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依据某钢厂使用的推钢式板坯加热炉模型,采用ANSYS CFD软件对其炉内高温气体的流动状态进行分析,得到速度场、温度场、壁面剪切应力等相关分布。通过分布规律分析加热炉炉衬损耗的主要位置和影响因素,指导炉衬耐火材料的选择。结果表明,均热段煤气入口右侧、加热段上端空气入口左侧的回流区会对炉衬表面产生气体冲刷,影响其寿命。在加热段炉顶上方出现高温区,会对炉衬耐火砖产生热应力。建议炉壁剪切应力较大值的地方应选择能抗剪切应力的优良材质砌筑,应尽量避免在Z方向靠近炉壁处设置喷嘴。
Based on the model of pusher furnace for slab steel used in a steel mill, the flow state of hot gas in furnace was analyzed by ANSYS CFD software, and the related distributions of velocity field, temperature field and wall shear stress were obtained. Through the distribution of the furnace lining furnace analysis of the main loss of location and influencing factors to guide the selection of refractory lining. The results show that the gas recirculation on the right side of the gas inlet of the soaking zone and on the left of the upper air inlet of the heating zone will affect the life of the lining. In the heating section of the roof above the high temperature zone, will have a lining firebrick thermal stress. It is recommended that the furnace wall shear stress larger value should be selected to resist shear stress of the material of the masonry, should be avoided in the Z direction near the furnace wall at the nozzle.