The medium and fine crushing cone crusher is also known as circular grinding, its working principle is similar to the coarse crushing cone crusher, but there are large differences in the structure, the differences are as follows: (1) The cone of the coarse crushing cone crusher machine is steeply inclined, the inclination angle is large, the dynamic cone is being set, but the set cone is inverted, to adapt to the needs of mining block degree. The cone of the medium and fine cone crusher is low-angle, its inclination angle is small, its two cones are both being set. (2) The dynamic cone of the coarse crushing cone crusher is suspended from the beam through the spindle, but the dynamic cone of the medium and fine crushing cone crusher is supported on spherical bearings. (3) The adjustment of the port of discharge of the coarse crushing cone crusher is to adjust the dynamic cone, but the adjustment of the port of discharge of the spring-type medium and fine crushing cone crusher is to adjust the set cone ( Multi-cylinder hydraulic type is also to adjust the fix cone, but the single-cylinder hydraulic type is to adjust the dynamic cone).