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Get Price And Support OnlineGrinding & Classification Circuits. . An industrial example of its use is for the problem of SAG mill feed rate control, shown in Figure 12, which is notoriously difficult for a PID controller due to the long dead time. Figure 13 shows the results of on/off testing comparing Dahlin and PID control.
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Get Price And Support OnlineThe 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
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Get Price And Support OnlineSurface vibration (acoustic emissions) monitoring is a noninvasive low-cost means of monitoring normally inaccessible attributes of processes or equipment operation. The current investigation monitors vibrations in a SAG mill by an accelerometer attached to the outside of the rotating shell.
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Get Price And Support OnlineThe process state of an AG/SAG mill can be inferred from surface vibration monitoring. This is a passive, non-intrusive, low cost and reliable hardware monitoring technology that is sensitive to .
Get Price And Support Onlinemaintaining 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.
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Get Price And Support OnlineOPTIMAL SAG MILL CONTROL USING VIBRATION & DIGITAL SIGNAL PROCESSING TECHNIQUES ABSTRACT Recent developments in low power wireless and Digital Signal Processing (DSP) technologies have given rise to a new system that can monitor vibrations in real-time on the rotating surface of SAG, AG, and Ball mills.
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Get Price And Support OnlineUses traditional Vibration analysis methods Mechanical Problems-oUnbalance oMisalignment oLoosensess Installation-Soft foot Shaft Eccentricity Unbalanced electromagnetic pull, mechanical problems can lead to bearing damage. Customer Need: To identify presence of such problems to plan maintenance action.
Get Price And Support OnlineGrinding mill finds continuous online surveillance of vibration to be cost effective after conversion from offline system. Semi-autogenous grinding mills, also known simply as SAG mills, grind materials from large chunks into small, usable pieces for processing.
Get Price And Support OnlineMar 14, 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.
Get Price And Support OnlineSAG is an acronym for Semi-Autogenous Grinding. SAG mills are autogenous mills but 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.
Get Price And Support Online• Can be easily retro-fitted to existing mills. The optimal performance of AG/SAG mills is the key to successful plant operation. 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.
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Get Price And Support Onlineiii ABSTRACT Grinding mills used in the mining industries are the most energy-intensive operation and also require a large number of wear resistant materials, which are utilized for mill liners and
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