摘要
研究了转炉放散炉气在竖炉中预热废钢的传热规律,建立了废钢多孔介质中的瞬态非热平衡流固耦合模型;通过FLUENT模拟得出废钢传热特性曲线和废钢料层内部的温度分布,分析了废钢预热中料层高度、转炉放散炉气温度和进气速度对废钢温度及预热效率的影响.研究结果表明:在1200℃炉气中,废钢经30 min预热后温度达到570.3℃,预热效率为38.3%;随着废钢料层高度从2.5 m降低到0.7 m,废钢温度从570.3℃升高到695.7℃,预热效率下降为13.3%;随着转炉放散炉气温度从1200℃升高到1600℃,废钢温度从570.3℃升高到734.4℃,预热效率上升为44.2%;随着进气速度从2.375 m/s降低到1.125 m/s,废钢温度从570.3℃下降到356.1℃,预热效率上升为54.5%.
A transient non⁃thermal equilibrium fluid⁃structure coupling model in porous medium of scrap steel was established to study the heat transfer law of converter gas in shaft furnace.The heat transfer characteristic curve of scrap steel and the temperature distribution inside the scrap sheet were obtained by numerical simulation using FLUENT.The influences of the scrap sheet height,the temperature of converter gas and the inlet gas speed on the temperature and preheating efficiency of scrap steel were analyzed.The results show that the temperature of the scrap steel reaches 570.3℃after preheated by the 1200℃converter gas for 30 minutes,and the preheating efficiency is 38.3%.As the scrap sheet height decreases from 2.5 m to 0.7 m,the temperature of the scrap steel increases from 570.3℃to 695.7℃,and the preheating efficiency decreases to 13.3%.As the temperature of the converter gas increases from 1200℃to 1600℃,the temperature of the scrap steel increases from 570.3℃to 734.4℃,and the preheating efficiency increases to 44.2%.With the decrease of the inlet gas speed from 2.375 m/s to 1.125 m/s,the temperature of the scrap steel decreases from 570.3℃to 356.1℃,and the preheating efficiency increases to 54.5%.
作者
张金鹏
宋翰林
程功金
刘建兴
薛向欣
Zhang Jinpeng;Song Hanlin;Cheng Gongjin;Liu jianxing;Xue Xiangxin(School of Metallurgy,Northeastern University,Shenyang 110819,China)
出处
《材料与冶金学报》
CAS
北大核心
2022年第1期43-48,共6页
Journal of Materials and Metallurgy
基金
国家自然科学基金项目(51674084).
关键词
转炉放散炉气
废钢预热
传热模拟
节能减排
converter gas
scrap steel preheating
heat transfer simulation
energy saving and emission reduction
