Good flow of granular solids is mainly by the rotation of the container itself, or by moving in the container the role of moving parts, repeatedly flip, blending to be mixed, such materials can also use airflow to produce convection or turbulence to achieve mixing . Solid particles convection or turbulence is not easy to produce vortex, mixing speed is much lower than the liquid mixture, the degree of mixing can only reach a random mixture. Poor mobility, the occurrence of adhesion to each other particles or powdery solid, often with a mechanical flip and press, rolling and other actions of the hybrid machinery. Common mixer are: horizontal pear knife mixer, ribbon mixer, no gravity mixer, V-type mixer, double helix cone mixer, etc.