Mining vibrating screens

Linear Vibrating Screen: How It Works and Where It Fits

Short answer: a linear vibrating screen uses two motors turning against each other to throw material along a straight line, so it conveys and screens on a level or slightly inclined deck. It suits grading of granular minerals, wet screening and dewatering.

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A linear vibrating screen is often installed as a horizontal vibrating screen, or at a slight incline, for sizing crushed ore, sand and other dry or damp feeds.

Specifications on request — send your material, capacity and mesh size.

Working principle

Two identical unbalanced motors are mounted on the screen box and run in opposite directions. Across the box their forces cancel; along the throw line they add. The result is a straight-line stroke at an angle to the deck, which lifts each particle and lands it a little further forward. Each landing is a chance to pass the aperture, so the screen both conveys and classifies without needing a steep slope.

Position in the line

Common positions are final product grading of quartz, silica sand and feldspar, de-dusting before bagging, and screening ahead of a dry powder magnetic separator so the separator sees a controlled size range. With spray water it works as a wet screen; with fine panels and an uphill deck it becomes a dewatering screen.

Linear vs circular vibrating screen

Choose linear for granular feed, several product sizes on a low-headroom structure, or wet duty. Choose circular for coarse, heavy crushed rock where an inclined deck and a single robust exciter are preferred.

Selection checklist

Feed: material, top size and the share of fines or clay; whether it is dry, damp or a slurry.
Cut: the aperture or mesh you separate at, and how many products you need (this sets the deck count).
Throughput: tonnes per hour reaching the screen, including any circulating load from a crusher or mill.
Duty: dry sizing, wet sizing with spray bars, de-sliming or dewatering.
Screen media: woven wire, polyurethane or rubber panels, or perforated plate, matched to abrasion and blinding risk.
Plant interface: feed chute and discharge positions, structure height, and the local supply voltage and frequency.

Specifications

Specifications on request — send your material, capacity and mesh size. Deck size, deck count, screen media and drive are confirmed in the quotation for your duty.

Linear Vibrating Screen: questions

How does a linear vibrating screen work?

Two counter-rotating vibration motors create a straight-line stroke. The stroke throws particles forward along the deck; undersize passes the openings and oversize leaves at the discharge end.

Where is a linear screen used in a silica sand line?

For grading the finished sand into product sizes, for de-dusting, and for preparing an even feed before magnetic separation.

Linear or circular — which is better?

Neither in general. Linear suits granular, wet or multi-product duty on a level deck; circular suits coarse crushed rock on an inclined deck.

What does a linear vibrating screen cost?

It depends on deck area, deck count, screen media, construction and motors. PTMS quotes by email from your material, capacity and mesh size.

Related equipment

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Send your material, capacity and mesh size (or target cut). Our engineers match the screen type, deck count and screen media and reply with a quotation.

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