Tundish Upper Nozzle
Main features
Consisternt casting speed
Extend casting time
Able to adapt to large thermal stress
Products Description
The tundish upper nozzle is a critical refractory component embedded in the base of the continuous casting ladle, connecting the ladle to the flow control assembly. Its primary function is to guide molten steel smoothly from the tundish into the downstream channel.
Key Functions
Stable Flow Guidance: Directs molten steel from the ladle evenly and steadily towards the outlet through its internally smooth passage.
Sealing and Leak Prevention: The contact surface with the lower spout undergoes precision machining to ensure effective sealing at elevated temperatures, preventing molten steel leakage through gaps.
Protection of Ladle Body: The upper nozzle directly withstands the scouring and erosion of molten steel, thereby reducing direct damage to the ladle's bottom refractory lining and extending the tundish's service life.
Anyang Changtai Silicon Industry Co., Ltd. is a company specializing in the design, processing, and sales of high-temperature zirconia products. If you would like to purchase high-temperature zirconia products, please contact us. We will respond as soon as possible after receiving your message.
Product Data
|
CT-PMD1 |
CT-PMD2 |
CT-PMD3 |
|
|
Apparent Porosity (%) |
11-12 |
8-10 |
6-8 |
|
Bulk Density (g/cm3) |
≥4.9 |
≥5.2 |
≥5.3 |
|
ZrO + HfO |
≥94.0 |
≥95.5 |
≥96.0 |
|
SiO |
1.1 |
0.23 |
0.5 |
|
TiO2 |
0.2 |
0.2 |
0.1 |
|
Fe2O3 |
0.5 |
0.05 |
0.05 |
|
Al2O3 |
0.4 |
0.42 |
0.1 |
|
CaO |
0.2 |
0.15 |
0.15 |
|
MgO |
2.5 |
2.4 |
2.4 |
|
Na2O |
0.03 |
0.01 |
0.01 |
Our Products
Material Composition of Ladle Tundish Nozzle
1. Aluminum-Carbon Type
Core Components
High-purity alumina (Al₂O₃) serves as aggregate, graphite as carbon source, combined with organic binders such as phenolic resin.
Key Properties
- Excellent thermal shock resistance; graphite mitigates stress from sudden temperature changes, reducing cracking risk.
- Strong resistance to molten steel erosion, with high strength at both ambient and elevated temperatures, capable of withstanding prolonged impact from flowing molten steel.
2. Corundum-Based
Core Components
Primarily composed of fused corundum or sintered corundum (Al₂O₃ content ≥90%), with minor additions of modifiers like magnesium oxide and chromium oxide.
Key Properties
- High refractoriness with superior high-temperature stability compared to alumina-carbon materials, enabling long-term operation above 1700°C.
- Strong resistance to chemical erosion from molten slag.
3. Zirconia-containing Composite Material
Core Components
Formed by adding stabilized zirconia to alumina-carbon or corundum bases, creating a composite system.
Key Properties
- Combines corrosion resistance with erosion resistance. The inclusion of zirconia significantly enhances resistance to molten steel and slag erosion while maintaining thermal shock stability.
- Extended service life. Compared to pure alumina-carbon nozzles, continuous casting furnace cycles can be increased by 30%-50%.
Why Choose Us?
Anyang Changtai Silicon Industry Co., Ltd. maintains a comprehensive product traceability system to ensure product performance meets the highest quality standards stipulated by ISO9001, ISO14001, and SGS guidelines, managed through our rigorous quality control system.
Our zirconia products feature high purity, exceptional high-temperature corrosion resistance, extended service life, and outstanding quality stability. Furthermore, we tailor designs to meet specific customer requirements for diverse operational environments and conditions. Our products are exported to markets worldwide. Click the button below to request a quote!
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