Mills: SAG, Ball & Rod - CJT Surplus Equipment

Ball Mills: Polysius 2- Unused 10.5' dia x 17' long (3.2m x 5.25m) Polysius ball mills, wet overflow, trommel screen discharge, ring gear (two piece single helical) and pinion drive, shell supported mill (slide shoe bearings), lubrication system, rubber liners, parallel shaft gear reducer, 1000 HP motor …

Grinding Mill Foundations - eand.com.au

This means that SAG mill foundations behave very differently from ball mill foundations. 4 – Mill Designer Stiffness Criteria. One of the mill designers performs a calculation to determine the "target stiffness" of the foundations given the mill and ring motor stiffnesses.

Grinding Mill Gear Assembly - Mineral Processing & Metallurgy

We will begin with the mill's bull gear assembly and work towards the motor, The BULL GEAR, sometimes called the RING GEAR is designed to turn the mill transforming the energy of the motor into motion for the mill. By mill we refer to Ball Mills, Rod Mills and SAG Mills…

slip ring induction motor for sag mills - spydo.in

Ring Motor For Ball Mill. Home>Crusher and Mill >cement mills 800 kw slip ring motor starting, SAG mills, Ball mills,, Now we have a requirement of Slip Ring Induction Motor what .

Ok Tedi plans for long term with SAG mill upgrades by ...

For 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.

Selecting Motor Controls for Mining Process Torque …

Selecting Motor Controls for Mining Process Torque Demands Slide 1 Selecting Motor Controls ... Selecting Motor Controls for Mining Process Torque Demands Slide 3 ... SAG Mill Viewed From Top Motor #1 of 2 Gearbox #1 of 2 Mill Drum Motor #2 of 2 .

Gearless mill drives - Grinding | ABB

ABB's Gearless mill drive system is the most powerful mill drive system in the market to power semiautogenous (SAG), ball and autogenous (AG) mills ... (SAG), ball and autogenous (AG) mills, This 'workhorse' for grinding operations combines a robust, service-friendly and fit for purpose design to provide highest throughput, reliability ...

sag mill ring gear - supremewheels.co.za

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 …

Paper # 25 - Copper Mountain Overview on the Grinding ...

COPPER MOUNTAIN: OVERVIEW ON THE GRINDING MILLS AND THEIR DUAL PINION MILL DRIVES ... SAG mill, ball mill, ring gear, dual pinion, drive systems, variable speed INTRODUCTION ... Mill drive motor size 17,000 HP Mill drive motor type Synchronous 200 RPM

Sag And Ball Mills | Crusher Mills, Cone Crusher, Jaw Crushers

SAG Mill section and Ball Mill section calculated power draw of approximately 8,595 kW (11,521 HP). ... (also called wraparound motor or ring motor) is a very large synchronous motor. ... Find the Right and the Top mode of operation of SAG and BALL mills for your coal handling plant! , a mining machines manufacturer in china focus on your ...

Siemens expands mining portfolio to include gearless drive ...

The 42-foot ring motor is the centerpiece of the gearless drive and wrapped around the tube mill. An increase in tube diameter means that the mass of the ore being ground rises dramatically, and hence also the strain on structural elements and the motor.

Autogenous mills, semi-autogenous mills and ball mills for ...

mill start. Installation of a ring motor on a SAG mill. Synchronous motor drive with air clutch. COMBIFLEX® drive (5,400 kW) with high- speed synchronous motor and fluid coupling. Oil lubri-cated standar-dised pinion arrangement with Ring motor drive. induction motor.

PSP Machinery - Equipment for mining industry

Ring motors for mining mills. Ring motors are designed for direct drive of drum mills. The stator consisting of 1 to 4 weldments according to the mill diameter motor, is anchored to the frame.

ABB ring geared mill drives - YouTube

Jun 05, 2013· For more information: ABB continuously extends technical and performance frontiers of ring-geared mill drive technology to fit site requirements ...

Ring-geared mill drives - Grinding | ABB

We provide optimized mill drive solutions for all types of ring-geared mills: low and high speed, single and dual pinion, with and without a gearbox — all designed for reliable, long life and low maintenance operation. ... Stand-still detection – Prevents the motors from re-starting if the mill is still rocking or moving after a stop command.

Gearless mill drives - Grinding | ABB

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 motor.

Quicker to the gold - Process Industry - Industry - Home ...

Quicker to the gold. ... The gear systems cost much less than a drive variant that uses a ring motor. Because the units in the selected option are standardized, they were also available for quick delivery. ... (SAG) mill measuring 10.4 x 6.1 m with a drive output of 15 MW and an 18-MW ball mill. The SAG mill reduces fragments with a maximum ...

Gearless AG/SAG mills -

With the proven use of gearless drive technology, the limitation of AG/SAG mill size due to gearing constraints has been eliminated. is the world's leading supplier of gearless AG/SAG mills. ... The design features motor rotor elements bolted to a mill shell, a stationary stator assembly surrounds the rotor elements, and electronics ...

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

Literature Review: Gearless Motor Failures – A Mill Designer's Viewpoint ... Literature Reviews, Mill Design, Mills, Ring Motor, SAG mill, Stiffness, Strain Gauging, System Analysis, Vibration, Welding. In [1], Svalbonas reviews the states-of-the-art in the design of grinding mills and ring-motors (for gearless drives). He concludes that ...

Digital Object Identifier Fig 1 Construction of a SAG mill

Cross section of a SAG mill. synchronous ring motor. The stator is separately mounted to the basement. It is fed by a load-commutated cycloconverter with a power rating of typically 20 MW at a maximum fundamental frequency of 6 Hz [3], [4].

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

For example, a SAG mill with an internal diameter of 11 meters will have a critical speed of 12.72 [rpm]. For a Fig. 4, 12-Pulse connection. Twin 6-Pulse cycloconverter-fed synchro- ... Fig. 3, Ring motor with 2 separated stator windings [22]. Measurement Measurement . nominal …

Mill (grinding) - Wikipedia

SAG is an acronym for Semi-Autogenous Grinding. SAG mills are autogenous mills but 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.

ABB buys ring motor business to boost its gearless mill ...

Motors for such applications are already available in ratings up to 28MW. Such motors are powerful enough to rotate a 12.8m SAG (semi-autogenous) mill at 8.9rpm. A mill of this size can process 130,000 tonnes of copper ore per day, producing 163 tonnes of pure copper when smelted.

Uneven SAG Mill Drive Power Draw - Grinding ...

Grinding & Classification Circuits robertd 2018-06-17T09:51:34 ... There are two GE motors for SAG mill but unfortunately sometimes current draw exceeds more than 300 A in one of them and makes SAG mill shut down. ... Connect the other lead from the voltmeter to K phase of the slip ring busbar on the other motor. Ensure connections and area is ...

pinion gear sag mill - bwell.mx

Ring gear drives huge grinding mill. . this semi-autogenous grinding mill (SAG . supplies power to the ring gear through a pinion, and the ring gear turns the mill. Pinion Drive Sag Mill - mayukhportfolio.co.in. Pinion Drive Sag Mill. . ABB synchronous motor AMZ1250 driving the SAG mill pinion gear (CNW Group/ABB inc.) Complex mill upgrade ...

Gearless Drives - industry.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 …

INNOVATION NEWS Mills and GMDs - ABB Ltd

Mills and GMDs Maarten van de Vijfeijken* looks at large, larger and the largest units in grinding ore T he gearless motor (also called wrap-around motor or ring motor) is a very large synchronous motor. The poles of ... reliable drive system for SAG mills. Early SAG mills had a diameter of about 32', later

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 …