PAPER TECHNOLOGY INTERNATIONAL Rotary kiln predictive maintenance to prevent downtime. Nicholas Dannias, Marketing Manager, Jammbco Industrial Solutions Ltd

PAPERTECHNOLOGYINTERNATIONAL
Early indicators that matter most.
The most useful predictive maintenance signals are not always the most sophisticated. The best indicators are the ones that change
early, can be trended consistently, and lead to a clear maintenance decision.
Reactive, preventive, and predictive maintenance are not the same.
Plants often say they are doing predictive maintenance when they are really doing time-based preventive maintenance with a few
condition checks added on top. The difference matters.
What data should a rotary kiln team trend every week.
A useful predictive maintenance program starts with a short
list of trendable variables that operations and maintenance trust. For
most lime and cement kilns, the weekly review should include the
following.
•
Shell Temperature Pro昀椀le. Trend full-shell infrared data
or, at minimum, comparable location checks.
•
Tyre, Roller, And Bearing Temperatures. Look for
deviation from normal patterns, not only alarm
exceedance.
•
Vibration On Drives and Critical Rotating Components.
Watch directional change and rate of change.
•
Motor Load And Power Consumption. Abnormal shifts
can indicate process resistance or mechanical distress.
•
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•
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•
•
Kiln Thrust and Contact Patterns. Record how the kiln
is riding, not just where it is riding.
Exit Gas Temperature. In many kilns, this is one of the
clearest indicators of declining heat recovery.
Pressure Drop and Draft Stability. Useful for identifying
build-up, plugging, or combustion instability.
Fuel Rate Versus Throughput. A widening gap often
points to heat transfer or process inef昀椀ciency.
Dust Loading and Recycle Observations. These
symptoms often expose chain section or back-end
performance problems early.
Inspection Notes from Operators. Repeated 昀椀eld
observations are often the 昀椀rst signal that the data later
explains.
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