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循环流量是判断RH真空脱气装置精炼效率的重要指标之一。本文针对某钢厂180t RH真空精炼装置,基于计算流体动力学(CFD)方法,建立了RH真空精炼过程中气泡驱动的气-液两相流动理论模型,并利用CFD商业软件FLUENT进行数值模拟,探讨了相同真空度下吹氩喷嘴分布形式、喷嘴排间距等参数对循环流量的影响。结果表明:相同真空度和吹氩流量条件下,相比于单排圆周均布形式,喷嘴双排圆周交错分布时的循环流量更大、精炼效率更高,并存在最优的排间距,可作为RH真空精炼操作参数优化及工程结构改进的参考。
Circulating flow is one of the important indexes to judge the refining efficiency of RH vacuum degassing device. Based on computational fluid dynamics (CFD) method, a theoretical model of bubble-driven gas-liquid two-phase flow in RH vacuum refining process was established for a 180t RH vacuum refining plant in a steel mill. The CFD commercial software FLUENT was used for numerical simulation. The influence of parameters such as distribution form of argon blowing nozzle and nozzle row spacing on circulating flow under the same degree of vacuum was discussed. The results show that under the same degree of vacuum and argon flow, compared with the single-row circular uniform distribution, the circular flow distribution and the refining efficiency are higher when the double-row circular distribution of the nozzles is staggered, As RH vacuum refining operating parameters and engineering structure improvement reference.