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1. Product Overview
Kerui Dolomite Brick is a premium refractory material manufactured from high-purity dolomite (CaMg(CO₃)₂) through advanced calcination and stabilization processes. Designed for extreme alkaline environments, it combines excellent slag resistance with thermal stability up to 1,700°C, making it ideal for basic oxygen furnaces (BOFs), electric arc furnaces, and secondary metallurgy applications.
2. Key Performance Indicators
Technical Highlights
- High CaO/MgO Ratio: Balanced composition (CaO 40–45%, MgO 30–35%) for optimal slag resistance.
- Low Hydration Tendency: Stabilized matrix prevents free CaO hydration.
- Thermal Shock Resistance: Withstands rapid temperature fluctuations in steelmaking processes.
| Parameter | Standard Grade | Premium Grade | Test Standard |
|---|---|---|---|
| Al₂O₃ Content | ≤2.5% | ≤1.8% | XRF Analysis |
| Fe₂O₃ Content | ≤3.0% | ≤2.0% | XRF Analysis |
| Apparent Porosity | 12–18% | 8–12% | ASTM C20 |
| Cold Crushing Strength (CCS) | 35–50 MPa | 50–80 MPa | ASTM C133 |
| Refractoriness Under Load (RUL) | 1,650°C | 1,700°C | ASTM C113 |
3. Product Features
3.1 Enhanced Durability
- Tar-Impregnated Variant: Reduces porosity to <10% for improved corrosion resistance against basic slags.
- Stabilized Matrix: Phosphorus additives inhibit C₂S crystal transformation, ensuring long-term structural integrity.
3.2 Operational Efficiency
- Low Thermal Conductivity (1.2–1.8 W/m·K): Minimizes heat loss in furnace linings.
- Plasticity at High Temperatures: Accommodates thermal expansion stresses without cracking.
3.3 Environmental Compliance
- Hexavalent Chromium-Free: Meets EU REACH regulations for workplace safety.
- Recyclable: Spent bricks can be reprocessed into raw materials.
3.4 Customization Options
- Available in standard sizes (230×114×65mm) or tailored geometries for complex furnace profiles.
- Anti-hydration coatings for humid storage environments.
4. Industrial Applications
4.1 Steelmaking
- BOF Linings: Withstands 1,600–1,700°C molten steel and basic slags (lifetime: 500–800 heats).
- Ladle Slag Lines: Resists CaO-SiO₂-Al₂O₃ slag erosion in secondary refining.
4.2 Non-Ferrous Metallurgy
- Copper Smelting Furnaces: Stable performance in sulfur-rich atmospheres.
- Nickel Converter Linings: Resists high-MgO slags.
4.3 Cement Industry
- Lime Kiln Transition Zones: Compatible with high-alkali raw meal compositions.
Why Choose Kerui Dolomite Bricks?
- ISO 9001-Certified Production: Rigorous quality control from raw material selection to final sintering (1,600–1,750°C).
- Technical Support: 24/7 engineering consultation for installation and maintenance optimization.
- Global Logistics: Bulk orders delivered within 15–30 days worldwide.
Explore tailored solutions for your furnace at Kerui Refractories.
Data sourced from Kerui laboratory tests and industry applications. Actual performance may vary based on operational conditions.
