HYDROCYCLONES - HYDROVORTEX®
AMP® offers a wide range of models and sizes of Hydrovortex ® Hydrocyclones.
The Hydrovortex Hydrocyclones are produced in two alternative methods: construction in polyurethane or polymers, as integral design; or construction in steel-rubber, with shell fabricated from mild steel, with protective paint, equipped with replaceable liners in different elastomer materials depending on the application. Special corrosion and heat-resistant hydrocyclones are also available for specific processes.
The modular construction of these units, in conical or cylindrical form, facilitates component interchangeability among hydrocyclones of different sizes and materials. Maintenance is simple and convenient, thanks to the hydrocyclone assembly system.
Hydrovortex Hydrocyclones are used for a variety of industrial applications, including: Sand washing, removing undesired contaminants of minus 50-150 micron; Recovery of fine sands lost in the overflow of inefficient/obsolete washing equipment; Production of two-sands and ultra-fine sand; Classification of solids in the range of 10-300 micron, such as in grinding circuits and mineral ores pre-concentration; Slurry thickening, prior to concentration stages; Partial clarification of effluents; Counter-current washing circuits; flue gas desulphurization (FGD) of termal power plants; and other solid-liquid separation processes.
The main function of the Hydrovortex Hydrocyclone is to separate the suspended solids in a slurry feed into two fractions, the "underflow" carrying suspended coarse solids above the predetermined size of cut, and the "overflow" containing finer size solids in suspension
The feed slurry enters the cylindrical section tangentially under a predetermined pressure (some function at lower pressures, some at high – there are advantages and disadvantages to each types), causing it to swirl around the longitudinal axis of the hydrocyclone and descend toward the cone apex section.
With the centrifugal forces generated, the coarser particles rotate near the wall and are evacuated through the apex cone in the form of thick slurry. As the apex is small in size, only part of the suspension is evacuated, while a secondary swirling flow is created in the core of the cone and moves upward, transporting the fine particles together with most of the liquid. This suspension is discharged through a central pipe located in the upper end of the hydrocyclone. By regulating the acceleration of the swirl and varying the hydrocyclone geometry and nozzle dimensions, the cut-point can be adjusted from 50 to 500 microns.
Cylindrical hydrocyclones with central discharge, called Flat Bottomed Hydrocyclones, or by the acronym CBC (Circulating Bed Classifier) have specific characteristics that differentiate them from conventional conical hydrocyclones for their suitability for coarse particle sizing, as well as in providing a more stable operation to handle inconsistencies of the infeed – flow rate and especially in the concentration of solids. Hydrocyclones CBC creates a third stream generated by a fluid bed of solid particles on the bottom, which move from the periphery of the hydrocyclone towards the central discharge. This current is essential to prevent blocking of discharge of thick slurries with high solids concentration values. Its main application is in the production of special sand gradings.