JetMühlen

JetMühlen is the German term used for jet milling systems, a class of powder-processing equipment that grinds materials by employing high-velocity jets of compressed gas to collide and fracture particles. Unlike mills using grinding media, jet mills rely on particle-particle and particle-wall interactions within a closed chamber to achieve fine powders, typically in the micron range.

Operating principle: The feed material is entrained in a jet of compressed gas, often air or an inert gas. The jet accelerates particles toward a grinding zone where collisions and abrasive effects reduce particle size. A classifier loop then separates fines from coarser material, re-circulating the latter back to the grinding zone. The process is carried out in a contained milling chamber connected to a cyclone separator and dust control system.

Capabilities and advantages: JetMühlen can produce very narrow particle size distributions and very fine powders while minimizing contamination because no grinding media is used. They are suitable for heat‑sensitive or easily oxidized materials and can handle brittle or fibrous substances. They are scalable from laboratory to production and can be operated under inert atmospheres.

Applications and safety: Industries include pharmaceuticals, chemicals, pigments, catalysts, and food ingredients. Because of handling of fine powders, explosion protection and dust control are essential, with compliance to ATEX directives and GMP in relevant sectors. Regular cleaning and validated processes are required for regulated products.