motors of sag mill
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- motors of sag mill
The Collahuasi motor was for a 40 ft SAG mill. The Antamina 38 ft SAG mill was also driven by an ABB motor and the hanger plates had not failed on that machine after several years of operation. Similarly, the Sossego motor for the 38 ft SAG mill had not failed. It too had an ABB motor and it had operated longer than the Collahuasi motor.
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Since the early 1980s, we have been designing and manufacturing Semi Autogenous Mill (SAG Mill) and Autogenous Mill (AG Mill) under the Fuller-Traylor brand. Semi-autogenous grinding uses a minimal ball charge in the range of 6-15% while autogenous grinding uses ore only. SAG and AG Mills operate by lifting ore/grinding media and dropping it on ...
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Autogenous mill and semi autogenous mill polysiususa. Grinding plant with SAG and tube mill for Gold copper ore grinding in Australia This is the world s biggest SAG mill equipped with sliding shoe bearing arrangement and COMBIFLEX® drive system a favourably priced alternative to the ring motors normally used with SAG mills of this size
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SAG mill make use of steel balls included with some large and hard rocks for grinding. These mills utilize the balls in making the large fragments of materials broken into pieces. The ball charge of a SAG mill is about 9% to 20%.This process takes place inside the large rotating drum of SAG mill which is filled with balls partially.
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For Julio Pedraza, from Codelco Andina, another of the great benefits that this change of motors brought to his SAG ball mills was related to the experience and technical capacity of Outotec to implement the project with zero accidents, and the best quality.
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The biggest characteristic of the sag mill is that the crushing ratio is large. The particle size of the materials to be ground is 300 ~ 400mm, sometimes even larger, and the minimum particle size of the materials to be discharged can reach 0.1 mm. The calculation shows that the crushing ratio can reach 3000 ~ 4000, while the ball mill's ...
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A SAG mill is usually a primary or first stage grinder. SAG mills use a ball charge of 8 to 21%.[6][7] The largest SAG mill is 42′ (12.8m) in diameter, powered by a 28 MW (38,000 HP) motor.[8] A SAG mill with a 44′ (13.4m) diameter and a …
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Designed to drive and control the speed of the medium voltage motors coupled to the SAG/AG, ball and HPGR mills with single or double pinion, the MVW01 frequency drive uses state of the art technology through a multilevel structure with medium voltage IGBTs, reducing the harmonic currents on the motor to extremely low levels.
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To predict the power of the SAG mill, Hoseinian et al. proposed an analytical model based on gene expression programming. To develop their model, they employed several tests by varying the SAG mill parameters such as the moisture of charge, mass flow rate, cell weight of mill load, solid percentage and inlet and outlet water to the SAG mill.
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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 ...
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SAG mill for sale,SAG mills Design,Used SAG wet Mill ... SBM has exported grinding SAG mill used for mining & SAG milling ... the advent of ring motors has removed the constraint ... driven from a single motor, ...
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Sag Mill Synchronous Motors. Gearbox ratio is best set up to allow the speed range to be covered using the ser drives hyper-synchronous capability.I expect that this type of drive would be the most common large mill variable speed mill drive in the worlds minerals processing industry for the range mentioned above for the last 15 years approximately.
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Starter of SAG Mills with rotor resistance. Each mills have two motors of 8000 kW at 13 8 kV A 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 gears reach their present limit in size...
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Sag Mill Drives: Girth Gears At 18,000 Hp Motors. SAG MILL DRIVES: GIRTH GEARS AT 18,000 HP, Ring motor driven SAG mill for gold ore grinding, x Ideal for ring motor driv Polysius grinding mills. 【live chat support】 Autogenous mills, semi-autogenous mills and ball
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Application note High voltage motors for mills ... of small and medium sized mills: ball, AG, SAG, ... n Slip-ring motors are induction motors with a wound. 7000hp 390rpm GE AC Wound (Slip Ring) Rotor . Mining, Mineral Processing & Power Plant Equipment for Sale since 1999.
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gearless ring motor for sag mill principles. gearless ring motor for sag mill principles. gearless ring motor for sag mill principles Ring gear drives huge grinding mill, SAG mills can operate at a fixed speed or adjustable speed through the use of ac, . sag mill pinion drive jilongzhen, this mill uses a ringmotor drive, Figure 5 The SAG mill is followed by two 20, gearless ring
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Such plots for an example mill, the SAG mill at Cadia (described by Dunne et al., 2001) is shown in Figure 3. Any time a process line (green) touches or exceeds the corresponding motor limit (the red or blue lines), the motor is at risk of tripping due to high current, depending on the conditions. Safe operating of a mill and motor means that
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WEG package powers Sinclair nickel's SAG mill. Located near Leonora in the Eastern Goldfields of Western Australia, the Sinclair nickel deposit was discovered in 2005 by Jubilee Mines NL. Initial exploration indicated the potential for a significant nickel sulphide system that culminated in the go-ahead for a new mine to be constructed in 2007.
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A cyclo-converter reduces the power frequency and a synchronous motor is either wrapped around shell or mounted on a trunnion extension. This makes the mill essentially a part of a synchronous .motor rotor with the stator in its usual position around the rotor. Inherent in this type of drive is limited speed variation.
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AG Mill and SAG Mill. Feeding size: ≤25mm. Capacity: 0.65-615t/h. Output size: 0.074-0.89mm. Applications: It is commonly used in the mineral processing industry and ferrous and non-ferrous metal ore and nonmetal ore processing plants. It can also be used in cement plant, refractory plant, fertilizer plant and smelting plant.
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Northern Star's selection of Outotec for the mill supply is supported by their locally based expertise, large mill supply history and ongoing collaboration with Northern Star." "We are pleased to be chosen as a supplier for the Thunderbox expansion. The gear-driven Premier™ SAG mill to be delivered will feature 18MW of motor power.
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SAG mill drives (as GMDs) by some operators and principal motor designers/manufacturers until the reasons for known problems in design or manufacturing were better understood and resolved. Accordingly, the latest 40 ft dia. SAG mill is rated at 29 MW and 78% C.S., with a 42 ft dia. mill built but not yet operational. The more recent option
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PT Freeport Indonesia, and others with 11.6-m mills) have installed SAG mills of 20 MW. Gearless drives (wrap-around motors) are typically used for large mills, with mills of 25 MW or larger having been designed. Several circuits have …
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Autogenous mills, semi-autogenous mills and ball . Autogenous mills, semi-autogenous ... Two SAG mills with rigid pinion drives. SAG mill ... Drive motors In the case of ring gear drives,
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