铜山口铜矿水力旋流器数值优化试验研究

为提高大冶有色铜山口铜矿选矿厂FX500水力旋流器的分级精度、降低底流夹细量，通过数值模拟方法系统考察了旋流器结构参数和操作参数对旋流器分离性能的影响，结果表明：①适当增加入口流速、降低给矿浓度，可从整体上降低底流夹细量和溢流跑粗量；②适当增大柱段高度和小锥锥角，可进一步降低底流夹细量；③适当增大沉砂口上锥角角度，对底流中的微细粒级有洗涤作用，能进一步降低底流夹细量；④现场对比试验证实，旋流器结构优化后底流-75 μm粒级夹细率下降了1.78个百分点。研究结果为铜山口铜矿水力旋流器的优化与改造提供了技术支撑。

Experimental Study on the Numerical Optimization of Hydrocyclone in Tongshankou Copper Mine

In order to improve the classification accuracy of FX500 hydrocyclone in tongshankou copper mine and reduce fine particles in underflow， the influence of structure parameters and operation parameters on the separation performance of hydrocyclone was systematically investigated by means of numerical simulation method. The results indicated that: ①Fine particles in underflow and coarse particles in overflow could be decreased as a whole through increasing the inlet velocity and reducing the concentration of ore feeding. ②By increasing the height of column segment and the cone angle， fine particles in underflow were further reduced. ③In addition， fine particles were further washed from underflow and reduced their misplacement in underflow via increasing the upper taper angle of grit mouth. ④The results of on-site experiments verified that the -75 μm particles in underflow of the optimized hydrocyclone decreased by 1.78 percents compared with that of the original hydrocyclone. These results would provide technical supports for optimizing and reforming the hydrocyclone of tongshankou copper mine.