侧吹熔池熔炼气液混合特征的数值模拟研究

Numerical Simulation Research of the Gas-liquid Mixed Characteristics of Side-blown Bath

为阐明侧吹气液两相流的流动特性,提高熔池反应区熔炼效率及炉体寿命。首先采用VOF多相流模型模拟气液两相流动过程;其次在水模型试验验证模拟结果基础上,分析多水平因子条件下气体射流对熔体流动过程的影响;最后以此为依据提出侧吹熔池风口排布及喷吹优化方案。结果表明:在速度300 m/s,风口高度为0.9 m喷吹对熔池的搅拌效率更高,熔池内的速度场分布更为合理;双侧喷吹获得更好的动力学条件,但熔池表面喷溅较为严重;风口附近的湍流造成射流回击,带动熔体冲击炉衬。

In order to clarify the characteristics of the gas-liquid two phase flow,and improve the melting efficiency and furnace life in reaction area of bath,firstly,the gas-liquid two phase flow process is simulated by using VOF multiphase flow model.Secondly,based on the simulation results of water model experiments,the influence of gas jet on the melt flow process under multi-level factors is analyzed.Finally,based on this,the paper puts forward the tuyere arrangement of side-blown bath and the optimized scheme of spray blow.The results show that,at a speed of 300 m/s,the air tuyere height is 0.9 m and the mixing efficiency of the molten pool is higher,the velocity distribution in bath is more reasonable.Better dynamic conditions are obtained by bilateral spray,but serious spillage is found on the surface of bath.Turbulence near the tuyere can cause the jet back,drive the melt to impact the brasque.