Jet milling combines turbulent, free jets with high-efficiency centrifugal air classification in a single housing to achieve dense phase micronization. This combination enables for better comminution resulting in a high chance of particle-on-particle contact for breakage and a greater standard of particle dispersion for better separation.
Working Process
A double flapper valve or an injector is used to feed raw material into the common housing. Flooding the pulverizing zone to a level above the grinding nozzles creates a mill load.
The particles are accelerated for collision and fracture using free-flowing, turbulent jets. The fluid and size-reduced particles exit the bed after impact and ascend to the centrifugal classifier.
The rotor speed determines which sizes pass through the rotor and which are rejected and returned to the particle bed for further size reduction. The high degree of particle dispersion leaving the pulverizing zone aids in the removal of fine particles efficiently.
There are several industries geared toward for Jet milling:
- Automotive and Aerospace
- Additive Manufacturing
- Chemical Industry
- Petrochemical Industry
- Industrial Materials
- Micro Electronic
- Personal and Beauty Care
Quality of material that works best for jet milling.
Jet milling works well with most ceramics, glass, abrasives, minerals, and polymers, particularly those used in 3D printing applications. It is also an excellent process for toners, powder coatings, and other fine powder applications. If you’re unsure whether your particular feed will be a good fit, here are some material properties to consider.
Suitable materials for jet milling
- Materials with a high density
- Abrasive substances
- Materials that abrasion
- Materials with a tendency to break
- Material that is easily broken
- Crack-propagating materials that react to impact
Not – suitable materials for jet milling
- Materials that are slightly damp
- Lumpy or tangled up materials
- Stretchy materials
- Materials that are deformed
- Material that is light and/or fluffy
- Impact-absorbing and slow-moving materials
Procedures required in buying jet milling equipment
The steps involved in making a purchase are as follows:
1. Compile preliminary product/material data.
2. Run a test to see if it’s possible and how much throughput you’ll need (recommended)
3. Get a budgetary quote and a purchase order for the first time.
4. Collaborate with our engineers to determine the exact system parameters.
5. Obtain a final quote as well as a purchase order
6. The system is custom-built to meet the specifications.
Benefits of Jet Mill Over Another Milling Method
A Jet mill has the main benefits of grinding a crystalline or crystalline material at an average size of 1 – 10 microns over other types of mills, and at the same time classification into a very small particle size. It is not possible to wear or generate heat in a jet mill, and there are no screens to be plugged or punctured. The cooling effect of the jets prevents attritional heat.
Promas jet mill can be used for a variety of tasks in addition to size reduction. Blending powders is a significant secondary application for jet mills. Two or more streams of material can be fed into the jet mill simultaneously, resulting in a flawless uniform blend at the output. A product can also be coated or blended with another. Liquid additives have been injected under pressure through one or more atomizing spray nozzles into the grinding chamber, the primary grinding air inlet, or the mill exit vortex in some cases. The jet mill can also be used to smooth the sharp edges of particles to help them flow or compress better.
