Anti-expansion copper-steel composite water jacket smelting furnace

Abstract

The application provides an anti-expansion copper-steel composite water jacket smelting furnace, which comprises a furnace bottom and a furnace body, the furnace body comprises a multi-layer modular copper-steel composite water jacket, the modular copper-steel composite water jacket comprises a copper layer on a hot surface and a steel layer on a cold surface, the copper layer and the steel layer are still tightly combined and cannot be separated during thermal expansion and contraction; the steel layer of the modular copper-steel composite water jacket comprises a steel edge located at a periphery and a reinforcing rib located inside the steel edge, a plurality of fastening elements are arranged on the steel layer and used for fastening and connecting adjacent modular copper-steel composite water jackets; a furnace body reinforcing structure is arranged outside the furnace body, the steel layer of the modular copper-steel composite water jacket is fixedly connected to the furnace body reinforcing structure, so that expansion of the furnace body is limited; a furnace body sealing structure is arranged at the edge of the modular copper-steel composite water jacket, and the furnace body sealing structure is arranged in a concave-convex staggered lap joint mode and used for keeping the furnace body sealed when the furnace body expands. The anti-expansion copper-steel composite water jacket smelting furnace provided by the application improves the smelting efficiency and quality.

Description

Technical Field

[0001] This application relates to the field of metal smelting equipment, and in particular to an anti-expansion copper-steel composite water jacket smelting furnace. Background Technology

[0002] A pure copper water jacket is a common cooling device used in the metallurgical industry, typically in high-temperature smelting and melting processes. Made of pure copper, the jacket circulates cooling water into the tubes within the cooling system to lower the equipment temperature and maintain a suitable operating temperature.

[0003] The main disadvantages of pure copper water jackets include the following: 1. Prone to deformation: Compared to other materials, pure copper is relatively soft, which may cause pure copper water jackets to deform easily under high temperature conditions.

[0004] 2. Poor corrosion resistance: Pure copper is susceptible to corrosion by chemicals under certain conditions, especially in acidic or alkaline environments. This can shorten the lifespan of the copper water jacket and may cause water pollution.

[0005] 3. Limited strength and pressure resistance: Pure copper has poor strength and pressure resistance, and is relatively soft. Under certain high temperature, high pressure, or violent reaction conditions, pure copper water jackets may not be able to withstand the pressure, leading to leakage or mechanical damage.

[0006] 4. Higher cost: Pure copper is relatively expensive, especially in large-scale applications. This increases the cost of using pure copper water jackets.

[0007] Furthermore, traditional pure copper water jackets require bolted assembly with a steel frame before installation in the smelting furnace. During operation, the relatively soft nature of pure copper makes the water jacket prone to deformation. Additionally, the difference in expansion coefficients between the pure copper water jacket and the steel frame leads to cumulative misalignment, causing the gaps in the water jacket to widen. Although steel clamps are installed outside the smelting furnace, they can only slightly mitigate the gap formation, not eliminate it. Therefore, using pure copper water jackets often results in slag leakage, fire hazards, gas leaks, and even the rupture of the inlet and outlet copper pipes. Moreover, the high and stringent requirements for pure copper welding make on-site operation difficult and hinder equipment maintenance. Summary of the Invention

[0008] To address the technical problems existing in the prior art, this application proposes an anti-expansion copper-steel composite water jacket smelting furnace. By using an anti-expansion copper-steel composite water jacket, the phenomena of slag leakage, fire run-out, and gas leakage caused by smelting furnaces using pure copper water jackets are improved.

[0009] This application proposes an anti-expansion copper-steel composite water jacket smelting furnace, comprising: a furnace bottom; a furnace body, which includes a multi-layer modular copper-steel composite water jacket, wherein the multi-layer modular copper-steel composite water jacket includes a copper layer on a hot side and a steel layer on a cold side, and the copper layer and the steel layer remain tightly bonded and do not separate during thermal expansion and contraction; wherein the steel layer of the multi-layer modular copper-steel composite water jacket includes a steel edge located on the periphery and a reinforcing rib located inside the steel edge, and a plurality of fastening elements are provided on the steel layer for fastening adjacent multi-layer modular copper-steel composite water jackets; a furnace body reinforcement structure, which is disposed outside the furnace body, wherein the steel layer of the multi-layer modular copper-steel composite water jacket is fixedly connected to the furnace body reinforcement structure, thereby limiting the expansion of the furnace body; and a furnace body sealing structure, which is disposed at the edge of the multi-layer modular copper-steel composite water jacket, and the furnace body sealing structure is configured as a staggered overlapping joint to maintain its seal when the furnace body expands.

[0010] Optionally, all water jackets on the furnace body are modular, explosively composite copper-steel composite water jackets.

[0011] Optionally, the furnace body reinforcement structure includes a furnace bottom limiting device, which is sleeved around the furnace bottom and is higher than the furnace bottom. The furnace bottom limiting device is integrally formed with the multi-layer modular copper-steel composite water jacket and retains part of the steel layer exposed surface. By reinforcing the limiting steel structure on the exposed surface, the expansion of the bottom layer of the multi-layer modular copper-steel composite water jacket is restricted.

[0012] Optionally, the furnace body reinforcement structure includes a furnace body limiting device, which is sleeved around the middle part of the furnace body and tightly connected to the multi-layer modular copper-steel composite water jacket in the middle part of the furnace body to limit the expansion of the multi-layer modular copper-steel composite water jacket in the middle part of the furnace body; wherein, the fastening connection method is direct welding or welding of expansion sealing steel structure.

[0013] Optionally, the furnace body reinforcement structure includes a furnace body limiting device, which includes a frame erected around the furnace body. The furnace body limiting device is fastened to the multi-layer modular copper-steel composite water jacket in the middle of the furnace body to limit the expansion of the multi-layer modular copper-steel composite water jacket in the middle of the furnace body.

[0014] Optionally, for adjacent multi-layer modular copper-steel composite water jackets on the same plane, the fastening element makes the two steel edges of the adjacent multi-layer modular copper-steel composite water jackets close together and form surface contact, which is beneficial for steel welding after gaps appear.

[0015] Optionally, for adjacent multi-layer modular copper-steel composite water jackets that are not on the same plane, a steel plate is welded to the steel edge of one of the multi-layer modular copper-steel composite water jackets, and fastening elements are included on the steel plate. The fastening elements are fastened to each other with the fastening elements of the other multi-layer modular copper-steel composite water jacket, thereby bringing the steel edge of the other multi-layer modular copper-steel composite water jacket close to the side of the steel plate and forming a surface contact. This facilitates steel welding after gaps appear, and the copper layers on the hot surfaces of the two adjacent multi-layer modular copper-steel composite water jackets do not overlap.

[0016] Optionally, for adjacent multi-layer modular copper-steel composite water jackets that are not on the same plane, one multi-layer modular copper-steel composite water jacket has a first steel plate welded to its steel edge and includes a first fastening element on the first steel plate, and the other multi-layer modular copper-steel composite water jacket has a second steel plate welded to its steel edge and includes multiple second fastening elements on the second steel plate. The first fastening element and the second fastening element are fastened to each other, thereby bringing the first steel plate and the second steel plate of the two adjacent multi-layer modular copper-steel composite water jackets close together and forming a surface contact, which is beneficial for steel welding after gaps appear, and the copper layers of the hot surfaces of the two adjacent multi-layer modular copper-steel composite water jackets do not overlap.

[0017] Optionally, the furnace bottom includes a copper-steel composite water jacket, which includes a first steel layer on the hot side, a second steel layer on the cold side, and a copper layer between the first steel layer and the second steel layer.

[0018] Optionally, the furnace bottom copper-steel composite water jacket includes an outer edge of the water jacket extending beyond the bottom copper-steel composite water jacket of the furnace body. The surface of the outer edge of the water jacket includes a steel surface, and the steel surface is welded and fixed to the steel layer of the cold surface of the bottom copper-steel composite water jacket at multiple locations.

[0019] The anti-expansion copper-steel composite water jacket smelting furnace provided in the embodiments of this application has an inner layer made of copper and an outer layer made of steel. This not only ensures good thermal conductivity inside the smelting furnace, but also solves the problem of non-sealing at the connection points of traditional pure copper smelting furnaces by utilizing the easy welding properties of steel. This effectively improves the efficiency and quality of the metal smelting and melting process. Attached Figure Description

[0020] The preferred embodiments of this application will now be described in further detail with reference to the accompanying drawings, wherein: Figure 1 This is a three-dimensional structural schematic diagram of an anti-expansion copper-steel composite water jacket smelting furnace according to an embodiment of this application; Figure 2 yes Figure 1 The diagram shows the furnace bottom structure of the anti-expansion copper-steel composite water jacket smelting furnace. Figure 3This is a schematic diagram of the hot surface structure of an anti-expansion copper-steel composite water jacket according to an embodiment of this application; Figure 4 This is a schematic diagram of the cold surface structure of an anti-expansion copper-steel composite water jacket according to an embodiment of this application; and Figure 5 This is a three-dimensional structural diagram of an anti-expansion copper-steel composite water jacket located at the bottom of the furnace, according to an embodiment of this application.

[0021] Explanation of reference numerals in the attached figures: 100. Copper-steel composite water jacket smelting furnace; 10. Furnace bottom; 20. Furnace body; 201. Multi-layer modular copper-steel composite water jacket; 2011. Copper layer; 2012. Steel layer; 2013. Steel edge; 2014. Reinforcing rib; 2015. Through hole; 2111. Copper-steel composite water jacket located at the edge of the side wall water jacket; 2112. Adjacent copper-steel composite water jacket located on the other side; 2113. First layer of side wall water jacket; 101. Furnace bottom copper-steel composite water jacket; 103. Jacket edge; 202. Mounting base surface; 1011. Copper-steel composite water jacket located in the middle of the furnace bottom; 1012. Copper-steel composite water jacket located at the edge of the furnace bottom; 1013. Copper-steel composite water jacket located at the edge; 2016. Raised edge; 1014. Furnace bottom limiting device. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] In the following detailed description, reference can be made to the accompanying drawings, which form part of this application and illustrate specific embodiments of the present application. In the drawings, similar reference numerals describe substantially similar components in different figures. Specific embodiments of the present application are described in sufficient detail below to enable those skilled in the art to implement the technical solutions of the present application. It should be understood that other embodiments may also be utilized, or structural, logical, or electrical changes may be made to the embodiments of the present application.

[0024] The copper-steel composite water-jacketed smelting furnace is a commonly used piece of equipment for smelting and melting metals. It consists of two furnace layers: an inner layer made of copper and an outer layer made of steel, with water filling the space between the two layers and circulating cooling through a cooling system. The function of the copper-steel composite water-jacketed smelting furnace is to effectively protect the furnace body and improve the smelting process. The copper-steel composite water jacket offers advantages such as high-temperature resistance, corrosion resistance, rapid cooling, energy saving, and significantly improved production efficiency. The advantages of using a copper-steel composite water jacket are as follows: 1. High-temperature resistance: Copper, as an inner layer material, has excellent high-temperature resistance, capable of withstanding molten metal in a high-temperature furnace and the high-temperature environment during smelting, and is not easily melted or deformed. Therefore, the use of a copper layer on the hot surface in this application can meet the requirements for thermal conductivity.

[0025] 2. Corrosion Resistance: Steel, as the outer layer material, resists corrosion and chemical attack, and allows multiple water jackets to be easily fixed together by welding. Therefore, steel as the outer layer material can provide effective protection for the furnace body and extend its service life.

[0026] 3. Rapid cooling: Cooling water is transported through a circulating cooling system in the water jacket formed on the outer layer of the furnace body, which can rapidly reduce the furnace body temperature in order to control and stabilize the smelting process.

[0027] 4. Energy saving: The cooling system of the copper-steel composite water jacket smelting furnace can recover and utilize waste heat, reduce energy consumption, and improve energy utilization efficiency.

[0028] 5. Improve production efficiency: Due to the good heat resistance and corrosion resistance of the copper-steel composite water jacket smelting furnace, it can achieve continuous operation at high temperatures, thereby improving the efficiency of smelting and melting.

[0029] Therefore, copper-steel composite water jacket smelting furnaces are widely used in the metallurgical industry due to their advantages such as high temperature resistance, corrosion resistance, rapid cooling, energy saving, and improved production efficiency, thereby improving the efficiency and quality of metal smelting and melting processes.

[0030] Figure 1 This is a three-dimensional structural schematic diagram of an anti-expansion copper-steel composite water jacket smelting furnace according to an embodiment of this application. Figure 2 yes Figure 1 The diagram shows the furnace bottom structure of the anti-expansion copper-steel composite water jacket smelting furnace. Figure 3 This is a schematic diagram of the hot surface structure of an anti-expansion copper-steel composite water jacket according to an embodiment of this application. Figure 4 This is a schematic diagram of the cold surface structure of an anti-expansion copper-steel composite water jacket according to an embodiment of this application. (Combined with...) Figures 1-4As shown, the expansion-resistant copper-steel composite water jacket smelting furnace 100 includes a furnace bottom 10 and a furnace body 20. The furnace bottom 10 includes a furnace bottom copper-steel composite water jacket 101, which includes a first steel layer on the hot side, a second steel layer on the cold side, and a copper layer between the first and second steel layers. The entire furnace bottom water jacket of this application is a three-layer composite. This three-layer composite water jacket has a stainless steel composite hot side, which is wear-resistant, high-temperature resistant, and corrosion-resistant, improving its service life and enhancing the ability of hot materials to resist impact deformation when falling into the furnace from a height. The heat-conducting layer optimizes the water channel structure, effectively dissipating sudden heat increase. The cold side is a truss-type steel structure, which is stable and can effectively bear the entire weight of the smelting furnace during operation and resist thermal shock deformation. At the same time, the stainless steel composite hot side is also easy to install with functional structures to protect the water jacket; it prevents the leakage of materials inside the furnace and slows down deformation. In the event of deformation, the back side can be directly welded to prevent the leakage of materials inside the furnace and improve the on-site environment.

[0031] The furnace bottom copper-steel composite water jacket 101 also includes an outer edge of the water jacket extending beyond the bottom copper-steel composite water jacket of the furnace body 20. The outer edge of the water jacket includes a steel surface, which is welded and fixed to the steel layer of the cold side of the bottom copper-steel composite water jacket at multiple locations. The furnace body 20 includes a multi-layer modular copper-steel composite water jacket 201, which includes a copper layer 2011 on the hot side and a steel layer 2012 on the cold side. The copper-steel composite water jacket welded using explosive composite technology results in good mechanical properties of the furnace body, ensuring that the copper layer 2011 and the steel layer 2012 remain tightly bonded and do not separate during thermal expansion and contraction. All water jackets on the furnace body 20 are multi-layer modular copper-steel composite water jackets 201.

[0032] The multi-layer modular copper-steel composite water jacket includes a steel layer 2012 with peripheral steel edges 2013 and reinforcing ribs 2014 inside the steel edges 2013. Multiple fastening elements (not shown in the figure) are provided on the steel layer 2012 to securely connect adjacent multi-layer modular copper-steel composite water jackets. For adjacent multi-layer modular copper-steel composite water jackets on the same plane, the fastening elements ensure that the two steel edges 2013 of the adjacent multi-layer modular copper-steel composite water jackets are close together and form surface contact, which facilitates steel welding after gaps appear. In some embodiments of this application, such as... Figure 4 As shown, adjacent multi-layer modular copper-steel composite water jackets 201 can be fastened to each other by inserting fastening elements through through holes 2015 located on the steel edge 2013.

[0033] In some embodiments of this application, for adjacent multi-layer modular copper-steel composite water jackets that are not on the same plane, that is, adjacent multi-layer modular copper-steel composite water jackets located at the corner of the furnace body, a steel plate is welded to the steel edge 2013 of one of the multi-layer modular copper-steel composite water jackets, and fastening elements are included on the steel plate. The fastening elements are fastened to each other with the fastening elements of the other multi-layer modular copper-steel composite water jacket, thereby bringing the steel edge of the other multi-layer modular copper-steel composite water jacket close to the side of the steel plate and forming a surface contact, which is beneficial for steel welding after gaps appear, and the copper layers of the hot surfaces of the two adjacent multi-layer modular copper-steel composite water jackets do not overlap.

[0034] In other embodiments of this application, for adjacent multi-layer modular copper-steel composite water jackets that are not on the same plane, that is, adjacent multi-layer modular copper-steel composite water jackets located at the corner of the furnace body, one multi-layer modular copper-steel composite water jacket has a first steel plate welded to its steel edge and includes a first fastening element on the first steel plate, and the other multi-layer modular copper-steel composite water jacket has a second steel plate welded to its steel edge and includes multiple second fastening elements on the second steel plate. The first fastening element and the second fastening element are fastened to each other, thereby bringing the first steel plate and the second steel plate of the two adjacent multi-layer modular copper-steel composite water jackets close together and forming a surface contact, which is beneficial for steel welding after gaps appear, and the copper layers of the hot surfaces of the two adjacent multi-layer modular copper-steel composite water jackets do not overlap.

[0035] Figure 5 This is a three-dimensional structural diagram of an anti-expansion copper-steel composite water jacket located at the edge of the furnace bottom, according to an embodiment of this application. A furnace body reinforcement structure is provided outside the furnace body 20, wherein the steel layer 2012 of the multi-layer modular copper-steel composite water jacket 201 is fixedly connected to the furnace body reinforcement structure, thereby limiting the expansion of the furnace body 20.

[0036] In some embodiments of this application, the furnace body reinforcement structure includes a furnace bottom limiting device 1014 fitted around the furnace bottom 10 and higher than the furnace bottom 10. The furnace bottom limiting device 1014 is integrally formed with the multi-layer modular copper-steel composite water jacket 201 and retains part of the exposed steel layer. By reinforcing the limiting steel structure on the exposed surface, the expansion of the bottom multi-layer modular copper-steel composite water jacket 201 is restricted.

[0037] In other embodiments of this application, the furnace body reinforcement structure includes a furnace body limiting device fitted around the middle part of the furnace body and fastened to the multi-layer modular copper-steel composite water jacket 201 in the middle of the furnace body 20, restricting the expansion of the multi-layer modular copper-steel composite water jacket in the middle of the furnace body 20; wherein, the fastening connection method is direct welding, or welding an expansion-sealing steel structure. The cold surface of the copper-steel composite water jacket in this application is entirely steel, which is easy to install on site and avoids the difficulty of repair due to damage to pure copper water pipes.

[0038] In some embodiments of this application, the copper-steel composite water jacket forming the furnace bottom 10 has at least three specific forms: a copper-steel composite water jacket 1011 located in the middle of the furnace bottom, a copper-steel composite water jacket 1012 located at the edge of the furnace bottom, and a copper-steel composite water jacket 1013 located at opposite edges. Since the furnace bottom water jacket formed by combining multiple copper-steel composite water jackets is a rectangular plate structure, with its edges forming the rectangular mounting base surface 202, the specific structures of the copper-steel composite water jackets located at different positions differ. Figure 2 and Figure 3 The copper-steel composite water jacket shown is copper-steel composite water jacket 1011 located in the middle of the furnace bottom. Figure 5 The diagram shown is a three-dimensional structural schematic of the copper-steel composite water jacket located at the edge of the furnace bottom. (Combined with...) Figure 2 , Figure 3 and Figure 5 As shown, although both copper-steel composite water jackets are used to form the furnace bottom, their specific structures are not exactly the same. The main difference is that the copper-steel composite water jacket 1012 located at the edge of the furnace bottom has a sleeve edge 103 on three edges, while the copper-steel composite water jacket 1011 located in the middle of the furnace bottom only has a sleeve edge 103 on two opposite edges.

[0039] Combination Figure 1 and Figure 3 As shown, the anti-expansion copper-steel composite water jacket smelting furnace of this application also includes a furnace body sealing structure, which is disposed at the edge of the multi-layer modular copper-steel composite water jacket. The furnace body sealing structure is configured with staggered overlapping joints to maintain its seal when the furnace body expands. In some embodiments of this application, a protruding edge 2016 is provided on one side edge of the copper-steel composite water jacket 2111 located on the side wall water jacket edge. This protruding edge 2016 and the protruding edge 2016 of the adjacent copper-steel composite water jacket 2112 located on the other side are staggered and connected and fixed.

[0040] In other embodiments of this application, the copper-steel composite water jacket 201 forming the furnace body 20 has various forms. Specifically, the copper-steel composite water jacket located in the middle of each layer of sidewall water jackets and the copper-steel composite water jacket located at the edge of the sidewall water jackets have different structures. For example... Figure 1 As shown, the main difference between the two copper-steel composite water jackets is that the copper-steel composite water jacket 2111 located on the side wall water jacket edge is provided with a protruding edge 2016 on one side edge. The protruding edge 2016 and the protruding edge 2016 of the adjacent second copper-steel composite water jacket 2012 located on the other side are connected and fixed after being staggered and overlapped.

[0041] This application proposes an anti-expansion copper-steel composite water jacket smelting furnace, with an inner layer made of copper and an outer layer made of steel. This not only ensures good thermal conductivity inside the smelting furnace, but also solves the problem of non-sealing at the joints of traditional pure copper smelting furnaces by utilizing the easy welding properties of steel. This effectively improves the efficiency and quality of the metal smelting and melting process.

[0042] The above embodiments are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art can make various changes and modifications without departing from the scope of this application. Therefore, all equivalent technical solutions should also fall within the scope of this application.

Claims

1. An anti-expansion copper-steel composite water-jacketed smelting furnace, characterized in that, include: Furnace bottom; The furnace body includes a multi-layer modular copper-steel composite water jacket, which comprises a copper layer on the hot side and a steel layer on the cold side, and the copper layer and the steel layer remain tightly bonded together without separating during thermal expansion and contraction; wherein, the steel layer of the multi-layer modular copper-steel composite water jacket includes a steel edge located on the periphery and a reinforcing rib located inside the steel edge, and a plurality of fastening elements are provided on the steel layer for fastening adjacent multi-layer modular copper-steel composite water jackets; A furnace body reinforcement structure is provided outside the furnace body, wherein the steel layer of the multi-layer modular copper-steel composite water jacket is fixedly connected to the furnace body reinforcement structure, thereby limiting the expansion of the furnace body; and The furnace body sealing structure is located at the edge of the multi-layer modular copper-steel composite water jacket. The furnace body sealing structure is configured with staggered joints to maintain its seal when the furnace body expands. All water jackets on the furnace body are modular copper-steel composite water jackets welded using explosive composite technology. The furnace body reinforcement structure includes a furnace bottom limiting device, which is sleeved around the furnace bottom and is higher than the furnace bottom. The furnace bottom limiting device is integrally formed with the multi-layer modular copper-steel composite water jacket, and a portion of the steel layer is exposed. By reinforcing the limiting steel structure on the exposed surface, the expansion of the bottom multi-layer modular copper-steel composite water jacket is restricted.

2. The anti-expansion copper-steel composite water-jacketed smelting furnace according to claim 1, characterized in that, The furnace body reinforcement structure includes a furnace body limiting device, which is sleeved around the middle part of the furnace body and tightly connected to the multi-layer modular copper-steel composite water jacket in the middle part of the furnace body to restrict the expansion of the multi-layer modular copper-steel composite water jacket in the middle part of the furnace body; wherein, the fastening connection method is direct welding or welding of expansion sealing steel structure.

3. The anti-expansion copper-steel composite water-jacketed smelting furnace according to claim 1, characterized in that, The furnace body reinforcement structure includes a furnace body limiting device, which includes a frame erected around the furnace body. The furnace body limiting device is tightly connected to the multi-layer modular copper-steel composite water jacket in the middle of the furnace body, thereby limiting the expansion of the multi-layer modular copper-steel composite water jacket in the middle of the furnace body.

4. The anti-expansion copper-steel composite water-jacketed smelting furnace according to claim 1, characterized in that, For adjacent multi-layer modular copper-steel composite water jackets on the same plane, the fastening element makes the two steel edges of the adjacent multi-layer modular copper-steel composite water jackets close together and form surface contact, which is beneficial for steel welding after gaps appear.

5. The anti-expansion copper-steel composite water-jacketed smelting furnace according to claim 1, characterized in that, For adjacent multi-layer modular copper-steel composite water jackets that are not on the same plane, a steel plate is welded to the steel edge of one of the multi-layer modular copper-steel composite water jackets, and fastening elements are included on the steel plate. The fastening elements are fastened to each other with the fastening elements of the other multi-layer modular copper-steel composite water jacket, thereby bringing the steel edge of the other multi-layer modular copper-steel composite water jacket close to the side of the steel plate and forming a surface contact. This facilitates steel welding after gaps appear, and the copper layers on the hot surfaces of the two adjacent multi-layer modular copper-steel composite water jackets do not overlap.

6. The anti-expansion copper-steel composite water-jacketed smelting furnace according to claim 1, characterized in that, For multi-layer modular copper-steel composite water jackets that are not adjacent on the same plane, one multi-layer modular copper-steel composite water jacket has a first steel plate welded to its steel edge and includes a first fastening element on the first steel plate, and the other multi-layer modular copper-steel composite water jacket has a second steel plate welded to its steel edge and includes multiple second fastening elements on the second steel plate. The first fastening element and the second fastening element are fastened to each other, thereby bringing the first steel plate and the second steel plate of the two adjacent multi-layer modular copper-steel composite water jackets close together and forming a surface contact, which is beneficial for steel welding after gaps appear, and the copper layers of the hot surfaces of the two adjacent multi-layer modular copper-steel composite water jackets do not overlap.

7. The anti-expansion copper-steel composite water-jacketed smelting furnace according to claim 1, characterized in that, The furnace bottom includes a copper-steel composite water jacket, which comprises a first steel layer on the hot side, a second steel layer on the cold side, and a copper layer between the first steel layer and the second steel layer.

8. The anti-expansion copper-steel composite water-jacketed smelting furnace according to claim 7, characterized in that, The furnace bottom copper-steel composite water jacket includes an outer edge of the water jacket extending beyond the bottom copper-steel composite water jacket of the furnace body. The surface of the outer edge of the water jacket includes a steel surface, and the steel surface is welded and fixed to the steel layer of the cold surface of the bottom copper-steel composite water jacket at multiple locations.

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