Copper smelting slag waste heat recovery system

Abstract

The invention provides a copper smelting slag waste heat recovery system, and relates to the technical field of copper smelting. The copper smelting slag waste heat recovery system comprises ceramic microspheres, a waste heat recovery room, a microsphere circulating conveying device, a steam generating device and a heat source material conveying device. The waste heat recovery room is provided with a heat recovery space; the heat source material conveying device comprises a rail and a carrier used for conveying slag ladles of copper smelting slag. The carrier can transport the cinder ladle along the rail to penetrate through the heat recovery space; the microsphere circulating conveying device can control the ceramic microspheres to circulate in the heat recovery space, absorb heat of the cinder ladle penetrating through the heat recovery space and input the recovered heat into the steam generating device. According to the waste heat recovery system, the ceramic microspheres serve as heat transfer media, stable and high-quality steam is generated through the microsphere circulating conveying device, the steam generating device and other devices, efficient recovery of heat can be achieved, and controllable adjustment of the cooling rate can also be achieved.

Description

Technical Field

[0001] The present application relates to the technical field of copper smelting, and in particular to a copper smelting slag waste heat recovery system. Background Art

[0002] Copper smelting is an important part of the global metal industry. Copper slag, as a by-product of the smelting process, not only contains a large amount of waste heat resources, but also contains considerable metal resources. With the continuous advancement of copper smelting technology and the increase in output, the annual output of copper slag is also increasing year by year. The effective use of copper slag can not only reduce energy waste, but also improve the recovery rate of resources, which is of great significance to environmental protection and sustainable utilization of resources.

[0003] At present, the cooling and crystallization process of copper slag is a key link in copper smelting technology. This process is usually divided into two stages: the formation of nodules and the generation and development of grains. The thermal state and viscosity of copper slag play a decisive role in the formation and development of crystal nuclei. In order to obtain coarser copper particles, the cooling rate needs to be precisely controlled. However, existing cooling technologies often fail to effectively control the cooling rate, resulting in fine dispersion of copper phase particles, Fe3O4 forming a dendritic or needle-like structure, copper embedded in it, and difficult to recover by flotation. In addition, the rapid cooling process may also cause the copper slag to form an amorphous structure, which is not conducive to fine grinding. Even if the grinding time is extended, it is difficult to improve the recovery efficiency.

[0004] The defects of the prior art are mainly reflected in the following aspects: First, the control of the cooling rate is not accurate, resulting in fine dispersion of copper phase particles, which is difficult to recover. Second, the rapid cooling process may cause the copper slag to form an amorphous structure, which is not conducive to fine grinding and separation. In addition, too fast a cooling rate will also affect the grindability and beneficiation effect of the copper slag. Finally, the waste heat resources of the copper slag have not been effectively recycled, resulting in a waste of energy.

[0005] In summary, the main defects of the existing copper slag cooling technology are that the cooling rate is not accurately controlled, resulting in fine dispersion of copper phase particles, which are difficult to recover; the rapid cooling process may cause the copper slag to form an amorphous structure, which is not conducive to fine grinding and separation; the cooling rate is too fast and will also affect the grindability and beneficiation effect of the copper slag; and the waste heat resources of the copper slag cannot be effectively recycled, resulting in energy waste. These problems together lead to the waste of copper slag resources and energy loss, and it is urgent to develop new technologies to solve these problems. Summary of the invention

[0006] The purpose of the present application is to provide a copper smelting slag waste heat recovery system, which can not only ensure the temperature drop rate of the copper slag during the slow cooling process, which is helpful for the recovery of copper, but also recycle the heat during the cooling process of the copper slag.

[0007] In order to achieve the above-mentioned object, in a first aspect, the present invention provides a copper smelting slag waste heat recovery system, comprising: ceramic microspheres, a waste heat recovery room, a microsphere circulation conveying device, a steam generating device and a heat source material transporting device;

[0008] The waste heat recovery room is provided with a heat recovery space;

[0009] The heat source material transport device comprises a track and a carrier for transporting a slag bag of copper smelting slag; the carrier can transport the slag bag along the track through the heat recovery space;

[0010] The microball circulation and conveying device can control the ceramic microballs to circulate in the heat recovery space, absorb the heat of the slag bag passing through the heat recovery space, and input the recovered heat into the steam generating device.

[0011] In an optional embodiment, the waste heat recovery room includes a tunnel shell, and a slow cooling section, a high temperature recovery section and a low temperature recovery section sequentially arranged in the tunnel shell.

[0012] In an optional embodiment, the tunnel shell includes a frame structure and an external insulation layer provided on the frame structure, and an entrance insulation door and an exit insulation door provided at both ends of the frame structure in the length direction for the vehicle to enter and leave;

[0013] The thickness of the external insulation layer is at least 300 mm.

[0014] In an optional embodiment, the carrier can carry the slag bag along the track in the heat recovery space of the waste heat recovery room, and pass through the slow cooling section, the high temperature recovery section and the low temperature recovery section in sequence.

[0015] In an optional embodiment, a heat absorption structure is provided in the slow cooling section, the high temperature recovery section and the low temperature recovery section;

[0016] The heat absorbing structure is adapted to the outer shape of the carrier that passes through the heat recovery space and transports the slag ladle of copper smelting slag, so as to receive heat radiation from the upper surface and side walls of the slag ladle.

[0017] In an optional embodiment, the heat absorption structure includes: an upper heat extraction plate provided in the slow cooling section; and a side wall heat absorption plate and an upper heat extraction plate provided in the high temperature recovery section and the low temperature recovery section;

[0018] The upper heat extraction plate is used to absorb the heat radiation from the upper surface of the slag ladle;

[0019] The side wall heat absorbing plate is used to absorb the heat radiation from the side wall of the heat source material transportation device.

[0020] In an optional embodiment, in the high-temperature recovery section and the low-temperature recovery section, the upper heat extraction plate and the side wall heat absorption plate are cross-arranged, and the upper heat extraction plate and the side wall heat absorption plate each independently form a tunnel-shaped structure that can be used for the vehicle to pass through;

[0021] In the high-temperature recovery section and the low-temperature recovery section, the upper heat extraction plate and the side wall heat absorption plate are both provided with a Z-shaped interlayer flow channel for the flow of the ceramic microspheres, and the interlayer flow channels in the upper heat extraction plate and the side wall heat absorption plate are not interconnected;

[0022] The tunnel-shaped structure of the upper heat extractor plate is provided with a surface heat absorbing portion for absorbing the heat radiation from the upper surface of the slag ladle;

[0023] A side wall heat absorbing portion for absorbing heat radiation from the side wall of the heat source material transport device is provided in the tunnel-shaped structure of the side wall heat absorbing plate.

[0024] In an optional embodiment, the microsphere circulation conveying device includes: a scraper conveying device, a lifting device and a microsphere distributor;

[0025] The lifting equipment and the steam generating device are arranged in the middle of the waste heat recovery room and at the junction of the low temperature recovery section and the high temperature recovery section;

[0026] The scraper conveying device is connected to the heat absorbing structure and is capable of receiving the ceramic microspheres flowing out of the heat absorbing structure;

[0027] The scraper conveying device and the lifting device can transfer the ceramic microspheres to the steam generating device through the microsphere distributor.

[0028] In an optional embodiment, the scraper conveyor equipment includes a low-temperature scraper conveyor, a rear medium-temperature scraper conveyor, a front medium-temperature scraper conveyor and a high-temperature scraper conveyor;

[0029] The low-temperature scraper conveyor and the front medium-temperature scraper conveyor are arranged above the heat recovery space of the waste heat recovery room, and are arranged above the carrier for transporting the slag bag, as an upper structure; in the upper structure, the low-temperature scraper conveyor and the front medium-temperature scraper conveyor are both provided with a microball regulating valve;

[0030] The post-medium temperature scraper conveyor and the high temperature scraper conveyor are arranged below the waste heat recovery room as a lower structure;

[0031] The length directions of the low-temperature scraper conveyor, the rear medium-temperature scraper conveyor, the front medium-temperature scraper conveyor and the high-temperature scraper conveyor are parallel to the length direction of the waste heat recovery room;

[0032] In the slow cooling section, the high temperature recovery section and the low temperature recovery section, the side wall heat absorption plate and the upper heat extraction plate can receive the ceramic microspheres flowing downward in the upper structure, and guide the ceramic microspheres to the lower structure through the interlayer flow channel in the heat absorption structure.

[0033] In an optional embodiment, the lifting equipment includes a medium-temperature bucket elevator and a high-temperature bucket elevator;

[0034] The lower end opening of the steam generating device is connected to the low-temperature scraper conveyor, and the ceramic microspheres in the steam generating device can be released into the low-temperature scraper conveyor through the microsphere regulating valve, and transported to an end away from the steam generating device through the low-temperature scraper conveyor;

[0035] The conveying direction of the rear medium-temperature scraper conveyor is opposite to that of the low-temperature scraper conveyor; and the front end of the rear medium-temperature scraper conveyor is connected to the bottom end of the medium-temperature bucket elevator; the rear medium-temperature scraper conveyor can receive the ceramic microspheres flowing out of the low-temperature scraper conveyor through the heat absorption structure, and convey the ceramic microspheres to the bottom end of the medium-temperature bucket elevator;

[0036] A microball metering device is provided at the upper end of the medium-temperature bucket elevator; and the ceramic microballs are released onto the front medium-temperature scraper conveyor through the microball metering device, and are transported to an end away from the medium-temperature bucket elevator through the front medium-temperature scraper conveyor;

[0037] The high-temperature scraper conveyor has a conveying direction opposite to that of the front medium-temperature scraper conveyor; and the rear end of the front medium-temperature scraper conveyor is connected to the bottom end of the high-temperature bucket elevator; the high-temperature scraper conveyor can receive the ceramic microspheres released by the front medium-temperature scraper conveyor based on the microsphere regulating valve and flowing out through the heat absorption structure, and convey the ceramic microspheres toward the bottom end of the high-temperature bucket elevator;

[0038] The microball distributor is provided at the top of the high-temperature bucket elevator, and the high-temperature bucket elevator can lift the ceramic microballs received at the bottom upward, transport them to the microball distributor, and transport them to the upper opening of the steam generating device through the microball distributor.

[0039] Through the above technical scheme, the present invention uses ceramic microspheres as heat transfer medium, controls the circulation of ceramic microspheres in the heat recovery space through the microsphere circulation and conveying device, absorbs the heat of the slag bag passing through the heat recovery space, and transfers the heat into the steam generating device to generate stable and high-quality steam, which is then used for power generation, heating and other purposes. It can not only realize efficient heat recovery, but also realize controllable adjustment of the cooling rate. The heat recovery efficiency of this system is not less than 41%.

[0040] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 This is a schematic diagram of the overall structure of the copper smelting slag waste heat recovery system in Example 1 of the present application from a side view;

[0043] Figure 2 This is a schematic structural diagram of a cross section of a waste heat recovery room of a copper smelting slag waste heat recovery system in Example 2 of the present application;

[0044] Figure 3 It is a structural schematic diagram of a longitudinal section of the copper smelting slag waste heat recovery system (excluding the tunnel shell of the waste heat recovery room) in Example 2 of the present application;

[0045] Figure 4 This is a schematic diagram of the connection relationship and cross-section of a high-temperature bucket elevator, a low-temperature scraper conveyor, a high-temperature scraper conveyor, and a steam generating device in a copper smelting slag waste heat recovery system in Example 2 of the present application;

[0046] Figure 5 This is a schematic diagram of the connection relationship and cross-section of the medium-temperature bucket elevator, the rear medium-temperature scraper conveyor, and the front medium-temperature scraper conveyor in the copper smelting slag waste heat recovery system in Example 2 of the present application;

[0047] Figure 6 It is a schematic diagram of a cross section and a partially enlarged structure of a heat absorption structure in a copper smelting slag waste heat recovery system in Example 2 of the present application;

[0048] Figure 7 This is a module schematic diagram of the circulation routes and positional relationship of the first and second circulations in the copper smelting slag waste heat recovery system in Example 2 of the present application.

[0049] Icons: 100-Copper smelting slag waste heat recovery system; 1-ceramic microspheres; 2-waste heat recovery room; 21-heat recovery space; 22-tunnel shell; 221-frame structure; 222-external insulation layer; 223-entrance insulation door; 224-exit insulation door; 23-slow cooling section; 24-high temperature recovery section; 25-low temperature recovery section; 26-heat absorption structure; 261-upper heat extraction plate; 2611-surface heat absorption part; 262-side wall heat absorption plate; 2621-side wall heat absorption part; 263-sandwich flow channel ; 3-microsphere circulation conveying device; 31-scraper conveying equipment; 311-low-temperature scraper conveyor; 312-rear medium-temperature scraper conveyor; 313-front medium-temperature scraper conveyor; 314-high-temperature scraper conveyor; 315-microsphere regulating valve; 32-lifting equipment; 321-medium-temperature bucket elevator; 322-high-temperature bucket elevator; 323-microsphere metering equipment; 33-microsphere distributor; 4-steam generator; 5-heat source material transportation device; 51-track; 52-slag bag; 53-carrier. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0051] In the description of this application, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0052] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0053] Embodiment 1:

[0054] refer to Figure 1In Example 1 of the present application, a copper smelting slag waste heat recovery system 100 is provided, including: ceramic microspheres 1, a waste heat recovery room 2, a microsphere circulation conveying device 3, a steam generating device 4 and a heat source material transport device 5;

[0055] The waste heat recovery room 2 is provided with a heat recovery space 21;

[0056] The heat source material transport device 5 includes a track 51 and a carrier 53 for transporting a slag bag 52 of copper smelting slag; the carrier 53 can transport the slag bag 52 along the track 51 through the heat recovery space 21;

[0057] The microball circulation and conveying device 3 can control the ceramic microballs 1 to circulate in the heat recovery space 21 , absorb the heat of the slag bag 52 passing through the heat recovery space 21 , and input the recovered heat to the steam generating device 4 .

[0058] In conventional copper smelting systems, the cooling method of copper slag adopts natural air cooling plus forced water spray cooling. A large amount of heat energy is lost in the process. According to the mainstream 12 cubic meters of slag bag 52, the heat energy lost by each slag bag 52 is about 640kg of standard coal. In order to solve the above problems and improve the heat recovery efficiency, a copper smelting slag waste heat recovery system 100 is provided in the embodiment of the present application. In the copper smelting slag waste heat recovery system 100, ceramic microspheres 1 are used as heat transfer medium because of their excellent high temperature resistance and rapid heat absorption and heat release characteristics.

[0059] The ceramic microspheres 1 may be microspheres with a diameter of 4 mm, a maximum temperature resistance of 1600° C., and a maximum heat absorption temperature of 504° C. in the system.

[0060] In addition, other materials with similar properties can be used to achieve higher thermal efficiency and stability. In addition to ceramic microspheres1, there are other materials that have good fluidity, rapid heat absorption and heat release characteristics, and these materials can be used as potential substitutes for heat transfer media.

[0061] For example, the following materials may be included but are not limited to:

[0062] (1) Metals and their alloys: Metals such as copper and aluminum have high thermal conductivity, with thermal conductivity coefficients of 398 W / m·K and 247 W / m·K respectively. Alloys such as certain aluminum alloys can provide good thermal conductivity and low density, which helps to improve heat exchange efficiency.

[0063] (2) Silicon carbide (SiC): Silicon carbide is a semiconductor material with high thermal conductivity (about 270 W / m·K) and high temperature resistance, and is often used in high-temperature application scenarios.

[0064] (3) Boron nitride (BN): Hexagonal boron nitride (h-BN) is the ceramic coating with the best thermal conductivity in high temperature (above 500°C) environment, and is also the best ceramic insulating material at high temperatures.

[0065] (4) Nanofluids: Nanofluids are liquids containing nanometer-sized particles, which can be metals, non-metals, or oxides, dispersed in a suitable base liquid. Nanofluids have higher thermal conductivity than traditional liquids and can absorb and release large amounts of heat with small temperature changes.

[0066] (5) Phase change materials (PCM): PCMs absorb and release a large amount of latent heat during melting and solidification and have a high heat storage capacity. Their exothermic and endothermic properties under constant temperature conditions make them the preferred materials for waste heat recovery.

[0067] (6) Metal-ceramic composites: These materials combine the advantages of metals and ceramics, providing excellent thermal and mechanical properties.

[0068] (7) Hollow glass microspheres: have the characteristics of low density, high compressive strength, high temperature resistance and low thermal conductivity.

[0069] As mentioned above, the waste heat recovery room 2 is a space that provides a temperature-controlled environment for effective heat recovery. Heat exchange is performed inside the waste heat recovery room 2, and the ceramic microspheres 1 are used as a heat-conducting medium to absorb the heat of the copper slag. Through heat exchange, the waste heat of the copper slag can be effectively recovered.

[0070] The waste heat recovery room 2 can be constructed with heat-insulating materials to reduce heat loss. It can be in the shape of a tunnel structure, in which a heat recovery space 21 is provided for moving a carrier 53 for transporting the slag bag 52.

[0071] As mentioned above, the heat source material transport device 5 includes a track 51 and a carrier 53, and the carrier 53 is used to transport a slag bag 52 filled with copper smelting slag. The length direction of the track 51 can be parallel to the length direction of the waste heat recovery room 2, and the track 51 can be set in the waste heat recovery room 2, and can also be set at the bottom outside the waste heat recovery room 2. The carrier 53 is set on the track 51 and can move in the heat recovery space 21 along the length direction of the track 51.

[0072] The carrier 53 moves along the track 51 to transport the slag bag 52 from the smelting area to the waste heat recovery room 2 to perform energy recovery and control the cooling rate. The carrier 53 and the track 51 can realize the rapid and safe transportation of copper smelting slag.

[0073] As mentioned above, the bearing capacity of the track 51 can match the load capacity of the carrier 53 and the weight of the slag bag 52. For example, it can be a 38kg-class trolley travel track 51.

[0074] As mentioned above, electric, manual or fuel-driven transport vehicles can be used, and their movement mode can be towing by traction equipment, pushing and pulling by related motion devices in the rails, or each carrier 53 is provided with a driving device, such as a motor, etc., which moves independently.

[0075] As mentioned above, the track 51 is provided in the waste heat recovery room 2 ; and the track is also provided outside the waste heat recovery room 2 .

[0076] In a preferred embodiment, the carrier 53 (transport trolley) moves in a U-shaped circular motion based on the track 51, that is, after the carrier 53 drives out of the waste heat recovery room 2, it will move back to the entrance of the waste heat recovery room 2 in a controllable circular motion and re-enter it, thereby improving the recovery efficiency of heat radiation.

[0077] The heat source material transport device 5 , in addition to the carrier 53 and the track 51 , may also include a track-changing ferry vehicle. A track-changing ferry vehicle may be provided at the front and rear sections of the waste heat recovery room 2 to complete the track changing of the carrier 53 and realize the circulation operation of the carrier 53 .

[0078] The microsphere circulation conveying device 3 is a system for controlling the circulation of the ceramic microspheres 1 in the waste heat recovery space 21. The ceramic microspheres 1 absorb the heat of the slag bag 52 and transfer it to the steam generating device 4 to generate high-quality hot steam, thereby realizing the recovery of energy from heat radiation.

[0079] Among them, the ceramic microspheres 1 have high thermal conductivity and good fluidity, and are suitable as heat transfer media. By improving the heat recovery efficiency, heat loss is reduced. Specifically, the circulation of the ceramic microspheres 1 can be achieved through equipment such as scraper conveyors and bucket elevators.

[0080] The steam generating device 4 is a device for converting the recovered heat into steam, and is used to receive the heat transferred by the ceramic microspheres 1 to generate steam, thereby generating high-quality steam that can be used for heating, power generation, etc. through the steam generating device 4 .

[0081] The steam generator may include a pre-evaporator, a superheater, a first evaporator, a second evaporator, an economizer, and may also include a water supply system and a water treatment system.

[0082] The steam generating device 4 can improve the comprehensive utilization rate of energy and reduce the dependence on traditional energy. A multi-stage evaporator and superheater can be used to improve the quality and output of steam.

[0083] In the embodiment of the present application, in order to control the temperature drop rate during the slow cooling process of the copper slag, in the system, the ceramic microspheres 1 are controlled to circulate in the heat recovery space 21 through the microsphere circulation conveying device 3 to absorb the heat of the slag bag 52. Due to its high thermal conductivity and rapid heat absorption and heat release characteristics, the ceramic microspheres 1 can effectively absorb heat from the copper slag while keeping the temperature of the copper slag at a suitable rate. The waste heat recovery room 2 is provided with a heat recovery space 21, which is designed to control the temperature drop of the copper slag. By installing a heat absorbing plate and a heat extracting plate inside the waste heat recovery room 2, the heat released by the copper slag can be effectively absorbed, thereby controlling the temperature drop rate of the copper slag. The slag bag 52 transportation device includes a track 51 and a carrier 53, and the carrier 53 transports the slag bag 52 along the track 51 through the heat recovery space 21. By controlling the moving speed of the slag bag 52 in the heat recovery space 21, the temperature drop rate of the copper slag can be indirectly controlled. The steam generating device 4 receives the heat transferred by the ceramic microspheres 1 and generates steam. In this process, the heat absorbed by the ceramic microspheres 1 is used to generate steam instead of allowing the copper slag to cool quickly, which helps to maintain the temperature of the copper slag at a slower drop rate.

[0084] In addition, the temperature of the copper slag can be monitored in real time by installing a temperature sensor to ensure that the temperature drop rate meets expectations. By adjusting the operating speed of the slag bag 52 transport device, the residence time of the copper slag in the heat recovery space 21 can be controlled, thereby controlling the cooling rate. By adjusting the circulation flow of the ceramic microspheres 1, the rate of heat absorption can be controlled, and the temperature drop of the copper slag can be further controlled.

[0085] In the embodiment of the present application, the temperature drop rate of the copper slag can be accurately controlled by the coordinated work of the above-mentioned devices. By controlling the cooling rate, it is helpful to improve the recovery rate of copper and the grindability of the copper slag. The recovered heat can be used to generate steam for power generation or heating, thereby improving the comprehensive utilization rate of energy. In summary, the technology in the embodiment can achieve the temperature drop rate during the slow cooling process of the copper slag, which helps to improve the recovery efficiency of copper and the overall energy utilization efficiency.

[0086] Embodiment 2:

[0087] In this embodiment, based on the above-mentioned embodiment 1, a copper smelting slag waste heat recovery system 100 is provided. The waste heat recovery room 2 includes a tunnel shell 22, and a slow cooling section 23, a high temperature recovery section 24 and a low temperature recovery section 25 arranged in sequence in the tunnel shell 22.

[0088] As mentioned above, the slow cooling section 23, the high temperature recovery section 24 and the low temperature recovery section 25 are sequentially arranged and connected in the tunnel shell 22.

[0089] The tunnel shell 22 is the main structure of the waste heat recovery room 2, and provides a channel-like space. The tunnel shell 22 is provided with a slow cooling section 23, a high temperature recovery section 24 and a low temperature recovery section 25 in sequence. The tunnel shell 22 provides a continuous channel, so that the copper slag can pass through different heat recovery sections in sequence.

[0090] The slow cooling section 23 is the first part of the waste heat recovery room 2, which is used to initially reduce the temperature of the copper slag. In the slow cooling section 23, the temperature of the copper slag is slowly reduced to avoid the fine dispersion of copper particles caused by excessive cooling. The slow cooling section 23 helps the aggregation and growth of copper particles, thereby improving the subsequent recovery efficiency.

[0091] The high temperature recovery section 24 is the second part of the waste heat recovery room 2, and is used to recover heat when the temperature of the copper slag is high. In the high temperature recovery section 24, a large amount of heat released by the copper slag is absorbed by the ceramic microspheres 1.

[0092] The low temperature recovery section 25 is the last part of the waste heat recovery room 2 and is used for the final heat recovery when the temperature of the copper slag is relatively low.

[0093] refer to Figure 2 The tunnel shell 22 includes a frame structure 221 and an external insulation layer 222 provided on the frame structure 221, and an entrance insulation door 223 and an exit insulation door 224 provided at both ends of the frame structure 221 in the length direction for the vehicle 53 to enter and leave;

[0094] The thickness of the external insulation layer 222 is at least 300 mm.

[0095] As mentioned above, the frame structure 221 can be a steel structure, which plays a supporting and positioning role. Outside the frame structure 221, an external insulation layer 222 is provided as the main structure. For example, heat-resistant concrete can be used to form the main structure by on-site casting.

[0096] The outer surface of the frame structure 221 may be coated with high temperature resistant fireproof paint to further improve the high temperature resistance performance.

[0097] The entrance insulation door 223 and the exit insulation door 224 are arranged at both ends of the tunnel shell 22 in the length direction, and are used for the vehicle 53 to enter and leave respectively. The insulation door can be opened and closed by moving up and down in a gantry style. When the vehicle 53 (such as trolley A) carrying the slag bag 52 reaches the entry position, the exit insulation door 224 is opened first, and the terminal vehicle 53 (trolley B) drives out. After the exit insulation door 224 is closed, the entrance insulation door 223 is opened, and the vehicle 53 (trolley A) enters. The setting of the entrance insulation door 223 and the exit insulation door 224 plays a role in heat insulation and heat preservation for the waste heat recovery room 2.

[0098] refer to Figure 3The carrier 53 can carry the slag bag 52 along the track 51 in the heat recovery space 21 of the waste heat recovery room 2, and pass through the slow cooling section 23, the high temperature recovery section 24 and the low temperature recovery section 25 in sequence.

[0099] As described above, the vehicles 53 can form a queue on the track 51 so as to move forward in an orderly manner, thereby completing heat recovery and control of the cooling rate during the moving process.

[0100] For further reference, Figure 4 and Figure 5 The slow cooling section 23, the high temperature recovery section 24 and the low temperature recovery section 25 are all provided with a heat absorption structure 26;

[0101] The heat absorption structure 26 is adapted to the shape of the carrier 53 that passes through the heat recovery space 21 and transports the slag ladle 52 of copper smelting slag, so as to receive heat radiation from the upper surface and side walls of the slag ladle 52 .

[0102] As mentioned above, the heat absorbing structure 26 is a device arranged in the slow cooling section 23, the high temperature recovery section 24 and the low temperature recovery section 25. The heat absorbing structure 26 receives the heat radiation from the upper surface and the side wall of the slag bag 52. The heat of the copper slag can be absorbed more effectively through the heat absorbing structure 26. The heat absorbing structure 26 can be a specially designed plate or tube, which is adapted to the shape of the carrier 53 carrying the slag bag 52, so that when the carrier 53 carries the slag bag 52, the heat radiation therein can be efficiently recovered.

[0103] As mentioned above, the material of the heat absorption structure 26 may be silicon carbide, or other materials that can withstand high temperatures and can effectively recover heat.

[0104] The above-mentioned, being adapted to the outer shape of the carrier 53 carrying the slag bag 52, refers to the carrier 53 carrying the slag bag 52, as a transport entity, being different from the front and rear directions of the movement of the transport entity, such as the left side, right side and top of the transport entity. The left side and right side of the transport entity are the sides of the carrier 53, and the top of the transport entity is the shape of the upper surface after the slag bag 52 is placed. In the embodiment of the present application, the heat absorption structure 26 is limited to being adapted to the outer shape of the carrier 53 that passes through the heat recovery space 21 and transports the slag bag 52 of copper smelting slag, that is, by making the shape of the inner surface of the heat absorption structure 26 as close as possible to at least one of the left side, right side and top of the transport entity, more efficient recovery of heat radiation can be achieved.

[0105] For further reference, Figure 6The heat absorbing structure 26 includes: an upper heat absorbing plate 261 disposed in the slow cooling section 23; and a side wall heat absorbing plate 262 and an upper heat absorbing plate 261 disposed in the high temperature recovery section 24 and the low temperature recovery section 25;

[0106] The upper heat absorbing plate 261 is used to absorb the heat radiation from the upper surface of the slag bag 52 ; the side wall heat absorbing plate 262 is used to absorb the heat radiation from the side wall of the heat source material transportation device 5 .

[0107] As mentioned above, the heat absorbing structure 26 includes two main parts, namely, an upper heat absorbing plate 261 and a side wall heat absorbing plate 262. The upper heat absorbing plate 261 can be arranged in the slow cooling section 23 to absorb the heat radiation from the upper surface of the slag bag 52. The side wall heat absorbing plate 262 can be arranged in the high temperature recovery section 24 and the low temperature recovery section 25 to absorb the heat radiation from the side wall of the slag bag 52.

[0108] The upper heat extraction plate 261 and the side wall heat absorption plate 262 are designed to interact with the slag ladle 52 to optimize heat absorption. Through these heat absorption structures 26, the system can more effectively absorb heat from the slag ladle 52 and improve the waste heat recovery efficiency. In order to maximize heat recovery, heat needs to be absorbed from all accessible surfaces of the slag ladle 52 (including the upper surface and the side walls).

[0109] It should be noted that when the carrier 53 carries the slag bag 52 and moves in the waste heat recovery room 2, the direction of its heat radiation may include the direction directly above it, that is, the direction of the upper surface, and the direction of the side walls at both ends that are different from the forward direction. In order to recover heat more efficiently, in this embodiment, two parts of the heat absorption structure 26 are respectively provided, corresponding to the side wall and the upper surface, respectively, for recovering the differential heat radiation at the corresponding positions, thereby improving the heat recovery efficiency, reducing heat loss, and optimizing energy utilization.

[0110] The upper heat extraction plate 261 and the side wall heat absorption plate 262 may be made of high thermal conductivity materials, such as carbon steel or alloy, and the surface may be coated with high emissivity materials, or silicon-containing materials, such as silicon carbide plates.

[0111] The upper heat extraction plate 261 may be located at the top of the slow cooling section 23 and is designed to absorb heat radiation from the upper surface of the slag ladle 52. When the slag ladle 52 passes through the slow cooling section 23, the upper heat extraction plate 261 absorbs heat from the upper surface of the slag ladle 52, thereby facilitating the initial cooling of the slag ladle 52 and recovering heat at the same time.

[0112] The side wall heat absorbing plate 262, located in the high temperature recovery section 24 and the low temperature recovery section 25, is designed to absorb the heat radiation from the side wall of the slag ladle 52. When the slag ladle 52 passes through these sections, the side wall heat absorbing plate 262 absorbs the heat from the side wall of the slag ladle 52. This helps to continuously cool the slag ladle 52 while further recovering heat.

[0113] Furthermore, in the high-temperature recovery section 24 and the low-temperature recovery section 25, the upper heat extraction plate 261 and the side wall heat absorption plate 262 are cross-arranged, and each independently constitutes a tunnel-shaped structure that can be used for the carrier 53 to pass through;

[0114] In the high-temperature recovery section 24 and the low-temperature recovery section 25, the upper heat extraction plate 261 and the side wall heat absorption plate 262 are both provided with a Z-shaped interlayer flow channel 263 for the flow of the ceramic microspheres 1, and the interlayer flow channels 263 in the upper heat extraction plate 261 and the side wall heat absorption plate 262 are not interconnected;

[0115] The tunnel-shaped structure of the upper heat extractor plate 261 is provided with a surface heat absorbing portion 2611 for absorbing the heat radiation from the upper surface of the slag bag 52;

[0116] In the tunnel-shaped structure of the side wall heat absorbing plate 262 , a side wall heat absorbing portion 2621 for absorbing heat radiation from the side wall of the heat source material transportation device 5 is provided.

[0117] As mentioned above, the upper heat extraction plate 261 is arranged at the top of the high temperature recovery section 24 and the low temperature recovery section 25, and is used to absorb the heat radiation from the upper surface of the slag bag 52. The side wall heat absorption plate 262 is arranged on both sides of the high temperature recovery section 24 and the low temperature recovery section 25, and is used to absorb the heat radiation from the side wall of the slag bag 52. Through the cross-arranged arch structure, the heat absorption area can be maximized and the heat recovery efficiency can be improved.

[0118] As mentioned above, the arch structure can be formed by overlapping, connecting, etc. two independent units. For example, the first heat extraction plate and the second heat extraction plate are symmetrically arranged, so that the first heat extraction plate and the second heat extraction plate are combined to form a space with a passage in the middle for the carrier 53 to pass through.

[0119] The upper heat extraction plate 261 and the side wall heat absorption plate 262 are cross-arranged to form an arch structure to facilitate the passage of the carrier 53 and the slag bag 52.

[0120] In addition, both the upper heat extraction plate 261 and the side wall heat absorption plate 262 can adopt a modular design to facilitate installation and maintenance.

[0121] The plates of the upper heat extraction plate 261 and the side wall heat absorption plate 262 are both provided with a Z-shaped interlayer flow channel 263 for the flow of the ceramic microspheres 1. The ceramic microspheres 1 flow in the Z-shaped flow channel and absorb the heat absorbed by the plate. Through the Z-shaped flow channel, the flow trajectory (path) of the ceramic microspheres 1 is extended, the residence time is extended, the contact area between the ceramic microspheres 1 and the heat absorption plate is increased, and the heat exchange efficiency is further improved.

[0122] As mentioned above, the surface heat absorbing portion 2611 is provided in the arch structure of the upper heat extracting plate 261, and is used to absorb the heat radiation from the upper surface of the slag bag 52. The side wall heat absorbing portion 2621 is provided in the arch structure of the side wall heat absorbing plate 262, and is used to absorb the heat radiation from the side wall of the slag bag 52. The surface heat absorbing portion 2611 and the side wall heat absorbing portion 2621 can directly absorb the heat radiation from the surface and side of the slag bag 52, thereby achieving high efficiency in absorbing heat. The heat absorbing portion can be made of high emissivity material to improve the heat absorption capacity.

[0123] For further reference, Figure 4 and Figure 5 The microsphere circulation conveying device 3 comprises: a scraper conveying device 31, a lifting device 32 and a microsphere distributor 33;

[0124] The lifting device 32 and the steam generating device 4 are arranged in the middle of the waste heat recovery room 2 and at the junction of the low temperature recovery section 25 and the high temperature recovery section 24;

[0125] The scraper conveying device 31 is connected to the heat absorbing structure 26 and is capable of receiving the ceramic microspheres 1 flowing out of the heat absorbing structure 26;

[0126] The scraper conveying device 31 and the lifting device 32 can transfer the ceramic microspheres 1 to the steam generating device 4 through the microsphere distributor 33 .

[0127] The microsphere circulation transport device 3 comprises the following parts:

[0128] The scraper conveying device 31 is connected to the heat absorbing structure 26 and is used to receive the ceramic microspheres 1 flowing out of the heat absorbing structure 26 .

[0129] Lifting equipment 32: located in the middle of the waste heat recovery room 2, used to lift the ceramic microspheres 1 from the junction of the low-temperature recovery section 25 and the high-temperature recovery section 24 to the steam generating device 4.

[0130] Microsphere distributor 33 : used to evenly distribute the ceramic microspheres 1 into the steam generating device 4 .

[0131] The scraper conveyor 31 is responsible for collecting hot ceramic microspheres 1 from the heat absorbing structure 26. The lifting device 32 lifts the ceramic microspheres 1 to the required height of the steam generating device 4. The microsphere distributor 33 ensures that the ceramic microspheres 1 are evenly distributed in the steam generating device 4.

[0132] The microsphere circulation and transportation device 3 ensures that the ceramic microspheres 1 can be efficiently transported from the waste heat recovery area to the steam generation device 4 .

[0133] The scraper conveying device 31 may be a conveying device connected to the heat absorbing structure 26. The scraper conveying device 31 collects hot ceramic microspheres 1 along the heat absorbing structure 26. Thus, the heat in the heat absorbing structure 26 is effectively transferred to the ceramic microspheres 1. The heat recovery process is simplified and the heat utilization rate is improved.

[0134] Specifically, the scraper conveying device 31 can be designed to have adjustable speed to adapt to different operating conditions.

[0135] As mentioned above, the lifting device 32 is a lifting device located in the middle of the waste heat recovery room 2. It is used to lift the ceramic microspheres 1 from the junction of the low-temperature recovery section 25 and the high-temperature recovery section 24 to the steam generating device 4, thereby realizing the vertical transportation of the ceramic microspheres 1. The purpose is to lift the ceramic microspheres 1 to a certain height for the next step of heat recovery. The lifting device 32 can adopt a hydraulic or pneumatic system.

[0136] As mentioned above, the microsphere distributor 33 is a device for uniformly distributing the ceramic microspheres 1. The ceramic microspheres 1 transported by the lifting device 32 are uniformly distributed to the steam generator 4, thereby ensuring the heat exchange efficiency in the steam generator 4. The purpose is to improve the heat exchange efficiency of the steam generator 4 and prevent the accumulation of microspheres. Through the microsphere distributor 33, it is possible to improve the heat exchange efficiency and reduce the uneven distribution of microspheres.

[0137] The microsphere distributing machine 33 can adopt a rotary or vibrating distributing method.

[0138] As mentioned above, the lifting device 32, the microsphere distributor 33 and the scraper conveyor 31, their equipment and / or the pipelines therein, can be installed with 300mm insulation.

[0139] Furthermore, the scraper conveyor equipment 31 includes a low-temperature scraper conveyor 311, a rear medium-temperature scraper conveyor 312, a front medium-temperature scraper conveyor 313 and a high-temperature scraper conveyor 314;

[0140] The low-temperature scraper conveyor 311 and the front medium-temperature scraper conveyor 313 are arranged above the heat recovery space 21 of the waste heat recovery room 2, and are arranged above the carrier 53 for transporting the slag bag 52, as an upper structure; in the upper structure, the low-temperature scraper conveyor 311 and the front medium-temperature scraper conveyor 313 are both provided with a microball regulating valve 315;

[0141] The post-medium temperature scraper conveyor 312 and the high temperature scraper conveyor 314 are arranged below the waste heat recovery room 2 as a lower structure;

[0142] The length directions of the low-temperature scraper conveyor 311, the rear medium-temperature scraper conveyor 312, the front medium-temperature scraper conveyor 313 and the high-temperature scraper conveyor 314 are parallel to the length direction of the waste heat recovery room 2;

[0143] In the slow cooling section 23, the high temperature recovery section 24 and the low temperature recovery section 25, the side wall heat absorption plate 262 and the upper heat extraction plate 261 can receive the ceramic microspheres 1 flowing downward in the upper structure, and drain the ceramic microspheres 1 to the lower structure through the interlayer flow channel 263 in the heat absorption structure 26.

[0144] As mentioned above, the scraper conveyor 31 is a machine for conveying materials, which conveys materials by using a reciprocating scraper chain in a closed shell. It includes a low-temperature scraper conveyor 311, a rear medium-temperature scraper conveyor 312, a front medium-temperature scraper conveyor 313 and a high-temperature scraper conveyor 314. The low-temperature scraper conveyor 311 and the front medium-temperature scraper conveyor 313 are located above the waste heat recovery room 2, and the rear medium-temperature scraper conveyor 312 and the high-temperature scraper conveyor 314 are located below. The length direction of these scraper conveyors is parallel to the length direction of the waste heat recovery room 2.

[0145] The ceramic microspheres 1 flowing out of the heat absorbing structure 26 are received by the scraper conveying device 31, and the ceramic microspheres 1 are conveyed to the lifting device 32 by the conveyor. The scraper conveyor can continuously convey materials and improve efficiency. The closed shell can prevent material scattering and environmental pollution. Materials of different shapes and sizes can be conveyed.

[0146] As mentioned above, the scraper conveyor can drive the chain through the motor, and the scrapers on the chain push the materials forward.

[0147] As mentioned above, the lifting device 32 is used to transport materials vertically, and is usually composed of a bucket elevator or a belt elevator. The lifting device 32 can be arranged in the middle of the waste heat recovery room 2, at the junction of the low temperature recovery section 25 and the high temperature recovery section 24. The ceramic microspheres 1 are lifted from the low temperature area to the high temperature area, or from the bottom to the top, by the lifting device 32. In this embodiment, the ceramic microspheres 1 are lifted from the bottom to the top.

[0148] The lifting device 32 can usually use a motor to drive a belt or a chain to lift the material through a bucket structure or a spiral structure.

[0149] As mentioned above, the microsphere distributor 33 is a device for evenly distributing materials, and is used to evenly distribute materials on a conveyor belt or in a furnace. The ceramic microspheres 1 are evenly distributed in the steam generator 4 to improve the heat exchange efficiency. The microsphere distributor 33 can ensure that the materials are evenly distributed and improve the heat exchange efficiency. The uniformity of the distribution can be adjusted as needed. The microsphere distributor 33 can use a rotating distribution disk or a vibrating distribution machine, and the distribution of the materials can be controlled by adjusting the rotation speed or vibration frequency of the distribution disk.

[0150] The scraper conveying device 31 is arranged in the overall space of the copper smelting slag waste heat recovery system 100, and is divided into an upper structure and a lower structure; wherein the ceramic microspheres 1 in the upper structure are drained to the lower structure through the interlayer flow channel 263 in the heat absorption structure 26. In the scraper conveying device 31 and the lifting device 32, the scraper conveying device 31 conveys the ceramic microspheres 1 to the lifting device 32, and the lifting device 32 lifts the ceramic microspheres 1 to the steam generating device 4. Between the lifting device 32 and the microsphere distributor 33, the lifting device 32 conveys the ceramic microspheres 1 to the microsphere distributor 33, and the microsphere distributor 33 evenly distributes the ceramic microspheres 1 to the steam generating device 4.

[0151] Further, the lifting equipment 32 includes a medium-temperature bucket elevator 321 and a high-temperature bucket elevator 322;

[0152] The lower end opening of the steam generating device 4 is connected to the low-temperature scraper conveyor 311, and the ceramic microspheres 1 in the steam generating device 4 can be released into the low-temperature scraper conveyor 311 through the microsphere regulating valve 315, and transported to an end away from the steam generating device 4 through the low-temperature scraper conveyor 311;

[0153] The conveying direction of the rear medium-temperature scraper conveyor 312 is opposite to that of the low-temperature scraper conveyor 311; and the front end of the rear medium-temperature scraper conveyor 312 is connected to the bottom end of the medium-temperature bucket elevator 321; the rear medium-temperature scraper conveyor 312 can receive the ceramic microspheres 1 flowing out of the low-temperature scraper conveyor 311 through the heat absorption structure 26, and convey the ceramic microspheres 1 to the bottom end of the medium-temperature bucket elevator 321;

[0154] A microball metering device 323 is provided at the upper end of the medium-temperature bucket elevator 321; and the ceramic microballs 1 are released onto the front medium-temperature scraper conveyor 313 through the microball metering device 323, and are transported to an end away from the medium-temperature bucket elevator 321 through the front medium-temperature scraper conveyor 313;

[0155] The high-temperature scraper conveyor 314 has a conveying direction opposite to that of the front medium-temperature scraper conveyor 313; and the rear end of the front medium-temperature scraper conveyor 313 is connected to the bottom end of the high-temperature bucket elevator 322; the high-temperature scraper conveyor 314 can receive the ceramic microspheres 1 released by the front medium-temperature scraper conveyor 313 based on the microsphere regulating valve 315 and flowing out through the heat absorption structure 26, and convey the ceramic microspheres 1 to the bottom end of the high-temperature bucket elevator 322;

[0156] The microball distributor 33 is provided at the top of the high-temperature bucket elevator 322, and the high-temperature bucket elevator 322 can lift the ceramic microballs 1 received at the bottom upward, transport them to the microball distributor 33, and transport them to the upper opening of the steam generating device 4 through the microball distributor 33.

[0157] As mentioned above, the lifting device 32 is used to transport materials vertically. In this embodiment, it is composed of a bucket elevator. The lifting devices 32 are all arranged in the middle of the waste heat recovery room 2, at the junction of the low-temperature recovery section 25 and the high-temperature recovery section 24. Functionally, the lifting device 32 lifts the ceramic microspheres 1 from the low-temperature area to the high-temperature area, or from the bottom to the top. By using the lifting device 32, space is saved and the flexibility of the layout is improved.

[0158] As mentioned above, in the lifting equipment 32, the medium-temperature bucket elevator 321 is located in the middle of the waste heat recovery room 2. It is used to lift the ceramic microspheres 1 transported by the post-medium-temperature scraper conveyor 312 to a certain height. The medium-temperature bucket elevator 321 can save space and improve the material transportation efficiency.

[0159] Specifically, a microball metering device 323 may be provided at the upper end to accurately control the flow of the material. A motor-driven bucket elevator may be used, the bucket being connected to a chain, and the material is lifted by the cyclic motion of the chain.

[0160] As mentioned above, the high-temperature bucket elevator 322 in the lifting device 32 is located in the middle of the waste heat recovery room 2. It is used to lift the ceramic microspheres 1 transported by the high-temperature scraper conveyor 314 to the upper part of the steam generating device 4. The medium-temperature bucket elevator 321 is suitable for conveying high-temperature materials. Specifically, a motor-driven bucket elevator can also be used, and the bucket is connected to the chain, and the material is lifted through the circular motion of the chain.

[0161] As mentioned above, the low-temperature scraper conveyor 311 is connected to the lower opening of the steam generator 4. It is used to release the ceramic microspheres 1 in the steam generator 4 through the microsphere regulating valve 315 and convey them to the end away from the steam generator 4. The scraper conveyor provides smooth material transportation, and the flow rate of the material can be controlled by the regulating valve. Specifically, the continuous transportation of materials can be achieved through the chain and scraper driven by the motor.

[0162] As mentioned above, the rear medium-temperature scraper conveyor 312 has a conveying direction opposite to that of the low-temperature scraper conveyor 311, and its front end is connected to the bottom end of the medium-temperature bucket elevator 321. It is used to receive the ceramic microspheres 1 flowing out of the low-temperature scraper conveyor 311 and convey them toward the bottom end of the medium-temperature bucket elevator 321. The rear medium-temperature scraper conveyor 312 has a reverse conveying function, which helps to redistribute and circulate materials, and ensures the continuous flow of materials through continuous conveying. Similarly, the continuous conveying of materials can be achieved through chains and scrapers driven by motors.

[0163] As mentioned above, the front medium temperature scraper conveyor 313 can be connected to the upper end of the medium temperature bucket elevator 321 , and is used to receive the ceramic microspheres 1 released by the medium temperature bucket elevator 321 , and convey the materials to an end away from the medium temperature bucket elevator 321 .

[0164] As mentioned above, the high temperature scraper conveyor 314 has a conveying direction opposite to that of the front medium temperature scraper conveyor 313, and its rear end (the end away from the entrance hot spot) is connected to the bottom end of the high temperature bucket elevator 322. It is used to receive the ceramic microspheres 1 flowing out of the front medium temperature scraper conveyor 313 and convey them to the bottom end of the high temperature bucket elevator 322; the high temperature bucket elevator 322 lifts the ceramic microspheres 1 received at the bottom end upwards, conveys them to the microsphere distributor 33, and then conveys them to the upper opening of the steam generator 4 through the microsphere distributor 33.

[0165] In the upper structure, a microball regulating valve 315 is provided at the lower end of the front medium-temperature scraper conveyor 313, and this part extends to the slow cooling section 23. The tunnel is flat-topped, and a heat absorption structure 26 can be provided only on the inner wall of the tunnel on both sides. When the temperature of the side wall of the carrier 53 carrying the slag bag 52 rises to above 550°C, the microball regulating valve 315 can be controlled to open, and the medium-temperature ceramic microballs 1 of the front medium-temperature scraper conveyor 313 can be used to cool the temperature of the slag bag 52 traveling to the slow cooling section 23, thereby achieving conditional cooling at a controllable cooling rate.

[0166] A heat absorption structure 26 is provided between the low-temperature scraper conveyor 311 in the upper structure and the rear medium-temperature scraper conveyor 312 in the lower structure, which may be the side wall heat absorption plate 262 and the upper heat extraction plate 261; the side wall heat absorption plate 262 and the upper heat extraction plate 261 may respectively constitute an "arch structure" or an "eight"-shaped structure, and are respectively connected to the low-temperature scraper conveyor 311 at the upper end and the rear medium-temperature scraper conveyor 312 at the lower end.

[0167] For example, the side wall heat absorbing plate 262 and the upper heat collecting plate 261 forming the "eight"-shaped structure are divided into two parts from the middle, namely the side wall heat absorbing plate 262 and the upper heat collecting plate 261 on the left side, and the side wall heat absorbing plate 262 and the upper heat collecting plate 261 on the right side. Among them, the side wall heat absorbing plate 262 and the upper heat collecting plate 261 on the left are respectively connected to the low-temperature scraper conveyor 311 at the upper end of the left side, and at the same time, the side wall heat absorbing plate 262 and the upper heat collecting plate 261 on the left are also respectively connected to the rear medium-temperature scraper conveyor 312 at the lower end of the left side; therefore, in the left direction, the ceramic microspheres 1 in the low-temperature scraper conveyor 311 at the upper end of the left side can respectively enter the side wall heat absorbing plate 262 and the upper heat collecting plate 261 on the left side, and flow to the rear medium-temperature scraper conveyor 312 (or upper surface) at the lower end of the left side through the Z-shaped interlayer flow channel 263 in the respective plates of the side wall heat absorbing plate 262 and the upper heat collecting plate 261 by gravity.

[0168] Similarly, a heat absorbing structure 26 can also be provided between the front medium temperature scraper conveyor 313 in the upper structure and the high temperature scraper conveyor 314 in the lower structure, which can be a side wall heat absorbing plate 262 and an upper heat collecting plate 261; the side wall heat absorbing plate 262 and the upper heat collecting plate 261 can respectively form an "arch structure" or an "eight" shaped structure, and are respectively connected to the front medium temperature scraper conveyor 313 at the upper end and the high temperature scraper conveyor 314 at the lower end. Its running direction, the way of microsphere flow, and the connection relationship and position relationship are the same as those of the above structure.

[0169] Based on the structure of the copper smelting slag waste heat recovery system 100, it is equivalent to forming two material cycles of ceramic microspheres 1 that can be linked together, thereby realizing an overall cycle for heat recovery generated by the slag bag 52. Figure 7 , which may include the following:

[0170] (1) First cycle: The steam generator located at the junction of the high-temperature recovery section 24 and the low-temperature recovery section 25 releases ceramic microspheres 1 with a temperature of about 100°C after exothermic through its lower discharge port. The ceramic microspheres 1 flow by gravity to the low-temperature scraper conveyor 311 of the upper structure in the heat recovery space 21 of the waste heat recovery room 2, and the ceramic microspheres 1 are conveyed to the direction away from the entrance insulation door 223 of the copper smelting slag waste heat recovery system 100. The ceramic microspheres 1 pass through multiple microsphere control valves of the low-temperature recovery section 25, and enter the heat absorbing plates arranged on the side slopes and the heat absorbing structures 26 located inward on both sides of the tunnel (side wall heat absorbing plates). 262 and the upper heat extraction plate 261), the ceramic microspheres 1 flow downward by gravity in the heat absorption structure 26 (through the Z-shaped interlayer flow channel 263), and are heated to 304°C by the heat radiation from the upper surface of the slag bag 52 and the side wall of the slag bag 52 during the flow, and then enter the rear medium-temperature scraper conveyor 312 located in the lower structure together, and are transmitted to the medium-temperature bucket elevator 321 through the rear medium-temperature scraper conveyor 312, and are lifted to the microsphere metering device 323 with an outlet elevation of 8.34 meters by the rear medium-temperature bucket elevator 321, and then flow into the front medium-temperature scraper conveyor 313 at the lower outlet of the microsphere metering device 323 by gravity.

[0171] (2) Second cycle: After receiving the ceramic microspheres 1, the front medium-temperature scraper conveyor 313 conveys the ceramic microspheres 1 to the high-temperature section and slow cooling section 23. In the high-temperature section and slow cooling section 23, the ceramic microspheres 1 are heated to 504°C and then enter the heat absorbing plates arranged on the side slopes and the heat absorbing structures 26 located inward on both sides of the tunnel (the side wall heat absorbing plates 262 and the upper heat extracting plates 261) through the front medium-temperature scraper conveyor 313. The ceramic microspheres 1 are heated to 504°C in the high-temperature section and slow cooling section 23. The flow channel 263) flows downward by gravity to the high-temperature scraper conveyor 314 in the lower structure, and then is sent to the high-temperature bucket elevator 322 through the high-temperature scraper conveyor 314. When the side wall temperature of the slag bag 52 rises to above 550°C, the microball regulating valve 315 is opened to cool the slag bag 52 in the slow cooling section 23 with the medium-temperature ceramic balls. The ceramic microballs 1 at 504°C received in the high-temperature scraper conveyor 314 in the lower structure of the slow cooling section 23 are further sent to the high-temperature bucket elevator 322 through the high-temperature scraper conveyor 314. The high-temperature ceramic microballs 1 are then sent to the microball distributor 33 with an elevation of 20,700 mm through the high-temperature bucket elevator 322, and flow by gravity into the storage part of the high-temperature ceramic microballs 1 at the top of the steam generator through the microball distributor 33.

[0172] After entering the steam generator, it can pass through the pre-evaporator, superheater, first evaporator, second evaporator and economizer of the steam generator in sequence. After releasing heat, the temperature drops to 100°C, completing the ceramic microsphere 1 cycle.

[0173] It should be noted that the medium-temperature bucket elevator 321 can also have the function of inputting room-temperature ceramic microspheres 1 to replenish room-temperature materials; and the low-temperature scraper conveyor 311 located in the structure above the tunnel can also be provided with an opening for unloading the ceramic microspheres 1, thereby realizing the replenishment and replacement of the ceramic microspheres 1 materials, or other processing of the ceramic microspheres 1.

[0174] In addition, in a preferred embodiment, multiple scraper conveying equipment 31 (low-temperature scraper conveyor 311, rear medium-temperature scraper conveyor 312, front medium-temperature scraper conveyor 313 and high-temperature scraper conveyor 314), lifting equipment 32 (medium-temperature bucket elevator 321 and high-temperature bucket elevator 322) and microsphere distributor 33 can be set. For example, in the cross section, with the carrier 53 as the middle position, a group of low-temperature scraper conveyor 311, rear medium-temperature scraper conveyor 312, front medium-temperature scraper conveyor 313 and high-temperature scraper conveyor 314, as well as medium-temperature bucket elevator 321 and high-temperature bucket elevator 322 are set in the left and right directions of the carrier 53. At the same time, multiple high-temperature scraper conveyors 314 are set accordingly, so as to further improve the heat recovery effect and effectively control the cooling rate of the slag bag 52.

[0175] It should be noted that, in the absence of conflict, the features in the embodiments of this application may be combined with each other.

[0176] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A copper smelting slag waste heat recovery system, characterized in that: include: Ceramic microspheres, waste heat recovery room, microsphere circulation conveying device, steam generating device and heat source material transport device; The waste heat recovery room is provided with a heat recovery space; The heat source material transport device comprises a track and a carrier for transporting a slag bag of copper smelting slag; the carrier can transport the slag bag along the track through the heat recovery space; The microball circulation and conveying device can control the ceramic microballs to circulate in the heat recovery space, absorb the heat of the slag bag passing through the heat recovery space, and input the recovered heat into the steam generating device.

2. The copper smelting slag waste heat recovery system according to claim 1, characterized in that: The waste heat recovery room comprises a tunnel shell, and a slow cooling section, a high temperature recovery section and a low temperature recovery section which are sequentially arranged in the tunnel shell.

3. The copper smelting slag waste heat recovery system according to claim 2, characterized in that: The tunnel shell includes a frame structure and an external insulation layer provided on the frame structure, and an entrance insulation door and an exit insulation door provided at both ends of the frame structure in the length direction for the vehicle to enter and leave; The thickness of the external insulation layer is at least 300 mm.

4. The copper smelting slag waste heat recovery system according to claim 2, characterized in that: The carrier can carry the slag bag along the track in the heat recovery space of the waste heat recovery room, and pass through the slow cooling section, the high temperature recovery section and the low temperature recovery section in sequence.

5. The copper smelting slag waste heat recovery system as claimed in claim 2, characterized in that: The slow cooling section, the high temperature recovery section and the low temperature recovery section are all provided with a heat absorption structure; The heat absorbing structure is adapted to the outer shape of the carrier that passes through the heat recovery space and transports the slag ladle of copper smelting slag, so as to receive heat radiation from the upper surface and side walls of the slag ladle.

6. The copper smelting slag waste heat recovery system as claimed in claim 5, characterized in that: The heat absorption structure comprises: an upper heat absorbing plate and a side wall heat absorbing plate; Wherein, the upper heat extraction plate is provided in the slow cooling section; the side wall heat absorption plate and the upper heat extraction plate are provided in the high temperature recovery section and the low temperature recovery section; The upper heat extraction plate is used to absorb the heat radiation from the upper surface of the slag ladle; The side wall heat absorbing plate is used to absorb the heat radiation from the side wall of the heat source material transportation device.

7. The copper smelting slag waste heat recovery system according to claim 6, characterized in that: In the high-temperature recovery section and the low-temperature recovery section, the upper heat extraction plate and the side wall heat absorption plate are cross-arranged, and the upper heat extraction plate and the side wall heat absorption plate each independently form a tunnel-shaped structure that can be used for the vehicle to pass through; In the high-temperature recovery section and the low-temperature recovery section, the upper heat extraction plate and the side wall heat absorption plate are both provided with a Z-shaped interlayer flow channel for the flow of the ceramic microspheres, and the interlayer flow channels in the upper heat extraction plate and the side wall heat absorption plate are not interconnected; The tunnel-shaped structure of the upper heat extractor plate is provided with a surface heat absorbing portion for absorbing the heat radiation from the upper surface of the slag ladle; A side wall heat absorbing portion for absorbing heat radiation from the side wall of the heat source material transport device is provided in the tunnel-shaped structure of the side wall heat absorbing plate.

8. The copper smelting slag waste heat recovery system according to claim 7, characterized in that: The microsphere circulation conveying device comprises: a scraper conveying device, a lifting device and a microsphere distributor; The lifting equipment and the steam generating device are arranged in the middle of the waste heat recovery room and at the junction of the low temperature recovery section and the high temperature recovery section; The scraper conveying device is connected to the heat absorbing structure and is capable of receiving the ceramic microspheres flowing out of the heat absorbing structure; The scraper conveying device and the lifting device can transfer the ceramic microspheres to the steam generating device through the microsphere distributor.

9. The copper smelting slag waste heat recovery system according to claim 8, characterized in that: The scraper conveying equipment includes a low-temperature scraper conveyor, a rear medium-temperature scraper conveyor, a front medium-temperature scraper conveyor and a high-temperature scraper conveyor; The low-temperature scraper conveyor and the front medium-temperature scraper conveyor are arranged above the heat recovery space of the waste heat recovery room, and are arranged above the carrier for transporting the slag bag, as an upper structure; in the upper structure, the low-temperature scraper conveyor and the front medium-temperature scraper conveyor are both provided with a microball regulating valve; The post-medium temperature scraper conveyor and the high temperature scraper conveyor are arranged below the waste heat recovery room as a lower structure; The length directions of the low-temperature scraper conveyor, the rear medium-temperature scraper conveyor, the front medium-temperature scraper conveyor and the high-temperature scraper conveyor are parallel to the length direction of the waste heat recovery room; In the slow cooling section, the high temperature recovery section and the low temperature recovery section, the side wall heat absorption plate and the upper heat extraction plate can receive the ceramic microspheres flowing downward in the upper structure, and guide the ceramic microspheres to the lower structure through the interlayer flow channel in the heat absorption structure.

10. The copper smelting slag waste heat recovery system according to claim 9, characterized in that: The lifting equipment includes a medium-temperature bucket elevator and a high-temperature bucket elevator; The lower end opening of the steam generating device is connected to the low-temperature scraper conveyor, and the ceramic microspheres in the steam generating device can be released into the low-temperature scraper conveyor through the microsphere regulating valve, and transported to an end away from the steam generating device through the low-temperature scraper conveyor; The conveying direction of the rear medium-temperature scraper conveyor is opposite to that of the low-temperature scraper conveyor; and the front end of the rear medium-temperature scraper conveyor is connected to the bottom end of the medium-temperature bucket elevator; the rear medium-temperature scraper conveyor can receive the ceramic microspheres flowing out of the low-temperature scraper conveyor through the heat absorption structure, and convey the ceramic microspheres to the bottom end of the medium-temperature bucket elevator; A microball metering device is provided at the upper end of the medium-temperature bucket elevator; and the ceramic microballs are released onto the front medium-temperature scraper conveyor through the microball metering device, and are transported to an end away from the medium-temperature bucket elevator through the front medium-temperature scraper conveyor; The high-temperature scraper conveyor has a conveying direction opposite to that of the front medium-temperature scraper conveyor; and the rear end of the front medium-temperature scraper conveyor is connected to the bottom end of the high-temperature bucket elevator; the high-temperature scraper conveyor can receive the ceramic microspheres released by the front medium-temperature scraper conveyor based on the microsphere regulating valve and flowing out through the heat absorption structure, and convey the ceramic microspheres toward the bottom end of the high-temperature bucket elevator; The microball distributor is provided at the top of the high-temperature bucket elevator, and the high-temperature bucket elevator can lift the ceramic microballs received at the bottom upward, transport them to the microball distributor, and transport them to the upper opening of the steam generating device through the microball distributor.

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