Breaking is the process of turning large pieces of material into small pieces. In this process, external forces (human, mechanical, electrical, chemical, atomic, or other methods) are applied to the fractured material. When the external force exceeds the strength limit of the fractured material, the bulk material splits into small pieces. Piece. The ore is a brittle material that breaks under very small deformations. 1. Crushing (Fig. a) The ore is placed between two fractured surfaces. After applying pressure, the ore is broken by the stress reaching its compressive strength limit. Steel Frame Machine is used to make the steel frames, the skeleton frame, the vertical steel columns and metal horizontal i beams, and retangular grid, to support the floors and roof.There are Omega frame Roll Forming Machine, L corner bead wall protector roll forming machine, c track frame roll forming machine and u stud frame rol forming machine, and T bar frame roll forming machines. Steel Frame Machine Steel Frame Machine,Roll Forming Machine,Gypsum Board Profiles Rollformer,Switch Gears Roll Forming Machine WUXI ZHONGTUO ROLL FORMING MACHINERY CO LTD , https://www.rollformertec.com
At present, the ore dressing industry mainly relies on mechanical force to break the ore. The method of using mechanical force to break the ore is as follows: 
2. Crushing (Fig. b) When the ore is pressed with a flat surface and a sharp-edged working surface, the ore will split along the direction of the pressure line of action. The reason for the splitting is that the tensile stress on the splitting plane reaches the tensile strength limit of the ore. The tensile strength limit of the ore is much smaller than the compressive strength limit.
3. Fracture (Fig. c) The ore is destroyed by bending. The broken ore is a two-point or multi-point beam that is subjected to concentrated loads. When the ore is subjected to a bending stress that reaches its bending strength limit, the ore is broken.
4. Grinding (Fig. d) After the ore and the moving surface are subjected to a certain pressure and shearing force, the ore is crushed when the shear stress reaches the shear strength limit of the ore. Grinding is suitable for the crushing of fine materials, but the grinding efficiency is low and the energy consumption is large.
5. Crushing (Fig. e) The ore is broken by the impact of the high-speed rotary machine. Its crushing force is instantaneous, its crushing efficiency is high, the crushing ratio is large, and the energy consumption is small.
In fact, any type of crusher and grinder can not be crushed by only one of the methods listed above, and is generally broken by a combination of two or more methods. Such as crushing and breaking, impact and grinding.