流化床内介质主要流化特性参数的研究

利用6种不同粒度的磁铁矿粉作为加重质研究流化床的流化特性。研究表明,随着颗粒平均粒径的减小,床层表面的气泡尺寸明显减小,适宜分选的气速可调范围变宽,有利于流化床分选的进行,为确定最佳的分选条件提供了依据。 This article takes magnetite as dense medium with six different particle size distribution and study several main parameters of fluidization characteristics. Its results show that the dimension of air –bubble was decreased in the surface of fluidized bed with the decreasing particle. The range of the proper gas velocity of separation becomes wide,it suits the separation of fluidized bed and determined the optimum condition of the separation at the same time