The Externally Mounted Nozzle (Ladle Shroud / External Mounted Nozzle) is a critical flow-control refractory component designed for steel ladle and ironmaking systems. It is widely used as an external installation water nozzle solution, providing stable and controlled molten metal flow between metallurgical units.
This product is specifically engineered for steel ladles, tundishes, and ironmaking transfer systems, ensuring safe, stable, and efficient molten steel delivery with reduced heat loss and minimized risk of slag contamination.
Technical Specifications
| Item | JSK55 | JSK50 | JSK45 | JSK40 |
|---|---|---|---|---|
| Al₂O₃ % | ≥55 | ≥50 | ≥45 | ≥40 |
| C % | ≥16 | ≥18 | ≥20 | ≥22 |
| Flexural Strength (MPa) | ≥5.5 | ≥5.5 | ≥5.5 | ≥5 |
| Apparent Porosity % | ≤19 | ≤19 | ≤19 | ≤19 |
| Bulk Density (g/cm³) | ≥2.36 | ≥2.32 | ≥2.28 | ≥2.18 |
Key Features
Quick Change Design: Enables rapid nozzle replacement during continuous casting, reducing downtime and improving operational efficiency.
Excellent Slag & Steel Corrosion Resistance: Zirconia-carbon slag line effectively resists mold slag erosion and chemical attack.
Superior Thermal Shock Resistance: Suitable for severe thermal fluctuations during start-up and steady casting.
Stable Steel Flow Control: Ensures uniform molten steel distribution and reduces turbulence in the mold.
High Mechanical Strength & Long Service Life: Maintains structural integrity under high-temperature and high-speed casting conditions.
Typical Applications
- Steel ladle molten steel transfer systems
- Ladle to tundish flow control
- Ironmaking and refining systems
- Continuous casting production lines
- High-temperature metallurgical transport systems
- Carbon steel, low-alloy steel, and clean steel production
Production Details of Externally Mounted Nozzle
The externally mounted nozzle from Xintai Refractory is manufactured using advanced refractory forming and precision control techniques to ensure consistent quality and long service life.
Production Steps:
- Selection of high-purity alumina, graphite, and zirconia raw materials
- Precise batching and homogeneous mixing
- Cold isostatic pressing (CIP forming process)
- High-temperature sintering and controlled firing
- Precision machining of external mounting structure
- Dimensional inspection and assembly testing
- Final quality control before packaging
This process ensures high density, strong thermal stability, and excellent resistance to erosion and cracking.
Packing and Shipping Details
- Packaging: Reinforced wooden crates with moisture-proof protection
- Protection: Anti-crack, anti-impact, and moisture-resistant wrapping
- Delivery Time: 3–4 weeks depending on order volume
- Shipping: Sea, air, or land transportation available globally
Frequently Asked Questions (FAQ)
Q1: What is an Externally Mounted Nozzle used for in steelmaking systems?
The externally mounted nozzle is used to control and guide molten steel flow in ladle and ironmaking systems. It ensures stable transfer of molten metal between ladle and tundish while reducing turbulence and preventing slag entrainment.
Q2: What are the advantages of an externally mounted design compared to traditional nozzles?
The external mounting structure allows:
Faster replacement without dismantling internal ladle components
Reduced production downtime
Easier maintenance and inspection
Improved operational safety in high-temperature environments
Q3. What materials are used for this nozzle?
It is typically made from high-performance refractory materials such as:
Al₂O₃–C (Alumina-Carbon)
Al₂O₃–C–ZrO₂ (for enhanced slag resistance in severe conditions)
These materials provide excellent thermal shock resistance and erosion resistance.
Q4: Can the nozzle withstand high-temperature molten steel?
Yes. The externally mounted nozzle is designed for extreme steelmaking conditions, with refractoriness up to 1580–1770°C. It maintains structural stability under continuous exposure to molten steel flow.
Q5: Is the nozzle suitable for continuous casting operations?
Yes. It is widely used in continuous casting systems including:
Billet casting
Bloom casting
Slab and thin slab casting
It supports stable and continuous molten steel delivery with minimal interruption.
Q6: Can the externally mounted nozzle be customized?
Yes. Customization options include:
Material composition (Al₂O₃ content, carbon ratio, ZrO₂ addition)
Size and structural design
Connection type (threaded, flanged, quick-connect)
Flow rate and spray characteristics based on process requirements
