1.Calculation size reduction ratio with the largest size of crushing material and the largest size after broken
- Dmax is the biggest granularity of material before broken
- dmax is the biggest granularity of material after broken
2.Calculation size reduction ratio with effective width of the crusher feeding mouth and the discharging mouth width
- B – crusher feeding mouth width
- b – crusher discharging mouth width
- 0.85 is the width to ensure the crusher biting material effective and is expected
Discharging mouth width value of regulation:
- The coarse crusher for the maximum discharging mouth width
- The middle-sized crusher for the minimum discharging mouth width.
3.Calculation size reduction ratio with an average particle size
- Dcp is the average diameter of the material
- dcp is the average diameter of after the materia
Size reduction ratio obtained by this method, can more truly reflect the degree of sand and gravel equipment broken.