What is the pressure weight that high alumina bricks can withstand?
1. Overview of high alumina brick indicators
The compressive strength of high alumina bricks is a physical indicator, but in actual production and use, the compressive strength is an indicator that is easily achieved. The most difficult indicator to achieve is load softening temperature.
2. Determine the different levels and quality of high alumina firebricks
This depends on the different levels and quality of high alumina bricks. Because high-alumina bricks are formed under high pressure and fired at high temperatures, they have high fatigue resistance. Different qualities can withstand different pressures.
The compressive strength of first-grade high alumina refractory bricks is around 60Mpa. This indicator is easy to achieve because of the raw materials of high alumina fire bricks and a series of measures and firing temperatures during the production process. If it is a super-specific high-alumina brick, because it cannot be machine-formed, the compressive strength will be relatively lower by about 5MPa.
The compressive strength of secondary high aluminum fire bricks is about 55MPa, and the strength of handmade bricks and super-specific bricks is between 45-50MPa. The compressive strength of third-grade high alumina bricks is about 50MPa, and the strength of handmade bricks and special-shaped bricks is about 40MPa.
Of course, if it is a peel-resistant high-alumina brick, the strength will be greater than 70MPa due to the addition of zirconium. Bricks with an aluminum content of 80% will also have a strength greater than 65MPa.
3. The higher the strength, the greater the pressure it can withstand.
Bricks with higher strength can withstand external impact, friction, and compression more strongly. In other words, the higher the strength, the longer the service life. So the pressure is greater.
The compressive strength is the ultimate load that a three-dimensional sample area of a specified size can withstand without being destroyed at a certain high temperature. Compressive strength determines the bearing capacity of refractory bricks. Therefore, the higher the intensity, the greater the pressure.
4. How to define the load-bearing pressure of high alumina bricks
So in practical applications, how to define the load-bearing pressure of high alumina refractory firebricks? Under normal circumstances, a compressive strength of 1MPa can withstand a pressure equivalent to 10 kilograms, that is, 10 times the compressive strength is the pressure weight it can withstand.
