Sag Mill Vibration Problems

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 ...

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).

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 …

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 MILL DISCHARGE SCREENS-TROMMEL vs. VIBRATING Tony …

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 ...

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, ... On the comparison between measured and calculated stresses in large SAG mills. Minerals Engineering 24 (2011) [4] Meimaris, C., Lai, B., Price, B. F., Manchanda, S., 2006. How big is big? – revisited. In Proceedings of the SAG 2006 Conference ...

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 …

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 …

Vibration measurement on SAG mill drive motor | IEEE …

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

ONLINE SAG MILL PULSE MEASUREMENT AND OPTIMIZATION …

vibration problems. Finally this package began to work well in a pilot scale (0.42 X 0.63 m) mill. A number of experiments were conducted to test the robustness and accuracy of the package. The net result is that the package performs very well. Currently we are building the package that would fit on the 1.75 inch lifter bolt of the Cortez SAG ...

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 ...

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, ... On the comparison between measured and calculated stresses in large SAG mills. Minerals Engineering 24 (2011) [4] Meimaris, C., Lai, B., Price, B. F., Manchanda, S., 2006. How big is big? – revisited. In Proceedings of the SAG 2006 Conference ...

Ball Mill Maintenance & Installation Procedure

19/10/2016· We sight herewith the most common problems, with their solutions. No. 1 – GEAR AND PINION VIBRATION. Cause A – EXCESSIVE BACKLASH. Move mill gear toward the pinion and check for proper backlash per separate instructions. Cause B – INSUFFICIENT BACKLASH. Move the mill gear away from the pinion and check for proper backlash per separate instructions. Cause C – OUT OF …

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 ...

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 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 …

ONLINE SAG MILL PULSE MEASUREMENT AND OPTIMIZATION …

vibration problems. Finally this package began to work well in a pilot scale (0.42 X 0.63 m) mill. A number of experiments were conducted to test the robustness and accuracy of the package. The net result is that the package performs very well. Currently we are building the package that would fit on the 1.75 inch lifter bolt of the Cortez SAG ...

II-100 II-101 INTRODUCTION

It employs the world’s largest SAG mill, 40 ft diameter and two 22 ft ball mills in the grinding circuit. In that project, the owners considered it necessary to assess the dynamic response of the foundations for the SAG and ball mills due to vibration problems experienced in other installations. Numerical models of the foundations were developed using the Finite Element Method (FEM). However ...

Mill Sag Mechanical Failure - greenrevolution.org.in

CR4 - Thread: sag mill vibration. archie_mechanical engr. Member. Join Date: Jul 2009. Posts: 5. sag mill vibration.Owing to the severe dynamic operating nature of mill bolts, their proper preload is critical. Improper bolt preload has lead to fatigue failure and slippage - and excessive vibration. Read more. Mechanical Failure Expert Witnesses. Mechanical Failure Expert Witnesses. Parent ...

Grinding Mill Foundations

23/09/2014· Another interesting foundation we studied is the Fimiston SAG mill foundation. The gears on the mill on this foundation were very difficult to align and the alignment and vibration of the system was worse when the mill was rotated in one direction rather than the other. We found that the direction of rotation would result in a change in the vibration levels at the pinion piers of up to 7 times ...

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 maintenance performance. Experience gained from the ...

SPM_Report-_sag_mill - Condition Monitoring the ...

Probable Malfunction: 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 ...

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

maintaining normal production numbers at Gold Corp Peñasquito on two 2265 TPH SAG mills. Additional vibration sensors were also positioned at fixed points on the inlet and discharge ends of the mill to yield two real-time volumetric fill levels along with another fill level measurement taken from the mill shell. Examples of these results have been documented in a previous SAG mill conference ...

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

• Two vibration systems installed and in operation at Gold Corp Peñasquito on their two 2265 TPH SAG mils. • Additions results/trends will be presented from other installations if time is remaining. Slide 2. Process Description • Gold Corp Peñasquito mine consists of two open pit mines, one concentrator plant with two grinding lines. • Ore production: 120,000 DTPD/40,296,000 DTPY, 92 ...

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