1. OUVERTURE ENTRAÎNÉE PAR POINT DE DOULEUR

Managing the final stage of clinker cooling is a critical bottleneck with direct consequences for plant profitability. Inefficient clinker cooler operation leads to excessive heat loss, reducing thermal recovery for your preheater and calciner systems. Unstable cooling results in clinker quality inconsistencies, causing downstream grinding inefficiencies and potential cement performance issues. Frequent maintenance interventions for grates, hydraulique, and fans create unplanned downtime, while highpressure fans drive significant electrical energy consumption. Are you facing rising energy costs per ton of clinker? Is your cooler refractory and mechanical component lifespan shorter than expected? The solution lies in optimizing this essential link between the kiln and the finish mill.

2. APERÇU DU PRODUIT: Grate Clinker Cooler

The Grate Clinker Cooler is a critical heat recovery and conditioning machine installed directly after the rotary kiln discharge. Its primary function is to rapidly reduce clinker temperature from approximately 1200°C to below 100°C for safe handling and storage, while simultaneously recovering and supplying hot air to the kiln and calciner.

Flux de travail opérationnel:
1. Inlet & Distribution: Redhot clinker from the kiln enters via an inlet hopper and is evenly distributed across the full width of the stationary inlet grate.
2. Grate Transport & Primary Cooling: Reciprocating grates convey the clinker bed forward. Highpressure cooling air is forced upward through the grate plates and clinker layer, providing intensive quenching.
3. Heat Recovery: A significant portion of the heated cooling air is directed as secondary air to the kiln combustion zone and as tertiary air to the calciner, directly improving kiln fuel efficiency.
4. Refroidissement final & Décharge: The clinker moves through subsequent grate zones with controlled air volumes for final cooling before being discharged via a drag chain or roller crusher at the cooler outlet.

Champ d'application & Limites:
Portée: Designed for dryprocess cement plants with rotary kilns, suitable for capacities from 1,500 à plus 12,000 DPT. Effective for a wide range of raw mix compositions.
Limites: Performance is highly dependent on consistent clinker granulometry; extreme variations can lead to uneven air distribution (tuyauterie). Not designed for wet process kilns or as a standalone unit without integrated heat recovery ducting.

3. CARACTÉRISTIQUES PRINCIPALES

Système de plaques de grille modulaire | Base technique: Highchromium cast alloy design with optimized aperture geometry | Avantage opérationnel: Exceptional resistance to thermal shock and abrasion, leading to plate lifetimes exceeding 5 years under normal conditions | Impact sur le retour sur investissement: Réduit le coût des stocks de pièces de rechange jusqu'à 30% and major maintenance downtime intervals.

Adaptive Air Flow Control | Base technique: Multiple independently controlled fan zones with PLCmanaged dampers | Avantage opérationnel: Allows precise air volume adjustment per cooling zone based on realtime clinker bed conditions and temperature feedback | Impact sur le retour sur investissement: Improves heat recovery efficiency by 35%, directly reducing specific fuel consumption.

Hydraulic Reciprocating Drive | Base technique: Electrohydraulic drive system with proportional valves for smooth motion control | Avantage opérationnel: Provides infinitely variable stroke length and speed, enabling optimal clinker bed movement without turbulence or dust generation | Impact sur le retour sur investissement: Enhives cooler stability, reduces electrical consumption of drive system by up to 15% par rapport aux systèmes à vitesse fixe.

Advanced Sealing System | Base technique: Labyrinth seals combined with pressurized sealing air chambers at grate edges | Avantage opérationnel: Minimizes false air infiltration into the hot air recuperation ducts | Impact sur le retour sur investissement: Increases secondary/tertiary air temperature by an average of 2030°C, improving overall kiln system thermal efficiency.

Surveillance d'état intégrée | Base technique: Thermocouples embedded in grate plates and bearing sensors on fan motors | Avantage opérationnel: Provides early warning of potential failures like red rivers or mechanical issues through centralized control room alerts | Impact sur le retour sur investissement: Permet la planification de maintenance prédictive, preventing catastrophic failures that can cause 714 days of production loss.

4. AVANTAGES CONCURRENTIELS

| Mesure de performances | Référence des normes de l'industrie | Our Grate Clinker Cooler Solution | Avantage (% Amélioration) |
| : | : | : | : |
| Specific Cooling Air Volume (Nm³/kgcli) | ~2.0 2.2 Nm³/kgcli| ≤1.8 Nm³/kgcli| Jusqu'à 10% réduction |
| Heat Recovery Efficiency (%)| ~70 72%| >74%| ~35% increase |
| Durée de vie de la plaque de grille (mois) | ~36 48 mois| >60 mois| ~25% longer lifespan |
| Consommation d'énergie électrique (kWh/tcli) | ~6 7 kWh/tcli| ~5 5.5 kWh/tcli| Jusqu'à 15% réduction |
| Température de sortie du clinker (°C) Ambient +80100°C| Ambient +65°C max.| More consistent grindability |

5. SPÉCIFICATIONS TECHNIQUES

Plage de capacité: Configurable à partir de 2,500 à 10,000 Tonnes par jour (DPT) of clinker.
Exigences d'alimentation: Total connected load varies by size; par ex., un 5,000 TPD cooler requires approximately 8001000 kW for all fans and drives (3phase, tension selon les spécifications de l'usine).
Spécifications matérielles: Grate plates cast in ZCr26Ni12 highchromium alloy; side liners in abrasionresistant steel; housing constructed from carbon steel with internal refractory lining in hot zones.
Dimensions physiques (Example for 5k TPD): Overall length ~35m; largeur ~6m; height from ground level ~10m.
Plage de fonctionnement environnementale: Conçu pour des températures ambiantes de 20°C à +50°C; dustladen environment compatible.

6. SCÉNARIOS D'APPLICATION

Plant Capacity Upgrade Challenge Challenge A midsized plant increased kiln capacity by 20%, but the existing cooler became a bottleneck, causing high outlet temperatures and reduced kiln efficiency. Solution Implementation A retrofit involved installing wider modular grate sections,a new highefficiency hydraulic drive,and upgraded highpressure fans. Results Quantifiable Outcomes Clinker throughput matched new kiln capacity.outlet temperature stabilized below+75°C,and secondary air temperature increased by45°C,saving1$5%in specific fuel consumption

High Maintenance Cost Scenario Challenge A plant faced annual downtime exceeding300 hours due to frequent grate plate changesand seal failures on an older cooler model. Solution Implementation Replacement with our modular grate system featuringthe advanced sealing technologyand integrated condition monitoring package. Results Quantifiable Outcomes Grate plate replacement interval extendedfrom18to54 months.Predictive monitoring reduced unplanned stopsby80%.Total annual maintenance hours relatedto the cooler fell by over60%

7 CONSIDÉRATIONS COMMERCIALES

La tarification des équipements est échelonnée en fonction de la capacité(DPT)and specific configuration requirements:
Base Configuration Tier Includes core cooler structure,grate modulesstandard drives,and basic control integration
Optional Features Available upgrades include advanced process control software packageshighefficiency fan impellers,and premium instrumentation suites
Service Packages We offer structured plansfrom annual inspectionand parts kits too comprehensive longterm service agreements(LTSAs)covering all mechanicaland electrical components
Financing Options Flexible capital expenditure solutions are available including traditional purchase equipment leasingand performancelinked financing structures where payments can be partially alignedwith verified efficiency gains

8 FAQ

Q What levelof modificationis requiredto retrofit this coolerto an existingkiln line?
A Retrofit engineeringis a core competency.The interface at the kiln hoodis carefully designedto match existing geometry Minimal disruptionto foundation structuresis targetedwith most work occurringduring planned major kiln shutdowns

Q How doesthe adaptive airflowcontrol impactoperator workload?
A The system operatesautomaticallybasedon set parametersand feedbackloops reducingthe needfor manual damper adjustmentsby operators This allows personnelto focuson monitoringoverall system healthratherthan constant tuning

Q Are spare parts forgrate plates standardizedor custom?
A We utilizea modular designwith standardizedinterchangeableplate sizeswithin eachcooler model This drastically simplifiesinventory managementfor plantsand ensuresglobal availabilityof critical wear parts

Q Whatisthe typicalinstallationand commissioningtimelinefor anew greenfieldcooler?
A Fora full greenfield installationmechanical erectionrequiresapproximately1620 weeksfollowing foundation readiness Electricaland automation integrationadds46 weeks Commissioningand performance guaranteetesting typically takes34 weeks

Q Do you provideperformance guarantees?
A Yes we offer contractual guaranteeson key metricsincluding specificair volumeclinker outlet temperature heat recovery efficiencyand total power consumption subjectto agreedupon baseline conditions