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Based on computational fluid dynamics (CFD) method, a multiphase VOF model and Realizable k-εturbulence model were used to simulate flow characteristics of a large bottom-blown furnace with different blowing modes, and analyze a pre-stabilization process, motion characteristics of blown gas, gas-matte-slag interaction characteristics and mixing effect in molten pool. The results show that the large bottom-blown furnace has two oxygen lances for blowing, which can altogether generate an enhanced pneumatic agitation zone, resulting in a remarkable gas-matte-slag interaction in the furnace, thus providing good dynamic condition for the large bottom-blown furnace. The furnace with double lances blowing at an angle of 9° can bring a better agitation effect, leading to the gas content at a rate of 2.70%, average speed of 0.20 m/s and average turbulence energy of 0.059 m²/s² in the molten pool. There is severe internal disturbance and less splashing of melt in the molten pool, which is beneficial to improving smelting efficiency.

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基于计算流体力学方法，采用VOF多相流模型和Realizable k-ε湍流模型，对不同喷吹方式的大型底吹炉流动特性进行模拟，分析了预稳过程、喷吹气体运动特征、气-锍-渣相互作用特征以及熔池混合效果。结果表明，大型底吹炉的双枪喷吹由枪座上的两支氧枪共同形成一个叠加的气动搅拌区，其内部存在显著的气-锍-渣相互作用，为大型底吹炉提供良好动力学条件。9°双枪喷吹混合效果较佳，熔池气含率达到2.70%，平均速度为0.20 m/s，平均湍动能为0.059 m²/s²，熔池内部扰动剧烈并且熔体喷溅较少，有利于提高熔炼效率。

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姜保成（1995—），男，云南玉溪人，博士研究生，主要从事有色金属冶金数值模拟与过程强化研究。

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姜保成（1995—），男，云南玉溪人，博士研究生，主要从事有色金属冶金数值模拟与过程强化研究。

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