基于数值示踪试验的浮选柱停留时间分布模型分析  

Analysis of Residence Time Distribution Model of Flotation Column Based on Numerical Tracer Experiment

作　　者：李凌凌[1] 张明[2] 

机构地区：[1]铁岭师范高等专科学校,辽宁铁岭112000 [2]北京矿冶研究总院,北京100160

出　　处：《有色金属（选矿部分）》2015年第6期78-82,92,共6页Nonferrous Metals（Mineral Processing Section）

摘　　要：浮选柱是实现泡沫浮选的核心技术装备。由于对细粒矿物优异的分选性能和较低的能耗,使得浮选柱得到了广泛应用。因此,研究揭示浮选柱内流动特性具有重要意义。轴向扩散模型和多槽串联模型是常用的反应器理论分析模型。本文应用轴向扩散模型和多槽串联模型分析了浮选柱流动特性,特别是物料的停留时间分布。采用计算流体力学方法研究了实验室浮选柱内示踪物的浓度变化。基于数值示踪试验,确定了轴向扩散模型和多槽串联模型的特征参数Pe和N。应用轴向扩散模型和多槽串联模型理论预测的浮选柱停留时间分布同试验结果吻合。Flotation column is a key equipment in flotation. Flotation column is widely applied in the world because it is low power consumption and has an advantage in fine particles separation. Therefore, it is meaningful to study the flow characteristics of flotation column. The axial dispersion model and the tank in cells model are universal theory models which are used to study reactors. In the paper, the flow patterns of flotation column are investigated with the axial dispersion model and the tank in cells model, especially the residence time distribution of flotation column. The variation of tracer density in the laboratory scale flotation column is studied by CFD simulation. Based on numerical tracer experiments, the characteristics parameters such as P, in the axial dispersion model and N in the tank in ceils model were obtained. The predicted residence time distribution by the axial dispersion model and the tank in cells model have good agreement in numerical experiment results.

关 键 词：轴向扩散模型 多槽串联模型 CFD 浮选柱 停留时间分布 

分 类 号：TD456[矿业工程—矿山机电]