Jet Mill

A jet mill is a grinding equipment used in super fine particle size reduction. It employs compressed air, gas, or steam to grind materials to a very fine consistency, often micron or even sub-micron level.

In a jet mill, particles are introduced into a high-speed stream of gas inside a grinding chamber. The kinetic energy in the stream of gas causes interparticle collision, and as the high-velocity particles hit against each other, they break apart, creating finer particles. This process of particle size reduction is known as micronization.

Jet mill pulverization is a technology that can grind powder to micron or even nanometer particles, which plays an extremely important role in many fields.

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Spiral Jet Mill

Fluidized Bed Jet Mill

Laboratory Jet Mill

Pharmaceutical Jet Mill

Jet Mill Process

The fluid energy comes from the compressed air that has been filtered, refrigerated and dried.
This pressurized gas is forced through a series of specially designed nozzles, converting the pressure energy into kinetic energy.
The material is introduced into the grinding chamber via venturi injector.
The particles collide with each other and get pulverized under a high-speed jet stream.
The resulting fine particles leave the grinding chamber with the gas stream. The specific method may vary between Spiral Jet Mill and Fluidized Bed Jet Mill.
After the particles and the gas are separated, the micronized product gets collected in a container.
The filtered gas is vented by the extractor fan.

Jet mill diagram

1. Jet Mill Grinding Chamber	5. Compressor
2. Cyclone Separator	6. Air Tank
3. Filter Collector	7. Air Filter
4. Extractor Fan	8. Refrigerated Air Dryer

The advantages of jet mills

Jet mills offer excellent control over fine particle size distribution.
It can achieve high grinding efficiency due to the high-speed gas-solid interaction.
It is a cool process that doesn’t involve excessive heat generation.
Jet mills are typically enclosed systems, minimizing the chances of contamination.
Jet milling can be conducted using inert gases, making it suitable for handling oxidizable materials.

Jet mill FAQ

What materials are suitable for the jet mill?

Jet mills are versatile and can handle a wide range of materials, especially suitable for high value-added products. Furthermore, they can process certain chemicals, food products, pharmaceuticals, and minerals or pigments with high purity requirements.

How about the particle size range produced by a jet mill?

Typically, it can achieve particle sizes down to 1 to 10 microns. In some cases, the product fineness can be sub-micron level.

How can I adjust the particle size through a jet mill?

The particle size of the output from a jet mill can be adjusted by several key parameters:

Feed rate: Increasing the feed rate will in general result in a coarser particle size distribution.
Jet pressure: Higher jet pressures create more kinetic energy, leading to finer particles.
Classifier setting: The fluidized bed jet mill includes an internal air classifier that can be used to control the maximum particle size.

Which is better, a spiral jet mill or a fluidized bed jet mill?

The spiral jet mill has higher capacity and lower energy consumption. It is also easy to clean and maintain.

The fluidized bed air jet mill has a precision classification wheel inside, which makes it more convenient to adjust the product fineness. But it is more troublesome to disassemble and clean. Moreover, the equipment investment is also higher.

The specific machine selection depends on your needs and working conditions. We have rich experience and will provide you with a comprehensive evaluation and recommendations.

Is it possible to do a material milling test before our purchase?

Indeed. We currently offer jet milling tests with your materials. It is great for you to evaluate the process and investment.

What is the price of the jet mill?

The specific price depends on your requirements. Compared with other brand manufacturers, our equipment is very cost-effective. We also provide customized design and fabrication.

Specification of our jet mills

Type	Air consumption	Grinding pressure	Product Fineness	Capacity
AS50	0.6-0.9 cu.m/min	0.6-1.0 Mpa	D90=1-20 μm	0.1-0.5 kg/h
AS100	1.6-2.0 cu.m/min	0.6-1.0 Mpa	D90=1-20 μm	0.5-2 kg/h
AS200	4.0-5.0 cu.m/min	0.8-1.0 Mpa	D90=1-20 μm	2-30 kg/h
AS300	6.5-7.0 cu.m/min	0.8-1.0 Mpa	D90=1-20 μm	10-100 kg/h
AS350	10-12 cu.m/min	0.8-1.2 Mpa	D90=1-20 μm	30-300 kg/h
LHC150	2.5-3.0 cu.m/min	0.8-1.0 Mpa	D90=1-20 μm	0.5-20 kg/h
LHC200	4.0-5.0 cu.m/min	0.8-1.0 Mpa	D90=1-20 μm	5-40 kg/h
LHC300	6.5-7.0 cu.m/min	0.8-1.0 Mpa	D90=1-20 μm	15-150 kg/h
LHC350	10-12 cu.m/min	0.8-1.2 Mpa	D90=1-20 μm	20-250 kg/h
LHC450	20-23 cu.m/min	0.8-1.2 Mpa	D90=1-20 μm	50-600 kg/h

Jet Mill

Jet Mill Process

Jet mill diagram

The advantages of jet mills

Jet mill FAQ

Specification of our jet mills

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