SU1639751A1 - Magnetic separator - Google Patents

Abstract

This invention relates to the magnetic enrichment of minerals. The goal is to increase the efficiency of the separation process. A non-magnetic drum (B) 2 with an induction array is rotatably mounted in the separator housing under the feeder. The latter consists of outer 6 and inner 7 parts and working elements (OM) 8 and 9 in the form of pointed strips of magnetically soft steel, oriented along generator line B 2 on its circumference. Inside B 2 there is a magnetic system from a pole (P) 4 of alternating polarity. When this re 9 part 7 of the lattice is embedded in the shell B 2 and re 8 part 6 are located above it. Ostry re 8 and 9 parts 6 and 7 are facing each other. The ratio of the distance a between the RE 8 and 9 along the circumference B 2 to the distance b between them in the radial direction is equal to 1 / 1-1 / 04. The distance between the ER 8 and 9 in the radial direction is equal to no more than 1/4 of step P 4. Moreover, the points of the ER 8 and 9 are located opposite each other. A voluminous field with a high gradient is induced between the tips of RE 8 and 9, reaching a maximum when the tips pass over P 4 and descend to almost zero in the middle position between P 4. non-magnetic particles are released. 2 Il. (Ls

Description

FIG. 2

The invention relates to the magnetic enrichment of minerals, magnetic separators for the enrichment of finely ground highly magnetic ores in the dry mode.

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

Figure 1 shows the separator, a general view; figure 2 - node I in figure 1.

The separator includes a housing 1, a working body in the form of a non-magnetic drum 2, a stable magnetic system 3 consisting of poles 4 of alternating polarity and an induction lattice 5 consisting of outer 6 and inner 7 parts, and working elements 8 and 9 in the form of pointed strips of magnetic soft steel (figure 2). The drum 2 is located under the feeder 10. The operating elements 9 of the inner part 7 are embedded in the slots of the drum 2 shell so that the points of the working elements are flush with the surface of the drum shell 2. The wedge gaps between the tips of the working elements 9 and the shell body of the drum 2 are filled with paramagnetic a filler, for example a polyester resin, so that the shell has a continuous surface. The working elements 8 and 9 are installed along the drum generator, and their tips are radially, while the edges of the working elements 8 are located opposite the edges of the working elements 9. The ratio of the distance between the working elements 8 and 9 around the circumference of the drum (a) to the distance between them in the radial direction (b) is equal to 1 / 1-1 / 0.4. The outer part of the lattice is removed from the inner one by no more than 1/4 step of the poles 4 of the magnetic system 3 (distance b).

The separator works as follows.

The source material is fed to the rotating drum 2, the magnetic particles are attracted to the drum 2, and the main mass of non-magnetic ones is thrown off the drum 2 by centrifugal forces. The magnetic particles attracted to the drum 2 are grouped into floccules, which move with the drum 2 to the place of discharge of the magnetic fraction. On the way to floccules,

Claims (1)

There is a variable in magnitude and direction magnetic field and centrifugal forces. Between the edges of the working elements 8 and 9 of the induction lattice, a volume field is induced with a high gradient, reaching a maximum when the tips pass over the poles 4 and descend almost to zero in the middle position between the poles 4. The points of the working elements 8 and 9, the passage over the surface of the pole 4, capture floccules due to high volumetric gradients. When the working elements 8 and 9 pass through the midpoint between the poles 4, the floccules explode with a pulsating gradient of intensity and the non-magnetic particles are released. Such an explosive destruction of flocs with their subsequent structuring at the next pole in an intense centrifugal field leads to the complete release of non-magnetic particles, and consequently, to an increase in the efficiency of the separation process. Claims Magnetic separator comprising a body mounted under the feeder rotatably non-magnetic drum with an induction lattice, whose working elements consist of pointed strips of soft steel magnet oriented along the drum forming along its circumference, the magnetic system of alternating polar poles located inside drum, and receivers of separation products, characterized in that, in order to increase the efficiency of the separation process, the induction grid is made of internally and the outer parts, the working elements of the inner part are embedded in the drum shell, and the working elements of the outer part are located above it, with the edges of the working elements of both parts facing each other, the ratio of the distance between them around the drum circumference to the distance between them in the radial direction is equal to 1 / 1-1 / 04, and the distance between these elements in the radial direction is made equal to no more than 1/4 of the pole pitch, with the tips of the working elements opposite each other. ten