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It is important to select suitable parameters of a submerged entry nozzle (SEN) for optimizing the flow and temperature patterns in a mold. The effect of SEN design on the mould level stability, meniscus steel flow velocity, and heat transfer of the mold of a medium thin slab caster was studied by means of 1:1 water modeling and industrial testing. The advantages of a 2-port SEN compared with a 3-port SEN are the following: more optimal flow patterns with a lower mold level fluctuation and a lower meniscus steel flow velocity; proper powder consumption without slag bears due to a reasonable liquid powder thickness. The argon flow rate can be reduced and the mold average heat flux and temperature near the edges of the copper plate are reduced. At a casting speed of 2.5 m?min?1, the mold level fluctuation lies within ±5 mm. In addition, soft cooling of the steel shell in the mold is realized, which is suitable for casting crack susceptible steel grades.
It is important to select suitable parameters of a submerged entry nozzle (SEN) for optimizing the flow and temperature patterns in a mold. The effect of SEN design on the mold level stability, meniscus steel flow velocity, and heat transfer of the mold of a The advantages of a 2-port SEN compared with a 3-port SEN are the following: more optimal flow patterns with a lower mold level fluctuation and a lower meniscus steel flow velocity; proper powder consumption without slag bears due to a reasonable liquid powder thickness. The argon flow rate can be reduced and the mold average heat flux and temperature near the edges of the copper plate are reduced. In addition, the cooling of the steel shell in the mold is realized, which is suitable for casting crack susceptible steel grades.