Effect of slag properties and non-uniform bottom blowing gas supply mode on fluid flow and mixing behavior in converter

IF 0.9 4区材料科学 Q3 METALLURGY & METALLURGICAL ENGINEERING

Metallurgical Research & Technology Pub Date : 2023-01-01 DOI:10.1051/metal/2023064

Zhao Liu, Shusen Cheng, Yong Liu, Pengbo Liu, Weiyang Zhang

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引用次数: 0

Abstract

Bottom blowing plays an important role in improving the physical and chemical reaction speed in the molten bath of combined blowing converter. In this paper, physical and numerical simulations were performed to study the influence of slag properties and non-uniform bottom blowing gas supply mode on flow and mixing behavior of molten bath in a 210 t converter. Compared with the two-phase case, the average velocity in the three-phase case is lower and the flow field is asymmetric. The increase of slag thickness, viscosity and surface tension will reduce the average velocity of the molten bath and make the mixing time longer. The numerical simulation of ten cases is carried out to study the effect of partial blockage of the tuyere on the overall mixing. The results showed that the existence of the central vortex and the long horizontal flow are beneficial to promote the overall mixing, while the central collision and the vortex at the edge play the opposite role in the non-uniform mode. The smaller flow difference between the tuyeres is unfavorable to the mixing of the molten bath. Reasonable tuyere flow difference can promote the horizontal flow of the molten bath and improving the stirring force.

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渣性质和不均匀底吹供气方式对转炉内流体流动和混合行为的影响

底吹对提高组合吹炼转炉熔池的理化反应速度具有重要作用。本文采用物理模拟和数值模拟的方法，研究了炉渣性质和不均匀底吹送气方式对210 t转炉熔池流动和混合行为的影响。与两相情况相比，三相情况下的平均速度较低，流场不对称。熔渣厚度、粘度和表面张力的增加会降低熔池的平均速度，使混合时间延长。通过十种情况的数值模拟，研究了风口部分堵塞对整体混合的影响。结果表明，在非均匀模式下，中心涡和长水平流的存在有利于促进整体混合，而中心碰撞和边缘涡的存在则相反。风口之间的流量差较小，不利于熔液的混合。合理的风口流量差可以促进熔池的水平流动，提高搅拌力。

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

Metallurgical Research & Technology METALLURGY & METALLURGICAL ENGINEERING-

CiteScore

1.70

自引率

9.10%

发文量

审稿时长

4.4 months

期刊介绍： Metallurgical Research and Technology (MRT) is a peer-reviewed bi-monthly journal publishing original high-quality research papers in areas ranging from process metallurgy to metal product properties and applications of ferrous and non-ferrous metals and alloys, including light-metals. It covers also the materials involved in the metal processing as ores, refractories and slags. The journal is listed in the citation index Web of Science and has an Impact Factor. It is highly concerned by the technological innovation as a support of the metallurgical industry at a time when it has to tackle severe challenges like energy, raw materials, sustainability, environment... Strengthening and enhancing the dialogue between science and industry is at the heart of the scope of MRT. This is why it welcomes manuscripts focusing on industrial practice, as well as basic metallurgical knowledge or review articles.