Fluid Energy Mill , ( jet mill , Ultra fine Grinder )

Principle :

Impact and attrition . feed is Suspended within a high velocity air stream .

1. Elliptical pipe which has a weight of about 2 meter and Diameter 20 - 200 mm .

2. Tube is made up of Stainless Steel .

3. Fluid nozzels ( 2-6 ) may be placed opposed to the initial flow path of the powder .

4. Compressed Air - 600 kilopascals to 1 megapascals .

1. turbulent stream of air suspended the particle colloid with each other and break .

2. The formed small particles are carried to outlet and removed by filter .

3. Coarse particles undergo recirculation .

1. No Moving part , so no heat production .

2. Thermolabile substances can be milled

Example :- antibiotics and vitamins

1. Not Suitable for soft and Fibrous materials .

2. Equipment is Expensive .