insurability of large gearless mill drives
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insurability of large gearless mill drives

INSURABILITY OF LARGE GEARLESS MILL DRIVES

1 INSURABILITY OF LARGE GEARLESS MILL DRIVES L. Bos1, *M. van de Vijfeijken2 and J. Koponen2 1Zurich Services Corporation Schaumburg, USA, IL 60196 2ABB Switzerland Ltd Segelhofstrasse 9 P Baden-Daettwil, Switzerland, CH-5401 (*Corresponding author: [email protected])

Insurability of Large Gearless Mill Drives (GMDs)

Sep 28, 2014  Introduction. We have written on risk associated with large ring motors in gearless mill drives previously [1, 2, 3]. In [1], we observed that ABB and Polysius were far too confident in 2001 when they claimed that 42 and 44 ft diameter mills and ring motors posed only manageable risks and that a 44 ft mill and GMD design was ready and waiting for a purchaser [4].

ABB Library - All Categories

Insurability of large gearless mill drives. ID: CH_ATBD_SAG Conference_1, REV:-English. Paper held at SAG Conference 2011 - By Lane Bos (Zurich Insurance), Maarten van de Vijfeijken (ABB) and Jari Koponen (ABB) - The availability and reliability of large grinding mills and their Gearless Mill Drives (GMDs) are of paramount importance for the ...

Gearless mill drives - ABB

2 GEARLESS MILL DES The gearless mill drive eliminates ring-gear, pinion, gearbox, coupling, motor shaft and motor bearings, used within a conventional mill drive system. By mounting the rotor poles directly onto the mill, the mill itself becomes the rotor of the gearless motor. Building a track record

Concepts of Gearless Ball-Mill Drives - IEEE Journals ...

Concepts of Gearless Ball-Mill Drives Abstract: In the past the conventional method of driving large ball mills included some form of speed reducing gear between the higher speed driving motor and the lower speed ball mill. Process developments in the mining and cement industries have increasingly tended toward the use of ever larger ball mills ...

Gearless Drives - Siemens

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

A Mechatronic Solution Design and Experience with Large ...

of large gearless cycloconverter drive sys-tems for SAG-Mills has become more and more common in the recent years. Very high power ratings with excellent dynamic performance and high efficiency over a wide speed range allow advanced optimi-zation of the process. The design of such large mill drive systems requires modern

ABB in Mining

Insurability of large Gearless Mill Drives (English - pdf - Article) Remote diagnostic services for Gearless Mill Drives (English - pdf - Article) Optimized coal handling article (English - pdf - Article) Conveyors - getting carried away in the bulk industry Article in DCi, March 2011, by Ulf Richter DEASY (English - pdf - Article)

Insurability Of Large Gearless Mill Drives

Gearless mill drives go gearless - bsmr-doesburgnl.Gearless drive mills and crushers insurability of large gearless mill drives - gearless drive mills and crushers geared vs gearless drive solutions for grinding mills crusher, this investment is a large copper production line, and finally.Gearless mill drive optical systems - lovingbirthnl.

ABB Library - All Categories

Insurability of large gearless mill drives. ID: CH_ATBD_SAG Conference_1, REV:-English. Paper held at SAG Conference 2011 - By Lane Bos (Zurich Insurance), Maarten van de Vijfeijken (ABB) and Jari Koponen (ABB) - The availability and reliability of large grinding mills and their Gearless Mill Drives (GMDs) are of paramount importance for the ...

Instability in gearless mill drive motors

In 2006 Anglo Platinum ordered two 26-foot ball mills from FFE Minerals – Vecor and two 17,5 MW gearless mill drives (GMDs) from ABB for the 600 kilo tonne per month concentrator for the Potgietersrust Platinum North expansion project. the stator and the rotor. Since very large radial magnetic forces arise if the air gap is

ABB in Mining

Insurability of large Gearless Mill Drives (English - pdf - Article) Remote diagnostic services for Gearless Mill Drives (English - pdf - Article) Optimized coal handling article (English - pdf - Article) Conveyors - getting carried away in the bulk industry Article in DCi, March 2011, by Ulf Richter DEASY (English - pdf - Article)

Gearless Mill Drive Protection Improvements and Its ...

A cycloconverter-fed gearless mill drive is a drive system that has hardware and software protection functions to protect the equipment in case of abnormal operating conditions, malfunctions or ...

A Mechatronic Solution Design and Experience with Large ...

of large gearless cycloconverter drive sys-tems for SAG-Mills has become more and more common in the recent years. Very high power ratings with excellent dynamic performance and high efficiency over a wide speed range allow advanced optimi-zation of the process. The design of such large mill drive systems requires modern

Concepts of Gearless Ball-Mill Drives - IEEE Journals ...

Concepts of Gearless Ball-Mill Drives Abstract: In the past the conventional method of driving large ball mills included some form of speed reducing gear between the higher speed driving motor and the lower speed ball mill. Process developments in the mining and cement industries have increasingly tended toward the use of ever larger ball mills ...

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

For gearless drives, motor torque output at the maximum desired operating mill speed and ball charge volume has to be determined. Primary Mills: Torque Output (by Motor) vs Torque Demand (by Mill) For the purposes of this discussion, “drive speed” refers to the output speed of any mill drive

Insurability Of Large Gearless Mill Drives

Gearless mill drives go gearless - bsmr-doesburgnl.Gearless drive mills and crushers insurability of large gearless mill drives - gearless drive mills and crushers geared vs gearless drive solutions for grinding mills crusher, this investment is a large copper production line, and finally.Gearless mill drive optical systems - lovingbirthnl.

Gearless Mill Drives Beneficiation Siemens Global

SIMINE Gearless mill drives A standard of reliability and efficiency for grinding From Norway to Zambia, from Mongolia to Chile – for over 30 years, mining operators all over the world have been counting on SIMINE Gearless mill drives. Their most important features include a small footprint and less weight than conventional drives.

Dynamowerk Berlin Large Drives Applications Siemens ...

Examples of manufactured motors are Mine Winder, Rolling Mill Motors, Coiler, Gearless Ring Motors, Conveyor Motors, etc. Turbine replacement Discover a solution that

Ball Mill Commissioning Proposal

Jan 13, 2015  1 insurability of large gearless mill drives l ... - Abb The world's first 26ft diameter ball mill was equipped with a 15.5 MW GMD ..... important that the cold commissioning plan and the hot commissioning plan...

GRINDING: ABB commissions six gearless mill drives at ...

Oct 29, 2019  PANAMA – Commercial production of copper now underway at large open pit Cobre Panama mine. Technology leader ABB has deployed six ABB gearless mill drives at the Cobre Panama copper mine, which is located 120 km west of Panama City.. The operator is Mineria Panama S.A. Following a period of ownership transition, First Quantum Minerals Ltd, a well-established and

Increasing availability through advanced Gearless Drive ...

drives necessitate current and voltage deratings which ac-cumulate to power derating factors; e.g. of up to 0.60 for the reference project Antapaccay at 4,200 meters above sea level. GMD’s do not require such a high derating as they can be designed for such conditions in the first place. The Gearless Mill Drive system consists of the ring motor

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

Grinding mill drives play an important role in the mining industry. ... R. A. Errath, “ 15 000-HP gearless ball mill drive in cement-why not!, ... in the application of large drives such as ...

ABB Library - All Categories

Insurability of large gearless mill drives. ID: CH_ATBD_SAG Conference_1, REV:-English. Paper held at SAG Conference 2011 - By Lane Bos (Zurich Insurance), Maarten van de Vijfeijken (ABB) and Jari Koponen (ABB) - The availability and reliability of large grinding mills and their Gearless Mill Drives (GMDs) are of paramount importance for the ...

Instability in gearless mill drive motors

In 2006 Anglo Platinum ordered two 26-foot ball mills from FFE Minerals – Vecor and two 17,5 MW gearless mill drives (GMDs) from ABB for the 600 kilo tonne per month concentrator for the Potgietersrust Platinum North expansion project. the stator and the rotor. Since very large radial magnetic forces arise if the air gap is

Gearless Mill Drive Protection Improvements and Its ...

A cycloconverter-fed gearless mill drive is a drive system that has hardware and software protection functions to protect the equipment in case of abnormal operating conditions, malfunctions or ...

Concepts of Gearless Ball-Mill Drives - IEEE Journals ...

Concepts of Gearless Ball-Mill Drives Abstract: In the past the conventional method of driving large ball mills included some form of speed reducing gear between the higher speed driving motor and the lower speed ball mill. Process developments in the mining and cement industries have increasingly tended toward the use of ever larger ball mills ...

Increasing availability through advanced Gearless Drive ...

drives necessitate current and voltage deratings which ac-cumulate to power derating factors; e.g. of up to 0.60 for the reference project Antapaccay at 4,200 meters above sea level. GMD’s do not require such a high derating as they can be designed for such conditions in the first place. The Gearless Mill Drive system consists of the ring motor

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

Updates on geared vs gearless drive solutions for grinding ...

World’s largest geared drive – 2x8500kW – Wushan, China (operating) Among the many reasons that geared drives on large SAG mills are not favoured, is due to not having an efficient variable speed drive option (60 to 80% critical speed), which is required for process reasons.

Ball Mill Commissioning Proposal

Jan 13, 2015  1 insurability of large gearless mill drives l ... - Abb The world's first 26ft diameter ball mill was equipped with a 15.5 MW GMD ..... important that the cold commissioning plan and the hot commissioning plan...

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

Grinding mill drives play an important role in the mining industry. ... R. A. Errath, “ 15 000-HP gearless ball mill drive in cement-why not!, ... in the application of large drives such as ...

Dynamowerk Berlin Large Drives Applications Siemens ...

Examples of manufactured motors are Mine Winder, Rolling Mill Motors, Coiler, Gearless Ring Motors, Conveyor Motors, etc. Turbine replacement Discover a solution that

Optimised Design of Isolated Industrial Power Systems

4.3 Variable Speed Drives for Grinding Mills 102 4.3.1 General 102 4.3.2 Voltage Source Inverters for Ball Mills 102 4.3.3 SAG Mill 105 4.3.4 Cyclo-converters for Gearless Mill Drives 108 4.3.5 Theoretical Background 113 4.4 Practical Issues with System Harmonics – Harmonic Measurements 120

Gearless Ball Mill Operation

Jan 12, 2019  The reliability of large diameter, high horsepower ball mill is paramount when large production and minimum downtime is required. The 17 ft. x 56 ft. double compartment ball mill at St. Lawrence Cement Company has the first gearless drive built in North America and has the world’s largest hydrodynamic bearings currently built and running.

The Case for Going Gearless E MJ

Earlier this year, Siemens AG’s Drive Technology Division hosted an online press conference at which it presented the technical specifications of its gearless drive conveyor installation at the new Antapaccay copper mine in Peru—a 5,260-mt/h-capacity overland belt that was commissioned in 2012 and has been operating at production levels since October.

VFD dimensioning: High altitude - MB Drive Services

Apr 14, 2020  Medium voltage VFDs operate there successfully driving large SAG and ball mills, pumps, conveyors or fans. Figure 4: Gearless Mill Drive (GMD), courtesy of ABB Figure 4 shows a typical gearless mill drive (GMD) featuring so called ring motor (introduced in 1969 by ABB): the rotor poles are fixed directly to the mill shell and the stator is ...

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