Mathematical Model of RH Blow Argon Mode Affecting： Decarburization Rate in Ultra-Low Carbon Steel Refining

• Published in: Journal of iron and steel research, international international, 2012-05, Vol.19 (5), p.23-28
• Main Authors: LI, Chong-wei, CHENG, Guo-guang, WANG, Xin-hua, ZHU, Guo-sen, CUI, Ai-min
• Format: Article
• Language: English
• Subjects: Applied and Technical Physics; Argon; argon flowrate; decarburization; Droplets; Engineering; Iron and steel industry; Low carbon steels; Machines; Manufacturing; Materials Engineering; Materials Science; mathematical model; Mathematical models; Metallic Materials; Physical Chemistry; Processes; Refining; Steel making; Steels; vacuum; 吹氩; 数学模型; 气流量; 脱碳; 自由表面; 超低碳钢; 钢铁冶炼
• ISSN: 1006-706X; 2210-3988
• DOI: 10.1016/S1006-706X(12)60095-8

A mathematical model in present study has been established to investigate the effect of Rheinstahl Heraeus （RH） blow argon mode on the decarburization rate in ultra-low carbon steel refining based on the RH equipment of Shougang Qian＇an Iron and Steel Co Ltd （SQISCO）. The calculated results show that the increase of argon flowrate promotes the carbon elimination from argon gas bubble surface, molten steel free surface in vacuum as well as splash droplet surface, while reduces that from the interior of liquid steel. It has been found the critical turning point of flowrate ascension is at the 5th minute and the optimum blow argon flowrate in later stage is 2 100 L/min in accord- ance with the 2 stages argon blow mode, which have been confirmed in the commercial production in SQISCO.