vibrating screen for stone crusher

A vibrating screen for a stone crusher receives mixed stone material discharged from a crusher and separates ores of varying sizes using continuous vibration. The screening capacity ranges from 50 to 800 tons per hour, determining the output speed of the entire production line. To withstand the continuous impact and friction from high-hardness stones, the screen mesh is typically made of high-manganese steel wire or polyurethane casting, providing strong wear resistance and a lifespan of several months under continuous operation.

The entire machine uses a dual-motor self-synchronizing drive or an external vibrator, combined with overall frame conditioning to ensure structural stability under strong vibration. Its screening accuracy is typically maintained between 85% and 95%, preventing large particles from mixing into the fine finished product. Depending on the required finished product specifications, the number of screening layers can be selected as 1, 2, 3, or 4, allowing for the simultaneous output of 2 to 5 different aggregate sizes from a single unit.

What are the benefits of a vibrating screen for a stone crusher?

The vibrating screen for stone crushers can quickly separate finished products that meet aggregate standards, preventing qualified stones from re-entering the crusher for ineffective recycling, thus reducing mechanical wear and energy consumption. By adjusting vibration parameters, the residence time of materials on the screen surface is reasonably controlled, improving the screening rate and reducing the proportion of impurities in the tailings. Thanks to the modular screen fixing structure, operators can change the screen aperture within two hours to meet different order requirements, shortening downtime for adjustments.

Structure of the vibrating screen for stone crushers

The screen box of the vibrating screen for stone crushers abandons traditional welding, replacing it with high-strength steel plates and ring groove rivets for cold assembly. This stress-free connection makes the machine body less prone to cracking under high-frequency vibration, extending the service life of the equipment. The vibrator, as the power source, uses an external eccentric block combined with high-quality bearings, which not only outputs powerful oscillation energy but also is extremely easy to maintain. The internally installed multi-layered wear-resistant screen can be freely combined with square or rectangular holes, enabling the output of various sizes of stones from a single machine and preventing blockage of manufactured sand. The bottom-supporting steel spiral vibration damping springs absorb most of the vibration and impact, protecting the factory's foundation structure while reducing overall operating noise.

How does the vibrating screen for stone crusher screen?

The motor drives the eccentric block of the vibrator to rotate at high speed via a belt or coupling, generating strong centrifugal force, forcing the screen box to move in a circular or linear trajectory on the supporting springs. When the stone falls onto the inclined screen surface, the force causes continuous jumping and tumbling. Fine stones smaller than the screen openings pass directly through the mesh and fall into the lower hopper, while larger stones slide along the screen surface to the end for discharge, thus achieving grading according to stone particle size.

How to Choose the Right Model?

When selecting a model, consider the following technical specifications and material characteristics:

Material Particle Size and Hardness: Determine the maximum stone size that can enter the screen surface. If the raw materials are mostly large stones over 200 mm, a heavy-duty screening machine is required; if all aggregates are under 40 mm, a medium-light-duty machine is suitable.

Required hourly output: Match the screen area to the hourly output in tons. For example, a production line with an hourly output of 200 tons typically requires a screen width of 1.8 meters or 2.1 meters and a length of 6 meters.

Finished product specifications and quantity: If 3 types of finished stones are needed, select a 2-layer screen; if 4 types are needed, select a 3-layer screen.

Material moisture content: For sticky stones with a moisture content exceeding 5%, a high-amplitude, low-frequency parameter configuration should be selected, or a water spray pipe should be added for wet screening.

Vibrating Screen for Stone Crusher Model Parameter Table

Real Case

On a red granite manufactured sand production line in Saudi Arabia, the user's previous screening machine frequently experienced vibration cracks at the welded side plates and screen blockages, causing the entire line to be shut down for maintenance several times a week, delaying delivery schedules.

Later, the user adopted a 3YK2160 model (3-layer screen, 2.1 meters wide, 6.0 meters long) machine. This production line handles 0-40 mm materials discharged from a cone crusher. Operating continuously for 16 hours a day, the machine stably processes 240 tons of granite per hour. The upper layer is laid with 30 mm high manganese steel woven mesh, the middle layer with 15 mm square hole mesh, and the lower layer with 5 mm polyurethane strip mesh. After eight consecutive months of operation, none of the ring groove rivets loosened, and no cracks were observed in the side plates. The produced finished materials, 0-5 mm, 5-15 mm, and 15-30 mm in size, were clearly categorized, meeting the aggregate mix ratio requirements for the local light rail project's concrete.

Vibrating Screen for Stone Crusher Applications

Vibrating screens for stone crushers can be installed in various mineral processing and earthwork engineering processes. In river pebble and granite crushing plants, they follow jaw crushers or cone crushers to classify crushed manufactured sand and building aggregates. In limestone quarries, they are used to separate the raw materials required for cement production. In waste concrete recycling stations, this machine works in conjunction with construction waste crushers to separate recycled aggregates and fine soil. Furthermore, in the crushing workshops of metal mine beneficiation plants, it also undertakes inspection and screening operations in closed-circuit crushing processes.

Frequently Asked Questions

Q: What is the price of a vibrating screen for a stone crusher?

A: Small-scale lines with an hourly output of 50 tons range from $2,900 to $5,700; medium-scale lines with an hourly output of 150-300 tons range from $8,000 to $11,000; heavy-duty twin-shaft lines with an hourly output of over 500 tons range from $17,000. The price may vary depending on the polyurethane screen material and the brand of the bearings used.

Q: What is the purpose of a vibrating screen?

A: A vibrating screen uses mechanical vibration to separate loose stone into different particle size ranges, providing compliant raw materials for subsequent crushing processes or directly producing commercial sand and gravel that meets construction standards.

Q: What are the common problems with vibrating screens?

A: There are three main types: screen clogging caused by high moisture content; excessive heat generation caused by insufficient lubrication or bearing centripetal force misalignment; and side plate cracking caused by long-term overload metal fatigue.

Q: What is the difference between a trommel screen and a vibrating screen?

A: A trommel screen uses slow tumbling of a cylindrical drum and gravity screening, suitable for sticky, weakly abrasive materials smaller than 100 mm. A vibrating screen uses high-frequency vibration to make the material jump, making it more suitable for grading large aggregates with high hardness and strength.

A vibrating screen for stone crushers is a mechanical device responsible for quality control in sand and gravel aggregate production lines. Through the regular vibrations induced by a vibrator, it achieves the grading of large batches of stone. Understanding its working logic, internal structure, and selection requirements helps sand and gravel plant managers select hardware configurations that suit actual operating conditions based on their output and finished product indicators during plant construction and equipment upgrades.