Guidelines for Refractory Configuration of New Lime Kilns - Your Refractory Bricks, Castables Manufacturer For Kiln

The typical refractory materials required for different zones of a lime kiln are as follows:

Kiln Zone	Working Conditions	Common Refractories	Remarks
Kiln Head / Kiln Tail (High-Temperature Erosion Zone)	Direct flame impact, frequent temperature fluctuations	– High alumina bricks (Al₂O₃ ≥ 60%) – Magnesia-chrome bricks / Magnesia-hercynite bricks – High-strength wear-resistant castables	Withstand flame erosion and dust abrasion
Burning Zone (High-Temperature Zone, >1400℃)	Long-term high temperature, strong alkaline atmosphere	– Magnesia-hercynite bricks – Direct-bonded magnesia-chrome bricks (restricted for environmental reasons) – High-purity magnesia bricks	Excellent slag resistance, alkali resistance, thermal shock resistance
Transition Zone	Large temperature fluctuations, strong thermal stress	– High alumina bricks – Magnesia-alumina spinel bricks	Withstand rapid heating and cooling
Preheating / Cooling Zone	Medium-to-low temperature, high abrasion	– Fireclay bricks (Al₂O₃ 30–40%) – Lightweight insulation bricks / Ceramic fiber modules	Cost-effective, provide insulation
Auxiliary Parts (Flue, Combustion Chamber, etc.)	Secondary structures	– Castables / Plastics – Ceramic fiber boards, blankets	Used for insulation and energy saving

Material Selection Principles

High-temperature burning zone → Magnesia-based refractories (magnesia-hercynite, magnesia bricks)
Medium-temperature transition zone → High alumina bricks, magnesia-alumina spinel bricks
Low-temperature preheating / cooling zone → Fireclay bricks + insulation materials
Backup insulation layers → Lightweight insulation bricks, ceramic fiber products

KERUI Refractory supplies refractory bricks, refractory castables and other refractory and insulation materials for different types of high-temperature kilns and high-temperature pipelines. If you have any needs, please contact me and our technical engineers will be happy to serve you!