Ladle shrouds and submerged entry nozzles are key functional refractories in continuous casting. They protect the steel stream against reoxidation and control mould flow. Alumina-carbon body with ZrO2 slag line resists slag, prevents clogging and sustains multi-heat sequences.
| Al₂O₃ (body) | 40 – 45% |
|---|---|
| C+SiC (body) | 22 – 25% |
| ZrO₂ (slag line) | 60 – 75% |
| Bulk density | ≥ 2.25 g/cm³ |
| CCS | ≥ 22 MPa |
| Apparent porosity | ≤ 23% |
| Thermal shock (1100℃ water) | ≥ 5 次 |
| Service temperature | ≥ 1550℃ |
Mounted below the ladle, the shroud protects the steel stream from the ladle to the tundish. It prevents reoxidation and nitrogen pickup, improves steel cleanliness in the tundish, and suppresses splashing and slag entrapment at the tundish bath surface. The alumina-carbon body with a zirconia (ZrO₂ ≥ 60%) slag line resists ladle slag and tundish flux attack with low erosion rate.
The SEN is installed at the tundish bottom and extends below the mould level. Besides preventing reoxidation, its outlet ports distribute steel evenly to control flow pattern, reduce impact depth and promote inclusion flotation for uniform shell growth. The alumina-carbon body with a ZrO₂ (60–75%) slag line, plus anti-clogging interior design, extends sequence length. Grades include fast preheating, carbon-free, silicon-free, Mn-steel, thin-slab, bent and special-section nozzles.
Choose grades by steel grade and caster type; fast preheating nozzles shorten start-up time. Preheat according to procedure to avoid thermal spalling, keep alignment to prevent biased flow, and monitor slag-line wear and clogging during sequences for planned replacement.
Henan Songrui New Refractory Materials Co., Ltd. provides grades and drawings customized for steel grades and caster types.
Al₂O₃ deoxidation products adhere to the inner wall. Optimized bore materials and structure, argon blowing and calcium treatment reduce clogging and extend sequence length.
Yes. Length, bore diameter, outlet form and slag-line materials are customized for mill conditions, with grade and drawing proposals provided.
Submit an inquiry or custom requirement for this product; reply within 24 hours
Si3N4 bonded SiC brick is made of high-purity silicon carbide with in-situ formed silicon nitride bond, featuring excellent thermal shock resistance, high strength, high thermal conductivity and oxidation resistance for blast furnace tuyeres, aluminum cell sidewalls and kiln furniture.
Cordierite-mullite kiln furniture (saggers, shelves, posts and beams) combines low thermal expansion with high refractoriness under load, offering excellent thermal shock resistance and long service life for ceramic, electronic ceramic and magnetic material kilns.
Slide gate plate is the core functional refractory of ladle and tundish slide gate systems, offering high strength, high density, excellent erosion and thermal shock resistance for precise molten steel flow control.
Ladle purge plug (corundum-spinel type) blowing argon at ladle bottom features high and stable permeability, high strength, excellent erosion and thermal shock resistance, homogenizing steel composition and removing inclusions in ladle refining.
客服微信 · 17513376789