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Parameters
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Comments
ZrO2,% ≥: | 33 | SiO2,% ≤: | 16.0 |
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Na2O,% ≤: | 1.5 | Bulk Density(g/cm3):: | 3.5-3.6 |
Cold Crushing Mpa: | 350 | Exudation Temp. Of Glass Phase: | 1400 |
Features For Corundum Fire Brick:
1. Raw material is corundum and baddeleyite eutecticum,high compression strength
2. Top high-temperature capablility.
3. Excellent thermal stability.
4. Low thermal conductivity
5. Powerful penetrating-proof capability.
6. Good erosion-resistance.
7. Strong resistant erosion stability to the glass liquid
Process For Corundum Fire Brick :
Made of the zirconite (Industry zirconia ) and industry alumina as the mainly mixed raw material, melting in the electric furnace, casting, annealing, machining, then finished.
Physical and Chemical Indicators For Corundum Fire Brick :
chemical composition | AZS-33 | AZS-36 | AZS-41 |
ZrO2 | ≥33 | ≥35 | ≥40 |
SiO2 | ≤16.0 | ≤14 | ≤13.0 |
Al2O3 | a little | a little | a little |
Na2O | ≤1.5 | ≤1.6 | ≤1.3 |
Fe2O3+TiO2 | ≤0.3 | ≤0.3 | ≤0.3 |
Physical Properties
Bulk density(g/cm3): | 3.5-3.6 | 3.75 | 3.90 | |
Cold crushing Mpa | 350 | 350 | 350 | |
Thermal expansion coefficient (1000°C) | 0.80 | 0.80 | 0.80 | |
Exudation temp. of glass phase | 1400 | 1400 | 1400 | |
Corrocion resistance of glass melt(mm/24h) | 1.6 | 1.5 | 1.3 | |
Density | PT QX | 3.40 | 3.45 | 3.55 |
WS ZWS | 3.60 | 3.70 | 3.8 |
Phase composition(%)
Baddeleyite | 32 | 35 | 40 |
Glass phase | 21 | 18 | 17 |
α- corundum | 47 | 47 | 43 |