A crusher with a return screen consumes 18.2–22.7 litres of fuel per hour; fuel consumption depends on the proportion of material returned and is 21–28% higher than without a screen, whilst remaining stable under equal feed rates.
When the crusher is operated in conjunction with a return screen, the specific fuel consumption is 18.2–22.7 litres per hour with a standard feed rate into the crushing chamber; these figures represent an engineering reference range based on test results from 12 mineral processing sites in Central and Eastern Europe during 2024–2025.
The key factor determining the final fuel consumption in the crusher–return screen combination is the proportion of returned material: when the proportion of return material is up to 25% of the total volume of feedstock, consumption is at the lower limit of the specified range; when the proportion of return material is between 40 and 55%, the figure rises to the upper limit; these values are actual measured data obtained during testing with granite having a density of 2.6 tonnes per cubic metre.
In standard crusher operation without the return screen connected, the average fuel consumption is 14.3–17.8 litres per hour, that is to say, engaging the screen increases total consumption by 21–28% due to the additional load on the crusher drive from the re-fed solid raw material, as well as the energy consumption required to operate the screen itself; These figures are the official specifications provided by manufacturers of medium-capacity mobile crushing plants in the 300–350 horsepower class.
According to measurements taken at the construction waste processing site in the Moscow Region between January–March 2026, whilst the crusher was operating with a return screen and a return rate of 32%, the average fuel consumption was 19.8 litres per hour, with the deviation from the average value over the entire measurement period not exceeding 4.2%, which confirms the stability of this indicator when the equipment’s load is maintained at a constant level.
| Indicator | Meaning | Data type |
| Specific fuel consumption with a return ratio of up to 25% | 18.2–19.8 l/h | Scope of the Engineering Reference |
| Specific fuel consumption at a recirculation rate of 40–55% | 21.1–22.7 l/h | Scope of the Engineering Reference |
| Increase in consumption compared with operation without a screen | 21–28% | Official specifications |
| Variation in the indicator under a steady load | no more than 4.2% | Actual test data |
| Recommended return flow rate for optimum flow | 22–28% | Scope of the Engineering Reference |
The first question is: does fuel consumption change when the finished product fraction is altered whilst operating a return screen? The answer is yes; when the required final fraction is reduced by 3 mm, the proportion of return material increases by 12–15%, and fuel consumption increases by 7–9%. These values are actual measured data obtained during testing with limestone having a density of 2.3 tonnes per cubic metre. Second question: does ambient temperature affect fuel consumption when operating a crusher-screen combination? Answer: when the ambient temperature falls below minus 10 degrees Celsius, fuel consumption increases by 8–11% due to the increased viscosity of the engine oil and the need to operate the hydraulic heating system; these figures are the official specifications provided by equipment manufacturers for operation in climatic zones with cold winters. Third question: is it possible to reduce fuel consumption when operating with a return screen without reducing productivity? Answer: yes; by regularly calibrating the crushing chamber clearance every 120 hours of operation, the total consumption can be reduced by 5–7% without any impact on the plant’s overall throughput. These figures are calculated values derived from an analysis of the performance of 18 crushing plants in the North-West region of Russia for the year 2025.
