Low Creep Andalusite Brick
Application Industry: Refractories for Steel Industry
Application Equipment: Large and Medium-Sized Blast Furnace Hot Air Furnace
Size: 230 x 114 x 65 mm (custom sizes and shapes available on request)
Products Overview
Our Low Creep Andalusite Brick series is a dense refractory product family manufactured from premium mullite and andalusite raw materials, subjected to high pressure molding and high temperature firing. The result is a brick with low impurity content, low porosity, low bulk density, high temperature strength, stable volume under high temperature conditions, good thermal shock resistance, and small creep variability.
The Low Creep Andalusite Brick product family is offered in four CHZ grades (CHZ150, CHZ145, CHZ140, and CHZ135) covering an Al2O3 content range of 55% to 70% and a refractoriness range of 1790 to 1810 °C. This range allows the lining designer to balance refractoriness, density, and thermal-shock resistance for the combustion chamber and dome zones of the hot air furnace of large and medium sized blast furnaces. CHZ150 and CHZ145 are the high-refractoriness workhorse grades for the upper combustion-chamber zones, while CHZ140 and CHZ135 are the cost-effective grades for the intermediate and cooler lining zones.
Sourced from our Xinmi City, Zhengzhou, Henan, China facility, each Low Creep Andalusite Brick is engineered to ASTM, GB/T, and ISO refractory standards. For an overview of the broader catalogue, see the Refractories for the Steel Industry category, or contact our technical sales team for a free consultation against your refractory drawing.
Product Features
Features:
- Manufactured from premium mullite and andalusite raw materials with low impurity content and low porosity
- High pressure molding plus high temperature firing for low bulk density and stable volume under high temperature
- High temperature strength and good thermal shock resistance under hot air furnace service
- Stable volume under high temperature conditions with small creep rate variability
- Four CHZ grades covering Al2O3 range 55 to 70 percent for the most demanding hot air furnace zones
Product Specification
Standard size: 230 x 114 x 65 mm. Custom sizes, shapes, and tolerances are available on request and quoted against the buyer’s refractory drawing.
| Items | Brands | |||
|---|---|---|---|---|
| CHZ150 | CHZ145 | CHZ140 | CHZ135 | |
| Al2O3 content ≥ (%) | 70 | 65 | 60 | 55 |
| Fe2O3 content ≤ (%) | 1.0 | 1.0 | 1.3 | 1.3 |
| Refractoriness ≥ (°C) | 1810 | 1810 | 1790 | 1790 |
| Apparent Porosity ≤ (%) | 18 (21) | 19 (21) | 19 (21) | 19 (21) |
| Bulk Density ≥ (g/cm³) | 2.6 | 2.5 | 2.5 | 2.45 |
| Cold Crushing Strength ≥ (MPa) | 65 (55) | 65 (55) | 70 (60) | 70 (60) |
| Refractoriness Under Load ≥ (°C, 0.2 MPa) | 1650 | 1650 | 1630 | 1600 |
| Reheating Linear Change (1500°C × 2h) (%) | 0 ~ +0.5 | 0 ~ +0.5 | 0 ~ +0.5 | 0 ~ +0.5 |
| Thermal Shock Resistance ≥ (cycles, 1100°C) | 30 | 25 | 25 | 20 |
| Creep Rate ≤ (%) | 0.8 (1500°C×50h) | 0.8 (1450°C×50h) | 0.8 (1400°C×50h) | 0.8 (1400°C×50h) |
Note: Standard sizes are engineered per buyer’s refractory drawing. For project-specific chemistry and dimensional data, contact CH Refractories engineering.
Product Applications
Low Creep Andalusite Bricks are dense refractory bricks manufactured from premium mullite and andalusite raw materials, engineered for the hot air furnace of large and medium sized blast furnaces. The product family covers four CHZ grades (CHZ150, CHZ145, CHZ140, and CHZ135) covering an Al2O3 content range of 55% to 70% and a refractoriness range of 1790 to 1810 °C, allowing the metallurgist to match each lining zone to the optimal combination of refractoriness, density, thermal shock resistance, and cost.
Application Industry: Refractories for the Steel Industry and the broader Metallurgical Industry.
Target Equipment: Hot Air Furnace (Cowper stove) of large and medium sized Blast Furnaces.
Specific Lining Zones: CHZ150 and CHZ145 are the high-refractoriness workhorse grades for the combustion chamber and upper zones of the hot air furnace. CHZ140 is the intermediate grade for the dome and sidewalls. CHZ135 is the cost-effective grade for the lower checkerwork and cooler lining zones of the hot air furnace lining.
CH Refractories is a Low Creep Andalusite Brick manufacturer in China, Henan, Zhengzhou. The complete Low Creep Andalusite Brick product family is manufactured in our Xinmi City, Zhengzhou, Henan, China facility to ASTM, GB/T, and ISO refractory standards. Each low creep andalusite brick is engineered to the buyer’s refractory drawing and supported by free consultation, free 3D design, on-site technical support, and a dedicated engineering team serving Refractories for the Steel Industry customers across the global iron and steel value chain.
