Abstract: To increase the flue gas temperature of outlet and waste heat recovery efficiency in the waste heat recovery area，a simulation study on sinter circular cooler layer-loading is carried out in a 420 m² sinter circular cooler in an iron and steel company.Based on the porous medium model and the standard k-ε turbulence model，the two-equation energy model of non-equilibrium thermodynamics is set up with the user-defined-scalar (UDS)and user-defined-function (UDF)of Fluent.A mathematical model of sinter cooling process is established with the computing platform of Fluent.The optimal parameters were obtained by simulating different conditions of layer-loading and general-loading with the mathematical model.The optimal parameters are as follows：the height，porosity and size of bottom layer are 0.4 m，0.4 and 0.035 m，respectively; the height，porosity and size of middle layer are 0.5 m，0.3 and 0.025 m，respectively; those of top layer are 0.5 m，0.3 and 0.03 m; the gas velocity of inlet is 7.65 m·s^-1，and the gas temperature of inlet is 404 K.The results show that compared with the general-loading，the layer-loading used in the sinter circular cooler can increase the flue gas temperature at outlet by 43.72 K，and increase the waste heat recovery efficiency by 23.2% in waste heat recovery area.

Key words: sinter, sinter circular cooler, layer-loading, simulation, optimization

摘要： 以提高环冷机“余热利用区”出口烟气温度和环冷机的余热回收利用率为目标，对某钢铁企业420 m²环冷机进行了分层布料仿真实验研究。以多孔介质模型为基础，结合Fluent软件的UDF和UDS功能，建立气、固局部非热力学平衡的双能量方程模型，以Fluent软件为计算平台，建立了烧结矿冷却过程求解的数学模型。利用该模型对不同的分层布料工况及常规布料工况进行了模拟计算，得到了最优分层布料参数。研究结果表明，按粒度对环冷机烧结矿实行分层布料可有效提高环冷机“余热利用区”出口烟气温度和环冷机的余热回收利用量，余热回收利用量比常规工况提高了23.2%，出口烟气平均温度比常规工况提高了43.72 K。

关键词: 烧结, 环冷机, 分层布料, 数值模拟, 优化