A 5–20 mm crushed stone production line is essential for construction and roadworks; its configuration is tailored to the raw material, capacity and purity of the fraction. Factors taken into account during selection include rock hardness, throughput of 10–500 tonnes per hour, and separation accuracy. Specialised equipment reduces the need for spare parts replacement by 40–60% and electricity consumption by 15–25%. Common mistakes include cutting corners on screening and ignoring the need for increased capacity.
The production line for 5–20 mm crushed stone is a key component for construction and road projects; the optimal configuration is selected based on production capacity, the characteristics of the raw material and the required purity of the fraction, whilst specialised equipment ensures stable operation, low resource consumption and a high yield of the target product without unnecessary impurities.
When designing a process flow diagram, the hardness and size of the feed rock are taken into account first; for soft limestone, a process involving a jaw crusher in the first stage and a rotary crusher in the second is suitable, whereas for hard granites, the rotary crusher is replaced with a cone crusher; the required throughput—ranging from 10 to 500 tonnes per hour—and the precision of fraction separation are then specified to prevent oversize particles in the finished product.
Specialised units are designed for continuous operation in harsh conditions and feature reinforced components that are resistant to abrasive wear, which reduces the frequency of spare part replacements by 40–60% compared with general-purpose machines, whilst integrated automation systems regulate operating modes in real time, eliminate downtime and reduce electricity consumption per tonne of finished crushed stone by 15–25%.
Most often, customers cut corners at the preliminary screening stage of the raw material, which leads to rapid wear and tear of the crushing units and a reduction in the yield of the target fraction; they also frequently select equipment without taking into account the prospect of increasing throughput, which means that after 1–2 years they have to completely rebuild the line instead of installing additional modules.
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