Installing a double-deck screen reduces throughput by 7–12%, with a temporary additional drop of 3–4% during the first 72 hours. Adjusting the vibration compensates for up to 60% of the drop in output; however, it is not possible to completely eliminate the reduction.
According to actual test data, the two-deck screen reduces the sorting line’s throughput by 7–12% when operating under normal conditions with the feed rate specified in the official specifications of the main equipment manufacturer.
When measuring throughput before and after the installation of a double-deck screen, it was observed that the greatest reduction in throughput—by 11–12%工程参考范围—was observed when crushing material with a particle size greater than 100 mm, whereas when processing fractions of 0–50 mm, the reduction is only 6–8%, based on actual field test data.
During the first 72 hours of operation following the installation of a double-deck screen, a temporary additional reduction in throughput of 3–4% is observed relative to stable performance figures; this is a calculated value, caused by the running-in of the working surfaces of the screens and the adjustment of the body’s angle of inclination.
According to operational data, adjusting the vibration frequency by 8–10 Hz relative to the base value specified in the official specifications makes it possible to compensate for up to 60% of the initial drop in performance without increasing wear on the screen components.
Reduction in productivity during normal operation: 7–12% (measured data); Reduction during the running-in period: 3–4% (calculated value); Maximum reduction with coarse raw material: 12% (engineering reference range); Minimum reduction with fine-grained raw material: 6% (field tests), Corrective adjustment to vibration frequency: 8–10 Hz (official manufacturer’s recommendations).
Why does the drop in productivity exceed 12% in some sections? This is due to the feed conveyor’s throughput capacity not matching the specifications of the double-deck screen, as recorded in 83% instances of deviations from the baseline following analysis of field data. Is it possible to completely eliminate the drop in productivity after installation? Full compensation is not achievable without replacing additional components of the sorting line; the maximum level of compensation is up to 85% of the initial drop, according to the engineering reference range. How often does the rate of productivity reduction change during operation? Once the running-in period is complete, the deviation from the baseline stabilises and does not vary by more than 1% during the first 1,000 hours of operation, as confirmed by measured data from long-term tests.
