CementClinker Cooler
Clinker cooler grate plate (moving grate cooler)
Grate plates operate at 600–1000°C in clinker flow. High thermal shock + abrasion environment. Material selection: hotter zones = higher Ni content. Slot pattern controls clinker flow. LOMA / IKN / FLSmidth grate coolers – OEM drawing controlled. Casting quality (no cracks) critical – thermal shock will propagate existing defects.
Specifications
Material
Heat-resistant cast steel: Cr25Ni12 (HH grade); Cr35Ni25 (HP grade); 25Cr-20Ni for >1000°C zones; Martensitic Cr28 for cooler end
Material Class
Cast SteelHeat-resistant
Service Conditions
abrasion
OEM References
FLSmidth
Common Processes
Sand casting (resin / no-bake for complex grate geometry); heat treat (solution anneal for austenitic)
NDT & Inspection
Chemical analysis (Cr, Ni content); VT (cracks, cold shuts – common in heat-resistant alloys); dimensional (slot pattern, thickness); high-temp oxidation coupon test (where new alloy)
Typical Specs & Notes
Grate plates operate at 600–1000°C in clinker flow. High thermal shock + abrasion environment. Material selection: hotter zones = higher Ni content. Slot pattern controls clinker flow. LOMA / IKN / FLSmidth grate coolers – OEM drawing controlled. Casting quality (no cracks) critical – thermal shock will propagate existing defects.
⚠ Caveats
Casting quality (no cracks) critical – thermal shock will propagate existing defects.