The feeding device of air mill generally has high-pressure gas suction, screw feeding and screw feeding. Therefore, there are two kinds of common airflow crushers: closed-circuit circulation type and flat type. The high-speed gas flow formed by mixing the high-pressure gas (compressed air, superheated steam or other gas) injected around the crushing chamber with the solid material particles is constantly impacted tangentially by the gas flow injected from different angles, so that the solid particles in the mixed gas flow are refined by mutual impact and friction.
The main component of the airflow crusher is a vertical turbine classifier as standard. The crushing and classification are completed synchronously with each other. The product fineness can be adjusted arbitrarily by adjusting the rotating speed of the classifier through frequency conversion. If a processing process requires products with multiple particle size segments, two to four can be added on the basis of one classifier as standard, so as to make the machine become a two connected machine - five connected machine for crushing and grading.
The application scope of airflow crusher. The crushing mechanism of airflow crusher classifier determines its wide application range and high fineness of finished products. Typical materials include superhard diamond, silicon carbide, metal powder, etc., high purity requirements: ceramic pigment, medicine, biochemistry, etc., and low temperature requirements: medicine and PVC. By changing the ordinary air in the air source part into inert gases such as nitrogen and carbon dioxide, the machine can become an inert gas protection equipment, which is suitable for crushing and grading processing of flammable, explosive, easily oxidized and other materials.
The advantage of air flow pulverizer is that it does not heat up, and is especially suitable for ultra-fine pulverization of heat sensitive materials. In this regard, another form that the laboratory should consider when developing new materials is to use cold air to cool the mechanical pulverization, compare its pulverization performance and the feasibility of the process, because in the actual large-scale production, For many problems that can be solved by mechanical crusher, try to use mechanical crushing. Often, the energy consumption of air mill is very high. The pollution is small, because the crushing principle is the collision crushing of materials. Compared with other crushing forms, the blade or ball milling will bring in other grinding media. Compared with other grinding forms, the air flow crusher is a crushing process with the least pollution, so it is especially suitable for the pharmaceutical and food industry. It is easy to clean. Compared with other ultra-fine pulverizers, the internal transmission parts of the air flow pulverizer are relatively few. In particular, the spiral air flow pulverizer has the advantages of simple structure, easy cleaning and no dead angle. It can be used for crushing sterile drugs.