Marsh 1 WHY shift to the gearless drives in mineral processing Mill size grinding economies of scale Relative lifecycle cost Lower power consumption Robust design Avoiding critical open gear power trains Variable speed Compatibility with processing plants Engineering design efficiencies Availability Minimal downtime

scheduled Prevention Maintenance downtime A 36‐foot SAG Mill Ring Gear can be cleaned in less than an hour Safe and user friendly this non‐corrosive product is safe on all metals and is designed to rapidly clean gear surfaces High Flashpoint of 1600 F 710 C and 1710 F 770 C

Outotec Grinding technologies 007 the mill drive train to be brought closer to the mill which in turn allows for smaller foundations and lower installation costs Mill drives Most mills are driven by ring gears with a 360° fully enclosing guard The ring gear casting material is either nodular iron cast- or forged steel These gears are usually

2 d4 TM Mill Drivesystem 7 MW 7 MW 14 MW 28 MW 7 MW 4 MW 7 MW 7 MW 7 MW 4 MW 7 MW 7 MW SAG mill 32 ft single drive The natural progression in gear pinion mill drives The QdX4TM Mill Drive provides the next step in the evolution of change in mill drive architecture while allowing the system to be built with components that are within current manufacturing capabilities

AG SAG BALL Mills In any mining operation grinding ore is an essential operation of the process which is performed by Autogenous Semi-Autogenous and Ball mills with power rating of up to 30MW CMD offers various kinds of mechanical power transmission systems for those mills

What makes the wound rotor motor a unique induction machine is its rotor Instead of a series of rotor bars a set of insulated rotor coils is used to accept external impedances The rotor windings are similar to those found on a DC armature with the coils connected together to a set of rings that make contact with carbon-composite brushes The

serves the girth gear pinion sliding shoe bearing and gear unit SAG mill with COMBIFLEX Ball mill with ring motor drive Brake of a ring motor drive 8 Flotation Wet grinding Grinding is one of the most energy-inten-sive production stages and therefore has

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

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 Anything gear and pinion really The discharge end of the mill For the operator this only becomes a problem should the

Surface Contact Fatigue Failure of a Case Hardened Pinion Shaft mill The examination of the component revealed the presence of a cemented layer substantially thicker gear pinion and the ring gear which subjected the system to severe wear in the region of highest stress contact thus denoting a contact fatigue process However cyclic

girth gear manufacturer manual sag mill SAG Mill Girth Gear Failure Averted For more information on this or any other our machinery application Chat Online Get Price sag mill ring gear - Mining equipment 86-21-58386256 Installation of a ring motor on a SAG mill Free online chat Girth gear and pinion Chat Online

Mills and GMDs Maarten van de Vijfeijken looks at large larger and the largest units in grinding ore conventional mill drive system such as ring gear pinion gearbox coupling or air clutch GMD for the world s first 42 SAG mill for the Minas Conga oxide gold copper project in Peru

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

Metallurgical ContentBall Mill TRUNNION BEARINGSTrunnion BRONZE BUSHINGSTRUNNION BASE AND CAPBall Mill LUBRICANT JACKSBall Mill PINION SHAFT BEARINGS The first part of the mill that we will look at is the TRUNNION BEARING This is a HYDROSTATIC BEARING which is a slow moving bearing that carries a heavy load Usually it is constructed from Babbitt s metal

plied gearless drives for two 36-foot ring motors de-veloping a 12 000 kW gearless drive for the Kennecott 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 …

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Jun 05 2013· 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

The gearless mill drive is covering the upper power range of the mills The torque is transmitted to the mill directly through the magnetic field in the air gap of the motor eliminating the gear reducer the ring-gear and the mechanical related issues faced by maintenance with ring-geared mills

pinion gear mating with the gear ring for ball mill View … pinion gear mating with the gear ring for ball mill-On this Product Details Page You Can Find Comprehensive and in-Depth pinion gear mating with the gear ring for …

how to timing gear ball mill TripleH Power ball mills The installation and commissioning of the mills and drives at Copper SAG mill ball mill ring gear Get Price sag mill pinion failure modes Girth Gear Sag Mill Commissioning Mine Girnding Mills sag mill ring gear failure SAG mill Principle of SAG Mill operation SAG is an

Sep 22 2017· xinhai cone ball mill pinion gear Operation Principle of Cone Overflow Ball Mill Xinhai Just like ordinary ball mill the main component of cone overflow ball mill is a cylinder with diameter and length at a reasonable proportion There are some big gear ring on the surface of the cylinder the cylinder is driven by the pinion which meshes with big gear ring

Different types Failure in gears-A Review Arvind Yadav Student of M E Department of Mechanical Engineering MITS Gwalior M P India Abstract- The objective of this paper to present the recent development in the field of gear failure analysis By the help of this paper we can know about different types of failure detection and

The inspection times for a 34 SAG Mill gear drive is seven hours Insurance companies have now accepted this standard This practice standardizes the use of this non-destructive testing approach for large ring gear and pinion inspections delivering consistency efficiency and standardization a service valued worldwide

which 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…

sag mill drives girth gears at 18 000 hp operation and performance this paper was originally presented at the vancouver sag mill conference in 1996 reducing the fatigue life of a girth gear girth gear driving a ball mill the failure the girth gear is the most critical component of the mill drive in

The gearless mill drive is covering the upper power range of the mills The torque is transmitted to the mill directly through the magnetic field in the air gap of the motor eliminating the gear reducer the ring-gear and the mechanical related issues faced by maintenance with ring-geared mills

Failure Analysis of a SAG Mill Failure Analysis of a Girth Gear KCGM contracted Gilmore Engineers to review a mill girth gear failure and the numerous reports that had been produced regarding the excavation Gilmore Engineers produced a management- level report analysing the failure and providing a recommendation for the potential

Nov 08 2016· ABB Motor Gearless Mill Drive GMD System HOW TO REPAIR VRM GEAR BOX - CHINA MADE WITH ROOT CAUSE ANALYISIS OF FAILURE - Duration 13 37 Subodh Soni …

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

Overview on the grinding mills and their dual pinion mill drives SAG mill ball mill ring gear dual pinion drive systems variable speed The grinding circuit consists of a SAG mill and two ball mills all dual pinion gear driven