Article Navigation
- Overview & Composition
- Types & Technical Specifications
- Industrial Applications
- Procurement Strategies
- Why Choose Kerui?
1. Overview & Composition
Basic refractory are high-temperature materials primarily composed of magnesia (MgO) and calcia (CaO), known for their exceptional resistance to alkaline environments and molten metals. With service temperatures up to 1,800°C, they are indispensable in steelmaking, cement production, and non-ferrous metallurgy. Kerui Refractory’s basic refractories are engineered to deliver:
- Superior Slag Resistance: Neutralize acidic slags (SiO₂, Al₂O₃) in steel ladles and converters.
- Thermal Stability: Low thermal expansion (<1.5%) minimizes structural stress during thermal cycling.
- Hydration Resistance: Stabilized formulations prevent CaO/MgO hydration in humid conditions.
2. Types & Technical Specifications
2.1 Common Types of Basic Refractory
| Type | Key Components | Max Temp | Key Applications |
|---|---|---|---|
| Magnesia Bricks | MgO ≥90% | 1,700°C | Electric arc furnaces, AOD converters |
| Magnesia Chrome Bricks | MgO 60–70%, Cr₂O₃ 8–15% | 1,750°C | Cement rotary kilns, copper smelters |
| Dolomite Bricks | CaO 40–45%, MgO 30–35% | 1,650°C | Basic oxygen furnaces (BOFs), ladle linings |
| Magnesia Carbon Bricks | MgO 70–80%, graphite 10–20% | 1,600°C | Steel ladle slag zones, torpedo cars |
2.2 Kerui’s Performance Benchmarks
| Parameter | Kerui Magnesia Brick | Industry Standard | Test Method |
|---|---|---|---|
| MgO Content | ≥92% | 85–90% | XRF Analysis |
| Cold Crushing Strength | 60–120 MPa | 40–80 MPa | ASTM C133 |
| Refractoriness Under Load | 1,650°C | 1,550–1,600°C | ASTM C113 |
| Thermal Shock Resistance | >15 cycles (1,100°C ΔT) | 8–12 cycles | ASTM C1171 |
3. Industrial Applications
3.1 Steel Industry
- BOF Linings: Dolomite bricks resist basic slags (CaO-FeO-SiO₂) during oxygen blowing.
- Ladle Furnaces: Magnesia-carbon bricks prevent slag penetration in secondary refining.
3.2 Cement Production
- Rotary Kiln Transition Zones: Magnesia-chrome bricks combat alkali sulfate corrosion.
- Clinker Coolers: High-purity magnesia bricks withstand abrasive clinker particles.
3.3 Non-Ferrous Metallurgy
- Copper Converters: Magnesia-chrome bricks resist matte and slag erosion.
- Aluminum Recycling: Dolomite bricks handle molten aluminum’s reducing atmosphere.
4. Procurement Strategies
4.1 Cost & MOQ Overview
| Type | Price Range (FOB) | Min Order Quantity | Bulk Discounts (>20 tons) |
|---|---|---|---|
| Magnesia Bricks | $600–1,200/ton | 5 tons | 5–10% |
| Magnesia-Chrome Bricks | $1,500–2,800/ton | 3 tons | 8–12% |
| Dolomite Bricks | $450–900/ton | 10 tons | 5–8% |
4.2 Supplier Evaluation Checklist
- ✅ Certifications: ISO 9001, ASTM C455 (hydration resistance testing).
- ✅ Customization: Availability of non-standard shapes (e.g., wedge, arch).
- ✅ Sustainability: Hexavalent chromium-free magnesia-chrome alternatives.
4.3 Installation & Maintenance Tips
- Mortar Selection: Use magnesia-based mortar for joints ≤2mm.
- Preheating: Gradually heat to 600°C at ≤50°C/hour to avoid thermal cracking.
5. Why Choose Kerui?
5.1 Technological Leadership
- Hydration-Resistant Dolomite: Kerui’s KR-DM40 bricks feature phosphate stabilization, reducing hydration risk by 70%.
- Eco-Friendly Solutions: Chromium-free KR-MA85 magnesia-alumina bricks for cement kilns.
5.2 Global Service Excellence
- Rapid Production: 12,000-ton annual capacity ensures on-time delivery.
- Technical Support: Free kiln lining design optimization and failure analysis.
5.3 Success Story
A Middle Eastern steel plant using Kerui’s KR-MC75 Magnesia-Carbon Bricks achieved:
- 30% longer ladle lining lifespan (120 heats → 160 heats).
- 15% reduction in refractory costs per ton of steel.
Conclusion
Basic refractory are critical for industries operating in high-alkaline, high-temperature environments. Kerui Refractory combines 25+ years of expertise with cutting-edge manufacturing to deliver materials that excel in durability, thermal stability, and cost efficiency.
Act Now:
- 📩 Request a custom quote for tailored solutions.
- 📞 Contact +86-153 7871 8880 for technical consultations or samples.
Data based on ASTM standards and Kerui’s internal testing. Performance may vary by application.
