SU1487998A1 - Magnetic separator - Google Patents

Description

The invention relates to the magnetic separation of iron ores and increases the reliability of the separator and the quality of the concentrate by increasing the activity of magnetic agitation flocs. The separator contains a rotating non-magnetic drum (B) 1, covered with anti-corrosion diamagnetic lining

2. In the lining layer 2 on the outer surface of B 1, fixed along the generators B 1 at the same distance from one another ferromagnetic plates (FP) 3 of rectangular cross section. Inside B 1 there is a magnetic core 4, on which are fixed rows of permanent magnets (M) 5, forming a magnetic system 6 with alternating polarity of the poles in the direction of rotation B 1. The separator also has a loading device 7, a bath 8 and unloading devices 9 and 10, respectively, tails and concentrate. The width of the FP 3 is 12–100% of the width of the poles M 5. The pulp from the device 7 enters the bath 8. The magnetic particles are attracted to the surface of the lining 2 and due to the rotation B 1 are transferred to the discharge device 10. Non-magnetic particles flow to the device 9. When FP 3 overlap the poles of M 5, there is a weakening of the magnetic field on the surface of the FP 3. In combination with the alternating polarity of the poles of M 5, this increases the activity of magnetic agitation of flocs. 1 il.

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The invention relates to the field of magnetic enrichment of minerals and can be used in the ferrous metallurgy at the beneficiation plants, processed magnetite ores.

The purpose of the invention is to improve the reliability of the separator and the quality of the concentrate by increasing the activity of magnetic agitation flocs.

The drawing shows a separator, a general view in section. one

The magnetic separator contains a rotatable non-magnetic drum 1 coated with an anticorrosive diamagnetic lining 2. In the lining layer 2 on the outer surface of the drum 1 ι, ferromagnetic plates 3 of rectangular cross-section are formed at the same distance from each other. Inside the drum 1 is placed the magnetic core 4, on which are fixed rows of permanent magnets 5, forming a magnetic system 6 with alternating polarity of the poles in the direction of rotation of the drum 1. The separator also has a loading device 7, a bath 8 and discharge equipment 9 and 10, respectively, tails; and concentrate. The width of the ferromagnetic plates 3 is 12-100% of the width of the poles of the magnets 5.

Magnetic separator works as follows. one

The original pulp from the boot device 7 by gravity flows into the bath 8 of the separator.

Magnetic particles under the influence of the magnetic field of the magnetic system 6 are attracted to the surface of the anti-corrosion 1 diamagnetic liner 2 and are transported to the discharge device 10. Non-magnetic product by gravity

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moves to the discharge device 9.

As the drum 1 rotates, the ferromagnetic plates 3 are moved relative to the poles 5 of the magnetic system 6, fixed with the help of cross-arms on a fixed shaft. This leads to a decrease in the magnitude of the magnetic field due to the oppositely directed demagnetizing magnetic field.

θ ferromagnetic plates 3.

Reducing the magnitude of the magnetic field leads to a weakening of the strength of magnetite floccules and contributes to their effective destruction under the action of 5 mechanical forces, to the release of nonmetallic grains and poor ones, in terms of iron content, splices. In addition, the weakening of the magnitude of the magnetic field in the region of the ferromagnetic plates 3 leads to abrupt movements of magnetite strands and aggregates in the region of high gradient, which also contributes

the destruction of the latter.

Claims (1)

Claim A magnetic separator containing a magnetic system with alternating polarity poles placed inside a non-magnetic drum installed with the possibility of rotation, on the outer surface of which are fixed along forming ferromagnetic plates of rectangular section at equal distances from each other, a bath, loading and unloading devices, characterized in that in order to improve the quality of the concentrate by increasing the activity of magnetic agitation of flocs, the width of the plates is equal to 12–100% of the width of the poles agnitnoy system.