Broken is the scattered material particles’ size decreases and the shape change process, whose the purpose is generally divided into : preparing raw materials for further processing, and easy to transport, storage and provide products. With the continuous progress of science and technology, material crushing methods also made great progress, but generally will be divided into mechanical forces and non-mechanical force.

Mechanical forces are generally divided into:

1. Squeeze broken
Extrusion crushing is to put broken material between two working surfaces, at the slowly increased pressure, the materials are gradually squeezed and crushed, which is the most common method.
2. Impact crusher
Impact crusher is very important for the working of crushing, because the broken machinery’s working parts are at a certain velocity, therefore, breaking is carried out in motion. Thus the essence of impact is not the function of absolute squeezing crush, conversely, the impact crushing.

3. Grinding broken
Materials are moving between metal surfaces or different types of grinding media, materials are broken by abrasive action and mutual crushing function.

4. Splitting broken
Owing to the operation of the wedge block materials, the material blocks are broken, the materials in jaw crusher are crushed and split by the liner plates prongs.

5. Curved broken
Materials are crushed by the bending force in two or more of the fulcrum’s intermediate parts. Common non-mechanical forces are: blasting crushing, sonication, thermal fragmentation, high frequency electromagnetic waves breaking, crushing effects of hydropower, hydraulic fracturing etc.

In the actual production, the crusher is comprehensive methods of several broken methods. Such as: compound pendulum jaw crusher is adopting extrusion, impact, splitting and grinding to crush materials; cone crusher is adopting impact, crush, bend and grinding to crush materials; Roll crushers break materials by extrusion and grinding; hammer crusher is adopting impact, squeezing and grinding function to crush materials; Impact crusher adopts impact and grinding function to crush materials; cage crusher uses impact, extrusion, grinding and splitting function to crush materials; ball mill and rod mill adopts impacting, crushing, grinding and splitting functions to crush materials; Vibrating mills use high-frequent shock, vibration and grinding to crush materials; airflow milling machine to use impact and grinding function to crush materials.