铜闪速吹炼炉操作参数优化的数值模拟研究

金冠铜业闪速吹炼炉自2013年投产以来,操作参数的持续优化对炉况运行稳定性的大幅提升起到了至关重要的作用。公司前期主要依托生产实践经验对参数进行优化,调控幅度和影响程度缺乏理论数据支持。为此,本文开展了闪速吹炼炉的数值仿真计算,同时,利用正交试验,研究操作参数的影响并寻找闪速吹炼炉最优操作参数。研究表明,工艺风速度越小、工艺风富氧浓度越高以及分散风流量越大,则上升烟道出口烟气中的氧气质量分数越低,反应越充分;与基准工况相比,正交试验得到的最优工况下,上升烟道出口烟气中氧气的质量分数从8.32%减少至6.37%,氧气利用率从88.96%提高至92.67%。

Optimization on Operational Parameters in Copper Flash Converting Furnace by Numerical Simulation

Flash Converting Furnace (FCF) in Jinguan Copper has been put into practice since 2013, continuous optimization of operational parameters has vital influence on improving furnace operating conditions. In the early stage, the parameters were optimized based on experience, and were not supported by theoretical data. For this reason, numerical simulation of copper FCF was carried out, and orthogonal test was used to analyze influence of different operational parameters and find the most suitable parameters for copper FCF. The results show that the lower speed of process air, together with higher oxygen concentration of process air and larger flow rate of distribution air, the lower mass fraction of O2 in flue gas goes down at uptake shaft outlet. Compared to standard working condition, mass fraction of oxygen in flue gas at uptake shaft outlet drops from 8.32% to 6.37%, and utilization rate of oxygen rising from 88.96% to 92.67% is obtained under the optimized case found out through orthogonal test.