Low Creep High Alumina Brick
Application Industry: Refractories for Steel Industry
Application Equipment: Blast Furnace Hot Blast Stove and Hot Air Furnace
Size: 230 x 114 x 65 mm (custom sizes and shapes available on request)
Products Overview
Our Low Creep High Alumina Brick series is a dense refractory product family engineered for the hot blast stove and hot air furnace of small and medium sized blast furnaces. The product is manufactured from special grade aluminum bauxite clinker as the main raw material, supplemented by special additives, and processed through high pressure forming and high temperature firing, giving a refractory brick with the characteristics of large heat storage capacity and small creep rate.
The Low Creep High Alumina Brick product family is offered in six DRL grades (DRL70, DRL75, DRL80, DRL65, DRL85, and DRL48) covering an Al2O3 content range of 48% to 85% and a refractoriness range of 1750 to 1790 °C. The DRL75 and DRL80 grades offer the best creep behaviour at 1450 to 1500 °C under 50-hour load tests, making them the recommended grades for the combustion chamber and dome zones of the hot blast stove. The DRL65, DRL85, and DRL48 are reference grades for cost-effective lining design in intermediate and cooler lining zones.
Sourced from our Xinmi City, Zhengzhou, Henan, China facility, each Low Creep High Alumina 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:
- Engineered from special grade aluminum bauxite clinker with large heat storage capacity and small creep rate
- High pressure forming and high temperature firing for stable volume under long-term high temperature service
- Six DRL grades (DRL48 to DRL85) covering Al2O3 range 48 to 85 percent for full lining zone flexibility
- Recommended for small and medium sized blast furnace supporting hot blast stove applications
- Creep-rated grades DRL70, DRL75, and DRL80 deliver creep rate under 1 percent at high temperature load
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 | |||||
|---|---|---|---|---|---|---|
| DRL70 | DRL75 | DRL80 | DRL65 | DRL85 | DRL48 | |
| Al2O3 content ≥ (%) | 70 | 75 | 80 | 65 | 85 | 48 |
| Refractoriness ≥ (°C) | 1790 | 1790 | 1790 | 1790 | 1770 | 1750 |
| Apparent Porosity ≤ (%) | 20 | 20 | 19 | 24 | 24 | 24 |
| Cold Crushing Strength ≥ (MPa) | 65 | 70 | 80 | 49 | 44.1 | 39.2 |
| Refractoriness Under Load ≥ (°C, 0.2 MPa) | 1500 | 1550 | 1650 | 1500 | 1470 | 1420 |
| Reheating Linear Change ≤ (%) | ±0.1 (1450°C×2h) | ±0.1 (1550°C×2h) | ±0.1 (1550°C×2h) | ±0.1 to ±0.4 (1550°C×2h) | ±0.1 to ±0.4 (1550°C×2h) | ±0.1 (1450°C×2h) |
| Creep Rate ≤ (%) | 1.0 (1400°C×50h) | 1.0 (1450°C×50h) | 1.0 (1500°C×50h) | — | — | — |
Note: Values marked with — are reference grades and are not creep-rated per the standard test protocol. Contact CH Refractories engineering for application guidance on DRL65, DRL85, and DRL48.
Product Applications
Low Creep High Alumina Bricks are dense refractory bricks manufactured from special grade aluminum bauxite clinker, engineered for the hot blast stove and hot air furnace of small and medium sized blast furnaces. The product family covers six DRL grades (DRL48 to DRL85) covering an Al2O3 content range of 48% to 85% and a refractoriness range of 1750 to 1790 °C, allowing the metallurgist to match each lining zone to the optimal combination of refractoriness, creep behaviour, and cost.
Application Industry: Refractories for the Steel Industry and the broader Metallurgical Industry.
Target Equipment: Hot Blast Stove (Cowper stove) of small and medium sized Blast Furnaces.
Specific Lining Zones: DRL70, DRL75, and DRL80 are the creep-rated workhorse grades for the combustion chamber, dome, and upper checkerwork of the hot blast stove. DRL65 is the intermediate grade for the sidewalls and upper checkerwork. DRL85 is the highest-Al2O3 option for the hottest dome zones. DRL48 is the cost-effective grade for the lower checkerwork and cooler lining zones of the hot blast stove lining.
CH Refractories is a Low Creep High Alumina Brick manufacturer in China, Henan, Zhengzhou. The complete Low Creep High Alumina Brick product family is manufactured in our Xinmi City, Zhengzhou, Henan, China facility to ASTM, GB/T, and ISO refractory standards. Each low creep high alumina 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.
