RH脱氧过程Al块运动及其熔化

Motion and melting of AL block during the RH deoxidation process

为了研究将Al块输运至钢渣界面以抑制浇注过程炉渣向钢液传氧的可行性,建立了Al块运动及其传热的数学模型,将Al块运动与其传热进行耦合求解,据此模型分析了RH循环流量和Al块初始半径对Al块运动及熔化的影响.结果表明Al块的熔化有两种路线,两种熔化路线的差异是由Al块的内部熔化引起的.根据分析结果,欲将Al输送至钢渣界面,必须保证RH的循环流量在100 t·min^(-1)以上,Al块的原始半径需大于10 mm.

To investigate the feasibility of the transport of aluminum block to the slag-steel interface to suppress the oxygen trans-fer from slag to steel in the casting process, a mathematical model for the motion and melting of aluminum block was developed and it was solved in a coupled way. The effects of parameters such as the RH circulation flow rate and the initial size of aluminum block on the motion and melting of aluminum block were investigated based on this model. The results suggest that there are two melting routes for aluminum block. The difference between them lies on the internal melting of aluminum block. According to the results, for the sake of transporting the aluminum block to the slag-steel interface, the circulation flow rate should be larger than 100 t·min-1 and the origi-nal radius of aluminum block should be at least 10 mm.