浸没侧吹气体的流动和穿透行为

朱帅; 赵秋月; 李小龙; 刘燕; 李天赐; 张廷安

doi:10.1007/s12613-022-2585-2

Volume 30 Issue 6

Jun. 2023

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文章导航 > 矿物冶金与材料学报（英文） > 2023 > 30(6): 1067-1077

Shuai Zhu, Qiuyue Zhao, Xiaolong Li, Yan Liu, Tianci Li, and Ting’an Zhang, Flow and penetration behavior of submerged side-blown gas, Int. J. Miner. Metall. Mater., 30(2023), No. 6, pp. 1067-1077. https://doi.org/10.1007/s12613-022-2585-2

Cite this article as:

Shuai Zhu, Qiuyue Zhao, Xiaolong Li, Yan Liu, Tianci Li, and Ting’an Zhang, Flow and penetration behavior of submerged side-blown gas, Int. J. Miner. Metall. Mater., 30(2023), No. 6, pp. 1067-1077. https://doi.org/10.1007/s12613-022-2585-2

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研究论文

浸没侧吹气体的流动和穿透行为

1)
多金属共生矿生态化冶金教育部重点实验室, 沈阳 110819, 中国
2)
东北大学冶金学院, 沈阳 110819, 中国

通讯作者:
张廷安 E-mail: zta2000@163.net

文章亮点

(1) 采用高速摄像-数字图像处理-统计的方法，系统且定量地研究了浸没侧吹气体的时空分布和穿透深度。

(2) 利用时间平均图像，系统阐述了鼓泡和稳定射流机制之间的显著差异。

(3) 建立了关于气体穿透深度的新的无量纲关联式。

中文摘要

浸没侧吹技术目前被广泛应用于火法冶金，极大促进了冶金工业的发展。本文旨在进一步了解火法冶金中的气液相互作用机制。本文采用高速摄像-数字图像处理-统计方法，系统研究了气体流量、喷嘴直径和喷嘴倾斜角度对空气-水体系中浸没侧吹气体的时空分布和穿透行为的影响。结果表明，随着气体流量的增加，气体运动将逐渐从鼓泡机制转变为稳定射流机制，并将逐渐形成完整射流结构。当气体流量较低时，在喷嘴上方将形成一个由大气泡构成的气泡区域。当气体流量和喷嘴直径均较大时，在喷嘴上方将形成一个由微小气泡构成的气泡区域。增加喷嘴倾斜角度将导致形成完整射流结构需要更大的气体流量。在采样时间内，无量纲水平和竖直穿透深度呈高斯分布。减小喷嘴直径，增加气体流量或喷嘴倾斜角度，将扩大气体的分布范围和采样时间内气体穿透深度的离散性。通过量纲分析，获得了误差在±20%以内的关于气体穿透深度的新关联式。由当前研究提出的关联式计算出的120 t转炉中氩气-熔体系统的水平穿透深度与文献中关联式的计算结果和文献中的数值模拟结果非常接近。

关键词:

Research Article

Flow and penetration behavior of submerged side-blown gas

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Abstract

Abstract

To assess the widely used submerged side-blowing in pyrometallurgy, a high-speed camera–digital image processing–statistical approach was used to systematically investigate the effects of the gas flow rate, nozzle diameter, and inclination angle on the space–time distribution and penetration behavior of submerged side-blown gas in an air–water system. The results show that the gas motion gradually changes from a bubbling regime to a steady jetting regime and the formation of a complete jet structure as the flow rate increases. When the flow rate is low, a bubble area is formed by large bubbles in the area above the nozzle. When the flow rate and the nozzle diameter are significant, a bubble area is formed by tiny bubbles in the area above the nozzle. The increased inclination angle requires a more significant flow rate to form a complete jet structure. In the sampling time, the dimensionless horizontal and vertical penetration depths are Gaussian distributed. Decreasing the nozzle diameter and increasing the flow rate or inclination angle will increase the distribution range and discreteness. New correlations for a penetration depth with an error of ±20% were obtained through dimensional analysis. The dimensionless horizontal penetration depth of an argon-melt system in a 120 t converter calculated by the correlation proposed by the current study is close to the result calculated by a correlation in the literature and a numerical simulation result in the literature.
- submerged side-blowing;
- jet;
- high-speed camera;
- image processing;
- dimensional analysis

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