Input Query
High clinker temperature with low cooling air pressure
Severity · High
Insufficient cooling air is causing elevated clinker exit temperatures.
Clinker exiting > 120°C → conveyor stress, quality loss, elevated secondary air temp.
Confidence
HIGH · 87%
Priority Action
Execute within 15 min
Increase
Zone 1 grate speed by 15–20% and verify Compartment 1–3 air damper positions — check for blockage or jamming.
01
Probable Root Causes — Fault Log
3 entries
RC-01
Insufficient cooling air volume in Zone 1 — fan speed below setpoint or damper partially closed
60%
RC-02
Grate speed too slow → excessive bed depth, reduced air penetration in cooling zone
25%
RC-03
Coarser clinker granulometry — check kiln burning zone & BZT
15%
02
Corrective Procedure
4 steps · ~45 min
01STEP
Increase Zone 1 grate speed by
10–15%; monitor clinker outlet temp every 30 min.
Bed depth target 200–250 mm
02STEP
Verify Compartment 1 & 2 air pressure; check fan speed at VFD.
Design 350–450 mmWG · Zone 1
03STEP
Inspect cooling air dampers in Compartments 1–3 for jamming or incorrect setpoint.
04STEP
After adjustment, monitor secondary & tertiary air temperatures.
SAT recovery > 950°C within 1–2 h
Why this recommendation? Engineer's note
Reasoning trace. The symptom pair (high clinker temp + low Z1 air pressure) most directly points at insufficient Zone-1 air volume. The recommendation prioritises grate-speed adjustment because it is reversible within minutes and directly modulates bed depth, which in turn governs air penetration through the cooling zone.
Damper inspection is sequenced second because it requires field access and may force a brief Zone-1 throughput reduction. Granulometry checks are deferred to step 04 (downstream verification) since they originate upstream and are slower to confirm.
Follow-up diagnostics
Cement process engineering standards · Cooling system parameters