Refractory Tundish Nozzle Lower Nozzle

 

The refractory tundish nozzle lower nozzle is a critical component used in the continuous casting process of steel production. It is designed to regulate the flow of molten steel from the ladle into the mold, ensuring a controlled and smooth casting operation. Made from high-quality refractory materials, the lower nozzle is built to withstand high temperatures and resist wear and erosion caused by the molten steel.

 

 

The refractory tundish nozzle, also known as the lower nozzle, is an important component used in the continuous casting process of steel production. It is located at the bottom of the tundish, which is an intermediate vessel between the ladle and the mold in the casting process.

 

The main purpose of the refractory tundish nozzle is to control the flow of liquid steel from the ladle into the mold. It acts as a valve, regulating the steel flow rate and ensuring a smooth and controlled casting operation. The lower nozzle is exposed to high temperatures and molten steel, so it is made from high-quality refractory materials that can withstand these harsh conditions.

 

The refractory tundish nozzle is subject to wear and erosion due to the flow of molten steel. Therefore, it is a consumable component that needs periodic replacement. The frequency of replacement depends on various factors such as the steel grade being cast, casting speed, and tundish maintenance practices.

 

 

Specification	Upper Nozzle	Lower Nozzle
ZrO2+HfO2(%)	≥95	≥95
Al2O3(%)	≥85	≥85
MgO(%)	Â	Â
C(%)	≥3	≥3
Bulk Density (g/cm³)	≥5.2	≥2.6
Apparent Porosity (%)	≤10	≤20
Crushing Strength (MPa)	≥100	≥45
Thermal Shock Resistance	≥5	≥5

 

 

Improved Flow Control: The tundish lower nozzle allows for precise flow control of molten steel during the continuous casting process. This enables better control over the casting speed and ensures a consistent and uniform flow, leading to improved product quality.

Enhanced Steel Quality: By regulating the flow of molten steel, the tundish lower nozzle helps in reducing turbulence and controlling the inclusion content in the steel. This results in higher-quality steel products with improved cleanliness and reduced defects.

Temperature and Chemical Resistance: Tundish lower nozzles are engineered to withstand high temperatures and resist chemical reactions with molten steel and slag constituents. This ensures their stability and performance even under challenging operating conditions.

Consistent Performance: Tundish lower nozzles, manufactured in compliance with industry standards and quality control protocols, offer consistent and reliable performance. Their high-quality construction and precise flow control contribute to consistent casting results and improved overall process stability.

Increased Productivity: With better flow control and improved steel quality, the use of a tundish lower nozzle can lead to increased productivity in the continuous casting process. It allows for higher casting speeds, reduced downtime for maintenance, and improved yield.

 

 

The refractory tundish nozzle lower nozzle is used in the steel industry for continuous casting processes. It finds applications in:

Steel Mills: Used in the tundish of continuous casting machines to control the flow of molten steel during the casting process, ensuring high-quality steel products.

Foundries: Employed in foundry operations that require continuous casting of steel to produce various steel products like billets, slabs, and blooms.

Metal Fabrication: Used in metal fabrication processes where continuous casting of steel is necessary for the production of specialized components and structures.

Steel Recycling: Utilized in facilities that recycle scrap steel and produce new steel products through continuous casting methods.

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