基于Fluent软件，耦合Realizable k?ε湍流模型和VOF多相流模型对液态高铅渣还原炉内气液两相流动过程进行数值模拟。依据相似原理建立了水模型实验，得到气泡/气团频率、气泡直径和喷枪直径比值的实验结果，其结果和数值计算结果吻合较好，验证数值计算模型的有效性。运用该耦合模型研究熔池深度、喷枪直径、喷枪倾角和喷枪间距等因素对还原炉的影响。再通过正交实验和矩阵分析方法，综合考虑熔池气含率、熔体平均流速和熔体湍动能等指标，得到还原炉最优工况为喷枪角度为10°，熔池深度为800 mm，喷枪直径为60 mm，间距为950 mm。
Based on Fluent software, the gas-liquid two-phase flow in reduction furnace was simulated by Realizablek?ε Turbulent model coupling with VOF multiphase model. The experiments on the bubble frequency and the ratio of the bubble diameter and the lance diameter were carried out in a water model based on the similarity principle, and the results were compared with the numerical results and the feasibility of the model was verified. The influences of some parameters, such as the pool depth, the lance diameter, the lance inclination and the lance spacing, were studied on reduction furnace. Using the orthogonal experimental design and matrix analytic method and overall considering the gas holdup, mean velocity and turbulent kinetic energy of the melt optimum indexes, the optimal operation condition can be achieved with the lance inclination angle of 10°, the pool depth of 800 mm, the lance diameter of 60 mm and the lance spacing of 950 mm.
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