what are ring motors for sag mills

Ring-geared mill drives - Grinding | ABB CachedRing-Geared Mill Drives - Flexible and smooth operation - Brochure (English - pdf - Brochure) Copper Mountain: Overview on the grinding mills and their dual pinion mill drives (English - pdf - Technical publication) Measuremens at a state of the art 2x5 MW dual pinion mill drive (English - pdf - Technical publication)

Ring gear drives huge grinding mill | Machine Design CachedRing gear drives huge grinding mill. ... SAG mills can operate at a fixed speed or adjustable speed through the use of ac synchronous motors or dc motors. ... The only method of driving mills over ...

What Are Ring Motors For Sag Mills Cachedslip ring induction motor for sag mills. slip ring motors for ball mill – Grinding Mill China. slip ring induction motor for sag mills. Nov 06, 2012 · panel for ball mill drives and slip ring induction and ball mills for wet. Get Price And Support Online; sag mill wrap around motor ndash grinding mill china .

SAG Mill Grinding Circuit Design CachedMany large mills around the world (Esperanza with a 12.8 m mill. Cadia and Collahuasi with 12.2-m mills, and Antamina. Escondida # IV. 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.

Paper # 25 - Copper Mountain Overview on the Grinding Mills ... Cachedwhich just has started commercial operation earlier this year. The grinding process with one 34' x 20' SAG mill and two 24' x 39.5' ball mills will be briefly discussed. All three mills are gear driven by a ring gear, dual pinion and two low speed synchronous motors. Copper Mountain has installed on all three mills, the

Gearless mill drives - Grinding | ABB CachedRing-geared mills operated with frequency converter (much more than just variable speed) (English - pdf - Article) Use of the latest technology to overcome the demands of mill operation (English - pdf - Article) Gearless mill drive animation (English - mp4 - Movie) Go Gearless Gearless Mill Drives (English - pdf - Brochure)

Mill (grinding) - Wikipedia CachedSAG 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. Other names: Grinding millRelated items: Mortar and pestle, Expeller, ExtruderUses: GrindingSentinel: Siemens Gearless Mill Drives - YouTube CachedJan 19, 2016 · The mills at Sentinel in Zambia are amongst the world’s biggest, with 2 off 40 ft SAG mills complete with 28 MW drives, and 2 off 28 foot-ball mills with 22 MW drives. For mines of this size ... Video Duration: 4 minViews: 24.5KAuthor: SiemensMilling - Energy intensive and high maintenance RING-GEARED MILLS OPERATED WITH FREQUENCY CONVERTER (MUCH MORE THAN JUST VARIABLE SPEED) T. R. von Ow, ABB Switzerland Ltd, Baden-Dattwil, Switzerland B. Gerhard, ABB Switzerland Ltd, Baden-Dattwil, Switzerland ABSTRACT The method of powering mills such as AG, SAG and Ball has a long and technically interesting history.

SAG Milling in Australia -Revised Submission Developments in SAG Mill Design and Operation Over the last few years, SAG mill manufacturing technology has advanced rapidly. The bounds of mill size have been pushed from two directions. Firstly, the advent of ring motors has removed the constraint applied by the power that a single pinion gear was able to transmit.

New & Used Sag Mills for Sale | Semi-Autogenous Grinding Machines CachedWe buy, sell and consign SAG Mills of leading manufacturers like Metso (Allis Chalmers, Dominion, Hardinge, Allis Minerals/Svedala), FLSmidth and many more. SAG is an acronym for Semi-Autogenous Grinding. SAG mills are essentially autogenous mills, but utilize grinding balls to aid in grinding like in a ball mill.

SAG Mill Liner Design - Mineral Processing & Metallurgy CachedTo a more significant degree than in other comminution devices, SAG Mill Liner Design and Configuration can have a substantial effect mill performance. In general terms, lifter spacing and angle, grate open area and aperture size, and pulp lifter design and capacity must be considered.

Design and dynamic behavior of large Ring Motors for grinding ... behavior of large Ring Motors for grinding mills 4 2 Design of Ring Motors Siemens performs electrical and mechanical design of Ring motors in their Dynamowerk factory in Berlin. Ring Motor drive a grinding mill without contact between rotating and fixed parts. This concept avoids girth gear and pinions, which are used for conventional mill ...

Sag Mill Synchronous Motors - Henan Mining Machinery and ... CachedSag 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.

Mining - Grinding and Processing | WEG CachedVariable Speed . Single or double pinion driving systems. 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.

Grinding mills - for mining and minerals processing - Metso CachedEvery mining operation has a unique grinding process. Metso 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.

Ok Tedi plans for long term with SAG ... - International Mining CachedFor SAG 2, Siemens supplies two 8 pole, high speed induction motors to replace the existing slip-ring motors, eliminating all brush or slip-ring related outages and maintenance activities. The four identical variable speed drives (VSD) operating all four mill motors are Sinamics Perfect Harmony GH180 units.

A&CA - Drive and Automatic Control Management CachedDrive and Automatic Control Management (A&CA) was born in 2000 in order to provide assistance and technical services of high specialization on ring motor technologies with application on SAG mills and industrial processes automation.

Gearless Mill Drives | Beneficiation | Siemens Global Website CachedThe 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)

Used Sag Mills for sale. Hardinge equipment & more | Machinio Cached32′ X 12′ HARDINGE-KOPPERS SAG MILL. Manufacturer: Hardinge; 4 Piece shell Bolt on Trunnions with liners Trunnion bearing assemblies with hydrostatic bronze inserts 2 Piece single helical ring gear (2) 3400 HP, 710 RPM GE motors (2) Falk gear reducers, ratio 6.9633:1 (2) P...

Slip Ring Motors - matrix-industries CachedMatrix is a global engineering solutions company with over 14 years of experience, focusing on projects in Oil & Gas, Power Steel, Mining and Infrastructure. We have offices in strategic locations

(PDF) Evaluation of synchronous motors on grinding mills Evaluation of synchronous motors on grinding mills. ... Ball mills and SAG mills, ... the slip-ring Induction motors are often preferred to synchronous motors due to their inherent ability to ...

Gearless Drives - static.dc.siemens.com autogenous grinding (SAG) mills in the framework of an order for two 32-foot SAG mills with a performance of 11,200 kW. This project for the Chuquicamata mine in Chile represented a monumental achievement, as the difference between creating a drive for a 21-foot diameter ring motor and a 32-foot ring motor re-

Hardinge 24 ft x 8 ft SAG Mills ID: 82795 - Savona Equipment CachedThree mills available. Each with 2 Flender gearboxes. Model: ZTNW1430. No motors or liners. Previously operated on dual 1000 hp motors. Ring gear teeth: 217. Pinion gear teeth: 20. Bull gear is 5180 mm working diameter. Shell sections sandblasted and painted. Bearings reported to be in excellent condition.

Advantages of SER drives for SAG mills | GoHz.com CachedDec 19, 2014 · 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.

Drive and Automatic Control Management Drive and Automatic Control Management Furthermore, preventive and corrective maintenance services for ring motors and synchronous motors used in SAG Mills and Ball Mills are provided, as well for low voltage motors. A comprehensive solution to all requirements in electric drives and automation plants is added to this high specialization services.

STEPPING FORWARD: USING VARIABLE SPEED DRIVES FOR OPTIMIZING ... STEPPING FORWARD: USING VARIABLE SPEED DRIVES FOR OPTIMIZING THE GRINDING PROCESS IN SAG AND BALL MILLS *I. Atutxa and I. Legarra . Ingeteam Power Technology . Parque Tecnológico de Bizkaia, Edificio 110 . Zamudio, Vizcaya, Spain (*Corresponding author: [email protected])

Slip Ring Motors For Ball Mill - cz-eu.eu Cachedslip ring motors for ball mill – Grinding Mill China. slip ring motors for ball mill. cement mills 800 kw slip ring motor starting cement mills 800 kw slip ring motor starting crushing limestone quarry convert pe750 1060 . Get Price And Support Online; how does a slip ring motor work that controls the ball mill

Grinding Mill Foundations - eand.com.au CachedSep 23, 2014 · Most of our work since 2000 has been in developing grinding mill foundations to avoid vibration and unacceptable deflections. On a recent project for a plant in Peru, the client was told by the mill vendor that there was no need to do a systems (dynamic) analysis on the mill foundations because the mills on that project were gear driven rather than being driven by ring motors (gearless drives).

Increasing Availability through Advanced Gearless Drive ... selected for the Antapaccay gearless grinding mills as they are the only economical solution for large Gearless Mill Drives. GEARLESS DRIVES FOR GRINDING MILLS Gearless Mill Drive (GMD) systems are characterized by having the motor wrapped around the mill like a ring. For this reason they are often referred to as ring motors.

Gearless mill drive system in iron ore ­processing - Mineral ... CachedABB’s scope of supply includes two GMD systems for 38 foot 23 mw SAG mills (Fig.) comprising transformers, ring motors and complete containerized electrical houses (e-houses). The variable speed drive solution allows for optimization of the grinding processes for ores with varying properties and different mill loads.

Mining, Mineral Processing & Power Plant Equipment for Sale ... CachedMining, Mineral Processing & Power Plant Equipment for Sale since 1999 We offer the most reliable choice for all kinds of Electric Motors, Sychronous Motors, DC Motors, Used Motors, Ball Mills, Rod Mills, Pebble Mills, SAG Mills, Mine Hoists, Crushers, Flotation, Mixers, Pumps, Diesel Generators, Natural Gas Generators and all the Mining ...

ABB Ring-Geared Mill Drives for induction and synchronous motors in single- and dual-pinion configurations. These drives are well-suited for all type of mills and ball mill ap-plications, and are able to cover the power range up to the mechanical limit of the gearbox or the ring gear. The solution provides ad-justable speed for AG and SAG mills, or the opportu-

Increasing availability through advanced Gearless Drive ... time-taking grinding out of the ball mill. Ball mills with Energy savings typically up to 750,000 USD per annum for a 20 MW SAG mill considering a power supply price of 11 US Cents per kWh. Erection and commissioning works on site are reduced by using a completely installed, wired and pre-commis-sioned E-house.

NAME: CHRISTOPHER MEIMARIS Managing Director, EAnD. systems. Dissertation title “Original work on grinding mills, ring motors, foundation systems and gear drives”. Award - Landmark Papers: SAG 2001 Conference. Awarded by the SAG 2001Organising Committee for the two papers: "Remedial Design of the World's Largest SAG Mill Gearless Drive" and "Failure Analysis of Ball Mill Gears".

Starter of SAG Mills with rotor resistance CachedFor now I am working on a mining project which involves starting two SAG mills, the method of starting these mills is by rotor resistance and likewise we are using an energy recovery system (SER), could someone tell me how this system works SER? each mills have two motors of 8000 kW at 13.8 kV. thank you for all.

Ge Grinding Mill Drive Systems CachedAutogenous mills, semi-autogenous mills and ball mills for ... 6 Mill drive systems. Shell-supported grinding mills supplied by Polysius offer the flexibility for equipping with all drive systems available on today’s market. Chat Now

sag mills manufacturers CachedSimplifying wet grinding with AG/SAG mills AG/SAG mills are often the optimum solution for wet grinding (achieved in a slurry 50 to 80 percent solids). AG/SAG mills can accomplish the same size reduction work as two or stages of crushing and screening, a rod mill, and some or all of the work done by a ball mill. Contact Supplier-->

When it Comes to Mining, Bigger is Best | PTE CachedWhen it Comes to Mining, Bigger is Best Gearless mill drives may be the key to maintaining throughput. Venkat Nadipuram. One of the key challenges in the mining industry today is maintaining throughput in the face of ore grade quality that has declined by 40 percent in the last decade.