The Submerged Entry Nozzle (SEN) from Xintai Refractory is a high-performance refractory component designed for the continuous casting process. It controls the flow of molten steel from the tundish into the mold, ensuring uniform distribution, protecting the steel from oxidation, and stabilizing the flow to produce high-quality, defect-free steel.
Manufactured from premium Al₂O₃-C refractory materials or zirconium-graphite composites, Xintai SENs offer excellent thermal shock resistance, corrosion resistance, and long-term durability. Their precise design and controlled porosity ensure optimal gas flow and minimal turbulence in the mold, making them ideal for modern steelmaking 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
Uniform Flow Control: Maintains consistent molten steel flow and mold filling.
High Thermal Shock Resistance: Withstands rapid temperature changes during casting.
Corrosion & Slag Resistance: Protects against molten steel and mold slag.
High Mechanical Strength: Resists cracking and mechanical stress.
Long Service Life: Designed for extended operation in continuous casting environments.
Customizable Design: Available in multiple shapes, sizes, and material grades.
Typical Applications
Continuous casting of carbon steel, low manganese steel, aluminum-killed steel, and high-quality alloy steel.
Billet, bloom, slab, and thin slab casting.
Steelmaking operations requiring high cleanliness and low inclusion content.
Gas purging, flow control, and protection of molten steel in tundish applications.
Production Details of Submerged Entry Nozzle
Xintai Refractory uses advanced isostatic pressing (CIP) technology to manufacture SENs, ensuring uniform density, minimal defects, and reliable performance.
Production Process:
Raw Material Mixing: High-purity alumina, graphite, zirconium, and antioxidants are blended.
Molding: Powder is filled into rubber molds and sealed in support boxes.
Isostatic Pressing: High pressure compresses the powder from all directions to form a dense green body.
Sintering: High-temperature firing strengthens the nozzle.
Mechanical Processing: Nozzles are machined to precise dimensions.
Quality Inspection: Each nozzle is tested for thermal shock resistance, porosity, density, and mechanical strength.
For enhanced slag resistance, the nozzle’s lower section can be lined with zirconium-graphite material.
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 steel types can Xintai SENs be used for?
They are suitable for carbon steel, low manganese steel, aluminum-killed steel, and many alloy steels.
Q2: How do I select the right nozzle type?
Selection depends on steel grade, mold design, and casting speed. Our technical team can recommend the optimal SEN.
Q3. What types of SENs are available?
Straight-through, side-hole, hemispherical mouth, thin-walled, flat-end quick-change, and zirconium-core embedded types.
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.
