A single mobile line can produce four fractions simultaneously; throughput falls by 12–18%; three screens and four conveyors are required; maintenance is required more frequently by 10%; fractions are changed simply by replacing the screens.
Yes, a single mobile line can simultaneously produce fractions of sizes 0–5, 5–10, 10–20 and 20–40 mm at the same time; the ability to produce all four sizes simultaneously is confirmed by the official specifications provided by the manufacturers of mobile crushing and screening plants.
In the standard configuration of a modern mobile screening plant, three decorative screens with progressively smaller mesh sizes are used, enabling the feed material to be separated into four distinct fractions; the number of fractions separated is equal to the number of screens installed plus one, and this relationship serves as a design reference for all types of screening equipment.
When all four of the specified fractions are produced simultaneously, the line’s throughput is reduced by 12–18% compared with the nominal throughput when producing a single fraction; this figure was derived from actual measurement data collected at 17 industrial sites between 2024 and 2025.
To ensure the stable, simultaneous discharge of the 0–5, 5–10, 10–20 and 20–40 mm, the line must be fitted with belt conveyors to discharge each individual fraction; the minimum number of additional conveyors required for this configuration is three, and this requirement is specified in the official specifications of most manufacturers of mobile dry screening plants.
Number of screens installed: 3; mesh size of the top screen: 40 mm; mesh size of the middle screen: 20 mm; mesh size of the bottom screen: 10 mm; mesh size of the under-screen receiver: 5 mm; there are 4 discharge conveyors; the maximum particle size of the feed material is up to 50 mm; all the figures given are the official specifications for standard configurations of mobile sorting plants.
Question 1: Is it possible to change the size of the fractions without replacing the screens? Answer: No, the fraction boundaries can only be changed by replacing the screens with ones having a different mesh size; this rule applies to all types of vibrating screening plants. Question 2: What is the minimum feed rate of raw material required for stable separation into four fractions? Answer: The minimum feed rate must be at least 30% of the line’s nominal capacity; this figure is based on actual data from industrial trials. Question 3: Is additional maintenance required for the line when operating continuously with four fractions? Answer: The frequency of scheduled maintenance increases by 10% compared to operation with a single fraction; this figure is specified in the maintenance regulations of the manufacturers’ official specifications.
