Vibratory Screens : Innovations in Screen Designs

Abhrasnata Das

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One of the most common forms of industrial screening machinery is vibratory screens. In the solid waste management, recycling, and aggregate sectors, there are a number of mechanical screening options available. However, vibrating screens have a number of distinct features that make them the first choice for a wide range of industrial applications.

In vibratory Screens, the vibrations cause particles to lose their surface tension, which forces them to split. The "fines," or undersized particles, then pass past the screening layer. Oversized particles are being transported across the screen surface in the meantime. The mineral processing industry, in particular, values this use highly.

New vibratory screen design and technologies are now coming in the market, in this article let's look into the key few.

Circular vibrating screen

Having several layers of screen and great efficiency, circular vibrating screens are a novel form of vibrating screen. The high manganese steel woven screen, punched screen plate, and rubber screen plate can all be employed depending on the materials being used and the needs of the users. It has a seat-type installation for the circular vibrating screen. By adjusting the location and height of the spring support, the angle of the screen surface may be adjusted.

The circular vibrating screen has a motion track that revolves around the screen box.Inertia exciter is used to create vibration in the circular vibrating screen. Today, the circular vibrating screen is widely used in the materials classification of mining, building materials, transportation, energy, chemical industry and other industries because of its long flowing line and many screening specifications.

Thyssenkrupp Mining Technologies, a German based entity, has introduced new circular vibrating screen designs that offer a substantial plus with regard to reducing production costs, installation effort and maintenance for the operators.

Electromagnetically- Driven Grizzly Screen

Grizzly screen is often used for pre-screening before coarse and medium crushing of materials. The mesh size is generally >50mm, but sometimes <25mm.

Although the grizzly screen has a straightforward and sturdy construction, zero power consumption, no moving parts, minimal equipment costs, and easy maintenance, it has poor productivity, a screening efficiency of 50 to 60 percent, and a mesh that is easily obstructed.

Typically, the grizzly screen is positioned at an angle, with the materials being dropped at the top. The particles that are smaller than the gap or hole on the screen surface pass past the screen to accomplish classification as it slides down the screen surface under the force of its own weight.

JVI, an US based company, is delivering Electromagnetically- Driven Grizzly screens to its clients. JVI Electromechanical Vibratory Grizzly Screens, also known as Grizzly Feeders, are a heavy-duty solution for efficiently screening and feeding dissimilar sized material. The JVI Vibrating Grizzly Screen removes fines and evenly feeds oversized material for downstream equipment.

Upgraded Elliptical Screen

Elliptical vibrating screen is a vibrating screen with elliptical motion track, which has the advantages of high efficiency, high screening accuracy and wide range of application. It offers a greater screening efficiency and a bigger processing capacity than a standard sieve machine with the same specifications. In sand plants, triaxial elliptical vibrating screens are frequently utilized for the screening process of sand and stone materials.

For all types of mines, quarries, and mobile screening stations, it is the best screening equipment.The screens' contents travel at a high rate of speed in an elliptical pattern in tandem with the screen machine in order to classify the materials fast by separating, shifting, and moving ahead.

For a Brazilian iron ore company, Haver & Boecker, Niagara designed a new Niagara XL-Class vibrating screen with an elliptical motion. The new technology can readily manage capacities up to 3,500 tonnes per hour while using the least amount of water, making it perfect for screening applications that are hampered by high moisture content. In a high-moisture iron ore screening application, the XL-Class operates in an elliptical motion of up to 6g to guarantee stratification in all screening stages. The new vibrating screen also has a strong elliptical exciter drive with a 75,000-hour bearing life.

The Future Trends

For a comprehensive refining and separation process, vibrating screens are the innovators in every significant and well-known sector.

This equipment is in high demand and streamlines the process in anything from mining operations to food processing facilities. Driving efficiency at a lower cost as a result.Of all the large businesses, handling the high flow rate of materials is undoubtedly the best option.