摘要：利用旋转法对空气重介质流化床的床层黏度进行研究,分析影响流化床床层黏度的因素,建立床层黏度与影响因素的数学模型。结果表明:流化床床层黏度随着加重质磁铁矿粉平均粒度的增大而增大,随着流化气速的增大而减小,随着床层高度及重介质水分含量的增大而增大;当煤粉质量分数大于12%时,床层黏度明显增大,煤粉质量分数为17%时,气-固两相流的流动性变差。

关键词：空气重介质流化床；床层黏度；磁铁矿粉

Abstract： The viscosity of air dense medium fluidized bed was measured by the method of rotation. The factors influencing the viscosity of fluidized bed were analyzed. The mathematical model between those factors and the viscosity was proposed. The results indicate that the bed viscosity increases with an increase in mean particle size, decreases with an increase in gas velocity, and increases with the increase of bed height and moisture content. When the mass fraction of coal powders is larger than 12%, the bed viscosity significantly increases. When the mass fraction of coal powders is 17%, the bed fluidization becomes poor. 

Keywords: air dense medium fluidized bed; viscosity of fluidized bed; magnetite powder