Edge runner mill

Principle :

Crushing due to heavy weight of the stones and the shearing force which involved during movement of the stones .

1. It consist of two heavy rollers of cast iron or stones .

2. the diameter of the rollers may very fine from 0.5 to 2.5 meter .

3. the rollers are mounted vertically on a horizontal shaft .

4. the two rollers are connected by this shaft .

5. each roller revolves on its axis in a shallow circular path .

6. the pan is made up of Stone or iron .

7. the Rollers have a central shaft and they move around the pan .

8. scrappers are also provided in the pan .

1. the materials to be grounded is placed in center of the pan and is worked outward by the action of the rotors .

2. the material is continuously scrapped and thrown in the path of the moving rotor by scrapper .

3. the distance between the rotor and base of the pan is adjustable and this govern the size of the pdt .

4. Material is ground for a definite period and then passed through the sieve to get desired size .

1. very fine particle size is produced .

2. it require less attention during operation .

3. easy to clean and operate .

1. Cannot be used for sticky materials .

2. Batch Process .

3. Noise Pollution .