多孔道底吹喷枪搅拌的数值模拟与强化机理分析

doi:10.16085/j.issn.1000-6613.2019-1871

摘要/Abstract

摘要：

底吹富氧搅拌是熔池熔炼的一种关键强化技术，对品位低、杂质多的矿产资源具有很好适应性，底吹喷枪是其关键工艺设备。本文将数值模拟与数理统计相结合，建立了多孔道底吹喷枪强化搅拌的三维数学模型，并通过水力学模型实验对数学模型进行了验证。针对模型计算结果，以气泡上升时间、液体的气含率方差和平均湍流强度等为评价标准，对直管及多孔道底吹喷枪搅拌过程的混合均匀度进行对比研究。结果表明：多孔道喷枪喷吹方式在提高熔体搅动能的同时能使中上部熔体的混合更为充分，并在生产实践中取得了良好的应用效果。

关键词: 底吹搅拌, 多孔道喷枪, 气液两相流, 混合

Abstract:

Bottom-blowing oxygen-enriched stirring is a key technology for the strengthening of molten pool smelting, which has good adaptability to mineral resources with low grade and high impurity. In this study, a three-dimensional mathematical model of the multi-channel spray lance was established to strengthen stirring based on the combination of numerical simulation and mathematical statistics. The mathematical model was further verified through the hydraulic model experiment. According to the calculation results of the model, a comparative study on the mixing uniformity of the stirring process of the straight tube and the multi-channel spray lance was carried out based on the evaluation standard of bubble rise time， gas holdup variance and the average turbulent intensity of liquid. The results showed that the multi-channel spray lance blowing method was able to improve the agitation energy of the melts with a more comprehensive mixing of the middle-upper melts. This study provided a good application effect in production practice.

Key words: bottom-blowing stirring, multi-channel spray lance, gas-liquid flow, mixing

中图分类号:

TF 811

李世旺, 王仕博, 王华, 汪雨慧, 陈全坤. 多孔道底吹喷枪搅拌的数值模拟与强化机理分析[J]. 化工进展, 2020, 39(9): 3563-3573.

Shiwang LI, Shibo WANG, Hua WANG, Yuhui WANG, Quankun CHEN. Numerical simulation and strengthening mechanism analysis of multi-channel bottom-blowing spray lance stirring[J]. Chemical Industry and Engineering Progress, 2020, 39(9): 3563-3573.

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