A tundish metering nozzle zirconia insert is a component used in the continuous casting process of molten metal in the steel industry. The tundish is a vessel that holds the molten steel and the metering nozzle controls the flow of the molten steel from the tundish into the casting mold.

The zirconia insert is a component within the metering nozzle that is made of a type of ceramic material called zirconia, which has excellent thermal shock resistance, high melting point, and good mechanical strength. It helps to ensure that the molten steel flows smoothly through the metering nozzle and into the casting mold, and it also helps to reduce turbulence and the formation of air bubbles in the steel.

The use of zirconia inserts in tundish metering nozzles has become increasingly popular in recent years due to their superior performance compared to other materials. Zirconia inserts are known for their high resistance to wear, erosion, and corrosion, which makes them a cost-effective choice for use in the steel industry.