锥形溢流管旋流器分离性能研究  

Study on separation performance of a hydrocyclone with conical overflow pipe

作　　者：刘培坤[1] 姜兰越 杨兴华[1] 张悦刊[1] 徐庆芝[1] 

机构地区：[1]山东科技大学机械电子工程学院,山东青岛266590

出　　处：《中国矿业》2016年第6期129-132,共4页China Mining Magazine

基　　金：国家自然科学基金项目"基于Y型溢流管结构的疏浚旋流器分离机理研究"资助(编号:21276145);山东省科技发展计划项目"全重选法赤泥选铁关键技术及设备研究"资助(编号:2014GGB019G3);山东科技大学人才引进科研启动基金项目"疏浚底泥重金属旋流分选机理与数值模拟研究"资助(编号:2015RCJJ030)

摘　　要：针对旋流器运行过程中易产生短路流导致溢流跑粗的问题,提出一种锥形溢流管旋流器,并进行了数值模拟和试验研究。模拟结果表明,锥形溢流管对短路流具有导向作用,使其远离溢流口并直接进入外旋流参与分离过程,从而提高分离效率。试验结果表明,与传统圆柱溢流管相比,锥形溢流管旋流器的底流产率升高,-38μm颗粒的分级质效率从34.23%提高到43.02%,分级量效率从35.17%提高到44.19%。并且随溢流管外壁锥角的减小,溢流浓度降低,底流浓度升高,底流产率增大,-75μm颗粒分级质效率和量效率都有所提高。In order to decrease the coarse particles in the overflow caused by the short circuit flow during the operation of a hydrocyclone,we designed a kind of hydrocyclone with conical overflow pipe,then the numerical simulation and experimental study were carried out.The simulated results show that the conical overflow pipe plays a guiding role for the short circuit flow,which can be deviated from the overflow port and enters the outer swirl to participate in the separation process directly,therefore the separation efficiency can be improved.The experimental results demonstrate that,compared with the cylindrical overflow pipe,the hydrocyclone with conical overflow pipe possesses higher bottom productive rate.The classification efficiency of-38μm particles increases from 34.23%to 43.02% by quality and from 35.17%to 44.19% by quantity.With the decrease of the cone angle of the conical overflow pipe,the overflow concentration decreases,the underflow concentration and the productive rate increase,the classification efficiency of the-75μm particles increases accordingly.

关 键 词：锥形溢流管 短路流 分级 效率 

分 类 号：TD98[矿业工程—选矿]