Mobile Jaw Crusher 250 with Rotary Screen: A Compact Solution for On-Site Crushing and Screening
The mobile jaw crusher 250 with a rotary screen is a self-contained, diesel-powered crushing and screening unit designed for small to medium-scale operations. Its core components—a jaw crusher with a nominal feed opening of approximately 250 mm (typically the PE‑250×400 model) and an integrated rotary trommel screen—allow it to process raw material into two or three graded fractions in a single pass. This combination eliminates the need for separate screening equipment and reduces material handling, making it particularly effective for recycling construction debris, processing low-abrasive quarry stone, and producing base aggregates in remote or temporary worksites.
Design and Configuration
The unit is mounted on a single chassis with pneumatic tires or tracked undercarriage, enabling rapid relocation between job sites. The feeding system usually consists of a vibrating grizzly feeder or a belt feeder that meters material into the jaw crusher. The crusher itself features a fixed jaw plate and a movable jaw plate, creating a V-shaped crushing chamber. With an inlet size of 250 mm × 400 mm (width × length), it can accept rocks up to about 200–220 mm in diameter, depending on the closed-side setting (CSS). The CSS can be adjusted hydraulically or mechanically from roughly 20 mm to 80 mm, allowing the operator to control the final product size.
After primary crushing, the material is discharged onto a conveyor belt that feeds directly into the rotary screen. The rotary screen—often called a trommel—is a cylindrical drum perforated with holes of various diameters (e.g., two decks: one with Ø20–30 mm holes for fine material and another with Ø50–70 mm holes for medium fractions). As the drum rotates slowly (typically between 10 and 20 rpm), smaller particles fall through the apertures while larger oversize material exits at the end of the drum. This design is particularly effective when dealing with damp or sticky materials because there are no vibrating decks that could clog; instead, tumbling action helps break up clumps.
Performance Characteristics
A typical mobile jaw crusher 250 with rotary screen has an output capacity ranging from about 10 to 40 tonnes per hour, depending on feed size, CSS setting, and material hardness. For example, crushing concrete rubble at CSS =40 mm can yield around 25 t/h of minus‑40 mm product. The power source is usually a diesel engine rated between approximately kW (e.g., Deutz or Cummins engines in the range) driving both the crusher via V-belts and hydraulic pumps for conveyors and screen rotation. Fuel consumption varies but typically falls between liters per hour under full load.
One notable advantage over conventional mobile plants that use vibrating screens is that rotary screens handle wet clayey materials more reliably without blinding. However, they are less efficient at fine screening below about Ø10 mm due to particle adhesion inside the drum; therefore this configuration is best suited for producing coarse aggregates like road base or drainage stone rather than fine sand.
Applications
This machine finds its niche in small quarries where production volumes do not justify larger stationary plants; in demolition waste recycling yards where mobility allows quick setup near demolition sites; and in infrastructure projects such as rural road construction where aggregate must be produced locally from river gravel or weathered rock. Because it combines crushing and screening on one chassis, it reduces trucking costs significantly—material can be processed right at the source.
Operators should note that while maintenance is straightforward (greasing bearings daily checking wear plates weekly), replacing jaw liners every hours depending on abrasiveness) requires some downtime but no specialized tools beyond standard wrenches.jpg)
Economic Considerations
For contractors looking at total cost of ownership this unit offers lower initial investment compared to larger tracked plants yet still provides independence from grid power Its fuel consumption per tonne produced remains competitive especially when compared to renting separate crushers screens Additionally its compact footprint means it can operate within confined spaces such as urban demolition sites without blocking traffic
In summary mobile jaw crusher equipped with rotary screen delivers reliable primary reduction plus immediate classification making it practical choice for many mid scale applications where flexibility simplicity matter more than ultra high throughput