Yes - the return screen and return conveyor can be bypassed, and the plant can discharge all crusher output onto the main conveyor for classification by a separate static or mobile screen. Open-circuit operation is sometimes used when the downstream screen has capacity to handle the full product stream, or when two products are being blended before secondary screening.

A cone crusher is suited to hard, abrasive rock such as granite, basalt, and iron ore. It crushes by compression, producing low wear-part consumption on hard material. An impact crusher is more effective on soft-to-medium rock such as limestone and concrete rubble, producing excellent particle shape at lower capital cost, but blow bar wear increases sharply on hard abrasive feed. For granite, quartzite, or any rock above approximately 200 MPa compressive strength, the cone plant is the correct choice.

The return screen aperture directly controls the maximum particle size in the final product. Oversized material is recirculated and reduced until it passes the screen - producing a tightly graded output with minimal oversize. Aperture selection depends on the required product size; multiple deck configurations are available for plants producing two or more sized fractions simultaneously.

Blow bar life depends on material hardness and abrasiveness. On limestone, high-chromium blow bars typically run 200–400 operating hours before rotation or replacement. On abrasive material such as river pebble with silica content, expect 80–150 hours. We supply OEM blow bars in high-chrome and martensitic steel grades for all SLF and LF series crushers.

Impact crushers are optimised for soft-to-medium hardness material (compressive strength up to approximately 200 MPa) - limestone, concrete, river pebble, coal, and similar. For granite, basalt, or other hard abrasive rock above 200 MPa, a jaw or cone crusher plant is more suitable. Using an impact crusher on hard rock significantly increases blow bar wear and raises cost per tonne.

Both use the same LF250 impact crusher, 65T crawler chassis, and 500 KW generator. The AT250 Integrated features a PLC intelligent control system with a visual touchscreen, real-time parameter display, fault history logging, and engine load-adaptive speed control. The AT250 Standard uses a conventional Schneider-based panel with VFD start on the crusher motor and direct start for other motors - a simpler, more field-serviceable configuration suited to sites with experienced operators.

An optional remote monitoring module can be added to the Schneider control cabinet, providing real-time data on crusher load, conveyor speed, generator output, and fault codes via a mobile app or web dashboard. This is recommended for operations where the plant runs unattended during shift changes or in remote locations.

CSS range depends on the specific SC-series jaw crusher model fitted. As a guide, the SC96–SC120 series supports a CSS range of approximately 60–150 mm, adjustable via rear wedge while the machine is stopped. Hydraulic CSS adjustment is available as an option for applications requiring frequent product size changes.