The most widely used is ZrO2 33% -41% fused zirconia corundum brick, the material has good corrosion resistance,
The tendency to generate small bubbles is small and does not seep out of the glassy phase. The corresponding national brands are shown in Table 1. The chemical composition of fused zirconia corundum bricks is shown in Table 2. The crystal phase composition of the fused zirconia corundum brick is shown in Table 3.
The higher the temperature of the fused zirconia corundum brick, the greater its electrical conductivity. The conductivity of zirconium alumina bricks with various ZrO2 contents is different. Usually when the ZrO2 content decreases, the resistivity increases. When the temperature is 1400, the conductivity of the ZrO232%-containing brick is 10 times higher than that of the ZrO2 53%~55% brick, and when the temperature is 400, it is 100 times.
Specification of AZS block | AZS 33 | AZS 36 | AZS 41 | ||
Chemical | Al2O3 | Remain | Remain | Remain | |
ZrO2 | 32-34% | 35-37% | 40-42% | ||
SiO2 | Less than 16.0% | Less than 14.0% | Less than 13.0% | ||
Na2O | Less than 1.5% | Less than 1.6% | Less than 1.3% | ||
Fe2O3+TiO2+CaO+MgO+Na2O+K2O+B2O3 | Less than 2.5% | Less than 2.5% | Less than 2.5% | ||
Bulk density (dense part) | 3.85g/cm 3 | 3.95g/cm 3 | 4.0g/cm 3 | ||
Apparent porosity (dense part) | Less than 2.0.% | Less than 1.5.% | Less than 1.3.% | ||
Anti-corrosion rate of glass liquid (soda-lime glass, 1500 Celsius 36h) | Less than 1.6mm/24h | Less than 1.5mm/24h | Less than 1.3mm/24h | ||
Bubbling tendency (soda-lime glass, 1300 Celsius 10h) | Less than 2.0% | Less than 1.5% | Less than 1.0% | ||
Exudation temperature of glass phase | More than 1400 Celsius | More than 1400 Celsius | More than 1400 Celsius | ||
Volume | Normal casting and tilting casting (RC or TC) | 3.4g/cm 3 | 3.45g/cm 3 | 3.55g/cm 3 | |
End casting (EC) | 3.6g/cm 3 | 3.7g/cm 3 | 3.8g/cm 3 | ||
Void free casting (VF) | 3.8g/cm 3 | 3.9g/cm 3 | 3.95g/cm 3 | ||
HOME