WEBMar 18, 2021 · The processing plant at Mt Milligan is built around a 12m SAG mill, one of only six mills of its kind in the world and the largest in North America. ... The company supplied the gearless mill drive for the SAG mill, as well as two dual pinion mill drives for ball mills. ABB also provided transformers, motors, electrics and synchronisers under a ...
WEBDec 19, 2014 · 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 (cycloconverter) is typically used because gearboxes and pinion gears reach their present .
WEBSep 22, 2014 · This is an update of work presented at the SAG 2001 conference on the Cadia gears [1]. Both gears and pinions on twin ball mills failed almost simultaneously. Our 2001 paper showed that the loion of the failures is explained by the shape of the girth gear blanks. Fresko et. al. [2] shows that Tgears are in fact better than Ygears in terms ...
WEBCyclo Drive 6000 Gearmotor. Our bestselling gearmotor with high strength and reliability, thanks to its unique Cyclo mechanism. With its long history and delivery record, it has become synonymous with the term speed reducer. Unique Cyclo mechanism results in high durability and extended operating life. Wide variety of products available that ...
WEBSAG mill product feeds two parallel ball mills of m× m (internal diameter×length), each with a MW twin pinion drive. The ball mills are operated at a ball charge volume of 30–32% and % critical speed. The SAG mill trommel undersize is combined with the ball mills' discharge and pumped to two parallel packs (clusters) of ...
WEBBoth the SAG mill and ball mill are each driven by two gear units. Because, on a conventional drive variant, only one engagement per pinion with the girth gear is possible per side, an economic power limit of about 8 MW per drive is in effect. With the DMG2 gear units, Siemens said this limit expands to as much as 12 MW per drive.
WEBAhafo sag mill pinion. Inspection of a new pinion shaft to be installed on the Newmont Ahafo Sag Mill RHS drive. Technical Director at SYAMA in Mali, Technical Director at Iduapriem. Technical Director at Morocco. A refurbished swing jaw stock being installed at Golden Star Resources Wassa Mine at the time of working with Ghana Limited.
WEBABB's supply scope included four dualpinion lowspeed mill drive systems for two SAG mills and two ball mills, each consisting of two synchronous motors, converter transformers and ACS6000 frequency converters. These include active rectifier units allowing the mill drives to achieve a power factor of leading.
WEBApr 19, 2020 · Monitoring pinion temperatures on mill gear pinions is an effective and efficient means of monitoring alignment and operating condition. Pinion temperature measurement when applied properly can adequately predict multiple failure modes, including misalignment, overheating from a loss of lubricant event, overheating from .
WEBJun 6, 2016 · AG mills (or SAG mills with low ball charges) are often used in singlestage grinding appliions. Based on their higher throughput and coarser grind relative to AG mills, it is more common for SAG mills to he used as the primary stage of grinding, followed by a second stage of milling. AG/SAG circuits producing a fine grind (particularly ...
WEBJan 13, 2014 · Parts of SAG Mill to be lubried: Trunion Bearing (feed end) Motor Bearings Gearbox Pinion Bearings : SAG mill Diagram Trunion Bearing (dis. end) 11. ... Motor Drive Lubriion System Diagram: Pres. Gauge (before) Pres. Gauge (after) Pres. Regulator Temp. Gauge FILTER (disposable) HEAT EXCHANGER Relief valve MOTOR .
WEBSep 1, 2016 · A data set of mill operating data is collected from published information and compared t o. predictions made by two published mill power draw models for SAG mills (Austin's SAG model and. Morrell ...
WEBOct 19, 2016 · On Mill Installation and Maintenance. Before starting the erection of the mill, adequate handling facilities should be provided or made available, bearing in mind the weights and proportions of the various parts and subassemblies. This information can be ascertained from the drawings and shipping papers.
WEBThe SAG mill pinion energy, W SDT (kWh/t) and SAG discharge Bond ball mill work index, S dBWI (kWh/t), are then used to calculate the total energy to grind the ore from 80% passing 152 mm to 80% passing the client specified final product size P information, along with the ore specific gravity, is used to calculate necessary mill sizes .
WEBThe "pinion power" is the mechanical power available at the output shaft of the motor and is related to the torque required to turn the mill and the mill speed. If you remember back to your electrical engineering courses, the power available in a circuit drops due to losses as you move down the circuit (because each electrical item causes a ...
WEBAug 16, 2021 · Outotec says it will deliver a highcapacity, highpowered Premier™ SAG mill to Northern Star Resources Limited's Thunderbox gold mine expansion project in Western Australia. The typical value of such a delivery is approximately €15 million ( million) depending on the final scope, according to the OEM. The order has been booked ...
WEBMill Design, Manufacture Installation. From design and manufacture to installation, commissioning, and a comprehensive aftermarket service, Harcliff mills are designed with costeffectiveness in mind. Fasttracked deliveries are undertaken when required. Harcliff sizes and designs new mills to suite and optimise your process requirements.
WEB1 x MW gearless mill drive system (GMD) to power the 40 ft SAG mill ; 2 x 13 MW lowspeed dual pinion ringgeared mill drive systems (RMD) to power the plant's 26 ft ball mills; Both drive solutions share many common operation and maintenance features such as frozen charge protection, frozen charge remover, controlled rollback, automatic ...
WEBWalks the walk, talks the torque. Designed to deliver exceptional levels of performance and value, David Brown Santasalo ball mill drives are optimised for primary and secondary grinding appliions. Extensively field tested and proven in harsh cement appliions, our mill drive gearboxes cover all grinding appliions up to 10 MW per drive ...
WEB 6 x 21 ft 2compartment ball mill, Manufactured by Alls Chalmers in USA, Rubber lined shell with used liners, Straight cut gears, 2 piece ring gear, Pinion configured for direct drive, Trunnion bearing pedestals, caps, and babbitt inserts, Steel gear guards, .
WEBSep 10, 2014 · The origins of the failure can be traced back to c. 1994 when PT Freeport Indonesia ordered its first gearless drive for their 34 ft SAG mill. The motor had to fit through a tunnel on the road to the site. This necessitated a change in the frame design from that used in older motors to allow clearance in the tunnel [8]. The next motor for ...
WEBDec 2, 2016 · Firstly, there was a serious flaw in the power configuration of the SAG mill and ball mill (both rated at 6000 kW with a single pinion drive). The capacity of the SAG mill was not fully utilized, as the actual operating power draw was only 3358 kW. This meant it was only operating at 56% of its maximum power, providing large room for .
WEBAug 25, 2011 · Re: Ball Mill Girth Gear and Pinion Alignment. 08/27/2011 2:07 AM. pinion alighnment is done by coating the pinion with a lead based grease. after rotating the drum, the grease marks will show the contact area. the pinion should contact the girth "ring" near the center of the gears. Register to Reply. TonyS.
WEBNews Press Press area Press releases. WEG successfully tests dualpinion ball mill drive. WEG has successfully tested low speed synchronous motors driven by frequency inverters for mills with dual pinions at its plant in Brazil. As a multinational company, WEG supplies a range of solutions to the mining industry for driving large mills ...
WEBApr 7, 2013 · Ring motor driven SAG mill for gold . Assembly of slide shoe bearing. Pressure [bar] Slide shoe bearing. ball mill girth gear driving by torsion shaft and . On offer: a preowned and refurbished ball mill including drive, gearbox, gear rim, pinion, . ? Mill drive assembly with worm gear set has.
WEBNov 1, 2014 · On site we have a Sag Mill Driven by a 5500KW Motor. We have a vibration issue right across the Mill. The highest vibration is 30mm/sec RMS axial on the motor n ... We had a shut down yesterday to check the pinion drive end bearing and the motor journal (white metal bearings). What was noticed is the air gap on the exciter was very uneven.
WEBGrinding and processing. WEG offers the most reliable and efficient solutions for milling plants for ferrous and nonferrous products with their experience of mill drive systems. In the heart of a processing plant, the ball and SAG mills must be driven by solutions that adapt to the characteristics of the minerals in line with the whole process ...
WEBBall mills designed for long life and minimum maintenance overflow ball mill sizes range from 5 ft. x 8 ft. with 75 HP to 30' x 41' . and as much as 30,000 HP. Larger ball mills are available with dual pinion or ring motor drives. Our mills incorporate many of the qualities which have made the Marcy name famous since 1913.
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