Casting Nozzle with Alumina Carbon Case Zirconia Insert for Steel Making
Anyang Changtai Silicon Industry Co., Ltd. supplies casting nozzle with alumina carbon case and zirconia insert for steelmaking tundish continuous casting. Multiple ZrO₂ grades optional, anti-erosion, thermal shock resistant, custom drawing machining. Bulk order available, get your quotation.
Products Description
The composite casting nozzle adopts an alumina-carbon outer case matched with inner zirconia insert, a key refractory component for tundish continuous casting in steelmaking. The outer alumina-carbon body delivers outstanding thermal shock resistance and structural strength, while the embedded zirconia insert forms the molten steel flow bore to resist high-speed steel scouring and slag corrosion. This composite structure balances performance and cost, effectively slows bore enlargement, stabilizes casting speed and extends continuous casting sequence. Anyang Changtai Silicon Industry Co., Ltd. supplies full finished composite nozzles, customised according to your casting system and steel grade requirements.
Structure & Types
Outer body: Alumina-carbon (Al₂O₃-C) case, provides mechanical support and thermal shock protection
Inner liner: Stabilized zirconia insert, available in 65%,70%,75%,80%,90% ZrO₂ grades
Common types:
Tundish stationary upper nozzle
MNC exchangeable metering lower nozzle
Straight bore, tapered bore, chamfer inlet/outlet design
Custom OD, ID, overall height and connection profile can be produced per your DWG drawing or old sample.
Typical Technical Parameters
| Item | 65% ZrO₂ Composite Nozzle | 75% ZrO₂ Composite Nozzle | 90% ZrO₂ Composite Nozzle |
|---|---|---|---|
| ZrO₂+HfO₂ (Insert) | ≥65% | ≥75% | ≥90% |
| Bulk density of alumina-carbon case (g/cm³) | ≥2.4 | ≥2.5 | ≥2.5 |
| Apparent porosity of case (%) | ≤16 | ≤15 | ≤15 |
| Cold crushing strength of case (MPa) | ≥60 | ≥70 | ≥70 |
| Max working temperature | 1600℃ | 1650℃ | 1720℃ |
Parameters adjustable for different working conditions. Mill test certificate available for each batch.
Key Performance Advantages
Composite material design
Outer alumina-carbon shell resists thermal shock; inner zirconia insert focuses on anti-erosion. Better cost efficiency than full zirconia nozzle.
01
Restrain bore expansion
Dense zirconia liner reduces steel and slag wash, maintains steady casting speed for long sequence casting.
02
Strong structural stability
Alumina-carbon body tolerates sharp temperature fluctuation, less crack or spalling during preheating and casting.
03
Tight assembly
Precision ground insert and matched refractory mortar avoid gap, prevent molten steel infiltration between liner and outer case.
04
Low steel contamination
Chemically inert zirconia reduces reaction with molten steel, improves steel cleanliness and reduces inclusion defects.
05
Our products
Quality Control
- Raw material incoming inspection for chemical composition and particle size
- In-process dimension and density inspection for both alumina-carbon body and zirconia insert
- Finished product test: dimension check, surface crack inspection, hardness and physical property test
- Batch mill test report supplied. Third-party inspection SGS, BV acceptable upon request.
How to contact us
Contact Anyang Changtai Silicon Industry Co., Ltd. for quotation, technical datasheet, drawing review and sample test. Share your nozzle dimension, zirconia grade and casting working condition. Our engineering team will provide professional solution.
Phone Number
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