sag mill ring gear failure
sag mill ring gear failure
Zhengzhou, Henan China
24 hours At your service

sag mill ring gear failure

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

Sep 10, 2014  The Collahuasi motor was for a 40 ft SAG mill. The Antamina 38 ft SAG mill was also driven by an ABB motor and the hanger plates had not failed on that machine after several years of operation. Similarly, the Sossego motor for the 38 ft SAG mill had not failed. It too had an ABB motor and it had operated longer than the Collahuasi motor.

Machinery Failure - Gilmore Engineers Pty Ltd

A gold mining company contracted Gilmore Engineers to review a mill girth gear failure and the numerous reports that had previously been written regarding its repair. Gilmore Engineers produced a management-level report analysing the failure and providing a recommendation for the potential remaining life of the gear.

sag mill ring gear failure grinding mill china

sag mill pinion failure modes Grinding Mill China. sag mill ring gear failure Kuntang Mining . sag mill ring gear failure Grinding Mill China. gear system in grinding mill for analysis » Learn More Increasing availability through advanced Gearless Drive e.g. inspections of the SAG mill.

Gearless mill drives

The gearless mill drive eliminates ring-gear, pinion, gearbox, coupling, motor shaft and motor ... Larger ball and SAG mills, with higher installed power ratings relative to the mill diameter, offer ... possibility of the catastrophic inter-turn failure by default. They make it possible to have real motor

Grinding Mill Gear Assembly - Mineral Processing Metallurgy

Mar 17, 2017  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

Cadia Girth Gear Failures

Sep 22, 2014  Failure analysis of ball mill gears, SAG 2001 Conference, Vancouver. [2] Fresko et. al. 2004. The use of finite element analysis in the understanding of alignment and load distribution in large grinding mill gear and pinion sets.

Ring-geared mill drives - Grinding ABB

Mill application features. Frozen charge protection – Detects frozen charge in the mill, minimizing equipment wear and liner replacements.; Coupling supervision – Detects if a failure or slippage occurs in the couplings and stops the system in case, preventing major damages.; Stand-still detection – Prevents the motors from re-starting if the mill is still rocking or moving after a stop ...

Mill Pinion Failure Modes - mayukhportfolio.co

sag mill dual pinion geared drive. ... click here to get more infomation about ball mill failure modes. sag mill ring gear failure – Grinding Mill China. Read more rod mill, pinion gear failures - beltconveyers

What's the Difference Between SAG Mill and Ball Mill ...

The big gear of the ball mill fits on the mill shell, the size is bigger, the big gear is divided into half structure, the radial and axial run-out of the big gear are controlled within the national standard, the aging treatment is up to the standard, and the stress and deformation after processing are prevented.

CMP Paper 16.10.09 Final

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.

sag mill ring and pinion - SUPER PRIMEURS

sag mill pinion failure modes [ 4.7 - 5575 Ratings ] The Gulin product line, consisting of more than 30 machines, sets the standard for our industry. ... sag mill ring gear failure - Kuntang Mining . sag mill ring gear failure – Grinding Mill China. gear system in grinding mill for analysis ...

LOCKED CHARGE STARTS AND YOUR GRINDING MILL Jeff

absorption so a failure of mill bearings, (normally the weakest link), is typical. Other costly types ... SAG mill continually pump the finer material out of the mill, lowering ... mill heads, shells, critical fasteners, ring gear and the pinion. Some components will fail

FAILURE ANALYSIS GEARS-SHAFTS-BEARINGS-SEALS

2 — GEAR DISTRESS AND FAILURE MODES Distress or failure of gears may be classified into four categories: 1 – surface fatigue (pitting), 2 – wear, 3 – plastic flow 4 – breakage. The appearance of the various distress and failure modes can differ between gears that have through hardened teeth and those that have surface hardened teeth.

Girth Gear RCFA's - CR4 Discussion Thread

Sep 22, 2011  In May 2011 I experienced a girth gear teeth failure on the joints on one of my Ball Mill and recently I just experienced the more or less the same failure on my other Ball Mill. See Mill Spec and Attched Pictures. ROM SAG Mill. Mill Type . Grate discharge, dry grinding, ball mill. Construction . The mill is constructed from a fabricated shell ...

Gearless Drives - Siemens

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

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.

Mill (grinding) - Wikipedia

SAG 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. A SAG mill with a 44' (13.4m ...

Grinding Mills EAnD

Ring motors are much more complex than grinding mills and the simple remedies offered in the paper would not have avoided most of the past failures. It is shown that external influences and design culture were the root causes of most of the ring motor problems since 1996 and the problems in design culture also exist in some mill vendor design ...

Toromocho – A giant in high-altitude mining

The three gearless mill drive (GMD) systems are the ABB most powerful ever made. The GMD for the 40-foot SAG mill has a power rating of 28 megawatts (MW), and the GMDs for the two 28-foot ball mills have a power rating of 22 MW. They are the largest diameter and most powerful SAG and ball mills drive systems at the highest altitude installed to ...

ABB ring geared mill drives - YouTube

For more information: bit.ly/15Iu5GGABB continuously extends technical and performance frontiers of ring-geared mill drive technology to fit site requ...

Ball Mill Girth Gear and Pinion Alignment - CR4 Discussion ...

Aug 28, 2011  Re: Ball Mill Girth Gear and Pinion Alignment 08/27/2011 2:07 AM pinion alighnment is done by coating the pinion with a lead based grease. after rotating the drum, the grease marks will show the contact area. the pinion should contact the girth "ring" near the center of the gears.

Gearbox Typical Failure Modes, Detection and Mitigation ...

Grind/hone/polish gear teeth Superfinish, coat, or smooth bearing rings or elements Avoid shot-peened flanks Make hardest gear/bearing element as smooth as possible Make pinion 2 HRC points harder than gear Use oil with high micropitting resistance Keep lubricant

US8162246B2 - Multiple safety element torque limiter ...

FIG. 1 depicts a low speed crusher mill 10 having a ring gear 12 affixed to its perimeter at one end driven by two pinions 14 on a shaft 16 supporting a pillow block hearings 18. A pair of variable speed AC motors 20 each have an output shaft 22 which each in turn drive an input of a torque limier 24 of a type described herein and in the ...

REMOTE DIAGNOSTIC SERVICES FOR GEARLESS MILL DRIVES

additional gear boxes are required in order to benefit from the optimum speed range of the drive and converter. There are multiple advantages that GMDs offer over ring-geared mills: The most significant benefit is the increased efficiency which is approximately 95 % compared to 92 to 93 % for a ring-geared mill

Move to Zero Unplanned Downtime - Emerson

operating SAG Mill ring gear. Because this defect only affected one direction, the company operated the mill in the “good” direction until it could be shut down on a planned basis. REDUCE MAINTENANCE COSTS Reduce Spending by Eliminating Maintenance A South American mining company reengineered its processes by investing in Emerson’s condition

LOCKED CHARGE STARTS AND YOUR GRINDING MILL Jeff

absorption so a failure of mill bearings, (normally the weakest link), is typical. Other costly types ... SAG mill continually pump the finer material out of the mill, lowering ... mill heads, shells, critical fasteners, ring gear and the pinion. Some components will fail

RESPONSE OF PRIMARY GRINDING MILL PERFORMANCE TO

SAG mill and how the vibration response and hence mill operating conditions vary as a function of time, including during mill equipment failures such as a broken discharge grate. Opportunities for improved mill control based on the data from the on-line monitor are also discussed, as well as the implications in terms of mill processing and

Gearless Drives - Siemens

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

How to Analyze Gear Failures - Machinery Lubrication

When an important gear failure occurs, someone becomes responsible for analyzing the failure, determining its cause and recommending a solution. A company can select its own engineer, an outside consultant or both. If a consultant is called in, this should be done as early in the process as possible. Though similar procedures apply to any failure analysis, the specific approach can vary depending

Selecting Inching Drives for Mill and Kiln Applications

more than four gear stages to achieve the required ratio should a six pole mote be used. The size of the motor can be determined by the following formula: where P inch is the incher driver power (HP or kW) N o_inch is the requested ouput speed of the mill gear in inching mode N o_mill is the actual output speed of the mill gear in normal ...

Mining Mill Braking Technologies Altra Industrial Motion ...

It is not unusual to find SAG mills up to 40 feet in diameter and Ball mills of 26 feet. Motor power is ever increasing with current designs producing upwards of 20MW. For these large drives the solution has been to introduce low speed ring motors “wrapped” around one end of the mill.

Ball Mill Girth Gear and Pinion Alignment - CR4 Discussion ...

Aug 28, 2011  Re: Ball Mill Girth Gear and Pinion Alignment 08/27/2011 2:07 AM pinion alighnment is done by coating the pinion with a lead based grease. after rotating the drum, the grease marks will show the contact area. the pinion should contact the girth "ring" near the center of the gears.

SAG mill Archives - International Mining

The SAG mill agreement has come about as First Majestic ordered a complete new SAG mill package, which, Condor says, is now superfluous to its requirements. The SAG mill has a mill diameter of 24 ft (7.3 m) and an effective grinding length of 18.5 ft and a structural charge mass of 315 t,

Global Physical Asset Management LinkedIn

Global Physical Asset Management 229 followers on LinkedIn. Third-party girth gear engineering, installation, risk assessments, E2905 inspections, pinion alignments and maintenance Our third-party capabilities are in the engineering, design, manufacture, installation, inspection and maintenance of large girth gear systems. We provide a complete non-destructive test of the integrity of the ...

noise on ball mill after pinion replacement - YouTube

Mar 05, 2014  ball mill vs sag mill - grinder noise on ball mill after pinion replacement Posted at: December 20, How To Solve The Bearing Problems Of Ball Mill ball mill

Global Physical Asset Management LinkedIn

Specialties Gear Engineering , Girth Gear Inspection, Gear Cleaning, Shell Mapping, ASTM E2905, Cleansolv, Pinion Alignment , Ball Mill Inspections, SAG Mill Inspections, Gear Assessment , Risk ...

Grinding mills. - Free Online Library

Sep 01, 1991  The standard line of mills includes autogenous ( AG ) and semiautogenous ( SAG ) mills, beginning with a 6 ft x 2 ft ( 1.83 m x 0.61 m ) 25 hp ( 18.7 kW ) laboratory mill and is followed by 12 ft to 36 ft ( 3.7 m to 11 m ) diameter mills ranging in power from 150