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The metering nozzle for the tundish is made of calcium oxide and ZrO2 as the main raw materials through the combined grade of raw materials, and processed by high high-temperature burning technique for the nozzle. It has good thermal shock resistance, anti-corrosion, long service life, etc.   The metering nozzle for the tundish is applicable for the continuous casting of small blocks, especially a highly efficient continuous casting machine. The feature: 1. Low expansion, Superior resistance to erosion/corrosion and thermal shock cycling. 2. Extended casting sequence times. 3. Controlled and stable casting speed. 4. Resistance to oxygen lancing. 5 Changeless diameter and lasting long.