Blast Furnace Tuyere Combined Bricks
Application Industry: Refractories for Steel Industry
Application Equipment: Blast Furnace Tuyere Assembly and Hot Air Furnace
Size: Custom sizes per blast furnace tuyere design (free mold design on request)
Products Overview
Our Blast Furnace Tuyere Combined Bricks are complex refractory assemblies engineered for the tuyere zone of large and medium-sized blast furnaces, where the working conditions are among the most severe in the ironmaking process. The product is built by interlock-assembling dozens to hundreds of simple geometric brick pieces so that stress is transmitted evenly through the entire lining structure, giving a more stable assembly than a single-piece brick could.
The Blast Furnace Tuyere Combined Brick product family is offered in three material grades (GM-70 corundum-mullite, ML-60 mullite, and NT-45 clay) covering an alumina content range of 45% to 70% and a refractoriness range of 1690 to 1790 deg C. This range allows the lining designer to balance refractoriness, density, and load-bearing capacity for different lining zones of the tuyere assembly. GM-70 is the high-alumina workhorse grade for the tuyere nose and hotter zones, ML-60 is the intermediate grade for the combustion chamber inlet, and NT-45 is the cost-effective grade for the lower entrance, flue tube, and mixing duct.
Sourced from our Xinmi City, Zhengzhou, Henan, China facility, each Blast Furnace Tuyere Combined 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:
- Complex geometric assembly of dozens to hundreds of interlocked simple bricks for stable lining structure
- Semi-dry molding plus overall casting centrifugation plus cutting for tight dimensional tolerance
- Three material grades (GM-70 corundum-mullite, ML-60 mullite, NT-45 clay) for different lining zones
- Interlocking design transmits stress evenly through the entire lining structure during high blast temperature service
- Engineering proven for the tuyere nose, taphole, hot air outlet, and bustle pipe of large blast furnaces
Product Specification
Standard sizes are custom-engineered per buyer’s blast furnace tuyere design drawing. Free mold design is available on request; please contact our engineering team with the tuyere drawing and operating conditions.
| Items | Brands | ||
|---|---|---|---|
| GM-70 Corundum-mullite |
ML-60 Mullite |
NT-45 Clay |
|
| Al2O3 content ≥ (%) | 70 | 60 | 45 |
| Fe2O3 content ≤ (%) | 1.5 | 1.5 | 2.0 |
| Apparent Porosity ≤ (%) | 17 | 18 | 20 |
| Bulk Density (110 deg C × 24h) ≥ (g/cm³) | 2.75 | 2.7 | 2.2 |
| Crushing Strength (110 deg C × 24h) ≥ (MPa) | 60 | 50 | 40 |
| Refractoriness ≥ (deg C) | 1790 | 1790 | 1690 |
| Refractoriness Under Load ≥ (deg C, 0.2 MPa) | 1600 | 1550 | 1400 |
| Creep Rate ≤ (%) | 1.0 (1450 deg C × 50h) | 1.0 (1400 deg C × 50h) | 1.0 (1150 deg C × 50h) |
| Thermal Shock Resistance ≥ (cycles, 1100 deg C) | 25 | 25 | 20 |
| Application | Blast furnace tuyere, taphole, hot air outlet, three forks, bustle pipe tuyere, upper inlet, etc. | Combustion chamber inlet, upper inlet, mixed air inlet and outlet. | Lower entrance hole. Flue tube. Mixing duct, turning tube, reducing pipe, etc. |
Note: Standard sizes are engineered per buyer’s blast furnace tuyere design drawing. For project-specific chemistry and dimensional data, contact CH Refractories engineering.
Product Applications
Blast Furnace Tuyere Combined Bricks are critical refractory assemblies used in the tuyere zone of large and medium sized blast furnaces and in the hot air furnace, where the working conditions are the most severe in the ironmaking flow path. The product is designed to meet the high blast temperature and harsh gas-flow conditions that traditional single-piece bricks cannot withstand.
Application Industry: Refractories for the Steel Industry and the broader Metallurgical Industry.
Target Equipment: Blast Furnace tuyere assembly, hot air furnace, and tuyere-related zones of large and medium-sized Blast Furnaces.
Specific Lining Zones: Blast Furnace Tuyere Combined Bricks in grade GM-70 are used for the harshest zones including the tuyere nose, taphole, hot air outlet, three forks, bustle pipe tuyere, and upper inlet. ML-60 is used for the combustion chamber inlet, upper inlet, and mixed air inlet and outlet. NT-45 is used for the lower entrance hole, flue tube, mixing duct, turning tube, and reducing pipe in cooler lining zones.
CH Refractories is a Blast Furnace Tuyere Combined Bricks manufacturer in China, Henan, Zhengzhou. The complete Blast Furnace Tuyere Combined Brick product family is manufactured in our Xinmi City, Zhengzhou, Henan, China facility to ASTM, GB/T, and ISO refractory standards. Each tuyere combined brick is custom engineered to the buyer’s blast furnace tuyere design drawing and supported by free mold 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.
