Do you know these important characteristics of zirconium corundum bricks？
Date:2020-02-05 12:12 From:Zhengzhou Sunrise Refractory Author:admin
Zirconium corundum brick is a white solid
which is formed by pure alumina powder and zircon sand containing 65% of zirconia and 34% of silica after being melted and internalized in an electric furnace.
The eutectoid of corundum and zirconite and the glass phase consist of the eutectoid of corundum phase and zirconite phase, and the glass phase is filled between their crystals.
1， Electrical insulation
When using all-electric melting and electric fluxing methods, electrode bricks are required to have good electrical insulation at high temperatures. Zirconium corundum bricks have good electrical insulation properties and decrease with increasing temperature. It can be seen that zirconium corundum bricks can be used as electrode bricks in the production of soda-lime glass pool furnaces. However, when producing high borosilicate glass, azs-41 or zircon bricks are used. Otherwise, not only the power consumption cannot be controlled, but also the bricks will be melted, the electrodes will be damaged, and the glass liquid will be polluted.
2. Thermal conductivity
The thermal conductivity of hafnium-zirconium corundum bricks is twice that of clay bricks. Therefore, when this kind of pool wall brick is used, the amount of cooling air required near the liquid surface should be twice as large as that of clay bricks. In order to achieve the effect of sufficient cooling, the advantages of zirconium corundum bricks are brought into full play.
3, the difference between azs fused brick and al2o3 fused brick
使 The resistance to glass erosion at high temperatures is as follows: azs-41 #> azs-36 #> azs-33 #> α-β-a12o3, but the anti-pollution resistance of azs bricks is not as good as alumina-based electroformed bricks. This is because alumina-based electroformed bricks are very pure, and more than 90% of them are al2o3. The viscosity of the nepheline metamorphic layer generated on the surface of the brick in the liquid glass is not as high as that of the zro2 metamorphic layer. Melt, so the corrosion resistance at high temperature is not as good as azs electric melting brick. However, the larger the difference between the viscosity of the impurities flowing into the glass liquid and the glass liquid is, the more difficult it is to dissolve and eliminate. The alumina brick ’s metamorphic layer of viscose has a low viscosity and is easily soluble in the glass liquid, so the pollution to the glass liquid is small.
The above are the precautions when using zirconium corundum bricks. If you want to know more, you can log in to the website to view, please call to discuss!
If you are interested in our fused azs bricks, or need other types of refractory materials, please contact our Tianyang Refractory Group, we will definitely provide you with the best quality refractory materials and the most reasonable quotation.
which is formed by pure alumina powder and zircon sand containing 65% of zirconia and 34% of silica after being melted and internalized in an electric furnace.
The eutectoid of corundum and zirconite and the glass phase consist of the eutectoid of corundum phase and zirconite phase, and the glass phase is filled between their crystals.
1， Electrical insulation
When using all-electric melting and electric fluxing methods, electrode bricks are required to have good electrical insulation at high temperatures. Zirconium corundum bricks have good electrical insulation properties and decrease with increasing temperature. It can be seen that zirconium corundum bricks can be used as electrode bricks in the production of soda-lime glass pool furnaces. However, when producing high borosilicate glass, azs-41 or zircon bricks are used. Otherwise, not only the power consumption cannot be controlled, but also the bricks will be melted, the electrodes will be damaged, and the glass liquid will be polluted.
2. Thermal conductivity
The thermal conductivity of hafnium-zirconium corundum bricks is twice that of clay bricks. Therefore, when this kind of pool wall brick is used, the amount of cooling air required near the liquid surface should be twice as large as that of clay bricks. In order to achieve the effect of sufficient cooling, the advantages of zirconium corundum bricks are brought into full play.
3, the difference between azs fused brick and al2o3 fused brick
使 The resistance to glass erosion at high temperatures is as follows: azs-41 #> azs-36 #> azs-33 #> α-β-a12o3, but the anti-pollution resistance of azs bricks is not as good as alumina-based electroformed bricks. This is because alumina-based electroformed bricks are very pure, and more than 90% of them are al2o3. The viscosity of the nepheline metamorphic layer generated on the surface of the brick in the liquid glass is not as high as that of the zro2 metamorphic layer. Melt, so the corrosion resistance at high temperature is not as good as azs electric melting brick. However, the larger the difference between the viscosity of the impurities flowing into the glass liquid and the glass liquid is, the more difficult it is to dissolve and eliminate. The alumina brick ’s metamorphic layer of viscose has a low viscosity and is easily soluble in the glass liquid, so the pollution to the glass liquid is small.
The above are the precautions when using zirconium corundum bricks. If you want to know more, you can log in to the website to view, please call to discuss!
If you are interested in our fused azs bricks, or need other types of refractory materials, please contact our Tianyang Refractory Group, we will definitely provide you with the best quality refractory materials and the most reasonable quotation.