Design of a new oxygen lance to improve molten pool multi-phase flow characteristics with optimization based on numerical simulations

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology Pub Date : 2025-04-21 DOI:10.1016/j.apt.2025.104896

Haowei Yan , Jun Chen , Chao Li , Xiaoli Su , Pengyue Guo , Xizhong An , Hao Zhang

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Abstract

In this study, a new type of ring seam-hole converter oxygen lance based on the jet convergence phenomenon is proposed to enhance the mixing efficiency in the converter smelting process. Firstly, by comparing with the published data from water model experiment, the accuracy of the Euler-Euler numerical model in simulating the top-blowing stirring process of the converter is validated. Then, the effects of different width ratios and flow ratios of ring seam to the hole on the flow characteristics and wall erosion of the molten pool are systematically studied. The simulation results show that the new ring seam-hole converter oxygen lance can effectively improve the mixing efficiency and reduce wall erosion. With the increase of the width ratio of ring seam to hole, the mixing time first decreases, then increases and then decreases. At the same time, the wall erosion first decreases and then increases, and the optimal width ratio is 1:10 after comprehensive consideration. In addition, with the increase of flow ratio, the mixing time gradually decreases, and the wall erosion first decreases, then gently increases. Considering the wall erosion and mixing efficiency comprehensively, the optimal flow ratio is determined to be 1:12. Finally, the flow characteristics of the molten pool under the combined action of bottom-blowing bubble plume and top-blowing jet are studied, which can effectively improve the flow characteristics of molten pool. The results of this paper are helpful to understand the multiphase flow characteristics in converter and the mechanism of the bubble flow field in gas and liquid phases, and provide theoretical support for improving converter smelting efficiency and prolonging converter service life.

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基于数值模拟优化设计新型氧枪改善熔池多相流特性

为了提高转炉冶炼过程中的混合效率，提出了一种基于射流收敛现象的新型环缝孔转炉氧枪。首先，通过与已发表的水模型实验数据对比，验证了Euler-Euler数值模型模拟转炉顶吹搅拌过程的准确性。然后，系统研究了不同环缝宽度比和环缝流量比对熔池流动特性和熔池壁侵蚀的影响。仿真结果表明，新型环缝孔转炉氧枪能有效提高混合效率，减少壁面侵蚀。随着环缝与孔宽比的增大，混合时间先减小后增大再减小。同时墙体侵蚀先减小后增大，综合考虑后最优宽度比为1:10。此外，随着流量比的增加，混合时间逐渐减小，壁面侵蚀先减小后缓慢增大。综合考虑壁面侵蚀和混合效率，确定最优流比为1:12。最后，研究了底吹气泡羽和顶吹射流共同作用下熔池的流动特性，可以有效改善熔池的流动特性。研究结果有助于了解转炉内多相流动特性及气液两相气泡流场的形成机理，为提高转炉冶炼效率和延长转炉使用寿命提供理论支持。

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来源期刊

Advanced Powder Technology 工程技术-工程：化工

CiteScore

9.50

自引率

7.70%

发文量

424

审稿时长

55 days

期刊介绍： The aim of Advanced Powder Technology is to meet the demand for an international journal that integrates all aspects of science and technology research on powder and particulate materials. The journal fulfills this purpose by publishing original research papers, rapid communications, reviews, and translated articles by prominent researchers worldwide. The editorial work of Advanced Powder Technology, which was founded as the International Journal of the Society of Powder Technology, Japan, is now shared by distinguished board members, who operate in a unique framework designed to respond to the increasing global demand for articles on not only powder and particles, but also on various materials produced from them. Advanced Powder Technology covers various areas, but a discussion of powder and particles is required in articles. Topics include: Production of powder and particulate materials in gases and liquids(nanoparticles, fine ceramics, pharmaceuticals, novel functional materials, etc.); Aerosol and colloidal processing; Powder and particle characterization; Dynamics and phenomena; Calculation and simulation (CFD, DEM, Monte Carlo method, population balance, etc.); Measurement and control of powder processes; Particle modification; Comminution; Powder handling and operations (storage, transport, granulation, separation, fluidization, etc.)