The main raw material of Phosphate Bonded High Alumina Bricks is dense super-grade or first-grade high-alumina bauxite clinker, which is an unburned brick and has superior quality compared with ordinary high-aluminum bricks. The binder is a phosphoric acid solution or an aluminum phosphate solution, and after being subjected to a semi-dry press molding, heat treatment is performed at 400 to 600 ° C to prepare a chemically bonded refractory product.
Phosphate Bonded High Alumina Brick for Sale in RS
Due to Phosphate Bonded High Alumina Bricks, it is a non-burnt bricks. In order to avoid shrinkage during high-temperature use, it is necessary to introduce heat-expandable raw materials such as kyanite, sillimanite, pyrophyllite and silica.
The ordinary high alumina brick is immersed in a phosphate or phosphoric acid solution, and after a certain period of time, it is taken out from the phosphate solution or the phosphoric acid solution. Through experimental determination, we found that the high aluminum brick after immersion has a load softening temperature rising. The porosity is reduced, the bulk density is increased, and the bending strength is significantly improved. Therefore, phosphate (or phosphoric acid) can improve the quality of high alumina bricks and extend their service life.
Compared with the fired high alumina brick combined with ceramics, it, the Special High Alumina Brick has better peeling resistance. This kind of high alumina bricks are suitable for cement kiln, electric furnace roof, ladle and so on.
Physical and chemical indicators of Phosphate Bonded High Alumina Bricks
|Al2O3 (%) ≥||75||75||80|
|FeO2 (%) ≤||2.1||2.1||1.8|
|Bulk Density (g/cm3) ≥||2.7||2.75||2.9|
|Cold Crushing Strength (MPa) ≥||70||75||80|
|0.2MPaSoftening Temperature Load Degree T0.6 (℃) ≥||1350||1300||1520|
|Thermal Shock Resistance(1100℃) Water Quenching (Cycle) ≥||20||20||15|
Phosphate Bonded High Alumina Bricks Price
Rongsheng refractory manufacturer has independent production plant and raw material collection place. The quality of our refractory brick has passed ISO Quality Certification. Our refractory products have been sold to more than 60 countries around the world and are recognized by our customers. If you have a need or have questions about Phosphate Bonded High Alumina Bricks, please contact RS Refractory Supplier and we will be happy to help you.