空气重介质流化床多元加重质流化特性研究

 本论文在综述了流化床干法选煤和加重质研究现状的基础上，采用硼铁矿粉和磁铁矿粉作为空气重介流化床的多元加重质，进行了相应的试验研究。选择了-0.3+0.15mm、-0.15+0.125mm和-0.125+0.074mm三个粒级的硼铁矿粉，分别与-0.074+0.045mm磁铁矿粉以不同总量配比组成两元加重质，进行流化特性的考察研究。建立了多元加重质流化床的起始流化速度与平均粒度之间的回归模型和密度模型。

Study on Multi Element and Heavy Medium Fluidized Features of Air and Heavy Medium Fluidized Bed

Base on summarizing the application situation of dry coal beneficiation with fluidized bed and present situation of the mediums, this paper mainly studied the fluidization and beneficiation of the Air-dense medium fluidized bed by using paigeite powder and magnetite powder as multivariate-medium-solids. This paper chose -0.3+0.15mm、-0.15+0.125mm and -0.125+0.074mm paigeite powder to be respectively mixed in certain ratio with -0.074+0.045mm magnetite powder ,and analyzed their fluidization characteristics. Research contents of this dissertation mainly involve fluidization properties of setting up the regression model of incipient fluidization velocities and average granularity，and the model of fluidized bed density.