The mechanical screening which is often called screening is a process in which granulated material is transferred through screening equipment and separated into multiple grades by particle size. Material screening equipment manufacturer, manufacture the screening equipment which consists of a drive that includes vibration screen media for particle separation and a deck that holds the screen media. Screening equipment plays a key role in separating one material from another from the crusher or quarry and converting it into finer grades. The screening is done in two types, one is a wet screen and another is the dry screen. The wet screen has spray nozzles that provide water along with screen vibration during the sorting process. This helps in cleaning the slurry from the ore. The dry screen only uses vibration. Types Of Screening Equipment Trommel Screens (Revolving screens) Trommels are also known as revolving screens as these have cylindrical frames surrounded by a perforated plate. The trommels are mostly used in gold mines as they are efficient in recovering fine gold from the ores. The trommel has an opening on both ends and has a slightly inclined surface. When the material passes through the trommel the slight horizontal inclination angle helps in advancing the final material due to continuous rotation of the trommel. Vibrating Screens The modern high-performance vibrating screen is designed by a material screening equipment manufacturer to enhance productivity. The equipment has numerous operating benefits compared to conventional separators. The circular Vibro-screens are useful or application where hygiene is most important. These screens are rapidly vibrated at small amplitude to ensure the material is moving. It prevents the binding of material inside the vibrator. Oscillating Screens These screens are also known as gyratory screens. The screening equipment is mostly used in the wood processing industry. This screening equipment is used for separating wood chips, wood shavings, waste wood, and wood pallet based on dry and wet raw material. The sieve box of the oscillating screen has a horizontal circular movement. It has a mounted angle that helps in advancing the material for efficient separation. The benefit of using the oscillating screen is that the long and fibrous particles slide through it diagonally to tangentially on the screening surface. This prevents the clogging of material in the sieve box. Grizzly Screens The grizzly screens are for the toughest application so these are mostly used in the steel and iron manufacturing industry. The screens of this screening equipment have a robust design making them suitable for operating in tough conditions. The grizzly screen has a grid of parallel bars which are inclined slope angles from 30-45 degrees. The advantage of using the screen is it does not require much maintenance and servicing. Conclusion The screening equipment must match the requirement of the job and function in a suitable environment. There is a need for customization in screening machines and material screening equipment manufacturers are focusing on that with advancement in design. Mining, mineral processing, and aggregate industries are the biggest users of screening equipment.
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AuthorAuthor is an Industrial Expert in Bulk Material & Mining Industry. Archives
May 2022
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