SAG Mill Gearless Drives Go to South American Projects | E ...

SAG Mill Gearless Drives Go to South American Projects. October 2010 | Suppliers Report. In early September, ABB Group's Minerals Division announced it had won an order from Newmont Mining Corp. to engineer three gearless mill drive (GMD) systems to be installed at the Yanacocha Minas Conga oxide copper-gold project in Peru.

to Build Largest SAG Mill for Newmont's Minas Conga ...

E&MJ reported in October 2010 (See "SAG Mill Gearless Drives Go to South American Projects,"p. 102) ABB Group's Minerals Division had won an order from Newmont Mining Corp. to engineer three gearless mill drive (GMD) systems to be installed at its Yanacocha Minas .

Gearless Mill Drive Sales Rev Up to Meet Demand

Gearless Mill Drive Sales Rev Up to Meet Demand By Russell A. Carter, Managing Editor. Gearless mill drives are becoming the drive system of choice on large AG, SAG and ball mill installations for new projects and existing mill expansions. At least 31 GMDs have been ordered from Siemens and ABB, for .

Gearless Mill Drives | Beneficiation | Siemens

The Siemens 42-ft Gearless Mill Drive, still an evolutionary design approach? (SAG Conf. 2015) Optimization of the drive system for a cyclone feed pump (SME 2015) Increasing availability through advanced Gearless Drive Technology (CMP 2014) Design and dynamic behavior of large ring motors for grinding mills (SMMH 2012)

Gearless Drivesns

Utah, SAG mill and a 11,200 kW gearless drive for the El Teniente, Chile, SAG mill. In a continued call for larger, even more powerful drives, Siemens kept pace. In 1996, Freeport ordered the first gearless drive for a 38-foot SAG mill located at the company's Grasberg plant in Indonesia. This gearless drive .

Gearless Drives for Ore Conveying and Grinding - Cmms ...

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 (10.7 to .

SAG Milling in Australia -Revised Submission

The CCV – ring motor (gearless) drive is used at Cadia (20 MW) and Olympic Dam (18 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

geared vs gearless drive solutions for grinding mills

The SAG mill was fitted with a gearless drive with a power rating of 24 MW and the ball mills were also fitted with gearless drive systems, each providing 16.4 MW. Also included in the scope of supply were transformers, E-houses, the drive control, the cooling system, protection equipment and .

Gearless mill drive order in Kazakhstan - Mineral Processing

ABB recently won an order worth 44 million US$ to deliver three gearless mill drive systems (GMDs) for a new copper mine to be operated by Kazakhmys PLC (Kazakhmys) in southeastern Kazakhstan. The contract was awarded in the first quarter of 2012. Kazakhmys is the largest copper producer in Kazakhstan and one of the top copper producers in the ...

Literature Review: Gearless Motor Failures – A Mill ...

Sep 10, 2014 · Literature Review: Gearless Motor Failures – A Mill Designer's Viewpoint admin 10 September 2014 2014, Ball mill, ... Remedial design of the world's largest SAG mill gearless drive. In Proceedings of the SAG 2001 Conference, Vancouver, Canada. [8] Frank, W-D., Gearless drives – Experiences and new/future developments.

Gearless mill drive images - ABB Group

22.4MW GMD system for a 40-foot semi-autogenous (SAG) mill at Esperanza copper mine, Chile: 01127262_2.jpg: 9462 kB: GMD at Esperanza copper mine, Antofagasta, Chile. 01126997_2.jpg: ... Gearless_mill_drive.jpg: 9609 kB: 22.5MW GMD system for a 38-foot autogenous (AG) grinding mill at Boliden Aitik mine, Sweden:

Increasing Availability through Advanced Gearless Drive ...

Siemens' gearless drive technology of 99.46 to 99.71% - 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

Current Issues on High-Power Cycloconverter - fed Gearless ...

II. BACKGROUND: SEMIAUTOGENOUS GRINDING (SAG) MILL WITH A GEARLESS DRIVE Fig. 1 shows the general scheme of a mill with gearless motor drive. The rotor poles of the synchronous machine are bolted to the mill. There is no gear, because the elec-tromagnetic torque is generated directly to the mill. The sta-

• Published in: international symposium on industrial electronics · 2003Authors: Jorge Pontt · Jose Rodriguez · Waldo Valderrama · G Sepulveda · P Chavez · B CuitinoAffiliation: Valparaiso UniversityAbout: Power quality · Ball mill · Process control · Economies of scale · Information technology[PDF]GET PRICE >>

Gearless Warp Around SAG Mill

Gearless Warp Around SAG Mill View Larger Image For almost a decade now, very good operating experiences have been gained with a total of 28 gearless ring motor drives in the cement industry, driving tube mills with diameters of 2.5 to 4 meters with drive powers ranging from .

ABB gearless mill drive system will power world's first 42 ...

ABB gearless mill drive system will power world's first 42 feet SAG mill Newmont Mining Corporation selects ABB to design three gearless mill drive systems for their new high-altitude copper gold project in Peru. Baden, Switzerland, September 1, 2010 – ABB, the leading power and automation technology group, won an order from Newmont Mining ...

Gearless mill drives - library.e.abb

• 28 MW GMD for a 40' SAG mill • 28 MW GMD for 42' SAG mill Whether it is size or an installation at the highest altitude (4600 m.a.s.l.), ABB's GMDs are well positioned to contribute to the building of larger and ever more powerful mills. — Leading the gearless mill drive evolution The ABB gearless mill drive (GMD) is the most powerful ...

The operation modes of a grinding mill with gearless drive

behavior of the gearless drive and of the mill during these modes of operation. Normal Start can be operated from the local control panel or remotely. The gearless drive accelerates the mill slowly to the preselected speed. In the Normal Stop procedure, the gearless drive reduces the mill speed to zero and stops the mill without oscillation ...

SAG mills -

Gearless mill drive (GMD) technology has further expanded the use of large SAG milling allowing to produce the world's largest SAG mill of 42' in diameter drawing power at 28 MW. Today, is the world leading supplier of gearless SAG mills operating globally.

Siemens modernises SAG mill gearless drive in Cadia Valley

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 types of converter have been used in a gearless drive. The grinding mill control system was switched to Simatic S7 and the control system to ...

INNOVATION NEWS Mills and GMDs - ABB Group

reliable drive system for SAG mills. Early SAG mills had a diameter of about 32', later increasing to 34, 36, 38 and 40'. At the same time the mill volume also increased. Typically a SAG mill has a much larger diameter compared to its length. Yet the SAG mill of Newmont's Yanacocha mine in Peru is a single

Used Sag-mills For Sale

Buy used Sag-mills from A.M. King Industries. We can help guide you to the best solution for your equipment needs.

Ring gear drives huge grinding mill | Machine Design

Ring gear drives huge grinding mill. ... this semi-autogenous grinding mill (SAG — see next section) will use a 43-ft diam. ring-gear drive to transmit 18,000 hp and handle up to 3,000 metric ...

Gearless Mill Drive Sales Rev Up to Meet Demand

Gearless Mill Drive Sales Rev Up to Meet Demand By Russell A. Carter, Managing Editor. Gearless mill drives are becoming the drive system of choice on large AG, SAG and ball mill installations for new projects and existing mill expansions. At least 31 GMDs have been ordered from Siemens and ABB, for .

Gearless drive systems for belt conveyor and grinding ...

The SAG mill was fitted with a gearless drive with a power rating of 24 MW and the ball mills were also fitted with gearless drive systems, each providing 16.4 MW. Also included in the scope of ...

Grinding mills -

Every mining operation has a unique grinding process. has experience of over 8,000 grinding mills globally, including manufacturing and delivering the largest SAG/AG mills in the world. Our experts welcome the opportunity to assist you with circuit and circuit control design as well as start-up, operation, and optimization of your mill.

Operation of High-Power Cycloconverter-Fed Gearless Drives ...

Operation of High-Power Cycloconverter-Fed Gearless Drives Under Abnormal Conditions ... circuit of a typical drive for a high-power SAG mill. The synchronous machine has two three-phase windings, each of ... OPERATION OF HIGH-POWER CCV-FED GEARLESS DRIVES UNDER ABNORMAL CONDITIONS 817 Fig. 7. Generation of a short-circuit current.

• Published in: ieee industry applications society annual meeting · 2004Authors: Jorge Pontt · Jose P Rodriguez · J Rebolledo · Kurt Tischler · Norbert BeckerAffiliation: Valparaiso University · SiemensAbout: Grinding · ThyristorGET PRICE >>

Preprint 13-050

Presently the gearless drive is more costly than the complete mechanical portion (mill rotating element and accessories supplied by the mill manufacturers) and hence the customer/consultant needs to have two parties to deal with from the start of any project. There is an interface between the mill vendor and the gearless motor supplier.

Gearless Drives for Ore Conveying and Grinding - Cmms ...

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 (10.7 to .

Mill (grinding) - Wikipedia

SAG is an acronym for semi-autogenous grinding. SAG mills are autogenous mills that also use grinding balls like a ball mill. A SAG mill is usually a primary or first stage grinder. SAG mills use a ball charge of 8 to 21%. The largest SAG mill is 42' (12.8m) in diameter, powered by a 28 MW (38,000 HP) motor.

Used Sag-mills For Sale

Buy used Sag-mills from A.M. King Industries. We can help guide you to the best solution for your equipment needs.