齐大山铁矿粗细分级旋流器数值优化试验研究

为提高齐大山铁矿选矿厂?]660 mm粗细分级水力旋流器的沉砂产率，从而增大后续重选作业的给矿量，基于数值模拟方法系统考察了水力旋流器结构参数对水力旋流器分离性能的影响。结果表明：增大沉砂口直径和柱段高度可以有效提高各粒级在沉砂中的分配率，而增加溢流管直径和小锥锥角则相反。基于数值试验结果进行了粗细分级水力旋流器工业试验，与原旋流器相比，优化后的旋流器沉砂产率提高了7.67个百分点，在保证分级效率的前提下可以有效提高沉砂产率。优化后的水力旋流器可以有效增加重选作业给矿量，并为同类型矿山的水力旋流器结构设计提供参考。

Research on Numerical Optimization of Hydrocyclone of Coarse and Fine Fractions Classification in Qidashan Iron Mine

In order to improve the underflow yield of ?]660 mm hydrocyclone in Qidashan iron ore concentrator and increase the ore feed of subsequent gravity separation operation， the influence of hydrocyclone structure parameters on the separation performance of hydrocyclone was systematically investigated based on numerical simulation method. The results showed that the recovery of each particle size in the underflow can be increased by increasing the diameter of the spigot and the height of the column section， while increasing the diameter of the vortex finder and the cone angle presents the opposite trend. According to the results of numerical simulation， the industrial test of hydrocyclone used for coarse and fine classification was carried out. Compared with the original hydrocyclone， the underflow yield of the optimized hydrocyclone increased by 7.67 percentage， which can effectively increase the underflow yields under the premise of ensuring the separation efficiency. The ore feed of gravity separation operation can be increased by optimized hydrocyclone，which provides reference to the structural design of hydrocyclone in similar mines.