铜顶吹炉内多相流数值模拟与单因素影响分析

Numerical Simulation and Single Factor Influence Analysis of Multi-phase Flow in Copper Top-blown Furnace

采用VOF模型模拟铜顶吹炉内多相流动,以气含率、熔体平均速度为铜顶吹炉熔炼效果/效率的评价指标,通过单因素分析法研究了喷枪外径、空气流量及浸没深度对熔炼过程的影响,并结合经验生产参数提出了各参数的适宜值.结果表明,适当增大喷枪空气流量或浸没深度可明显提升气含率和熔体平均速度,获得更高的熔炼效率;适当减小喷枪外径可提升评价指标并获得更佳熔炼效果;各参数适宜值为喷枪外径403~428 mm、喷枪空气流量12000~14000 Nm^3/h、喷枪浸没深度225~275 mm.

Based on the volume of fluid model,simulation of the multi-phase flow in a copper top-blown furnace was carried out.Taking the gas volume fraction and the average velocity of the melt as the indexes to assess the smelting effort/efficiency of the copper top-blown furnace,influences of three main parameters on the smelting process which were the lance outer diameter,the lance air flux and the lance submerged depth were investigated by single factor analysis method.Appropriate ranges of three main operational parameters were determined by taking the practical production parameter values into consideration.The results showed the appropriate increase of lance submerged depth or air flux can obviously improve gas volume fraction and average velocity of the melt attaining a higher smelting efficiency.Properly decreasing the lance outer diameter can enlarge the assessment indexes and get a better smelting effect.The appropriate ranges of three main parameters were the lance outer diameter of 403~428 mm,the lance air flux of 12 000~14 000 Nm^3/h and the lance submerged depth of 225~275 mm.