SU1699609A1 - Magnetic drum - Google Patents

Description

The invention relates to magnetic separation and can be used in the enrichment of ferromagnetic materials, as well as in the separation of molding compounds in the foundry industry.

The purpose of the invention is to increase the efficiency of the separation process and the reliability of the drum.

Fig, 1 shows the drum, a general view; figure 2 - section aa in figure 1.

The magnetic drum consists of a magnetic system, which includes a shaft 1 mounted in brackets 2. A shaft 3 is mounted on shaft 1 with sector pole pieces 4 between which a magnetize winding 5 is wound and covered by a casing 6. The magnet system is enclosed by a shell 7 connected through shock absorber 8 with end discs made of rim 9, stiffening ribs 10 and bushings 11 with bearings 12 mounted on shaft 1. Shock absorber 8 is held by means of a groove on rim 9 and removable rings 13. Shell 7 is supplied ferromagnetic inserts 14 installed around the circumference of the shell with equal pitch opposite the pole pieces 4. The pole piece is supplemented with a non-magnetic part to a full circle and forms a disk 15, which also serves as the winding cheek 5. Ferromagnetic screen 16 mounted between the shell 7 and the non-magnetic part of the disk 15, serves to shunt the dissipated field of the winding 5,

The drum works as follows.

An electric current is applied to the magnetising winding 5. A magnetic field is created between the pole pieces 4. At the same time, the shell 7 is rotated by means of a rotary drive (not shown). After that, the flow of material to be separated is fed to the rotating shell 7. The metal is attracted to the shell 7, is moved away from the falling part of the non-magnetic part of the stream and unloaded at the edge of the ferromagnetic part tip 4. Ferromagnetic inserts 14,

being located above the ferromagnetic part of the disk 15, they function as magnetic field concentrators.

When they are removed from the magnetic field, their magnetization decreases and the pieces of metal located near them smoothly disappear from the shell in a place where the magnetic force acting on it becomes less than the force of gravity of the extracted piece of metal. The shock absorbers 8 at the moment of metal attraction to the shell 7 cm are thickened by the impact of the metal on the shell 7. When the shell 7 is rotated with the face discs of the rib 10 on one side

air is directed under the housing 7, and on the other hand, air is drawn out from under the sheathing of the liner 7, thereby creating airflow around the magnetize winding 5.

In comparison with the known, the proposed device allows to increase the efficiency of the separation process by increasing the magnetic forces by improving the cooling system of the magnetizing windings and reliability of operation due to softening of the conditions of initial contact of the pieces and the metal.

Claims (2)

1. Magnetic drum, including placed inside a non-magnetic shell with holes and face disks, a magnetic system containing a core with sector-pole lugs and a magnetization winding, characterized in that, in order to improve the separation process and reliability of the drum, it is equipped with ferromagnetic inserts, a ferromagnetic shield and shock absorbers, at the same time, the inserts are fixed in the holes of the shell around the circles opposite the pole disks, the screen is located inside the shell under the pole tips, and the shock absorbers are located between shell and face discs. five 2. The drum according to claim 1, about tl and h and y and with the fact that the end disks are made in the form of a rim and radial ribs. Aa 7 I sixteen (pus 2