正弦脉动进气强化顶吹熔炼炉内气-渣动量传递的数值研究

万章豪; 杨世亮; 孔德颂; 李东波; 胡建杭; 王华

doi:10.1007/s12613-023-2705-7

Volume 31 Issue 2

Feb. 2024

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文章导航 > 矿物冶金与材料学报（英文） > 2024 > 31(2): 301-314

Zhanghao Wan, Shiliang Yang, Desong Kong, Dongbo Li, Jianhang Hu, and Hua Wang, Numerical investigation of sinusoidal pulsating gas intake to intensify the gas–slag momentum transfer in the top-blown smelting furnace, Int. J. Miner. Metall. Mater., 31(2024), No. 2, pp. 301-314. https://doi.org/10.1007/s12613-023-2705-7

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Zhanghao Wan, Shiliang Yang, Desong Kong, Dongbo Li, Jianhang Hu, and Hua Wang, Numerical investigation of sinusoidal pulsating gas intake to intensify the gas–slag momentum transfer in the top-blown smelting furnace, Int. J. Miner. Metall. Mater., 31(2024), No. 2, pp. 301-314. https://doi.org/10.1007/s12613-023-2705-7

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研究论文

正弦脉动进气强化顶吹熔炼炉内气-渣动量传递的数值研究

1)
昆明理工大学省部共建复杂有色金属资源清洁利用国家重点实验室，昆明 650093，中国
2)
云南铜业股份有限公司西南铜业分公司，昆明 650102，中国

通讯作者:
杨世亮 E-mail: yangshiliang0802@163.com

文章亮点

(1) 提出了顶吹多相流动过程正弦脉动进气新方式；

(2) 气泡前缘始终附着在喷枪边界直至气泡由自由表面喷发；

(3) 气泡边界处的轴向速度分量和温度基于喷枪中心轴对称；

(4) 气泡边界处的高速区域总是伴随着低温度分布；

(5) V_g = 58 + 10sin(2πt)的进气速度可以抑制铜熔渣的喷溅以及炉内的搅拌死区。

中文摘要

基于计算流体动力学方法探讨了气泡在顶吹熔炼炉内的形态变化特征以及气泡边界处热物理特性。探讨了流体相的基本特性（如喷溅体积、铜渣搅拌死区和气相穿透深度），以及正弦脉动进气对相间动量传递性能的影响。结果表明，在气泡腰部和喷枪下方分别出现了两个相对较大和两个相对较小的涡流。大涡流的扩张及小涡旋的收缩共同导致了气泡腰部处的形态收缩。与注气速度(V_g)为58 m/s 的工况相比，V_g = 58 + 10sin(2πt) 工况下的熔渣喷溅体积和搅拌死区体积分别减少了24.9%和23.5%。后者的气体穿透深度和熔渣运动速度分别是前者的1.03 倍和1.31 倍。

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Research Article

Numerical investigation of sinusoidal pulsating gas intake to intensify the gas–slag momentum transfer in the top-blown smelting furnace

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Abstract

Abstract

The variation characteristics of bubble morphology and the thermal-physical properties of bubble boundary in the top-blown smelting furnace were explored by means of the computational fluid dynamics method. The essential aspects of the fluid phase (e.g., splashing volume, dead zone of copper slag, and gas penetration depth) were explored together with the effect of sinusoidal pulsating gas intake on the momentum-transfer performance between phases. The results illustrated that two relatively larger vortices and two smaller vortices appear in the bubble waist and below the lance, respectively. The expansion of larger ones as well as the shrinking of smaller ones combine to cause the contraction of the bubble waist. Compared to the results of the case with a fixed gas injection velocity (V_g = 58 m/s), the splashing volume and dead zone volume of the slag under the V_g = 58 + 10sin(2πt) condition are reduced by 24.9% and 23.5%, respectively, where t represents the instant time. Gas penetration depth and slag motion velocity of the latter are 1.03 and 1.31 times higher than those of the former, respectively.
- top-blown smelting furnace;
- pulsed flow;
- volume of fluid;
- penetration depth;
- splashing volume

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