High-temperature copper slag treatment system and slag ladle cover device thereof

Abstract

This invention discloses a high-temperature copper slag treatment system and its slag covering device. The slag covering device includes a slag cover, a water-cooled wall, and a heat pipe assembly. The slag cover is a hollow structure with openings at the top and bottom. The water-cooled wall is fixedly installed on the inner wall of the slag cover, and the slag cover has an inlet and an outlet communicating with the water-cooled wall. The heat pipe assembly is installed inside the slag cover, and the heat pipe assembly includes heat pipes. The evaporation section of the heat pipe is located near the lower end of the slag cover, and the condensation section of the heat pipe is located near the upper end of the slag cover. Using this solution, after the slag cover device covers the slag, cooling air can be delivered to the working position of the slag through the inlet air duct. Simultaneously, during the flow of cooling water within the water-cooled wall, heat from the high-temperature copper slag on the surface of the slag is absorbed through radiation heat transfer, and the heat from the copper slag inside the slag is discharged through the heat pipes inserted in the slag. Overall, waste heat recovery is achieved through both water-cooled radiation heat exchange and air-cooled convection heat exchange, resulting in a high heat recovery rate.

Description

Technical Field

[0001] This invention relates to the field of metallurgical copper slag treatment and waste heat recovery technology, specifically to a high-temperature copper slag treatment system and its slag covering device. Background Technology

[0002] With the development of the copper smelting industry and the growth in copper demand, the amount of copper slag, a byproduct of the smelting process, is increasing year by year. Copper slag discharges from the smelting furnace at a temperature of approximately 1200℃~1300℃, representing a high-grade waste heat resource with significant recovery value. Current copper slag treatment processes primarily employ slow cooling in slag bags to allow the slag to form better crystals during cooling, facilitating better copper recovery in subsequent ore beneficiation processes. However, this approach sacrifices waste heat recovery.

[0003] A typical method for heat recovery of copper slag in a slag bag primarily involves recovering the heat energy dissipated from the surface of the copper slag into the surrounding air. After being loaded into the slag bag at high temperatures, the molten copper slag is sent to a slow cooling zone for natural cooling over a period of time, reducing its temperature to below 1000℃ to ensure the formation of the largest possible copper mineral crystals. Then, circulating cooling water is added for water cooling. This water, heated by the high-temperature copper slag, vaporizes into steam, and the heat from the steam is collected by a heat exchanger located above the slag bag, thus recovering the heat from the copper slag. However, after a series of heat transfer processes, the effective heat recovery is relatively low.

[0004] In view of this, there is an urgent need to propose an effective solution for the high-temperature copper slag treatment process and to effectively recover the waste heat of the copper slag. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a high-temperature copper slag treatment system and its slag covering device, which can effectively recover the waste heat from the copper slag.

[0006] The slag covering device provided by the present invention includes a slag covering, a water-cooled wall, and a heat pipe assembly; the slag covering is a hollow structure with openings at the top and bottom; the water-cooled wall is fixedly disposed on the inner wall of the slag covering, and the slag covering has an inlet and an outlet communicating with the water-cooled wall; the heat pipe assembly is disposed inside the slag covering, the heat pipe assembly includes heat pipes, the evaporation section of the heat pipes is disposed near the lower end of the slag covering, and the condensation section of the heat pipes is disposed near the upper end of the slag covering.

[0007] Optionally, the heat pipe assembly further includes a protective sleeve with an opening at its upper end, and at least the evaporation section of the heat pipe is inserted into the protective sleeve.

[0008] Optionally, the heat pipe assembly is rotatably disposed within the slag cover.

[0009] Optionally, the heat pipe assembly may rotate about the axis of its heat pipe relative to the slag shroud, or may rotate about the center of the slag shroud.

[0010] Optionally, the outer surface of the protective sleeve is provided with a turbulence structure.

[0011] Optionally, the outer surface of the protective sleeve is provided with raised strips, and the turbulence structure is formed by the raised strips.

[0012] Optionally, the protective sleeve is a spiral flat tube, and a turbulence structure is formed on the outer surface of the spiral flat tube.

[0013] Optionally, the water-cooled wall includes a lower header, a plurality of water-cooled wall tubes, and an upper header, each of the water-cooled wall tubes being connected to the lower header and the upper header respectively; the lower header is connected to the inlet, and the upper header is connected to the outlet.

[0014] Optionally, it also includes an air outlet pipe, wherein the lower end of the slag cover has a flared opening and the upper end of the slag cover has a constricted opening, the air outlet pipe is connected to the constricted opening at the upper end of the slag cover, and the air outlet pipe extends vertically.

[0015] The high-temperature copper slag treatment system provided by this invention includes a slag cover device, a waste heat recovery tower, an inlet air duct, an outlet air duct, a cooling water header, and a steam-water header as described above. A heat recovery unit and a fan are installed inside the waste heat recovery tower. The upper end of the waste heat recovery tower is connected to the air outlet side of the slag cover device through the outlet air duct, and the lower end of the waste heat recovery tower is connected to the slag cover working position through the inlet air duct. The cooling water header and the steam-water header are connected to the inlet and outlet of the slag cover, respectively, to establish a circulating water flow path.

[0016] Optionally, it also includes a lifting device, which is connected to the slag cover device and pulls the slag cover device to lift and lower; the cooling water header is connected to the inlet through a first connecting pipe, and the steam-water header is connected to the outlet through a second connecting pipe, wherein both the first connecting pipe and the second connecting pipe are configured such that at least part of the pipe body is a flexible pipe.

[0017] Optionally, it also includes a fixedly installed air outlet sleeve, which is connected to the outlet air duct. The upper end of the air outlet pipe of the slag covering device extends into the air outlet sleeve and can slide vertically relative to the air outlet sleeve.

[0018] Optionally, a guide rail assembly is provided between the air outlet pipe and the air outlet pipe sleeve to achieve limiting and guiding.

[0019] Optionally, it also includes a drive device that drives the heat pipe assembly to rotate.

[0020] Optionally, it also includes a heat pipe cooling duct, one end of which is connected to the outlet duct of the fan, and the other end of which is connected to the slag cover next to the condensation section, and the heat pipe cooling duct includes a flexible pipe section.

[0021] Optionally, the heat pipe cooling duct further includes a rigid pipe section connected to the flexible pipe section, and the rigid pipe section is fixedly installed on the slag cover and connected to the inside of the slag cover, while the flexible pipe section is connected to the outlet duct of the fan.

[0022] Optionally, an airflow regulating valve is provided on the heat pipe cooling duct.

[0023] Optionally, it also includes a control device, a first thermometer, and a second thermometer. The first thermometer is respectively provided on the side and top of the slag cover, and the second thermometer is provided inside the protective sleeve of the heat pipe assembly of the slag cover device. The temperature data detected by the first thermometer and the second thermometer are sent to the control device.

[0024] Optionally, multiple slag covering devices are provided, and the multiple slag covering devices are arranged sequentially and at intervals around the outer periphery of the waste heat recovery tower, or the multiple slag covering devices are arranged in an array on the side of the waste heat recovery tower.

[0025] To address the waste heat recovery from high-temperature copper slag, this solution proposes a novel multi-effect energy-saving system for high-temperature copper slag treatment. Specifically, the slag covering device includes a slag covering, a water-cooled wall, and a heat pipe assembly. The slag covering is a hollow structure with openings at the top and bottom, allowing cooling air to pass through for convective heat exchange. The water-cooled wall is fixedly installed on the inner wall of the slag covering, and the slag covering has inlets and outlets communicating with the water-cooled wall for cooling water to pass through for radiative heat exchange. The heat pipe assembly is installed inside the slag covering, with the evaporation section of the heat pipe located near the lower end of the slag covering and the condensation section located near the upper end of the slag covering. With this configuration, once the slag bag cover is installed, a nearly sealed space is formed inside the cover. Cooling air can be delivered to the working position of the slag bag through the inlet duct, entering the space between the outer surface of the slag bag and the inner surface of the cover to form an air supply path. Simultaneously, cooling water enters the water-cooled wall through the inlet. During its flow within the water-cooled wall, the cooling water absorbs heat from the high-temperature copper slag on the surface of the slag bag primarily through radiative heat transfer, ultimately becoming a steam-water mixture that flows out through the outlet. Furthermore, after the slag bag cover is installed outside the slag bag, the heat pipe evaporation section of the heat pipe assembly can be inserted inside the slag bag. The working fluid inside the heat pipe absorbs heat from the copper slag through radiative heat transfer, undergoes a phase change after heat absorption, and rises to the condensation section, where it exchanges heat with the external cooling air. The high thermal conductivity of the high-temperature heat pipe effectively conducts heat from the copper slag inside the slag bag. Overall, waste heat recovery is achieved through both water-cooled radiative heat transfer and air-cooled convection heat transfer, providing comprehensive heat recovery from the copper slag with a high heat recovery rate and good economic benefits.

[0026] In addition, the heat pipe structure is used to recover the heat of the copper slag in the middle of the slag bag, which has a high heat exchange efficiency and can effectively avoid the risk of heat exchange medium coming into contact with high temperature copper slag due to heat exchanger leakage.

[0027] In an optional embodiment of the present invention, the heat pipe assembly further includes a protective sleeve, the upper end of which is open, and at least the evaporation section of the heat pipe is inserted into the protective sleeve. Thus, based on the protective function of the protective sleeve, direct contact between the heat pipe and high-temperature copper slag can be avoided, preventing the formation of slag on the surface of the heat pipe, thereby ensuring the heat exchange efficiency of the heat pipe.

[0028] In another alternative embodiment of the invention, the heat pipe assembly is rotatably disposed within the slag bag cover. With this configuration, after the slag bag cover is installed outside the slag bag, the heat pipe assembly can be driven to rotate slowly, for example, but not limited to, rotating relative to the slag bag cover around the axis of its heat pipes, or rotating around the center of the slag bag cover. This rotation, or agitation within a certain range, provides orderly and directional stirring of the high-temperature liquid copper slag. This results in more uniform heat dissipation from the copper slag and promotes copper crystallization. Compared to allowing the slag bag to stand still in a natural environment to achieve copper crystallization, this method achieves better crystallization results, providing a technical guarantee for improving the copper recovery efficiency in subsequent copper flotation processes.

[0029] In another alternative embodiment of the present invention, multiple slag covering devices are arranged sequentially and at intervals around the outer periphery of the waste heat recovery tower, or multiple slag covering devices are arranged in an array on the side of the waste heat recovery tower; in this way, based on the configuration of the waste heat recovery tower, a compact high-temperature copper slag treatment island is formed, and waste heat recovery of high-temperature copper slag can be efficiently achieved with a small footprint. Attached Figure Description

[0030] Figure 1 This is a schematic elevation view of a high-temperature copper slag treatment system provided in an embodiment of this application;

[0031] Figure 2 A schematic diagram of a slag cover provided in an embodiment of this application;

[0032] Figure 3 This is a schematic diagram of the structure of a heat pipe assembly provided in an embodiment of this application;

[0033] Figure 4 for Figure 1 Enlarged view of part F in the image;

[0034] Figure 5 A schematic diagram illustrating the principle of a driving device driving a heat pipe assembly, provided in an embodiment of this application;

[0035] Figure 6 for Figure 5 DD sectional view;

[0036] Figure 7 A schematic diagram illustrating the principle of another driving device for driving a heat pipe assembly provided in an embodiment of this application;

[0037] Figure 8 for Figure 7 EE section view;

[0038] Figure 9 A schematic diagram of a protective sleeve provided for an embodiment of this application;

[0039] Figure 10 A schematic diagram of another protective sleeve provided in an embodiment of this application;

[0040] Figure 11 This is a schematic diagram of the plan layout of a high-temperature copper slag treatment system provided in an embodiment of this application;

[0041] Figure 12 This is a schematic diagram of the plan layout of another high-temperature copper slag treatment system provided in an embodiment of this application.

[0042] In the picture:

[0043] Slag cover device 10, slag cover 1, flared end 11, narrowed end 12, water-cooled wall 2, lower header 21, water-cooled wall tube 22, upper header 23, heat pipe assembly 3, heat pipe 31, evaporation section 311, condensation section 312, extended heat exchange structure 3121, protective sleeve 32, protective sleeve 32a, protrusion 321a, protective sleeve 32b, air outlet pipe 4;

[0044] Lifting device 20, waste heat recovery tower 30, heat recovery unit 301, fan 302, inlet air duct 40, pipe port 401, outlet air duct 50, cooling water header 60, first connecting pipe 61, steam and water header 70, second connecting pipe 71, drive device 80, air outlet sleeve 90, guide rail assembly 91, slag bag 100, heat pipe cooling air duct 110, rigid pipe section 1101, flexible pipe section 1102, air volume regulating valve 1103, control device 120, positioning device 130, first thermometer 1401, second thermometer 1402. Detailed Implementation

[0045] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] Please see Figure 1 The figure is a schematic diagram of a high-temperature copper slag treatment system provided in an embodiment of this application. Figure 1 This is a schematic elevation view of the high-temperature copper slag treatment system.

[0047] The high-temperature copper slag treatment system includes a slag cover device 10, a lifting device 20, a waste heat recovery tower 30, an inlet air duct 40, an outlet air duct 50, a cooling water header 60, and a steam-water header 70. The slag cover device 10 can be installed on the outside of the slag bag 100 and recovers waste heat through both water-cooled radiative heat exchange and air-cooled convective heat exchange. On the one hand, a circulating water flow path can be established based on the cooling water header 60 and the steam-water header 70 to recover the heat obtained from water-cooled radiative heat exchange; on the other hand, a circulating air flow path can be established based on the inlet air duct 40 and the outlet air duct 50 to recover the heat obtained from air-cooled convective heat exchange.

[0048] The waste heat recovery tower 30 is a hollow cylindrical structure with an inner cavity, in which a heat recovery unit 301 and a fan 302 are integrated. The heat recovery unit 301 is located above the fan 302, and heat recovery and utilization are achieved through heat exchange based on the heat recovery unit 301. In a possible implementation, the fan 302 can also be located below the heat recovery unit 301, as long as a good air-cooling circulation can be established.

[0049] In this embodiment, the upper end of the waste heat recovery tower 30 is connected to the air outlet side of the slag bag cover device 10 through the outlet air duct 50, and the lower end of the waste heat recovery tower 30 is connected to the slag bag working position A through the inlet air duct 40. Here, "slag bag working position" refers to the location where the slag bag to be recovered is set. When the slag bag cover device 10 covers the slag bag 100, a nearly sealed space is formed inside the slag bag cover. Cooling air can be delivered to the slag bag working position A through the inlet air duct 40 to enter the space between the outer surface of the slag bag and the inner surface of the slag bag cover. It should be understood that the slag bag working position A is also the location area where the slag bag is set, so that the cooling air is sent into the slag bag cover to form an air supply path.

[0050] For ease of description, Figure 1 Taking two slag bag working positions A as an example, at the right slag bag working position A, the slag bag cover device 10 is located in a preparatory position above the slag bag 100, and at the left slag bag working position A, the slag bag cover device 10 is installed on the outside of the slag bag 100. After the cooling air enters the slag bag cover, it flows upward and absorbs the heat of the high-temperature copper slag inside the slag bag 100 through convection heat exchange; then, it flows out from the air outlet pipe 4 at the top of the slag bag cover, flows back to the waste heat recovery tower 30 through the outlet air duct 50, is cooled by the heat recovery unit 301, and reaches the inlet of the fan 302, and this cycle continues.

[0051] To improve the convective heat transfer efficiency of the cooling air, the inlet air duct 40 may optionally be split through multiple ports 401 so that the cooling air reaching the working position A of the slag bag can be evenly delivered to the outer periphery of the slag bag 100.

[0052] Please include Figure 2 The figure is a schematic diagram of a slag cover provided in an embodiment of this application.

[0053] In this embodiment, the slag covering device 10 includes a slag covering 1, a water-cooled wall 2, and a heat pipe assembly 3. The slag covering 1 is a hollow structure with openings at the top and bottom, having a flared end 11 at the bottom and a constricted end 12 at the top. The constricted end 12 of the slag covering 1 facilitates the collection and recovery of hot air from convective heat transfer.

[0054] The water-cooled wall 2 is fixedly installed on the inner wall of the slag bag cover 1, and the slag bag cover 1 has an inlet B1 and an outlet B2 that communicate with the water-cooled wall 2. Cooling water enters the water-cooled wall 2 through the inlet B1. During the flow inside the water-cooled wall 2, the cooling water mainly absorbs the heat of the high-temperature copper slag on the surface of the slag bag through radiation heat transfer, and finally becomes a steam-water mixture that flows out through the outlet B2.

[0055] In this embodiment, the water-cooled wall 2 includes a lower header 21, several water-cooled wall tubes 22, and an upper header 23. Each water-cooled wall tube 22 is connected to both the lower header 21 and the upper header 23. The inlet B1 is connected to the lower header 21 of the water-cooled wall 2, and the outlet B2 is connected to the upper header 23. Thus, during the radiative heat exchange process, the cooling water flows from bottom to top within the water-cooled wall tubes 22.

[0056] In practical implementation, the water-cooled wall tubes 22 can be made of pressure-resistant circular tubes and arranged in a circular array inside the slag cover 1, and fixed to the inner wall of the slag cover 1 by the circular lower header 21 and upper header 23. Combined with... Figure 1 As shown, the lower header 21 is connected to the cooling water header 60 via the first connecting pipe 61, and the upper header 23 is connected to the steam-water header 70 via the second connecting pipe 71. During operation, cooling water flows out from the cooling water header 60, enters the lower header 21 via the first connecting pipe 61, and is evenly distributed into each water-cooled wall tube 22. The steam-water mixture formed by heat exchange within the water-cooled wall tubes 22 collects in the upper header 23 and flows to the steam-water header 70 via the second connecting pipe 72. Finally, the steam-water mixture can flow to the steam drum to separate steam and water, achieving high-grade waste heat recovery; alternatively, the steam-water mixture can flow downstream to equipment requiring heat (not shown in the figure) for heating purposes.

[0057] To improve the heat exchange capacity of the water-cooled wall 2, optionally, each water-cooled wall tube 22 can extend upwards and be arranged at the constriction 12 at the upper end of the cover to increase the heat exchange volume. Correspondingly, the heat pipe assembly 3 can be set on the inner wall of the air outlet duct 4 to reasonably control the specific implementation cost of assembling the heat pipe assembly 3.

[0058] In other specific implementations, the water-cooled wall 2 can adopt different structural forms, as long as they facilitate the flow and heat exchange of cooling water. This application does not limit the specific implementation.

[0059] In one possible implementation, the lower header 21 and the upper header 23 can also be connected in reverse within the cold water circulation system. That is, the lower header 21 is connected to the outlet B2, and the upper header 23 is connected to the inlet B1. Comparatively, the connection method shown in the figure has better heat exchange efficiency and facilitates the recovery of the steam-water mixture.

[0060] For example Figure 2 As shown, the upper end of the slag cover 1 is provided with an air outlet pipe 4. The air outlet pipe 4 extends vertically and can be used to collect and recover hot air, while also serving as a guide for vertical displacement.

[0061] For example Figure 1As shown, the high-temperature copper slag treatment system also includes an outlet pipe sleeve 90 fixedly disposed relative to the outlet pipe 4. The outlet pipe sleeve 90 can communicate with the outlet air duct 50. The upper end of the outlet pipe 4 extends into the outlet pipe sleeve 90 and can slide vertically relative to the outlet pipe sleeve 90. Specifically, a guide rail assembly 91 can be used to limit and guide the outlet pipe 4 and the outlet pipe sleeve 90, preventing the slag cover from shaking and shifting during lifting and lowering. The guide rail assembly 91 can adopt different structural forms. In specific implementation, those skilled in the art can use existing technology to implement it, and the embodiments of this application are not limited.

[0062] In addition, the slag covering device 10 can be raised and lowered via the lifting device 20. In this embodiment, the lifting device 20 is a winch mechanism installed above the air outlet pipe 4, which can pull the air outlet pipe 4 to achieve the raising and lowering operation of the slag covering device 10. Based on the raising and lowering function of the slag covering device 10, the first connecting pipe 61 and the second connecting pipe 71 can be flexible hoses, or a portion of the pipe sections can be flexible hoses, to accommodate the raising and lowering of the slag covering device 10.

[0063] In other possible implementations, the lifting device 20 can adopt different structural forms. For example, it can be driven by a motor-driven gear transmission mechanism to lift the slag cover. Or, it can be driven by a motor-driven chain transmission mechanism to lift the slag cover.

[0064] In this embodiment, the heat pipe assembly 3 is housed inside the slag cover 1; please refer to [reference needed]. Figure 3 This figure is a schematic diagram of a heat pipe assembly provided in an embodiment of this application. The heat pipe assembly 3 includes a heat pipe 31 and a protective sleeve 32. The opening of the protective sleeve 32 is located at the upper end, and the heat pipe 31 is inserted through the upper opening of the protective sleeve 32; that is, the protective sleeve 32 is fitted over the heat pipe 31 from the bottom. The evaporation section 311 of the heat pipe 31 is positioned relative to the condensation section 312 near the lower end of the slag cover 1, and the condensation section 312 of the heat pipe 31 is positioned relative to the evaporation section 311 near the upper end of the slag cover 1. The specific configuration of the heat pipe 31 and its internal working fluid can be implemented using existing technology, and will not be described in detail here.

[0065] During operation, after the slag cover device 10 is installed on the outside of the slag bag 100, the evaporation section 311 of the heat pipe assembly 3 can be inserted into the slag bag 100. The working fluid inside the heat pipe 31 absorbs heat from the copper slag through radiative heat transfer. After absorbing heat and undergoing a phase change, it forms a gaseous working fluid that rises to the condensation section 312, where it exchanges heat with the external cooling air. The high thermal conductivity of the high-temperature heat pipe 31 effectively conducts the heat from the copper slag inside the slag bag. At the same time, the heat pipe assembly 3 rises and falls synchronously with the slag cover device 10, enabling automated lifting and lowering operations.

[0066] The protective sleeve 32 prevents direct contact between the heat pipe 31 and the high-temperature copper slag, thus avoiding the formation of slag on the heat pipe surface and ensuring the heat exchange efficiency of the heat pipe 31. In specific implementations, the protective sleeve 32 and the heat pipe 31 can be detachably connected, for example, but not limited to, by threaded or flanged connections, to facilitate maintenance and replacement of the protective sleeve 32 and improve the overall service life of the equipment. In other possible implementations, the protective sleeve 32 can be selectively configured, meaning that the heat pipe 31 can directly contact the high-temperature copper slag for heat exchange.

[0067] Furthermore, in order to enhance the heat exchange performance of the condensing section of the heat pipe 31, an extended heat exchange structure 3121 can be provided on the outside of the condensing section 312 tube body, for example, but not limited to, using fins or pins to extend the heat transfer surface structure, so as to increase its heat exchange area.

[0068] In a specific implementation, the protective cover 32 is at least fitted onto the outside of the evaporation section 311. Figure 3 The protective sleeve 32 shown contains a heat pipe 31. In other implementations, multiple heat pipes 31 can be placed inside the protective sleeve 32 depending on the heat exchange performance requirements. This application does not limit the scope of the embodiments.

[0069] To ensure the heat exchange efficiency of the condenser section of heat pipe 31, optionally, a cold air stream can be drawn from the outlet side of fan 302. Please refer to [further details]. Figure 1 and Figure 4 ,in, Figure 4 for Figure 1 Enlarged view of part F in the image.

[0070] For example Figure 1 As shown, the heat pipe cooling duct 110 is located between the outlet of the fan 302 and the side of the condenser section 312 of the heat pipe 31, and performs jet heat exchange on the condenser section 312 of the heat pipe 31. The heat pipe cooling duct 110 includes a rigid pipe section 1101 and a flexible pipe section 1102 connected together, as shown... Figure 4 As shown, the rigid pipe section 1101 of the heat pipe cooling duct 110 is fixedly installed on the slag covering device 10 and rises and falls synchronously with the slag covering device 10. Correspondingly, the heat pipe cooling duct 110 is connected to the outlet duct of the fan 302 through the flexible pipe section 1102 to adapt to the rising and falling movement of the rigid pipe section 1101 with the slag covering device 10.

[0071] Optionally, an airflow regulating valve 1103 is installed on the heat pipe cooling duct 110. In this way, the heat exchange effect of the heat pipe can be adaptively adjusted by regulating the airflow, thereby achieving overall control of the cooling rate of the copper slag.

[0072] It should be noted that the above-mentioned jet heat exchange for the condenser section 312 of heat pipe 31 can also be replaced by other refrigerants such as cooling water in other possible implementations, rather than being limited to cooling air.

[0073] In practical applications, depending on the actual usage requirements of the application scenario, different numbers of heat pipe assemblies 3 can be set in the central area of ​​the slag bag. This application embodiment does not limit this.

[0074] Typically, copper particles in high-temperature molten copper slag can migrate and aggregate, undergoing plastic growth—that is, copper crystallization—driven by surface tension. To promote the ordered crystallization and growth of copper and other phases, the heat pipe assembly 3 can optionally be movably connected to the slag cover 1, and... Figure 1 The drive device 80 shown rotates. In this way, the high-temperature liquid copper slag can be directionally and orderly stirred by the heat pipe assembly 3. Compared with the slag bag being left to stand in the natural environment to achieve copper crystallization, a better crystallization effect can be obtained, which provides technical support for improving the copper recovery efficiency in the subsequent copper flotation process.

[0075] Here, under the drive of the drive device 80, the rotation of the heat pipe assembly 3 can be either a rotation of the heat pipe axis or a rotation around the center of the slag bag 100, that is, a rotation around the center of the slag bag cover 1; in addition, it can also be a rotation around the heat pipe axis while simultaneously rotating around the center of the slag bag 100.

[0076] Please see Figure 5 and Figure 6 ,in, Figure 5 This is a schematic diagram illustrating the principle of a driving device driving a heat pipe assembly, provided in an embodiment of this application. Figure 6 for Figure 5 A DD cross-sectional view. This is to clearly illustrate the principle of how the heat pipe assembly stirs the copper slag. Figure 5 The simplified diagram illustrates the specific transmission relationship between the drive unit and the heat pipe assembly.

[0077] like Figure 5 and Figure 6 As shown, the heat pipe assembly 3 is eccentrically positioned relative to the center of the slag bag 100. Under the action of the drive device 80, the heat pipe assembly 3 can rotate around the heat pipe axis in the direction indicated by arrow r1, and simultaneously rotate around the center of the slag bag 100 in the direction indicated by arrow r2. In a specific implementation, the heat pipe assembly 3 can rotate at a low speed, such as, but not limited to, 2–4 rpm (Revolutions Per Minute), and low-speed stirring is beneficial for copper crystallization.

[0078] Please see Figure 7 and Figure 8 ,in, Figure 7 This is a schematic diagram illustrating the principle of another driving device for driving a heat pipe assembly according to an embodiment of this application. Figure 8 for Figure 7 The EE cross-sectional view in the image is shown to clearly illustrate the principle of the heat pipe assembly stirring the copper slag. Figure 7 The simplified diagram illustrates the specific transmission relationship between the drive unit and the heat pipe assembly. Furthermore, to clearly show the differences and connections between this implementation and the aforementioned solutions, components or structures with the same function are indicated by the same reference numerals in the diagram.

[0079] like Figure 7 and Figure 8 As shown, multiple heat pipe assemblies 3 are circumferentially spaced relative to the center of the slag bag 100. Under the action of the driving device 80, each heat pipe assembly 3 can rotate around the heat pipe axis in the direction indicated by arrow r1. Each heat pipe assembly 3 can rotate simultaneously at a low speed, for example, but not limited to, 2-4 rpm. In specific implementations, depending on the spatial configuration requirements of the application scenario, the driving device 80 can use different transmission mechanisms to drive the rotation of each heat pipe assembly 3, for example, but not limited to, through... Figure 8 The gear mechanism shown transmits power to each heat pipe assembly 3.

[0080] In other possible implementations, a heat pipe assembly 3 (not shown in the figure) can be set approximately concentrically with respect to the center of the slag bag 100, which can also achieve copper slag stirring.

[0081] To further enhance the directional disturbance effect on the high-temperature liquid slag, optionally, a turbulence structure can be provided on the outer surface of the protective sleeve 32 of the heat pipe assembly 3.

[0082] Please see Figure 9 This figure is a schematic diagram of a protective cover provided in an embodiment of this application.

[0083] like Figure 9 As shown, the protective sleeve 32a can be a rotating body, and four vertically arranged protrusions 321a are provided on the outer surface of the protective sleeve 32a. As a turbulence-disrupting structure, each protrusion 321a is arranged circumferentially at intervals on the outer surface of the protective sleeve 32a. In this way, the agitation effect of high-temperature copper slag can be increased during rotation, and the influence of slag formation can be reduced; at the same time, the protrusions 321a can also further improve the heat transfer effect.

[0084] In other specific implementations, the ridge 321a can be set to one or more.

[0085] Please see Figure 10 This figure is a schematic diagram of another protective cover provided in an embodiment of this application.

[0086] like Figure 10As shown, the protective sleeve 32b is a spiral flat tube, and the streamlined spiral outer surface of the flat tube forms a turbulence structure. Similarly, it can further improve the heat transfer effect while reducing the impact of slagging.

[0087] For example Figure 1 As shown, the high-temperature copper slag treatment system provided in this embodiment of the application also includes a control device 120 for precise positioning of the slag bag 100 and monitoring the cooling temperature of the copper slag inside the slag bag 100. Furthermore, based on this control device 120, the various components of the control system can be coordinated according to a control strategy to meet the treatment requirements for high-temperature copper slag waste heat recovery.

[0088] For precise positioning of the slag bag 100, a positioning device 130 is installed at the slag bag working position A. Correspondingly, a monitoring device (not shown in the figure) is installed on the slag bag 100. Based on this monitoring device, the operator can observe the positioning position of the slag bag through the monitoring system. When the slag bag 100 is transported to the slag bag working position A by the slag bag car, if the positional error of the slag bag 100 at the slag bag working position A is within the threshold range (e.g., not greater than 5cm), the positioning device 130 will send a signal to prompt the operator that the slag bag 100 has been accurately positioned.

[0089] For monitoring the cooling temperature of copper slag within 100 mm of the slag bag, such as... Figure 1 As shown, a first temperature measuring instrument 1401 can be installed on the side and top of the slag cover 1, respectively. Figure 3 As shown, a second temperature measuring instrument 1402 can be installed inside the protective sleeve 32. With this configuration, the temperature of the copper slag on the side, top, and center of the slag bag 100 can be detected separately, and the data can be sent to the control device 120 in real time.

[0090] In its implementation, the control device 120 can output control commands to the control terminal of the system, which consists of the fan 302, the air volume regulating valve 1103, and / or the drive device 80, based on the detected copper slag temperature. Through the coordinated control of the operating status of each component of the high-temperature copper slag treatment system, the system meets the requirements for high-temperature copper slag waste heat recovery. The specific control strategy and parameter thresholds can be determined according to the overall requirements of the actual project, and will not be elaborated further here.

[0091] The high-temperature copper slag treatment system provided in this application provides a treatment process for high-temperature copper slag in a slag bag that is divided into two stages: slow cooling and rapid cooling.

[0092] During the slow cooling stage, firstly, the slag bag 100, loaded with high-temperature copper slag, is transported by the slag bag car to the vicinity of slag bag working position A. Guided by the positioning device 130, the slag bag 100 is accurately placed on slag bag working position A. Next, the slag bag cover device 10 is slowly lowered under the traction of the lifting device 20 until it completely covers the slag bag 100. At this time, the evaporation section 311 of the heat pipe assembly 3 has been inserted into the high-temperature copper slag as the slag bag cover 1 descends. Then, the drive device 80 is activated to drive the heat pipe assembly 3 to rotate, stirring within a certain range to orderly and directionally agitate the high-temperature liquid copper slag.

[0093] In practice, the duration of the slow cooling stage is automatically controlled by the control device 120 based on the temperature of the copper slag.

[0094] During the rapid cooling stage, after the aforementioned slow cooling stage, cooling water and cooling air are simultaneously introduced into the slag bag 1. The cooling water and cooling air form a dual cooling method to cool the copper slag on the surface of the slag bag 100. The heat from the copper slag in the middle of the slag bag 100 is conducted away through the heat pipe assembly 3. Once the copper slag temperature drops to the preset temperature, the water supply and ventilation can be stopped, completing the rapid cooling stage of the slag bag.

[0095] After the slag bag quenching stage is completed, the lifting device 20 slowly lifts the slag bag cover device 10, and then the slag bag car transports the processed slag bag 100 away, completing the waste heat recovery treatment.

[0096] The high-temperature copper slag treatment system provided in this application embodiment can be laid out in an overall manner according to the actual project requirements. Figure 11 and Figure 12 Two layout configurations are shown, in which multiple waste heat recovery towers 30 are arranged around the outer periphery of the waste heat recovery tower 30 to form a compact high-temperature copper slag treatment island, which can efficiently realize the waste heat recovery of high-temperature copper slag with a small footprint.

[0097] Please see Figure 11 The figure is a schematic plan view of a high-temperature copper slag treatment system provided in an embodiment of this application. As shown in the figure, the high-temperature copper slag treatment system includes multiple slag covering devices 10, which are arranged sequentially and at intervals around the outer periphery of the waste heat recovery tower 30. Equipment such as heat recovery unit 301 and fan 302 are integrated and arranged inside the waste heat recovery tower 30.

[0098] Corresponding to each slag bag cover device 10, a slag bag working position can be provided for realizing waste heat recovery treatment. The cooling water header 60 and the steam-water header 70 can be annular and arranged on the outer periphery of the waste heat recovery tower 30 to connect to each slag bag cover device 10. In a specific implementation, the slag bag cart transports the slag bag to each slag bag working position along the transport channel on the outer periphery of the high-temperature copper slag treatment island.

[0099] Please see Figure 12This figure is a schematic plan view of another high-temperature copper slag treatment system provided in an embodiment of this application. As shown in the figure, the high-temperature copper slag treatment system includes multiple slag covering devices 10, arranged in an array on both sides of the waste heat recovery tower 30. Similarly, corresponding to each slag covering device 10, a slag covering working position is provided for realizing waste heat recovery treatment.

[0100] Of course, in other possible implementations, each slag covering device 10 can also be arranged in an array on one side of the waste heat recovery tower 30.

[0101] The cooling water header 60 and the steam-water header 70 can be elongated and arranged along the same side of the slag cover device 10 on the side of the waste heat recovery tower 30, so as to connect to each slag cover device 10 respectively. In a specific implementation, the slag bag car transports the slag bags to each slag bag working position along the transport channels on both sides of the high-temperature copper slag processing island.

[0102] It should be noted that the specific functions of the lifting device 20, heat recovery unit 301, and fan 302 can be achieved using existing technologies, so they will not be described in detail here.

[0103] It should be understood that the ordinal numbers "first" and "second" used in this embodiment are only for clarifying the technical composition and relationships, and the use of the above ordinal numbers does not constitute a substantial limitation on the technical solution described in this application.

[0104] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A slag covering device, characterized in that, It includes a slag cover, a water-cooled wall, and a heat pipe assembly; the slag cover is a hollow structure with openings at the top and bottom; The water-cooled wall is fixedly installed on the inner wall of the slag cover, and the slag cover has an inlet and an outlet that communicate with the water-cooled wall. The heat pipe assembly is disposed inside the slag cover. The heat pipe assembly includes a heat pipe, with the evaporation section of the heat pipe disposed near the lower end of the slag cover and the condensation section of the heat pipe disposed near the upper end of the slag cover. The heat pipe assembly is rotatably disposed within the slag cover, and the heat pipe assembly rotates relative to the slag cover about the axis of its heat pipe, or rotates about the center of the slag cover.

2. The slag covering device according to claim 1, characterized in that, The heat pipe assembly also includes a protective sleeve with an opening at its upper end, and at least the evaporation section of the heat pipe is inserted into the protective sleeve.

3. The slag covering device according to claim 2, characterized in that, The outer surface of the protective sleeve is provided with a turbulence structure.

4. The slag covering device according to claim 3, characterized in that, The outer surface of the protective sleeve is provided with raised strips, which form the turbulence structure.

5. The slag covering device according to claim 4, characterized in that, The protective sleeve is a spiral flat tube, and a turbulence structure is formed on the outer surface of the spiral flat tube.

6. The slag covering device according to claim 1, characterized in that, The water-cooled wall includes a lower header, several water-cooled wall tubes, and an upper header. Each water-cooled wall tube is connected to the lower header and the upper header, respectively. The lower header is connected to the inlet, and the upper header is connected to the outlet.

7. The slag covering device according to claim 1 or 2, characterized in that, It also includes an air outlet pipe. The lower end of the slag cover has a flared opening, and the upper end of the slag cover has a constricted opening. The air outlet pipe is connected to the constricted opening at the upper end of the slag cover, and the air outlet pipe extends vertically.

8. A high-temperature copper slag treatment system, characterized in that, The device includes a slag cover device, a waste heat recovery tower, an inlet duct, an outlet duct, a cooling water header, and a steam-water header, as described in any one of claims 1 to 7. The waste heat recovery tower has a heat recovery unit and a fan installed inside its cavity. The upper end of the waste heat recovery tower is connected to the air outlet side of the slag cover device via the outlet duct, and the lower end of the waste heat recovery tower is connected to the slag cover working position via the inlet duct. The cooling water header and the steam-water header are connected to the inlet and outlet of the slag cover, respectively, to establish a circulating water flow path.

9. The high-temperature copper slag treatment system according to claim 8, characterized in that, It also includes a lifting device, which is connected to the slag cover device and pulls the slag cover device to lift and lower; the cooling water main pipe is connected to the inlet through a first connecting pipe, and the steam water main pipe is connected to the outlet through a second connecting pipe. Both the first connecting pipe and the second connecting pipe are configured such that at least part of the pipe body is a flexible pipe.

10. The high-temperature copper slag treatment system according to claim 9, characterized in that, It also includes a fixedly installed air outlet sleeve, which is connected to the outlet air duct. The upper end of the air outlet pipe of the slag covering device extends into the air outlet sleeve and can slide vertically relative to the air outlet sleeve.

11. The high-temperature copper slag treatment system according to claim 10, characterized in that, A guide rail assembly is provided between the air outlet pipe and the air outlet pipe sleeve to achieve limiting and guiding.

12. The high-temperature copper slag treatment system according to any one of claims 9 to 11, characterized in that, It also includes a drive unit that drives the heat pipe assembly to rotate.

13. The high-temperature copper slag treatment system according to any one of claims 9 to 11, characterized in that, It also includes a heat pipe cooling duct, one end of which is connected to the outlet duct of the fan, and the other end of which is connected to the slag cover next to the condensation section, and the heat pipe cooling duct includes a flexible pipe section.

14. The high-temperature copper slag treatment system according to claim 13, characterized in that, The heat pipe cooling duct also includes a rigid pipe section, which is connected to the flexible pipe section. The rigid pipe section is fixedly installed on the slag cover and connected to the inside of the slag cover. The flexible pipe section is connected to the outlet duct of the fan.

15. The high-temperature copper slag treatment system according to claim 13, characterized in that, An airflow regulating valve is installed on the heat pipe cooling duct.

16. The high-temperature copper slag treatment system according to claim 8, characterized in that, It also includes a control device, a first thermometer and a second thermometer. The first thermometer is respectively installed on the side and top of the slag cover, and the second thermometer is installed inside the protective sleeve of the heat pipe assembly of the slag cover device. The temperature data detected by the first thermometer and the second thermometer are sent to the control device.

17. The high-temperature copper slag treatment system according to claim 8, characterized in that, The slag covering device is configured as a plurality of devices, which are arranged sequentially and at intervals around the outer periphery of the waste heat recovery tower, or the plurality of slag covering devices are arranged in an array on the side of the waste heat recovery tower.

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