流化床反应室内铁矿石的临界流化特性  

Critical Fluidization Characteristics of Iron Ore in Fluidized Bed Reactor

作　　者：李志明[1] 韩跃新[1] 孙永升[1] 唐志东[1] LI Zhi-ming;HAN Yue-xin;SUN Yong-sheng;TANG Zhi-dong(School of Resources&Civil Engineering,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2024年第4期592-599,共8页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(52104251);国家重点研发计划项目(2021YFC2902403)。

摘　　要：U型反应室是悬浮焙烧装备的核心部件,明确其内物料的临界流化特性具有理论与实践意义.为此,自行搭建了冷态试验系统,并以赤铁矿粉、氧化铝粉为原料,研究了松动风量、物料性质对物料临界流化特性的影响规律,并对原有经验公式进行了修正.结果表明:临界流化气速随物料粒度、密度的增加而增加;在松动室床层为固定床的条件下,临界流化气速随松动风量的增大而减小;修正后的过程方程与试验数据吻合较好,可用于反应室内物料流化行为的预测.研究结果利于悬浮磁化焙烧技术实体化,对该技术工业应用具有一定的指导意义.The U‐type reaction chamber is a core component of suspension roasting equipment,the critical fluidization characteristics of materials have both theoretical and practical significance.Therefore,this paper built a cold test system,and conducted research using hematite powder and aluminum oxide powder as materials to study the influence of aeration air volume,material properties on the critical fluidization characteristics,and modified empirical formula of critical fluidization characteristics based on the test.The results show that the critical fluidization gas velocity increases with the increase in particle size and density of materials.The critical fluidization velocity decreases with the increase of the aeration air volume under the condition of a fixed bed in the loosening chamber,the modified formula fits well with the experimental results and can be used to predict fluidization behavior.The research results are helpful to realize the integration of suspension roasting technology and equipment,and also have certain guiding significance for industrial applications.

关 键 词：悬浮磁化焙烧炉 流化床反应室 冷态试验 降速法 临界流化特性 

分 类 号：TD925.7[矿业工程—选矿]