SU1445793A1 - Electric magnetic pulley iron separator - Google Patents

Abstract

This invention relates to magnetic separation. The goal is to increase the efficiency of extraction and reliability of unloading ferromagnetic objects. Electromagnetic pulley iron separator includes disk poles 2 mounted on a common shaft 1, magnetizing coils 3, interpolar overlaps (MP) 4, made in the form of a nonmagnetic ring or disk, additional MP 5 installed under MP 4. In this case MP 5 is made of ferromagnetic material and It has the shape of a “squirrel wheel” BC, and in the jumpers connecting its rim there are holes, the width of which is smaller than the holes between the rims. Ferromagnetic objects under the action of the magnetic field of the pulley are moved into the unloading zone, where they are periodically unloaded when passing through the unloading zone of the “BC” bridges. Under the action of sections of the magnetic field with an increased intensity and elevated values of the tangential components of the intensity gradient, ferromagnetic objects are carried along with jumpers "BC" and detach from the surface of the pulley in the discharge zone. 3 il. (L

Description

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The invention relates to the field of magnetic separation and can be used in foundries, thermal power plants, coking plants, construction materials plants and other industries to extract ferromagnetic metal inclusions from the molding sand stream, coal, ore, sand and other bulk non-magnetic materials. materials transported by belt conveyors.

The purpose of the invention is to increase the efficiency of extraction and reliability of unloading ferromagnetic objects.

FIG. 1 shows an electromagnetic pulley iron separator, general view; on

FIG. 2 - a scan of additional inter-, common material 7 is poured through the pin, pole overlap; in fig. 3 shows a circuit not delayed, but the devices contained in it are installed in the operating mode.

The electromagnetic pulley iron separator includes disk poles 2 mounted on a common shaft 1, magnetizing coils 3, an interpolar overlap 4 20 in the form of a non-magnetic ring, and an additional interpolar overlap 5 of a ferromagnetic material, having the shape of a squirrel wheel. At the same time, in the jumpers connecting the rim of the squirrel wheel there are holes, the width of which is less than the width of the holes between the rims, and the jumpers themselves are placed around the circumference of the pulley with some schag, the value of which (Fig. 2) is equal to nD / 2, where B is the diameter of the squirrel wheel. The belt conveyor 6 serves to transfer the bulk material 7 with ferromagnetic objects 8 contained therein, which are discharged into the receiver 9.

Electromagnetic pulley and due to the continuous shifter works as follows.

In the operating mode, the electromagnetic chuck is installed as the driving drum of the belt conveyor 6 (FIG. 3), on which the bulk non-magnetic material 7 is moved with ferromagnetic objects 8 contained in it. The magnetizing pulleys of the pulley are connected to a DC network, resulting in pulley volume is created

Claims (1)

The magnetic objects 8 are magnetically attracted to the surface of the pulley and, together with the conveyor belt 6, are transported to the unloading zone located at the vanishing point of the empty belt branch from the surface of the belt, where they are periodically unloaded as they pass through the unloading zone of said ferromagnetic jumpers. wheels with areas between them with the largest width in-ax. The increase in reliability of unloading is ensured by the fact that, under the action of local areas of a field of increased intensity and with elevated values of the tangential, magnetic field gradient strength components, ferromagnetic objects in the unloading zone near the surface of the yoke are carried along with jumpers " squirrel wheel, i.e. detached from the surface of the pulley in the zone of calculation are unloaded into the receiver 9. The formula of the invention 40 Electromagnetic sheave separators comprising mounted on a common shaft disc poles, the pole overlap in the form of a non-magnetic ring or disc and the magnetizing coil, characterized in that, in order to increase recovery efficiency and reliability unloading ferromagnetic objects, pulley separators provided with interpolar overlap, made of ferromagnetic material installed under a non-stationary magnetic field. At the same time, the ferromagnetic jumpers of the squirrel wheel overlapping the interpolar gap are highly saturated, as a result of which considerable space is created in the placement areas of these elements along the circumference of the tongue. The local areas of the magnetic field of increased intensity are created on the surface of the cheek. As shown by calculations and experimental studies on physical models, in the zone where these areas are located, the intensity and gradient of the magnetic field on the pulley surface increase to 2 ... 4 times. At the same time, due to the implementation of disk poles without non-magnetic sector inserts at the working extraction depths, i.e. at distances of 100 ... 300 mm from the surface of the yoke, the field is practically distributed with uniform intensity around the pulley circumference. During rotation of the mandrel loose non-magnet due to the continuous movement of the conveyor belt in the final The magnetic objects 8 are magnetically attracted to the surface of the pulley and, together with the conveyor belt 6, are transported to the unloading zone located at the vanishing point of the empty belt branch from the surface of the belt, where they are periodically unloaded as they pass through the unloading zone of said ferromagnetic jumpers. wheels with rim sections placed between them with the greatest width in-ax. The increase in reliability of unloading is ensured by the fact that, under the action of local areas of a field of increased intensity and with elevated values of the tangential components of the magnetic field intensity gradient, ferromagnetic objects in the unloading zone near the surface of the bumper are carried along with jumpers of squirrel wheel, t . detached from the surface of the pulley in the discharge zone and due to the continuous opening of the conveyor belt in b the discharge is discharged into the receiver 9. The formula of the invention Electromagnetic sheave separators comprising mounted on a common shaft disc poles, the pole overlap in the form of a non-magnetic ring or disc and the magnetizing coil, characterized in that, in order to increase recovery efficiency and reliability unloading ferromagnetic objects, pulley separators provided with interpolar overlap, made of ferromagnetic material installed under a nonmag the tangential components of the gradient are underdone interpolar overlap and have a magnetic field strength. In the area of the jumpers, where the width of the ring rims of the squirrel wheel is greatest (zones A in Fig. 2), due to the reduction of the interpolar gap here, near the surface of the shape of the squirrel wheel, while in the jumpers connecting the rim of the squirrel wheel, holes are made less than the width of the holes between the rims. A fillet interpolar overlap and having the shape of a squirrel wheel, while in the bridges connecting the rim of the squirrel wheel, holes are made whose width is less than the width of the holes between the rims. Phie.