High-Quality Fused Cast α-Alumina Block (RTK-A) from China Suppliers & Factory for Superior Wear Resistance
Brief Introduction
Chemical Composition
| CHEMICAL COMPOSITION | TYPICAL VALUE |
|---|---|
| Al₂O₃ % | 98.0 |
| Na₂O % | 1.0 |
| SiO₂ + CaO + Fe₂O₃ + TiO₂ % | ≤ 1.0 |
Physical Property
| PHYSICAL PROPERTY | TYPICAL VALUE |
|---|---|
| Bulk density (dense part) g/cm³ | 3.4 |
| Normal temperature compression resistance MPa | 280 |
| Load softening start temperature (0.2 MPa) ℃ | 1700 |
| CALCULATE SPECIFIC GRAVITY | TYPICAL VALUE |
| PT g/cm³ | 3.1 |
| WS g/cm³ | 3.3 |
Frequently Asked Questions (FAQ)
They are made from high-purity alumina raw materials melted in an electric arc furnace at extreme temperatures exceeding 2000℃, resulting in low impurity levels and minimal matrix glass phase.
Based on the crystal phase structure of α-alumina and β-alumina ratios, they are classified into α-β corundum brick (RTK-M), β-corundum brick (RTK-H), and α-corundum brick (RTK-A).
RTK-A consists of nearly 100% α-alumina, providing a highly compact crystalline structure, exceptional chemical stability, strong alkali resistance, and superior slag corrosion resistance compared to other aluminum silicate products.
RTK-A is an ideal material for skid roll bricks in metallurgical heating furnaces, metallurgical electrolyzers, and specialized high-wear areas in glass furnaces.
Because they are manufactured using high-purity raw materials containing almost no matrix glass phase, preventing foreign phase leaching and providing excellent low contamination to molten glass.
RTK-A features a cold compression resistance of 280 MPa, a bulk density of 3.4 g/cm³ in its dense part, and a load softening starting temperature of 1700℃ at 0.2 MPa.