A novel method for suppressing clogging of nozzle and stopper rod by electric current pulse during continuous casting of ultra-low carbon steel

IF 6.1 1区工程技术 Q1 ENGINEERING, MANUFACTURING

Journal of Manufacturing Processes Pub Date : 2025-07-09 DOI:10.1016/j.jmapro.2025.07.029

Kaiwang Chen , Dongxue Wang , Lei Yuan , Qiang Gu , Guoqi Liu , Hongxia Li

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引用次数: 0

Abstract

The effect of electric current pulse (ECP) on the clogging behavior of submerged entry nozzle (SEN) and stopper rod was studied during the continuous casting process of ultra-low carbon steel. Compared to normal treatment of SEN, ECP effectively prevented the deposition of alumina (Al₂O₃) inclusions at the nozzle outlet and stopper rod tip. Specifically, the application of ECP reduced the clogging thickness by more than 21 %, and the adhesion at the tip was mainly the tundish covering flux. Under ECP, the clogging density increased, which reduced the detachment of large-sized inclusions. Notably, the lattice distortions and dislocations of Al₂O₃ on the surface of the auxiliary electrode (negative electrode) increased its conductivity at high temperature. Furthermore, the mold level fluctuation and the change in inclusion size in the slab also showed that ECP could effectively suppress the clogging behavior, thereby enhancing the slab quality. This novel study provides important reference value and practical significance for applying external fields to suppress clogging of SEN and stopper rod.

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提出了一种利用电流脉冲抑制超低碳钢连铸过程中喷嘴和塞杆堵塞的新方法

研究了超低碳钢连铸过程中电流脉冲对浸没式入口喷嘴和塞杆堵塞行为的影响。与SEN的常规处理相比，ECP有效地阻止了氧化铝（Al2O3）夹杂物在喷嘴出口和塞杆尖端的沉积。具体而言，ECP的应用使堵塞厚度降低了21%以上，尖端的粘附主要是中间包覆盖剂。在ECP作用下，堵塞密度增大，大尺寸包裹体脱离减少。值得注意的是，辅助电极（负极）表面Al2O3的晶格畸变和位错增加了其在高温下的导电性。此外，结晶器水平的波动和板坯夹杂物尺寸的变化也表明，ECP可以有效地抑制板坯的堵塞行为，从而提高板坯质量。本研究为利用外场抑制SEN和塞杆堵塞提供了重要的参考价值和现实意义。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Manufacturing Processes ENGINEERING, MANUFACTURING-

CiteScore

10.20

自引率

11.30%

发文量

833

审稿时长

50 days

期刊介绍： The aim of the Journal of Manufacturing Processes (JMP) is to exchange current and future directions of manufacturing processes research, development and implementation, and to publish archival scholarly literature with a view to advancing state-of-the-art manufacturing processes and encouraging innovation for developing new and efficient processes. The journal will also publish from other research communities for rapid communication of innovative new concepts. Special-topic issues on emerging technologies and invited papers will also be published.