中低品位磷矿流态化冷模实验研究  

Experimental study on cold model of fluidized middle and low grade phosphate rocks

作　　者：桂坤[1] 戢峻[1,2] 田琦峰[1] 徐尧[1] 胡彪[1] 吴元欣[1,2] 池汝安[1] 

机构地区：[1]武汉工程大学绿色化工过程教育部重点实验室,湖北武汉430073 [2]天津大学化工学院,天津300072

出　　处：《化工矿物与加工》2013年第4期3-5,24,共4页Industrial Minerals & Processing

基　　金：教育部"矿物处理过程强化"创新团队资助项目(IRT0974);研究生创新基金CX201205

摘　　要：在自制冷模实验装置中,选取粒径为54～200μm,密度为2253～2265kg/m3的磷矿颗粒在床层高径比分别为0.75、1.25、1.75和2.25的条件下进行了流态化特性实验研究。实验结果表明:床层高径比对磷矿颗粒的流化行为有较大影响,床层膨胀比随着床层高径比的增大而逐渐减小。床层塌落实验表明,当床层高径比为1.75时,磷矿颗粒流化效果最佳。用降压法得到了磷矿颗粒的临界流化速度,将实验结果与Ergun方程式进行了关联,得出了磷矿颗粒基于Ergun方程的临界流化速度关联式。In the self-made experimental device for cold model, experimental study was made on the fluidization characteristics of phosphate rocks with particle size of 54 - 200 μm and particle density of 2253-2265 kg/m^3 under tile conditions of bed height- diameter ratio of 0.75, 1.25, 1.75 and 2.25. Experimental re- suits show that the bed height-diameter fluidization have great in- fluence on the behavior of phosphate rock particles and the bed expansion ratio decreases gradually with increasing bed aspect ra- tio. The bed to collapse experiments show that when the bed height-diameter ratio is 1. 75, the phosphate particles have the best fluidization effect. The phosphate critical fluidization velocity was obtained using the traditional depressurization method and a new equation of critical fluidization velocity of phosphate rock particles was developed based on Ergun equation by the associa- ting the experimental results with Ergun equation. Keywords. fluidized bed; phosphate rock; height to diameter ratio, minimum fluidization velocity; bed collapse

关 键 词：磷矿 磷酸 流化床 床层高径比 临界流化速度 床层塌落 

分 类 号：TQ026.7[化学工程]