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Low Porosity Fire Clay Brick from China Factory - Reliable Suppliers for High-Quality Refractory Materials
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% (Grade I) or ≤15% (Grade II), compared to ≥22% for common clay bricks. Lower porosity means fewer internal voids, which reduces heat loss, prevents penetration by molten glass or slag, and significantly extends the service life of furnace linings.
Q
What is the maximum operating temperature for low-porosity clay bricks?
The refractoriness under load (0.2 MPa, 0.6% deformation) for our premium low-porosity clay bricks reaches ≥1500°C, making them suitable for sustained use in high-temperature industrial environments such as blast furnaces, glass melting furnaces, and ceramic sintering kilns.
Q
Which industries are low-porosity clay bricks most suitable for?
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 generation (boilers), and waste incineration facilities. Their versatility makes them ideal for any application requiring stable performance under high heat and corrosive conditions.
Q
How do low-porosity clay bricks compare to common clay bricks in terms of strength?
Low-porosity clay bricks offer a cold crushing strength of ≥70 MPa (Grade I) versus only ≥30 MPa for common clay bricks — more than twice the compressive strength. This superior mechanical performance ensures structural integrity under the mechanical stresses and thermal cycling typical of industrial furnace operations.
Q
Can low-porosity clay bricks be customized to specific dimensions or shapes?
Yes. We support both standard and semi-customized manufacturing requirements. Our products can be produced in various shapes and dimensions to meet the specific design needs of your furnace or kiln lining. Please contact our technical team with your project specifications for a tailored solution and accurate quotation.
Q
What quality certifications and after-sales support do you provide?
Every batch of our low-porosity clay bricks undergoes strict quality control from raw material selection through to finished product testing, in compliance with international refractory standards. Each shipment is accompanied by a detailed quality inspection report. We also offer comprehensive professional technical support and after-sales service to assist with installation guidance and any application challenges you may encounter.