DH-155 High Alumina Checker Wall Brick
69% Al₂O₃ Low Creep Rate Refractory
Premium Industrial Refractory Solution for Hot Blast Furnace Regenerative Chambers
ISO 9001:2015 Certified | 15+ Years Experience | 200+ Projects Completed | Advanced Testing Laboratory
Product Overview
What is DH-155 High Alumina Checker Wall Brick?
DH-155 High Alumina Checker Wall Brick is a premium industrial refractory material with 69% Al₂O₃ content, specifically engineered for hot blast furnace regenerative chambers. This advanced checker brick serves as a heat-transfer medium and thermal storage carrier, designed to withstand extreme temperatures while maintaining structural integrity in demanding industrial applications.
Our DH-155 checker wall brick represents the pinnacle of refractory technology, combining high alumina content with ultra-low creep characteristics to deliver exceptional performance in industrial furnace environments. The brick functions as a heat carrier with excellent volume stability, superior high-temperature load creep properties, and optimal density characteristics.
Superior Thermal Performance
Ultra-low creep rate of ≤0.2% at 1550°C ensures dimensional stability under extreme thermal cycling conditions in regenerative chambers.
High Alumina Content
69% Al₂O₃ composition provides excellent refractoriness and resistance to thermal shock, making it ideal for high-temperature industrial applications.
Optimized Density
Bulk density ≥2.6 g/cm³ ensures optimal heat storage capacity and efficient thermal energy transfer in checker work applications.
Exceptional Strength
Cold crushing strength ≥60 MPa provides structural integrity and resistance to mechanical stress in industrial furnace environments.
Technical Specifications
| Physical Properties | Specification Value | Unit | Test Method |
|---|---|---|---|
| Apparent Porosity (AP) | ≤21 | % | ASTM C20 |
| Bulk Density (BD) | ≥2.6 | g/cm³ | ASTM C20 |
| Cold Crushing Strength (CCS) | ≥60 | MPa | ASTM C133 |
| Creep Rate (1550°C, 20-50h, 0.2MPa) |
≤0.2 | % | ASTM C832 |
| Chemical Component | Content | Unit | Analysis Method |
|---|---|---|---|
| Al₂O₃ (Alumina) | ≥69 | % | XRF Analysis |
| TiO₂ (Titanium Dioxide) | ≤0.6 | % | XRF Analysis |
| Fe₂O₃ (Iron Oxide) | ≤1.3 | % | XRF Analysis |
| K₂O + Na₂O (Alkali Oxides) | -- | % | XRF Analysis |
Performance Characteristics
High alumina bricks with 69% Al₂O₃ content demonstrate exceptional refractoriness under load, typically above 1420-1550°C, with performance increasing proportionally to alumina content. The creep resistance is significantly enhanced through controlled mullite formation in the matrix, which reduces glass phase content and improves high-temperature mechanical properties.
Industrial Applications
Checker bricks are widely utilized in the steel industry globally, primarily in the middle and upper sections of hot blast furnace regenerative chambers, where they play a crucial role in heat transfer and accumulation during the heating process.
Hot Blast Furnace Regenerative Chambers
Primary application in checker work systems where bricks store thermal energy during heating cycles and transfer heat to incoming air during blast periods.
Steel Industry Thermal Management
Specifically designed for applications above 900°C where high alumina content is essential for maintaining structural integrity.
Blast Furnace Wall Applications
Suitable for wall construction in blast furnaces where thermal cycling and mechanical stress resistance are critical requirements.
Glass Industry Regenerators
Effective in glass furnace regenerative systems where consistent thermal performance and chemical resistance are essential.
Operating Principles
Thermal Cycle Operation
- Heating Phase: High-temperature combustion gases pass through brick channels, transferring thermal energy to the brick matrix
- Heat Storage: Brick material stores thermal energy with minimal dimensional change due to low creep characteristics
- Heat Transfer: Cold air passes through heated bricks, absorbing stored thermal energy for furnace preheating
- Cycle Repetition: Process repeats with consistent performance due to superior thermal shock resistance
Quality Certifications & Standards
- ISO 9001:2015 - Quality Management System Certification
- ASTM International - Standards Compliance for Refractory Materials
- JIS R 2501 - Japanese Industrial Standards for Refractory Bricks
- GB/T 2988 - Chinese National Standards for High Alumina Bricks
- EN 993 - European Standards for Dense Shaped Refractory Products
- API 936 - American Petroleum Institute Refractory Standards
"Quality management systems provide a framework for organizations to consistently meet customer requirements and enhance customer satisfaction through effective application of the system."
Frequently Asked Questions
DH-155 checker bricks feature 69% Al₂O₃ content with ultra-low creep rate (≤0.2% at 1550°C), significantly outperforming standard refractory materials. The high alumina composition provides superior thermal shock resistance, dimensional stability, and extended service life in extreme temperature environments.
Our technical team conducts comprehensive thermal analysis based on your specific operating conditions, including temperature profiles, thermal cycling frequency, and furnace geometry. We provide customized recommendations for brick arrangement, dimensions, and installation procedures to optimize thermal efficiency and service life.
Under typical hot blast furnace operating conditions, DH-155 checker bricks demonstrate service life of 3-5 years, depending on thermal cycling frequency, maximum operating temperature, and maintenance procedures. The low creep characteristics ensure minimal dimensional change throughout the service period.
Yes, we offer comprehensive custom manufacturing services including specialized shapes, dimensions, and configurations to meet specific furnace requirements. Our engineering team works closely with clients to develop optimized solutions for unique applications while maintaining all performance specifications.
Our quality control system includes raw material analysis, in-process monitoring, and finished product testing according to ASTM and international standards. Each batch undergoes comprehensive testing for chemical composition, physical properties, and thermal performance before shipment, ensuring consistent quality and reliability.
Professional Technical Support
Contact our technical specialists for customized refractory solutions and engineering consultation
Technical Consultation
Our experienced engineers provide comprehensive technical support for refractory system design and optimization
Quality Assurance
ISO 9001:2015 certified manufacturing processes ensure consistent product quality and performance
Global Distribution
Worldwide shipping capabilities with professional packaging and logistics support
Hubei Zhongnai New Material Technology Co., Ltd.
Professional Industrial Refractory Solutions | Advanced Manufacturing Since 2010
