1, through the changes in the internal structure of the mixer, mix the material force to achieve a change of state, to prolong the time of making the ball effectively, improve the effect of making the ball purposes. 2, the use of sub-classification technology inside the machine, the use of smooth, spiral countercurrent principle of automatic classification granularity to achieve material goes out large particles, small particles of material back pelletizing purposes. 3, solve the root machine feed mixer, the mixing process to achieve dead material circulation, improve balling effect.