Refractory lining is the one part of a kiln nobody sees, and the one part that ends every schedule if it fails. A hot spot on the shell, a chunk of brick lost in the burning zone, a lining that wears faster on one side than the other — none of it shows up until a shutdown is already forced. This case study looks at how a cement plant used condition monitoring inside its CMMS to track refractory wear before it turned into an emergency replacement, and what happened to refractory life, replacement cost, and unplanned kiln stops. Sign up to see the same refractory maintenance workflow built for your own plant.
The Challenge
Refractory condition was only checked during planned kiln shutdowns, so thinning brick and shifting hot spots went untracked for weeks in between. Shell temperature scans existed, but nobody linked them back to a specific zone or a specific cause, so an emergency stop for refractory failure meant losing production days that a planned reline would never have cost.
Results After Tracking Refractory Condition Continuously
-37% Cost
Lower refractory replacement cost once wear was tracked zone by zone instead of guessed at shutdown
+28% Life
Longer average refractory life, extended by catching hot spots before brick loss
-52% Kiln Stops
Fewer unplanned kiln stoppages caused by refractory failure after early flagging began
Emergency Reline Events: A 12-Month Snapshot
Before condition monitoring
After condition monitoring
Each square represents one month. Highlighted squares mark months with an emergency refractory reline. Tracking shell temperature and lining thickness by zone turned a near-monthly event into a rare exception.
Refractory Life: Before vs After
Average refractory service life in the burning zone, before and after shell temperature and lining thickness were tracked continuously instead of checked only at shutdown.
Stop Losing Kiln Days To Refractory Surprises
Oxmaint tracks shell temperature, lining thickness, and wear trends by zone, so refractory issues get scheduled instead of forcing an emergency stop. Sign up for a free trial to build your own refractory maintenance workflow, or book a demo to walk through this case study in detail.
Refractory Maintenance Before And After
| Area |
Before |
After |
| Lining inspection |
Checked only during scheduled shutdowns, months apart |
Shell temperature and wear trends tracked continuously by zone |
| Hot spot detection |
Found by chance or after a shell scan flagged a problem |
Flagged automatically as a work order before brick is lost |
| Replacement planning |
Emergency relines, full zone replaced whether it needed it or not |
Scheduled relines, targeted to the zones actually worn |
| Average refractory life |
7.1 months in the burning zone |
9.1 months in the burning zone |
The Results
Refractory spend stopped being an unpredictable line item. Shell temperature and lining thickness were visible zone by zone between shutdowns, so a thinning section showed up as a scheduled work order weeks before it would have shown up as an emergency stop. The team spent less on full relines and more on targeted repairs to the zones that actually needed them.
Frequently Asked Questions
Q
Why does refractory failure usually turn into an emergency stop?
Lining wear happens gradually and unevenly, and most plants only inspect it during scheduled shutdowns, so a thin zone or a hidden hot spot has no chance to be caught until it fails outright and forces an unplanned kiln stop.
Q
What data actually predicts refractory wear before it becomes a failure?
Shell temperature trends by zone, lining thickness readings, and the rate of change between shutdowns tend to shift well before a hot spot appears, so tracking those against historical baselines gives enough lead time to schedule a repair instead of reacting to a failure.
Q
Does zone-by-zone tracking really reduce replacement cost, or just downtime?
Both. Knowing exactly which zones are worn means only those sections get relined instead of replacing the full lining out of caution, which is where most of the direct cost saving comes from, alongside the avoided downtime.
Turn Refractory Wear Into A Work Order, Not An Emergency
Oxmaint tracks shell temperature, lining thickness, and wear trends continuously, turning early refractory degradation into a planned repair instead of a forced kiln stop. Sign up for a free trial to build your own refractory maintenance workflow, or book a demo to walk through the full case study.
