Top heat-insulating device of anode baking furnace with heat recovery function

Abstract

The utility model discloses an anode baking furnace top heat preservation device with heat recovery function, including baking furnace body and the heat preservation device body of being located baking furnace body top, still include heat recovery device, heat recovery device installs heat preservation device body's top, heat recovery device includes heat collection board subassembly, heat collection board subassembly adopts high -efficient heat -conducting metal material to make, its shape is arc structure to adapt the top piece of heat preservation device top top, is equipped with a plurality of microchannels in the inside, lower surface coats high absorption rate black coating, and microchannel fills heat conducting medium. The utility model discloses through heat recovery device, realizes the efficient collection and reuse of baking furnace top heat loss, effectively promotes energy utilization, and reduces production cost.

Description

Technical Field

[0001] This utility model relates to the field of roasting furnaces. More specifically, this utility model relates to a top insulation device for an anode roasting furnace with heat recovery function. Background Technology

[0002] In the anode roasting process, the thermal efficiency and energy utilization of the anode roasting furnace play a crucial role in production costs, efficiency, and environmental impact. The top insulation device of the anode roasting furnace with heat recovery function is a key component for reducing heat loss and improving the furnace's thermal efficiency; its performance directly affects the energy consumption and economic benefits of the entire roasting process.

[0003] In the prior art, publication number CN209147732U discloses a top insulation device for an anode roasting furnace with heat recovery function and an ejector mechanism. This device can play a certain role in heat preservation, mainly by adjusting the thermal conductivity of the insulation device through mechanical adjustment of an electric motor and a pull rod, thereby controlling the internal temperature of the roasting furnace. However, this design has a significant drawback: the device does not effectively recover and utilize the heat lost from the top of the roasting furnace, causing a large amount of heat energy to be wasted into the surrounding environment, further reducing energy efficiency. With the increasing global requirements for energy conservation and emission reduction, and the continuous rise in energy costs, the development of a top insulation device for an anode roasting furnace with heat recovery function that can effectively preserve heat and save energy is particularly urgent. Summary of the Invention

[0004] One object of this invention is to solve at least the problems described above and to provide at least the advantages that will be explained later.

[0005] Another objective of this invention is to provide a top insulation device for an anode roasting furnace with heat recovery function, which can recover and reuse the heat lost from the top of the roasting furnace, significantly improve energy utilization efficiency, reduce energy waste, thereby reducing production costs and achieving good economic and environmental benefits.

[0006] To achieve these objectives and other advantages according to the present invention, a top insulation device for an anode roasting furnace with heat recovery function is provided, comprising a roasting furnace body and an insulation device body disposed above the roasting furnace body, and a heat recovery device. The heat recovery device is installed on the top of the insulation device body and includes a heat collection plate assembly. The heat collection plate assembly is made of a high-efficiency thermally conductive metal material and has an arc-shaped structure to fit the top plate above the top of the insulation device. It has multiple microchannels inside, which are filled with a thermally conductive medium, and the lower surface is coated with a high-absorption black coating.

[0007] Preferably, the heat recovery device further includes a heat-conducting pipe system, which is composed of high-temperature resistant and thermally conductive metal pipes. One end of the pipes is connected to the microchannel outlet of the heat collection plate assembly, and the other end is connected to the heat exchanger. The pipes are wrapped with insulation material.

[0008] Preferably, the heat exchanger adopts a plate structure with multiple corrugated heat exchange plates inside to form hot and cold fluid channels. The hot fluid channels are connected to heat-conducting pipes, and the cold fluid channels are connected to external low-temperature fluids.

[0009] Preferably, the heat recovery device is further provided with a heat storage module, which uses phase change material as the heat storage medium. The phase change material is encapsulated in multiple sealed metal containers, and the metal containers are connected to the hot fluid outlet of the heat exchanger.

[0010] Preferably, the solar collector assembly adopts a three-layer composite structure, specifically including: The upper layer is a heat insulation buffer layer, which is composed of aerogel and glass fiber composite material and has a thickness of 3-5 mm; The middle layer is a high-efficiency thermally conductive metal substrate. Micro heat pipes with a diameter of 0.5-1 mm are uniformly distributed inside the high-efficiency thermally conductive metal substrate to form microchannels. The micro heat pipes vertically penetrate the high-efficiency thermally conductive metal substrate. An integrated thermally conductive connecting block is set at the top of the high-efficiency thermally conductive metal substrate corresponding to the top position of the micro heat pipes. The thermally conductive connecting block is made of the same alloy material as the micro heat pipes. The metal pipes of the thermally conductive pipe system are connected to the thermally conductive connecting block by welding, and the weld joint is subjected to multi-layer sealing treatment. The lower layer is a high-absorption black coating with a thickness of 50-100 nm, which is used to significantly improve the absorption efficiency of infrared rays.

[0011] Preferably, a layer of thermally conductive silicone sheet is laid on the contact surface between the heat collection plate assembly and the top plate, and the thermally conductive silicone sheet has a thickness of 0.5-1 mm.

[0012] Preferably, the heat collection plate assembly is connected to the top of the heat preservation device body via a magnetic-clamping composite structure, the magnetic-clamping composite structure comprising: Magnetic metal strips are embedded in the top edge of the insulation device body; Magnetic rubber blocks are positioned at the edge of the heat collector plate assembly, opposite to the magnetic metal strip. The snap-fit ​​protrusions are located at the bottom of the heat collector plate assembly, with one every 10-15 cm; A snap-fit ​​groove is provided on the top piece, opposite to the snap-fit ​​protrusion; The magnetic rubber block and the magnetic metal strip attract each other to initially fix the position of the heat collection plate assembly. The snap-fit ​​protrusion is aligned with the snap-fit ​​groove and inserted to achieve a stable installation of the heat collection plate assembly.

[0013] This utility model offers at least the following beneficial effects: First, by using a heat recovery device, it achieves efficient collection and reuse of heat lost from the top of the roasting furnace, effectively improving energy utilization and reducing production costs. Second, the heat collection plate assembly, heat conduction pipe system, heat exchanger, and heat storage module of this utility model work in synergy, with each component designed scientifically and rationally. For example, the arc-shaped heat collection plate increases the heat collection area, the microchannel accelerates heat conduction, the plate heat exchanger provides efficient heat exchange, and the heat storage module balances heat supply and demand. Third, the three-layer composite structure of the heat collection plate assembly enhances the performance and stability of the device, and the magnetic-clamping composite structure facilitates installation and ensures stability and reliability. Fourth, this utility model possesses advanced overall technology, providing an effective solution for energy conservation and emission reduction in the anode roasting process, and offering significant economic and environmental benefits.

[0014] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0015] Figure 1 This is a side view structural diagram of one technical solution of this utility model; Figure 2 This is a top view structural diagram of one technical solution of this utility model; Figure 3 This is a schematic diagram of the structure of a heat collection plate assembly according to one technical solution of this utility model.

[0016] 1. Roasting furnace body; 2. Insulation device body; 3. Top plate; 4. High-efficiency thermally conductive metal substrate; 5. Microchannel; 6. Thermally conductive connecting block; 7. Thermally conductive pipe; 8. Thermal insulation buffer layer; 9. Heat exchanger; 10. Thermal storage module; 11. Thermal fluid drive pump; 12. Valve; 13. High absorption rate black coating. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0018] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0019] It should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to fixed connection or setting, detachable connection or setting, or integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The terms "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] like Figure 1-3 As shown, this utility model provides a top insulation device for an anode roasting furnace with heat recovery function, including a roasting furnace body 1 and an insulation device body 2 disposed above the roasting furnace body 1, as well as a heat recovery device. The heat recovery device is installed on the top of the insulation device body 2. The heat recovery device includes a heat collection plate assembly. The heat collection plate assembly is made of a high-efficiency thermally conductive metal material. Its shape is an arc structure to fit the top plate 3 above the top of the insulation device. It has multiple microchannels 5 inside, which are filled with a thermally conductive medium. The lower surface is coated with a high-absorption black coating 13.

[0021] In this technical solution, a heat recovery device is added to achieve energy saving. This heat recovery device is installed on top of the insulation device body 2. The heat collection plate assembly in the heat recovery device is made of a high-efficiency thermally conductive metal material (such as aluminum alloy), and its shape is designed as an arc structure to perfectly fit the top plate 3 above the insulation device, ensuring a tight fit between the two. Multiple microchannels 5 are provided inside the heat collection plate assembly, and these microchannels 5 are evenly distributed within the heat collection plate assembly. The lower surface of the heat collection plate assembly is coated with a high-absorption black coating 13 to absorb the heat transferred from the top plate 3. In this technical solution, the arc-shaped heat collection plate assembly fits the top plate 3, increasing the heat collection area and significantly improving the heat collection efficiency. Water can be used as the heat transfer medium, with a filling ratio of 50%. After the heat collection plate absorbs heat, the water quickly vaporizes to form steam. When the steam flows upward, it liquefies upon encountering the cooler thermally conductive connecting block 6. The microchannels 5 facilitate rapid heat conduction within the heat collection plate assembly, improving the speed of heat collection. The high-absorption black coating 13 can fully absorb the heat lost from the top of the roasting furnace, converting more thermal energy into usable energy and effectively reducing heat waste. The insulation device body 2 of this technical solution adopts the solution provided in the top insulation device of an anode roasting furnace with heat recovery function and equipped with a top ejection mechanism disclosed in Chinese Patent Publication No. CN209147732U.

[0022] In another technical solution, the heat recovery device further includes a heat conduction pipe system 7, which is composed of a metal pipe with high temperature resistance and good thermal conductivity. One end is connected to the microchannel 5 outlet of the heat collection plate assembly, and the other end is connected to the heat exchanger 9. The pipe is wrapped with insulation material.

[0023] In this technical solution, the diameter of the metal pipe is rationally selected based on the heat output of the collector assembly and the requirements of the heat exchanger 9 to ensure smooth flow of the hot fluid. One end of the metal pipe is connected to the microchannel 5 outlet of the collector assembly via a sealed welding method to ensure no heat leakage at the connection; the other end is connected to the heat exchanger 9. To reduce heat loss during transmission, the pipe can be wrapped with insulation material (such as rock wool). The thickness of the insulation material is determined based on the environment of the pipe and the heat loss requirements, and the wrapping must be tight to prevent gaps. In this technical solution, the high-temperature resistant, high-thermal-conductivity metal pipe can efficiently transfer the heat collected by the collector assembly to the heat exchanger 9, ensuring efficient heat transfer. The insulation material wrapped around the pipe effectively reduces heat loss during transmission, improving the energy utilization rate of the entire heat recovery system.

[0024] In another technical solution, the heat exchanger 9 adopts a plate structure, with multiple heat exchange plates with corrugated structures inside to form hot and cold fluid channels. The hot fluid channels are connected to the heat conduction pipes 7, and the cold fluid channels are connected to external low-temperature fluids.

[0025] In this technical solution, the heat exchanger 9 adopts a plate structure with multiple corrugated heat exchange plates inside. These heat exchange plates are made of a highly thermally conductive metal material (such as stainless steel), and the corrugated structure design is optimized to increase fluid turbulence and improve heat exchange efficiency. Hot and cold fluid channels are formed between the heat exchange plates. The hot fluid channel is connected to the heat transfer pipe 7, and the cold fluid channel is connected to an external low-temperature fluid (such as chilled water or chilled air circulating within the factory). Flow regulating valves are installed at the inlet and outlet of the heat exchanger 9 to adjust the flow rate of the hot and cold fluids according to actual heat exchange requirements. In this technical solution, the plate-structured heat exchanger 9 features a compact structure and high heat exchange efficiency, enabling a large amount of heat exchange within a small space. The corrugated heat exchange plates increase fluid turbulence, ensuring full contact between the hot and cold fluids, further improving heat exchange efficiency and effectively transferring the recovered heat to the low-temperature fluid. The flow regulating valves allow for flexible control of the heat exchange process, adjusting the intensity of heat exchange according to actual needs, thus improving the system's adaptability and stability.

[0026] In another technical solution, the heat recovery device is further provided with a heat storage module 10. The heat storage module 10 uses a phase change material as the heat storage medium. The phase change material is encapsulated in multiple sealed metal containers, and the metal containers are connected to the hot fluid outlet of the heat exchanger 9.

[0027] In this technical solution, the thermal storage module 10 uses a phase change material (such as paraffin or hydrated salt) as the thermal storage medium. The phase change material is encapsulated in multiple sealed metal containers, which can be made of corrosion-resistant metal materials (such as aluminum alloy) to ensure the long-term stability of the phase change material. The metal containers are connected to the hot fluid outlet of the heat exchanger 9. When the heat exchanger 9 recovers a large amount of heat, the excess heat is transferred to the phase change material, causing it to undergo a phase change and store heat. When the stored heat is needed, the phase change material releases the heat, which is then transported to the area requiring heating through a heat transfer medium. The thermal storage module 10 can also be equipped with a temperature sensor and a control system to monitor the temperature of the phase change material in real time and control the storage and release of heat according to a set temperature range. In this technical solution, the thermal storage module 10 solves the problem of mismatch between heat recovery and usage time, enabling the storage of excess heat and its release when needed, thus improving energy utilization efficiency. The phase change material has a high thermal density, enabling it to store a large amount of heat in a small volume, reducing the footprint of the thermal storage module 10. The inclusion of temperature sensors and a control system enables intelligent control of the thermal storage module 10, ensuring the stability and accuracy of heat storage and release.

[0028] In another technical solution, the solar collector assembly adopts a three-layer composite structure, specifically including: The upper layer is a heat insulation buffer layer 8, which is composed of aerogel and glass fiber composite material and has a thickness of 3-5 mm. The middle layer is a high-efficiency thermally conductive metal substrate 4. Micro heat pipes with a diameter of 0.5-1 mm are uniformly distributed inside the high-efficiency thermally conductive metal substrate 4 to form microchannels 5. The micro heat pipes penetrate the high-efficiency thermally conductive metal substrate 4 vertically. An integrated thermally conductive connecting block 6 is provided at the top of the high-efficiency thermally conductive metal substrate 4 corresponding to the top position of the micro heat pipes. The thermally conductive connecting block 6 is made of the same alloy material as the micro heat pipes. The metal pipes of the thermally conductive pipe system 7 are connected to the thermally conductive connecting block 6 by welding, and the weld joint is subjected to multi-layer sealing treatment. The lower layer is a high-absorption black coating 13 with a thickness of 50-100 nm, which is used to significantly improve the absorption efficiency of infrared rays.

[0029] In this technical solution, aerogel has an extremely low thermal conductivity, effectively preventing heat loss to the outside. Glass fiber enhances the mechanical strength of the material, preventing damage to the heat collector assembly during installation and use. The middle layer is a high-efficiency thermally conductive metal substrate 4, which can be made of a novel aluminum-copper-silver alloy. Micro-heat pipes with a diameter of 0.5-1mm are uniformly distributed inside the metal substrate, forming microchannels 5. The micro-heat pipes vertically penetrate the high-efficiency thermally conductive metal substrate 4, and are filled with a thermally conductive medium (such as methanol) to quickly transfer the absorbed heat. The lower layer is a high-absorptivity black coating 13 with a thickness of 50-100 nm. This coating is applied using advanced nano-spraying technology, which can significantly improve the heat absorption efficiency. In this technical solution, the heat insulation buffer layer 8 effectively reduces heat loss, improves the heat collection efficiency of the heat collector assembly, and enhances the mechanical properties of the heat collector assembly, extending its service life. The combination of the high-efficiency thermally conductive metal substrate 4 and the micro-heat pipes enables rapid heat conduction, ensuring that the heat collector assembly can transfer the absorbed heat in a timely manner.

[0030] In another technical solution, a layer of thermally conductive silicone sheet is laid on the contact surface between the heat collection plate assembly and the top plate 3, and the thickness of the thermally conductive silicone sheet is 0.5-1 mm.

[0031] In this technical solution, the thermally conductive silicone pad possesses excellent thermal conductivity and flexibility, enabling it to fill the minute gaps between the heat collector assembly and the top plate 3, ensuring smooth heat transfer between them. The thermally conductive silicone pad is made of high-temperature resistant and aging-resistant materials, allowing it to operate stably for extended periods in high-temperature environments. The placement of the thermally conductive silicone pad enhances the thermal conductivity between the heat collector assembly and the top plate 3, reduces thermal resistance, and enables the heat collector assembly to more effectively collect the heat transferred from the top plate 3. The flexibility and gap-filling ability of the thermally conductive silicone pad ensures tight contact between the heat collector assembly and the top plate 3, improving the stability of heat transfer.

[0032] In another technical solution, the heat collection plate assembly is connected to the top of the heat preservation device body 2 via a magnetic attraction-clamping composite structure, the magnetic attraction-clamping composite structure comprising: Magnetic metal strips are embedded in the top edge of the insulation device body 2; Magnetic rubber blocks are positioned at the edge of the heat collector plate assembly, opposite to the magnetic metal strip. The snap-fit ​​protrusions are located at the bottom of the heat collector plate assembly, with one every 10-15 cm; A snap-fit ​​groove is provided on the top piece 3, opposite to the snap-fit ​​protrusion; The magnetic rubber block and the magnetic metal strip attract each other to initially fix the position of the heat collection plate assembly. The snap-fit ​​protrusion is aligned with the snap-fit ​​groove and inserted to achieve a stable installation of the heat collection plate assembly.

[0033] In this technical solution, the magnetic attraction-clamping composite structure includes a magnetic metal strip embedded in the top edge of the insulation device body 2, and a magnetic rubber block positioned on the edge of the heat collector assembly opposite to the magnetic metal strip. The magnetic rubber block and the magnetic metal strip attract each other, automatically and initially fixing the position of the heat collector assembly when it approaches the top of the insulation device body 2. Simultaneously, a clamping protrusion is provided every 10-15 cm at the bottom of the heat collector assembly, and a clamping groove is provided on the top plate 3 at a corresponding position, corresponding to the clamping protrusion. The groove wall of the clamping groove has an annular groove, and the clamping protrusion has an annular protrusion corresponding to the annular groove. During installation, the heat collector assembly is first roughly positioned using magnetic attraction, then the clamping protrusion is aligned with the clamping groove and inserted, and the annular protrusion engages in the annular groove, achieving a stable installation of the heat collector assembly. In this technical solution, the magnetic attraction makes the installation of the heat collector assembly more convenient and faster, enabling rapid initial positioning and improving installation efficiency. The snap-fit ​​structure provides a secure connection, ensuring that the heat collection plate assembly will not loosen or shift during use, thus guaranteeing the stability and reliability of the heat recovery device.

[0034] The technical principle of this utility model is as follows: During operation, the top of the anode baking furnace loses a significant amount of heat radiation. The high-absorption black coating 13 on the lower surface of the heat collector assembly efficiently absorbs infrared and visible light radiation and converts it into heat energy. The heat collector assembly adopts a three-layer composite structure. The micro heat pipes within the high-efficiency thermally conductive metal substrate 4 in the middle layer utilize the heat pipe principle to quickly conduct heat to the microchannels 5. The microchannels 5 transfer heat to the thermally conductive connecting blocks 6, which in turn transfer heat to the thermally conductive pipes 7 encased within them, allowing the heat to be carried away through the pipes. The upper heat-insulating buffer layer 8 prevents heat loss to the outside, ensuring that heat is concentrated and transferred to the thermally conductive pipes 7.

[0035] The heat-conducting pipe system 7 is responsible for transferring the heat collected by the collector plate assembly to the heat exchanger 9. High-temperature resistant, high-thermal-conductivity metal heat-conducting pipes 7 (such as copper pipes) serve as the heat transfer channel, and the external insulation material reduces heat loss during transmission. The heat-conducting fluid flows within the heat-conducting pipes 7, carrying heat from the collector plate assembly to the heat exchanger 9, ensuring that heat reaches the heat exchange area efficiently.

[0036] Hot fluid is driven into the hot fluid channel of heat exchanger 9 by a hot fluid drive pump on the heat transfer pipe 7. Simultaneously, an external low-temperature fluid (such as chilled water or air circulated within the factory) enters the cold fluid channel. According to the principle of heat transfer, heat is transferred from the high-temperature hot fluid to the low-temperature cold fluid. The recovered heat is transferred to the low-temperature fluid, which, after being heated, can be used in other processes, such as preheating materials to be processed or providing workshop heating, thus achieving heat recovery and reuse.

[0037] When heat exchanger 9 recovers more heat than is needed immediately, valve 12 opens, and the excess hot fluid is transported to the energy storage module through a pipe. The phase change material (such as paraffin or hydrated salt) in the energy storage module undergoes a phase change (from solid to liquid) after absorbing heat, storing a large amount of latent heat. When the stored heat is needed, the phase change material releases the latent heat, which is then transported to the area requiring heating via a heat transfer medium, thus balancing the heat supply and demand and further improving energy efficiency.

[0038] This invention achieves the purpose of heat recovery by effectively collecting, transmitting, exchanging and storing the heat lost from the top of the anode roasting furnace through the interconnection and coordinated operation of the heat collection plate assembly, the heat conduction pipe system 7, the heat exchanger 9 and the energy storage module, thus greatly improving the energy utilization efficiency and reducing energy waste.

[0039] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A top insulation device for an anode roasting furnace with heat recovery function, comprising a roasting furnace body and an insulation device body disposed above the roasting furnace body, characterized in that: It also includes a heat recovery device, which is installed on the top of the insulation device body. The heat recovery device includes a heat collection plate assembly, which is made of a high-efficiency thermally conductive metal material. Its shape is an arc structure to fit the top plate above the insulation device. It has multiple microchannels inside, and its lower surface is coated with a high-absorption black coating. The microchannels are filled with a thermally conductive medium.

2. The top insulation device for an anode roasting furnace with heat recovery function according to claim 1, characterized in that: The heat recovery device also includes a heat-conducting pipe system, which is composed of high-temperature resistant and thermally conductive metal pipes. One end of the pipes is connected to the microchannel of the heat collection plate assembly, and the other end is connected to the heat exchanger. The pipes are wrapped with insulation material.

3. The top insulation device for an anode roasting furnace with heat recovery function according to claim 2, characterized in that: The heat exchanger adopts a plate structure, with multiple corrugated heat exchange plates inside to form hot and cold fluid channels. The hot fluid channels are connected to heat-conducting pipes, and the cold fluid channels are connected to external low-temperature fluids.

4. The top insulation device for an anode roasting furnace with heat recovery function according to claim 3, characterized in that: The heat recovery device is also equipped with a heat storage module, which uses phase change material as the heat storage medium. The phase change material is encapsulated in multiple sealed metal containers, and the metal containers are connected to the hot fluid outlet of the heat exchanger.

5. The top insulation device for an anode roasting furnace with heat recovery function according to claim 2, characterized in that: The solar collector assembly adopts a three-layer composite structure, specifically including: The upper layer is a heat insulation buffer layer, which is composed of aerogel and glass fiber composite material and has a thickness of 3-5mm; The middle layer is a high-efficiency thermally conductive metal substrate. Micro heat pipes with a diameter of 0.5-1 mm are uniformly distributed inside the high-efficiency thermally conductive metal substrate to form microchannels. The micro heat pipes vertically penetrate the high-efficiency thermally conductive metal substrate. An integrated thermally conductive connecting block is set at the top of the high-efficiency thermally conductive metal substrate corresponding to the top position of the micro heat pipes. The thermally conductive connecting block is made of the same alloy material as the micro heat pipes. The metal pipes of the thermally conductive pipe system are connected to the thermally conductive connecting block by welding, and the weld joint is subjected to multi-layer sealing treatment. The lower layer is a high-absorption black coating with a thickness of 50-100 nm.

6. The top insulation device for an anode roasting furnace with heat recovery function according to claim 5, characterized in that: A layer of thermally conductive silicone sheet with a thickness of 0.5-1mm is laid on the contact surface between the heat collection plate assembly and the top plate.

7. The top insulation device for an anode roasting furnace with heat recovery function according to claim 5, characterized in that: The heat collection plate assembly is connected to the top of the heat preservation device body via a magnetic attraction-clamping composite structure, which includes: Magnetic metal strips are embedded in the top edge of the insulation device body; Magnetic rubber blocks are positioned at the edge of the heat collector plate assembly, opposite to the magnetic metal strip. The snap-fit ​​protrusions are located at the bottom of the heat collector plate assembly, with one every 10-15 cm; A snap-fit ​​groove is provided on the top piece, opposite to the snap-fit ​​protrusion; The magnetic rubber block and the magnetic metal strip attract each other to initially fix the position of the heat collection plate assembly. The snap-fit ​​protrusion is aligned with the snap-fit ​​groove and inserted to achieve a stable installation of the heat collection plate assembly.

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