A graphite lined crystallization apparatus for a copper rod on a bushing

Abstract

The utility model discloses a graphite lining crystallization device of copper pole upper lead furnace, including lining pipe, cooling pipe and protective sheath, cooling pipe fixedly covers the outside of lining pipe, and cooling pipe includes bottom cooling area, middle cooling area and top cooling area in proper order from bottom to top, and bottom cooling area carries out cooling to the bottom of lining pipe through a cooling water path, and top cooling area carries out cooling to the top of lining pipe through a cooling water path, and middle cooling area carries out cooling to the middle of lining pipe through two intertangled cooling water paths, and the bottom of protective sheath passes through lining pipe and is fixedly covered and arranged on the outside of bottom cooling area, in the utility model, middle cooling area carries out cooling to the middle of lining pipe through two intertangled cooling water paths, and this design provides more extensive cooling coverage, is helpful to the even forming of copper pole middle part, reduces the internal stress caused by temperature gradient, and solves the problem of uneven copper pole internal organization caused by traditional middle cooling uneven.

Description

Technical Field

[0001] This utility model relates to the technical field of crystallization devices, specifically a graphite-lined crystallization device for a copper rod-driven furnace. Background Technology

[0002] Traditional crystallizers often have a cooling structure to cool the copper rod. A common cooling structure consists of two layers of cooling pipes, with their bottoms connected. An inlet is located at the top of the inner cooling pipe, and an outlet is located at the top of the outer cooling pipe.

[0003] The two cooling pipes are interconnected at the bottom. After flowing to the bottom of the inner cooling pipe, the coolant enters the outer cooling pipe through the connection. During this process, the low-temperature coolant in the inner pipe preferentially cools the top of the copper rod. By the time it flows through the middle area, the coolant has partially heated up and cannot meet the high cooling demand from the copper rod in the middle area. When it flows to the bottom, the coolant absorbs a large amount of heat and flows to the outer pipe. At this point, the high-temperature coolant "reverses" to cool the middle area, further affecting the cooling effect in the middle area and causing uneven internal structure of the copper rod. Utility Model Content

[0004] To address the aforementioned shortcomings, this invention proposes a graphite lining crystallization device for an upward-drawing furnace of a copper rod. The central cooling zone cools the middle part of the lining tube through two intertwined cooling water channels. This design provides a wider cooling coverage, which helps to achieve uniform forming in the middle of the copper rod, reduces internal stress caused by temperature gradients, and solves the problem of uneven internal structure of the copper rod caused by uneven cooling in the middle in traditional methods.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A graphite-lined crystallization apparatus for a copper rod-driven furnace includes an inner lining tube, a cooling tube, and a protective sleeve.

[0007] The cooling pipe is fixedly sleeved on the outside of the inner liner tube. The cooling pipe includes a bottom cooling zone, a middle cooling zone and a top cooling zone from bottom to top. The bottom cooling zone cools the bottom of the inner liner tube through a cooling water channel. The top cooling zone cools the top of the inner liner tube through a cooling water channel. The middle cooling zone cools the middle of the inner liner tube through two intertwined cooling water channels.

[0008] The bottom of the protective sleeve passes through the inner liner tube and is fixedly fitted onto the outside of the bottom cooling zone.

[0009] The cooling pipe includes a first wrapping part, a first winding part, a second winding part, and a second wrapping part. The first wrapping part wraps around the bottom of the inner liner pipe to form a bottom cooling zone. A first water inlet is provided at the top of the first wrapping part. The first wrapping part and the first winding part are interconnected. A first water outlet is provided at the end of the first winding part.

[0010] The second wrapping part wraps around the bottom of the inner liner tube to form a top cooling zone. The top of the second wrapping part is provided with a second water outlet. The second winding part and the second wrapping part are connected to each other. The end of the second winding part is provided with a second water inlet.

[0011] The first winding portion and the second winding portion together wrap around the middle part of the inner liner tube to form a central cooling zone.

[0012] The first wrapping part is provided with a first partition plate inside. Two first partition plates are arranged opposite each other and vertically divide the interior of the first wrapping part to form a water inlet cavity and a water outlet cavity. The bottom of the water outlet cavity and the bottom of the water inlet cavity are connected to each other. The top of the water outlet cavity is connected to the interior of the second winding part. The first water inlet is connected to the water inlet cavity, and the first water outlet is connected to the water outlet cavity.

[0013] The first winding portion and the second winding portion are arranged in the same spiral direction.

[0014] The bottom of the inner liner is provided with a sealing plate, and the side wall of the inner liner is provided with a plurality of liquid passage holes, which penetrate the side wall of the inner liner.

[0015] The liquid passage is inclined from the outside to the bottom.

[0016] The cooling pipe is made of copper alloy or oxygen-free copper.

[0017] The inner lining tube includes a graphite tube and a copper tube, with multiple graphite tubes spliced ​​together and disposed on the inner wall of the copper tube.

[0018] The technical solution of this utility model can include the following beneficial effects:

[0019] 1. The central cooling zone cools the middle part of the inner liner tube through two intertwined cooling water channels. This design provides a wider cooling coverage, which helps to form a uniform shape in the middle of the copper rod, reduces internal stress caused by temperature gradient, and solves the problem of uneven internal structure of copper rod caused by uneven cooling in the middle in the traditional method.

[0020] 2. The first wrapping section is located at the bottom, providing initial wrapping cooling for the molten copper just entering the inner liner tube. This rapidly reduces the initial temperature of the molten copper, preventing damage to the bottom of the inner liner tube from high temperatures, and simultaneously creating favorable conditions for the initial crystallization of the molten copper at the bottom. The second wrapping section is located at the top, providing the final stage of cooling for the copper rod that is about to complete crystallization. This ensures that the copper rod reaches the ideal temperature and crystallization state before exiting the furnace, improving the surface quality and mechanical properties of the copper rod. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a crystallization apparatus according to one embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the second wrapping part and the second winding part in one embodiment of this utility model;

[0023] Figure 3 This is a cross-sectional view of the inner liner tube according to one embodiment of this utility model;

[0024] Among them, 1. Inner liner tube; 10. Sealing plate; 11. Liquid passage hole; 21. First wrapping part; 22. First winding part; 23. First water inlet; 24. First water outlet; 31. Second winding part; 32. Second wrapping part; 33. Second water inlet; 34. Second water outlet; 4. Protective sleeve. Detailed Implementation

[0025] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0026] In the description of this utility model, it should be understood that the terms "length", "middle", "upper", "lower", "left", "right", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0027] 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 one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "assembly," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] The following is combined Figures 1 to 2 This invention describes a graphite-lined crystallization apparatus for a copper rod-driven furnace according to an embodiment of the present invention.

[0030] A graphite-lined crystallization apparatus for a copper rod-driven furnace includes an inner lining tube 1, a cooling tube, and a protective sleeve 4.

[0031] The cooling pipe is fixedly sleeved on the outside of the inner liner 1. The cooling pipe includes a bottom cooling zone, a middle cooling zone and a top cooling zone from bottom to top. The bottom cooling zone cools the bottom of the inner liner 1 through a cooling water channel. The top cooling zone cools the top of the inner liner 1 through a cooling water channel. The middle cooling zone cools the middle of the inner liner 1 through two intertwined cooling water channels.

[0032] The bottom of the protective sleeve 4 passes through the inner liner tube 1 and is fixedly fitted onto the outside of the bottom cooling zone.

[0033] When the molten copper enters the crystallization device from the bottom of the inner liner tube 1, the inner liner tube 1 has good thermal conductivity and high temperature resistance, which can provide a stable and suitable temperature environment for the crystallization of the molten copper. This ensures that the temperature distribution of the molten copper is uniform during the crystallization process, effectively reduces crystal defects caused by uneven temperature, thereby improving the crystallization quality of the copper rod, ensuring that the internal structure of the copper rod is uniform and dense, and enhancing its mechanical and electrical properties.

[0034] Next, the copper liquid reaches an extremely high temperature at the bottom of the inner liner tube 1. The bottom cooling zone cools the bottom of the inner liner tube 1 through a cooling water channel, ensuring that the copper liquid solidifies rapidly after entering the crystallization device, forming a stable bottom structure for the copper rod. The middle cooling zone cools the middle of the inner liner tube through two intertwined cooling water channels. This design provides broader cooling coverage, contributing to uniform forming of the middle of the copper rod and reducing internal stress caused by temperature gradients. The top cooling zone also cools the top of the inner liner tube through a cooling water channel, ensuring that the copper rod is completely solidified before leaving the crystallization device, improving the surface quality of the copper rod.

[0035] In traditional cooling structures, insufficient cooling often occurs in the central area. In this application, the cooling pipe is provided with a bottom cooling zone, a middle cooling zone, and a top cooling zone, which can form a better cooling zone for the central area of ​​the graphite liner, enhance the cooling effect on the middle part of the liner tube 1, and solve the problem of uneven internal structure of the copper rod caused by uneven cooling in the middle in traditional methods.

[0036] In addition, the protective sleeve 4 can not only protect the cooling pipe from external devices, but also effectively prevent the high temperature heat from the outside from directly acting on the cooling pipe, which would lead to poor cooling effect.

[0037] The cooling pipe includes a first wrapping part 21, a first winding part 22, a second winding part 31, and a second wrapping part 32. The first wrapping part 21 wraps the bottom of the inner liner pipe 1 to form a bottom cooling area. A first water inlet 23 is provided at the top of the first wrapping part 21. The first wrapping part 21 and the first winding part 22 are interconnected. A first water outlet 24 is provided at the end of the first winding part 22.

[0038] The second wrapping part 31 wraps around the bottom of the inner liner tube 1 to form a top cooling area. The top of the second wrapping part 32 is provided with a second water outlet 34. The second winding part 31 and the second wrapping part 32 are connected to each other. The end of the second winding part 31 is provided with a second water inlet 33.

[0039] The first winding portion 22 and the second winding portion 31 together wrap around the middle part of the inner liner tube 1 to form a central cooling zone.

[0040] The first wrapping section 21, located at the bottom, provides initial wrapping cooling for the molten copper just entering the inner liner tube 1, rapidly reducing the initial temperature of the molten copper and preventing damage to the bottom of the inner liner tube 1 from high temperatures. It also creates favorable conditions for the initial crystallization of the molten copper at the bottom. The second wrapping section 32, located at the top, provides final cooling for the copper rod that is about to complete crystallization, ensuring that the copper rod reaches the ideal temperature and crystallization state before exiting the furnace, thus improving the surface quality and mechanical properties of the copper rod.

[0041] The first winding portion 22 and the second winding portion 31 together wrap around the middle part of the inner liner tube 1, greatly enhancing the cooling effect on the middle part of the inner liner tube 1. During the upward drawing of the copper rod, the middle region, being in the middle position, has relatively complex heat transfer and is prone to insufficient cooling. The arrangement of the first winding portion 22 and the second winding portion 31 increases the contact time between the coolant and the inner liner tube 1, allowing the coolant to absorb heat more fully, effectively reducing the temperature in the middle region, forming a uniform temperature gradient, which is conducive to the formation of a dense and uniform microstructure in the middle region of the copper rod, reducing the generation of internal stress and defects, and improving the overall quality of the copper rod.

[0042] Meanwhile, the first inlet 23 is located in the first wrapping part 21, allowing the coolant to enter from the top of the first wrapping part 21, flow naturally downwards under gravity, evenly fill the entire first wrapping part 21, and then be discharged from the first outlet of the first winding part 22. During the flow process, the coolant can fully exchange heat with the inner liner tube 1, carrying away heat. At the same time, the position of the inlet avoids the coolant directly impacting the inner liner tube 1 upon entry, reducing turbulence and pressure fluctuations caused by impact and ensuring the stability of the cooling process.

[0043] At the bottom of the second winding section 31, the second inlet 33 allows the coolant to flow upwards, facilitating thorough heat exchange with the second winding section 31 and the second wrapping section 32. This combined upper and lower coolant flow path increases the contact time and area between the coolant and the inner liner tube 1, improving heat exchange efficiency and thus enhancing the cooling effect.

[0044] The first wrapping part 21 is provided with a first partition plate inside. Two first partition plates are arranged opposite each other and vertically divide the interior of the first wrapping part 21 to form a water inlet cavity and a water outlet cavity. The bottom of the water outlet cavity and the bottom of the water inlet cavity are connected to each other. The top of the water outlet cavity is connected to the interior of the second winding part 31. The first water inlet 23 is connected to the water inlet cavity, and the first water outlet 24 is connected to the water outlet cavity.

[0045] The partition plate divides the first encapsulation section 21 into an inlet chamber and an outlet chamber. After the coolant enters the inlet chamber through the first inlet 23, it can only flow along a specific path, avoiding disorderly diffusion and turbulence within the first encapsulation section 21. The coolant flows stably within the first inlet chamber, fully absorbing heat, and then flows from the bottom into the first outlet chamber, before entering the second winding section 31 through the top, forming an orderly and efficient coolant circulation channel. This effectively prevents the coolant from flowing only from the first inlet 23 to the first outlet 24.

[0046] An orderly flow path ensures that the coolant can uniformly contact the inner liner tube 1 enclosed by the first wrapping part 21, avoiding local overheating or insufficient cooling. During the copper rod drawing process, uniform cooling helps the copper rod form a uniform microstructure, reduces the generation of internal stress and defects, and improves the quality and performance stability of the copper rod.

[0047] The first winding portion 22 and the second winding portion 31 are arranged in the same spiral direction.

[0048] The first winding portion 22 and the second winding portion 31 are arranged in the same spiral direction, so that the first winding portion 22 and the second winding portion 31 can better fit tightly against the surface of the inner liner tube 1, reducing the gap between the first winding portion 22 and the inner liner tube 1, and between the second winding portion 31 and the inner liner tube 1, thereby improving the heat conduction efficiency, enabling the coolant to absorb the heat transferred by the inner liner tube 1 more effectively, accelerating the cooling speed of the copper rod, ensuring a uniform temperature gradient of the copper rod during the crystallization process, and facilitating the formation of a high-quality copper rod microstructure.

[0049] The bottom of the inner liner tube 1 is provided with a sealing plate 10, and the side wall of the inner liner tube 1 is provided with a plurality of liquid passage holes 11, which penetrate the side wall of the inner liner tube 1.

[0050] By installing a sealing plate 10 at the bottom of the graphite mold, the path of molten copper from the end into the inner liner tube 1 is blocked, forcing the molten copper to flow in only through the side wall liquid passage hole 11. At this time, the sealing plate 10 and the liquid passage hole 11 work together to prevent large particles of impurities with a diameter larger than the diameter of the liquid passage hole 11 from entering the inner liner tube 1, significantly improving the purity and internal quality of the copper rod.

[0051] The molten copper is dispersed into the inner liner tube 1 through multiple annular liquid passages 11, forming a relatively stable flow state within the inner liner tube 1. This ensures that the molten copper is uniformly heated and cooled within the inner liner tube 1, enabling the copper rod to form a uniform microstructure during the crystallization process.

[0052] The liquid passage 11 slopes from the outside inwards towards the bottom.

[0053] The liquid passage hole 11 slopes from the outside to the bottom. During the process of drawing the copper rod upward, the copper liquid can flow more smoothly into the inner liner tube 1 through the liquid passage hole 11 under the combined action of its own gravity and the pressure inside the furnace, reducing the retention and accumulation of copper liquid at the liquid passage hole 11 and reducing the possibility of blockage.

[0054] In addition, the inclined liquid passage 11 makes it easier for impurities to be flushed away by the flow of copper liquid, avoiding the accumulation of impurities in the hole, ensuring the smooth flow of liquid passage 11, and ensuring that copper liquid can flow into the inner liner tube 1 continuously and stably.

[0055] The cooling pipe is made of copper alloy or oxygen-free copper.

[0056] Both copper alloys and oxygen-free copper have extremely high thermal conductivity. During the copper rod drawing process, the inner liner tube 1 absorbs a large amount of heat from the molten copper. The cooling pipe, which is tightly wrapped around or close to the inner liner tube 1, can quickly absorb this heat, effectively reducing the temperature of the molten copper and the inner liner tube 1, and accelerating the crystallization rate of the copper rod.

[0057] The inner liner tube 1 includes a graphite tube and a copper tube, with multiple graphite tubes spliced ​​together and disposed on the inner wall of the copper tube.

[0058] Because the inner structure of the inner liner tube 1 is composed of multiple graphite tubes spliced ​​together, when a graphite tube is damaged, it can be replaced individually without replacing the entire inner liner tube, thus reducing maintenance costs and time. The copper tube, as the outer structure, provides solid mechanical support for the graphite tubes, effectively enhancing the structural strength of the entire inner liner tube 1 and preventing the graphite tubes from deforming or breaking under stress.

[0059] Furthermore, copper tubes themselves have excellent thermal conductivity, enabling them to work in conjunction with graphite tubes for more efficient heat transfer. During the upward drawing process of the copper rod, the heat released by the molten copper is rapidly transferred to the cooling system through the graphite and copper tubes, ensuring that the molten copper can cool and solidify quickly.

[0060] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A graphite-lined crystallization apparatus for a copper rod-driven furnace, characterized in that, Includes inner liner tubes, cooling pipes, and protective sleeves; The cooling pipe is fixedly sleeved on the outside of the inner liner tube. The cooling pipe includes a bottom cooling zone, a middle cooling zone and a top cooling zone from bottom to top. The bottom cooling zone cools the bottom of the inner liner tube through a cooling water channel. The top cooling zone cools the top of the inner liner tube through a cooling water channel. The middle cooling zone cools the middle of the inner liner tube through two intertwined cooling water channels. The bottom of the protective sleeve passes through the inner liner tube and is fixedly fitted onto the outside of the bottom cooling zone.

2. The graphite-lined crystallization apparatus for a copper rod upward-drawing furnace according to claim 1, characterized in that, The cooling pipe includes a first wrapping part, a first winding part, a second winding part, and a second wrapping part. The first wrapping part wraps around the bottom of the inner liner pipe to form a bottom cooling zone. A first water inlet is provided at the top of the first wrapping part. The first wrapping part and the first winding part are interconnected. A first water outlet is provided at the end of the first winding part. The second wrapping part wraps around the bottom of the inner liner tube to form a top cooling zone. The top of the second wrapping part is provided with a second water outlet. The second winding part and the second wrapping part are connected to each other. The end of the second winding part is provided with a second water inlet. The first winding portion and the second winding portion together wrap around the middle part of the inner liner tube to form a central cooling zone.

3. The graphite-lined crystallization apparatus for a copper rod upward-drawing furnace according to claim 2, characterized in that, The first wrapping part is provided with a first partition plate inside. Two first partition plates are arranged opposite each other and vertically divide the interior of the first wrapping part to form a water inlet cavity and a water outlet cavity. The bottom of the water outlet cavity and the bottom of the water inlet cavity are connected to each other. The top of the water outlet cavity is connected to the interior of the second winding part. The first water inlet is connected to the water inlet cavity, and the first water outlet is connected to the water outlet cavity.

4. The graphite-lined crystallization apparatus for a copper rod upward-drawing furnace according to claim 3, characterized in that, The first winding portion and the second winding portion are arranged in the same spiral direction.

5. The graphite-lined crystallization apparatus for a copper rod upward-drawing furnace according to claim 4, characterized in that, The bottom of the inner liner is provided with a sealing plate, and the side wall of the inner liner is provided with a plurality of liquid passage holes, which penetrate the side wall of the inner liner.

6. The graphite-lined crystallization apparatus for a copper rod upward-drawing furnace according to claim 5, characterized in that, The liquid passage is inclined from the outside to the bottom.

7. The graphite-lined crystallization apparatus for a copper rod upward-drawing furnace according to claim 1, characterized in that, The cooling pipe is made of copper alloy or oxygen-free copper.

8. The graphite-lined crystallization apparatus for a copper rod upward-drawing furnace according to claim 4, characterized in that, The inner lining tube includes a graphite tube and a copper tube, with multiple graphite tubes spliced ​​together and disposed on the inner wall of the copper tube.

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