MAGNETIC SEPARATOR

Abstract

A magnetic separator includes two parallel and spaced magnetic rods. Each magnetic rod includes a non-magnetic tubular body with a longitudinal axis and a chamber, a plurality of magnetic members nested in the chamber, and a plurality of spacers made of high magnetic permeability materials and respectively disposed between the adjacent magnetic members. The magnetic members in each magnetic rod are disposed with like poles adjacent each other. Poles of the magnetic members in one magnetic rod are opposite to poles of the nearest adjacent magnetic members in another magnetic rod. The width of each magnetic member in the longitudinal axis of the tubular body is larger than that of each spacer so that a matrix type magnetic flux lines can be formed by the grate magnetic separator.

Claims

1. A grate magnetic separator comprising: at least two parallel and spaced magnetic rods, each of the magnetic rods including a tubular body made of non-magnetic materials with a longitudinal axis and a chamber; a plurality of magnetic members being nested in the chamber along the longitudinal axis; a plurality of spacers made of a material having a high magnetic permeability or a high saturation magnetization being respectively disposed between the two adjacent magnetic members; the magnetic members in each of the magnetic rods being disposed with like poles adjacent each other, and poles of the magnetic members in one magnetic rod being opposite to poles of the nearest adjacent magnetic members in another magnetic rod; and each of the magnetic members having a first width in the longitudinal axis of the tubular body, each of the spacers having a second width in the longitudinal axis of the tubular body, and the first width being larger than the second width.

2. The magnetic separator of claim 1, further comprising a frame having a pair of opposed spaced side plates to spacedly secure the magnetic rods in a way that each of the magnetic rods is parallel to each other and in a common plane.

3. The magnetic separator of claim 1, wherein the first width is 10 to 25 times the second width.

4. The magnetic separator of claim 3, wherein the first width is 12 to 15 times the second width.

5. The magnetic separator of claim 4, wherein the first width is about 25 mm, and the second width is about 1.2 mm.

6. The magnetic separator of claim 1, wherein the tubular body is made of stainless steel, titanium alloy, copper alloy or aluminum alloy.

7. The magnetic separator of claim 1, wherein the magnetic members are made of rare earth magnets.

8. The magnetic separator of claim 7, wherein the magnetic members are made of NdFeB magnets.

9. The magnetic separator of claim 1, wherein the spacers are made of pure iron, low carbon steel or iron-cobalt alloy.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0012] FIG. 1 is a perspective view of a grate magnetic separator according to the present invention;

[0013] FIG. 2 is a perspective view of a magnetic rod of the grate magnetic separator according to the present invention;

[0014] FIG. 3 is a sectional view taken along line 3-3 of FIG. 2;

[0015] FIG. 4 is a sectional view of two adjacent magnetic rods of the grate magnetic separator according to the present invention, showing in detail the distribution of the magnetic flux lines formed by the two adjacent magnetic rods; and

[0016] FIG. 5 is an image of the magnetic flux lines formed by the grate magnetic separator according to the present invention.

DETAILED DESCRIPTION OF SPECIFIC EMBODIMENTS

[0017] It will be readily understood that the components of the present invention, as generally described and illustrated in the Figures herein, could be arranged and designed in a wide variety of different configurations. Thus, the following more detailed description of the exemplary embodiment of the present invention, as represented in the Figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of the embodiment of the invention.

[0018] Referring now to the drawings, a grate magnetic separator embodying one aspect of the present invention generally indicated at 10 in FIG. 1, includes a frame including a pair of opposed spaced side plates 60, 70, four magnetic rods 20, 30, 40, and 50 are spacedly secured within the side plates 60,70 in a way that the four magnetic rods 20, 30, 40, and 50 are parallel to each other and in a common plane. In this embodiment, the magnetic rods 20 and 40 are identical in material, size, and internal structure, and the magnetic rods 30 and 50 are identical in material, size, and internal structure. Therefore, the following will only give a detailed description of the first magnetic rod 20 and the second magnetic rod 30.

[0019] The first magnetic rod 20, as shown in FIGS. 3-4, includes a first tubular body 22 made of non-magnetic material such as stainless steel, titanium alloy, copper alloy or aluminum alloy, five first magnetic members 24 made of NdFeB magnets, and four first spacers 26 made of high magnetic permeability or high saturation magnetization materials such as pure iron, low carbon steel or iron-cobalt alloy. The first tubular body 22 has a chamber 220 with two closed ends 222, 224 and a longitudinal axis X-X. Each first magnetic member 24 is disposed with like poles adjacent each other, such as North-South, South-North, North-South, South-North North-South, in the chamber 220 along the longitudinal axis X-X. Each first spacer 26 is disposed between the two adjacent first magnetic members 24.

[0020] In general, the first tubular body 22 has a length of about 60 mm to 2500 mm, an outer diameter of about 25 mm to 100 mm, and an inner diameter of about 24 mm to 100 mm. The numbers and dimensions of the first magnetic members 24 and the first spacers 26 are designed to match the dimensions of the tubular body 22.

[0021] In this embodiment, the chamber 220 of the first tubular body 22 has a length of about 212 mm, an outer diameter of about 25 mm, and an inner diameter of about 24 mm. Each first magnetic member 24 has a first width D1 in the longitudinal axis X-X of about 40 mm and an outer diameter of slightly less than 24 mm. Each first spacer 26 has a second width D2 in the longitudinal axis X-X of about 3 mm, and an outer diameter of slightly less than 24 mm. The first width D1 of each first magnetic member 24 is of about 13 times the second width D2 of each first spacer 26.

[0022] The second magnetic rod 30, as shown in FIG. 4, includes a second tubular body 32 made of non-magnetic material such as stainless steel, titanium alloy, copper alloy or aluminum alloy, five second magnetic members 34 made of NdFeB magnets, and four second spacers 36 made of high magnetic permeability or high saturation magnetization materials such as pure iron, low carbon steel or iron-cobalt alloy. The second tubular body 32 has a chamber 320 with two closed ends 322, 324 and a longitudinal axis Y-Y. The second magnetic members 34 are disposed in the chamber 320 along the longitudinal axis Y-Y in such a way that the like poles of the adjacent magnetic members 34 are opposed to each other and the poles of the second magnetic members 34 are opposite to the poles of the nearest adjacent first magnetic members 24, such as South-North, North-South, South-North, North-South, South-North. Each second spacer 36 is disposed between the two adjacent second magnetic members 34. In this embodiment, the second tubular body 32 has the same size as the first tubular body 22. In other words, the second tubular body 32 has a length of about 212 mm, an outer diameter of about 25 mm, and an inner diameter of about 24 mm. Each second magnetic member 34 has a third width in the longitudinal axis Y-Y of about 40 mm and an outer diameter of slightly less than 24 mm. Each second spacer 36 has a fourth width in the longitudinal axis Y-Y of about 3 mm, and an outer diameter of slightly less than 24 mm. The third width of each second magnetic member 34 is of about 13 times the fourth width of each second spacer 36.

[0023] The structure and size of the magnetic rod 40 are the same as those of the magnetic rod 20. And the structure and size of the magnetic rod 50 are the same as those of the magnetic rod 30. Thus, it will not be detailedly described here.

[0024] As shown in FIG. 4, the magnetic flux lines produced by each first magnetic member 24 of the first magnetic rod 20 is indicated at A1, the magnetic flux lines produced by each second magnetic member 34 of the second magnetic rod 30 is indicated at A2, and the magnetic flux lines produced by the poles of each first magnetic members 24 and each nearest adjacent second magnetic members 34 is indicated at B so that a matrix type magnetic flux lines can be formed by the grate magnetic separator 10.

[0025] When a magnetic field detection card is put over the grate magnetic separator 10, as shown in FIG. 5, the image of the matrix type magnetic flux lines will be clearly displayed in green fluorescent light. In other words, the magnetic flux lines produced by the grate magnetic separator 10 are like a lot of fine meshes, and can effectively captured unwanted ferrous metals during the processing of raw materials. Particularly, the maximum magnetic flux density of the grate magnetic separator 10 is approximately greater than or equal to 13,700 Gs.