Linear Vibrating Dewatering Screen

The linear vibrating dewatering screen is a kind of equipment that utilizes two vibrating motors or excitation devices to generate linear excitation force, causing the screen box to perform linear reciprocating motion. This enables efficient separation of materials, such as dewatering, desilting, and desilting. Higher vibration frequency, smaller amplitude, more reasonable sieve surface inclination, and special sieve mesh structure are designed to minimize the moisture content of the materials, meeting the requirements for subsequent dry discharge, transportation or reuse.

1.Excitation force generation: Two vibration motors are symmetrically installed on both sides of the sieve box, with opposite rotation directions and synchronized phases. The excitation forces in the vertical direction perpendicular to the motor axis add up, while the excitation forces in the parallel direction cancel each other out, thereby generating a single-directional linear excitation force on the sieve box. This excitation force is at an angle to the sieve surface (usually 45°–60°), causing the material to perform a linear throwing motion on the sieve surface.
2.Material transportation and dehydration: The slurry (such as coal slime water, mineral slurry, sand-water mixture) is uniformly fed into the sieve surface from the feed end. Under the vibration effect, the material is thrown up and jumps forward, forming a thin layer (usually 50–150 mm thick). Water passes through the sieve mesh under the action of gravity and falls into the water collection tank below, while the vibration also promotes the separation of water molecules from solid particles, accelerating the dehydration process.
3.Dehydration mechanism: High-frequency vibration causes the material layer to continuously loosen and reorganize, breaking the surface tension and capillary action of water, making free water easier to penetrate the material layer and the sieve mesh. At the same time, the sieve surface usually has a certain negative inclination (the feed end is higher and the discharge end is lower, or vice versa), prolonging the residence time of the material on the sieve surface and improving the dehydration effect.
4.Product output: The dehydrated solid materials are discharged from the discharge end. The moisture content is usually controlled at 10%–20% (depending on the particle size and nature of the material); the water and fine particles below the sieve enter the water collection tank and are sent to the concentration tank or the circulating water system by pipelines.

High-frequency vibration system: Two high-performance vibration motors (or one exciter) are used, with adjustable frequency and large excitation force, ensuring that the materials are fully loosened and dehydrated under high-frequency vibration. The vibration motors are connected to the screen box with high-strength bolts, and are equipped with anti-loosening washers.
Design of large-angle screen surface: The screen surface usually has a negative inclination angle of 5°–15° (the input end is higher than the discharge end), allowing the materials to stay on the screen surface for a longer time, and utilizing gravity to assist in drainage. Some models adopt multiple inclined angles (the input end has a large inclination angle for rapid discharge, and the discharge end has a small inclination angle to extend the dehydration time).
High-efficiency dehydration screen mesh: The screen mesh material mostly uses polyurethane (PU) screen plates or stainless steel welded screens, with a high opening rate, and is resistant to wear and corrosion. The screen hole shape is mainly in the form of long strips (striped screen), which is conducive to water passing through while retaining solid particles. The strip width is usually 0.2–2.0 mm, selected according to the particle size of the material.
Feed and discharge device: The input end is equipped with a feeding box/breeder, which evenly distributes the slurry on the width direction of the screen surface, avoiding uneven loading. The discharge end is equipped with a discharge chute, which guides the dehydrated materials to the next process. The inner wall of the chute is lined with wear-resistant lining plates.

Mining plant (black/ferrous/non-ferrous metals): Dewatering of fine materials such as iron concentrate, copper concentrate, lead-zinc concentrate, etc., to reduce the moisture content of the concentrate and facilitate transportation and subsequent smelting.
Sand and gravel production line: Dewatering of mechanically produced sand to make the finished sand meet the requirements of concrete mixing stations (usually ≤10%). It is often used in combination with sand washing machines to form the "sand washing + dewatering" process.
Environmental protection and solid waste treatment: Sludge dewatering, riverbed sediment dewatering, construction mud dewatering, converting high moisture content waste into solid state that can be stored and transported.
Chemical and food industry: Solid-liquid separation scenarios such as crystalline salt dewatering, starch dewatering, cellulose dewatering, etc.
Dry discharge of tailings: Dewatering the tailings slurry and then dry stacking it to reduce the pressure on the tailings storage facility and lower the risk of dam collapse.

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