• 31 Aug, 2022
• By EPIC Powder
• 2 Comments

Summary of Advantages of Jet Mill in Ultrafine Pulverization

The jet mill can perform ultra-fine grinding of various professional materials, especially suitable for hard materials (Fluidized Bed Jet Mill can pulverize materials with Mohs hardness below 9), or the feed particle size is relatively fine, and the need for pollution-free high In the case of pure products. The high-speed air jet is introduced through the nozzle to spray the abrasive material, and it is combined with the integrated rotating grading wheel. Accurate and highly controllable product size can be achieved with the advantages of good particle shape and narrow particle size distribution.

Performance advantages common to all types of jet mills:

1. Low temperature and no medium grinding, especially suitable for the grinding of heat-sensitive, low melting point, sugar-containing, and volatile materials;

2. The pulverization process of the Fluidized Bed Jet Mill mainly relies on the collision between the materials themselves, which is different from mechanical pulverization which relies on the impact pulverization of the materials such as blades or hammers, so the equipment is wear-resistant and the product purity is high;

3. The whole system is closed and crushed, with less dust and low noise, and the production process is clean and environmentally friendly;

4. The particle size distribution is concentrated, and there is no over-crushing phenomenon;

5. The yield is high, and qualified products can be obtained with a small amount of principle;

6. The particle size of the product can be controlled by adjusting the intake pressure and the speed of the classification wheel.

Overview

The pulverization process of the Fluidized Bed Jet Mill takes place in the grinding chamber, and the material is driven by multiple air or steam jets at a speed close to the speed of sound in the annular chamber, without involving grinding media. The particle size reduction is the result of high-speed collisions between the particles of the material itself. The internal design of the jet mill chamber allows for the recirculation of oversized particles, thereby increasing the incidence and impact of these collisions. As particles decrease in size and gradually lose mass, they naturally migrate toward the central discharge port, allowing precise sorting to be both automated and precisely controllable.

The jet mill process involves no moving parts or screens and works with almost any brittle or crystalline material, even very corrosive materials. Because contamination is avoided and excess heat is not generated, jet milling is suitable for ultra-pure and heat-sensitive materials that must be maintained, even for cryogenic applications.