SK-32 / SK-35Shaped refractories
JC-85 / JC-98Corundum brick
High-purity corundum brick with low porosity, high hot strength, volume stability and creep resistance.
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PRODUCT / JC-85 / JC-9801 / APPLICATION
Application and operating zones
Carbon-black reactors, petrochemical furnaces, ceramic and refractory tunnel kilns and other high-temperature units.
02 / TYPICAL DATA
Technical specifications
PropertyTypical value
Al₂O₃85-98.5%
Bulk density2.75-3.10 g/cm³
RUL @ 0.2 MPa1650-1700°C
GRADE COMPARISON
Grades and technical properties
For each shipment, composition, geometry, and guaranteed properties are fixed in the specification and batch quality certificate.
| Grade | Al₂O₃ | SiO₂ | Fe₂O₃ | Apparent porosity | Bulk density | Cold crushing strength | RUL @ 0.2 MPa |
|---|---|---|---|---|---|---|---|
| JC-98 | 98.5% | 0.3% | 0.2% | 18% | 3.10 g/cm³ | 90 MPa | 1700°C |
| JC-95 | 95% | 3.0% | 0.2% | 18% | 2.95 g/cm³ | 80 MPa | 1650°C |
| JC-90 | 90% | 9.0% | 0.5% | 18% | 2.90 g/cm³ | 80 MPa | 1650°C |
| JC-85 | 85% | 18% | 0.5% | 20% | 2.75 g/cm³ | 70 MPa | 1700°C |
Properties are shown as typical values. The operating grade and guaranteed values are selected for the service conditions and fixed in the supply specification.
