SU1235524A1 - Centrifugal mill - Google Patents

Description

The invention relates to devices for the fine grinding of various materials.

The purpose of the invention is to increase the grinding efficiency and reduce overall dimensions.

FIG. 1 shows a centrifugal mill; FIG. 2 shows section A-A in FIG. one. . The centrifugal mill contains loading and unloading 2 nozzles, a cylindrical body 3 with concentric annular inserts 4, inside of which there is a stepped disk rotor 5 with beaters 6, equipped with annular drip thresholds 7 of conical shape. Dampers 8 are provided on the inner side of the housing and annular inserts.

The mill works as follows.

The source material through the loading nozzle 1 enters the housing 3, where it is crushed in the first 20 steps by the rotating rotor 5. The particles of the material are carried to the next stage by air flow, where they are evenly distributed along the step 7 its upper zone. Further, the material 25 is processed at the second stage, crushed to smaller sizes, and then fed to the last stage, where

0 5

The process is repeated. The ground material is removed from the mill through a discharge nozzle 2.

An increase in the length of beat 6 at each subsequent step along the material contributes not only to an increase in the productivity of the mill due to an increase in the air flow, but also considerably increases the intensity of the grinding process at the last steps of the mill. Therefore, the presence of overflow thresholds 7 on the second and subsequent stages of the rotor, which organize a uniform flow of the material being crushed into the upper zone of the stage, contributes to the increase in the intensity of the flow. This significantly reduces the possibility of the material being passed through the mill without breaking. An increase in the intensity of the impact on the material at the last stages and a decrease in the likelihood of uncut particles overshoot lead to an increase in the fineness of the product and to an overall increase in the efficiency of the mill.

The arrangement of the rotor stages in the radial direction and the execution of the rotor billow at each subsequent stage of greater length simultaneously reduces the overall dimensions of the mill, simplifies the design of the body, which in this case can be cylindrical.

FIG. 2

6

Claims (1)

CENTRIFUGAL MILL, containing loading and unloading nozzles, a housing with chippers, a stepped rotor with chisels, each subsequent step of which is made of a larger diameter, characterized in that, in order to increase the grinding efficiency and reduce its overall dimensions, the rotor steps are located in the radial direction and are separated one from the other by means of concentric, annular inserts, the beat of the rotor at each subsequent stage is made longer, and the second and subsequent stages of the rotor are equipped with ring per conical shaped thresholds. FIG. 1 J 7 \ \ ί G / / 7 / ^^ 77Ύ777777 ^^ ΕΖ ^ ΖΣ ^ ζΖΖΖΖα. ////// //////////// ^ /////// ^ // ^