have an important impact on energy and torque. ... "15 000HP gearless ball mill drive in cementwhy not!," Reliability and Power Quality. He is coauthor of IEEE Trans. Ind. Appl., vol. 32, no. 3, pp. 663669, May ...
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As was mentioned above, a gearless mill drive constitutes both an important part, but also one of the most critical elements of a concentrator or a cement plant. Their purpose is to ensure the continuous rotation of specific types of tumbling mills, more specifically autogenous grinding (AG) mills, semiautogenous grinding (SAG) mills, or ball ...
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The SAG mill drive package is rated at 21 MW; the ball mill drives at MW. • An order in May 2008 valued at more than €20 million from Aurox Resources Ltd. to supply gearless drives for a 34ftdiameter, 14MW SAG mill and a 26ftdiameter, 17MW ball mill for an iron ore project in Western Australia.
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Circle8 Total Talent Flow | 11,833 followers on LinkedIn. To make it flow, is to make it grow | Bij Circle8 (voorheen De Staffing Groep) geloven we dat mensen de bloedsomloop vormen van een ...
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RELIABLE BRAKING TECHNOLOGIES FOR GEARLESS AND GEARED MILLS Leading grinding mill OEMs and mine operators rely on Twiflex Limited for efficient and costeffective hydraulic caliper braking solutions for ball and SAG mills.
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https:///mining/grinding/gearlessmilldrives | ABB ensures maximum throughput, highest availability and peak performance throughout the life cycl...
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FL will deliver the three gearless SAG mills, three gearless ball mills and cyclones to the 150,000 Mtpd site by late2023. FL was chosen to deliver the equipment due to the high reliability and efficient performance of our SAG and ball mill technologies. The Josemaria openpit mine is a highgrade coppergold porphyry project.
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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
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