Zirconia Inserts For Lower Nozzle

Steel flow path from ladle to mold

• The insert protects the lower nozzle body, slowing the erosion rate of the inner bore by molten steel and slag systems. This results in slower bore diameter changes and smoother steel flow, making it suitable for extended continuous casting operations.

Long continuous casting or high-speed pouring conditions

• Wear on the lower nozzle is concentrated, and standard materials are prone to bore enlargement. Zirconia inserts enhance bore stability, reducing flow fluctuations and operational adjustments caused by bore enlargement.

Continuous casting of stainless steel and high-alloy steels

• Highly reactive and corrosive slag systems accelerate erosion of the lower nozzle bore. Zirconia inserts demonstrate superior stability against molten steel and slag, extending nozzle service life and minimizing mid-pour replacements.

Nozzle Maintenance and Retrofits

• Zirconia inserts are commonly used for refurbishing worn nozzle bores or optimizing structures. Replacing inserts instead of entire nozzles reduces spare part costs and facilitates on-site maintenance.

Spare Parts for Critical Continuous Casting Lines

• Enables rapid replacement during wear or malfunctions, minimizing downtime and ensuring production continuity.

• Select insert dimensions based on nozzle structure, bore diameter, and mating tolerances. Standardized insert specifications may be designed for interchangeability among nozzles of the same model.
• For applications involving high-activity steel grades and slag systems, prioritize zirconia formulations with high density and low porosity. Special surface treatments or composite structures may be employed when necessary.
• For high pouring intensity or severe erosion conditions, increase insert thickness appropriately or use tapered/stepped fits to enhance resistance to dislodgement.
• Confirm installation method (press fit, keyed, or mechanical clamping) with the equipment manufacturer and design suitable clearance and fixing structures.

 

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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