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Tundish
Submerged entry nozzle
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The basic requirements for the material of the submerged nozzle are good resistance to molten steel dissolution, strong resistance to slag erosion, and good thermal shock resistance. The commonly used materials are fused quartz and Al2O3-C.
The main function of the submerged nozzle is to prevent secondary oxidation of the intermediate tank injection flow and molten steel splashing; to prevent the mold protection slag from being involved in the molten steel; to improve the flow state and heat flow distribution of the injection flow in the crystallizer. This promotes the uniform growth of the shell in the crystallizer, which is conducive to the removal of gas and inclusions in the steel.
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