The Quick Change Submerged Entry Nozzle (Quick Change SEN) is a critical refractory component used in continuous casting to allow rapid nozzle replacement without interrupting the casting process. Designed for high-efficiency steelmaking operations, it ensures stable molten steel flow from the tundish to the mold while minimizing downtime, improving safety, and increasing casting productivity.
Manufactured by Xintai Refractory, the quick change submerged entry nozzle is made from high-quality Al₂O₃-C and zirconia-carbon materials, offering excellent resistance to slag corrosion, thermal shock, and steel erosion. Its optimized structural design enables fast installation and replacement, making it especially suitable for high-speed continuous casting and multi-heat operations.
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
Billet continuous casting
Bloom continuous casting
Slab and thin slab continuous casting
High-speed and multi-heat casting operations
Carbon steel, low-alloy steel, and clean steel production
Production Details of Submerged Entry Nozzle
Xintai Refractory uses Cold Isostatic Pressing (CIP) technology to manufacture quick change submerged entry nozzles, ensuring uniform density and stable quality throughout the product.
Production Process:
Selection of high-purity alumina, graphite, zirconia, and antioxidants
Precise batching and uniform mixing
Cold isostatic pressing (wet bag method)
High-temperature firing and controlled heat treatment
Precision machining and dimensional inspection
Final quality inspection before shipment
This process guarantees excellent consistency, crack resistance, and performance stability.
Packing and Shipping Details
Packaging: Moisture-proof, impact-resistant crates or pallets.
Shipping: Air, sea, or land transport based on customer requirements.
Lead Time: Typically 3–4 weeks, depending on order size.
International Shipping: Fully compliant with global regulations; custom packaging available for sensitive shipments.
Frequently Asked Questions (FAQ)
Q1: What is the advantage of a quick change submerged entry nozzle?
It allows fast replacement during casting, minimizing downtime and improving production efficiency.
Q2: Can the nozzle be customized?
Yes. Xintai Refractory supports full customization based on steel grade, mold size, and casting conditions.
Q3. Is the product suitable for high-speed casting?
Yes. The nozzle is designed for stable flow control and strong erosion resistance under high-speed casting.
Q4: How durable are these nozzles?
Xintai SENs offer excellent thermal shock resistance, corrosion and slag resistance, ensuring long service life.
Q5: Can the nozzles be customized?
Yes, we offer custom sizes, shapes, and material compositions. We also produce other different types of steelmaking refractory products.
