Phosphate Bonded High Alumina Bricks Core Feature:Chemical Bonding
Unfired Low-Temperature Treatment: This chemically bonded brick is made by phosphoric acid or aluminum phosphate solution as the binder, machine pressed and then heat-treated at 400–600°C, high-temperature sintering is not required.
Bonding Mechanism: Phosphate reacts with alumina to form an aluminum phosphate (AlPO4) compound, forming a high-strength chemical bond.
Excellent Physical Properties of Phosphate-Bonded High Alumina Bricks
Ultra-high wear resistance: Due to its high density (bulk density ≥ 2.65 g/cm³) and chemical bonding, it offers significantly better wear resistance than ordinary high-alumina bricks, making it suitable for high-wear areas.
Excellent thermal shock stability: With a high apparent porosity and low elastic modulus, it boasts a thermal shock resistance of >10 cycles (1100°C water-cooled), making it suitable for frequent start-stop conditions.
High Cold Crushing Strength: With a compressive strength of 70MPa to 150 MPa, it offers excellent mechanical shock resistance.
Chemical corrosion resistance: Exceptional resistance to alkali corrosion surpasses that of clay bricks and ordinary high-alumina bricks.
Applications of phosphate-bonded high-alumina bricks
Phosphate bonded high alumina bricks are suitable for industrial furnaces with dynamic heat loads, high wear, and frequent alkali corrosion. The specific applications are as follows:
| Industry | Application | Advantages |
| Cement | Rotary kiln transition zone cooling zone grate cooler kiln head cover | Resistant to material erosion alkali corrosion and thermal shock |
| Metallurgy | Electric furnace top coke oven combustion chamber | Resistant to high temperature airflow impact and peeling |
| Chemistry Furnace | Phosphorus chemical kilns (such as calcium phosphate kilns) secondary combustion chambers of waste incinerators | Acid atmosphere corrosion resistance thermal shock resistance |
| Lime | High temperature zone transition zone | Resistant to lime erosion micro expansion reduces lining cracking |
| Power Industry | Circulating fluidized bed boiler lining | Wear-resistant and fly ash-resistant |
Phosphate-bonded wear-resistant high-alumina bricks have the core advantages of no-burning process, ultra-high wear resistance, thermal shock resistance and alkali corrosion resistance, making them the preferred material for dynamic working conditions such as cement rotary kiln transition zones and grate coolers.
JHYRef can provide high-performance phosphate-bonded high-alumina bricks. If you have any other questions, feel free to contact us! We are always available to provide free consultation services.
