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OA北大核心CSTPCD

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 3 199 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.