cycloconverter for sag mill 38 feet

Gearless Mill Drives - ABB

Antamina Compania Minera Antamina S.A. Peru Project: One SAG Mill and 3 Ball Mill Drive Systems Capacity: SAG Mill 1000 t/h Ball Mills 1000 t/h Consultant: Bechtel, USA Mill Builder: FFE Minerals, USA Mill Size: SAG Mill 38 feet/11,58 m Ball Mills 24 feet/7,32 m Ore processed: Copper/Zinc Drive Rating: SAG Mill 20,1 MW, 9,23 rpm Ball Mills 11,2 MW, 11,38 rpm

Gearless Mill Drive Protection Improvements and Its ...

The grinding mill is the rotor of the synchronous motor. Its dimensions are: Diameter : 38 feet Length : 20 feet Ball Mills Quantity : 3 units Composed of a twelve-pulse cycloconverter together with a synchronous ringmotor Power : 18.000 HP Voltage : 3660 V Current : 2240 A Base Speed : 11.5 rpm Maximum Speed : 13.7 rpm Base Frequency : 5.267 Hz

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(PDF) Autogenous and Semi-Autogenous Mills, 2015 Update

Mill designs are of f the shelf tod ay for a SAG mill of up to 28 MW followed by t wo Ball Mills o f up to 24 MW. It is possible to have a single processing line c apable of handling over 200,000 ...

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aplikasi cycloconverter rolling mill dries. aplikasi cycloconverter rolling mill dries Cycloconverter for sag mill 38 feetkorodaFqm has opted for siemens gearless mill drives to be used in the two sag mills having a diameter of 40 feet and an output of 28 mw and the two ball mills with a diameter of 28 feet and an output of 22 mwWith these mill drive systems there is no wear in the drive train ...

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Wet Semi-Autogenous Grinding Mills - 911 Metallurgist

Wet Semi-Autogenous Grinding Mills. The primary mill liner task force was formed in 1977. Its function was to improve the operating costs and milling efficiencies of the ten 8.2-m x 5.5-m (27 ft x 18 ft) wet SAG mills that were operating at the time. The SAG mills are driven by two 3500 HP motors drawing a total of 5450 kW at 76% of critical speed.

Gearless Mill Drive Sales Rev Up to Meet Demand

The SAG mill drive package is rated at 21 MW; the ball mill drives at 16.4 MW. • An order in May 2008 valued at more than €20 million from Aurox Resources Ltd. to supply gearless drives for a 34-ft-diameter, 14-MW SAG mill and a 26-ft-diameter, 17-MW ball mill for an iron ore project in Western Australia.

Composite PulpMax™ mill liners can lower costs and improve ...

Another customer in North America with a 38 ft Ø SAG mill that made a similar change to rubber ceramic composite liners improved the slurry dis- charge by seven percent and processed more than 19 million tonnes during a 12-month campaign. "While I'm confident that cast liners, being incredibly well established, competent and proven, are ...

Design and dynamic behavior of large Ring Motors for ...

Ring Motors vary the speed of the mill by changing the sta-tor frequency. A cycloconverter provides variable frequency for start, stop and speed variation during operation. Figure 1: Ring Motor of the 38' SAG-Mill of Rio Paracatú Mineraçao; Brazil 3 Design Verification To assure reliability of operation the mechanical design must be verified.

Benefits of continuous data acquisition from critical ...

any further. The mill has been in operation one year since the lubrication problem was detected at an early stage Case 2) asset analytics system installed to overlook two (2) GMDs of 38 feet (~11.6 m) diameter SAG mill drives; in a remote location, recording simultaneously data of relevant electrical and mechanical parameters with focus on the

ball mill motor drive schemes - pochiraju.co.in

Gearless Mill Drive Protection Improvements and Its ... - ABB Group. Abstract—A cycloconverter-fed gearless mill drive is a drive system that has ... motor. Its dimensions are: Diameter : 38 feet. Length : 20 feet. Ball Mills. Quantity : 3 units ..... schemes and settings should only …

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$38.99 $ 38. 99. Tools & Home Improvement › ... 2.4 in x 180 ft (Blue) 4.7 out of 5 stars ... SAG. 5.0 out of 5 stars Great Value. Reviewed in the United States on July 5, 2021. Size: 5' x 100' Verified Purchase. I am using this under my house to cover the crawl space. The plastic is durable and easy to handle under my house since it is only ...

(PDF) Technical evaluation and practical experience of ...

sured in a 12-pulse cycloconverter feeding a synchronous motor Fig. 13 shows a typical power filter used in high-power LCI of 20 MW in a 38-ft SAG mill. A large amount of harmonics can drives, which includes tuned filters for harmonics 11 and 13 be observed in this …

Siemens modernises SAG mill gearless drive in Cadia Valley ...

This two-stage grinding circuit consists of a 40 ft SAG mill with a 20 MW Siemens gearless drive and two parallel 10 MW gear driven ball mills. Siemens has now fitted the SAG mill with a Sinamics SL 150 cycloconverter for closed-loop control as well as with a Sinamics DCM control module for the excitation circuit – the first time that both ...

Mill drives: the desire for increased power and the ...

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

(PDF) Technical Evaluation and Practical Experience of ...

Power circuit topology of a cycloconverter-fed mill drive with one three-phase stator winding in the motor. ... feeding a 38-ft SA G mill. ... and A. Sapin, " SAG mill operation with weak.

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Drive Types and Specifications - ScienceDirect

The cycloconverter drive with a synchronous motor is used when four-quadrant operation is required. Particularly for high power rating with high torque at low speed and at standstill but with a rather low maximum speed are drive requirements. Gearless cement mill drives were the first applications of cycloconverters.

Molino Sag Anillo | Transformer | Programmable Logic ...

Description SAG mill motor 20,500 kW, synchronous motor.(Mill Size: 40 ft diam x 20 ft long) 141ML002A 141ML003A. Ball mill motor 14,000 kW, synchronous motor.(Mill Size: 26 ft diam x 40 ft long) 141VY901. Cycloconverter Cubicles for SAG mill drive. 141VY902 141VY903. Cycloconverter Cubicles for Ball mill drives. 141CO901. Drive Control Panels ...

Sag Mill 42 Feet Diameter Iron Ore vaniseghemarmandbe

Cycloconverter For Sag Mill 38 Feet Henan zhengzhou. Sag mill 42 feet diameter iron ore Conga The worlds first 42 foot diameter 28 MW gearless SAG mill The test and study work showed that a single line 42 ft SAG mill circuit gave the Designshall include a ball charge of a least 3greater than the example for Arcelor Mittal North America this ...

ABB in Mining

Gearless mill drive (GMD) and digital services help increase production by 50% at Kinross Tasiast mine in Africa. Driving Boliden's electric transformation, saving 830 m3 of diesel annually and reducing emissions by 80 %. Sustainable deep underground mining: LKAB, …

Cycloconverter - an overview | ScienceDirect Topics

For example, a seamless tube piercing mill [105] where a squirrel cage six-pole 3 MW, 188/300 rpm, 9.6/15.38 Hz, and 2700 V motor is controlled by a cycloconverter bank of capacity 3750 KVA and output voltage 3190 V. Constant Frequency Power Supplies. Some applications such as aircraft and naval ships need a well-regulated constant-frequency ...

Cobre Panama Archives - International Mining

Two 28 MW gearless mill drive systems (GMDs) are operating in the company's 40 ft SAG mills and four 16.5 MW GMDS are employed in 26 football mills along with associated control systems. "Gearless mill drives are the 'workhorses' for grinding operations which are at the heart of any mine.

Published Online August 2021 in IJEAST ( ...

motors are coupled directly to Mill cylinder. Systems with synchronous motors upto 38 MW driven by cyclo-converters are reported. Because of large size of mill cylinder, operating speed is in the range 0-10 RPM. Cyclo-converter inherently though efficient and reliable, has problems related to …

PSP Machinery - References

Ball mill shell 15x21,5 feet 40,6 t 2015 Gebr.Pfeiffer Sichtrad 4,6 t 2015 FL SAG mill shell 36x20 feet 190 t Foto 2015 FL SAG mill shell 36x20 feet 190 t Foto 2015 FL Ball mill shell 26x40,5 feet 293 t Foto 2015 Polysius SAG mil shell 9.7/10,24x6,50m 245,7 t …

gearless mill drives Archives - International Mining

"ABB will install an additional 40 ft, 28 MW SAG mill and two 28 ft, 22 MW ball mills to the project in order to meet the challenge of higher-capacity production coupled with low ore grades. "It obviously costs operators less in terms of capital expenditure to expand existing operations rather than build a new mine, and we have added more ...

gearless mill drives - stedelijkoss.nl

ABB was recently contracted to supply gearless mill drive (GMD) systems for two 38 foot semiautogenous grinding (SAG) mills at the Serra Azul iron ore mine in Brazil The Serra Azul mine unit owned by MMX Mineração e ­Metálicos an EBX Group company is located in the iron quadrangle of Minas Gerais next to Belo Horizonte – the heart of

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Copper Mountain 65,000 t/d expansion approved including ...

The existing SAG mill will be retired. The fourth ball mill, a 22 ft by 38 ft mill, will be installed adjacent to the third ball mill within the existing building. With the addition of the fourth ball mill, the ball milling line will comprise four mills operating in parallel. Two identical 24 ft x 30 ft mills, and two identical 22 ft x 38 ft mills.

A novel approach to the geometallurgical modelling of the ...

The third grinding line (Line 3) consists of one 40 × 22 ft (21,000 kW) SAG mill working with two 26 × 38 ft (15,500 kW each) ball mills. The SAG mill is currently the largest of its kind in the world. The SAG mill trommel oversize product (pebbles) is sent to the pebble crushing plant, consisting of two pebble crushers in parallel.

Increasing availability through advanced Gearless …

Figure 4 – 38 ft SAG mill with GMD in installation phase; rotor poles bolted onto the mill flange and stator shifted back ... with its feeding cycloconverter, pre-installed in an E-house. It also includes the excitation rectifier, the automation sys-tem (for mill and motor) including HMI, monitoring and ...

GMD system for Toromocho mine | ABB

As a result, ABB developed three of the largest diameter and most powerful drive systems for a SAG and two ball mills installed at the highest altitude to date. The fully integrated and optimized solution for the grinding circuit consists of: 1 x 28 MW GMD to power the 40 …

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Among the few being shown, 48 Redwood Road in Sag Harbor is one of the highlights. Priced at $3.25 million, this house is for sale with Zacheriah Dayton of Sotheby's International Realty. The 2,400 square feet of interior space houses three bedrooms including a primary which overlooks the water, plus two-and-a-half bathrooms.

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