Apr 18, 2018· SAG Mill Components. Once the basic operating conditions have been defined for the mill designer then, and only then, can he begin taking into account shell and head stresses and trunnion bearing sizes required to carry the load and to give the required openings for feeding and discharging the mills. Mill heads are key structural components of ...
Sag Mill Pinion Failure. Milling Technology – Girth Gears - Torus Insurance. Whilst complete failure of a girth gear is rare, it is ... a technical failure on its SAG mill in 2008. It was ... Vibration analysis of the mill pinion bearings, main. Read more.
Aug 19, 2020· There two main points of the PF curve: 1. Potential failure is the point where we notice that a tooth is starting to crack or fail. 2. Functional failure is the point where the tooth is no longer operating condition. The time between potential failure and functional failure is called the PF interval.
This extended from gearless mill drives to geared mills to mine winders. During this time my main interest was gearless mill drives ("GMDs") in South Africa and Chile. I consulted on 11 GMDs: a) 2 x 26', 17,5 MW BM b) 40', 21 MW SAG and 2 x 26', 16,4 MW BM c) 40', 22 MW SAG and 2 x 26', 16,4 MW BM d) 40' 22 MW SAG and 2 x 26' 16,4 ...
SAG Mill Control: It Shouldnt be that Hard - WOMP. It adds yet another computer system to the control ecosystem and requires integration, ... It is commonly assumed SAG mill control can only be successfully .... capability in the event of bearing lubrication problems or power failures. Read more
Sag Mill Pinion Failure Modes-India Crusher&Mill. sag mill pinion failure modes; Water Words Glossary - NALMS - North American Lake Management ... A water right which has not been put to Beneficial Use for generally ...
How To Install Pinion Ball Mill. Wet ball mill pinion installation wet ball mill installation 9 Wet ball mill pinion installation method is to wet ball mill pinion bearing and fixed on the basis of being winched to the center line align with the oblique axis of 187More detailed ball mill motor drive efficiency OneMine Mining and Minerals.
Nov 21, 2007· I work in an industrial copper company as vibration analysis supervisor. This company started to work about 2 years ago. We have two Ball Mills and one Sag Mill. We had some visual inspection on pinion and ring gears, during these inspections we found some abnormal wear on this gears (pictures show this problem in enclosure).
A sag mill with a 44 134m sag mills are primarily used at gold get price and support online sag mill ring gear failure iqsa sag mill pinion gear alignment motor power to the slip ring induction motor for sag mills and induction motor for the sag mill and liquid rheostat starter lrs and slip ring motor for the ball mill.
Pinion Shaft is the key component in the transmission system of the mill, especially the large-scale SAG mill, AG mill and ball mill. It has strict requirements for material and manufacturing, complex process flow and high precision. Therefore, the selection, technology and manufacture of pinion shaft reflect a certain industrial level.
SAG mill drives (as GMDs) by some operators and principal motor designers/manufacturers until the reasons for known problems in design or manufacturing were better understood and resolved. Accordingly, the latest 40 ft dia. SAG mill is rated at 29 MW and 78% C.S., with a 42 ft dia. mill built but not yet operational. The more recent option
Increasing availability through advanced Gearless Drive ... - Siemens. Figure 1 – Top view of SAG mills with alternative drive options; left side: dual pinion drive including motor, gearbox, .... wear to the mill liners and ball consumption, as explained ..... the reasons in detail based on the failure logbook provided.
Jan 13, 2014· Parts of SAG Mill to be lubricated: Trunion Bearing (feed end) Motor Bearings Gearbox Pinion Bearings Fig.1 : SAG mill Diagram Trunion Bearing (dis. end) 7. Lubricant Data: Masbate Gold Project's SAG mill uses Compounded Gear Oil as their main lubricant. But a different class of Gear oil is use in every operating system of the SAG mill.
We are essentially providing up to twice the power transmission of a conventional dual pinion drive. Gearless mill drive (GMD) technology has further expanded the use of large SAG milling allowing Outotec to produce the world's largest SAG mill of 42' in diameter drawing power at 28 MW. Today, Outotec is the world leading supplier ...
pinion systems to 8 MW per pinion and dual motor systems with quadruple pinions extend the range of gear driven mills to a theoretical limit of 32 MW. The Ernest Henry SAG mill (11 MW) is currently the largest twin pinion single drive mill installed in Australia. Problems have been experienced with the twin pinion drive at Fimiston and with the ...
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.
Single stage SAG Mills are very beneficial in reducing CAPEX for plants with a staged throughput approach. When future tonnage is to be increased, the SAG Mill can feed downstream ball milling to boost capacity. Fuller-Traylor SAG/AG Mills range in size from 4.3m through 12.2m in diameter with powers as high as 28,000 kW.
The Failure and ball mill journal bearing ball mill failure modes pdf ball mill pinion failure in south Get Price And Support Online A Publication of the Lubrication Engineers Technical if a ball mill or SAG mill is out of operation fo.
When SAG mill liner bolts loosen, break or stretch beyond limits, liner impairment and degraded performance are generally next on the agenda, followed by mill stoppage for repair or replacement. ... Finding and fixing issues early will avoid undesired wear, broken teeth or even complete failure of the gear and pinion.
Nov 26, 2019· The biggest characteristic of the sag mill is that the crushing ratio is large. The particle size of the materials to be ground is 300 ~ 400mm, sometimes even larger, and the minimum particle size of the materials to be discharged can reach 0.1 mm. The calculation shows that the crushing ratio can reach 3000 ~ 4000, while the ball mill's ...
Online pinion temperature monitoring of the pinion with infrared temperature sensors is the most consistent and effective means of detecting misalignment of gear driven mill systems, allowing the user to quickly detect and correct any misalignment that may develop.. A common failure cause of gear driven mill systems is misalignment, which in its most severe form can cause rapid tooth fatigue ...
Ball Mill Torque Dual Pinion Failure. Reasons For Ball Mill Bearings Failure Overview On The Grinding Mills And Their Dual Pinion Mill Drives Mill And Two 24 X 39.5 Ball Mills Will Be Briefly Discussed. In 2004 A Failure Of One Of The Two SAG Mills At A Vibration Analysis Of The Mill Pinion Bearings Main
Failure Analysis of a SAG Mill. Towards the end of its service life, a 34ft diameter SAG mill developed cracks in the corner weld. Our engineer inspected the mill. Finite Element Analysis (FEA) was conducted on the shell to determine the reduction in stress intensity at the repaired site. Recommendations were provided for its continuing use and ...
Jan 17, 2021· SAG hardness, in the range of 1.5 to 34 kWh/t to grind to 1.7 mm, and the calculation of the SAG/Bond Wi Ratio was done over a period of 5 years, on 35 projects. and 232 samples, up to the end of 2008. The importance of using this Ratio to help control the power split between SAG and ball mill at the design stage was the second new discovery.
Collahuasi Sag Mill Failure hopetrustcoza. collahuasi sag mill failure ninanscollege Sag Mill Pinion Failure mayukhportfoliocoin Sag Mill Pinion Failure, it is, a technical failure on its SAG mill in 2008 It was, for ball mill installation Collahuasi Mine Component Failure Get Support Online . Oline Chat
Gear Pinion Pinion Low-Speed Stage High-Speed Stage Intermediate-Speed Stage Low-Speed Shaft Intermediate-Speed Shaft High-Speed Shaft Planet Carrier . 8 Typical Failure Modes: Bearings Axial Cracks •Recent failure mode of significant proportions •Most appear initiated with irregular white etching areas •Manifests as axial cracks within ...
When the needed SAG mill pinion energy is not measured accurately, simulation methods are required to convert test results to mill sizes and it becomes difficult if not impossible to check the design or to define exactly how big the mills need to be and what power is required.
mill gear failure - beltconveyers.net | sag mill ring gear failure – YEC Mining Sag Mill gear failure – OneMine Mining and Minerals … TITLE: Variable Speed Drive Sag Milling At The Colosseum Mine : SUMMARY… 1, single gear reduction, with a Falk gear box. … not completely gone through, and.