自吸气离心浮选机锥体角度对槽内流场影响的数值研究

Numerical Study of Flow Field with Changing Taper Angle of Flotation Cell in Air-breathing Centrifugal Flotation Machine

锥体角度对离心浮选机内部流场具有重要的影响,选定3种锥体角度,利用CFD软件Star CCM+分别对离心浮选机浮选槽内流场进行数值模拟研究。流场计算时,以水为流体介质,并选用非稳态、标准κ-ε湍流模型。计算结果表明:进料管为单排,下筒体锥角为120°时,外筒体所受的压力最大,沿浮选槽内壁的切向速度也最大。模拟结果为有效利用浮选空间,提高浮选效率,优化浮选结构提供依据。

It will be effect flow filed in centrifugal flotation machine when changing the taper angle of flotation cell. Three kinds taper angle are choosen, use computational fluid dynamics software Star CCM＋ for numerical simulation of flow filed in flotation cell. Change structure parameters of flotation cell, separately by numerical simulation. The feed flow into flotation cell is water, choose unsteady, standard κ-ε turbulence model for calculation. Results show that： If feeding pipes in one row, and the cone angle of lower shell is 120°, pressure on outer barrel is maximum, tangential velocity along in wall of flotation cell also maximum. Conclusion results can provide basis for using of space effectively, increasing flotation efficiency, optimizing flotation structure.