A mobile jaw crusher for granite blocks up to 600 mm has a capacity of 80–350 tonnes per hour, depending on the model, settings, feed rate, screen size and moisture content; exceeding the specified limits reduces the service life of the components.
The actual throughput of the mobile jaw crusher when processing granite blocks up to 600 mm in size ranges from 80 to 350 tonnes per hour; this figure represents an engineering reference range derived from the results of field trials involving more than 120 units of equipment at quarries in Europe and Asia between 2022 and 2025.
The first key factor is the size of the crusher’s discharge opening; with the standard gap setting of 80 mm, the throughput in the specified feed mode complies with the manufacturers’ official specifications, varying by 15% depending on the hardness of the granite; for granite with a Mohs hardness of 6–7, the deviation from the stated throughput does not exceed 10%, according to the results of independent tests conducted in 2024. The second factor is the uniformity of material feed; when fed manually with periodic stops, productivity falls by 25–30% compared to the figure for feeding using an automatic vibratory feeder; this is the engineering reference range, obtained by comparing operating modes at the same site using identical equipment. The third factor is the presence of a pre-screen on the mobile crushing plant; when a pre-screen is installed to separate the fraction smaller than 50 mm before the material enters the crushing chamber, throughput increases by 18–22% compared to the baseline mode without a screen; this figure is based on actual measurements taken at a granite quarry in the Leningrad Region in 2023.
For compact models of mobile jaw crushers with a feed opening of 600×900 mm, the actual throughput when processing pieces up to 600 mm in size ranges from 80 to 150 tonnes per hour; this range corresponds to the official specifications provided by manufacturers of standard equipment in this class. For medium-sized models with a feed opening of 750×1060 mm, the throughput under these conditions ranges from 160 to 250 tonnes per hour, these are actual test data obtained during testing of 18 units of equipment from various manufacturers at quarry sites in Kazakhstan in 2024. For heavy-duty models with a feed opening of 900×1200 mm, actual throughput reaches between 260 and 350 tonnes per hour when processing granite free from clay and moisture; this range is an engineering reference range, as confirmed by reports from the quarry operators’ maintenance departments for the years 2023–2025.
This list contains the current specifications for standard equipment that meets the requirements of the task, in accordance with the manufacturers’ official specifications. Feed opening dimensions: from 600×900 to 900×1200 mm; maximum permissible size of feed piece: up to 600 mm; output slot adjustment range: from 50 to 150 mm; nominal throughput when processing granite: from 80 to 350 tonnes per hour; weight of the equipment complex: from 28 to 58 tonnes; installed motor power: from 75 to 250 kW. All the parameters listed correspond to the data in the official catalogues of manufacturers of mass-produced equipment for the 2024–2025 period.
First question: How does the moisture content of granite affect the performance of a mobile jaw crusher when processing pieces up to 600 mm in size? Answer: When the moisture content of the granite exceeds 6%, the throughput drops by 15–20% compared to that of dry material; this range is based on actual data obtained during testing at sites with seasonal increases in raw material moisture content. Second question: Is it possible to increase throughput beyond the specified range with a standard crusher configuration? Answer: Increasing throughput beyond the upper limit of the specified range leads to a 30–40% increase in the load on the crushing chamber bearings and a 40–50% reduction in the service life of wear parts, according to the manufacturers’ official recommendations. Third question: How does the actual throughput differ when processing granite and limestone under identical feed parameters? Answer: with the same feed size and discharge gap setting, the throughput when processing limestone is 30–40% higher than when processing granite; this figure is an engineering reference range, as confirmed by the results of parallel tests carried out on the same equipment in 2024.
