2019 Pittsburgh AISTech

The Effect of Upper Nozzle Refractory in Bubble Behavior Inside the SEN and Slab Mold in Continuous Casting: Physical and Mathematical Model (Room 407)

06 May 19
4:00 PM - 4:30 PM

Tracks: Continuous Casting

Speaker(s): Varadarajan Seshadri, Federal University of Minas Gerais; Johne Jesus Mol Peixoto, Federal University of Ouro Preto; Itavahn Alves da Silva, Federal University of Ouro Preto; Paulo Luiz Santos Junior, RHI Magnesita/Pontifical Catholic University of Minas Gerais; Carlos Antônio Silva, Federal University of Ouro Preto; Clenice Moreira Galinari, RHI Magnesita

This study intends to investigate the behavior of gas bubbles (air) inside a liquid flow system, simulating the submerged-entry nozzle (SEN) refractory system, using a physical model. Air was injected through porous refractory plates, produced by RHI Magnesita, inside a water channel simulating the SEN. Recording was done with a high-speed camera (1000 frames/second) in order to assess gas distribution. Based on this, a mathematical model has been developed with the objective of evaluating the effect of flow rate (gas-liquid) on gas distribution for different combinations of drag and non-drag forces. The effect of gas distribution on the flow field of liquid inside the mold and other metallurgical aspects were discussed.