Vibrating screens are used to separate material of varying sizes. Common uses include:
- Sizing of particles on single or multiple deck systems.
- Removing fine powders in the de-dusting process.
- Separating large pieces on scalping screens.
- Washing or wet screening or even de-liquefying on a de-watering screen.
- Cleaning castings on foundry shakeouts or degrading sand lumps into grain size on shaker lump breakers or attrition mills.
Vibroflow offers a wide selection of designs of screens to facilitate specific requirements. We can assist in the selection of the appropriate screening technology to satisfy clients’ requirements.
When the distribution of material across a screen deck is important then screens are usually fed by different types of feeders or specially designed feed boxes. Screens designed by Vibroflow can combine a feeder and a screen into one unit eliminating the transition between units.
Types of Screens
Screens come in many different shapes and sizes. Below are a few of the more common types:
The two types of vibratory drives supplied by Vibroflow are direct drive and sub resonant tuned.
Direct drive involves locating two motors directly onto the trough of the vibrating screen. Vibration is applied through the trough to the material. The primary benefits of this drive is its simplicity and low cost. This is a common drive choice for smaller pilot screens.
Sub resonant tuned introduces a counter-mass as a mounting point for the motors. The output of the motor is tuned to the natural frequency of the screen. Primary benefits include low power consumption, low dynamics and extra long life. This drive type is more typically used in large screens for the mining industry. More information can be found on the Sub Resonant Information Sheet.
Vibratory equipment can be built from different materials to satisfy application requirements. Stainless steel can be used to satisfy hygiene regulations or to not interfere with magnetic equipment. Troughs can be made from bisalloy or other wear resistant steels to ensure long life.
Liners are used to prolong equipment life. A replaceable liner will be much cheaper to replace than the entire trough of a vibratory feeder. The best liner for the application will be based on the required wear resistance, friction coefficient and access for maintenance. Typical liner materials include steel, stainless, bisalloy and polyurethane.
Sizing and Design
Vibroflow can assist in correctly sizing a screen for an application. Our engineers are also able to design screens around plant layouts or existing plants.