Most Common Types of Vibrating Screens and Their Key Features

April 26, 2022

Many industries can take advantage of vibrating screens. Some of these industries are pharmaceutical, chemical, agriculture, mining, and manufacturing industries.

What makes vibrating screens great for these industries is they can help them separate and transport granulated materials that they deem useful for their subsequent industrial processes. Vibrating screens, in general, have a screening surface that mechanically vibrates at high speeds. The vibration of these machines ensures that some of the product particles will jump, hit, and pass through the screen openings.

Many types of vibrating screens have been designed to cater to the needs of various industries. Some of the most common vibrating screens and their primary features are as follows.

Inclined Screens

Inclined screens are known to be one of the most basic types of vibrating screens. These vibrating screens maximise a fixed inclined frame that is set around 15° to 30°. Their body can generate vibration circularly through their accompanying helical springs. Since inclined screens have a fixed slope, they can easily allow gravity to regulate the flow of the feed. The stroke of the inclined screens, alternatively, can be altered between 8 and 12mm by adding or removing additional eccentric masses. Inclined screens can be maximised by industries as they are simple to operate and do not require extensive maintenance.

Horizontal Screens

Horizontal screens are vibrating screens that are mostly set parallel to the ground. They mostly work with this specific formation. However, some models allow operators to change their incline between 0° and 5°. For the vibration of horizontal screens, they maximise triple drive mechanisms to create an elliptical vibration motion. Through the vibration of horizontal screens, the materials can be transported horizontally at a set velocity without the occurrence of plunging. As for their stroke, it can be adjusted between 14 and 20 mm. Just like inclined screens, horizontal screens do not need frequent servicing.

Dewatering Screens

Dewatering screens are vibrating screens that can drain water from materials to reduce their moisture rate. Some of the components of dewatering screens are a Vibro motor pair, a Vibro motor console, a screen body, and the screening media. The screening surface may be inclined slightly so that the water drainage can take place. The Vibro motors of dewatering screens can generate a linear vibration, allowing their screen body to vibrate with the slurry products. Since dewatering screens are always wet, their live frame vibrating loads are expected to be supported with rubber springs.

Grizzly Screens

Grizzly screens are vibrating screens that can process very coarse materials. They maximise parallel steel bars or rails that are affixed to the area where the materials will flow. The gap between the steel bars or rails may range between 50 to 300 mm. As for the incline, grizzly screens can be set at an angle of around 20°. The vibration of grizzly screens can be set by circulator or linear throw mechanisms. Most of the time, industries would use grizzly screens first before proceeding with their crushers as the former can easily separate fines at smooth, controlled feed rates.

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