Thermal Shock Resistant High Alumina Brick
High-alumina brick with improved spalling resistance
Application
Especially suitable for the transition zone, calciner, and tertiary air duct of rotary cement kilns, as well as the medium-temperature zone of glass furnace regenerators.
Description
The high-alumina bricks with enhanced spalling resistance produced by our company are manufactured using high-grade bauxite clinker as the primary raw material, with the addition of ‘three minerals’ (sillimanite/andalusite/kyanite) or ZrO₂ in specific proportions, through high-pressure forming processes.Specifications
| Item | RSYRS-70 | RSYRS-75 |
|---|---|---|
| Al2O3 % ≥ | 70 | 75 |
| ZrO2 % ≤ | 6-8 | – |
| Refractoriness °С ≥ | 1790 | 1790 |
| Bulk density г/см3 ≤ | 2,5 | 2,6 |
| Apparent porosity % ≤ | 24 | 23 |
| CCS Mpa ≥ | 60 | 70 |
| RUL 0.2 Mpa °С ≥ | 1470 | 1520 |
| Thermal shock resistance (1100°C, water) ≥ | 30 | 25 |
Features
- High cold crushing strength at room temperature
- High structural strength at elevated temperatures
- Corrosion resistance against potassium, sodium, sulfur, chlorine, and alkaline salts
- Low thermal conductivity
Applications
- Rotary cement kilns: transition zone, calciner and tertiary air duct, kiln hood, cooler
- Glass melting furnaces: medium-temperature zone
- Steelmaking: tundish nozzles, center tubes, star gates, siphon tubes, pocket blocks
- Ladles: lining, stoppers, well blocks
- Non-ferrous metallurgy (copper, aluminum, zinc): flue and duct lining, heat exchanger zones, afterburning chambers