Industrial kilns operate in harsh environments characterized by high temperatures, severe corrosion, and frequent thermal shock, placing extremely high demands on the stability of refractory materials. Anti-spalling high-alumina bricks, with their superior performance, have become a core material for kiln linings, effectively ensuring production safety and efficiency.
1.Core characteristics of anti-stripping high alumina bricks
The core advantage of spall-resistant high-alumina bricks lies in their high alumina content. This composition imparts excellent refractoriness and high-temperature chemical stability, significantly resisting slag erosion.
anti-stripping high-alumina brick
Additionally, the unique mullite crystal structure significantly enhances the material’s spalling resistance during thermal cycling through intergranular strengthening.
Furthermore, the low porosity of the brick body effectively blocks furnace gas penetration, reducing the risk of oxidation spalling.
2.Performance advantages in kiln applications
Anti-spalling high-alumina bricks demonstrate significant advantages in high-temperature kilns such as steel reheating furnaces and cement rotary kilns.
First, their high thermal shock resistance allows them to withstand sudden temperature changes without cracking, extending the kiln’s maintenance cycle.
More importantly, the material maintains volume stability even at high temperatures, thus preventing structural deformation caused by uneven thermal expansion.
These characteristics directly reduce maintenance costs and improve kiln operation continuity.
3.Specific Applications
Anti-spalling high-alumina bricks are widely used in key areas of various high-temperature industrial kilns.
rotary kiln
Steel Industry: Primarily used in heating furnace roofs, transition zones of cement rotary kilns, and regenerators of glass melting furnaces. This material effectively resists high-temperature thermal stress, chemical corrosion, and mechanical wear.
Cement Industry: Primarily used as lining material for rotary kiln transition zones, kiln openings, high-temperature sections of coolers, and preheater rotors. They withstand high-temperature material abrasion, alkali-sulfur corrosion, and thermal shock.
Glass Industry: Applied in regenerator gratings, melting tank superstructures, and passageways. They resist erosion from high-temperature molten glass, fly ash, and frequent temperature fluctuations.
Chemical Industry: Used in linings of high-temperature reactors such as cracking furnace radiant sections, converters, and incinerators. They resist high-temperature gas corrosion, coking, and thermal cycling stress.
