宽粒级煤泥浮选机流体动力学模拟与试验研究  

Study on Fluid Dynamics Simulation and Experiment of Wide Particle Grade Slime Floatator

作　　者：杨润全[1] 王怀法[1] 

机构地区：[1]太原理工大学矿业工程学院,山西太原030024

出　　处：《煤炭科学技术》2012年第11期120-124,128,共6页Coal Science and Technology

基　　金：山西省科技攻关资助项目(20080321066);山西省科技创新计划资助项目(2010102010)

摘　　要：针对常规浮选中粗颗粒与气泡碰撞概率低,且与气泡粘附后也会因矿浆的强烈湍流运动而极易从气泡上脱落的问题,结合粗、细粒矿物浮选特点,设计了一种适合于粗、细粒矿物分选的宽粒级煤泥浮选机。采用FLUENT软件对该浮选机进行了气-液两相流场数值模拟研究,通过对浮选机内流体速度、湍流强度和气相浓度的分析,验证了该结构浮选机可为粗粒和细粒矿物浮选提供各自所需的流体力学环境。采用组建的实验室宽粒级煤泥浮选试验系统对章村矿选煤厂0～1 mm煤泥进行了浮选试验。结果表明,通过选择合适的浮选工艺条件,采用该浮选机对0～1 mm宽粒级煤泥浮选时,浮选精煤数量指数和可燃体回收率分别为96.33%和92.07%。Due to the coarse particles were heavy and had a low probability to the bubble collision in the conventional floatation, once sticking on the bubbles, the particles would be easily detached from the bubbles by the strong turbulence movement of slurry. In combina- tion with the floatation features of the coarse and fine particle minerals, a wide particle grade coal floatator suitable for coarse and fine min- erals separation was designed. The FLUENT software was applied to the numerical simulation study on the gas-fluid two phase flow filed of the floatator. With the analysis on the inner fluid velocity, turbulence intensity and gas-phase concentration of the floatator, the structure floatator was approved to provide each fluid dynamics environment required for the coarse and fine coal floatation. A wide particle grade slime floatation experiment system set in the lab was applied to the floatation experiment on the slime with 0- 1 mm in Zhangcun Mine Coal Preparation Plant. The results showed that with a suitable floatation technique condition selected, when the floatator was applied to the floatation of the 0- 1 mm wide grade slime, the quantity index of the floated clean coal and the combustible mass recovery rate were 96. 33% and 92. 07% individually.

关 键 词：煤泥 浮选 宽粒级 流体动力学 气液两相流 

分 类 号：TD94[矿业工程—选矿]