Hammer Milling and Jet Milling Fundamentals | AIChE
WEBJun 3, 2017 · A hammer mill is typically good for grinding softer materials with Mohs hardness ranging from 1 to 5, while a jet mill can grind materials with Mohs hardness as high as 10. High hardness materials become very abrasive; therefore, they are not suitable for highspeed hammer mills.