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Used as aggregates and powder in alumina-based and alumina-contai，ned refractories ,it has been widely used in metallurgical industry (such as ladle lining refractories , sliding plate , purging plug, well-block ,stopper , long nozzle and submerged entry nozzle for con-casting, etc.) and other industries like ceramics petrochemical, glass, etc.
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Product Description
【Chemical index】
Item | Specification | Typical values | |
Chemical compositon % | Al2O3 | ≥99.20 | 99.30 |
Na2O | ≤0.40 | 0.30 | |
SiO2 | ≤0.15 | 0.09 | |
Fe2O3 | ≤0.07 | 0.05 | |
Magntic Fe(%) | ≤0.02 | 0.01 | |
Bulk density（gcn3） | ≥3.50 | 3.55 | |
Apparent porosity(%) | ≤5.00 | 3.1 | |
Water absorption（%） | ≤1.50 | 0.90 | |