page_title: High-frequency vibrating screens
section_title: Available designs
hierarchical_section_title: High-frequency vibrating screens / Available designs
caption_attribution_description: English: A mobile screening equipment which only has a single deck.
context_page_description: High frequency vibrating screens are the most important screening machines primarily utilised in the mineral processing industry. They are used to separate feeds containing solid and crushed ores down to approximately 200μm in size, and are applicable to both perfectly wetted and dried feed. The frequency of the screen is mainly controlled by an electromagnetic vibrator which is mounted above and directly connected to the screening surface. Its high frequency characteristics differentiates it from a normal vibrating screen. The high frequency vibrating screens usually operates at an inclined angle, traditionally varying between 0 and 25 degrees and can go up to a maximum of 45 degrees. Besides, it should operate at a low stroke and has a frequency ranging from 1500 - 7200 RPM.
  Pre-treatment of the feed is often required before the use of the high frequency screen as the apertures in the screen may become blocked easily.
context_section_description: Conventional and general design for a high frequency vibrating screen consists of mainframe, screen web, eccentric bock, electric motor, rub spring and coupler. The two most common types of vibrators which induce the high frequency vibrations are hydraulic or electric vibrators, these electric vibrators are either electric motors or solenoids. Common designs for screening decks are either single or double deck. In addition, another feature of high frequency vibrating screens are the static side plates which provide benefits such as smaller support structure, less noise, longer life, and hence less maintenance. In industry, the screens are operated at a tiled angle up till 40 º. The high frequency (1500 – 7200 rpm) and low amplitude (1.2 – 2.0 mm) characteristics leads to the vertical-elliptical movement that rapidly transports oversized particles down the screen. Creating a thin bed of particles, this improves the efficiency and capacity of the screen.
  	
  Stationary screens are typically used in plants and not moved around. In the mineral processing industry, equipment often has to be moved to different sites depending on the jobs taken up by a company. Mobile screens thus are another viable design for companies who have to move their equipment often. These include wheel-mounted and track-mounted plants which allow for easy transportation and movement of the screens. Typical mobile screen designs are shown in the diagrams on left.
caption: A mobile screening equipment with a single deck.[10]
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