Application
Furnace walls and arches; hot-blast and high-temperature equipment, subject to zone design.
Aluminosilicate bricks
High-alumina brick — 75 grade
75-grade high-alumina refractory brick for industrial furnace lining discussions. Explore the catalogue data, common shapes and application options below.
At a glance
Options
Standard straights, wedges and drawing-based shapes
Selection key
Compare hot strength, creep and thermal cycling with the existing lining; do not select from alumina content alone.
Interested in this material?
Ask about product options or share your requirement. Drawings and complete specifications are optional at the first contact.
GRADE DATA
Technical specification
Catalogue reference
Reference values for initial comparison. Confirm the selected grade and test methods for an order. Refractoriness and RUL are not continuous service-temperature ratings.
| Property | 75 grade |
|---|---|
| Al₂O₃ (%) | ≥75 |
| Refractoriness (°C) | ≥1790 |
| RUL at 0.2 MPa (°C) | ≥1520 |
| Bulk density (g/cm³) | ≥2.45 |
| Apparent porosity (%) | ≤22 |
| Cold crushing strength (MPa) | ≥55 |
Parameters to include in your specification
- Chemical composition and impurity limits
- Bulk density, apparent porosity and cold crushing strength
- Refractoriness under load: load, endpoint and method
- Permanent linear change: temperature and holding time
- Dimensions, tolerances and joint design
SUPPLIED PRODUCT IMAGES
Product views
DOCUMENTS & DELIVERY
Discuss packing, documents & delivery
Prepare the delivery
Confirm shape drawings, dimensional tolerances, brick quantities and pallet marking. Keep the material dry and follow the agreed storage and installation instructions.
Agree the document set
Approved grade data, safety information, drawing revision, inspection records and batch identification as required by the order.
Related materials & systems
Silicon mullite brick
Aluminosilicate bricks
Cement-kiln transition zones; kiln hood, cooler and duct positions where the proposed shape and lining design are suitable.
- Al₂O₃ (%)
- ≥63
- SiC + SiO₂ (%)
- ≥30
- RUL at 0.2 MPa (°C)
- ≥1650
Catalogue reference values
Alkali-resistant brick
Aluminosilicate bricks
Cement preheaters, calciners and kiln-inlet systems, subject to operating conditions.
- Al₂O₃ (%)
- 25–30
- SiO₂ (%)
- 60–65
- RUL at 0.2 MPa (°C)
- ≥1300
Catalogue reference values