Glossary
Materials and construction
High-alumina refractory
Also known as high-alumina brick, high alumina refractory.
High-alumina refractory bricks contain 60–95% Al₂O₃ and serve in the highest-temperature zones of cement rotary kilns, lime kilns and metallurgical furnaces. The high alumina content provides superior resistance to slag attack and basic-chemistry erosion compared with conventional silica-alumina refractories.
Where it serves
- Cement kiln burning zone — direct contact with clinker and combustion gas at 1,450 °C+
- Calciner — high-temperature, AFR-driven aggressive chemistry
- BOF and EAF linings
- High-temperature waste-heat boilers in metallurgical service
Related terms
Related terms
- Refractory (castable and brick)Refractory linings — castable cement-bonded mixes and pre-formed bricks — protect the steel shells of boilers, kilns and process vessels from high-temperature gas and slag attack.
- Rotary kilnA rotary kiln is a long inclined rotating cylinder where preheated raw meal is burned at 1,450 °C to form clinker. The heart of every cement plant.
- CalcinerA calciner is a combustion chamber in the cement preheater tower where raw meal is pre-calcined (CaCO3 → CaO) before entering the rotary kiln. Common site for AFR firing.