Zhengzhou Tyreen Refractory Co.,Ltd
Product Introduction
Anti spalling high alumina brick, also known as anti spalling brick or anti spalling refractory brick, is a specially developed high alumina refractory brick with improved thermal shock resistance and spalling resistance.
It uses high alumina clinker as the main raw material and introduces a controlled amount of zirconium oxide (ZrO₂), together with composite binders and additives. Through optimized raw material grading, molding and high-temperature firing, the brick obtains a special microstructure that improves resistance to thermal stress and crack propagation.
Compared with conventional high alumina bricks, anti spalling high alumina bricks are more suitable for furnace areas exposed to frequent temperature fluctuations, rapid heating and cooling cycles, and severe thermal stress.
Tyreen Refractory manufactures anti spalling high alumina bricks for cement kilns and other high-temperature industrial applications.
Technical Characteristics
Excellent Thermal Shock Resistance
The main feature of anti spalling high alumina brick is its excellent thermal shock resistance.
During operation, refractory linings may experience repeated temperature changes, which can cause internal stress and brick cracking. The addition of ZrO₂ improves the microstructure of the brick and helps absorb and release thermal stress, reducing crack formation and improving service life.
Improved Spalling Resistance
The anti spalling performance is mainly related to the distribution of zirconia, corundum and mullite phases inside the brick.
The optimized structure forms a composite reinforcement system. Microcracks generated around ZrO₂ particles can help release stress and prevent crack expansion, which improves resistance to peeling and structural damage.
High Temperature Stability
Anti spalling high alumina bricks have:
- High refractoriness
- High load softening temperature
- Stable volume at high temperature
- Good mechanical strength
They can maintain reliable performance under long-term high-temperature operation.
Good Chemical Stability
The bricks provide good resistance against chemical erosion and are suitable for applications where refractory linings are exposed to clinker, dust and other corrosive environments.
Technical Data
| Item | Specification |
|---|---|
| Refractoriness | Up to 1850℃ |
| Cold Crushing Strength | ≥60 MPa |
| Flexural Strength | ≥50 MPa |
| Peeling Rate | ＜0.3% (1000℃) |
| Chemical Stability | Excellent |
Technical data may vary according to different grades and customer requirements.
Standard Sizes
The standard size of anti spalling high alumina brick is:
230 × 114 × 65 mm
Other sizes and special shapes can be manufactured according to customer drawings and furnace design requirements.
Manufacturing Principle
The anti spalling performance of this refractory brick is achieved through microstructure optimization.
During production, zirconium-containing materials are introduced into the high alumina brick composition. After high-temperature firing, ZrO₂, corundum and mullite phases form a reinforced structure.
The phase transformation characteristics of zirconia and the controlled microcrack structure help improve thermal stress distribution, resulting in better thermal shock resistance and spalling resistance.
Typical Applications
Anti spalling high alumina bricks are widely used in areas where refractory linings experience frequent thermal cycling.
Cement Kilns
Typical applications include:
- Transition zone
- Decomposition zone
- Cooling zone
- Safety zone
- Kiln hood
- Cooler rear wall and side wall
They are especially suitable for new dry process cement kilns, shaft kilns and wet process kilns.
Other Industrial Furnaces
Anti spalling high alumina bricks can also be used in:
- Lime kilns
- High-temperature industrial furnaces
- Furnace areas requiring high thermal shock resistance
Available Manufacturing Options
Tyreen Refractory can supply anti spalling high alumina bricks according to different application requirements.
Available options include:
- Customized dimensions
- Special brick shapes
- Different alumina content grades
- Export standard packaging
Customers can provide drawings or furnace conditions for technical recommendation.
