CN100556552C - Vortex magnetic separator - Google Patents

Abstract

The invention relates to magnetic separation equipment, in particular to an eddy current magnetic separator. The magnetic separator includes an outer drum whose inner and outer walls are conical surfaces, and the outer drum is made of non-magnetic and non-metallic materials; there is an inner drum inside the outer drum, and the inner drum has an outer tapered surface close to the inner wall of the outer drum. Magnetic units with opposite polarities are alternately arranged on the outer cone surface of the inner drum; the inner and outer drums have the same vertical rotation axis and are driven separately by different rotating shafts; An annular material receiving port is arranged on the lower periphery of the inner and outer drums. The invention can improve the sorting effect of non-magnetic metal energy.

Description

Vortex magnetic separator

technical field

The invention relates to magnetic separation equipment, in particular to an eddy current magnetic separator.

Background technique

The working principle of the eddy current magnetic separation equipment is that magnetic materials with opposite polarities are alternately arranged on the rotating drum. When the material flow containing non-ferrous metals (such as aluminum, copper, zinc, etc.) passes through the drum at a certain speed, due to The alternating magnetic field generated by the rotating drum induces eddy currents in the non-ferrous metals. Since the material flow and the magnetic field have a relative movement speed, a thrust is formed on the metal conductor that generates the eddy current, so the non-ferrous metal can be separated from the material flow to achieve the purpose of separating the non-ferrous metal. In the traditional eddy current magnetic separation equipment, the drums are generally arranged horizontally, the alternating frequency is limited, and the non-ferrous metal has a short bouncing distance, which is easy to mix with other materials, which affects the effect of magnetic separation.

Contents of the invention

The technical problem to be solved by the present invention is to provide an eddy current magnetic separator with better magnetic separation effect.

The eddy current magnetic separator of the present invention includes an outer drum whose inner and outer walls are conical surfaces, and the outer drum is made of non-magnetic, non-metallic material; an inner drum is arranged in the outer drum, and the inner drum has an outer drum that is close to the inner wall of the outer drum. On the cone surface, magnetic units with opposite polarities are alternately arranged on the outer cone surface of the inner drum; the inner and outer drums have the same vertical rotation axis and are driven by different rotating shafts; There is an annular feeding opening on the lower periphery of the inner and outer drums, and the feeding opening is divided into an annular inner ring and an outer ring;

The shaft of the outer drum is a hollow structure, which is installed on the frame through bearings and driven by the driving wheel of the outer drum; the shaft of the inner drum passes through the center of the shaft of the outer drum and is connected to each other through bearings. Connected, the lower end of the inner drum shaft is driven by the inner drum drive wheel;

The above-mentioned magnetic units installed on the surface of the inner drum are in the shape of a helix, and the polarities of the adjacent helix-shaped magnetic units are opposite, and the number of ends of the helix is an even number.

Because the present invention adopts the vertical conical roller as the magnetic field generating device, the material flow falls from above the roller and can make full use of the natural gravity when passing through the conical surface, so that the alternating frequency of the magnetic field is greater and the non-magnetic metal can bounce Farther, thus improving the sorting effect.

Description of drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Detailed ways

The reference signs shown in the figure are: outer drum 1, outer drum rotating shaft 11, outer drum driving wheel 12, inner drum 2, inner drum rotating shaft 21, inner drum driving wheel 22, magnetic unit 23, rack 3, blanking Port 4, feed port 5, inner ring 51, outer ring 52.

In the embodiment of the present invention, during the working process, the inner drum 2 and the outer drum 1 rotate in the opposite direction or in the same direction at different speeds, thereby generating an alternating magnetic field outside the outer drum, and bulk materials fall from the discharge port 4 to the outer drum of the outer drum. On the cone surface, non-metallic materials are thrown into the inner ring 51 of the material inlet 5 under the action of the centrifugal force and gravity of the outer drum 1, and the non-magnetic metal in the material flow bounces to the outer ring of the material inlet 5 under the action of the eddy current 52, so as to achieve the purpose of sorting. The helical magnetic unit 23 can make full use of the falling distance of the material, increase the frequency of the magnetic field change, and further improve the separation effect. The inner and outer drums are respectively driven by the inner drum driving wheel 22 and the outer drum driving wheel 12, and their relative rotational speeds can be changed arbitrarily to achieve the purpose of adjusting the sorting effect.

Claims (4)

1, a kind of eddy current type magnetic separator, it is characterized in that: it comprises an outer drum (1) that inner and outer walls are conical surfaces, and outer drum is non-magnetic non-metallic material; There is an inner drum (2) in the outer drum ), the inner drum has an outer tapered surface close to the inner wall of the outer drum, and magnetic units (23) with opposite polarities are alternately arranged on the outer tapered surface of the inner drum; the inner and outer drums have the same vertical rotation axis and It is driven separately by different rotating shafts; a discharge port (4) is provided above the inner and outer drums, and a material receiving port (5) is provided on the lower periphery of the inner and outer drums; the material receiving port (5) is divided into an annular Inner ring (51) and outer ring (52). 2. The eddy current magnetic separator according to claim 1, characterized in that: the outer drum shaft (11) is a hollow structure, it is installed on the frame (3) through bearings and driven by the outer drum drive wheel (12) ; The inner drum shaft (21) passes through the center of the outer drum shaft (11) and is connected to each other through bearings, the upper end of the inner drum shaft is connected to the top of the inner drum, and the lower end of the inner drum shaft is driven by the inner drum driving wheel (22) . 3. The eddy current magnetic separator according to claim 1 or 2, characterized in that: the magnetic units (23) installed on the surface of the inner drum are helical, and the adjacent helical magnetic units have opposite polarities. 4. The eddy current magnetic separator according to claim 3, characterized in that: the number of helical threads formed by the magnetic unit (23) is an even number.

Images