转炉吹炼水冷活动烟罩对烟气逸散控制机理的数值模拟  

Numerical simulation of sulfur-containing gas escape control mechanism by water-cooled movable hood in converter blowing process

作　　者：于洪石 杨世亮 阳坤林 于海波 何恩 王华[1] YU Hongshi;YANG Shiliang;YANG Kunlin;YU Haibo;HE En;WANG Hua(State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization,Kunming University of Science and Technology,Kunming 650093,China;Southwest Copper Branch of Yunnan Copper Co.,Ltd.,Kunming 650102,China)

机构地区：[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 [2]云南铜业股份有限公司西南铜业分公司,昆明650102

出　　处：《中国有色金属学报》2024年第8期2787-2800,共14页The Chinese Journal of Nonferrous Metals

基　　金：国家重点研发计划资助项目(2023YFB2407300)。

摘　　要：为了研究转炉铜锍吹炼过程中水冷活动烟罩对烟道内含硫烟气逸散的控制效果,构建了基于RANS方法的多组分流动传热的数值仿真模型,研究了不同转炉角度、不同烟罩限位和长度下的转炉烟气污染控制机理和效果评估。结果表明:转炉烟气的控制机理主要为水冷活动烟罩的遮挡作用和底部进气的气封作用。烟道出口的抽吸作用使气流向上流动,气封能力随着进出口压差减小而下降。延长烟罩可以增强封挡效果和二氧化硫以及三氧化硫的富集效果,工艺烟道内二氧化硫的浓度从7.8%提升至9.8%,三氧化硫的浓度从1.1%提升至1.4%。此外,由于高温区域主要集中在转炉出口附近,峰值温度约为1473 K,因此需要加强相应结构对高温酸性气体冲刷的防护。In order to investigate the efficacy of the water-cooled movable hood in controlling flue gas emissions during the copper matte blowing process in converters,a numerical simulation model based on the Reynolds-Averaged Navier-Stokes(RANS)method for multi-component flow and heat transfer was developed in this study.The research examined the impact of varying converter angles,hood positions,and hood lengths on controlling converter flue gas pollution and elucidated the underlying control mechanisms.The results show that the mechanism of converter flue gas control is the combined effect of the shielding effect of the hood and the seal effect of the bottom inlet flow.The suction effect at the flue outlet causes the gas to flow upward,and the sealing capacity decreases as the pressure difference between the inlet and outlet decreases.The extended hood enhances the shielding effect,and the enrichment of sulfur dioxide and sulfur trioxide is therefore enhanced.Specifically,the concentration of sulfur trioxide in the process flue increases from 1.1%to 1.4%,and the concentration of sulfur dioxide increases from 7.8%to 9.8%.In addition,the high-temperature area is mainly concentrated near the converter outlet,with a peak temperature of about 1473 K.It is necessary to strengthen the protection against hightemperature acid gas erosion.

关 键 词：密封烟罩系统 转炉吹炼 烟气逸散控制 数值模拟 组分分布 

分 类 号：TG294[金属学及工艺—铸造]