sag mill gear failure

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Sag Mill With Bull Gear For Copper

Sag Mill Ring Gear Failure Paper 25 - copper mountain overview on the grinding , which just has started commercial operation earlier this year the grinding process with one 34 x 20 sag mill,...

SAG Mill Components

SAG Mill Components Previous Next , from gear vendors determine the minimum number of pinions which can be used to drive the mill as well as the number of gear sections If the mill requires approximately 6000 horsepower or less, it is possible to drive it with a single pinion To date, however, economics has dictated that most mills over ....

Autogenous and Semi

SAG and AG Mills operate by lifting ore/grinding media and dropping it on the operating bed of the mill charge High impacts from lifting ore and media promote impact breakage which is the primary mechanism for size reduction in the mill...

How to Analyze Gear Failures

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 ....

Item Detail

Dec 14, 2018· The purpose of ANSI/AGMA 6115-A13 is to provide a method for determining the power rating of gear sets used in main mill drives, pinion stands, and combination units for metal rolling mills This standard was written to address the fundamental differences between typical enclosed drive applications and rolling mill applications...

Sag mill ring gear failure grinding mill china

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 Anything gear and pinion really The discharge end of the mill ....

Three causes of gearbox failure

May 17, 2018· Failure modes can involve bearing failures or gear failures, or both Lubrication Lubrication is critical for both bearing and gear life Important aspects of lubrication are the volume of lubricant that is delivered to each gear mesh and bearings, as well as the properties of the lubricant...

Wear and Failure Analysis of Semi

The wear and failure analysis of shell liners of a grinding mill is investigated Metallurgical and tribological studies were conducted on the worn liner of a semi-autogenous grinding mill in Chadormalu Industrial Complex The chemical analysis, wear mechanism, microstructural variations and mechanical properties in different sections of the worn liner were evaluated using visual inspection ....

Grinding Mill Liners

Jul 22, 2016· Grinding Mill Liners- An Overview , the majority of premature liner or bolting failure is normally attributed to incorrect operational methods such as excessive high ball to feed ratio ....

Paper # 25

COPPER MOUNTAIN: OVERVIEW ON THE GRINDING MILLS AND THEIR DUAL PINION MILL DRIVES ABSTRACT This paper will first give a short overview of the Copper Mountain project in British Columbia, which just has started commercial operation earlier this year The grinding process with one 34' x 20' SAG...

Ball Mill Girth Gear and Pinion Alignment

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...

Engineering&Project History

Crusher Failure Root cause analysis Ball Mill Gear Failure Analysis Analysis of SAG mill motor drive failures Regrind Mill Refurbishment Project management, inspection and technical services for the refurbishment and installation of used ball mill Oceanagold (Philippines), Inc Didipio Gold Copper Project Project Coordination Ok Tedi Mining ....

Grinding mills

Every mining operation has a unique grinding process 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...

largest gear driven sag mill

sag mill ring gear failure grinding mill china - osteodonsnl SAG mill conference, provided details of the then largest gear drive in operation on a SAG mill (34ft x 18ft) at Escondida 134MW, which , an equivalent gear drive grinding mill The cast heads are heavier with a ,...

Ball Mill/SAG/AG Mill Girth Gear

Ball Mill/SAG/AG Mill Girth Gear We can provide various types and models of ball mill girth gears,SAG mill girth gears, AG mill girth gears,Cement rotary kiln girth gears, rod mill girth gears,ductile iron girth gear,CITIC mill girth gears for mine and cement users around the world...

Mill (grinding)

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' (128m) in diameter, powered by a 28 MW (38,000 HP) motor...

Ball Mill Critical Speed & Working Principle

Jun 19, 2015· Besides dissipating a significant fraction of the total energy consumed by the mill (for example, the outer row of 50 mm diameter balls in a 4 meter diameter mill ,...

Difference Between Sag Mill vs Ball Mill

Oct 12, 2017· SAG mill make use of steel balls included with some large and hard rocks for grinding These mills utilize the balls in making the large fragments of materials broken into piec The ball charge of a SAG mill is about 9% to 20%This process takes place inside the large rotating drum of SAG mill which is filled with balls partially...

Cadia Girth Gear Failures

Sep 22, 2014· This is an update of work presented at the SAG 2001 conference on the Cadia gears [1] Both gears and pinions on twin ball mills failed almost simultaneously Our 2001 paper showed that the location of the failures is explained by the shape of the girth gear blanks...

reasons for ball mill bearings failure

Home>Crusher and Mill >reasons for ball mill bearings failure reasons for ball mill bearings failure Roling Bearings: Failures, Causes and Countermeasur Koyo® Ball & Roller Bearings: Failures, Causes and Countermeasures JT£ KT CA TNOB300 1 E JTEKT CORPORATION , Sag Mill gear failure - OneMine Mining and Minerals ....

The Selection and Design of Mill Liners

The Selection and Design of Mill Liners Malcolm Powell*, Ian Smit#, , Dramatic shortcomings of mill liner designs, especially of large SAG mills, - such as rapid failure and even mill shell damage arising from impacting of the charge directly on the liner, and unsuitable...