Scholarlink

<p>During the final stage of ladle pouring, vortices commonly form and leads to the entrainment of slag; the presence of this slag has numerous adverse effects on both the quality of the molten steel and the stability of the steelmaking process. Based on the concept of double nozzles, the formation mechanism of vortices in the steel casting process was examined using double nozzles, and the reasons for the better performance of double nozzles over single nozzles were analyzed using a combination of physical and numerical simulations. In addition, the effects of the initial tangential velocity and distance between nozzles on vortex formation were investigated. These findings indicated that the opposite directions of the tangential velocity between the two nozzles were the primary cause for the suppression of vortex formation. When a single nozzle with a diameter of 0.0424 m was changed into double nozzles with equal equivalent areas, the height of vortex formation for double nozzle casting was reduced by 24.4 pct with respect to that of a single nozzle; additionally, compared with that of a single nozzle, the critical height of the vortex for double nozzle casting was reduced by 33.3 pct. When the initial tangential velocity was increased from 0.01 rad/s to 0.05 rad/s, the critical height of the vortex increased by 46.7 pct for single nozzle ladle casting and 23.1 pct for double nozzle 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

Formation Mechanism and Suppression of Vortices During the Steel Pouring Process in a Double Nozzle Ladle

  • 期刊论文

  • 发表日期：

    2025年3月14日

查看全文
  • Gen-Jun Lu,
  • Xin-Gang Ai,
  • Hong-Bo Zeng,
  • Rui Guan,
  • Sheng-Li Li,
  • Rui-Dong Zhang

摘要

During the final stage of ladle pouring, vortices commonly form and leads to the entrainment of slag; the presence of this slag has numerous adverse effects on both the quality of the molten steel and the stability of the steelmaking process. Based on the concept of double nozzles, the formation mechanism of vortices in the steel casting process was examined using double nozzles, and the reasons for the better performance of double nozzles over single nozzles were analyzed using a combination of physical and numerical simulations. In addition, the effects of the initial tangential velocity and distance between nozzles on vortex formation were investigated. These findings indicated that the opposite directions of the tangential velocity between the two nozzles were the primary cause for the suppression of vortex formation. When a single nozzle with a diameter of 0.0424 m was changed into double nozzles with equal equivalent areas, the height of vortex formation for double nozzle casting was reduced by 24.4 pct with respect to that of a single nozzle; additionally, compared with that of a single nozzle, the critical height of the vortex for double nozzle casting was reduced by 33.3 pct. When the initial tangential velocity was increased from 0.01 rad/s to 0.05 rad/s, the critical height of the vortex increased by 46.7 pct for single nozzle ladle casting and 23.1 pct for double nozzle casting.