Magnetic separator

FIELD: process engineering.

SUBSTANCE: invention relates to magnetic separation of sold materials from fluids, namely, to magnetic separators with material cylindrical drives and may be used in separation of emulsions and suspensions. Magnetic separator comprises feeding and discharging channels for magnetic and nonmagnetic materials, working member made up of inner and outer cases made from nonmagnetic materials, device to separate flow into magnetic and nonmagnetic fractions, and filter element from ferromagnetic. Said filter features triangular cross section. Gaps between teeth in said filter is filled flush with nonmetallic nonmagnetic material. Said filter element is made magnetically hard ferromagnetic material and magnetised in radial direction to induce inherent residual pseudo homogeneous magnetic field with intensity H and large radial gradient.

EFFECT: higher efficiency of separation and operation, simplified design, smaller overall dimensions.

2 dwg

 

the invention relates to the field of magnetic separation of solid materials from the fluid, namely, magnetic separators with a cylindrical device material moving and stationary magnets, and can be applied in thin separation of emulsions, suspensions and suspensions.

The prior art magnetic separator from the description of an invention to the patent of Russian Federation №2245194 C2, CL. VS 1/14, publ. 27.01.2005, bul, including feeder, feeding and discharge channels for the magnetic and non-magnetic products, work the body in the form of a non-magnetic drum is located within the magnetic system of the main and additional permanent magnets with alternating polarity.

The disadvantage of the described device is the lack of efficiency in thin separation of heterogeneous systems based fine particles.

From the patent RU 2390381, CL VS 1/14, publ. 27.05.2010, bull. No. 15, the known magnetic separator, including feeding and discharge channels for the magnetic and nonmagnetic fractions, the working body is located within the magnetic system of permanent magnets with alternating polarity. The working body is an inner and outer shells are made of a nonmagnetic material, with the two magnetic systems of the permanent magnets and the separator. Filter element Speer is through form, placed on the outer side of the inner case made of soft ferromagnetic material.

The analysis of the known magnetic separators found that improvement in the main indicators of the separators in the effective separation of dispersed particles is achieved by increasing the gradient magnetic field strength in the separation zone at the expense of reducing the size (diameter) of the filter elements (Feh), which reduces the performance of the separator and an increase in its mass-dimensional parameters.

An object of the invention is to increase the efficiency of separation and the reduction of its weight and size by expanding the coverage of the high-gradient magnetic field Feh, transverse movement of the separated environment, and removal of the magnetic system of permanent magnets and replacement of its action on the effect of inhomogeneous magnetic field of the magnetized solar PV, made of hard magnetic ferromagnetic material.

The technical result of the invention is achieved in that in the magnetic separator, including loading and unloading channels under magnetic and non-magnetic products, working body, representing the inner and outer housings, made of nonmagnetic material, a separator for separation of the flow on the magnetic and non-magnetic fracc and, filter element made in the form of profiled teeth (with a cross-section of a triangular shape) of the ferromagnetic hard magnetic material placed on the outer surface of the inner casing, the space between the teeth are filled with non-magnetic non-metallic material flush, with the aforementioned filter element magnetized in the radial direction that creates along the flow axis in the annular gap between the buildings of the working body's own residual radial pseudomonotone magnetic field H with a large radial gradient.

Figure 1 shows the scheme of a magnetic separator, figure 2 shows the I 1 and accommodation profiled teeth of the filter element perpendicular to the axis of the separator.

The separator (figure 1) consists of an inner 1 and outer 2 buildings made of nonmagnetic material, a separator 4, the boot channel 5 and the discharge channels I, II. On the outer surface of the housing 1 is placed profiled teeth with a cross-section of triangular shape (the direction of which is parallel to the axis of the separator), the gaps between the teeth are filled with non-magnetic non-metallic material 6, these teeth are filtering elements 3 (PV) figure 1. The filter element is made of a hard magnetic ferromagnetic material and namahn the Chen in the radial direction, that creates along the flow axis radial own residual pseudomonotone magnetic field H with a large radial gradient. The presence of PV of this form with its own residual magnetic field allows you to expand the zone of high magnetic field inhomogeneity Feh, to increase the gradient and thereby to increase the width of the annular working channel between the housings 1, 2. This improves the efficiency of the separation of the separated environment, the performance of the device, to simplify the design of the separator and to reduce its length and weight.

Magnetic separator works as follows.

The separated environment through the loading channel 5 enters the annular channel between the housings 1 and 2, in which there is flow separation (separation) of a heterogeneous environment. Occurs the separation of weakly magnetic and magnetic dispersed particles from the dispersion liquid or gaseous medium through the magnetic gel in transverse inhomogeneous magnetic field generated PV 3. The presence of non-magnetic non-metallic material 6 in the space between the teeth reduces the hydraulic resistance of the annular channel between the housings 1 and 2.

Constructive accommodation of teeth PV across the axis of the separator shown in figure 2.

The medium containing dispersed magnetic fraction goes through handling the anal I, purified non-magnetic dispersion fraction - through channel II. Separation of these fractions is done by using the separator 4.

Refer to structural diagram (figure 2) magnetic separator:

Hmax- the maximum value of tension of the self-magnetic field Feh (to top of fork);

H0- the minimal value of the tension of the self-magnetic field Feh (in the area of the inner surface of the housing 2).

Magnetic separator, including loading and unloading channels under magnetic and non-magnetic products, working body, representing the inner and outer housings, made of non-magnetic material, a separator to separate the flow into magnetic and nonmagnetic fractions, a filter element made of ferromagnetic material, characterized in that the said filter element in cross section has a triangular shape, the space between teeth filled non-metallic non-magnetic material flush, filter element made of hard magnetic ferromagnetic material and magnetized in the radial direction that creates along the flow axis radial own residual pseudomonotone magnetic field H with a large radial gradient.



 

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