Introduction
This rapid repair castable is engineered specifically for blast furnace hearth reconditioning. Formulated with high-quality corundum and silicon carbide, and bonded with nano-sol technology, it eliminates free water to enable fast drying and dense structure formation. The material pumps easily and exhibits excellent adhesion to residual carbon bricks without requiring a filler layer, ensuring superior heat transfer efficiency. It forms a protective slag/iron layer that shifts the 1150°C isotherm inward, significantly extending hearth campaign life.
Key Advantages
01
Strong Adhesion to Carbon Bricks
Nano-sol bonding ensures excellent bonding to residual carbon bricks, eliminating the traditional filler layer and avoiding “gap thermal resistance” issues for improved heat transfer efficiency.
02
Fast Drying & Dense Structure
Free of added water, this castable allows rapid drying and forms a dense matrix with low porosity, high strength, and excellent thermal conductivity for reliable performance.
03
Superior Erosion & Thermal Shock Resistance
Engineered with corundum and silicon carbide, it resists molten iron and slag erosion while withstanding severe thermal cycling, ensuring long-term durability in the hearth.
Specification
| Property | JH-BFG-10 |
| Chemical composition (wt%) | Al₂O₃: ≥ 70 |
| SiC+C: ≥ 12 | |
| CaO: ≤ 0.5 | |
| Bulk density (g/cm³) ≥ | 2.80 (1400°C × 3h) |
| Linear change (%) | -0.5 ~ +0.5 (1400°C × 3h) |
| Modulus of rupture (MPa) ≥ | 10 (1400°C × 3h) |
| Cold crushing strength (MPa) ≥ | 50 (1400°C × 3h) |
Packaging: Woven bag; 1000kg/bag, 500kg/bag, 50kg/bag, 25kg/bag.
Precautions: Keep dry. Do not use if caked.
Shelf life: 6 months
