Improvement and application of hydrocyclone and dehydration screen in dry discharge of tailings

Fujiashan Mining tailings dry drainage process using C-FX250/GT conventional concentrated hydrocyclone and STS2145-XS light-duty dehydration screen for tailings matter carry out concentrated dry row.Due to the overall particle size of tailings is too fine, resulting in high water content of dehydration screen material, low comprehensive recovery rate of dry drainage integrated machine and high load of subsequent pressure filtration system.In view of the above problems, the hydrocyclone (specifications and models, feeding methods, cone angle, etc.) and dehydration screen (vibration frequency, inclination angle, sieve hole, etc.) are reformed in two directions.The practice results show that Smax200/PU-B high efficiency concentration desliming hydrocyclone and STS2445-GP high frequency linear dehydration screen are used to concentrate and dry drain tailings.Compared with the original equipment, the water content of the material released from the dehydration screen is reduced by 6.91%, and the comprehensive recovery rate of the all-in-one dry discharge machine is increased by 13.05%.The improvement of hydrocyclone and dehydration screen can effectively improve the recovery rate of dry drainage and reduce the cost of pulp flocculation and pressure filtration in the subsequent process.