Corundum Castables are high-grade monolithic refractory materials produced with high-purity corundum aggregate and micro-powder, compounded with high-strength hydraulic binders and composite functional additives. The materials are precisely proportioned and mixed into dry powder, which can be water-mixed, poured and vibrated on-site to form integrated furnace lining. Different from ordinary high alumina castables, it possesses ultra-high refractoriness and superior corrosion resistance for severe high-temperature working conditions.
Key Features：
- Ultra-high refractoriness and excellent hot modulus of rupture, stable strength under long-term ultra-high temperature.
- Outstanding resistance to molten steel erosion, alkaline slag penetration and high-temperature scouring.
- Extremely low impurity content, stable chemical performance without high-temperature decomposition.
- Dense structure and low porosity, effectively resist gas permeation and lining peeling.
- Superior volume stability, no shrinkage or deformation during repeated heating and cooling.
- Long service life in harsh metallurgical and petrochemical high-temperature zones.
Available Grades：
Grade A90: Al₂O₃ ≥90%
Grade A95: Al₂O₃ ≥95%
Grade A99: Al₂O₃ ≥99%
Main Applications：
- Steel tundish working lining, continuous casting runner and ladle integral lining.
- High-temperature section of petrochemical reformers and hydrogen production furnaces.
- Waste incinerator lining, high-corrosion and high-wear industrial furnace zones.
- Special high-temperature kilns requiring high-purity refractory lining.
- Precast high-temperature refractory components for industrial furnaces.
Available Sizes & Packing：
Packing: 1MT ton bags, 25 kg bags or on request.
COA certificate provided per batch.
Specification:
Chemical Composition | A90 | A95 | A99 |
Al₂O₃ | 90% min | 95% min | 99% min |
SiO₂ | 7.0% max | 2.5% max | 0.5% max |
Fe₂O₃ | 1.0% max | 0.8% max | 0.2% max |
Bulk Density (after curing) | 2.75 g/cm³ min | 2.90 g/cm³ min | 3.05 g/cm³ min |
*Specifications and Sizes can be customized upon request.
Available Sizes & Packing：
Packing: 1MT ton bags, 25 kg bags or on request.
COA certificate provided per batch.