湿法提钒搅拌反应釜的流场分布  

Flow field distribution of stirring tank for hydrometallurgical vanadium extraction

作　　者：曹小爽 郑海燕 王琦 沈峰满 Cao Xiaoshuang;Zheng Haiyan;Wang Qi;Shen Fengman(School of Metallurgy,Northeastern University,Shenyang 110819,Liaoning,China)

机构地区：[1]东北大学冶金学院,辽宁沈阳110819

出　　处：《钢铁钒钛》2021年第4期6-11,共6页Iron Steel Vanadium Titanium

基　　金：国家自然科学基金资助(52074072,51974073,51774071)。

摘　　要：为提高湿法提钒浸出率、掌握机械搅拌反应釜内液相流动和固相分布的规律,使用Fluent软件,基于计算流体力学理论,利用多重参考系法对浸钒搅拌釜内计算区域进行处理,建立多相流欧拉-欧拉模型和标准k-ε湍流模型,研究了搅拌速度v、桨叶离底高度L和带孔挡板对搅拌釜内流场分布的影响。结果表明:随着搅拌速度v的增大,搅拌釜内液相速度先逐渐增大,然后基本保持不变;根据桨叶离底高度L高低对搅拌釜内液相速度分布的影响,将最适宜离底高度选作L=0.4D_(1);安装带孔挡板有助于消除流场的漩涡现象,改善流场分布。In order to improve the leaching rate of vanadium and understand the liquid flow and solid distribution in the mechanical stirring tank for hydrometallurgical vanadium extraction,the software Fluent was used to establish the Euler-Euler model of multi-phase flow and the standard k-εturbulence model,by dealing with the calculation area in the stirring tank via multi-reference system method based on the theory of computational fluid dynamics.The influences of stirring speed v,the height of blade from the bottom L and the perforated baffle on the flow field distribution in the stirring tank were investigated.The results show that the liquid phase velocity in the stirring tank gradually increases first and then basically stabilizes with the increase of stirring velocity v.Based on the influence of the height of the blade from the bottom L on the liquid velocity distribution,the most suitable value was determined at L=0.4 D_(1),where D_(1)refers to the blade diameter.The perforated baffle is helpful to eliminate the vortex in the flow field and improve the flow field distribution.

关 键 词：湿法提钒 搅拌反应釜 流场 计算流体力学 固液混合 带孔挡板 

分 类 号：TF841.3[冶金工程—有色金属冶金]