Effect of Converter Shape on Reaction Rate between Slag and Metal in a Combined Blowing Converter with Inert Gas Bottom Blowing

IF 0.3 4区材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING

Tetsu To Hagane-journal of The Iron and Steel Institute of Japan Pub Date : 2023-01-15 DOI:10.2355/tetsutohagane.tetsu-2021-042

H. Yoshida, Amano Shota, Nakai Yoshie, Yukio Takahashi, N. Kikuchi

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引用次数: 0

Abstract

: The peroxidation of molten steel is a problem occurred in a combined blowing converter with inert gas blowing. It caused by a relatively weak mixing power of bottom blown inert gas compared with that of bottom blown oxygen gas. In order to resolve the problem, several methods for optimizing top and bottom blowing conditions has developed. However, the effect of the equipment condition such as converter shape on the met-allurgical characteristics has not been investigated enough. In this study, the effect of H/D (ratio of bath depth H to bath diameter D) on the reaction rate between slag and metal, and furnace body vibration in converter was investigated by water model experiments. It was found that the apparent reaction rate constant, kA/ V w , increase with increasing H/D, except for the case of H/D=0.85. It seemed that the change of kA/V w with increasing H/D has a relation to the behavior of bath vibration. From the analysis based on the bath surface vibration model, it was indicated that the change of H/D affects the bath surface vibration behavior and the formation behavior of slag emulsion, and these effects increase the reaction interface between slag and metal.

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转炉形状对惰性气体底吹组合式转炉渣金属反应速率的影响

钢水过氧化是在转炉与惰性气体联合吹炼时发生的问题。这是由于底吹惰性气体与底吹氧气相比，混合力相对较弱造成的。为了解决这一问题，开发了几种优化顶吹和底吹条件的方法。然而，转炉形状等设备条件对冶金特性的影响研究还不够深入。通过水模型试验，研究了熔池深度与熔池直径之比H/D对炉渣与金属反应速率及转炉炉体振动的影响。除H/D=0.85外，表观反应速率常数kA/ V w随H/D的增大而增大。随着H/D的增加，kA/V / w的变化似乎与镀液的振动行为有关。基于熔池表面振动模型的分析表明，H/D的变化影响熔池表面振动行为和炉渣乳化液的形成行为，这些影响增加了炉渣与金属的反应界面。

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

Tetsu To Hagane-journal of The Iron and Steel Institute of Japan 工程技术-冶金工程

CiteScore

0.70

自引率

33.30%

发文量

审稿时长

6-12 weeks

期刊介绍： The journal ISIJ International first appeared in 1961 under the title Tetsu-to-Hagané Overseas. The title was changed in 1966 to Transactions of The Iron and Steel Institute of Japan and again in 1989 to the current ISIJ International. The journal provides an international medium for the publication of fundamental and technological aspects of the properties, structure, characterization and modeling, processing, fabrication, and environmental issues of iron and steel, along with related engineering materials. Classification I Fundamentals of High Temperature Processes II Ironmaking III Steelmaking IV Casting and Solidification V Instrumentation, Control, and System Engineering VI Chemical and Physical Analysis VII Forming Processing and Thermomechanical Treatment VIII Welding and Joining IX Surface Treatment and Corrosion X Transformations and Microstructures XI Mechanical Properties XII Physical Properties XIII New Materials and Processes XIV Social and Environmental Engineering.