Crushing & Grinding Machines

gearless mill drives Archives

The 12 billion expansion which saw throughput rise from 60 000 t/d to 120 000 t/d involved the addition of two new thyssenkrupp-made ball mills with ABB providing the gearless mill drives GMD technology This came on top of the 33 mills the miner already had up and running as part of the existing 60 000 t/d plant at the operation...

gearless mill drives

Cobre Panama starts up gearless mill drive systems Manufacturer ABB has commissioned six units at copper op Operational Excellence 29 OCTOBER 2019 M C installs motors at Cobre Panamá...

Gearless Mill Drive Reliability ABB Ability

The gearless mill drive eliminates all mechanical components of a conventional mill drive system such as ring-gear pinion gearbox coupling motor shaft and motor bearings By mounting the rotor poles directly onto the mill the mill itself becomes the rotor of the gearless motor...

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...

Gearless mill drives

Our GMD eliminates all mechanical components of a conventional mill drive system such as ring-gear pinion gearbox coupling motor shaft and motor bearings By mounting the rotor poles directly onto the mill the mill itself becomes the rotor of the gearless...

Six gearless mill drives commissioned at Panama s newest

Oct 28 2019 0183 32 Two 28 MW gearless mill drive systems GMDs are operating in the company s 40 ft SAG mills and four 165 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...

Cobre Panama starts up gearless mill drive systems

In all two 28-megawatt gearless mill drive systems GMDs are in use at the mine s 40ft SAG mills and four 165MW GMDs are employed in 26 football mills Gearless mill drives are the workhorses for grinding operations which are at the heart of any mine...

Design review of Gearless Mill Drives

DESIGN REVIEW OF GEARLESS MILL DRIVE MILL SYSTEM ANALYSIS Thulare Bopape Hennie Klopper Anglo Technical Solutions Abstract It has been well established that a critical component of the up-front design for large mills is a full system Finite Element Analysis FEA including the mill and its bearings the motor the foundation and the soil...

gearless drive mills and crushers

Gearless Drives for Ore Conveying and Grinding Cmms Fig air gap monitoring system in a gearless drive gearless drives for grinding mills gearless drives are well proven stateof theart technology for large grinding mills siemens the company that introduced gearless mill drives gmd to mining industry started up its first gmd on a...

Gearless Mill Drives Beneficiation Bulgaria

That is why the gearless drive of a grinding mill is one of the most crucial pieces of equipment in the concentrator and why it is subject to particularly high demands Siemens has provided about 80 SIMINE Gearless mill drives to the mining industry since 1980 In these thirty-plus years SIMINE Gearless mill drives have accumulated a combined...

geared vs gearless drive solutions for grinding mills

Gearless mill drives the gearless mill drive eliminates ringgear 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 abbs experience in optimizing gearless solutions...

Insurability of Large Gearless Mill Drives GMDs

Sep 28 2014 0183 32 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 successfully commissions six gearless mill drives at

Oct 25 2019 0183 32 Technology leader ABB has deployed six ABB Gearless Mill Drives in Panama resulting in the country s first copper ore extraction which is announced this month and as ahead of schedule...

Gearless Mill Drive systems for copper mine in Zambia

FQM 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 MW With these mill drive systems there is no wear in the drive train since all forces are transferred touch-free via a magnetic field...

Gearless mill drives

Gearless mill drives GMDs have been installed on platinum-miner Anglo Platinum s Potgietersrust Platinum PPRust 600 000 t/m concentrator...

GEARLESS DRIVE FOR CEMENT MILL

A gearless drive for the drum of a cement mill or the like wherein the pole wheel ie the rotor of a low-speed electric motor surrounds the drum and is connected to it by a circumferential array of uniformly spaced studs which project radially from the drum and are received in a similar array of uniformly spaced recesses located in the pole wheel structure...

Gearless Mill Drive GMD animation

Oct 15 2012 0183 32 A detailed animation showing the workings of a Gearless Mill Drive GMD created from a series of CAD files and in-situ photographs...

Gearless Ball Mill Operation

Table of ContentsStructural Design of Mill and BearingsStructural Design of the BearingOperational ResultsMaintenance of Gearless Drive Mill 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...

ABB successfully commissions six gearless mill drives at

Oct 25 2019 0183 32 Two 28 MW gearless mill drive systems GMDs are operating in the company s 40 foot SAG mills and four 165 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...

TECHNICAL AND COMMERCIAL BENEFITS OF GEARLESS MILL

Gearless mill drives are a well established solution for grinding applications in the minerals and mining industri The paper describes the functionality and technical features of such drive systems as well as their advantages compared to other drive solutions...

ABB wins gearless mill drive order from Indian producer

ABB announces that it has won an order for the first gearless mill drive GMD system ever to be installed in an Indian manufacturing plant The order was placed at the end of October by the Indian cement manufacturer Lalitha Cement Ltd LCL located in Hyderabad the capital of the Indian state of Andhra Pradesh...

Advantages of Gearless Motor Drives in Large Ore Grinding

Gearless motors up to 22 MW are in service in many of these ore processing plants Gearless motor drives are also known as ring motors or wrap around motors The motor consists of a large number of magnets placed circumferentially on the shell of the grinding mill This is similar to the rotor of a conventional motor...

Gearless mill drives

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...

ABB gearless mill drive system to power SAG mill

ABB gearless mill drive systems feature numerous benefits when compared with conventional geared drive systems superior reliability increased process availability extended life span and improved energy efficiency ABB delivered the world s first gearless machine drive in 1969 which is still operating at the Ciment Lamberg-Lafarge cement...