Materials with bulk densities below 200 kg/m³ can be a challenge for mechanical processes. Especially grinding of very fine products can change the basic conditions in jet mills significantly. A big potential for process improvements can be expected when the individual properties of such products are considered. This investigation reviews the effects/influences of the main jet milling parameters, with special focus on low-density products. The aim was to transfer all positive results into a special mill/plant design for such products.
Although the jet mill principle with opposed jets was invented over 140 years ago,1 its evolution is not over yet, and the technology can be improved even further.