Mining Vibration Screen

The mining vibration screen is the core equipment in the crushing and screening production line of the mining industry, responsible for material classification. It is used to separate the raw ore or crushed products into different grades before and after crushing, thereby controlling the final product specifications, protecting downstream equipment, and improving the overall crushing efficiency of the line. The mining vibration screen is designed for heavy-duty conditions: large processing capacity, strong impact load, high dust and erosion environment, and long-term continuous operation - therefore, it places greater emphasis on structural rigidity, excitation reliability, wear resistance life and maintainability, rather than simply the screening accuracy.

The working principle of the mine-use circular vibrating screen is based on the periodic excitation force generated by the eccentric excitation: eccentric blocks are installed at both ends of the exciter shaft. As the shaft rotates, the eccentric mass generates centrifugal force, pushing the screen box to perform approximately circular reciprocating vibration in the vertical plane, thereby forming a circular (or nearly circular) trajectory motion on the screen surface.
After the material is fed into the screen surface from the receiving end, it is repeatedly lifted by the circular vibration and pushed towards the discharge end. During the throwing-off cycle, the material layer continuously rolls and stratifies - coarse particles float to the upper layer, fine particles sink to the bottom and come into contact with the screen surface, particles smaller than the screen holes pass through the screen mesh and fall into the lower collection area under the action of vibration and gravity, and particles larger than the screen holes move along the screen surface to the discharge end and are discharged. By changing the weight/angle of the eccentric blocks, adjusting the inclination angle and amplitude of the screen surface, the relationship between "processing capacity" and "screening efficiency" can be balanced.

01 Robust Structure​

The machine mainly consists of a sieve box, exciter, suspension (or support) device, and motor. By adjusting the eccentric weight of the exciter, different amplitudes can be achieved.

02 High Screening Efficiency​

The strong vibration of the sieve box effectively reduces material blockage at the screen holes, resulting in higher screening efficiency and productivity.

03 Easy Maintenance​

The vibration unit can be disassembled and reassembled as a whole, making maintenance and replacement more convenient and significantly shortening the maintenance cycle.

04 Long Service Life​

A flexible coupling connects the motor and the exciter, minimizing the impact on the motor. Rubber springs are used for vibration damping, ensuring low noise and small dynamic loads at each support point.

Heavy-duty rigid structure: The side plates of the screen box are made of thick plates and welded into a box-type structure. Horizontal reinforcing beams are placed inside, and replaceable liners or double-layer wear-resistant plates can be selected at key cutting points. The core goal of the overall machine's rigidity design is to remain undamaged, unchanged, and with tightened bolts under long-term high-frequency impact and vibration.
Reliable excitation system: The mainstream adopts dual-axis exciter (gear forced synchronization or self-synchronous self-centering structure), and the excitation force direction is calculated based on the bearing load path; the connection surface between the exciter bearing seat and the side plate is precisely processed, and high-strength bolts with anti-loosening structures are used to reduce micro-friction wear and fatigue cracking risks.
Screen surface system diversification: The screen is not just one type of "mesh" - depending on the hardness of the material, moisture content, and product requirements, the screen surface can choose high-manganese steel/alloy steel woven screen mesh, wear-resistant perforated screen plates, rubber screen plates, or polyurethane screen plates; for medium and large-sized machines, segmented plates are commonly used for connection, and replace the worn-out plate when necessary to reduce downtime costs.

Ferrous and Non-Ferrous Metal Mines​

After primary crushing and pre-screening, raw ore undergoes inspection and classification to separate materials by size. Particles meeting the required dimensions go directly to stockpiles or the grinding stage, while oversize material is sent back for further crushing. In iron, copper, gold, and manganese mining operations, the circular vibrating screen acts as a critical checkpoint-it determines whether the crusher is overloaded and whether the mill receives acceptable feed.

Coal Washing and Classification​

Raw coal is sorted by particle size into fractions such as +50 mm, 25–50 mm, 13–25 mm, 6–13 mm, and -6 mm. The vibrating screen also plays a role in desliming and dewatering stages within dense medium circuits, where linear dewatering screens are more commonly applied.

Sand and Gravel Production Lines​

Crushed aggregates are classified into finished grades like 0–5 mm, 5–10 mm, 10–20 mm, and 20–31.5 mm. Circular vibrating screens fitted with highly wear-resistant panels can endure prolonged exposure to hard rock abrasion.

Cement Raw Material Crushing​

Materials such as limestone, clay, and sandstone are first crushed and then screened to regulate grinding particle size, helping to stabilize the raw meal preparation process.

Solid Waste and Recycled Aggregates​

In construction waste recycling, vibrating screens classify reclaimed materials by particle size, enabling concrete fragments and brick residues to be redirected for appropriate reuse.

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