摘要
本文以某铅冶炼厂铜浮渣转炉为研究对象,通过对同轴射流甲烷燃烧器的试验数据进行对比,对燃烧模型与湍流模型进行了对比验证,构建了铜浮渣转炉内多物理场数值模型,对转炉运行工况的天然气燃烧与传热过程进行了数值模拟,深入分析了炉内速度场、温度场和浓度场的分布规律。结果表明:转炉内天然气混合充分、燃烧完全,空燃比和烧嘴结构的优化空间较小。炉头的1^(#)、2^(#)烧嘴火焰主要通过热辐射向熔体传热,而炉身的3^(#)、4^(#)烧嘴火焰则主要通过热对流向熔体传热。截面平均温度沿炉长方向(从炉头至炉尾)逐渐降低。在3^(#)、4^(#)烧嘴所在的径向截面,平均温度出现极值点,其位置与平均速度的极值点基本一致。转炉耐火砖受侵蚀较为严重的区域分别位于炉头顶部与炉头渣线附近,导致侵蚀的主要原因在于壁面局部高温。
This study focused on the copper dross converter at a specific lead smelter.By comparing the experimental data of coaxial jet methane burners,the combustion and turbulence models were validated.A multi-physics numerical model for the copper dross converter was developed,and simulations of natural gas combustion and heat transfer were carried out under various operating conditions.The distribution patterns of the velocity field,temperature field,and concentration field inside the converter were analyzed in detail.The results indicate that natural gas is thoroughly mixed and fully combusted in the converter,with limited optimization potential for the air-fuel ratio and burner structure.The flames from burners 1^(#)and 2^(#)at the converter top primarily transfer heat to the melt via thermal radiation,while the flames from burners 3^(#)and 4^(#)along the converter body mainly transfer heat through thermal convection.The average temperature along the converter length(from the top to the bottom)decreases progressively.At the radial section where burners 3^(#)and 4^(#)are located,a temperature peak is observed,coinciding with the position of the velocity peak.The regions of the refractory brick lining heavily eroded are found near the top of the converter head and the slag line of the converter head,with local high temperatures identified as the primary cause of erosion.
作者
闫红杰
谢环宇
胡卫文
何岳峰
刘勇
刘柳
YAN Hongjie;XIE Huanyu;HU Weiwen;HE Yuefeng;LIU Yong;LIU Liu(Central South University,School of Energy Science and Engineering,Changsha 410083,China;Shuikoushan Nonferrous Metals Group Co.,Ltd.,Hengyang 421513,China)
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2024年第11期3775-3791,共17页
The Chinese Journal of Nonferrous Metals
基金
湖南省科技人才托举工程计划资助项目(2023TJ-N10)。
关键词
铜浮渣转炉
天然气燃烧
数值模拟
烧嘴
copper dross converter
natural gas combustion
numerical simulation
burners
