The ultrafine jet mill technology is an emerging science and technology developed in recent decades. It originated from the ancient traditional crushing technology, and the concept of crushing has been greatly expanded.

The definition of ultrafine powder at home and abroad is not strict. Some people define the particle size less than 100um as "ultrafine powder", and some people define the particle size less than 1um as "ultrafine powder". But the usual practice is that the powder smaller than 500 mesh (ie 30um) is called "superfine powder". This definition comes from the fact that it is difficult to crush solid materials to such a fine degree with any traditional process.

In daily life, when people describe slender things, they often say: "Thin as hair." Through the micrometer, a commonly used measuring tool in mechanical processing, we can measure the diameter of human hair. Usually 70-80 microns. Therefore, the particle size of ultrafine powder is much finer than that of human hair.

After the solid material is superfinely pulverized, its physical and chemical properties will change greatly in the micron or even nanometer scale.

For example, when the particle size of TiO2 is 20nm, the hiding power of visible light is the best, and it can be used as a high-grade paint and ink material. When the particle size is reduced to 10-60NM, it has transparency and strong ultraviolet light absorption. Can be used as high-end cosmetics and transparent coatings.

Another example is plant pollen, which is called "mini nutrition treasure house", which has a good health effect on the human body. But the pollen monomer has a hard shell and cannot be absorbed by the human body when taken directly. After the ultra-fine jet mill, the pollen wall is broken and the effective ingredients are completely released. The series of pollen products thus developed can be directly absorbed by the human body.

Utilizing the special properties of "superfine powder", it can be applied to the surface of military aircraft, ships, and tanks, and can be made into stealth aircraft, ships and tanks. In the field of aerospace, it can be made into lightweight materials and new fuels resistant to high temperature and pressure.

In the chemical industry, plastics, coatings, coatings and other industries, "ultra-fine powder" can be made into high-end new products with high strength and high adhesion.

In the fields of medicine and medical treatment, drugs are made into "ultra-fine powders." Studies have shown that the preparation can improve the dissolution of the drug and reduce side effects. Either oral or topical application can significantly improve the efficacy.

Especially in the field of traditional Chinese medicine, "superfine powder" technology can change the means of traditional Chinese medicine. After being refined by "superfine grinding", the raw materials of traditional Chinese medicine can be directly used for oral administration, eliminating the need for complicated procedures such as decoction and decoction, which greatly facilitates the patient's medication. Moreover, studies have shown that "special grade" Chinese medicine is only one-tenth of the original prescription, or even less, which can greatly save precious Chinese medicine resources, and is of far-reaching significance for improving the health of the whole people and effectively protecting the environment. In addition, through the "superfine powder" technology, effective products that are insoluble or slightly soluble in water can be broken through the cell wall, greatly improving the bioavailability of the drug and reducing toxicity. This has opened up a new path for Chinese medicine to enter the world.

In short, "Ultrafine jet mill technology" is a cross-industry emerging technology field. Since the 1980s and 1990s, it has gradually received more and more attention from research departments and industries in my country. In the future, it will make great progress in the fields of new materials, medicine, daily chemicals, health care, chemical industry, military industry, electronics, and aerospace.

Ultrafine jet mill technology

There are usually physical and chemical methods for preparing ultrafine powders. The physical method can be divided into dry method and wet method. In terms of chemical methods, it can be divided into gas phase method and liquid phase method.

In terms of physical methods, dry ultrafine pulverization can be divided into ball mills, vibration mills, jet mills, etc.; wet ultrafine pulverizers include liquid flow mills, homogenizers, etc.; in chemical methods, gas phase methods include vacuum evaporation and gas phase Chemical reaction method and plasma method. The liquid phase methods mainly include precipitation method, oxidation method and hydrocracking method, reduction method, spray drying method and freeze drying method. However, no matter what method is used, the following basic conditions must be met first:

1 The product has fine particle size and narrow distribution, which can meet the actual needs of production or scientific research.

2 The product has high purity, no impurities, no pollution, and no pollution to the environment.

three. Low energy consumption, high output, low production cost and high production efficiency.

4 The process is simple, continuous and highly automated.

5Safe and reliable production.