摘要:
以某公司研发的氧煤燃烧熔分炉为研究对象,基于VOF多相流模型和Realizable k-ε模型对熔分炉熔池区域气液两相流进行数值模拟计算。对标准工况下不同氧枪浸入深度、氧枪直径和氧枪倾斜角度对熔分炉熔炼性能的影响进行单因素变量、矩阵分析以及权重计算并最终达到优化熔池熔炼性能的目标,其中选取熔池平均速度、熔池平均湍动能和熔体气含率作为熔池区域熔炼性能的判断依据。根据试验结果并计算得出氧枪最优结构参数为:氧枪浸入深度70 mm、氧枪直径22 mm、氧枪倾斜角度22°,且各参数对熔分炉熔炼性能影响程度大小为:氧枪直径>氧枪倾斜角度>氧枪浸入深度。优化后的熔分炉工况平均搅拌速度提高9.13%,熔池平均湍动能提高7.43%,熔池气含率提高了8.32%。
Abstract:
In this paper,the oxy-combustion melting furnace developed by a company had been taken as the research object.Based on the VOF multi-phase flow model and the Realizable k-ε model,the gas-liquid two-phase flow in the molten pool area of the melting furnace had been numerically simulated.Under the standard conditions,the effects of different oxygen immersion depth,oxygen gun diameter and oxygen gun tilt angle on the melting performance of the melting furnace had been investigated by means of single factor variables,matrix analysis and weight calculation,in order to achieve the goal of optimizing the molten pool smelting performance.The average velocity of the molten pool,the average turbulent kinetic energy of the molten pool and the melt gas content are selected as the relevant indexes for judging the melting performance of the molten pool area.According to the experimental results,the optimal structural parameters of the oxygen lance are as follows:oxygen immersion depth 70 mm,oxygen gun diameter 22 mm,oxygen gun tilt angle 22°.The influence degree of each parameter on the smelting performance of the melting furnace is in following order:oxygen lance diameter ＞ Oxygen gun tilt angle ＞ Oxygen gun immersion depth.After optimizing melting furnace condition the average stirring speed is increased by 9.13%,the average turbulent energy of the molten pool is increased by 7.43%,and the molten pool gas content is increased by 8.32%.
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