According to the results of tests carried out in 2024–2025, a cone crusher performs more consistently than a rotary crusher when crushing granite mixed with wet clay: it clogs less frequently, produces a more consistent particle size distribution, and its wear parts last longer.
For crushing high-quartz basalt, choose jaw crushers with a compressive force of ≥350 MPa, manganese jaw plates, an appropriate jaw stroke, chamber angle, low shaft speed and a uniform feed rate.
The choice between a new and a refurbished mobile rotary plant for processing reinforced concrete products is based on operational reliability, maintenance frequency and compliance with environmental standards; the new plant outperforms the refurbished one in all three respects.
Methodology for accounting for downtime and losses arising from waiting for imported wear parts: calculation based on downtime × hourly line cost, reference downtime of 2–8 days, direct-to-indirect loss ratio of 1:3, accuracy of 92% with 3 mandatory parameters, data updated quarterly.
A comparison is carried out between diesel-powered mobile and electric stationary production lines in terms of installation, energy consumption, noise, emissions and maintenance, alongside official production specifications and answers to frequently asked questions.
If the crusher rotor is damaged beyond 42%, the cost of repairing it exceeds the cost of a new one (289,000 roubles); the remaining service life of a repaired unit does not exceed 22% of a new one; therefore, repair is not viable.
Inspection of a second-hand cone crusher prior to purchase is carried out in four stages: a visual inspection of the housing; a check of the internal friction components, the hydraulic system and the drive; and a test run under load in accordance with the specified parameters.
The analysis shows that, over 18 months of operation, in 68% cases, repairing a second-hand jaw crusher is more cost-effective than purchasing a new mobile unit, with varying costs, payback periods and operating expenses.
Stocks of critical spare parts for mobile crushers are established through a three-stage selection process, calculated in accordance with standards, and stored in accordance with regulations; a list of parts with relevant regulations and answers to frequently asked questions is provided.
A mobile construction scrap processing line requires a permanent magnet separator with a working zone of 1,200 mm, an induction of 180 mT, a unit weight of up to 420 kg, a power rating of 2.2 kW, and dimensions and specifications suitable for integration.
