Process for the production of finest particles and jet mill therefor and air classifier and operating method thereof

摘要

The present invention relates to a method for producing finest particles by means of a jet mill (1) with an integrated dynamic air classifier (7), wherein the rotational speed of a classifying rotor (8) of the air classifier (7) and the internal amplification ratio V (= Di / DF) be selected, adjusted or regulated that the peripheral speed of the operating means (B) on a the Sichtrad (8) associated dip tube or outlet nozzle (20) reaches up to 0.8 times the speed of sound of the operating medium (B). Furthermore, the invention provides a jet mill (1) with an integrated dynamic air classifier (7) for producing very fine particles, wherein the rotational speed of a classifying rotor (8) of the air classifier (7) and the internal amplification ratio V (= Di / DF) are selected or adjusted or that the peripheral speed of the operating means (B) at a dip tube or outlet nozzle (20) associated with the classifying wheel (8) reaches up to 0.8 times the speed of sound of the operating medium (B). The invention further provides a dynamic air classifier (7) with a classifying wheel (8), wherein a source (tank 18a) is associated with a resource (b) having a higher velocity of sound than air (343 m / s). Finally, an operating method for an air classifier (7) with a classifying rotor or wheel (8) is provided, wherein as the means of operation (B) a fluid, in particular gases or vapors, is used, which ...