After feeding the material by elevator to second hopper it has been send to hammer mill. Hammer mill is the machine which can express by its name, Hammer mills are used for grinding almost all types of free flowing materials. Hammer mills operate on the principle that most of materials will grind or crush upon the impact of swinging hammers. The material is feed in to hammer mill from the top and falls in to grinding chamber by gravity. The material is contacted by series of rotating hardened hammers. Hammers are made up of magnise, which are hardened up to required hardness. Repeated contact with hammers; contact with the walls or screens of the grinding chamber and particle-to-particle contact grind the material. The material remains in grinding chamber until it is suitably sized to pass through perforated screen applied.