Cement Manufacturers Association (CMA)

11 Refractory Inspection &Management Checklist (During Operation and Shutdown) • Daily/Shift: Review shell scanner for hot spots (>350–400°C depending on zone); log and trend. • Weekly: Verify refractory installation quality in visible areas; check for cracks or erosion signs. • Monthly: Measure and record shell temperatures at key points; compare with baseline. • Shutdown (Annual or Campaign): • Inspect lining thickness zone-by-zone (burning zone target replacement if <50% original). • Check for alkali infiltration, spalling, or chemical attack. • Evaluate insulation layer integrity; upgrade to fibre-enhanced if losses high. • Apply anti-corrosive paint on kiln shell immediately after de-lining. • Document findings with photos and thickness maps for future reference. • Select refractories based on zone and fuel: magnesia-spinel for burning zone with high TSR; high-alumina or zircon-containing for transition zones; chemically bonded castables for calciner areas. AI/Thermal Scanner Implementation Checklist (6–18 Month Payback Roadmap) • Phase 1 (Months 1–2): Install/upgrade continuous high-resolution scanners (resolution <0.5°C). Train 4–6 operators on dashboard use and basic alerts. • Phase 2 (Months 2–4): Integrate scanner data with existing DCS/APC; set automated alerts for predicted coating loss or hot spots. • Phase 3 (Months 3–6): Pilot AI module for 3–5-week forecasting; validate against actual events. Link to chemistry adjustments. • Phase 4 (Month 6+): Full rollout with digital twin if available; review refractory specs (including material type upgrades) for next shutdown. Monitor ROI through fuel savings and reduced downtime. • Ongoing: Calibrate scanners quarterly; maintain data logs for at least 12 months. Table 2: Traditional vs. Advanced Coating & Refractory Management Aspect Traditional Approach Advanced (AI + Scanners) Practical Benefit for Plant Teams Monitoring Monthly averages, periodic guns Continuous real-time mapping Early detection 3–5 weeks ahead Prediction Reactive to hotspots AI forecasting of collapse risk 70% fewer unplanned stops Campaign life (burning zone) 9–12 months 12–16+ months 15–30% extension, fewer emergencies Fuel Penalty +20–80 kcal/kg <10 kcal/kg 3–8% overall fuel cost reduction Payback Reactive costs accumulate 6–18 months ROI often >650% by year 3