Composite water jacket and metallurgical furnace

Abstract

The application discloses a composite water jacket, which comprises a titanium layer, a transition layer, a copper layer and a connecting layer arranged in sequence. The titanium layer is used for directly contacting with a melt and the like. The thermal expansion coefficient of the transition layer is between the thermal expansion coefficients of the titanium layer and the copper layer. The copper layer is provided with a cooling water channel, which can be communicated with a cooling mechanism. The connecting layer is connected with the copper layer and used for being connected with other structures of a furnace body, so that the installation of the composite water jacket is facilitated. Since the titanium layer can resist slag erosion and homogenous melting loss with crude copper, the transition layer can not only play a transition role between the titanium layer and the copper layer, but also avoid the direct contact of the melt with the copper layer after the titanium layer is worn out. In this way, the service life of the water jacket can be effectively prolonged, the long-term use requirement in a copper blowing furnace is met, the service life of the furnace body is greatly improved, the maintenance cost is reduced, the operation rate is improved, and the production cost is reduced. The application further discloses a metallurgical furnace.

Description

Technical Field

[0001] This application belongs to the technical field of metallurgical equipment, specifically relating to a composite water jacket and a metallurgical furnace. Background Technology

[0002] With technological advancements and cost control, copper smelting furnaces increasingly favor water jackets over refractory bricks for the molten zone walls. The molten material in the molten zone comprises an upper layer of slag, a middle layer of slag-copper mixture, and a lower layer of copper. The upper slag layer is highly corrosive. Furthermore, significant fluctuations occur in the molten layer during copper and slag tapping. This necessitates that the water jacket resist slag erosion while simultaneously preventing homogeneous melting by blister copper. Consequently, ordinary copper water jackets typically have a short service life and cannot meet the demands of long-term operation. Summary of the Invention

[0003] The technical problem to be solved by this application is that the existing copper water jacket has a short service life and cannot meet the requirements for long-term use in the molten zone of a copper smelting furnace. To solve this technical problem, a composite water jacket and a metallurgical furnace are provided. The composite water jacket can be applied to the molten zone of a copper smelting furnace and has a long service life.

[0004] The technical solution proposed in this application is as follows: A composite water jacket, comprising: The titanium layer is used to directly contact substances such as molten metal, and can effectively resist slag erosion without undergoing homogeneous melting loss with crude copper.

[0005] A transition layer is disposed on one side of the titanium layer. The coefficient of thermal expansion of the transition layer is between that of the titanium layer and the copper layer. The transition layer can prevent interlayer delamination or cracking caused by thermal stress due to thermal expansion mismatch between the titanium layer and the copper layer, slow down the heat conduction rate to the copper layer to a certain extent, prevent the copper layer from being subjected to excessive thermal shock, block high-temperature interdiffusion between the titanium layer and the copper layer, prevent interface embrittlement, and can also serve as a working layer in contact with the melt after the titanium layer is worn out, preventing the melt from directly contacting the copper layer, thereby effectively extending the service life of the composite water jacket.

[0006] A copper layer is disposed on the side of the transition layer opposite to the titanium layer, and the copper layer has a cooling water channel. The cooling water channel can be connected to a cooling mechanism, so that circulating cooling water is introduced into the cooling water channel through the cooling mechanism to cool the composite water jacket.

[0007] A connecting layer is provided on the side of the copper layer opposite to the transition layer, and is used to connect with other structures of the furnace body to facilitate the installation of the composite water jacket.

[0008] Furthermore, the thickness of the titanium layer is 3~8mm.

[0009] Furthermore, the transition layer is a nickel-chromium alloy layer with a thickness of 5-10 mm.

[0010] Furthermore, the connecting layer is either a carbon steel layer or a stainless steel layer, and its thickness is 10~25mm.

[0011] Furthermore, the thickness of the copper layer is 50~100mm.

[0012] Furthermore, the cross-sectional area of ​​the cooling water channel is 3×10. -4 ~20×10 -4 m 2 .

[0013] Furthermore, the titanium layer has a rough structure on the side opposite to the transition layer.

[0014] Furthermore, the rough structure is one or more of the following: dovetail groove, serrated groove, grid pattern, honeycomb structure, and concave-convex structure.

[0015] Furthermore, it also includes two sets of connecting pipes, both of which penetrate the connecting layer and the copper layer and are respectively connected to both ends of the cooling water channel. Both sets of connecting pipes can be connected to the cooling mechanism.

[0016] A metallurgical furnace, comprising the aforementioned composite water jacket.

[0017] The aforementioned composite water jacket is connected to the other structures of the furnace body via a connecting layer, enabling its installation. The titanium layer contacts the molten metal, while cooling water flows through the cooling water jacket in the copper layer, providing overall cooling for the composite water jacket. Because the titanium layer resists slag erosion and homogeneous melting loss with crude copper, the transition layer serves both as a transition between the titanium and copper layers and prevents direct contact between the molten metal and the copper layer after the titanium layer is worn away. This effectively extends the service life of the water jacket, meeting the requirements for long-term use in copper smelting furnaces, significantly improving the furnace's service life, reducing maintenance costs, increasing operating rates, and lowering production costs. Attached Figure Description

[0018] The accompanying drawings are provided to further understand this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof.

[0019] Figure 1 A cross-sectional view of a composite water jacket provided in an embodiment of this application; Figure 2 for Figure 1 The diagram shows another angle of the composite water jacket.

[0020] Label Explanation: 110. Titanium layer; 111. Rough structure; 120. Transition layer; 130. Copper layer; 131. Cooling channel; 140. Connecting layer; 150. Connecting pipe. Detailed Implementation

[0021] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0022] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and 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 application.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0024] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0025] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0026] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0027] To address the limitations of existing copper water jackets in meeting the requirements of the molten zone in copper smelting furnaces, this application provides a composite water jacket. This composite water jacket can be applied to the molten zone of a copper smelting furnace, effectively resisting slag erosion and homogeneous melting loss of crude copper during use, and has a long service life, meeting the requirements for long-term use. Furthermore, this application also provides a metallurgical furnace including the aforementioned composite water jacket. The metallurgical furnace can be a smelting furnace or other metallurgical furnace suitable for copper smelting, such as a melting furnace. The composite water jacket can be part of the furnace body and can be applied to the molten zone, contacting the melt.

[0028] like Figure 1 and Figure 2As shown, in one embodiment, the composite water jacket includes a titanium layer 110, a transition layer 120, a copper layer 130, and a connecting layer 140 stacked sequentially. The titanium layer 110 is used for direct contact with the molten material. Compared to a copper water jacket, the titanium layer 110 has stronger resistance to slag erosion and will not undergo homogeneous melting loss with the crude copper. The coefficient of thermal expansion of the transition layer 120 is between that of the titanium layer 110 and the copper layer 130. The transition layer 120 can prevent interlayer peeling or cracking caused by thermal stress due to thermal expansion mismatch between the titanium layer 110 and the copper layer 130, slow down the heat conduction rate to the copper layer 130 to a certain extent, prevent the copper layer 130 from experiencing excessive thermal shock, block high-temperature interdiffusion between the titanium layer 110 and the copper layer 130, prevent interface embrittlement, and can also serve as a working layer in contact with the molten material after the titanium layer 110 is worn out, preventing the molten material from directly contacting the copper layer 130, thereby effectively extending the service life of the composite water jacket. The copper layer 130 has cooling water channels 131 that can communicate with the cooling mechanism, thereby circulating cooling water into the cooling water channels 131 to cool the composite water jacket. The connecting layer 140 is connected to the copper layer 130 and is used to connect with other structures of the furnace body to facilitate the installation of the composite water jacket.

[0029] The aforementioned composite water jacket is used, with the connecting layer 140 connected to other structures of the furnace body to achieve the installation of the composite water jacket. The titanium layer 110 is in contact with the molten metal, and cooling water is circulated through the cooling water jacket in the copper layer 130, enabling overall cooling of the composite water jacket. Since the titanium layer 110 resists slag erosion and homogeneous melting loss with crude copper, the transition layer 120 serves both as a transition between the titanium layer 110 and the copper layer 130, and also prevents the molten metal from directly contacting the copper layer 130 after the titanium layer 110 is worn away. This effectively extends the service life of the water jacket, meeting the requirements for long-term use in copper smelting furnaces, significantly improving the furnace body's service life, reducing maintenance costs, increasing operating rates, and lowering production costs.

[0030] It should be noted that the cooling water channel 131 can be completely formed within the copper layer 130, and openings communicating with the cooling water channel 131 can be formed in both the copper layer 130 and the connecting layer 140, so that the cooling water channel 131 and the cooling mechanism can be connected through the openings in the copper layer 130 and the connecting layer 140. In other embodiments, the cooling water channel 131 can also be formed on the side of the copper layer 130 facing the connecting layer 140. When the connecting layer 140 is connected to the copper layer 130, it can seal the cooling water channel 131, forming a sealed channel, and an opening communicating with the cooling water channel 131 can be formed on the connecting layer 140, so that the cooling water channel 131 and the cooling mechanism can be connected through the opening.

[0031] In one embodiment, the thickness of the titanium layer 110 is 3-8 mm. It should be noted that the coefficient of thermal expansion of titanium is less than that of copper. To avoid the titanium layer 110 excessively affecting heat transfer to the copper layer 130, and to prevent premature wear of the titanium layer 110, the thickness of the titanium layer 110 is set to 3-8 mm. Preferably, the thickness of the titanium layer 110 is 3-5 mm, and most preferably, the thickness of the titanium layer 110 is 5 mm.

[0032] In one embodiment, the titanium layer 110 has a rough structure 111 on the side facing away from the transition layer 120, that is, the side of the titanium layer 110 that contacts the melt has a rough structure 111. In practical applications, the rough structure 111 can improve adhesion, facilitate the formation of slag protection, and further extend the service life of the water jacket. As an example, the rough structure 111 can be one or more of dovetail grooves, serrated grooves, mesh patterns, honeycomb structures, and uneven structures. For example, dovetail grooves can be provided in part of the surface of the titanium layer 110, and honeycomb structures can be provided in another part. There is no limitation here.

[0033] In one embodiment, the transition layer 120 is a nickel-chromium alloy layer. Further, the thickness of the transition layer 120 is 5-10 mm to insulate against heat while preventing excessive heat buildup in the titanium layer 110. Moreover, after the titanium layer 110 is worn away, the transition layer 120 of a certain thickness can still meet the requirements for continued use of the water jacket. Preferably, the thickness of the transition layer 120 is 5-6 mm.

[0034] In one embodiment, the thickness of the copper layer 130 is 50-100 mm to ensure sufficient space within the copper layer 130 for the arrangement of the cooling water channels 131, meeting the overall cooling requirements of the composite water jacket. Further, the cross-sectional area of ​​the cooling water channels 131 is 3 × 10⁻⁶ mm. -4 ~20×10 -4 m 2 This is to meet the cooling requirements of the composite water jacket. In addition, the cross-sectional shape of the cooling water channel 131 can be circular or rectangular, and there is no limitation on it.

[0035] In one embodiment, the connecting layer 140 is either a carbon steel layer or a stainless steel layer, which can be used to connect with other structures of the furnace body and also to improve the overall structural strength of the composite water jacket. The connecting layer 140 can be connected to other steel structures of the furnace body by bolts or welding, for example, to the furnace shell steel plate or reinforcing frame by bolts or welding. Furthermore, the thickness of the connecting layer 140 is 10-20 mm to facilitate connection with other structures of the furnace body.

[0036] In one embodiment, the composite water jacket further includes two sets of connecting pipes 150, both of which penetrate the connecting layer 140 and the copper layer 130, and are respectively connected to both ends of the cooling water channel 131. Additionally, the ends of both sets of connecting pipes 150 furthest from the cooling water channel 131 can be connected to the cooling mechanism. Specifically, the two sets of connecting pipes 150 are an inlet pipe group and a return pipe group, respectively. The cooling mechanism can input cooling water into the cooling water channel 131 through the inlet pipe group, and the cooling water flows back to the cooling mechanism through the return pipe group. Figure 1 In the illustrated embodiment, two cooling channels 131 are formed in the copper layer 130, corresponding to two inlet pipes in the inlet pipe group and two return pipes in the return pipe group. Each cooling channel 131 is connected to the inlet pipe and the return pipe at both ends, respectively. It can be determined that the diameters of the inlet pipe and the return pipe match the radial dimensions of the cooling channel 131.

[0037] Based on the above embodiments, it should be noted that the composite water jacket in the above embodiments can be prepared by 3D printing or ultra-high pressure pressing, or by preparing each layer first and then connecting the layers by explosive welding to achieve the preparation of the composite water jacket. In this way, it can be ensured that the interfaces of each layer in the composite water jacket are fused together, reducing the probability of separation.

[0038] In summary, the composite water jacket and metallurgical furnace provided in this application have at least the following advantages: 1. The titanium layer 110 can resist slag erosion and homogeneous melting loss of crude copper, thus extending the service life of the composite water jacket.

[0039] 2. The transition layer 120 can prevent thermal stress caused by thermal expansion mismatch between the titanium layer 110 and the copper layer 130, which could lead to interlayer peeling or cracking. It can also slow down the heat conduction rate to the copper layer 130 to a certain extent, prevent the copper layer 130 from being subjected to large thermal shocks, block the high-temperature interdiffusion between the titanium layer 110 and the copper layer 130, prevent interface embrittlement, and extend the service life of the composite water jacket.

[0040] 3. After the titanium layer 110 is worn out, the transition layer 120 can still serve as a working layer in contact with the melt, preventing the copper layer 130 from directly contacting the melt. It can also resist slag erosion and homogeneous melting loss of crude copper, further extending the service life of the composite water jacket.

[0041] 4. The titanium layer 110 has a rough structure 111 on the side of the surface opposite to the transition layer 120 to improve adhesion, facilitate the formation of slag protection, and further extend the service life of the composite water jacket.

[0042] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A composite water jacket, characterized in that, include: Titanium layer; A transition layer is disposed on one side of the titanium layer; A copper layer is disposed on the side of the transition layer opposite to the titanium layer, and the copper layer has cooling water channels that can communicate with a cooling mechanism. A connecting layer is disposed on the side of the copper layer opposite to the transition layer; The coefficient of thermal expansion of the transition layer is between that of the titanium layer and the copper layer.

2. The composite water jacket according to claim 1, characterized in that, The thickness of the titanium layer is 3~8mm.

3. The composite water jacket according to claim 1, characterized in that, The transition layer is a nickel-chromium alloy layer with a thickness of 5-10 mm.

4. The composite water jacket according to claim 1, characterized in that, The connecting layer is either a carbon steel layer or a stainless steel layer, and its thickness is 10~25mm.

5. The composite water jacket according to claim 1, characterized in that, The thickness of the copper layer is 50~100mm.

6. The composite water jacket according to claim 5, characterized in that, The cross-sectional area of ​​the cooling water channel is 3×10. -4 ~20×10 -4 m 2 .

7. The composite water jacket according to claim 1, characterized in that, The titanium layer has a rough structure on the side opposite to the transition layer.

8. The composite water jacket according to claim 7, characterized in that, The rough structure is one or more of the following: dovetail groove, serrated groove, grid pattern, honeycomb structure, and concave-convex structure.

9. The composite water jacket according to claim 1, characterized in that, It also includes two sets of connecting pipes, both of which penetrate the connecting layer and the copper layer and are respectively connected to both ends of the cooling water channel. Both sets of connecting pipes can be connected to the cooling mechanism.

10. A metallurgical furnace, characterized in that, Includes the composite water jacket as described in any one of claims 1-9.

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