Selection strategy of jet mill

With the development of material refinement and high purification, grinding technology is also constantly improving. As the finest grinding equipment in dry grinding, jet mills have more types. So how do you choose?

It is necessary to know the structure and principle of the main jet mills on the market. According to the structure, the models are mainly divided into (the control granularity is arranged from coarse to fine): disc jet mill, fluidized bed vertical jet mill, fluidized bed horizontal jet mill, superheated steam jet mill.

After clarifying the equipment classification, it is necessary to clearly understand the applicable industries of each model.

1.   The disc type jet mill, because of its simple structure, easy to disassemble and clean, meets the requirements of clean production, and is mainly used in the fields of medicine, food, and health products.

2.  Fluidized bed vertical jet mill is mainly suitable for mass production, such as: chemical industry, minerals, abrasives, refractory materials and other general industries.

3.  Compared with the vertical type, the fluidized bed horizontal jet mill is installed horizontally with the grading impeller, which can achieve the purpose of controlling fine particles, and is suitable for the production of refined needs in various industries.

4.  Steam jet mill, a model that replaces air compressors, saves energy, reduces consumption, and promotes flow. It is suitable for special industries such as fly ash, slag, barium sulfate, titanium dioxide, talc, white carbon black, aerogel, etc. .

Secondly, it is necessary to distinguish the fineness that can be achieved by each model of the jet mill.

1.  Disc jet mill, 200 mesh-5μm, the finer the particle size, the lower the productivity.

2.  Fluidized bed vertical jet mill, 200 mesh -3μm, the finer the particle size, the lower the production capacity.

3.  Fluidized bed horizontal jet mill, 200 mesh -1μm, the finer the particle size, the lower the production capacity.

4.  Steam jet mill, 200 mesh -0.5μm, the finer the particle size, the lower the productivity.

However, generally below 500 mesh, it is recommended to use a mechanical pulverizer. The main consideration is that its production cost is acceptable. The energy consumption of the jet pulverizer is relatively high, but the industries with high added value can be ignored.

Furthermore, the choice is based on the characteristics of the raw materials, such as the viscosity, toughness, fluidity, ductility, moisture absorption, easy oxidation, combustibility and other characteristics of the material will affect the selection of equipment, and it is necessary to communicate with professional and technical personnel in detail and listen. Their suggestions.

Finally, jet mills, especially fluidized bed jet mills, have a variety of grading impellers, which will also affect particle size, output, and particle shape. When selecting equipment, communicate with technicians.