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Low Porosity Fire Clay Brick from China Suppliers - High-Quality Refractory Materials from Reliable Factory
Core Advantages
Low Porosity & Excellent Heat Insulation
Dense structure with porosity ≤18% effectively reduces heat loss, improves energy efficiency of equipment, and maintains stable temperature in high-heat environments.
Superior High-Temp Resistance
Maintaining structural integrity without deformation even under long-term high-temperature operation.
Strong Erosion Resistance
Resists erosion from flue gas, slag and chemical media, significantly extending the service life of furnace linings and reducing maintenance costs.
Wide Applicability
Compatible with multiple industrial scenarios, easy to install and construct, suitable for both standard and semi-customized requirements.
Product Parameters
| Item | Low-porosity Clay Brick | Common Clay Brick | |
| Al₂O₃ % | ≥45 | ≥42 | ≥42 |
| Fe₂O₃ % | ≤1.2 | ≤1.5 | ≤1.8 |
| Apparent Porosity % | ≤12 | ≤15 | ≤22 |
| Bulk Density g/cm³ | ≥2.37 | ≥2.30 | ≥2.15 |
| Cold Crushing Strength MPa | ≥70 | ≥60 | ≥30 |
| Permanent Linear Change % (1400℃ × 2h) | -0.1/+0.05 | -0.2/+0.0 | -0.4/+0.1 |
| Refractoriness Under Load ℃ (0.2MPa, 0.6%) | ≥1500 | ≥1470 | ≥1400 |
Detailed Application Scenarios
1
Metallurgical Industry
◎ Lining of blast furnace hot blast stoves, coke ovens, and steelmaking ladles. Resists high-temperature gas and molten steel erosion, ensuring stable production.
2
Glass & Ceramic Industry
◎ Kiln linings for glass melting furnaces and ceramic sintering kilns. Low porosity prevents glass liquid penetration and avoids product contamination.
3
Other Industrial Fields
◎ Lining of chemical reactors, thermal power plant boilers, and waste incinerators. Adapts to complex high-temperature and corrosive environments, reducing maintenance costs.
4
Quality Assurance
◎ We implement strict quality control throughout the production process, from raw material screening to finished product testing. Each batch of products complies with international refractory standards and is accompanied by a quality inspection report. We also provide professional technical support and after-sales service to solve your application problems.
Conclusion
Contact us now for a quote and experience the difference of working with the best in the business.
Frequently Asked Questions
Q
What is the apparent porosity of low-porosity clay bricks, and why does it matter?
Low-porosity clay bricks have an apparent porosity of ≤12% (premium grade) or ≤15% (standard grade), compared to ≥22% for common clay bricks. Lower porosity means reduced permeability to molten slag, glass liquid, and corrosive gases, which directly extends the service life of furnace linings and lowers long-term maintenance costs.
Q
What is the maximum service temperature for low-porosity clay bricks?
The refractoriness under load (0.2 MPa, 0.6% deformation) reaches ≥1500°C for the premium grade and ≥1470°C for the standard grade. This makes them suitable for long-term use in high-temperature industrial applications such as blast furnaces, glass melting furnaces, and ceramic sintering kilns.
Q
Which industries are low-porosity clay bricks most commonly used in?
Low-porosity clay bricks are widely used across multiple industries including metallurgy (blast furnace hot blast stoves, coke ovens, steelmaking ladles), glass and ceramics (melting furnaces, sintering kilns), chemical processing (reactors), thermal power (boilers), and waste management (incinerators). Their versatility makes them a reliable choice for any high-temperature and corrosive environment.
Q
How do low-porosity clay bricks compare to common clay bricks in terms of cold crushing strength?
Low-porosity clay bricks offer significantly higher cold crushing strength — ≥70 MPa (premium) and ≥60 MPa (standard) — compared to only ≥30 MPa for common clay bricks. This superior mechanical strength ensures the bricks can withstand the physical stresses of industrial furnace operation without cracking or crumbling.
Q
Do you provide quality inspection reports with your products?
Yes. Every batch of our low-porosity clay bricks undergoes strict quality control from raw material screening through to finished product testing. Each shipment is accompanied by a comprehensive quality inspection report that confirms compliance with international refractory standards, giving you full confidence in the product performance.
Q
Can low-porosity clay bricks be customized to meet specific project requirements?
Absolutely. Our low-porosity clay bricks are compatible with a wide range of industrial scenarios and are available in both standard dimensions and semi-customized specifications. Whether your project requires specific sizes, shapes, or performance parameters, our technical team can work with you to deliver the most suitable solution. Contact us to discuss your requirements and receive a tailored quote.