Jet milling is a process that uses high-pressure air or gas to pulverize materials into fine particles. The jet mill works by accelerating particles in a swirling motion, using compressed air or gas to produce high-velocity collisions. The resulting particles are then collected in a collector or baghouse.
The process of jet milling involves several stages, including feed material preparation, milling, and classification. The feed material is typically pre-ground to a smaller size before being introduced into the jet mill. This helps to ensure that the particles are uniform in size and shape, which is important for achieving consistent results.
Once the feed material is prepared, it is fed into the jet mill through a feed inlet. The jet mill uses a high-pressure stream of air or gas to create a vortex within the milling chamber. This vortex causes the particles to collide with each other, resulting in the reduction of particle size.
As the particles are reduced in size, they are subjected to further collisions and shearing forces, which causes them to become even smaller. The jet mill can produce particles as small as a few microns in size, making it ideal for applications that require ultra-fine particle sizes.
After the particles have been reduced in size, they are separated from the air or gas stream using a classifier. The classifier works by using centrifugal force to separate the particles based on their size and density. The larger particles are collected in a separate chamber, while the smaller particles are sent to a collection bag or bin.
In conclusion, jet milling is a highly efficient and effective method for producing fine particles. The process works by using high-pressure air or gas to create a vortex within the milling chamber, which causes particles to collide and reduce in size. The resulting particles are then separated using a classifier, producing uniform and consistent particle sizes.