摘要
为了探究铅锌冶炼工艺中烧结点火炉内点火过程的多物理场分布规律,本文以某企业带式点火炉为研究对象,构建了炉内天然气流动、燃烧与传热过程的数学物理模型,并考虑了铅锌矿料化学反应热以及料层阻力的影响,对点火炉内的点火过程进行了详细的数值模拟研究,深入分析了炉内速度场、温度场和浓度场的分布规律,评价了点火料层的温度均匀性,并分析了其产生的原因,最终总结了点火炉的优化改造建议。结果表明:点火烧嘴中高速气流相向运动形成撞击面,破坏了炉内流场的稳定性;点火段主要位于两排主烧嘴的下方料面区域;主烧嘴气流受点火烧嘴气流的影响而发生偏转,导致点火段料面存在局部低温区,不利于料层的均匀着火。
To investigate the multi-physical field distribution of the ignition process in the sintering ignition furnace in the lead-zinc smelting process,this paper took a belt-type ignition furnace of an enterprise as the research object,conducted a detailed numerical simulation research of ignition process in the ignition furnace by constructing a mathematical-physical model of the flow,combustion and heat transfer process of natural gas in the furnace,and considering the influence of the chemical reaction heat of lead-zinc mine and the resistance of the mineral layer.The distribution of velocity,temperature and concentration fields in the furnace was analyzed in depth,the temperature uniformity of the ignition mineral layer was evaluated and the causes were analyzed,the optimization and modification suggestions for the furnace were summarized at the end.The results show that high-speed airflows moving in opposite directions from the ignition burner form an impact surface,which destabilizes the stabilization of the flow field in the furnace;the ignition belts are mainly located in the material surface area below the two rows of main burners;the airflow in the main burner is deflected by the influence of the ignition burner,resulting in a local low temperature zone on the material surface of the ignition belt,which is not conducive to the uniform ignition of the material layer.
作者
曾平生
黄正宗
江新辉
刘柳
周萍
吴霞
闫红杰
ZENG Pingsheng;HUANG Zhengzong;JIANG Xinhui;LIU Liu;ZHOU Ping;WU Xia;YAN Hongjie(School of Metallurgy and Environment,Central South University,Changsha 410083,China;Shaoguan Smelter,Zhongjin Lingnan Nonfemet Company Limited,Shaoguan 512024,China;School of Energy Science and Engineering,Central South University,Changsha 410083,China)
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2024年第1期254-267,共14页
The Chinese Journal of Nonferrous Metals
基金
国家重点研发计划资助项目(2022YFC3901601)。
关键词
烧结点火炉
铅锌冶炼
数值模拟
烧嘴
温度分布
sintering ignition furnace
lead-zinc smelting
numerical simulation
burners
temperature distribution
