在对回转窑传热过程进行分析的基础上,以某氧化铝厂4.5×90m的回转窑作为研究对象,建立了关于窑横截面筒体非稳态传热过程的二维数学模型,然后对窑筒体温度沿径向的分布和窑壁内表面温度随时间的变化情况进行了数值模拟计算。模拟计算结果表明,当回转窑操作正常时,窑筒体外表面的散热损失基本不变。若将窑筒体的蓄热、放热周期过程作为整体考虑,则回转窑内的换热过程可以简化为稳态换热,窑筒体径向温度可视为线性分布。 Based on the analysis of the heat transfer process in rotary kiln, a two-dimensional mathematical model about the unsteady heat transfer process of the kiln cross-section cylinder was established by taking a rotary kiln of 4.5 × 90m in an alumina plant as the research object. Then, The radial distribution of kiln cylinder temperature and the change of temperature on the inner surface of kiln wall with time were calculated by numerical simulation. The simulation results show that when the rotary kiln is operating normally, the heat loss on the outer surface of the kiln cylinder basically remains unchanged. If the kiln cylinder heat storage, exothermic cycle process as a whole to consider, the rotary kiln heat transfer process can be simplified as a steady state heat transfer, kiln radial temperature can be regarded as a linear distribution.