Numerical study on flow characteristics of large copper smelting bottom-blown furnace under strong and weak coupling oxygen supply  

强-弱耦合供氧下大型铜熔炼底吹炉流动特性数值研究

作　　者：JIANG Bao-cheng GUO Xue-yi WANG Song-song WANG Qin-meng 姜保成;郭学益;王松松;王亲猛

机构地区：[1]School of Metallurgy and Environment,Central South University,Changsha 410083,China [2]National&Regional Joint Engineering Research Center of Nonferrous Metal Resources Recycling,Changsha 410083,China [3]Hunan Key Laboratory of Nonferrous Metal Resources Recycling,Changsha 410083,China

出　　处：《Journal of Central South University》2025年第2期363-375,共13页中南大学学报(英文版)

基　　金：Project(2022YFC3901501)supported by the National Key R&D Program of China;Project(U20A20273)supported by the National Natural Science Foundation of China;Project(2022JJ10078)supported by the Natural Science Foundation for Distinguished Young Scholars of Hunan Province,China;Project(2021RC3005)supported by the Science and Technology Innovation Program of Hunan Province,China。

摘　　要：The melt stirring in a large copper smelting oxygen bottom-blown furnace is caused by the large amount of gas movement blown in by two rows of oxygen lances.At present,the two rows of oxygen lances provide oxygen of equal strength,and the stirring in the central area of the melt is insufficient,which restricts the efficient progress of the smelting reaction.This study proposes a strong-weak coupling oxygen supply method and establishes an equivalent model based on a large bottom-blown furnace(LBBF)of an enterprise to simulate the bubble characteristics and flow characteristics of the molten pool.The results show that adjusting the flow ratio between the two rows of oxygen lances can create a“strong”and a“weak”coexisting source of disturbance in an LBBF.It is worth noting that when the flow rate ratio of the two rows of oxygen lances is 1.6,the peak velocity generated by the“strong”distur bance source in the molten pool increases by 18.92%,and the disturbance range increases.This method effectively strengthens the stirring in the central area of the molten pool,improves smelting efficiency,and does not produce harmful melt splashes.It provides important guidance for optimizing production practice.大型铜熔炼氧气底吹炉的熔体搅拌源于两排氧枪吹入的大量气体运动。目前两排氧枪同等强度供氧,熔池中心区域的搅拌不足,制约熔炼反应的高效进行。本研究提出了一种强-弱耦合的氧气供应模式,并建立了一个基于企业大型底吹炉的等效模型来模拟熔池的气泡特性和流动特性。结果表明,调整两排氧枪之间的流量比,可以在大型底吹炉内产生“强”和“弱”共存的扰动源。值得注意的是,在两排氧枪流量比为1.6时,“强”扰动源在熔池内产生的速度峰值增加18.92%,并且扰动范围增大。此法有效加强熔池中心区域搅拌,提高熔炼效率的同时未产生有害的熔体飞溅,为生产实践优化提供了重要指导。

关 键 词：large bottom-blown furnace oxygen supply flow characteristics initial bubbles 

分 类 号：TF811[冶金工程—有色金属冶金]