A MATERIAL BREAKING DEVICE

Abstract

Invention relates to material breaking or milling devices for ultra-fine milling of materials. A material breaking device comprises a frame structure (1) with an upper bracket (1A) and a lower bracket (1B); a tubular housing (4) arranged between said brackets (1A, 1B). The tubular housing (4) is attached to said frame structure (1) in rotatable manner such that the tubular housing (4) rotates relative to the frame structure (1). The material breaking device further comprises at least one conical distributor (5) arranged in the tubular housing (4) and at least one outlet cone (7) arranged in the tubular housing (4) downstream from the conical distributor (5). The device further comprises a permanent magnet unit (9) attached to the tubular housing (4) such that at least two permanent magnet units (9) are provided for each milling chamber (6, 8) for creating rotating magnetic field within the milling chambers (6, 8).

Claims

1. A material breaking device comprising: a frame structure (1) with an upper bracket (1A) and a lower bracket (1B) for support of other elements of the material breaking device; an inlet tube (2) fixedly attached to the upper bracket (1A); an outlet tube (3) fixedly attached to the lower bracket (1B); a tubular housing (4) arranged between said brackets (1A, 1B), wherein the tubular housing (4) is attached to the inlet tube (2) for receiving particles to be milled and to the outlet tube (3) for output of milled particles, wherein the tubular housing (4) is attached to said tubes (2, 3) in a rotatable manner such that the tubular housing (4) can rotate relative to the frame structure (1); at least one conical distributor (5) arranged in the tubular housing (4) and comprising recesses (5A) therearound allowing particles to pass along said conical distributor (5), wherein the conical distributor (5) defines a first milling chamber (6); at least one outlet cone (7) arranged in the tubular housing (4) downstream from the conical distributor (5) and comprising a through hole (7A) allowing particles to pass through said outlet cone (7), wherein the outlet cone (7) defines a second milling chamber (8); a permanent magnet unit (9) comprising a permanent magnet (10) and the permanent magnet unit (9) is attached to the tubular housing (4) such that at least two permanent magnet units (9) are provided for each milling chamber (6, 8); a drive unit for providing rotation of the tubular housing (4) relative to the frame structure (1), the inlet tube (2) and the outlet tube (3) creating rotating magnetic field within the milling chambers (6, 8).

2. The material breaking device according to claim 1, characterized in that at each milling chamber (6, 8) two permanent magnet units (9) are positioned facing each other such that the permanent magnet (10) of one permanent magnet unit (9) faces another permanent magnet (10) of another permanent magnet unit (9) with the same magnetic pole.

3. The material breaking device according to claim 1, characterized in that the permanent magnet unit (9) further comprises a gap adjustment means to control a distance between the permanent magnet (10) and the tubular housing (4) such that magnetic field generated by the permanent magnet (10) can be adjusted.

4. The material breaking device according to claim 1, characterized in that the conical distributor (5) is in the shape of concave cone.

5. The material breaking device according to claim 1, characterized in that the recesses (5A) of the conical distributor (5) are arranged therearound at a base portion (5B) of the conical distributor (5).

6. The material breaking device according to claim 1, characterized in that the outlet cone (7) is in the shape of concave cone.

7. The material breaking device according to claim 1, characterized in that the through hole (7A) of the outlet cone (7) extends along the central axis of the outlet cone (7).

8. The material breaking device according to claim 1, characterized in that the conical distributor (5) is fixedly attached to the tubular housing (4).

9. The material breaking device according to claim 1, characterized in that the outlet cone (7) is fixedly attached to the tubular housing (4).

10. The material breaking device according to claim 1, characterized in that the conical distributor (5) and the outlet cone (7) define a pair of milling chambers (6, 8), wherein the tubular housing (4) comprises at least one pair of the conical distributor (5) and the outlet cone (7), preferably from three to six pairs of the conical distributor (5) and the outlet cone (7), more preferably five pairs of conical distributor (5) and the outlet cone (7).

11. The material breaking device according to claim 1, characterized in that the tubular housing (4), the conical distributor (5), the outlet cone (7) are coaxially aligned on the central axis (X) of the material breaking device.

12. The material breaking device according to claim 1, characterized in that the first milling chamber (6) or/and the second milling chamber (8) contains milling particles made of magnetic material.

13. A method for breaking material using the material breaking device according to claim 1, wherein the method comprises the following steps: feeding of particles to be milled into a tubular housing (4) through an inlet tube (2); providing rotation of the tubular housing (4) relative to a frame structure (1) in result of which a rotational magnetic field is created within the tubular housing (4), especially within a first milling chamber (6) and a second milling chamber (8) in the tubular housing (4) such that particles are set into a further motion against an inner wall of the tubular housing (4), a conical distributor (5) and an outlet cone (7) that facilitates breaking of said particles; providing milling particles made of magnetic material into the first milling chamber (6) and/or the second milling chamber (8) to facilitate the milling process; and providing outlet of milled particles through an outlet tube (3).

14. The method according to claim 13, characterized in that in the step of feeding the particles a pressurized fluid is also fed into the tubular housing (4).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0020] These and other objects and advantages of the invention and a better understanding of the principles and details of the invention will be evident from the following description taken in connection with the following drawings in which:

[0021] FIG. 1 illustrates a material breaking device.

[0022] FIG. 2 illustrates an upper part of the material breaking device.

[0023] FIG. 3 illustrates a lower part of the material breaking device.

[0024] FIG. 4 illustrates the material breaking device is a side view.

[0025] FIG. 5 illustrates a cross section of a material breaking device taken along a plane C-C of FIG. 4.

[0026] FIG. 6 illustrates a detailed view of the material breaking device taken in section D of FIG. 5.

[0027] FIG. 7 illustrates a conical distributor 4 with recesses around perimeter of thereof.

[0028] FIG. 8 illustrates an outlet cone 9 with a hole in the centre of thereof.

[0029] FIG. 9 illustrates a permanent magnet unit 7 without inserted permanent magnet 5.

DETAILED DESCRIPTION

[0030] A material breaking device comprises a frame structure 1 with an upper bracket 1A and a lower bracket 1B for support of other elements of the material breaking device (FIGS. 1 to 4). Said elements are an inlet tube 2 fixedly attached to the upper bracket 1A and an outlet tube 3 fixedly attached to the lower bracket 1B.

[0031] The material breaking device further comprises a tubular housing 4 arranged between the upper bracket 1A and the lower bracket 1B. The tubular housing 4 is attached to the inlet tube 2 for receiving particles to be milled and to the outlet tube 3 for output of milled particles, wherein the tubular housing 4 is attached to said tubes 2 and 3 in a rotatable manner such that the tubular housing 4 can rotate relative to the frame structure. The inlet tube 2 further comprises a hopper 11 for ease of material feeding.

[0032] The tubular housing further comprises at least one conical distributor 5 fixedly attached to the tubular housing 4 and comprising recesses 5A therearound allowing particles to pass along said conical distributor 5, wherein the conical distributor 5 defines a first milling chamber 6. The conical distributor 5 is in the shape of concave cone. The recesses 5A of the conical distributor 5 are arranged therearound at a base portion 5B of the conical distributor 5 creating a channels for particles movement from one milling chamber to another one (FIGS. 5, 6 and 7).

[0033] The tubular housing 4 further comprises at least one outlet cone 7 also fixedly attached to tubular housing 4 downstream from the conical distributor 5 and comprising a through hole 7A allowing particles to pass through said outlet cone 7, wherein the outlet cone 7 defines a second milling chamber 8. The outlet cone 7 is in the shape of concave cone. The through hole 7A of the outlet cone 7 extends along the central axis of the outlet cone 7 (FIGS. 5, 6 and 8).

[0034] The material breaking device further comprises permanent magnet units 9 where each unit 9 comprises a permanent magnet 10 and the permanent magnet unit 9 is attached to the tubular housing 4 such that at least two permanent magnet units 9 are provided for each milling chamber 6, 8. Two permanent magnet units 9 are positioned at each milling chamber 6 and 8 facing each other such that the permanent magnet 1 of one permanent magnet unit 9 faces another permanent magnet 10 of another permanent magnet unit 9 with the same magnetic pole. (FIGS. 1 to 6 and 9). The rotational movement is provided by a drive unit. The unit provides rotation of the tubular housing 4 relative to the frame structure 1, the inlet tube 2 and the outlet tube 3 creating rotating magnetic field within the milling chambers 6 and 8.

[0035] The permanent magnet unit 9 further comprises a gap adjustment means to control a distance between the permanent magnet 10 and the tubular housing 4 such that magnetic field generated by the permanent magnet 10 can be adjusted.

[0036] FIGS. 1, 4 and especially FIG. 5 illustrate the material breaking device having five pairs of conical distributor 5 and the outlet cone 7.

References in the FIGS.

[0037] 1a frame structure;

[0038] 1Aan upper bracket;

[0039] 1Ba lower bracket;

[0040] 2an inlet tube;

[0041] 3an outlet tube;

[0042] 4a tubular housing;

[0043] 5a conical distributor;

[0044] 5Aa recess of the conical distributor 5;

[0045] 5Ba base portion of the conical distributor 5;

[0046] 6a first milling chamber;

[0047] 7an outlet cone;

[0048] 7Aa through hole of the outlet cone 7;

[0049] 8a second milling chamber;

[0050] 9a permanent magnet unit;

[0051] 10a permanent magnet;

[0052] 11a hopper;

[0053] Xa central axis of the tubular housing 4.