Device and method for preparing sintering-free reactive sintering silicon carbide

Abstract

The invention relates to the technical field of material processing, in particular to a sintering-free reactive sintering silicon carbide preparation device and method.The preparation device comprises a supporting bottom plate, a smelting mechanism, a supporting circular ring, a swing mechanism and a transposition piece; after an operator places raw materials on the smelting mechanism, the raw materials are heated through the smelting mechanism, meanwhile, the swinging mechanism is matched with the supporting circular ring to incline the smelting tank, so that smelting liquid permeates into other areas, low-density powder particles are supported by high-density liquid, and the raw materials which are not smelted fall into the smelting area in advance; and the equipment is simple in structure, effectively solves the problem of heat conduction heating efficiency during sintering of the silicon carbide material, has relatively good practicability and economical efficiency, and is beneficial to popularization and use of the equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of material processing, and in particular to a device and method for preparing firing-free reaction-sintered silicon carbide. Background Art

[0002] The firing-free reaction treatment sintered silicon carbide mainly utilizes electrode rods to fire the silicon carbide raw materials, usually using equipment such as resistance furnaces, and then the liquid phase material is cast to fix the morphological structure. Since the resistance furnace and other equipment heat the heat through heat transfer, part of the raw materials have been heated into liquid, and the rest far away from the electrode heating point is still in the basic form, resulting in a large waste of resources and production efficiency problems. Summary of the invention

[0003] In order to solve the above problems existing in the prior art, the purpose of the present invention is to provide a device and method for preparing silicon carbide by reaction sintering without firing, which effectively solves the sintering problem of raw materials far away from the electrode heating point and helps the raw materials to be mixed and formed into silicon carbide.

[0004] The technical solution adopted by the present invention is: a device for preparing non-firing reaction-sintered silicon carbide, comprising a supporting bottom plate, a smelting mechanism being arranged on the supporting bottom plate, the smelting mechanism comprising a smelting pot, a movable rolling ball being arranged at the bottom of the smelting pot, a supporting base being arranged on the supporting bottom plate, the movable rolling ball being rollingly connected to the supporting base, a plurality of smelting electrodes being arranged in the smelting pot, and the smelting pot being driven to swing so that the material in the smelting pot is close to the smelting electrodes.

[0005] In one embodiment, a slope filling is provided in the smelting pot, and the slope filling compensates for the sloped structure of the bottom of the smelting pot.

[0006] In one embodiment, a supporting ring is provided on the outer side of the smelting pot, a gap is left between the supporting ring and the smelting pot, a plurality of supporting rods are provided between the supporting ring and the supporting bottom plate, and a swinging mechanism is provided on the supporting ring, and the swinging mechanism is used to drive the smelting pot toward the supporting ring.

[0007] In one embodiment, the swing mechanism includes a swing frame, which has a rectangular structure, and is arranged on the outer side of the smelting pot. A symmetrically arranged movable block is arranged in the middle of the swing frame, and the swing frame is provided with the movable groove whose guiding direction is the same as the axis of the smelting pot. A connecting ring is arranged in the middle of the swing frame, and the connecting ring is sleeved with the smelting pot. A symmetrically arranged penetrating movable rod is arranged on the connecting ring, and the penetrating movable rod passes through and is slidably connected to the movable groove. The swing mechanism also includes two groups of symmetrically arranged displacement parts, and the two groups of the displacement parts are arranged on the sides of the swing frame where the movable block is not arranged. The displacement parts are used to rotate the relative position of the swing frame and the support ring. A driving part is provided on the displacement part, and the driving part drives the center of the swing frame to deviate from the center of the support ring.

[0008] In one embodiment, the driving member includes a connecting plate, which is arranged on the transposition member, and a rotating disk is provided on the connecting plate. The plane of the rotating disk is parallel to the plane of the supporting base plate, and the rotating axis of the rotating disk passes through and is rotatably connected to the connecting plate. A driving motor is provided on the connecting plate to drive the rotating disk to rotate, and an extension rod is provided in the middle of a side of the swing frame that is not provided on the movable block, and a through rod is provided on the plane of the rotating disk that deviates from the rotating axis, and the through rod passes through and is rotatably connected to the extension rod.

[0009] In one embodiment, the position change member includes two groups of rotating drive wheels, which clamp the inner and outer arc surfaces of the support ring. The rotating axes of the rotating drive wheels pass through and are rotatably connected to the connecting plate. An isolation ball is provided between the connecting plate and the support ring. The isolation ball is rollingly connected to the connecting plate, and the isolation ball abuts against the side surface of the support ring.

[0010] In one embodiment, when the swing mechanism drives the smelting pot to tilt, the end of the smelting electrode is fixed relative to the supporting bottom plate.

[0011] In one embodiment, the smelting electrode stops working when the smelting pot is tilted.

[0012] In one embodiment, a method for preparing non-firing reaction-sintered silicon carbide is also included, and the specific implementation method is as follows:

[0013] S1. Add the raw material powder into the smelting pot and shake it evenly to keep it flat;

[0014] S2. Pass the smelting electrode to heat the raw material powder;

[0015] S3. After the heated part is molten, stop heating and tilt the smelting tank;

[0016] S4. Let the smelting pot stand for a while, and after the unmelted powder covers the molten area, return the smelting pot to its original position and continue heating;

[0017] S5. Repeat steps S3-S4 until all are heated into a fluid state and then released to cool and set, completing the preparation.

[0018] In one embodiment, in step S3, the positions of the multiple tilts are different.

[0019] The beneficial effects of the present invention are as follows: the present invention is an apparatus and method for preparing silicon carbide by reaction sintering without firing, which effectively solves the sintering problem of raw materials far away from the electrode heating part and helps the raw materials to be mixed and formed into silicon carbide. The specific implementation method thereof is as follows:

[0020] The operator first introduces the raw materials into the smelting pot, and then vibrates the materials evenly to make them more compact. Then, the raw materials are heated by the smelting electrode. Due to the heat transfer in the heating area, the raw materials in a part of the range have become liquid. At this time, the driving motor is started to drive the rotating disc to rotate. While the rotating disc rotates, the through rod pushes the extension rod to move the center of the swing frame away from the center of the smelting pot. During the movement of the swing frame, the movable block drives the penetrating movable rod to slide in the movable groove, so that the connecting ring connected by the penetrating movable rod is tilted, and the smelting pot is further driven to tilt, so that the movable ball on the smelting pot rotates on the supporting base, causing the smelting pot to tilt. At the same time, when the smelting pot is tilted, the liquid raw materials are tilted away from the electrode, and the powdered raw materials at the far end are close to the smelting electrode, so that the raw materials at the electrode are replaced and the smelting effect is improved. At the same time, since the smelting pot is provided with a slope filling inside, when the smelting pot is tilted, the amount of raw materials entering the vicinity of the electrode in all directions is not uniform, which can help to use the high quality of the liquid phase to squeeze the low-weight powdered raw materials close to the smelting electrode;

[0021] Since the positions of the slope filling and the smelting pot are fixed, in order to prevent the raw materials on the opposite side of the slope filling from piling up, the rotating driving wheel is started to drive the swing mechanism to rotate the supporting ring, and the smelting pot is swung by the swing mechanism at the same time. After multiple adjustments, the raw materials that are tilted to the slope filling slope can be kept in a horizontal position in the smelting pot, so as to avoid that some parts of the smelting electrode cannot contact the raw materials;

[0022] Since the smelting pot and the connecting ring are sleeved, when the swing mechanism drives the smelting pot to swing, the movable ball cooperates with the supporting base to make the smelting pot produce a self-rotation effect. Cooperating with the movement of the position-changing part, the raw materials can fall into the smelting center of the smelting electrode more easily, further improving the production efficiency, until the raw materials are completely melted into the silicon carbide liquid phase and then flow out to the mold for final shaping.

[0023] The equipment has a simple structure. Through a simple structure, the raw materials in the smelting tank are evenly turned over and dropped near the smelting electrode, thereby ensuring the melting efficiency of the smelting electrode and solving the problem of sintering of raw materials at the end far away from the electrode. It has good practicality and economy, and is beneficial to the promotion and use of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0025] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0026] Figure 2 It is a partial cross-sectional three-dimensional structural schematic diagram of the present invention;

[0027] Figure 3 It is a schematic diagram of the three-dimensional structure of the swing mechanism of the present invention;

[0028] Figure 4 It is a second three-dimensional structural schematic diagram of the swing mechanism of the present invention;

[0029] Figure 5 It is a schematic diagram of the three-dimensional structure of the transposition member of the present invention.

[0030] Description of the drawings: 1. Support bottom plate; 2. Smelting mechanism; 21. Smelting tank; 22. Slope filling; 23. Smelting electrode; 211. Support base; 212. Movable rolling ball; 3. Support ring; 4. Swinging mechanism; 41. Swinging frame; 42. Movable block; 421. Movable groove; 43. Connecting ring; 44. Through-moving rod; 45. Extension rod; 451. Through rod; 452. Driving motor; 46. Rotating disc; 51. Connecting plate; 5. Transposition piece; 52. Rotating driving wheel; 53. Isolation ball. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the embodiments described are only part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0033] Combine the following Figure 1-5 The specific embodiment of the present invention is described. A device for preparing sintered silicon carbide without firing reaction comprises a supporting bottom plate 1. A smelting mechanism 2 is arranged on the supporting bottom plate 1. The smelting mechanism 2 comprises a smelting tank 21. A slope filling 22 is arranged in the smelting tank 21. The slope filling 22 compensates for the sloped structure of the bottom of the smelting tank 21. By setting up a supporting base 211, the smelted liquid penetrates into the powder and flows downward, and the powdered raw materials can be lifted at the same time. A movable rolling ball 212 is arranged at the bottom of the smelting tank 21. A supporting base 211 is arranged on the supporting bottom plate 1. The movable rolling ball 212 is rollingly connected to the supporting base 211. A plurality of smelting electrodes 23 are arranged in the smelting tank 21. The smelting electrode 23 heats the material in the smelting tank 21 by electricity. It is a prior art. With reference to the resistance furnace, it is not repeated here. The smelting tank 21 is driven to swing so that the material in the smelting tank 21 is close to the smelting electrode 23.

[0034] Advantageously, a supporting ring 3 is provided on the outer side of the smelting pot 21, a gap is left between the supporting ring 3 and the smelting pot 21, a plurality of supporting rods are provided between the supporting ring 3 and the supporting bottom plate 1, a swinging mechanism 4 is provided on the supporting ring 3, and the swinging mechanism 4 is used to drive the smelting pot 21 to lean against the supporting ring 3; the swinging mechanism 4 includes a swinging frame 41, the swinging frame 41 has a rectangular structure, the swinging frame 41 is provided on the outer side of the smelting pot 21, a symmetrically arranged movable block 42 is provided in the middle of the swinging frame 41, and a movable groove 421 whose guiding direction is in the same direction as the axis of the smelting pot 21 is provided on the swinging frame 41, a connecting ring 43 is provided in the middle of the swinging frame 41, the connecting ring 43 is sleeved with the smelting pot 21, and a symmetrically arranged penetrating movable rod 44 is provided on the connecting ring 43, and the penetrating movable rod 44 penetrates and is slidably connected to the movable groove 421, and the swinging mechanism 4 also includes two groups of symmetrically arranged transposition members 5, and the two groups of transposition members 5 are provided on the swinging frame 41 where the movable block 42 is not provided. On the side, the position changer 5 is used to rotate the relative position of the swing frame 41 and the support ring 3. The position changer 5 is provided with a driving member, which drives the center of the swing frame 41 to deviate from the center of the support ring 3; the driving member includes a connecting plate 51, which is arranged on the position changer 5, and a rotating disk 46 is arranged on the connecting plate 51. The plane of the rotating disk 46 is parallel to the plane of the support bottom plate 1. The rotating axis of the rotating disk 46 penetrates and is rotatably connected to the connecting plate 51. A driving motor 452 is provided on the connecting plate 51 to drive the rotating disk 46 to rotate. An extension rod 45 is provided in the middle of one side of the swing frame 41 that is not arranged on the movable block 42. A through rod 451 is provided on the plane of the rotating disk 46 that deviates from the rotating axis. The through rod 451 penetrates and is rotatably connected to the extension rod 45; when the swing mechanism 4 drives the smelting pot 21 to tilt, the end of the smelting electrode 23 is fixed relative to the support bottom plate 1, and the smelting electrode 23 stops working when the smelting pot 21 tilts;

[0035] In practice, the driving motor 452 is started to drive the rotating disc 46 to rotate. While the rotating disc 46 rotates, the through rod 451 pushes the extension rod 45 to move the center of the swing frame 41 away from the center of the smelting pot 21. During the movement of the swing frame 41, the movable block 42 drives the penetrating movable rod 44 to slide in the movable groove 421, so that the connecting ring 43 connected to the penetrating movable rod 44 is tilted, and the smelting pot 21 is further driven to tilt, so that the movable ball 212 on the smelting pot 21 rotates on the supporting base 211, causing the smelting pot 21 to tilt, and the rotating driving wheel 52 is started to drive the swing mechanism 4 to rotate the supporting ring 3, and at the same time, the swing mechanism 4 is used to swing the smelting pot 21. After multiple adjustments, the raw materials accumulated on the slope of the slope filling 22 can be kept in a horizontal position in the smelting pot 21, so as to prevent a part of the smelting electrode 23 from being unable to contact the raw materials.

[0036] Advantageously, the transposition member 5 includes two sets of rotating drive wheels 52, which can be rotated by electric drive, and the two sets of rotating drive wheels 52 clamp the inner and outer arc surfaces of the supporting ring 3. The rotating axes of the rotating drive wheels 52 pass through and are rotatably connected to the connecting plate 51. An isolation ball 53 is provided between the connecting plate 51 and the supporting ring 3. The isolation ball 53 is rollingly connected to the connecting plate 51, and the isolation ball 53 abuts against the side of the supporting ring 3.

[0037] A method for preparing non-firing reaction-sintered silicon carbide, the specific implementation method is as follows:

[0038] S1. The raw material powder is added to the smelting tank 21 and shaken evenly to keep it flat;

[0039] S2. The melting electrode 23 is passed to heat the raw material powder;

[0040] S3. After the heated part is molten, the heating is stopped, and the smelting tank 21 is tilted multiple times at different positions;

[0041] S4. Let stand for a certain period of time, until the unmelted powder covers the molten area, and then restore the smelting tank 21 to its original position and continue heating;

[0042] S5. Repeat steps S3-S4 until all are heated into a fluid state and then released to cool and set, completing the preparation.

[0043] Working principle of the present invention:

[0044] In the initial state, the operator first introduces the raw materials into the smelting pot 21, shakes the materials evenly to make them more compact, and then uses the smelting electrode 23 to heat the raw materials. Due to the heat transfer in the heating area, the raw materials in a part of the range have become liquid. At this time, the drive motor 452 is started to drive the rotating disk 46 to rotate. While the rotating disk 46 rotates, the through rod 451 pushes the extension rod 45 to move the center of the swing frame 41 away from the center of the smelting pot 21. During the movement of the swing frame 41, the movable block 42 drives the through movable rod 44 to slide in the movable groove 421, so that the through movable rod 44 is connected to the movable groove 421. The connecting ring 43 is tilted, which further drives the smelting pot 21 to tilt, so that the movable rolling ball 212 on the smelting pot 21 rotates on the supporting base 211, causing the smelting pot 21 to tilt. At the same time, when the smelting pot 21 tilts, the liquid phase raw material tilts away from the electrode, and the powdered raw material at the far end approaches the smelting electrode 23, so that the raw material at the electrode is replaced and the smelting effect is improved. At the same time, since the slope filling 22 is arranged inside the smelting pot 21, when the smelting pot 21 tilts, the amount of raw materials in each direction entering the vicinity of the electrode is not uniform, which can help to use the high quality of the liquid phase to squeeze the low weight powder phase raw material close to the smelting electrode 23;

[0045] Since the positions of the slope filling 22 and the smelting pot 21 are fixed, in order to prevent the raw materials on the opposite side of the slope of the slope filling 22 from being piled up, the rotating driving wheel 52 is started to drive the swing mechanism 4 to rotate the supporting ring 3, and at the same time, the swing mechanism 4 is used to swing the smelting pot 21. After multiple adjustments, the raw materials that are tilted to the slope of the slope filling 22 can be kept in a horizontal position in the smelting pot 21, so as to prevent the smelting electrode 23 from being unable to contact the raw materials at some positions;

[0046] Since the smelting pot 21 and the connecting ring 43 are sleeved, when the swing mechanism 4 drives the smelting pot 21 to swing, the movable rolling ball 212 cooperates with the supporting base 211 to make the smelting pot 21 produce a self-rotation effect, and cooperates with the movement of the position change member 5 to make the raw materials fall into the smelting center of the smelting electrode 23 more easily, further improving the production efficiency, until the raw materials are completely melted into the silicon carbide liquid phase and then flow out to the mold for final shaping.

[0047] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] The above contents are merely examples and explanations of the structure of the present invention. The technicians in the technical field of the present invention may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A device for preparing non-fired reaction-sintered silicon carbide, characterized in that: The invention comprises a supporting bottom plate (1), a smelting mechanism (2) is arranged on the supporting bottom plate (1), the smelting mechanism (2) comprises a smelting pot (21), a movable rolling ball (212) is arranged at the bottom of the smelting pot (21), a supporting base (211) is arranged on the supporting bottom plate (1), the movable rolling ball (212) is rollingly connected to the supporting base (211), a plurality of smelting electrodes (23) are arranged in the smelting pot (21), and the smelting pot (21) is driven to swing so that the material in the smelting pot (21) is close to the smelting electrodes (23).

2. The device for preparing non-firing reaction-sintered silicon carbide according to claim 1, characterized in that: A slope filler (22) is provided in the smelting pot (21), and the slope filler (22) compensates for the sloped structure of the bottom of the smelting pot (21).

3. The device for preparing non-firing reaction-sintered silicon carbide according to claim 1, characterized in that: A supporting ring (3) is provided on the outer side of the smelting pot (21), a gap is left between the supporting ring (3) and the smelting pot (21), a plurality of supporting rods are provided between the supporting ring (3) and the supporting bottom plate (1), a swing mechanism (4) is provided on the supporting ring (3), and the swing mechanism (4) is used to drive the smelting pot (21) to lean against the supporting ring (3).

4. The device for preparing non-firing reaction-sintered silicon carbide according to claim 3, characterized in that: The swing mechanism (4) comprises a swing frame (41), the swing frame (41) presents a rectangular structure, the swing frame (41) is arranged on the outer side of the smelting pot (21), a symmetrically arranged movable block (42) is arranged in the middle of the swing frame (41), the swing frame (41) is provided with a movable groove (421) whose guiding direction is the same as the axis of the smelting pot (21), a connecting ring (43) is arranged in the middle of the swing frame (41), the connecting ring (43) is sleeved with the smelting pot (21), and the connecting ring (43) is provided with a symmetrically arranged movable block (42) The movable rod (44) passes through the movable groove (421), and the movable rod (44) passes through and is slidably connected to the movable groove (421). The swing mechanism (4) also includes two groups of symmetrically arranged position change members (5). The two groups of position change members (5) are arranged on the sides of the swing frame (41) where the movable block (42) is not arranged. The position change members (5) are used to rotate the relative position of the swing frame (41) and the supporting ring (3). The position change members (5) are provided with a driving member, and the driving member drives the center of the swing frame (41) to deviate from the center of the supporting ring (3).

5. The device for preparing non-firing reaction-sintered silicon carbide according to claim 4, characterized in that: The driving member comprises a connecting plate (51), the connecting plate (51) being arranged on the position-changing member (5), a rotating disc (46) being arranged on the connecting plate (51), the plane of the rotating disc (46) being parallel to the plane of the supporting base plate (1), the rotating axis of the rotating disc (46) passing through and being rotatably connected to the connecting plate (51), a driving motor (452) being arranged on the connecting plate (51) for driving the rotating disc (46) to rotate, an extension rod (45) being arranged in the middle of a side of the swing frame (41) not being arranged on the movable block (42), a through rod (451) being arranged on a plane of the rotating disc (46) deviating from the rotating axis, the through rod (451) passing through and being rotatably connected to the extension rod (45).

6. The device for preparing non-firing reaction-sintered silicon carbide according to claim 5, characterized in that: The position change member (5) comprises two groups of rotating driving wheels (52), the two groups of rotating driving wheels (52) clamp the inner and outer arc surfaces of the supporting ring (3), the rotating shaft of the rotating driving wheel (52) passes through and is rotatably connected to the connecting plate (51), an isolation ball (53) is provided between the connecting plate (51) and the supporting ring (3), the isolation ball (53) is rollingly connected to the connecting plate (51), and the isolation ball (53) abuts against the side surface of the supporting ring (3).

7. The device for preparing silicon carbide by reaction sintering without firing according to claim 3, characterized in that: When the swing mechanism (4) drives the smelting tank (21) to tilt, the end of the smelting electrode (23) is fixed in position relative to the supporting bottom plate (1).

8. The device for preparing non-firing reaction-sintered silicon carbide according to claim 7, characterized in that: The smelting electrode (23) stops working when the smelting tank (21) is tilted.

9. A method for preparing non-fired reaction-sintered silicon carbide, using a non-fired reaction-sintered silicon carbide preparation device as claimed in claim 2, characterized in that: The specific implementation is as follows: S1. Add the raw material powder into the smelting tank (21) and shake it evenly to keep it flat; S2. A smelting electrode (23) is introduced to heat the raw material powder; S3. After the heated part is molten, the heating is stopped and the smelting tank (21) is tilted; S4. After standing for a certain period of time, the smelting tank (21) is restored to its original position after the unmelted powder covers the molten area, and heating is continued; S5. Repeat steps S3-S4 until all are heated into a fluid state and then released to cool and set, completing the preparation.

10. The method for preparing non-firing reaction-sintered silicon carbide according to claim 9, characterized in that: In step S3, the positions of the multiple tilts are different.

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