Seamless thermal insulation layer for sintering furnace and preparation method thereof, high-temperature sintering furnace

Abstract

The present application relates to a seamless thermal insulation layer for a sintering furnace, a preparation method thereof, and a high-temperature sintering furnace. A carbon felt layer is wound on a winding auxiliary frame and wound several times. The winding auxiliary frame is used to limit the size of the carbon felt layer wound on the winding auxiliary frame, and any two adjacent carbon felt layers wound on the winding auxiliary frame are tightly fitted. The winding auxiliary frame is then pulled out from the semi-finished thermal insulation layer to obtain a seamless thermal insulation layer for a sintering furnace. The carbon felt layer is integrally wound by the winding auxiliary frame. The winding auxiliary frame can limit the shape and size of the shaped seamless thermal insulation layer for a sintering furnace, so that the actual high-temperature chamber formed is consistent with the theoretical high-temperature chamber size, can be adapted to the sintering furnace, and meet the needs of the sintering furnace. The seamless thermal insulation layer for a sintering furnace that is integrally wound does not have a splicing gap, thereby improving the thermal insulation performance of the seamless thermal insulation layer for a sintering furnace, preventing serious heat loss and waste in the high-temperature chamber, and solving related extension problems in the prior art.

Description

Technical Field

[0001] The present application relates to the technical field of sintering furnaces, and in particular to a seamless thermal insulation layer for a sintering furnace, a preparation method thereof, and a high-temperature sintering furnace. Background Art

[0002] A sintering furnace is a furnace that, at high temperature, causes the solid particles of the green body to bond with each other, the grains to grow, the voids (pores) and grain boundaries to gradually decrease, and through the transfer of matter, its total volume to shrink, the density to increase, and finally to become a dense polycrystalline sintered body with a certain microstructure.

[0003] Please refer to Figure 1 In a traditional sintering furnace, the insulation layer 10 is formed by splicing four insulation boards 20. The insulation layer 10 is arranged to form a high-temperature chamber (during the high-temperature sintering process in the sintering furnace, the temperature in the high-temperature chamber can reach about 2000°C, which contains a large amount of heat). In the insulation layer 10 of this structure, there is a splicing gap 30 at the joint of any two insulation boards 20. Some of the splicing gaps 30 are in the shape of a diagonal line, and some are in the shape of a ladder or step. However, this gap type is unavoidable. Even if the joint of the two insulation boards 20 is sealed or the two insulation boards 20 are spliced ​​more tightly, the splicing gap 30 cannot be completely eliminated. During the high-temperature sintering process in the sintering furnace, the heat in the high-temperature chamber will be dissipated through the splicing gap 30, which seriously affects the insulation effect of the insulation layer 10, resulting in poor insulation performance of the insulation layer 10, causing serious heat loss in the high-temperature chamber, and causing serious waste of heat.

[0004] The heat loss in the high-temperature chamber will make it difficult for the temperature in the high-temperature chamber to reach the sintering requirements (the temperature reaches about 2000°C), affecting the sintering of the product. In order to solve this problem, that is, in order to make the temperature in the high-temperature chamber reach about 2000°C, most manufacturers usually increase the power of the sintering furnace. Although this can make the temperature in the high-temperature chamber reach about 2000°C, the heat loss is more serious, resulting in a waste of resources and causing the sintering furnace to consume more power. At the same time, after the heat in the high-temperature chamber is dissipated through the splicing gap 30, the dissipated heat will be transferred to the metal furnace shell, causing the furnace shell temperature to be high, causing the furnace shell to be prone to burning, deformation, cracking and other problems, affecting the sealing of the furnace shell, shortening the service life of the furnace shell, requiring frequent maintenance, affecting normal production operations, and increasing production costs. Summary of the Invention

[0005] Based on this, it is necessary to address the problem in the prior art that the spliced ​​insulation layer has splicing gaps, through which heat will be lost, resulting in poor insulation performance of the insulation layer and serious heat loss. A seamless insulation layer for a sintering furnace and a preparation method thereof, as well as a high-temperature sintering furnace are provided. The carbon felt layer is integrally formed by winding through a winding auxiliary frame to obtain a seamless insulation layer for a sintering furnace. The winding auxiliary frame can limit the shape and size of the shaped seamless insulation layer for the sintering furnace so that the actual high-temperature chamber formed is consistent with the theoretical high-temperature chamber size, can be adapted to the sintering furnace, and meet the needs of the sintering furnace. The seamless insulation layer for a sintering furnace integrally formed by winding does not have splicing gaps, thereby preventing the heat in the high-temperature chamber from being lost through the splicing gaps, thereby improving the insulation performance of the seamless insulation layer for the sintering furnace, preventing serious heat loss and waste in the high-temperature chamber, and solving related extension problems in the prior art.

[0006] A method for preparing a seamless thermal insulation layer for a sintering furnace comprises the following steps:

[0007] S10. Lay the carbon felt layer flat along its length and place a winding auxiliary frame on the flattened carbon felt layer. The winding auxiliary frame has the same dimensions as the high-temperature chamber. The longitudinal ends of the carbon felt layer are detachably connected to the winding auxiliary frame, and the rotation axis of the winding auxiliary frame is perpendicular to the longitudinal direction of the carbon felt layer.

[0008] S20. Driving the auxiliary winding frame to flip and rotate along the length direction of the carbon felt layer to wind the carbon felt layer on the auxiliary winding frame, the auxiliary winding frame is used to limit the size of the carbon felt layer wound on the auxiliary winding frame so that the size of the carbon felt layer is compatible with the size of the high-temperature chamber, and the auxiliary winding frame is rotated several times to wind the carbon felt layer several times, so that any two adjacent carbon felt layers wound on the auxiliary winding frame are tightly attached to each other, thereby obtaining a cylindrical semi-finished thermal insulation layer;

[0009] S30. Remove the connection between the end of the carbon felt layer and the winding auxiliary frame, and pull the winding auxiliary frame out of the semi-finished insulation layer to obtain a seamless insulation layer for a sintering furnace. The seamless insulation layer for a sintering furnace can be used to surround the high-temperature chamber.

[0010] Preferably, in the above-mentioned method for preparing a seamless thermal insulation layer for a sintering furnace, after S10 and before S20, the following steps are further included:

[0011] S40. Adhere a plurality of double-sided adhesive strips to the flattened carbon felt layer, wherein the plurality of double-sided adhesive strips are arranged at intervals in the longitudinal direction of the carbon felt layer.

[0012] Preferably, in the above-mentioned method for preparing a seamless thermal insulation layer for a sintering furnace, in S10, the winding auxiliary frame is in the shape of a rectangular parallelepiped, and the ends of the carbon felt layer in the length direction are sewn and connected to the long edges of the winding auxiliary frame using sutures; in S30, the sutures are removed and the winding auxiliary frame is pulled out from the semi-finished thermal insulation layer.

[0013] Preferably, in the above method for preparing a seamless thermal insulation layer for a sintering furnace, in S20, the winding auxiliary frame rotates at least ten times to allow the carbon felt layer to be wound at least ten times.

[0014] Preferably, in the above-mentioned method for preparing a seamless thermal insulation layer for a sintering furnace, in S20, after the winding auxiliary frame flips and rotates for one circle, a graphite paper layer is laid flat on the flat carbon felt layer, and the length of the graphite paper layer is at least twice the flipping and rotating circumference of the winding auxiliary frame. The winding auxiliary frame continues to flip and rotate for at least two weeks to wind the carbon felt layer and the graphite paper layer on the winding auxiliary frame, so that the graphite paper layer is sandwiched between the two adjacent carbon felt layers.

[0015] Preferably, in the above-mentioned method for preparing a seamless thermal insulation layer for a sintering furnace, the size of the winding auxiliary frame is adjustable to adapt to the high-temperature chambers of various sizes.

[0016] Preferably, in the above-mentioned method for preparing a seamless thermal insulation layer for a sintering furnace, the winding auxiliary frame is in the shape of a rectangular parallelepiped, and the winding auxiliary frame includes at least three telescopic frames and multiple telescopic connecting rods. The telescopic frame is composed of four telescopic rods connected end to end, and the size can be adjusted telescopically. At least three of the telescopic frames are arranged at intervals, and four telescopic connecting rods are connected between two adjacent telescopic frames and are connected to the four corners of the telescopic frames.

[0017] A seamless thermal insulation layer for a sintering furnace is prepared by the method for preparing a seamless thermal insulation layer for a sintering furnace as described above.

[0018] A high-temperature sintering furnace comprises the seamless thermal insulation layer for the sintering furnace as described above.

[0019] The technical solution adopted in this application can achieve the following beneficial effects:

[0020] In a preparation method of a seamless thermal insulation layer for a sintering furnace disclosed in an embodiment of the present application, a carbon felt layer is wound on a winding auxiliary frame, and the winding auxiliary frame is pulled out after shaping, that is, the carbon felt layer is wound into an integral shape by the winding auxiliary frame to obtain a seamless thermal insulation layer for a sintering furnace. The winding auxiliary frame can limit the shape and size of the shaped seamless thermal insulation layer for a sintering furnace, so that the size of the seamless thermal insulation layer for a sintering furnace is adapted to the size of a theoretical high-temperature chamber, so that the actual high-temperature chamber formed by the seamless thermal insulation layer for a sintering furnace is consistent with the size of the theoretical high-temperature chamber, so that the shape and size of the seamless thermal insulation layer for a sintering furnace can be adapted to the sintering furnace, meet the requirements of the sintering furnace, and ensure the practicality of the seamless thermal insulation layer for a sintering furnace. The seamless thermal insulation layer for the sintering furnace, which is formed by winding as a whole, does not have splicing gaps, thereby preventing the existing technology from requiring insulation boards to be spliced ​​to form the insulation layer, resulting in splicing gaps in the insulation layer, thereby preventing heat in the high-temperature chamber from being lost through the splicing gaps, and avoiding affecting the thermal insulation effect of the seamless thermal insulation layer for the sintering furnace. The final seamless thermal insulation layer for the sintering furnace has multiple layers of carbon felt, which makes it thicker, making it more difficult for heat in the high-temperature chamber to be lost through the seamless thermal insulation layer for the sintering furnace, thereby improving the thermal insulation performance of the seamless thermal insulation layer for the sintering furnace, and preventing serious heat loss and waste in the high-temperature chamber. Based on this, when the heat in the high-temperature chamber is difficult to be lost through the seamless thermal insulation layer for the sintering furnace, the temperature in the high-temperature chamber can reach about 2000°C without increasing the power, and it can avoid excessive heat loss and causing the furnace shell temperature to be high, thereby solving the related extension problems in the existing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of splicing the insulation layer in the prior art, in which: the insulation layer 10, the insulation board 20, and the splicing gap 30;

[0022] Figures 2 to 4 Schematic diagram of the process of the preparation method disclosed in the examples of this application;

[0023] Figure 5 Schematic diagram of a winding auxiliary frame disclosed in an embodiment of the present application;

[0024] Figure 6 Schematic diagram of a seamless thermal insulation layer for a sintering furnace disclosed in an embodiment of the present application;

[0025] Figure 7 for Figure 6 A partial enlarged schematic diagram;

[0026] Figure 8This is a schematic diagram of the high-temperature sintering furnace disclosed in the embodiment of the present application, wherein the dotted line represents the temperature measuring line, and the two temperature measuring points connected by the temperature measuring line are temperature measuring points 1 and 2. Temperature measuring point 1 detects the temperature outside the seamless insulation layer for the sintering furnace, that is, the temperature outside the high-temperature chamber, and temperature measuring point 2 detects the temperature inside the seamless insulation layer for the sintering furnace, that is, the temperature inside the high-temperature chamber.

[0027] Description of the drawings: carbon felt layer 100, double-sided adhesive strip 110, winding auxiliary frame 200, telescopic frame 210, telescopic connecting rod 220, seamless thermal insulation layer for sintering furnace 300, graphite paper layer 400. DETAILED DESCRIPTION

[0028] To facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant examples. The preferred embodiments of the present application are provided in the examples. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of the present application.

[0029] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be an element centered thereon. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon. The terms "vertical," "horizontal," "left," "right," "top," "bottom," "bottom end," "top end," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are intended only to describe specific embodiments and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] Please refer to Figures 2 to 7 The present invention discloses a method for preparing a seamless thermal insulation layer for a sintering furnace, comprising the following steps:

[0032] S10. The carbon felt layer 100 is laid flat along its length direction, and a winding auxiliary frame 200 is set on the flattened carbon felt layer 100. Please refer to Figure 2The end portion of the carbon felt layer 100 in the length direction is detachably connected to the winding auxiliary frame 200 (for example, the end portion of the carbon felt layer 100 in the length direction is temporarily sewn and connected to a frame of the winding auxiliary frame 200 with a nylon rope and then removed separately), so that the end portion of the carbon felt layer 100 in the length direction is driven to rotate accordingly during the flipping and rotation of the winding auxiliary frame 200, thereby winding the carbon felt layer 100 on the winding auxiliary frame 200, and the rotation axis of the winding auxiliary frame 200 is perpendicular to the length direction of the carbon felt layer 100, so that the carbon felt layer 100 is gradually wound on the winding auxiliary frame 200 from the length direction of the carbon felt layer 100 during the flipping and rotation of the winding auxiliary frame 200.

[0033] At the same time, the winding auxiliary frame 200 has the same size as the high-temperature chamber. Since the seamless insulation layer 300 for the sintering furnace has not yet been prepared in this step, the actual high-temperature chamber has not yet been formed. Therefore, the high-temperature chamber here refers to the theoretical high-temperature chamber adapted to the sintering furnace. It is a high-temperature chamber pre-assumed according to the required dimensions. According to the dimensions of the theoretical high-temperature chamber, a seamless insulation layer 300 for the sintering furnace adapted to the dimensions is prepared to form an actual high-temperature chamber with the same dimensions as the theoretical high-temperature chamber. The dimensions of the high-temperature chamber here refer to the dimensions of the high-temperature chamber required by the sintering furnace, that is, the dimensions of the theoretical high-temperature chamber pre-assumed according to the required dimensions, specifically the length, width and height of the theoretical high-temperature chamber. The winding auxiliary frame 200 is used to limit the size of the carbon felt layer 100 wound on the winding auxiliary frame 200, so that the size of this part of the carbon felt layer 100 (the carbon felt layer 100 wound on the winding auxiliary frame 200) is adapted to the size of the theoretical high-temperature chamber, thereby making the size of the seamless thermal insulation layer 300 for the sintering furnace prepared by the preparation method disclosed in the present application adapted to the size of the theoretical high-temperature chamber. After the seamless thermal insulation layer 300 for the sintering furnace prepared by the preparation method disclosed in the present application is installed in the sintering furnace, the actual high-temperature chamber formed is consistent with the theoretical high-temperature chamber size. That is to say, in order to make the size of the actual high-temperature chamber consistent with the size of the theoretical (pre-assumed) high-temperature chamber, the size of the seamless thermal insulation layer 300 for the sintering furnace is limited by the winding auxiliary frame 200 having the same size as the theoretical high-temperature chamber, so that the size of the seamless thermal insulation layer 300 for the sintering furnace is adapted to the size of the theoretical high-temperature chamber, so that the actual high-temperature chamber formed by the seamless thermal insulation layer 300 for the sintering furnace is consistent with the size of the theoretical high-temperature chamber, that is, the seamless thermal insulation layer 300 for the sintering furnace is prepared according to the size of the theoretical high-temperature chamber to form an actual high-temperature chamber with the same size as the theoretical high-temperature chamber.

[0034] S20. Drive the winding auxiliary frame 200 to turn along the length direction of the carbon felt layer 100. Please refer to Figure 3 and Figure 4Since the ends of the carbon felt layer 100 in the length direction are connected to the winding auxiliary frame 200, and the rotation axis of the winding auxiliary frame 200 is perpendicular to the length direction of the carbon felt layer 100, during the flipping and rotation process of the winding auxiliary frame 200, the ends of the carbon felt layer 100 in the length direction rotate accordingly with the winding auxiliary frame 200, thereby gradually winding the carbon felt layer 100 on the winding auxiliary frame 200 in the length direction of the carbon felt layer 100, so that the carbon felt layer 100 is wound on the winding auxiliary frame 200. The function of the winding auxiliary frame 200 mentioned above is reflected in the winding process. The winding auxiliary frame 200 is used to limit the size of the carbon felt layer 100 wound on the winding auxiliary frame 200, so that the size of this part of the carbon felt layer 100 (the carbon felt layer 100 wound on the winding auxiliary frame 200) is adapted to the size of the high-temperature chamber (theoretical high-temperature chamber), ensuring that the size of the final seamless thermal insulation layer 300 for the sintering furnace is adapted to the size of the theoretical high-temperature chamber, so that the actual high-temperature chamber formed by the seamless thermal insulation layer 300 for the sintering furnace is consistent with the theoretical high-temperature chamber size.

[0035] The auxiliary winding frame 200 rotates several times, causing the carbon felt layer 100 to be wound several times (indicating that the carbon felt layer 100 is wound multiple times or layers), so that the final seamless thermal insulation layer 300 for the sintering furnace has multiple layers of carbon felt layers 100, making it thicker and ensuring that the seamless thermal insulation layer 300 for the sintering furnace has higher thermal insulation performance. During the winding process, the carbon felt layer 100 needs to be tightened (stretched) to prevent it from being loose, so that any two adjacent carbon felt layers 100 wound on the auxiliary winding frame 200 fit tightly together to avoid the presence of gaps that affect the thermal insulation performance. Such gaps will also affect the vacuum level during the subsequent use of the sintering furnace (during the vacuuming process in the furnace, air impurities in the gaps between the carbon felt layers 100 are difficult to be extracted due to the obstruction of the carbon felt layers 100). Through this step, a cylindrical semi-finished thermal insulation layer can be obtained.

[0036] S30. Remove the connection between the end of the carbon felt layer 100 and the winding auxiliary frame 200. In the above steps, in order to facilitate the winding of the carbon felt layer 100 on the winding auxiliary frame 200, the end of the carbon felt layer 100 in the length direction is connected to the winding auxiliary frame 200. After the winding is completed, that is, in this step, the winding auxiliary frame 200 needs to be pulled out of the semi-finished insulation layer. Therefore, it is necessary to remove the connection between the end of the carbon felt layer 100 and the winding auxiliary frame 200 so that the winding auxiliary frame 200 can be pulled out of the semi-finished insulation layer, avoiding the inability to pull the winding auxiliary frame 200 out of the semi-finished insulation layer due to the connection between the end of the carbon felt layer 100 and the winding auxiliary frame 200. After the winding auxiliary frame 200 is pulled out of the semi-finished insulation layer, the seamless insulation layer 300 for the sintering furnace is obtained. Please refer to Figure 6Since the seamless thermal insulation layer 300 for the sintering furnace is formed by winding the carbon felt layer 100 into one body, it avoids the need to splice the thermal insulation boards to form the thermal insulation layer (the construction method of the thermal insulation layer in the prior art), so the seamless thermal insulation layer 300 for the sintering furnace does not have a splicing gap.

[0037] The seamless thermal insulation layer 300 for the sintering furnace can be enclosed to form a high-temperature chamber. The high-temperature chamber here refers to the actual high-temperature chamber mentioned above. The size of the seamless thermal insulation layer 300 for the sintering furnace is limited by the winding auxiliary frame 200 with the same size as the theoretical high-temperature chamber, so that the size of the seamless thermal insulation layer 300 for the sintering furnace is adapted to the size of the theoretical high-temperature chamber, so that the actual high-temperature chamber formed by the seamless thermal insulation layer 300 for the sintering furnace is consistent with the size of the theoretical high-temperature chamber, that is, the seamless thermal insulation layer 300 for the sintering furnace with a size adapted to the size of the theoretical high-temperature chamber is prepared according to the size of the theoretical high-temperature chamber to form an actual high-temperature chamber with the same size as the theoretical high-temperature chamber to meet the requirements of the sintering furnace.

[0038] In a preparation method of a seamless thermal insulation layer for a sintering furnace disclosed in an embodiment of the present application, a carbon felt layer 100 is wound on a winding auxiliary frame 200, and the winding auxiliary frame 200 is pulled out after shaping, that is, the carbon felt layer 100 is wound into an integral shape by the winding auxiliary frame 200 to obtain a seamless thermal insulation layer 300 for a sintering furnace. The winding auxiliary frame 200 can limit the shape and size of the shaped seamless thermal insulation layer 300 for a sintering furnace, so that the size of the seamless thermal insulation layer 300 for a sintering furnace is adapted to the size of a theoretical high-temperature chamber, so that the actual high-temperature chamber formed by the seamless thermal insulation layer 300 for a sintering furnace is consistent with the size of the theoretical high-temperature chamber, so that the shape and size of the seamless thermal insulation layer 300 for a sintering furnace can be adapted to the sintering furnace, meet the requirements of the sintering furnace, and ensure the practicality of the seamless thermal insulation layer 300 for a sintering furnace. The seamless thermal insulation layer 300 for the sintering furnace, which is formed by winding as a whole, does not have any splicing gaps, thereby preventing the existing technology from requiring insulation boards to be spliced ​​to form the insulation layer, thereby preventing the heat in the high-temperature chamber from being lost through the splicing gaps, and avoiding affecting the insulation effect of the seamless thermal insulation layer 300 for the sintering furnace. The final seamless thermal insulation layer 300 for the sintering furnace has multiple layers of carbon felt layers 100, which makes it thicker, making it more difficult for the heat in the high-temperature chamber to be lost through the seamless thermal insulation layer 300 for the sintering furnace, thereby improving the thermal insulation performance of the seamless thermal insulation layer 300 for the sintering furnace, and preventing serious heat loss and waste in the high-temperature chamber. Based on this, when the heat in the high-temperature chamber is difficult to be lost through the seamless thermal insulation layer 300 for the sintering furnace, the temperature in the high-temperature chamber can reach about 2000°C without increasing the power, and it can avoid excessive heat loss and causing the furnace shell temperature to be high, thereby solving the related extension problems in the existing technology.

[0039] In order to facilitate the shaping of the carbon felt layer 100 wound for multiple turns and to ensure that any two adjacent carbon felt layers 100 wound on the auxiliary winding frame 200 are tightly fitted together, the following steps may be optionally included after S10 and before S20:

[0040] S40. Adhere a plurality of double-sided adhesive strips 110 to the flattened carbon felt layer 100, and the plurality of double-sided adhesive strips 110 are arranged at intervals in the longitudinal direction of the carbon felt layer 100. As the carbon felt layer 100 is gradually wound on the winding auxiliary frame 200, the plurality of double-sided adhesive strips 110 gradually adhere to the previous carbon felt layer 100, so that the two adjacent carbon felt layers 100 are adhered to each other through the double-sided adhesive strips 110, so that the carbon felt layers 100 of multiple cycles are adhered as a whole and are shaped under the restriction of the winding auxiliary frame 200, so that the carbon felt layers 100 of multiple cycles are easily shaped, and any two adjacent carbon felt layers 100 wound on the winding auxiliary frame 200 can be tightly fitted together, avoiding delamination or gaps between the two adjacent carbon felt layers 100, and avoiding the gaps that affect the thermal insulation performance and the vacuum degree of the sintering furnace, which is beneficial to improving the structural compactness of the seamless thermal insulation layer 300 for the sintering furnace.

[0041] At the same time, during the sintering process in the sintering furnace, the double-sided adhesive strip 110 evaporates at high temperature and is discharged from the sintering furnace to avoid affecting the sintering atmosphere conditions. Since the seamless thermal insulation layer 300 for the sintering furnace has been fixedly installed in the sintering furnace at this time, the high-temperature volatilization of the double-sided adhesive strip 110 will not affect the structural compactness of the seamless thermal insulation layer 300 for the sintering furnace, thereby ensuring the structural stability and reliability of the seamless thermal insulation layer 300 for the sintering furnace.

[0042] As described above, in order to facilitate the winding of the carbon felt layer 100 on the auxiliary winding frame 200, the ends of the carbon felt layer 100 in the longitudinal direction are detachably connected to the auxiliary winding frame 200. After the winding is completed, the connection between the ends of the carbon felt layer 100 and the auxiliary winding frame 200 needs to be removed. To facilitate the connection and removal of the ends of the carbon felt layer 100 and the auxiliary winding frame 200, optionally, in S10, the auxiliary winding frame 200 is shaped as a rectangular parallelepiped, and the ends of the carbon felt layer 100 in the longitudinal direction are sutured to the long edges of the auxiliary winding frame 200 using sutures; in S30, the sutures are removed and the auxiliary winding frame 200 is pulled out of the semi-finished insulation layer. The suture connection method can facilitate the connection and removal of the ends of the carbon felt layer 100 and the auxiliary winding frame 200, is convenient for the operator to operate, and will not leave any residue, thereby avoiding affecting the sintering atmosphere conditions during the sintering process.

[0043] In the present application, the auxiliary winding frame 200 rotates several times, winding the carbon felt layer 100 several times, so that the resulting seamless thermal insulation layer 300 for the sintering furnace has multiple layers of carbon felt layers 100, making it thicker and ensuring that the seamless thermal insulation layer 300 for the sintering furnace has high thermal insulation performance. Furthermore, in S20, the auxiliary winding frame 200 rotates at least ten times, winding the carbon felt layer 100 at least ten times, so that the resulting seamless thermal insulation layer 300 for the sintering furnace has at least ten layers of carbon felt layers 100, further ensuring the thermal insulation performance of the seamless thermal insulation layer 300 for the sintering furnace.

[0044] Please refer again Figure 4 Preferably, in S20, after the winding auxiliary frame 200 turns over and rotates for one circle, the graphite paper layer 400 is laid flat on the flat carbon felt layer 100, and the length of the graphite paper layer 400 is at least twice the turning circumference of the winding auxiliary frame 200. The winding auxiliary frame 200 continues to turn over and rotate for at least two circles to wind the carbon felt layer 100 and the graphite paper layer 400 on the winding auxiliary frame 200, so that the graphite paper layer 400 is sandwiched between two adjacent carbon felt layers 100. Please refer to Figure 7 Through this step, a graphite paper layer 400 is provided between the first carbon felt layer 100 and the second carbon felt layer 100, and between the second carbon felt layer 100 and the third carbon felt layer 100. The graphite paper layer 400 is resistant to high temperature, has a smooth surface, and has good reflectivity. The graphite paper layer 400 achieves the purpose of heat insulation by reflecting infrared heat, and has a heat insulation effect. The graphite paper layer 400 is located in the inner layer of the seamless thermal insulation layer 300 for the sintering furnace, which can reduce heat transfer from the source for heat insulation, and can further improve the thermal insulation performance of the seamless thermal insulation layer 300 for the sintering furnace.

[0045] Please refer again Figure 7 The seamless thermal insulation layer 300 for a sintering furnace disclosed in the present application can be provided with a graphite paper layer 400 at the corners, while in the prior art, two insulation boards need to be spliced ​​and the graphite paper layer 400 cannot be provided. Therefore, the graphite paper layer 400 can further improve the thermal insulation performance of the corners of the seamless thermal insulation layer 300 for a sintering furnace, and further prevent the heat in the high-temperature chamber from being lost through the corners of the seamless thermal insulation layer 300 for a sintering furnace.

[0046] Please refer again Figure 4The winding auxiliary rack 200 can limit the shape and size of the seamless thermal insulation layer 300 for the shaped sintering furnace, so that the shape and size of the seamless thermal insulation layer 300 for the sintering furnace can be adapted to the sintering furnace and meet the needs of the sintering furnace. However, the high-temperature chambers of different sintering furnaces are of different sizes. In order to make the winding auxiliary rack 200 match the high-temperature chambers of different sizes, the size of the winding auxiliary rack 200 can be optionally adjusted to adapt to a variety of high-temperature chambers of different sizes, thereby increasing the scope of application of the winding auxiliary rack 200 and improving the versatility of the winding auxiliary rack 200. The size of the winding auxiliary rack 200 can be adjusted according to the requirements of different sintering furnace types so that the winding auxiliary rack 200 can adapt to high-temperature chambers of different sizes, thereby avoiding the need for multiple winding auxiliary racks 200 of different sizes for high-temperature chambers of different sizes, which results in high production costs.

[0047] For details, please refer again to Figure 5 The winding auxiliary frame 200 is in the shape of a rectangular parallelepiped and includes at least three telescopic frames 210 and multiple telescopic connecting rods 220. The telescopic frame 210 is composed of four telescopic rods connected end to end, and the size can be adjusted telescopically. At least three telescopic frames 210 are arranged at intervals, and four telescopic connecting rods 220 are connected between two adjacent telescopic frames 210 and connected to the four corners of the telescopic frame 210. The width and height of the winding auxiliary frame 200 can be adjusted through the telescopic frame 210, and the length of the winding auxiliary frame 200 can be adjusted through the telescopic connecting rod 220. Through this structure, the length, width and height of the winding auxiliary frame 200 can be adjusted, and the full size adjustment of the winding auxiliary frame 200 can be achieved, thereby improving the versatility of the winding auxiliary frame 200. The size of the winding auxiliary frame 200 can be adjusted according to the requirements of different sintering furnace types, so that the winding auxiliary frame 200 can be adapted to high-temperature chambers of different sizes. Moreover, through this structure, the length, width and height of the winding auxiliary frame 200 can be adjusted, the adjustment method is simple and convenient, and the structure is stable and reliable.

[0048] An embodiment of the present application also discloses a seamless thermal insulation layer for a sintering furnace, which is prepared by a method for preparing a seamless thermal insulation layer for a sintering furnace as described in any of the embodiments above. The prepared seamless thermal insulation layer 300 for a sintering furnace does not have splicing gaps, thereby improving the thermal insulation performance of the seamless thermal insulation layer 300 for a sintering furnace, preventing serious heat loss and waste in a high-temperature chamber, and the shape and size of the seamless thermal insulation layer 300 for a sintering furnace can be adapted to the sintering furnace, meeting the requirements of the sintering furnace, and ensuring the practicality of the seamless thermal insulation layer 300 for a sintering furnace.

[0049] An embodiment of the present application also discloses a high-temperature sintering furnace, including a seamless thermal insulation layer for a sintering furnace as described in any of the embodiments above. After the high-temperature sintering furnace uses the seamless thermal insulation layer 300 for a sintering furnace with high thermal insulation performance, since the seamless thermal insulation layer 300 for a sintering furnace formed by winding as a whole does not have a splicing gap, the heat in the high-temperature chamber is prevented from being lost through the splicing gap of the thermal insulation layer in the prior art. When the heat in the high-temperature chamber is difficult to be lost through the seamless thermal insulation layer 300 for a sintering furnace, the temperature in the high-temperature chamber can reach about 2000°C without increasing the power of the sintering furnace, and it can avoid excessive heat loss that causes the furnace shell temperature to be high, thereby solving related extension problems in the prior art.

[0050] Example 1:

[0051] The high temperature sintering furnace using the above seamless insulation layer 300 for sintering furnace and the sintering furnace using the insulation layer in the prior art are powered on and operated respectively. Figure 8 , set temperature measuring points inside and outside the seamless insulation layer 300 of the sintering furnace, such as Figure 8 The two temperature measuring points 1 and 2 are used to measure the temperature when the high-temperature sintering furnace is powered on and running.

[0052] At the same time, a sintering furnace using the conventional insulation layer was powered on and temperature measurements were taken both inside and outside the insulation layer, as in the conventional method. When the temperature inside the insulation chamber exceeded 2000°C, the temperature was measured and the power supplied was recorded. The results are shown in the table below.

[0053]

[0054] It can be seen from the above table that when the temperature in the insulation chamber exceeds 2000°C, the temperature in the insulation chamber (2 temperature measuring points) of the sintering furnace using the insulation layer in the prior art (hereinafter referred to as the prior art) is 2006°C, and the temperature in the insulation chamber (2 temperature measuring points) of the high-temperature sintering furnace in this application (hereinafter referred to as the present application) is 2043°C. The temperature difference between the two is small and is regarded as the same reference temperature. On this basis, the temperature outside the insulation chamber (1 temperature measuring point) in the prior art is 1468°C, and the temperature difference between the inside and outside is 538°C, indicating that the temperature inside and outside the insulation chamber of the prior art is 2006°C. The temperature difference is small. This is because more heat in the insulation chamber is lost to the outside of the insulation chamber, making the temperature outside the insulation chamber also relatively high; in this application, the temperature outside the insulation chamber (1 temperature measuring point) is 831°C, and the temperature difference between the inside and outside is 1212°C, indicating that the temperature difference between the inside and outside of the insulation chamber of this application is large. This is because less heat in the insulation chamber is lost to the outside of the insulation chamber, making the temperature outside the insulation chamber lower. This shows that compared with the insulation layer in the prior art, the seamless insulation layer for the sintering furnace of this application has higher insulation performance, and the insulation performance can be improved by 125.3%.

[0055] At the same time, in order to make the temperature in the insulation chamber reach 2000℃, the existing technology requires a power transmission power of 192KW, while the present application only requires a power transmission power of 153KW, which is a reduction of 39KW, a reduction of up to 20.3%. This is because the insulation effect of the insulation layer of the existing technology is poor, and most of the heat in the high-temperature chamber is lost through the splicing gaps, resulting in a decrease in the heat in the high-temperature chamber and a difficulty in raising the temperature. The temperature in the high-temperature chamber can only reach 2000℃ by further increasing the power transmission power. In the present application, the heat in the high-temperature chamber is difficult to dissipate through the seamless insulation layer 300 for the sintering furnace, and the temperature in the high-temperature chamber can be increased quickly, and can reach 2000℃ without increasing the power. This aspect also reflects that the seamless insulation layer for the sintering furnace in the present application has a high insulation performance.

[0056] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A method for preparing a seamless thermal insulation layer for a sintering furnace, characterized in that: The following steps are involved: S10. Lay the carbon felt layer (100) flat along its length direction, and set a winding auxiliary frame (200) on the flattened carbon felt layer (100), wherein the winding auxiliary frame (200) has the same size as the high-temperature chamber, and the end of the carbon felt layer (100) in the length direction is detachably connected to the winding auxiliary frame (200), and the rotation axis of the winding auxiliary frame (200) is perpendicular to the length direction of the carbon felt layer (100); S20. Drive the winding auxiliary frame (200) to flip and rotate along the length direction of the carbon felt layer (100) to wind the carbon felt layer (100) on the winding auxiliary frame (200), and the winding auxiliary frame (200) is used to limit the winding on the winding auxiliary frame The size of the carbon felt layer (100) on the (200) is adapted to the size of the high-temperature chamber, and the winding auxiliary frame (200) is rotated several times to allow the carbon felt layer (100) to be wound several times, and any two adjacent carbon felt layers (100) wound on the winding auxiliary frame (200) are tightly fitted to obtain a cylindrical semi-finished insulation layer; S30. The connection between the end of the carbon felt layer (100) and the winding auxiliary frame (200) is removed, and the winding auxiliary frame (200) is pulled out from the semi-finished insulation layer to obtain a seamless insulation layer (300) for a sintering furnace, and the seamless insulation layer (300) for a sintering furnace can be surrounded to form the high-temperature chamber; The size of the winding auxiliary frame (200) is adjustable to fit the high-temperature chambers of various sizes; The winding auxiliary frame (200) is in the shape of a rectangular parallelepiped and comprises at least three telescopic frames (210) and a plurality of telescopic connecting rods (220). The telescopic frames (210) are composed of four telescopic rods connected end to end and are telescopically adjustable in size. At least three telescopic frames (210) are arranged at intervals, and four telescopic connecting rods (220) are connected between two adjacent telescopic frames (210) and are connected to the four corners of the telescopic frames (210).

2. The method for preparing a seamless thermal insulation layer for a sintering furnace according to claim 1, characterized in that: After S10 and before S20, the following steps are also included: S40. A plurality of double-sided adhesive strips (110) are bonded to the flattened carbon felt layer (100), wherein the plurality of double-sided adhesive strips (110) are arranged at intervals in the length direction of the carbon felt layer (100).

3. The method for preparing a seamless thermal insulation layer for a sintering furnace according to claim 1, characterized in that: In the S10, the winding auxiliary frame (200) is in the shape of a cuboid, and the ends of the carbon felt layer (100) in the length direction are sewn and connected to the long edges of the winding auxiliary frame (200) using sutures; in the S30, the sutures are removed, and the winding auxiliary frame (200) is pulled out of the semi-finished thermal insulation layer.

4. The method for preparing a seamless thermal insulation layer for a sintering furnace according to claim 1, characterized in that: In the step S20, the winding auxiliary frame (200) rotates at least ten times, so that the carbon felt layer (100) is wound at least ten times.

5. The method for preparing a seamless thermal insulation layer for a sintering furnace according to claim 1, characterized in that: In the S20, after the winding auxiliary frame (200) is flipped and rotated for one circle, a graphite paper layer (400) is laid flat on the flat carbon felt layer (100), and the length of the graphite paper layer (400) is at least twice the flipping and rotating circumference of the winding auxiliary frame (200). The winding auxiliary frame (200) continues to flip and rotate for at least two weeks to wind the carbon felt layer (100) and the graphite paper layer (400) on the winding auxiliary frame (200), so that the graphite paper layer (400) is sandwiched between the carbon felt layers (100) on two adjacent parts.

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