SU688234A1 - Separator for removing foreing matter from fibrous materials - Google Patents

Description

The invention relates to the enrichment of minerals and can be used to separate impurities from fibrous materials, in particular asbestos ores, as well as to separate fibrous materials in the building and textile industries.

A separator is known, consisting of corona and non corona electrodes, the latter of which are rotatable 1.

The disadvantage of this separator is the low efficiency of the separation process.

The closest to the technical essence of the invention is a separator consisting of corona and non corona electrodes, the latter being made in the form of a perforated rotating drum, inside of which there is a metal drum coaxially eivcy, loading and unloading bins and feeder 2.

The disadvantage of this separator is the insufficiently complete removal of impurities from fibrous materials, in particular, dust and gale from asbestos materials, due to the fact that impurities are tightly bound to the fibers of the enriched material and removed by air flow and in a corona-type electric field. is difficult. At the same time, a part of the pulverized material separated from the fibers leaves the separator together with the enriched material and again pollutes it.

The aim of the invention is to increase the efficiency of the separation process.

This goal is achieved by the fact that the separator is equipped with an audible gas-jet siren installed in the zone of the corona electrode, and the working surface of the perforated drum is made in the form of alternating strips and rods arranged in the image of the drum, and the strips are elastically fixed on the drum, and the rods are coated with electrifying material, while the feeder is made in the form of a tray screen, and the metal drum is solid and equipped with a device for collecting and removing the collected dust.

Perform perforated drum in the form of a series of metal strips, elastically fixed on the rims of this drum, and alternating with them rods covered

layers of electrifying material, ensures the capture of fibrous material by electrified rods and its reorientation in the field of discharge due to the attraction to the plates, and the installation

In front of this drum, the sound gas-jet siren allows for more intensive cleaning of the fibers from impurities due to the vibration of the fibers and plates in the sound field and the effect of the air flow generated by the sound-jet gas siren.

Installing an internally perforated drum of a solid metal drum equipped with a dust removal device makes it possible to trap the dust extracted from the fibrous material by depositing it on this drum due to the charges received by its particles in the corona field, and remove this dust from the separator .

FIG. 1 shows a sectional separator; in fig. 2 — node I in FIG. one.

The separator for removing impurities from fibrous materials contains a bed 1, on which the deck 3 is fixed with elastic t 2 and the oscillatory movements from mechanism 4. A hopper 5 of the source material is installed above the deck. Above the surface of the sieve 6 fixed on the deck, a non-perforated drum 7 is installed. Inside this drum there is an auger 8 rotating in a tray 9 connected to a brush 10. The perforated drum is closed by a casing 11, to the inner surface of which a brush 12 is attached. This casing is connected to umbrella pipe 13 for suction of purified fibrous material. A metal drum 14 is installed coaxially inside the perforated drum. A corona-forming electrode 15 is installed opposite the perforated drum. It is connected through the insulator 16 to the pole of a high-voltage rectifying installation. Behind him on the air supply pipe fixed gas jet siren 17 rod type. The diffuser 18 of this siren is rigidly connected to the pipeline umbrella for suctioning the purified material and the cage of the separator. A receiver 19 is installed to collect the oversize product, and a receiver 20 is installed under the undersize product. The perforated drum consists of gaps 21, to which rods 23 covered with a layer of electrifying material 24, such as ebonite, are attached through sleeves 22. Between these rods, metal plates 27 are fastened to the rims through sleeves 25 and springs 26.

The separator works as follows.

The raw fibrous material, for example asbestos, from the hopper 5 is fed to a sieve 6 of deck 3, which oscillates in a horizontal plane. The passage through the sieve, the material is partially cleaned of impurities, which through the holes in the sieve fall on the bottom and are discharged into the receiver 20. The material, partially purified in this way, is fed through the sieve 6 under the perforated drum 7, which slowly rotates counterclockwise. In this case, the surface of the rods 23 is electrified in the field of the corona discharge created by the corona electrodes 15. The fibers of the material are attracted to the charged surface of these rods and are raised to the zone of corona discharge, where the fibers are reorientated due to intensive charging and attraction to the surfaces of metal plates 27. Throughout the entire path of movement of a fibrous material with a perforated drum, this material is subjected to intensive processing by sound and air flows created by gas-jet siren 17. The particles of impurities are removed from the fiber fall into the interior of the perforated drum 7, which are deposited on a solid metal drum 14 rotating clockwise. The process of removing impurities also contributes to the vibration of metal plates 27 under the action of sound vibrations. Particles of impurities deposited under

the action of electric forces on the surface of the drum 14 is transferred by it to the cleaning area, where the brushes 10 are swept into the tray 9 and the screw 8 is led out of the separator through an annular hole in the end wall

perforated drum.

Purified from impurities in the sound field, the fibrous material is lifted by a perforated drum to the umbrella, swept away with a brush 12 and sucked through the umbrella by

pipeline 13.

The separator allows to obtain products of higher quality with a minimum content of impurities, provides the ability to remove impurities from a variety of materials, regardless of their electrophysical properties, makes it possible to carry out by-pass trapping of the dust removed from the fibrous material, which reduces the dustiness of the working rooms,

atmosphere and improves labor conditions.

Claims (3)

1. A separator for removing impurities from fibrous materials, including loading and unloading bins, a feeder, an electrode system consisting of corona and non-corona electrodes, the latter being made in the form of a rotating perforated drum, inside which a metal drum is placed coaxially to it, that in order to raise the effectiveness of the separation process, it is equipped with a sound gas jet siren installed in the area of the corona electrode, and the working surface of the perforated drum is made in the form of alternating strips and rods arranged along the drum's generator, the strips being elastically fixed on b; m; me; and ng rods are applied coating of electrifying material. 2. A separator according to claim 1, characterized in that the feeder is in the form of a trough screen. 3. A separator according to claim 1, characterized in that it is metallic ;; drum made solid and equipped with a device for collecting 1} -dale; silt collected dust. Sources of information taken by the attention in the examination 1.Oolofinsky NF Electrical enrichment methods. M., “Nedra, 1977 p. 180-189. 2.Automatic certificate of the USSR 515532, cl. At 03 On 7/06, 1973.