CN213287901U - Coal washing device for coal mining - Google Patents
Coal washing device for coal mining Download PDFInfo
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- CN213287901U CN213287901U CN202021466123.1U CN202021466123U CN213287901U CN 213287901 U CN213287901 U CN 213287901U CN 202021466123 U CN202021466123 U CN 202021466123U CN 213287901 U CN213287901 U CN 213287901U
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- coal
- coal washing
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- connecting frame
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- 239000003245 coal Substances 0.000 title claims abstract description 128
- 238000005406 washing Methods 0.000 title claims abstract description 85
- 238000005065 mining Methods 0.000 title claims abstract description 20
- 238000011084 recovery Methods 0.000 claims abstract description 20
- 238000004064 recycling Methods 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 8
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 8
- 241001330002 Bambuseae Species 0.000 claims description 8
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 8
- 239000011425 bamboo Substances 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 abstract description 5
- 239000010865 sewage Substances 0.000 abstract description 5
- 238000004140 cleaning Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
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Abstract
The utility model belongs to the technical field of coal mining, in particular to a coal washing device for coal mining, which comprises a base, a coal washing box, a recovery box, a connecting cylinder and a circulating pump, wherein the coal washing box is positioned right above the recovery box and is communicated with the recovery box through the connecting cylinder; the coal washing machine also comprises a coal washing net barrel, a mounting plate, a movable connecting frame, a rotating motor and an upright post, wherein the upright post is rotatably mounted on the top surface of the base, and the movable connecting frame is mounted on the upright post in a manner of moving up and down; the coal washing net barrel comprises a movable half barrel and a fixed half barrel which are symmetrically distributed; a filter screen is erected in the recovery box; the coal washing device for coal mining of the utility model is provided with the centrifugal coal washing net cylinder, and the coal washing net cylinder comprises the movable half cylinder and the fixed half cylinder, and is matched with the lifting assembly, thereby being easy for feeding and discharging of coal mines and improving the coal washing efficiency; the recycling box can recycle sewage, and the sewage is guided into the coal washing box for recycling after being filtered by the filter screen, so that the utilization rate of water resources is improved.
Description
Technical Field
The utility model belongs to the technical field of coal mining, concretely relates to coal washing device that coal mining adopted.
Background
The coal mine is a region where people mine coal resources in a coal-rich mining area, and is generally divided into a minery coal mine and an open coal mine, when a coal seam is far away from the ground surface, coal is generally selected to dig a tunnel underground, the minery coal mine is the minery coal mine, when the coal seam is very close to the ground surface, the direct stripping of a surface soil layer is generally selected to dig the coal, the open coal mine is the open coal mine, most coal mines in China belong to the minery coal mine, the coal mine range comprises the large region of the ground underground and related facilities, the coal mine is a reasonable space excavated by people when digging a geological layer rich in the coal, the coal mine generally comprises a tunnel, a well cave, a digging surface and the like, and coal washing is a step which the new coal mine must pass through, and impurities such as soil in the new coal mine can.
The coal washing device that original coal mining adopted is when using, and the last unloading of colliery material is all very troublesome, and the tradition adopts the bucket elevator material loading, but is difficult to guarantee the material loading volume, influences the efficiency of coal washing.
SUMMERY OF THE UTILITY MODEL
For solving the above-mentioned problem that exists among the prior art, the utility model provides a coal washing device that coal mining adopted has convenient to use and the characteristics of unloading easily on.
In order to achieve the above object, the utility model provides a following technical scheme: a coal washing device for coal mining comprises a base, a coal washing box, a recovery box, a connecting cylinder and a circulating pump, wherein a manual valve is arranged on the connecting cylinder; the recycling tank and the circulating pump are both arranged on the top surface of the base, a water inlet of the circulating pump is communicated with the recycling tank through a pipeline, and a water outlet of the circulating pump is communicated with the coal washing tank through a pipeline; the coal washing box is positioned right above the recovery box and is communicated with the recovery box through a connecting cylinder; the coal washing machine is characterized by further comprising a coal washing net barrel, a mounting plate, a movable connecting frame, a rotating motor and an upright post, wherein the upright post is rotatably mounted on the top surface of the base, and a driving assembly for driving the upright post to rotate is mounted on the base; the movable connecting frame is arranged on the upright post in a vertically movable manner, and a lifting assembly for driving the movable connecting frame to move is arranged on the upright post; the mounting plate is positioned below the movable connecting frame, the rotating motor is mounted on the top surface of the movable connecting frame, an output shaft of the rotating motor penetrates through the movable connecting frame and then is fixedly connected with the mounting plate, and the coal washing net barrel is mounted on the bottom surface of the mounting plate; the coal washing net barrel comprises a movable half barrel and a fixed half barrel which are symmetrically distributed; a filter screen is erected in the recycling box.
As an optimized technical scheme of the utility model, still include electric putter, electric putter installs the mounting panel bottom surface, just electric putter's piston rod with half a fixed connection of activity.
As a preferred technical scheme of the utility model, the driving assembly comprises a driving motor, a gear ring and a rotary seat, the rotary seat is supported and installed on the top surface of the base through a bearing, and the upright post is fixed on the top end of the rotary seat; the driving motor is installed on the top surface of the base, the gear is fixed on an output shaft of the driving motor, and the gear ring is fixed on the periphery of the outer wall of the upright column and is meshed with the gear.
As a preferred technical solution of the present invention, the lifting assembly includes a lifting motor, a limiting slider and a threaded rod, the outer wall of the upright post is provided with a limiting chute distributed along the longitudinal direction, the end of the movable connecting frame is fixed with the limiting slider, and the limiting slider is embedded in the limiting chute and can move along the limiting chute; the threaded rod is arranged in the limiting sliding groove through a bearing supporting frame, and the lifting motor is fixed at the top end of the upright post and drives the threaded rod to rotate; and a threaded hole is formed in the limiting sliding block, and the threaded rod is connected with the limiting sliding block in a threaded screwing way through the threaded hole.
As a preferred technical scheme of the utility model, the front of the recycling bin is hinged with a sealing door; two symmetrically distributed support rails are fixed on the inner wall of the recovery box, the longitudinal section of each support rail is of a structure shaped like the Chinese character 'Contraband', and the outer wall of the filter screen is fixed with an inserting strip which is embedded into the inner side of each support rail and can move along the support rails.
As an optimal technical scheme of the utility model, the bottom surface of mounting panel is fixed with two symmetric distribution's spacing slide rail, and the vertical tangent plane of this spacing slide rail is "L" type structure the top surface of half section of thick bamboo of activity is fixed with spacing slide, and the vertical tangent plane of this spacing slide is "T" type structure, just two spacing slide rail inboards of spacing slide rail of embedding can be followed spacing slide rail removes.
Compared with the prior art, the beneficial effects of the utility model are that: the coal washing device for coal mining of the utility model is provided with the centrifugal coal washing net cylinder, and the coal washing net cylinder comprises the movable half cylinder and the fixed half cylinder, and is matched with the lifting assembly, thereby being easy for feeding and discharging of coal mines and improving the coal washing efficiency; the recycling box can recycle sewage, and the sewage is guided into the coal washing box for recycling after being filtered by the filter screen, so that the utilization rate of water resources is improved.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic front structural view of the driving assembly of the present invention;
fig. 3 is a front sectional structural schematic view of a lifting assembly of the present invention;
FIG. 4 is a schematic front sectional view of a recycling bin according to the present invention;
FIG. 5 is a schematic axial side structure view of a coal washing net barrel of the present invention;
FIG. 6 is a schematic side view of a coal washing net cylinder of the present invention;
in the figure: 1. a base; 2. a coal washing box; 3. a recycling bin; 4. a connecting cylinder; 5. a manual valve; 6. a circulation pump; 7. a coal washing net cylinder; 8. mounting a plate; 9. a movable connecting frame; 10. a rotating electric machine; 11. an electric push rod; 12. a column; 13. a lifting assembly; 14. a drive assembly; 15. a sealing door; 16. a drive motor; 17. a gear; 18. a ring gear; 19. a rotating base; 20. lifting a motor; 21. a limiting slide block; 22. a limiting chute; 23. a threaded rod; 24. a threaded hole; 25. supporting a rail; 26. cutting; 27. filtering with a screen; 28. a movable half cylinder; 29. fixing the half cylinder; 30. a limiting sliding plate; 31. and limiting sliding rails.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-6, the present invention provides the following technical solutions: a coal washing device for coal mining comprises a base 1, a coal washing box 2, a recovery box 3, a connecting cylinder 4 and a circulating pump 6, wherein a manual valve 5 is arranged on the connecting cylinder 4; the recovery tank 3 and the circulating pump 6 are both arranged on the top surface of the base 1, the water inlet of the circulating pump 6 is communicated with the recovery tank 3 through a pipeline, and the water outlet of the circulating pump 6 is communicated with the coal washing tank 2 through a pipeline; the coal washing box 2 is positioned right above the recovery box 3 and is communicated with the recovery box 3 through a connecting cylinder 4; the coal washing machine also comprises a coal washing net drum 7, a mounting plate 8, a movable connecting frame 9, a rotating motor 10 and an upright post 12, wherein the upright post 12 is rotatably mounted on the top surface of the base 1, and a driving assembly 14 for driving the upright post 12 to rotate is mounted on the base 1; the movable connecting frame 9 is arranged on the upright post 12 in a way of moving up and down, and a lifting assembly 13 for driving the movable connecting frame 9 to move is arranged on the upright post 12; the mounting plate 8 is positioned below the movable connecting frame 9, the rotating motor 10 is arranged on the top surface of the movable connecting frame 9, an output shaft of the rotating motor 10 penetrates through the movable connecting frame 9 and then is fixedly connected with the mounting plate 8, and the coal washing net barrel 7 is arranged on the bottom surface of the mounting plate 8; the coal washing net cylinder 7 comprises a movable half cylinder 28 and a fixed half cylinder 29 which are symmetrically distributed; a filter screen 27 is erected in the recycling box 3, when in use, a proper amount of cleaning water is injected into the coal washing box 2, the position of the attached drawing 1 is taken as reference, the movable connecting frame 9 is ensured to be positioned at the lower position of the left side of the upright post 12, a coal mine to be washed is conveyed into the coal washing net cylinder 7, the coal washing net cylinder 7 is lifted to a proper height position by using the lifting component 13, then the movable connecting frame 9 is rotated by using the driving component 14, the movable connecting frame 9 is rotated to the upper position of the right side of the upright post 12, the coal washing net cylinder 7 is positioned right above the coal washing box 2, the lifting component 13 is started again to lower the coal washing net cylinder 7, the coal washing net cylinder 7 enters the cleaning water of the coal washing box 2, then the rotating motor 10 is started to drive the coal washing net cylinder 7 to rotate for centrifugal washing, after the washing is finished, the lifting component 13 is started first to lift the coal washing net cylinder 7, then the movable connecting frame 9 is rotated by using the, the movable connecting frame 9 is rotated to the upper position of the left side of the upright post 12, then the lifting assembly 13 is started to lower the coal washing net cylinder 7 to a proper height, the movable half cylinder 28 moves towards the direction that the fixed half cylinder 29 is far away from, the movable half cylinder 28 is separated from the fixed half cylinder 29, namely, discharging can be carried out, and the coal washing machine is very convenient to use.
Specifically, as shown in fig. 1 and fig. 5, in this embodiment, the electric pushing rod 11 is further included, the electric pushing rod 11 is installed on the bottom surface of the mounting plate 8, a piston rod of the electric pushing rod 11 is fixedly connected with the movable half cylinder 28, when discharging is performed, the electric pushing rod 11 is turned on, the movable half cylinder 28 is pulled by the electric pushing rod 11 to move, the movable half cylinder 28 and the fixed half cylinder 29 can be separated, a cleaning device is cleaned, the electric pushing rod 11 pushes the movable half cylinder 28 to be attached to the fixed half cylinder 29, wherein the electric pushing rod 11 is an SC series, and can be purchased directly on the market, and needs to be connected with an electric power supply when in.
Specifically, according to fig. 1 and fig. 2, in the present embodiment, the driving assembly 14 includes a driving motor 16, a gear 17, a gear ring 18 and a rotating base 19, the rotating base 19 is supported and installed on the top surface of the base 1 through a bearing, and the upright 12 is fixed at the top end of the rotating base 19; the driving motor 16 is installed on the top surface of the base 1, the gear 17 is fixed on the output shaft of the driving motor 16, the gear ring 18 is fixed on the periphery of the outer wall of the upright post 12 and is meshed with the gear 17 to be connected, when the movable connecting frame 9 is driven to rotate, the driving motor 16 is started, the gear 17 is driven to rotate by the driving motor 16, under the meshing relation, the upright post 12 can be driven to rotate through the gear ring 18, so that the movable connecting frame 9 is driven to rotate, wherein the driving motor 16 is a Y-series three-phase asynchronous motor, can be purchased directly on the market, and needs to be connected with an electric power.
Specifically, as shown in fig. 1 and fig. 3, in this embodiment, the lifting assembly 13 includes a lifting motor 20, a limiting slide block 21 and a threaded rod 23, a limiting slide groove 22 longitudinally distributed is formed on an outer wall of the upright post 12, the limiting slide block 21 is fixed at an end of the movable connecting frame 9, and the limiting slide block 21 is embedded in the limiting slide groove 22 and can move along the limiting slide groove 22; the threaded rod 23 is arranged in the limiting chute 22 through a bearing support frame, and the lifting motor 20 is fixed at the top end of the upright post 12 and drives the threaded rod 23 to rotate; the limiting slide block 21 is internally provided with a threaded hole 24, the threaded rod 23 is connected with the limiting slide block 21 in a threaded screwing manner through the threaded hole 24, when the movable connecting frame 9 is lifted, the lifting motor 20 is started, the threaded rod 23 is driven to rotate by the lifting motor 20, under the action of the threaded screwing manner, the movable connecting frame 9 can be driven to move along the limiting sliding groove 22 through the limiting slide block 21, wherein the lifting motor 20 is a Y-series three-phase asynchronous motor, can be directly purchased in the market, and needs to be connected with an electric power supply during use.
Specifically, according to fig. 1 and 4, in the present embodiment, a sealing door 15 is hinged to the front surface of the recycling bin 3; two symmetrically-distributed support rails 25 are fixed on the inner wall of the recycling box 3, the longitudinal section of each support rail 25 is in a structure shaped like a Chinese character 'Contraband', inserting strips 26 are fixed on the outer wall of the filter screen 27, the inserting strips 26 are embedded into the inner sides of the support rails 25 and can move along the support rails 25, when the filter screen 27 needs to be cleaned, the sealing door 15 is opened, and the filter screen 27 can be directly drawn out, so that the recycling box is very convenient.
Specifically, according to fig. 1 and fig. 6, in this embodiment, two limiting slide rails 31 are fixed to the bottom surface of the mounting plate 8, the longitudinal section of each limiting slide rail 31 is of an "L" type structure, a limiting slide plate 30 is fixed to the top surface of the movable half cylinder 28, the longitudinal section of each limiting slide plate 30 is of a "T" type structure, the limiting slide plates 30 are embedded into the inner sides of the two limiting slide rails 31 and can move along the limiting slide rails 31, and when the movable half cylinder 28 moves, the movable half cylinder 28 can move along the limiting slide rails 31 through the limiting slide plates 30, so that the movable half cylinder 28 can move stably.
The utility model discloses a theory of operation and use flow: the utility model discloses a coal washing device that coal mining adopted, when using, earlier inject proper amount of cleaning water in washing coal tank 2, use the position that attached figure 1 is located as the reference, guarantee that swing joint frame 9 is located the left side lower part position of stand 12, will wait to wash the coal mine and carry to washing in the coal net section of thick bamboo 7, utilize lifting assembly 13 to promote coal washing net section of thick bamboo 7 to suitable high position, it rotates swing joint frame 9 to recycle drive assembly 14, make swing joint frame 9 rotate to the right side upper portion position of stand 12, make coal washing net section of thick bamboo 7 be in washing coal tank 2 directly over, restart lifting assembly 13 and lower coal washing net section of thick bamboo 7, make coal washing net section of thick bamboo 7 get into wash coal tank 2 in the clean water can, restart rotating electrical machines 10 drive coal washing net section of thick bamboo 7 and rotate, carry out centrifugal cleaning;
after cleaning, firstly starting the lifting component 13 to lift the coal washing net cylinder 7, then utilizing the driving component 14 to rotate the movable connecting frame 9, enabling the movable connecting frame 9 to rotate to the upper position of the left side of the upright post 12, then starting the lifting component 13 to lower the coal washing net cylinder 7 to a proper height, starting the electric push rod 11 to enable the movable half cylinder 28 to move towards the direction away from the fixed half cylinder 29, enabling the movable half cylinder 28 and the fixed half cylinder 29 to be separated, and then discharging can be carried out, so that convenience is brought;
in addition, the manual valve 5 is opened, all the sewage in the coal washing tank 2 enters the recovery tank 3 and is filtered by the filter screen 27, and when the coal washing tank needs to be used, the manual valve 5 is closed, the circulating pump 6 is started, and the circulating pump 6 lifts the filtered water to the coal washing tank 2 again for recycling.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a coal washing device that coal mining adopted, includes base (1), its characterized in that: the coal washing device also comprises a coal washing box (2), a recovery box (3), a connecting cylinder (4) and a circulating pump (6), wherein a manual valve (5) is arranged on the connecting cylinder (4); the recycling tank (3) and the circulating pump (6) are both arranged on the top surface of the base (1), the water inlet of the circulating pump (6) is communicated with the recycling tank (3) through a pipeline, and the water outlet of the circulating pump is communicated with the coal washing tank (2) through a pipeline; the coal washing box (2) is positioned right above the recovery box (3) and is communicated with the recovery box (3) through a connecting cylinder (4); the coal washing machine is characterized by further comprising a coal washing net barrel (7), a mounting plate (8), a movable connecting frame (9), a rotating motor (10) and an upright post (12), wherein the upright post (12) is rotatably mounted on the top surface of the base (1), and a driving assembly (14) for driving the upright post (12) to rotate is mounted on the base (1); the movable connecting frame (9) is arranged on the upright post (12) in a vertically movable manner, and a lifting assembly (13) for driving the movable connecting frame (9) to move is arranged on the upright post (12); the mounting plate (8) is positioned below the movable connecting frame (9), the rotating motor (10) is mounted on the top surface of the movable connecting frame (9), an output shaft of the rotating motor (10) penetrates through the movable connecting frame (9) and then is fixedly connected with the mounting plate (8), and the coal washing net barrel (7) is mounted on the bottom surface of the mounting plate (8); the coal washing net barrel (7) comprises a movable half barrel (28) and a fixed half barrel (29) which are symmetrically distributed; a filter screen (27) is erected in the recovery box (3).
2. A coal washing apparatus for coal mining as claimed in claim 1 wherein: still include electric putter (11), electric putter (11) are installed mounting panel (8) bottom surface, just the piston rod of electric putter (11) with activity half a section of thick bamboo (28) fixed connection.
3. A coal washing apparatus for coal mining as claimed in claim 1 wherein: the driving assembly (14) comprises a driving motor (16), a gear (17), a gear ring (18) and a rotating seat (19), the rotating seat (19) is supported and installed on the top surface of the base (1) through a bearing, and the upright post (12) is fixed at the top end of the rotating seat (19); the driving motor (16) is installed on the top surface of the base (1), the gear (17) is fixed on an output shaft of the driving motor (16), and the gear ring (18) is fixed on the periphery of the outer wall of the upright post (12) and is meshed with the gear (17).
4. A coal washing apparatus for coal mining as claimed in claim 1 wherein: the lifting assembly (13) comprises a lifting motor (20), a limiting sliding block (21) and a threaded rod (23), the outer wall of the upright post (12) is provided with a limiting sliding groove (22) which is longitudinally distributed, the end part of the movable connecting frame (9) is fixedly provided with the limiting sliding block (21), and the limiting sliding block (21) is embedded into the limiting sliding groove (22) and can move along the limiting sliding groove (22); the threaded rod (23) is arranged in the limiting sliding groove (22) through a bearing supporting frame, and the lifting motor (20) is fixed at the top end of the upright post (12) and drives the threaded rod (23) to rotate; a threaded hole (24) is formed in the limiting sliding block (21), and the threaded rod (23) is connected with the limiting sliding block (21) in a threaded manner through the threaded hole (24).
5. A coal washing apparatus for coal mining as claimed in claim 1 wherein: the front surface of the recovery box (3) is hinged with a sealing door (15); two symmetrically distributed support rails (25) are fixed on the inner wall of the recovery box (3), the longitudinal section of each support rail (25) is in a structure shaped like the Chinese character 'Contraband', and the outer wall of the filter screen (27) is fixed with an inserting strip (26), wherein the inserting strip (26) is embedded into the inner side of each support rail (25) and can move along the support rails (25).
6. A coal washing apparatus for coal mining as claimed in claim 1 wherein: the bottom surface of the mounting plate (8) is fixed with two limiting slide rails (31) which are symmetrically distributed, the longitudinal section of each limiting slide rail (31) is of an L-shaped structure, a limiting slide plate (30) is fixed on the top surface of the movable half cylinder (28), the longitudinal section of each limiting slide plate (30) is of a T-shaped structure, and the limiting slide plates (30) are embedded into the inner sides of the two limiting slide rails (31) and can move along the limiting slide rails (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021466123.1U CN213287901U (en) | 2020-07-23 | 2020-07-23 | Coal washing device for coal mining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021466123.1U CN213287901U (en) | 2020-07-23 | 2020-07-23 | Coal washing device for coal mining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213287901U true CN213287901U (en) | 2021-05-28 |
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ID=76021068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021466123.1U Active CN213287901U (en) | 2020-07-23 | 2020-07-23 | Coal washing device for coal mining |
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| Country | Link |
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| CN (1) | CN213287901U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115646921A (en) * | 2022-10-28 | 2023-01-31 | 江西粤磁稀土新材料科技有限公司 | Surface cleaning device for rust removal of neodymium iron boron magnet material |
-
2020
- 2020-07-23 CN CN202021466123.1U patent/CN213287901U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115646921A (en) * | 2022-10-28 | 2023-01-31 | 江西粤磁稀土新材料科技有限公司 | Surface cleaning device for rust removal of neodymium iron boron magnet material |
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