摘要
叶轮和定子是影响浮选机分选性能的最核心部件。运用CFD方法揭示了KYF浮选机叶轮-定子区的局部流场特征。叶轮叶片间出现了螺旋上升的涡流,而叶轮盘起到了稳流作用,流体平滑地从叶根高速流出。叶轮叶片的迎浆面边缘出现静压峰值,而叶轮盘叶根出口处次之,并解释了叶根出口处磨损严重的原因。分析了功耗、搅拌雷诺数、循环量和叶轮设计等关键设计参数间的影响规律。研究表明,在相同条件下,后倾叶轮的循环量明显大于前倾叶轮,而功耗却更低。
The impeller and stator are the most significant components that can influence separation effect of flotation machine. The local flow field characteristics of impeller-stator region in KYF flotation machine were revealed with CFD simulation. A vortex which was a upward spiral eddy appeared between impeller blades. The impeller disk played a role of stabilizing flow. And the fluid smoothly flowed out from blade roots with high velocity. The static pressure peak appeared at the edges of slurry-ward blades, and the exiting of blade roots in impeller disk with sub-value. The reason why the exits of blade roots most seriously wear was explained. The effect laws of key design parameters in flotation machine have been analyzed in this paper such as power consumption, mixing Reynolds number, circulation volume, the impeller design and so on. It was demonstrated that the circulation volume of backward impeller was obviously larger than the forward impeller in the same condition, and lower in power consumption.
出处
《有色金属（选矿部分）》
CAS
北大核心
2013年第3期54-59,共6页
Nonferrous Metals（Mineral Processing Section）
基金
国家自然科学基金面上项目资助(51074027)
关键词
CFD模拟
叶轮-定子区
浮选机
流场
CFD simulation
impeller-stator region
flotation machine
flow field
