单槽容积60m^3煤用大型圆筒形浮选机关键部件及区域流场分析  

Analysis of the flow fields produced by and in the regions around the key components of a large-sized cylindrical coal flotation machine with a cell volume of 60 m^3

作　　者：刘春艳 

机构地区：[1]天地(唐山)矿业科技有限公司,河北唐山063012 [2]河北省煤炭洗选工程技术研究中心,河北唐山063012

出　　处：《选煤技术》2016年第6期4-9,共6页Coal Preparation Technology

基　　金：河北省重大科技成果转化专项项目(16044104Z)

摘　　要：运用CFD软件模拟分析了XJM-S型机械搅拌式60 m^3圆筒形浮选槽初始虚拟样机关键部件及区域的流场特性。研究表明:浮选机叶轮的吸浆能力强,实现了高矿浆处理能力;叶轮腔内流体压力分布具有对称性,但缺乏均衡性;定子叶片上边缘1/3处的叶片内侧存在高压磨损现象;初始设计时,稳流板叶片高度偏小,叶片后部削切不合理,对矿浆的稳流效果不理想;叶轮叶片、定子及稳流板叶片数目不对应,关键部件及区域的流场具有对称性,但缺少均衡性。根据仿真结果分析,提出了定子及稳流板叶片数目改为18片,对定子、稳流板等关键部件优化设计的建议。Simulation analysis is made in the paper of the characteristic of the flow fields produced by and in the regions around the key components of the virtual prototype XIM-S mechanically-agitated cylindrical coal flotation machine using CFD software. Analysis shows that： the impeller works with a high pulp throughput for its high pulp suction capacity; the distribution of fluid pressure in impeller cavity is in a symmetrical but not totally balanced state; the inner side of each stator blade is found to be subjected to abrasive wear under the effect of high pressure at the point about 1/3 from the blade＇s top edge; the blades of the stabilizer preliminary designed are insufficiently large in height and the cutting at the back of the blades is not made in a mechanically rational manner, resulting in, therefore, an unsatisfactory flow stabilizing result; the blades of the impeller, stator and stabilizer are not corresponding with each other in number; and the flow fields of key components and in the region around then are symmetrical yet unbalanced. According to the simulation result, it is proposed to change number of the blades of stator and stabilizer all to 18 and make corresponding optimum design of these key components.

关 键 词：机械搅拌式浮选机 叶轮 定子 稳流板 流场特性 优化设计 

分 类 号：TD943[矿业工程—选矿]