Effect of the reaction process between the SEN and molten steel containing aluminum by applying an electric field

In view of the clogging problem associated with submerged entry nozzles (SEN) used for aluminum-killed steel, the reaction behavior between the SEN and molten steel with high Al content with the influence of an external electric field is studied in this paper. The results showed that the application of an effective and positive voltage to the walls of the SEN would promote the decarburization of the SEN itself and the interfacial reaction between nozzle material and molten steel containing aluminum. On the contrary, these behaviors would be inhibited under the control of the negative voltage. Therefore, with the polarity of electric field applied on the SEN, it is necessary to determine whether the critical factor leading to clogging is the content of the Al2O3 inclusions or Al alloy content in the steel.

Automated summary

In this paper, the reaction behavior between a submerged entry nozzle (SEN) and molten steel with high Al content under the influence of an external electric field was studied. The results showed that a positive voltage promoted decarburization and interfacial reaction, while a negative voltage inhibited these behaviors. The polarity of the electric field applied on the SEN is crucial in determining the critical factor leading to clogging, whether it is the content of Al2O3 inclusions or the Al alloy content in the steel.