Scholarlink

<p>High-speed continuous casting technology demonstrates significant potential in substantially improving productivity, reducing production costs, and achieving energy conservation and emission reduction. However, elevated casting speeds readily trigger severe mold-level fluctuations, slag entrapment, and crack defects. To address these issues, a novel submerged entry nozzle (N-SEN) has been developed, which effectively disperses and homogenizes the steel flow stream inside the mold through design of the flow-splitting chamber and flow-splitting hole. Through numerical simulation and hydraulic model, this study systematically compares and analyzes the effects of the traditional submerged entry nozzle (T-SEN) and the N-SEN on the flow field characteristics, level fluctuation, slag entrapment, heat transfer behavior, and solidification process within the mold. The results show that under casting speeds of 2.0, 2.2, and 2.4 m/min, the N-SEN significantly reduces the impact of steel flow on the narrow side of the mold. Compared to the T-SEN, the N-SEN reduced the mold-level fluctuation amplitude by 66.67, 54.11, and 47.22 pct, respectively, and decreased the meniscus flow velocity by 83.41, 75.52, and 73.88 pct, respectively. Regarding heat transfer and solidification, the N-SEN lowered the slab surface temperature and increased the shell thickness at the mold outlet. Specifically, at the mold outlet, the N-SEN reduced the temperature at the center of the slab wide face by 3.8 K, 2.2 K, and 1.7 K, while the shell thickness increased by 0.38, 0.13, and 0.31 mm, respectively. At the narrow-face center, the temperature was reduced by 26.4 K, 21.8 K, and 31.4 K, with corresponding increases in shell thickness of 2.85, 2.15, and 2.56 mm, respectively. In terms of slag entrapment, the N-SEN achieved an average reduction in slag entrapment frequency of 97.44, 61.36, and 47.14 pct, respectively. The design and effectiveness of the N-SEN provide a new design concept for developing SENs suitable for other continuous casting slabs and strongly promotes the rapid advancement of high-speed continuous casting.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Numerical Simulation of a Novel Submerged Entry Nozzle for High-Speed Continuous Casting Slabs

  • 期刊论文

  • 发表日期：

    2026年1月16日

查看全文
  • Shi-Wei Zheng,
  • Zhao-Zhen Cai,
  • Miao-Yong Zhu

摘要

High-speed continuous casting technology demonstrates significant potential in substantially improving productivity, reducing production costs, and achieving energy conservation and emission reduction. However, elevated casting speeds readily trigger severe mold-level fluctuations, slag entrapment, and crack defects. To address these issues, a novel submerged entry nozzle (N-SEN) has been developed, which effectively disperses and homogenizes the steel flow stream inside the mold through design of the flow-splitting chamber and flow-splitting hole. Through numerical simulation and hydraulic model, this study systematically compares and analyzes the effects of the traditional submerged entry nozzle (T-SEN) and the N-SEN on the flow field characteristics, level fluctuation, slag entrapment, heat transfer behavior, and solidification process within the mold. The results show that under casting speeds of 2.0, 2.2, and 2.4 m/min, the N-SEN significantly reduces the impact of steel flow on the narrow side of the mold. Compared to the T-SEN, the N-SEN reduced the mold-level fluctuation amplitude by 66.67, 54.11, and 47.22 pct, respectively, and decreased the meniscus flow velocity by 83.41, 75.52, and 73.88 pct, respectively. Regarding heat transfer and solidification, the N-SEN lowered the slab surface temperature and increased the shell thickness at the mold outlet. Specifically, at the mold outlet, the N-SEN reduced the temperature at the center of the slab wide face by 3.8 K, 2.2 K, and 1.7 K, while the shell thickness increased by 0.38, 0.13, and 0.31 mm, respectively. At the narrow-face center, the temperature was reduced by 26.4 K, 21.8 K, and 31.4 K, with corresponding increases in shell thickness of 2.85, 2.15, and 2.56 mm, respectively. In terms of slag entrapment, the N-SEN achieved an average reduction in slag entrapment frequency of 97.44, 61.36, and 47.14 pct, respectively. The design and effectiveness of the N-SEN provide a new design concept for developing SENs suitable for other continuous casting slabs and strongly promotes the rapid advancement of high-speed continuous casting.