烧结混合料干燥过程的解析研究

Analysis of Sinter Mixture's Drying process

建立了烧结混合料的一维错流干燥解析模型,并通过穿流干燥实验进行了验证,在此基础上,分析了烧结混合料干燥过程的规律以及主要影响因素。研究结果表明:烧结混合料的干燥过程由较短的恒速干燥段和较长的降速干燥段组成,且降速干燥段的干燥速率近似为直线;热风温度和风速对烧结混合料干燥过程的影响明显大于孔隙率和颗粒平均直径的影响;热风温度控制在200～250℃之间,风速控制在1.5m/s左右利于烧结混合料获得适宜的含水率。

A one-dimensional and cross flow analytical model for sinter mixture was established,and then the model was verified correctly by tunnel drier experiment.Based on these,the law and influence factors of sinter mixture during drying process were analyzed.The results show that the drying process of the sinter mixture consists of two stages,namely,a short long constant-rate stage,and a long falling-rate stage,furthermore,the drying rate in falling-rate stage is almost linear.The effect of temperature and the flow rate of the hot air to drying process are better than that of porosity and average diameter particles obviously.It is beneficial to appropriate moisture content when temperature and the flow rate of the hot air were 200～250 ℃ and 1.5 m/s,respectively.