自制铝土矿脱硅水力分选设备的流场模拟及实验研究

采用Fluent6.3软件对自制水力分选设备的流场进行模拟.模拟结果表明:设备锥体内流体的旋转运动使矿浆在径向分散和分离,向上运动的流体能促使固相尤其是粒度较小和密度较低的含硅相向上运动,实现铝相和硅相在轴向上的分离；斜板能显著提高铝相在上升过程中的沉降效率.在自制设备上进行的实际矿石脱硅试验结果表明:当原矿铝硅比（质量比）为4.7时,在搅拌器转速为150 r/min、斜板高度为16 cm、给矿量为100 mL/min及底流与溢流体积比为1:3.5的条件下,经设备一次脱硅处理,可得到Al2O3回收率为90.64％、铝硅质量比为6.34:1的精矿.

Flow field simulation and experimental study of self-made hydraulic classification equipment for bauxite desiliconization

The flow field in the self-made hydraulic classification equipment was simulated by Fluent 6.3 software.The simulation results show that the slight turbulent in the cone zone makes the mineral particles disperse and separate in the radial direction.The upwelling makes the solid phase move up,especially for silicates with the small particle size and low density,leading to the separation of alumina phase and silicon phase in the radial direction.The sloping plates improve the sedimentation efficiency of alumi...