Hydrocyclones are widely employed in both heavy and light industries. However, exact mechanisms underlying enhanced-separation technologies developed by optimizing operating parameters and conditions in hydrocyclones remain unclear. Accordingly, many research groups have conducted numerous investigations to expand the application range of hydrocyclones by optimizing operating parameters and conditions. This paper presents a comprehensive state-of-the-art review of the aforementioned hydrocyclone enhanced-separation technologies, which are classified into two groups: (i) operating parameters, including feed flow rate, feed pressure, feed density difference, feed particle parameters (concentration, size, shape, and arrangement), and feed fluid parameters (viscosity and rheology); and (ii) operating conditions, including electrical hydrocyclones, magnetic hydrocyclones (electromagnetic field and permanent magnetic field), magnetic fluids hydrocyclones, electrochemical hydrocyclones, flocculant-assisted hydrocyclones, hydrocyclones enhanced by flotation, hydrocyclones enhanced by control particles; hydrocyclones enhanced by adjusting back pressure, and hydrocyclones enhanced by monitoring and automatic control. These enhanced-separation technologies were analyzed and summarized based on the critical separation-performance parameters, such as separation efficiency, cut size, split ratio, energy consumption, capacity, and separation sharpness. It is hoped that both reviewed contents and proposed challenges may be helpful to the researchers and eventually yield some perspective knowledge, which results in the improvement of economic feasibility of separation by hydrocyclones.

水力旋流器广泛用于重工业和轻工业。但是，通过优化水力旋流器的运行参数和条件开发的增强分离技术的确切机制仍不清楚。因此，许多研究小组进行了许多研究，以通过优化操作参数和条件来扩大水力旋流器的应用范围。本文介绍了上述水力旋流器强化分离技术的最新技术综述，该技术分为两类：（i）操作参数，包括进料流速，进料压力，进料密度差，进料颗粒参数（浓度，大小，形状和排列）和进料流体参数（粘度和流变性）；（ii）操作条件，包括水力旋流器，磁性水力旋流器（电磁场和永久磁场），磁性流体水力旋流器，电化学水力旋流器，絮凝剂辅助水力旋流器，浮选增强的水力旋流器，控制颗粒增强的水力旋流器；通过调节背压增强水力旋流器，通过监测和自动控制增强水力旋流器。根据关键的分离性能参数对这些增强的分离技术进行了分析和总结，这些参数包括分离效率，切割尺寸，分离比，能耗，容量和分离锐度。希望所复习的内容和提出的挑战都可能对研究人员有所帮助，并最终产生一些见识，从而提高水力旋流器分离的经济可行性。