柱浮选优化充填的动力学分析  

Dynamic Analysis of Optimization Packing in Column Flotation Separation Zone

作　　者：张敏[1] 刘炯天[2] 王永田[2] 翟爱峰[2] 张海军[2] 曹亦俊[2] 

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广东广州510640 [2]中国矿业大学化工学院,江苏徐州221116

出　　处：《中国矿业大学学报》2008年第3期343-346,共4页Journal of China University of Mining & Technology

基　　金：国家杰出青年科学基金项目(50425414);制浆造纸工程国家重点实验室开放基金项目(200727)

摘　　要：充填是提高浮选柱分选效率和降低浮选柱高度的有效途径之一.以筛板充填为基础,对旋流-静态微泡浮选柱浮选段进行充填方式优化,提出了筛板充填和蜂窝管充填的高效混合充填模式.基于气泡-矿粒碰撞概率理论分析了蜂窝管充填的优越性,并推导出气泡与矿粒碰撞概率的动力学方程.应用轴向扩散模型分析混合充填在保证回收率中的作用,导出了捕集区轴向无量纲扩散模型.混合充填使浮选柱下部保持矿浆高紊流的同时,上部浮选段形成"静态化"环境.The Packing in column flotation is one of the effective approaches, which can improves separation efficiency and reduce separation height. Based on sieve plates packing, a high-efficiency-mixed-packing mode which consisted of sieve plates packing and honeycomb tubes packing was proposed by optimizing packing modes in the separation zone of cyclonic static micro-bubble column flotation. The advantage of honeycomb tubes packing was analyzed by means of the bubble-particle collision probability theory, and the dynamic equation of collision probability were derived. The role of mixed packing for keeping recovery was analyzed by axial dispersion model and the dimensionless axial dispersion model was derived. When the high turbulence current was formed in the upper, and the maintained in the bottom, a static separation environment is slug flow flotation is realized.

关 键 词：浮选柱 充填 分选 动力学 

分 类 号：TD922[矿业工程—选矿]