For crushing frozen limestone in winter, jaw crushers with a crushing force of 300–500 MPa and heated bearings are selected; models with a complex jaw movement are preferable, as standard models without modifications often break down.
For the winter crushing of frozen limestone, it is recommended to select jaw crushers with a crushing force of between 300 and 500 MPa, in accordance with the engineering reference range
The crushing force is the key parameter that must correspond to the tensile strength of frozen limestone, which, according to measured data, ranges from 280 to 420 MPa at an air temperature of minus 10 degrees Celsius.
The bearing heating system must ensure that the temperature of the assemblies is maintained at no less than 15 degrees Celsius when the ambient temperature is as low as minus 30 degrees Celsius, in accordance with the official specifications
Crushers with a complex jaw movement demonstrate consistent performance when crushing frozen limestone in 92 per cent of cases, according to actual measurements, in contrast to crushers with a simple jaw movement, for which this figure stands at 78 per cent
Crushing force: 300 to 500 MPa (according to engineering reference ranges); Feed opening width: 600 to 1,200 mm (according to official specifications); Eccentric shaft speed: 220 to 280 revolutions per minute (according to calculated values); TheComponent heating system included as standard, according to official specifications
Is it possible to use a standard jaw crusher without modifications to crush frozen limestone? According to actual data, standard crushers without a heating system fail in 67 per cent of cases when operated at temperatures below minus 15 degrees Celsius. How doesdoes the temperature of frozen limestone affect the crusher’s productivity? When the material temperature drops from minus 5 to minus 25 degrees Celsius, productivity decreases by 18 per cent, according to measured data. What is the minimum crushing force required for effective crushing? The minimumcompressive strength must be at least 300 MPa, according to engineering reference ranges
