Title

INFLUENCE OF SUBMERGED VALVE GEOMETRY ON THE PROCESS OF CONTROLLING INCLUSIONS IN THE CONTINUOUS CASTING MOLD MENISCUS

INFLUENCE OF SUBMERGED VALVE GEOMETRY ON THE PROCESS OF CONTROLLING INCLUSIONS IN THE CONTINUOUS CASTING MOLD MENISCUS

Authorship

BANDEIRA, VICTOR SILVA BOLLO; VIEIRA, ESTEFANO APARECIDO

BANDEIRA, VICTOR SILVA BOLLO

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VIEIRA, ESTEFANO APARECIDO

I am this author

DOI

10.5151/2594-5300-41155

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Abstract

INCLUSIONS ARE UNDESIRABLE CONTAMINANTS FOR THE STEEL INDUSTRY AND ARE A CONSEQUENCE OF THE NUMEROUS CHEMICAL AND THERMODYNAMIC REACTIONS PRESENT IN ITS PROCESSES, WHICH MAKES IT ESSENTIAL TO HAVE REFINED PRODUCTION CONTROL. USING ANSYS® SIMULATION SOFTWARE, 6 SUBMERGED VALVE CONFIGURATIONS WERE MADE, BASED ON THEIR PROJECTION ANGLE AND DEPTH INSIDE THE MOLD. THE ANGLES EVALUATED WERE -11.4º AND -13º AT DEPTHS OF 150MM, 200MM AND 250MM. IN ADDITION, CONTOUR PARAMETERS AND THERMODYNAMIC AND PHYSICAL PROPERTIES OF LIQUID STEELS WERE ALSO ADDED, AS WELL AS VARYING THE FLUID VELOCITY IN ORDER TO ANALYZE ITS BEHAVIOR IN THE MENISCUS REGION. OF ALL THE CONFIGURATIONS, ONLY THE VALVE WITH A -13º OUTLET AT A DEPTH OF 250 MM SHOWED A VELOCITY PROFILE OUTSIDE THE RANGE CONSIDERED IDEAL BY THE LITERATURE, BETWEEN 0.2 M/S AND 0.4 M/S. SPEEDS BELOW THE LOWER LIMIT CAN CAUSE THE MENISCUS TO FREEZE. SPEEDS ABOVE 0.4 M/S CAN CAUSE SLAG/FLUX POWDER TO BE DRAGGED, GENERATING INCLUSIONS. THE RESULTS SHOW THAT THE GEOMETRIC MODIFICATIONS AND THE ARRANGEMENT OF THE SUBMERGED VALVE INSIDE THE CASTING MOLD INFLUENCE THE FLOW OF LIQUID STEEL IN THE MENISCUS REGION. THE RESULTS SHOW THAT THERE ARE CONDITIONS THAT FAVOR THE REMOVAL OF INCLUSIONS AND PREVENT THE FORMATION OF NEW ONES.

INCLUSIONS ARE UNDESIRABLE CONTAMINANTS FOR THE STEEL INDUSTRY AND ARE A CONSEQUENCE OF THE NUMEROUS CHEMICAL AND THERMODYNAMIC REACTIONS PRESENT IN ITS PROCESSES, WHICH MAKES IT ESSENTIAL TO HAVE REFINED PRODUCTION CONTROL. USING ANSYS® SIMULATION SOFTWARE, 6 SUBMERGED VALVE CONFIGURATIONS WERE MADE, BASED ON THEIR PROJECTION ANGLE AND DEPTH INSIDE THE MOLD. THE ANGLES EVALUATED WERE -11.4º AND -13º AT DEPTHS OF 150MM, 200MM AND 250MM. IN ADDITION, CONTOUR PARAMETERS AND THERMODYNAMIC AND PHYSICAL PROPERTIES OF LIQUID STEELS WERE ALSO ADDED, AS WELL AS VARYING THE FLUID VELOCITY IN ORDER TO ANALYZE ITS BEHAVIOR IN THE MENISCUS REGION. OF ALL THE CONFIGURATIONS, ONLY THE VALVE WITH A -13º OUTLET AT A DEPTH OF 250 MM SHOWED A VELOCITY PROFILE OUTSIDE THE RANGE CONSIDERED IDEAL BY THE LITERATURE, BETWEEN 0.2 M/S AND 0.4 M/S. SPEEDS BELOW THE LOWER LIMIT CAN CAUSE THE MENISCUS TO FREEZE. SPEEDS ABOVE 0.4 M/S CAN CAUSE SLAG/FLUX POWDER TO BE DRAGGED, GENERATING INCLUSIONS. THE RESULTS SHOW THAT THE GEOMETRIC MODIFICATIONS AND THE ARRANGEMENT OF THE SUBMERGED VALVE INSIDE THE CASTING MOLD INFLUENCE THE FLOW OF LIQUID STEEL IN THE MENISCUS REGION. THE RESULTS SHOW THAT THERE ARE CONDITIONS THAT FAVOR THE REMOVAL OF INCLUSIONS AND PREVENT THE FORMATION OF NEW ONES.

Keywords

Meniscus; Mold; Inclusion; Casting.

Meniscus; Mold; Inclusion; Casting.