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the mill gear in inching mode N o_mill is the actual output speed of the mill gear in normal running mode P mill_motor is the actual power of the main drive motor or 2 x main drive motor for dual pinion drives. The power computed above is considered P inch = …
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Search through huge mining inventory of used Ball mills, Sag mills, Pebble mills, grinder mills for sale today and ready for shipping! Allis-Chalmers, , Hardinge, Fl and more! All sizes and horse powers available!
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Used Sag-mills For Sale - Used Mining Processing . Inventory ID: 6C-HM03. UNUSED FL 36' x 24' Dual Pinion SAG Mill with 2 ABB 9,000 kW (12,069 HP) Motors for Total Power of 18,000 kW (24,138 HP)
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MW). It has been the industry standard for SAG mills above 13 MW capacity. However, pinion systems to 8 MW per pinion and dual motor systems with quadruple pinions extend the range of gear driven mills to a theoretical limit of 32 MW. The Ernest Henry SAG mill (11 MW) is currently the largest twin pinion single drive mill installed in Australia.
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Dual pinion sag mill huisarts vansichemnl. Ball Mill Failure Modes stundengebet SAG mill, ball mill, ring gear, dual pinion, drive systems, variable Chat With Sal Chat With Sal ball mill failure modes OptonClinic Ball Mill Ball mills are used primary for single stage fine grinding, regrinding, and as the second stage in two stage grinding circuits According to the need of Chat
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These mills are typically powered using electricity and depending on the required power have different configurations such as central drive, single pinion, dual pinion and gearless mechanical set-up. AG and SAG mills are extensively used in the mining industry for extracting minerals such as metals, oil shale, limestone, rock salt, coal ...
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DUAL PINION MILL DRIVES The SAG and the two ball mills are gear driven and Copper Mountain selected the sophisticated low speed dual pinion mill drives from ABB to drive these mills. Brief History Sophisticated Dual Pinion Mill Drive Technologies About five years ago, ABB was already the market leader for Gearless Mill Drives (GMD).
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Then, in the late 1980s when the price of copper rose quickly from a low of $0.62/lb to a high of $1.62/lb, this substantial increase in price further fuelled the industry demand for larger diameter SAG mills, with mill power quickly doubling from 15,000hp to 30,000hp (11,000-22,000kW). 4 Emerging Trends Driven by the Global Mining Boom.
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Figure 1 – Top view of SAG mills with alternative drive options; left side: dual pinion drive including motor, gearbox, pinion and girth gear; right side: gearless ring motor Declining ore grades, leading to increased material transport and plant throughput requirements, are one of the
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The obvious solution is to use more pinions, say, four per mill, with each pair coupled to the output shafts of a special single-input/double-output …
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SAG mills of over 40-foot diameter have been constructed. Like the ball mill, ... The mills used as an example later in this paper are ring-geared, dual-pinion mill applications (see Figure 2). ABB was awarded the contract to equip mills of this type — at 18 MW, the most powerful ring-geared mills ever built. The huge
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The modernization project includes two 8 MW SAG (semi-autogenous) mills and two 9.7 MW ball mills with dual pinion drives. The new drive systems are replacing the existing synchronous motors and direct converters for the SAG mills and the drive systems of the ball mills, which were installed by a different manufacturer.
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designs at the moment with dual pinion mills up to 22,000 kW and dual girth gear mills up to 34,000 kW. We current-ly have an order for a mine in North America for a ball mill gear with a with a 9,000 kW single pinion drive." While Fritz doesn't know what gear sizes the competition is supplying to the mining market, he does note that
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According to ABB, the upgrades to Vale's existing Clarabelle dual pinion semi-autogenous (SAG) mill will allow it to reduce the size of the ore at the company's nickel and copper mines in the ...
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twin pinion or dual motor and pinion installation. 6. Power demand exceeds 14 MW. This puts the application in the realm of a single mill with gearless drive or, possibly, twin motors each with a twin pinion. See later ... single SAG mill, a two stage grinding circuit is recommended. 4
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Inventory ID: 6C-HM03. UNUSED FL 36' x 24' (11m x 7.3m) Dual Pinion SAG Mill with 2 ABB 9,000 kW (12,069 HP) Motors for Total Power of 18,000 kW (24,138 HP)
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twin pinion drive systems. Early attempts to provide load sharing on ... SER drives are now mature and ready for use on 2 X 10MW dual drive mills. Speed variation required is in the range of +/- 15% of ... SAG mill conference, provided details of the then largest gear drive in operation on a SAG mill (34ft x 18ft) at ndida 13.4MW, which ...
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Description. This gold mine was the first to install Mill Safe Start Systems on both their Ball mill (dual pinion 14 MW) and Sag mill. We actively monitored these mills ever since.
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Mill load sharing – Maintains equal torques on dual pinion mills throughout the whole speed range. Controlled rollback – Prevents backlash and reduces downtime. Mill power ride through – Keeps the mill operating even under voltage dips. Over-duty cycle – Avoids unexpected downtime if the mill gets overloaded.
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All parameters above are good for a 22.5MW to 24MW dual pinion SAG mill drive. Changes to AGMA standard have revitalised the large gear cutting industry and soon a machine shop in Holland will be able to fabricate gears of the following parameters: 20 meters in diameter = 65.6 feet 1.5 meters in face width 400 tonnes of machined weight.
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ABB has commissioned an upgrade to Vale's existing Clarabelle dual pinion semi-autogenous (SAG) mill (Fig. 1). The mill is used to reduce the size of the ore at the company's nickel and copper mines in the Sudbury area, Ontario. The project …
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We are essentially providing up to twice the power transmission of a conventional dual pinion drive. Gearless mill drive (GMD) technology has further expanded the use of large SAG milling allowing Outotec to produce the world's largest …
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UNUSED FL 36' x 24' (11m x 7.3m) Dual Pinion SAG Mill with 2 ABB 9,000 kW (12,069 HP) Motors for Total Power of 18,000 kW (24,138 HP) …
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- Krupp 11MV (5.5MW Dual Pinion) 10.4m diameter x 5.1m EGL SAG Mill; - Krupp 5.5MW 6.1m diameter x 8.4m EGL Ball Mill. Regrind: - 1 x 1.0MW (Svedala) Vertimill; - 1 x 3.0MW M10000 IsaMill (Magnetite circuit: in care and maintenance).
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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 ...
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design mill speed, and the maximum design ball charge volume (Barratt, 1989). For single pinion and dual pinion drives, with 21 MW now a distinct possibility, the probability of pinion changes to a higher mill speed should always be considered when set-ting gear ratios, service factors, and motor power ratings.
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in single- and dual-pinion configurations. These drives are well-suited for all type of mills and ball mill ap-plications, and are able to cover the power range up to the mechanical limit of the gearbox or the ring gear. The solution provides ad-justable speed for AG and SAG mills, or the opportu-nity to tune the speed of the
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The ACS6000 dual pinion mill drive systems include synchronmachines, transformers and E-house. Both the SAG mill as well as the ball mills will be powered by variable speed mill drives; this solution offers the customer exceptional performance …
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Ball/Sag/AG Mill, Roller Press HPGR/HRC The dual pinion drives in a mill can come out of sync due to power problems, or disturbances in the motor control system. Another common problem is frozen charge that has built up inside. This might cause torque peaks or consequential damage.
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The SAG mills are fitted with a dual pinion drive system and are driven by a variable-speed drive comprised of a SER hyper-synchronous drive. The SAG mills are 11 m (36') dia, 7.3 m EGL (26.5'). Each SAG mill is driven by two 8 MW motors.
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