vibration in VRM
at our plant loesche mill LM 24.2 D , and grinding pet coke we increased dam ring height from 90 mm to 110 mm.
and water spray provided, but lot of vibration coming please suggest any suggestions to avoid the vibration.
Please also let me know hydraulic pressure to be increased upto what extent..present is 80 bar.
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Re: vibration in VRM
Since the pet coke is small size balls,its table retention time has to be increased,my only suggestion for your solution is that reduce the table speed from 100% to 90% and make the operational changes for pet coke grinding reduce the table speed to 90% and start with higher seperator speed and increase the feed to maintain the Mill DP of minimum 400-450 mmWc and down the roller with the minimum grinding pressure and spray the water and keep the fan Damper 70% or Fan speed to 85%.For indian/imported coal,normalise your operation.