ISSN 2594-5300
52º Seminário de Aciaria, Fundição e Metalurgia de Não-Ferrosos — vol. 52, num.52 (2023)
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Abstract
The outlet flow from the submerged entry nozzle (SEN) for continuous casting of steel affects the flow conditions inside the mold and subsequently the quality of the cast slab. A water model test was conducted to investigate the effect of various SEN structures on the flow inside the mold and to solve the problem of adverse flow that can negatively affect slab quality. The introduction of a double annular step structure to the inner tube eliminated the inherent biased flow that occurs inside the nozzle. In addition, computational fluid dynamics (CFD) modeling was conducted to analyze the effects of changing outlet port shape on the internal mold flow conditions. By adjusting the outer and inner shape of the outlet ports, it was possible to suppress the occurrence of suction flow, which adversely affects internal mold flow. Depending on the mold size and casting conditions, an optimized port shape can control the meniscus flow and the downward flow velocity along the narrow mold face. By optimizing both the inner tube of the nozzle and outlet port structure, flow conditions throughout the mold were improved, which will ultimately reduce cast slab defects.
The outlet flow from the submerged entry nozzle (SEN) for continuous casting of steel affects the flow conditions inside the mold and subsequently the quality of the cast slab. A water model test was conducted to investigate the effect of various SEN structures on the flow inside the mold and to solve the problem of adverse flow that can negatively affect slab quality. The introduction of a double annular step structure to the inner tube eliminated the inherent biased flow that occurs inside the nozzle. In addition, computational fluid dynamics (CFD) modeling was conducted to analyze the effects of changing outlet port shape on the internal mold flow conditions. By adjusting the outer and inner shape of the outlet ports, it was possible to suppress the occurrence of suction flow, which adversely affects internal mold flow. Depending on the mold size and casting conditions, an optimized port shape can control the meniscus flow and the downward flow velocity along the narrow mold face. By optimizing both the inner tube of the nozzle and outlet port structure, flow conditions throughout the mold were improved, which will ultimately reduce cast slab defects.
Keywords
Submerged Entry Nozzle; Water Modeling; Flow Control; CFD
Submerged Entry Nozzle; Water Modeling; Flow Control; CFD
How to refer
Palvanov, Roman.
EFFECT OF SUBMERGED ENTRY NOZZLE INNER TUBE SHAPE ON MOLD FLOW
,
p. 842-855.
In: 52º Seminário de Aciaria, Fundição e Metalurgia de Não-Ferrosos,
São Paulo,
2023.
ISSN: 2594-5300
, DOI 10.5151/2594-5300-39475
