working principle of Milling system
Milling system consist of three main parts: pneumatic transportation, grinding mill,plansifter.
The function of pneumatic transportation is to transit work-in-process materials between grinding mill and plansifter by pipes;
Grinding mill is used for further breaking materials by extrusion force between two rollers. Meanwhile the surface of rollers possess small oblique groove which is used for breaking maize and getting flour.