Linear vibrating screens provide efficient screening by incorporating conveying element
Fri, 09 Mar 2018
With efficiency at the forefront of any processing line, separating out materials – whether for coarse grading, fine grading, de-dusting, dewatering or protective screening – can prove to cost time and space when the separation process is not efficiently incorporated into the rest of the line. However, a vibrating screen with a predominantly linear product displacement incorporates a conveying element as well as separating, meaning that product can be separated as required whilst passing onto the next process in the line and retaining production efficiency.
A linear vibratory screen can be designed in open or fully enclosed construction with bodies manufactured from carbon or stainless steel – or combinations of both materials. These combine lightness with strength and high wear resistance for a long working life. Open construction models often discharge under-sized product into a storage hopper or conveyor. Enclosed models, incorporating either bolted or quick release dust tight covers against atmospheric pollution, collect in conveying pans and discharge through a spigot outlet below.
With the ability to convey whilst separating, a linear vibrating screen is often used for container filling and safety screening – protecting against agglomeration, over-sized product or large particles which could cause problems in processing or quality control further down the line, whilst maintaining optimum feed rate. Another common application is to incorporate a hopper with a screen – discharging from the hopper, removing the fines and feeding the material onto an inspection deck, thus improving the efficiency of inspection.
A linear unit can be fitted with a single screening deck, multiple decks, or with interchangeable panels if the unit is to handle varying materials, all offering easy clean down and maintenance. As with all industrial vibration equipment, wear to the deck or panels is minimal and excellent separation characteristics mean minimal pegging or blending during operation. An electromagnetic drive unit can be fitted for control over conveying speeds, or alternatively a vibrator motor for high capacity throughput and continual operation.
Linear vibration screens are successfully used for:
- Coarse grading – of bulk materials where extreme sizing accuracy is not required
- Fine grading – for high accuracy over particle sizes less than 3mm down to 50 microns
- De-dusting – for the extraction of undersized particles
- Protective screening – for the removal of oversize particles, impurities and other foreign bodies etc.
- Separation – for removal of coarse material from fines
- Dewatering – for recovery of solids from washing media
- Extraction – for removal of non-soluble impurities from washing and carrier fluids.