High-performance Tundish Well Blocks designed for continuous casting applications in modern steel plants. Installed at the bottom of the tundish, the well block serves as the seating block for the tundish upper nozzle while ensuring accurate nozzle positioning, stable molten steel flow, and excellent sealing performance.
Manufactured from premium refractory raw materials including high-alumina, alumina-magnesia, magnesia-carbon, and zirconia-based formulations, our tundish well blocks offer outstanding resistance to thermal shock, molten steel erosion, slag corrosion, and mechanical wear. Their optimized structural design significantly reduces the risk of steel leakage, nozzle misalignment, and refractory damage during long casting sequences.
For advanced clean steel production, Xintai Refractory also supplies argon-permeable tundish well blocks incorporating high-performance ceramic gas-permeable elements. By forming a uniform argon curtain around the stopper rod, these products effectively remove non-metallic inclusions, reduce nozzle clogging, improve molten steel cleanliness, and extend casting sequence time.
Our tundish well blocks have been successfully applied in steel plants producing carbon steel, alloy steel, stainless steel, and special steel, providing stable performance under demanding continuous casting conditions.
Technical Specifications
| Item | Specification |
|---|---|
| Brand | Xintai Refractory |
| Product Name | Tundish Well Block |
| Material | High Alumina / Alumina-Magnesia / Magnesia-Carbon / Zirconia |
| Al₂O₃ Content | 60–95% (Customizable) |
| MgO Content | Up to 85% |
| Bulk Density | 2.7–3.0 g/cm³ |
| Apparent Porosity | ≤18% |
| Cold Crushing Strength | ≥45 MPa |
| Flexural Strength | ≥10 MPa |
| Thermal Shock Resistance | ≥30 Cycles |
| Refractoriness | ≥1790°C |
| Service Life | 15–30 Casting Heats |
| Shape | Standard or Customized |
| Manufacturing Process | Precast / Pressed / Monolithic |
| Application | Tundish Bottom Nozzle Seating |
| Packing | Export Wooden Case |
| Storage | Store Dry, Keep Upright, Avoid Impact |
Key Features
- Precise Nozzle Positioning: The tundish well block securely supports the upper nozzle and stopper rod, maintaining accurate alignment throughout the casting process to ensure stable molten steel flow.
- Excellent Sealing Performance: Precision manufacturing and high-density refractory materials provide a tight seal around the nozzle assembly, effectively preventing molten steel leakage.
- Superior Thermal Shock Resistance: Optimized material formulations withstand repeated heating and cooling cycles without cracking or spalling, ensuring reliable long-term operation.
- Outstanding Erosion and Corrosion Resistance: The refractory matrix resists attack from molten steel and aggressive slags, maintaining dimensional stability throughout extended casting campaigns.
- Long Service Life: High mechanical strength and excellent wear resistance allow the well block to support long sequence casting while reducing replacement frequency and maintenance costs.
- Improved Steel Cleanliness: Argon-permeable well blocks generate a fine bubble curtain around the stopper rod, promoting flotation of non-metallic inclusions and improving steel cleanliness.
- Reduced Nozzle Clogging: The argon curtain minimizes alumina deposition around the nozzle entrance, significantly reducing clogging during continuous casting.
- Compatible with Various Casting Systems: Suitable for billet, bloom, slab, and beam blank casting systems using stopper rods, metering nozzles, slide gates, or nozzle changers.
Typical Applications
Our tundish well blocks are widely used in:
- Continuous casting of carbon steel
- Alloy steel production
- Stainless steel casting
- Bearing steel production
- High-speed steel casting
- Ultra-low carbon steel
- Clean steel production
- Billet continuous casting
- Bloom casting
- Slab casting
Production Details of Tundish Well Block
Premium Raw Materials
Only carefully selected refractory raw materials with high purity and stable chemical composition are used to ensure consistent quality.
Precision Forming
Advanced hydraulic pressing and precast technologies provide accurate dimensions, uniform density, and excellent structural integrity.
Controlled Drying and Heat Treatment
Scientific drying and firing processes eliminate internal stress while maximizing strength and thermal stability.
Strict Quality Inspection
Every batch undergoes comprehensive testing including:
- Chemical composition analysis
- Bulk density measurement
- Apparent porosity testing
- Cold crushing strength testing
- Thermal shock resistance evaluation
- Dimensional inspection
Customized Design Service
We customize dimensions, nozzle pocket geometry, material formulation, gas-permeable structures, and refractory composition according to:
- Steel grade
- Tundish design
- Nozzle type
- Casting sequence length
- Slag chemistry
- Operating temperature
- Customer drawings
Packing and Shipping Details
Packing: Standard export wooden cases with internal cushioning to prevent impact damage.
Moisture Protection: Products are packed with moisture-proof materials to ensure dryness.
Handling Instructions: Keep upright during storage and transportation. Handle with care to avoid mechanical shock.
Shipping Methods: Sea freight, railway, or truck transportation depending on customer location.
Frequently Asked Questions (FAQ)
Q1: What is a tundish well block?
A tundish well block is a precast refractory component installed at the bottom of a tundish. It supports the tundish upper nozzle, provides sealing, maintains proper nozzle alignment, and protects the tundish bottom during continuous casting.
Q2: What materials are available?
Common materials include high alumina, alumina-magnesia, magnesia-carbon, and zirconia-based refractories. Material selection depends on steel grade, slag chemistry, casting sequence, and operating conditions.
Q3. What are the advantages of argon-permeable tundish well blocks?
Argon-permeable well blocks create a fine gas curtain that removes non-metallic inclusions, improves molten steel cleanliness, reduces nozzle clogging, and extends continuous casting time.
Q4: Can you manufacture customized tundish well blocks?
Yes. Xintai Refractory can customize dimensions, shapes, material composition, gas channel structures, and nozzle pocket designs according to customer drawings or operating requirements.
Q5: How long does a tundish well block last?
Under normal continuous casting conditions, our tundish well blocks typically achieve a service life of 15–30 casting heats, depending on steel grade, slag composition, casting sequence, and operating practices.
