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Overflow pipes are important components of hydrocyclones. The overflow products can carry huge amounts of residual energy when being discharged. In order to take full advantage of the residual energy and enhance hydrocyclone separation performance, this research designed a novel hydrocyclone by adding static mixing units with spiral elements in the...
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... studied a cylindrical-conical hydrocyclone with a flat-bottom conical structure and found that the wide flat-bottom structure increased the cut particle size and reduced the misplacement of fine particles in the underflow. Liu et al. (2023) found that adding a helical structure to the overflow pipe of a hydrocyclone can reduce the pressure drop and explored the optimal location of the helical structure within the hydrocyclone. Qiu et al. (2023) investigated the effects of spiral blade pitch, number of turns and number of heads on the hydrocyclone and obtained an efficiency of 90% and a pressure drop of 0.05 MPa for the hydrocyclone with optimal parameters. ...
Aiming at the problem of “entrainment fine particles in underflow” of hydrocyclone in grinding and classification process, a hydrocyclone with spiral vanes (the SV hydrocyclone) was proposed. The CFD techniques were used to study the pressure field, velocity field, turbulence field, particle field and classification efficiency of hydrocyclones with spiral vanes of different widths. The results show that the pressure drop, axial velocity, tangential velocity, turbulence intensity of SV hydrocyclone are reduced in different degrees compared with conventional hydrocyclone, and the reduction becomes more obvious with the increase of vane width. In the case of a vane width of 0.04D, the underflow recovery rate of 5μm and 10μm fine particles was reduced by 16.2% and 15.7%. The selection of spiral vanes with small widths is beneficial to improve the separation accuracy of fine particles and reduce the cut particle size.
