The Theory Analysis And Experimental Study On The Special Type Grinding Chamber Of Hammer Mill

The materials-air circulation is existed in the ginding chamber of hammer mill when grinding materials.It led to lower production ,higher consumption of energy and particle inhomogeity.Aiming at materials-air circulation ,the special type grinding chamber that is made up of trapezium screen was proposed. It can destroy circulation lay effectively and raise grinding capbility.The movement of materials in the special type grinding chamber is analysed by the theory of gas-solid. And grindintg experiment based on uniform design is conducted.Depending on data process system,the regression model of production efficiency, output per degree and particle are established.Through single factor analysis on all experimental indexes,the law that the bottom corner ,height, bottom length of trapezium and spacing influence the hammer mill capbility are achieved. The results show,the special grinding chamber made up of trapezium screen can improve grinding capability.This study has provided a basis on grinding mechanism for the further research and the improved design of hammer mill.