Give principle construction and working of hammer mill with neat diagram.
PRINCIPLE: Impact
CONSTRUCTION:
It consists of a stout metal casing enclosing to which four or more swinging hammer are attached. The lower part of the casing consists of a screen , through which material can pass and collected in a suitable receiver , when the desired degree of size reduction is reached
WORKING:
The material is put in to the hopper which is connected with the drum. The material is powdered to the desired size , due to fast rotation of hammer and is collected under the screen . This mill has the advantage of continuous operation because of change of jamming is less as the hammers are not fixed . The mill can produce coarse to moderately fine powder.
DIAGRAM: