气升式环流反应器内气泡分布的数值模拟  

NUMERICAL SIMULATION OF BUBBLE PATH DISPERSION IN AN AIRLIFT LOOP REACTOR

作　　者：宋涛[1,2,3] 蒋开喜[2] 周俊武[2,3] 冯昱清 

机构地区：[1]东北大学材料与冶金学院,沈阳110819 [2]北京矿冶研究总院,北京100160 [3]矿冶过程自动控制技术北京市重点实验室,北京102628 [4]CSIRO Mineral Resource Flagship

出　　处：《矿冶》2015年第1期61-66,共6页Mining And Metallurgy

基　　金：国家高技术研究发展计划(863计划)项目(2012AA061503)

摘　　要：气升式环流反应器广泛应用于湿法冶金工业,如金矿的氰化浸出、铀矿浸出、铜矿浸出以及难处理矿物的生物预氧化等。该类反应器几何结构虽然简单,但合理的设计仍是设备高效运行的保证。为了预测气升式环流反应器的工作效果,使用欧拉双流体模型模拟反应器内包含气泡的气液两相流,并通过不同的相间力模型及自定义湍流子模型描述槽内气泡复杂运动。分析了气泡诱导湍流、升力、湍流分散力等模型在模拟气泡分布时的作用,并将模拟结果与Sokolichin等的试验结果进行比较。结果表明,提出的模拟方法在气升式环流反应器模拟中能够得到准确的流场和气泡分布结果。Airlift loop reactors are widely used in the hydrometallurgical industry, including cyanide leaching of gold, uranium leaching, the bacterial oxidation of pyrite and copper leaching. Although the geometry of airlift loop reactors are usually simple, the reasonable design is still needed. To predict the performance of this kind of reactors, the Eulerian-Eulerian two-fluid method was used for modeling gas-liquid flow driven by bubbles, and extra user defined subroutines were incorporated to consider the complex physics. Bubble induced turbulence, lift and turbulent dispersion forces were evaluated in the numerical simulations of the bubble path dispersion in airlift loop reactors. The simulation results have been compared with the experimental measurements of Sokolichin et al. Some reasonable agreements have been obtained both in flow structures and bubble distribution.

关 键 词：气升式环流反应器 气泡流 气液两相流 数值模拟 

分 类 号：TF351.53[冶金工程—冶金机械及自动化]