The Role Of Phosphate Refractory Bricks

Phosphate refractory bricks are a type of refractory material, mainly composed of phosphate compounds and high-temperature resistant materials. They are widely used in some high-temperature and acid-base corrosive occasions. At present, phosphate refractory bricks mainly include phosphate-bonded high-alumina bricks and phosphate-bonded high-alumina wear-resistant bricks. The phosphoric acid solution in the manufacturing process is about 42.5%-50%, and the alumina content of phosphate refractory bricks is generally 75%-77%. It has excellent high-temperature resistance and corrosion resistance.

The refractory temperature of phosphate refractory bricks can generally reach 1250℃-1350℃, which can withstand the high-temperature environment in the kiln. At the same time, it also has very good corrosion resistance, so it is often used in some environments with corrosive media to ensure the stability and service life of the kiln. Not only that, phosphate-bonded high-alumina refractory bricks show good thermal shock resistance. This means that they can withstand rapid temperature changes without cracking or peeling. This feature is essential for applications with frequent thermal cycles (such as furnaces or kilns). Not only that, it also has good wear resistance and can withstand abrasive forces and mechanical wear, which makes it very suitable for applications where bricks face high wear.

Since phosphate refractory bricks improve their corrosion resistance, they are often used in some corrosive occasions, such as blast furnaces, steelmaking furnaces, hot blast furnaces, glass kilns, electric furnace tops, etc. Taking cement kilns as an example, phosphate-bonded high-alumina bricks are often used in the firing zone, transition zone, cooling zone, cooler, kiln mouth, kiln tail, and other parts of cement rotary kilns, which can not only resist corrosive substances in cement kilns but also withstand the wear of the medium.