天然气铝熔炼炉内料堆熔化过程数值模拟与堆料高度优化研究  

Numerical simulation of melting process and optimization of stacking height in natural gas aluminum melting furnace

作　　者：闫红杰[1] 谢环宇 吴克[1] 伍东玲[1] 刘柳[1] YAN Hongjie;XIE Huanyu;WU Ke;WU Dongling;LIU Liu(School of Energy Science and Engineering,Central South University,Changsha 410083,China)

机构地区：[1]中南大学能源科学与工程学院,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2024年第6期2084-2091,共8页Journal of Central South University:Science and Technology

基　　金：湖南省科技人才托举工程项目(2023TJ-N10)。

摘　　要：以天然气铝熔炼炉中铝料的熔化过程为研究对象,通过VOF模型捕捉气液界面,采用EnthalpyPorosity模型描述固液相变过程,对二维截面铝料熔化的非稳态过程进行数值模拟,研究铝料在熔化过程中的流动与传热行为,并对堆料方式单因素的影响进行分析。研究结果表明:在熔炼过程的前中期,熔化后的铝液累积在熔池烟气入口侧,导致已熔融铝液凝固;在铝料高度分别为2.94、2.64、2.34和2.04 m时,熔化速率随时间均呈现先减小后增大的规律;当料堆高度为2.64 m时,熔化时间最短,为3199 s,铝料平均温度最低,比基准工况下的平均温度低50 K,可以有效防止上层铝液过热,减少氧化造成的铸损。Taking the melting process of aluminum in a natural gas aluminum melting furnace as subject,the VOF model was used to capture the gas-liquid interface,and the Enthalpy-Porosity model was employed to describe the solid-liquid phase transition process.Numerical simulations were conducted to study the non-steady-state melting process of aluminum in a two-dimensional cross-section.The flow and heat transfer behaviors of aluminum during the melting process and a single-factor analysis of the stacking mode were investigated.The results show that during the early to middle stages of the melting process,the molten aluminum accumulates on the side of the furnace gas inlet,leading to the solidification of the molten aluminum.When the aluminum pile height is 2.94,2.64,2.34,2.04 m,the melting rates decrease first and then increase with time.When the pile height is 2.64 m,the shortest melting time is 3199 s,and the average temperature of the aluminum is the lowest,which is 50 K lower than that of the basic condition.The results can effectively prevent overheating of the upper layer of aluminum and reduce casting losses caused by oxidation.

关 键 词：天然气铝熔炼炉 数值模拟 熔化 堆料方式 

分 类 号：TK175[动力工程及工程热物理—热能工程]