Sag Mill Vibration Problems

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SAG MILL HIGH VIBRATION | AMP Maintenance Forums

18/06/2010· I once had a very similar problem in a ball mill that was almost identical in drive line and support configuration. This machine had a dominant 10.4cps. Being such a large piece of equipment the vibration transmitted through the drive line and foundations and could be seen shaking nearby walkway handrails. The problem was in the trunnion bearings lift/lube oil circuit. I believe it was from a valve …

Ball Mills and Sag Mill problem | AMP Maintenance Forums

21/11/2007· 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).

Vibration measurement on SAG mill drive motor | IEEE …

30/06/2020· Vibration measurement on SAG mill drive motor for Energy harvesting or predictive maintenance

OPTIMAL SAG MILL CONTROL USING VIBRATION & DIGITAL …

SAG, AG, Mill, Vibration, Process, Control, Optimization INTRODUCTION The vibration sensor based signals are more responsive and have a greater dynamic range than traditional control signals such as electronic ears, bearing pressure and mill power. The increased response time of these new signals allow for quicker and more accurate control of the mill fill level, thereby increasing the ...

SAG Milling in Australia -Revised Submission

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 ring motor at Cadia. At Cadia, excessive vibration and deflections in the drive stator were encountered during

Choosing vibration monitoring methods - Applications ...

A SAG mill is generally used as a primary or first-stage grinding solution. Attrition between grinding balls and ore particles causes grinding of finer particles.SAG mills are primarily used at gold, copper and platinum mines with applications also in the lead, zinc, silver, alumina and nickel industries. These mills are characterized by their large diameter and short length, as compared to ball mills. The inside of the mill is lined with lifting plates to lift the material inside the mill ...

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

10/09/2014· Whilst the direct cause of the Cadia vibration problems and the rotor pole cracks is related to estimation of material properties in laminations, it does not explain why the designers did not catch these errors during the design phase of the motor, i.e., it is not the root cause of the failure. The origins of the failure can be traced back to c. 1994 when PT Freeport Indonesia ordered its first gearless drive for their 34 ft SAG mill. …

Throughput optimisation in milling circuits

SAG mill discharge control is quite involved due to few interactive variables, such as mill discharge sump level, classification hydro-cyclone variables (feed density, flow and pressure) and water feed rate to the sump. Model predictive control (MPC), which is a multi-input multi-output (MIMO) controller, is very suitable for this purpose. If a particle size analyser is installed it can be ...

Optimizing your SAG mill operation - International Mining

21/03/2007· All AG/SAG mills using radial or curved pulp lifters suffer from inherent material transport problems such as slurry and pebble pooling, which decrease throughput and increase energy consumption. The TPL completely eliminates slurry pooling and pebble pooling problems and ensures the best grinding conditions, thus allowing AG/SAG mills to operate at maximum possible capacity …

SAG MILL HIGH VIBRATION | AMP Maintenance Forums

18/06/2010· I once had a very similar problem in a ball mill that was almost identical in drive line and support configuration. This machine had a dominant 10.4cps. Being such a large piece of equipment the vibration transmitted through the drive line and foundations and could be seen shaking nearby walkway handrails. The problem was in the trunnion bearings lift/lube oil circuit. I believe it was from a ...

sag mill vibration - CR4 Discussion Thread

21/07/2009· I m on a mining industry. we re having excessive vibration on the discharge end of our trunnion sag mill bearing. we already ask help for some expert and we are just done on relining the mill…

Sag Mill Syncronis Motor high axial vibration non drive ...

01/11/2014· We have found nothing mechanically wrong to relate to this problem. The vibration has high energy, Time wave forms are sinusoidal and not impactive. I have tried to relate this frequency to other parts on the Sag Mill with no luck. This is why I come back to the motor. Will upload the vibration spectrums when I can Again thank you all for comments and advice . RE: Sag Mill Syncronis Motor …

SAG MILL DISCHARGE SCREENS-TROMMEL vs. VIBRATING …

This flowsheet is typical of lines 1 and 3. The SAG mill has a trommel on the discharge end of it. Oversize is returned to the mill by a bucket wheel and water jet. Trommel undersize was pumped to a vibrating screen where the screen oversize was sent back to the mill and the undersize was pumped to the cyclone circuit. Figure 2 shows the flowsheet for line 2 with only the trommel, 21 After ...

Minerals | Free Full-Text | Optimizing Performance of SABC ...

One major issue was the operation of the SAG mill caused vibration at an amplitude of up to 11 mm (on the mill foundation) and therefore it could not be operated at a production rate above 15,000 t/d. To eliminate this issue the mill foundation base was reinforced, effectively eliminating the vibrations and allowing for stable production at about 18,000 t/d (a 20% increase in processing ...

Grinding Mill Foundations

23/09/2014· In terms of actual vibration problems with ring motors, we know of the Cadia vibration issues only. There, we proved conclusively that the vibrations were not related to the design of the foundations. 2 – Difference between Geared and Gearless Mill Foundation Design. There is a key difference in system analysis of geared and gearless mill foundations. In gearless motor foundations, …

Manual design of SAG/ball/rod mill foundations ...

14/03/2007· I have direct experience of a SAG mill with conflicting frequencies causing resonance and vibration problems. I have also heard of many other other operations with similar issues. Once built these are incredibly difficult and expensive to rectify. You mention the need to consult with the mechanical design engineers to analyse forcing frequencies, it is important they also pay special ...

Throughput optimisation in milling circuits

SAG mill discharge control is quite involved due to few interactive variables, such as mill discharge sump level, classification hydro-cyclone variables (feed density, flow and pressure) and water feed rate to the sump. Model predictive control (MPC), which is a multi-input multi-output (MIMO) controller, is very suitable for this purpose. If a particle size analyser is installed it can be ...

about problem of cement mills pinion vibrations

sag mill pinion vibration problems , ball mill pinion bearing axial vibration of ball mill Home pinion bearing vibration in cement mills ball mill. 【Live Chat】 ball mill girth gear high vibration problem case study. The girth gear, of gears a case study at Shiraz Cement the wear problems 1 Introduction Ball mills are Check price vibration problem in coal mill gearbox eureloeu Gear Mesh ...

Achievement of High Energy Efficiency in Grinding Mills at ...

SAG Mill Ball Charge The SAG mill was simulated to require a 10-12% ball charge with a top size of 125mm. During the commissioning phase no balls were required to be added to the SAG mill to achieve the target throughput of 575tph. This allows for great flexibility in the future and significant security for the future. Ball Mill Power

sag mill vibration - CR4 Discussion Thread

21/07/2009· I m on a mining industry. we re having excessive vibration on the discharge end of our trunnion sag mill bearing. we already ask help for some expert and we are just done on relining the mill…

Experimental Analysis of Semi-autogenous Grinding Mill ...

04/10/2019· Thus, with condition monitoring of the SAG mill behaviors employing vibration, acoustic and thermal signals, the relevant parameter can be diagnosed and monitored. Accordingly, the mill may work on its optimum conditions without the concern of any imminent problem like mill congestions and unplanned stops. In recent years, many studies have been devoted to the development of mill …

Instability in gearless mill drive motors

One of the problems uncovered by Anglo’s GMD reliability investigation was a serious vibration on a 20 MW, 40 foot GMD on a SAG mill in Australia. This vibration delayed the full commissioning of the mill for some two years. That GMD was not at an Anglo American operation thus information in the public domain had to be used to investigate the problem. It has been reported in the literature ...

Automated SAG Mill Speed Control Using On-contact ...

Automated SAG Mill Speed Control Using On-contact Vibration Sensors Karl Gugel, Director Digital Control Lab & Professor University of Florida, [email protected] Juan Carlos Rodriguez, Process Control, Gold Corp Minera Peñasquito, México, [email protected] Luis J. Gutiérrez, Automation Specialist, TotalMetric, Chile, [email protected] Abstract A low power vibration sensor ...

Ball mill high vibs | AMP Maintenance Forums

Hi Observing high vibs on pressing and lifting pinion DE and NDE bearing on a ball mill. Motor and main GB drive are OK. Clear predominant gear mesh frequency is appearing in the spectrum along with harmonics and side bands. But 1st GMF is predominant. side bands with pinion speed is seen. no GG speed side band was observed Some of the vib data, spectrums and photos shown in the attachment.

Optimizing your SAG mill operation - International Mining

21/03/2007· All AG/SAG mills using radial or curved pulp lifters suffer from inherent material transport problems such as slurry and pebble pooling, which decrease throughput and increase energy consumption. The TPL completely eliminates slurry pooling and pebble pooling problems and ensures the best grinding conditions, thus allowing AG/SAG mills to operate at maximum possible capacity …

working of ball mill and sag mill - Beaumont Balades

SAG MILL HIGH VIBRATION | AMP Maintenance ForumsJun 18, 2010Lubrication Problems or Ball Spin Problems!! | AMP Maintenance ForumsAug 01, 2005Ball mill high vibs | AMP Maintenance Forums Vibration Sag Mill Motor NDE Bearing | AMP Maintenance Forums . SAG Mill - Official Feed The Beast Wiki. Oct 19, 2020 · The SAG Mill is a machine added by Ender IO.It uses Micro Infinity (µI) to grind …

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As per the data’s collected from various bearing points and base locations of SAG Mill, The 525 cpm frequency component in the spectrum doesn’t indicate any machinery problems, as no rotating component in the machine can generate 525 cpm frequency. Hence it is suspected that some kind of non-rotating part/component which is supposed to be a part of the machine is generating this low ...

Ball Mill Maintenance & Installation Procedure

19/10/2016· Gear noises will be prominent and some vibration will occur due to no load and normal back-lash. Furthermore, it will be found that the mill will continue to rotate for some time after the power is shut off. Safety precautions should therefore he observed, and no work should be done on the mill until it has come to a complete stop. We have now reached the point where a half ball or rod charge ...

Achievement of High Energy Efficiency in Grinding Mills at ...

SAG Mill Ball Charge The SAG mill was simulated to require a 10-12% ball charge with a top size of 125mm. During the commissioning phase no balls were required to be added to the SAG mill to achieve the target throughput of 575tph. This allows for great flexibility in the future and significant security for the future. Ball Mill Power