SU1331559A1 - Jet mill for milling - Google Patents

Abstract

The invention relates to grinding installations and can be used with compressed G 6 vano, in particular, to obtain fire-proof fine dispersed porcine. The aim of the invention is to improve the degree of grinding. E-part 8 of the flat grinding chamber 4 is connected to the jet-vortex ejector 8, and the upper part of the grinding chamber 4 and the jet-vortex ejector 8 are connected to the piping system of pipes 9 and 10; from the cyclone 13, the hand filter 14 and the exhaust fan 15 of the torus 15, through the static mixer 11. This eliminates the mutual influence of the operating modes of the grinding chamber 4 and the dust-collecting ycTpoi icT-va and increase the grinding intensity. 5 1

Description

The invention relates to milling installations and can be used to obtain fine powders in the chemical, construction and other industries.

The purpose of the invention is to increase the degree of grinding.

Fig. 1 is a schematic diagram of a jet mill dp of ultrafine grinding; figure 2 - boot device, longitudinal section; 3 - grinding chamber, longitudinal section; figure 4 - section aa on fig.Z; figure 5 - section bb in figure 3.

The jet mill dp of ultra-fine grinding consists of a feed hopper 1, in which an ejector feeder 2 is located in the lower part, an acceleration pipe 3 and a grinding chamber 4. The upper part of the grinding chamber is connected to the cochlea 6 through the pipe 5, and the lower part of the chamber is connected to jet-vortex ejector 8. The cochlea 6 and the jet-vortex ejector 8 are connected via a dust-mixing pipe 9 and 10 with a static mixer 11. The mixer 11 is connected

cutting the conveying pipe 12 s-30 is mixed, and through the pipe 12 of the guided air separation consisting of a cyclone 13, a bag filter 14 and an exhaust fan 13. In the lower part of the cyclone 13 and filter 14 a mechanical mixer 16 and a receiving hopper I7 are located for the finished product.

The jet-vortex ejector is identical in design to the ejector feeder 2 and consists of suction air enters the annular collector 18, guides the volute 22 and into the ejecting nozzle 21. Chip 19 located in the suction collector 22 the air is directed to the socket 18, the vortex nozzles 20, with the nozzles 20. Due to the tangentially directed tangentially, and the centric arrangement of the nozzles 20 and the lateral ejecting nozzle 21. The sub-45 presence of the spiral directions of the 1x compressed air line to nozzles the screw vortex is wedged through the annular collector 22.

The grinding chamber consists of a housing 23 within which evenly tangential nozzles 24 are located around the periphery. The housing has protective armor plates 25 and 26 and an annular manifold 27 providing

interacting with the whirlwind of the grinding chamber and creating a strong vacuum in the pipe 7.

The nozzle 21 sucks the rotating air-powder flow through the pipe.

10, and the fan 15 - through the cochlea

6 through pipe 9 into a static mixer

a uniform distribution of compressed air through the nozzles 24. The collector 27 and the collector 22 are connected to a pipe 28, which supplies compressed air to the jet mill. 28 on line 28

An adjusting valve 29 is provided to regulate the supply of compressed air to the nozzles 20 and 21 of the jet-vortex ejector, which creates a vacuum in the suction bell 18.

Jet mill works as follows.

The source material is loaded into the hopper 1, from which, using an ejector feeder 2, the air-powder mixture flows through the acceleration pipe 3 into the grinding chamber 4, where, under the action of compressed air ejected from the tangential nozzles 24, the material is crushed and due to centripetal forces created by the vacuum of the fan 15 and the jet-vortex ejector 8, enters the pipe 7.

Part of the powder under the action of the rotating flow of the jet-vortex ejector 8 enters the dust removal pipe 10, and the rest - thinner fractions - under the action of the vacuum of the fan 15 - into the dust removal pipe 9. Next, two streams on the dust removal pipe 9 and 10 enter static mixer 11, where

five

flow through cyclone 13 and bag filter 14 for discharge.

In this case, the powder is discharged through the chute into the mechanical mixer 16, and then into the receiving hopper 17 of the finished product.

The jet-vortex ejector works in the following way.

When opening the valve 29 compressed

air enters the annular collector 22 and into the ejecting nozzle 21. Through the collector 22, the air rushes to the nozzles 20. Due to the tangential arrangement of the nozzles 20 and the presence of spiral directions 1x 1x 19, a helical vortex occurs

interacting with the whirlwind of the grinding chamber and creating a strong vacuum in the pipe 7.

The nozzle 21 sucks the rotating air-powder flow through the pipe.

10, and the fan 15 - through the cochlea

6 through pipe 9 into a static mixer

11. By adjusting the valve 29 to supplying compressed air to the jet-vortex ejector, the vacuum in the mill chamber can be changed, affecting the degree of grinding and the quality of the product.

Claims (1)

An inkjet mill for ultrafine grinding, comprising a flat grinding chamber with tangential nozzles, a feed hopper with an eHeX-TopHbiM feeder connected to the spreader tube, an air separation system and a discharge hopper that is different in that. 31559 In order to increase the grinding degree, the mill is equipped with a mixer and a jet-vortex ejector, 5 of which is connected to the lower part of the grinding chamber, and a jet-vortex ejector and upper part of the grinding chamber are connected to the air separation system by means of a dust extraction system through 10 mixing pipes. CZ7 FIG. 2 // Fig.Z  TO FIG. Editor P.Geershi Compiled by B. Mol Vko Tehred A. Kravchuk Proofreader A. Ilyin Order 3754/7 Circulation 572Subscribe VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 FIG. five