SU1097386A1 - Pneumatic separator - Google Patents

Abstract

. A PNEUMATIC SEPARATOR, containing a centrifugal gravity chamber. With a circular outlet channel for a small product, the center. which is offset from the center of the centrifugal-gravity chamber, guide vanes, cyclone, fan, loading devices and collections of coarse and fine fractions, characterized in that, in order to increase the separation efficiency due to the intensification of the process in the centrifugal gravity chamber, the outlet for the small product relative to the center of the centrifugal gravity chamber is 0.15-0.3 times its diameter, the ratio between the diameters of the centrifugal gravity chamber and the The canal of the fine product is 1: 0.2-1: 0.4, and the ratio of the diameter of the centrifugal-gravity chamber to its width is 3: 1-7: 1. CO 00 and

Description

1 The invention relates to devices for the pneumatic separation of bulk materials and can be used in the beneficiation of minerals. A device for pneumatic separation of bulk materials is known, which includes a chamber, a rotating container, an air supply system, a cyclone, and devices for supplying raw material and collecting fission products fl 1. The disadvantage of this device is the presence of moving parts in the zone of high gaseous atmosphere, which causes their quick wear. The closest to the proposed technical essence and the achieved result is a device that includes a centrifugal-gravity chamber with a circular outlet duct for a small product, the center of which is offset from the center of the centrifugal-gravity chamber, guide vanes, a cyclone, a fan, a loading device and collections coarse and fine fractions of G 2 J. A disadvantage of the known device is the low separation efficiency. The purpose of the invention is to increase the separation efficiency due to the intensification of the process in the centrifugal-gravity chamber. The goal is achieved by the fact that in a pneumatic separator, which includes a centrifugal-gravity chamber with a circular outlet channel for a small product, whose center is offset from the center of the centrifugal-gravity chamber, guide vanes, a cyclone, a fan, loading devices and large and shallow collectors fractions, the displacement of the center of the round outlet channel for a small product relative to the center of the centrifugal-gravity chamber is 0.15-0.3 of its diameter, the ratio between the diameters of the centrifugal The o-gravity chamber and the outlet of the small product is 1: 0.2-1: 0.4, and the ratio of the diameter of the centrifugal gravity chamber to its width is 3: 1-7: 1. The drawing shows the proposed separator, a general view. 6 Pneumatic separator includes fan 1, closed duct system 2, centrifugal -. gravity chamber 3, cyclone 4 and feed hopper 5. Inside the centrifugal gravity chamber 3 there is a loading channel 6 with a guide vane 7 in it. To discharge the small product from chamber 3, there is a circular outlet channel 8, the center of which is offset from the center of chamber 3. V The lower part of the chamber 3 is fitted with louvre directions to the side of the blade 9, fixed on an axis to the side walls of the chamber 3. A semicircular partition 10 is attached to the channel 8, which is fixed fixedly to the side walls of the chamber 3. For collecting a large fraction The bunker 11 serves as well, and the bunker 12 serves as a small one. The pneumatic separator is mounted on a metal frame 13. The separator operates as follows. The fan 1 pumps air through the air duct 2 into the centrifugal gravity chamber 3. The source material from the bunker 5 enters the loading channel 6 and then is introduced into the air flow. The angle of inclination of the air flow entering the chamber 3 is controlled by means of the guide vane 7. In the centrifugal gravity chamber 3, under the action of centrifugal and gravitational forces, the material is divided into fractions. The coarse (coarse) fractions enter the hopper 11, and the small product is carried by the air stream through the channel into the cyclone 4 and then settles in the bunker 12. Purified air from the material is again supplied to the fan 1: measure 3. To prevent the small fraction from falling into the bunker 11 of the large product serves as louvre guide vanes 9. The partition 10 prevents the large product from entering the cyclone 4. From the determination of the optimal dimensions of the pneumatic separator, a series of experiments was carried out with tin-containing concentrates of Khingan and Sunny. Go combines. The grain composition of the starting products is given in table 1.

The change in separation efficiency when the center of the round outlet of the small product is displaced relative to the center of the centrifugal gravity chamber

Class content - 0.071 mm in separation products given

in table.2.

table 2

Khingan concentrate

During the experiments, the following parameters are changed: the displacement of the center of the round discharge channel of the small product relative to the center of the centrifugal-gravity chamber; the ratio between the diameters of the centrifugal gravity chamber and the outlet of the small product; the ratio of the diameter of the centrifugal gravity chamber to its width.

In table 3 and 4 presents the results of experiments.

Table 4 The change in separation efficiency when the ratio of the diameter of the centrifugal gravity chamber and the outlet channel changes and the ratio of the centrifugal gravity ratio to its width changes.

46.0

49.0 1: 1

76.3

3: 1

64.5 79.1 62.1

5: 1

66.4 7: 1

75.6 72.4 53.8 10: 1

51097386

According to the experimental data of the outlet of the small product, the best separation occurs at 1: 0.2-1: 0.4 and with the diameter ratio

the offset center of the round graduation. centrifugal gravity chamber to the channel for a small product with a width of 3: 1-7: 1.

centrifugal-graphiton-5 center application. The use of the proposed separaton chamber by 0.15-0.3 of its diameter, with optimal design parameters with a ratio of the diameters, improves the centrifugal gravity chamber and the separation efficiency by 7-10.

Claims (1)

. PNEUMATIC SEPARATOR, containing a centrifugal gravity chamber with a round outlet for a small product, the center of which is offset from the center of the centrifugal gravity chamber, guide vanes, a cyclone, a fan, loading devices and collectors of large and small fractions, characterized in that, in order to increase separation efficiency due to the intensification of the process in a centrifugal gravity chamber, the displacement of the center of the circular outlet channel for a small product relative to the center of the centrifugal gravity chamber is 0.15-0.3 of its diameter, the ratio between the diameters of the centrifugal gravity chamber and the outlet channel of the small product is 1: 0.2-1: 0.4, and the ratio of the diameter of the centrifugal gravity chamber to its width is 3 : 1-7: 1. 9Sh60TT)