The Cavex® DE double efficiency hydrocyclone notably improves the Global Classification Efficiency, increasing the Sharpness of separation and significantly reducing the by-pass of fines to the underflow. This notable decrease of by-pass, is obtained by the new design, which is oriented to influence the flow of the viscous layer of fluid close to the hydrocyclone walls. This is achieved by mechanically disrupting this viscous layer and altering its viscosity by water injection.

This reengineering process of a simple idea has allowed a significant improvement of previous design attempts.

Double Unit design

Undoubtedly a notable improvement in the Cavex® DE double efficiency hydrocyclone is achieved by using two or more units connected in series. Nevertheless, the operation costs are significantly higher and in most of the industrial applications this solution is avoided. Consequently, in order to improve the hydrocyclone performance, several attempts have been made combining two classification stages in one unit. However, these designs share common problems such as; high wear in the transfer zone, poor control over the flow proportion that goes to the second stage and need of operating at high pressure.

TheCavex® DE double efficiency hydrocyclone design

The Cavex® DE double efficiency hydrocyclone uses the same double classification concept in an single unit, notably improving deficiencies of previous designs.

The Cavex® DE double efficiency hydrocyclone not only added an ingenious device to control the flow distribution to the second hydrocyclone, but also solved the wear problem in the transition zone, through a better control of the turbulence in the zone. With this, escape of coarse particles to the overflow of the second cyclone was notably improved. Additionally the critical pressure, in the first cyclone, at which the second cyclone starts its operation, was significantly reduced. This conceptual solution permits Cavex® DE double efficiency hydrocyclone  in practice to be operated at similar pressure drops as a conventional hydrocyclone.

On top of that its modular design, made of interchangeable parts, allows the replacement of only those parts submitted to wear, increasing thus useful life of the unit and dramatically decreasing the maintenance costs.

Advantages of the Cavex® DE double efficiency hydrocyclone

In a summary with the Cavex®  DE double efficiency hydrocyclone  you may:

*  Improve the Global Classification Efficiency.
*  Reduce substantially, the by-pass of fines.
*  Significantly reduce wear in transition zone.
*  Reduce the operation and maintenance costs.
*  Improve quality of the flotation product.
*  Significantly increase capacity of the grinding-classification circuits.