A high-temperature slag treatment system

Abstract

This invention discloses a high-temperature molten slag treatment system. The molten slag material system includes multiple molds, a slag conveying device, and an insulated sealing cover. The slag conveying device includes a conveying chain arranged in a ring. The insulated sealing cover at least surrounds the outer periphery of the molds on the upper side of the conveying chain and divides the system into multiple temperature zones along the conveying direction. The water-cooling system includes multiple water-cooled walls, a steam drum, and a heat storage tank. Each temperature zone has at least one water-cooled wall, which is connected to the steam drum via supply and return water pipes. The steam drum's outlet is connected to the heat storage tank. The air-cooling system's supply air duct is connected to the downstream temperature zone along the conveying direction, and its return air duct is connected to the upstream temperature zone along the conveying direction. Adjacent temperature zones are also connected. Applying this solution can effectively recover the waste heat from the molten slag while reasonably mitigating water waste and environmental pollution.

Description

Technical Field

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

[0002] The metal smelting industry generates a large amount of waste heat and energy during production. Among them, high-temperature liquid slag, a byproduct of steel production, is discharged at temperatures as high as 1500℃ and contains a large amount of high-temperature waste heat, which has not yet been effectively recovered and utilized.

[0003] Currently, the most common process for treating smelting slag is water quenching. This rapid cooling process produces slag with a high glass content, which, based on its potential hydration activity, is widely used in building materials such as cementitious admixtures and concrete additives. However, this technology has the following three problems: First, the "water quenching method" consumes a large amount of water resources. In order to ensure that the slag and cooling water are in full contact, there are certain requirements for the amount of slag flushing water used. At the same time, during the contact between water and high-temperature slag, a large amount of water is also lost through evaporation.

[0004] Second, the water quenching process is accompanied by the emission of acidic gaseous pollutants such as SO2 and H2S, which are dissipated into the air with water vapor, forming secondary pollution.

[0005] Third, the high-quality sensible heat contained in the high-temperature slag has not been effectively recovered and utilized, resulting in huge energy waste.

[0006] In view of this, there is an urgent need to propose effective solutions for the recovery and utilization of waste heat from high-temperature liquid slag in order to overcome the problems of environmental pollution and water waste. Summary of the Invention

[0007] To address the aforementioned technical problems, this invention provides a high-temperature molten slag treatment system that can effectively recover waste heat from molten slag while reasonably mitigating water waste and environmental pollution.

[0008] The high-temperature molten slag processing system provided by this invention includes a molten slag material system, a water cooling system, and an air cooling system. The molten slag material system includes multiple molds, a slag conveying device, and an insulating sealing cover. The slag conveying device includes a conveying chain arranged in a ring. The multiple molds are sequentially arranged along the outer periphery of the conveying chain. The insulating sealing cover at least surrounds the outer periphery of the molds on the upper side of the conveying chain and is divided into multiple temperature zones along the conveying direction. The water cooling system includes multiple water-cooled walls, a steam drum, and a heat storage tank. At least one water-cooled wall is provided in each temperature zone. The water-cooled wall can be connected to the outlet and first inlet of the steam drum through a water supply pipe and a return pipe, respectively. The steam outlet of the steam drum is connected to the heat storage tank. The air cooling system includes an air supply pipe and a return air pipe. The air supply pipe is connected to the temperature zone located downstream along the conveying direction, and the return air pipe is connected to the temperature zone located upstream along the conveying direction. Adjacent temperature zones are connected to each other.

[0009] Optionally, the heat-insulating sealing cover includes an outer cover and a hot air cover. The hot air cover surrounds the outer periphery of the mold on the upper side of the conveyor chain and forms the multiple temperature zones. The outer cover covers the mold on the lower side of the conveyor chain and the molds at both ends of the conveyor chain, and is fixedly connected to the hot air cover. A feeding port is provided on one side of the outer cover, and a hopper is provided on the other side of the outer cover.

[0010] Optionally, the slag material system further includes a water-cooled flat roller, which is located on the side of the hot air hood near the feed port and above the mold; the internal flow channel of the water-cooled flat roller is connected between the water supply pipeline and the return water pipeline, forming the first water-cooled heat exchange branch of the water-cooling system.

[0011] Optionally, multiple water-cooled flat rollers are provided, and the multiple water-cooled flat rollers are spaced apart along the conveying direction.

[0012] Optionally, the plurality of temperature ranges include a high-temperature range, a medium-temperature range, and a low-temperature range. The water-cooled wall provided in the high-temperature range is a high-temperature section water-cooled wall, the water-cooled wall provided in the medium-temperature range is a medium-temperature section water-cooled wall, and the water-cooled wall provided in the low-temperature range is a low-temperature section water-cooled wall.

[0013] Optionally, the high-temperature section water-cooled wall includes a lower high-temperature section water-cooled wall and an upper high-temperature section water-cooled wall. The lower high-temperature section water-cooled wall is located below the mold in the high-temperature zone, and the upper high-temperature section water-cooled wall is located above the mold in the high-temperature zone. The medium-temperature section water-cooled wall is located above the mold in the medium-temperature zone, and the low-temperature section water-cooled wall is located above the mold in the low-temperature zone.

[0014] Optionally, the upper water-cooled wall of the high-temperature section is connected between the water supply pipeline and the return water pipeline to form a second water-cooled heat exchange branch of the water-cooling system; the lower water-cooled wall of the high-temperature section and the water-cooled wall of the medium-temperature section are connected in series between the water supply pipeline and the return water pipeline to form a third water-cooled heat exchange branch of the water-cooling system; and the water-cooled wall of the medium-temperature section is connected between the water supply pipeline and the return water pipeline to form a fourth water-cooled heat exchange branch of the water-cooling system.

[0015] Optionally, the slag material system further includes an auxiliary slag crushing device, which is disposed in the medium-temperature zone and / or the low-temperature zone, and the crushing teeth of the auxiliary slag crushing device are disposed toward the mold cavity of the casting mold.

[0016] Optionally, the auxiliary crushing device further includes a lifting device, wherein the crushing teeth are disposed on the lifting device and can reciprocate under the drive of the lifting device.

[0017] Optionally, the air inlet and air outlet of the temperature range are located on the same side wall of the hot air hood, with the air inlet located below the mold within the temperature range and the air outlet located above the mold within the temperature range. A flow-blocking component is provided on the side where the air inlet and the air outlet are located, which can prevent the circulating air from flowing directly to the air outlet. Correspondingly, the heat-insulating sealing cover has a flow passage between its other side wall away from the air inlet and the air outlet and the mold within the temperature range.

[0018] Optionally, the flow-blocking component is fixedly disposed on the side wall of the heat-insulating sealing cover between the air inlet and the air outlet, and extends to the side of the mold within the temperature range.

[0019] Optionally, the water cooling system further includes a deaerator, a low-pressure economizer, and a high-pressure economizer. The first inlet of the deaerator is connected to a demineralized water source, the first outlet of the deaerator is connected to the inlet of the low-pressure economizer, the outlet of the low-pressure economizer is connected to the second inlet of the deaerator, the second outlet of the deaerator is connected to the inlet of the high-pressure economizer, and the outlet of the high-pressure economizer is connected to the second inlet of the steam drum.

[0020] Optionally, the steam outlet of the steam drum is also connected to the auxiliary steam inlet of the deaerator.

[0021] Optionally, the water cooling system further includes a demineralized water tank, which is a demineralized water source connected to the first inlet of the deaerator.

[0022] Optionally, the return air duct is connected to the air inlet of the high-pressure economizer, the air outlet of the high-pressure economizer is connected to the air inlet of the low-pressure economizer, and the air outlet of the low-pressure economizer is connected to the air supply duct.

[0023] Optionally, the air-cooling system further includes a dust removal device and a fan, wherein the dust removal device and the fan are sequentially installed on the pipeline between the air outlet of the low-pressure economizer and the return air duct.

[0024] Optionally, the return air duct is provided with an emergency air inlet.

[0025] To address the waste heat recovery of high-temperature molten slag, this solution proposes a novel multi-effect energy-saving system for high-temperature molten slag treatment. Specifically, the molten slag material system includes multiple molds, a slag conveying device, and an insulated sealing cover. The slag conveying device includes a conveying chain arranged in a ring. Multiple molds are sequentially arranged along the outer periphery of the conveying chain. The insulated sealing cover at least surrounds the outer periphery of the molds on the upper side of the conveying chain and is divided into multiple temperature zones along the conveying direction. At least one water-cooled wall is provided in each temperature zone. The water-cooled wall can be connected to the outlet and first inlet of the steam drum through water supply and return pipes, respectively, and the steam outlet of the steam drum is connected to the heat storage tank. The air supply pipe is connected to the temperature zone located downstream along the conveying direction, and the return air pipe is connected to the temperature zone located upstream along the conveying direction, with adjacent temperature zones connected separately. Compared with existing technologies, this solution utilizes a combination of segmented water-cooled radiative heat transfer and air-cooled convective heat transfer to effectively enhance molten slag heat transfer, ensuring that the molten slag is reduced to a brittle temperature, achieving full recovery of waste heat, and guaranteeing the safe operation of downstream rotating equipment. Applying the high-temperature molten slag treatment system provided in this application embodiment, based on efficient heat exchange, molten slag cooling eliminates the need for water spraying, saving water consumption and avoiding fog and dust pollution formed by low-temperature water spraying on the high-temperature slag surface, achieving multiple benefits such as energy saving and environmental protection.

[0026] In addition, this solution ensures sufficient heat exchange between the circulating air and the high-temperature molten slag through cross-countercurrent heat exchange in the above temperature ranges, effectively improving the waste heat recovery efficiency of the high-temperature molten slag.

[0027] In addition, this solution places the high-temperature molten slag in the slag bag into multiple continuous molds, which can ensure that the high-temperature molten slag is evenly distributed on the surface of each mold, increase the heat exchange area for heat dissipation of the high-temperature molten slag, reduce the impact of slag skin formed by the high-temperature molten slag during heat dissipation on heat exchange, and provide technical support for achieving full heat exchange and improving the waste heat recovery efficiency of the high-temperature molten slag.

[0028] In an optional embodiment of the present invention, the slag material system further includes a water-cooled flat roller, which is located on the side of the hot air hood near the feed port and positioned above the mold. The internal flow channel of the water-cooled flat roller is connected between the water supply pipe and the return water pipe, forming the first water-cooled heat exchange branch of the water-cooling system. With this configuration, as the molds carrying high-temperature slag pass sequentially through the water-cooled flat roller, the high-temperature slag in each mold can exchange heat with the circulating water in the water-cooled flat roller, pre-absorbing the heat from the high-temperature slag. Simultaneously, the outer circumferential roller of the water-cooled flat roller also serves as a height limiter, flattening excessive or excessively high-temperature slag in localized areas of the mold and limiting the high-temperature slag within the mold to a fixed height, thus preventing uneven material distribution in the feeding chute from causing the high-temperature slag to overflow or bulge within the mold. This effectively prevents overflowing or bulging high-temperature slag from entering the hot air hood and causing coking when it comes into contact with the downstream water-cooled wall surface.

[0029] In another alternative embodiment of the present invention, the multiple temperature ranges include a high-temperature range, a medium-temperature range, and a low-temperature range. The upper water-cooled wall of the high-temperature section is connected between the water supply pipeline and the return water pipeline to form a second water-cooled heat exchange branch. The lower water-cooled wall of the high-temperature section and the water-cooled wall of the medium-temperature section are connected in series between the water supply pipeline and the return water pipeline to form a third water-cooled heat exchange branch. The water-cooled wall of the medium-temperature section is connected between the water supply pipeline and the return water pipeline to form a fourth water-cooled heat exchange branch of the water-cooling system. This setup has several advantages. First, the parallel piping of each branch ensures that the steam-water mixture formed in each branch can be separated in a timely manner, effectively preventing "steam blockage" from affecting the flow of circulating water. Second, the series connection of the lower water-cooled wall in the high-temperature section and the water-cooled wall in the medium-temperature section fully utilizes the heat of the molten slag above the mold, resulting in a higher vaporization rate of the reflux circulating water and improving the efficiency of high-quality heat energy recovery. Furthermore, the fourth water-cooled heat exchange branch formed by the water-cooled wall in the low-temperature section further recovers the waste heat of the molten slag in the low-temperature zone through the water-cooling system, maximizing the recovery of waste heat of the molten slag in different temperature ranges.

[0030] In another optional embodiment of the present invention, the air inlets and outlets for each temperature zone are located on the same side wall of the hot air hood, with the air inlets located below the mold within the temperature zone and the air outlets located above the mold within the temperature zone. A flow-blocking component is provided on the side where the air inlets and outlets are located, preventing the circulating air from flowing directly to the outlets. Correspondingly, the heat-insulating sealing cover has a flow channel on the other side wall away from the air inlets and outlets, and a flow channel between it and the mold within the temperature zone. With this configuration, after the circulating air enters through the air inlet, it first passes through the bottom space of the mold to reach the side where the flow channel is located, and then flows around to the upper space of the mold. The circulating air then sweeps laterally across the high-temperature molten slag inside the mold, cooling the molten slag. The heated circulating air then flows out of the low-temperature zone through the air outlet. Compared to air cooling methods that directly spray air onto the surface of high-temperature molten slag, the circulating air in this solution flows roughly along a serpentine duct after entering the temperature range, and then sweeps horizontally across the molten slag surface above the mold for convective heat transfer. This avoids creating counter-current airflow that would reduce surface wind speed and affect heat transfer efficiency. Simultaneously, it avoids exerting force on the surface of the high-temperature molten slag, preventing dust formation and ensuring stable and reliable operation of the downstream fan. Overall, based on the water-cooled zonal radiation and air-cooled convective heat transfer mechanism, the heat exchange duration can be increased, achieving sufficient and rapid absorption of heat from the high-temperature molten slag. Attached Figure Description

[0031] Figure 1 A process diagram of a high-temperature slag treatment system provided in this application embodiment; Figure 2 for Figure 1 A schematic diagram of the overall structure of the slag material system shown in the figure; Figure 3 for Figure 2 The diagram shows the assembly relationship of the thermal insulation sealing cover and its internal components. Figure 4 A schematic diagram of a water cooling system provided in an embodiment of this application; Figure 5 A front view of an auxiliary slag crushing device provided in an embodiment of this application; Figure 6 for Figure 5 Side view; Figure 7 A schematic diagram of an air-cooled system provided in an embodiment of this application; Figure 8 for Figure 3 FF section view in the image.

[0032] In the picture: The slag material system includes: 10, feeding device 101, feeding chute 102, heat-insulating sealing cover 103, outer cover 1031, hot air cover 1032, first air inlet 10321, first air outlet 10322, second air inlet 10323, second air outlet 10324, third air inlet 10325, third air outlet 10326, feeding hopper 1033, casting mold 104, water-cooled flat roller 105, auxiliary slag crushing device 106, lifting device 1061, slag crushing teeth 1062, slag conveying device 107, conveying chain 1071, driving sprocket 1072, driven sprocket 1073, flow obstruction component 108, vibrating feeder 109, slag crushing device 110, and slag storage bin 111. Water cooling system 20, lower water-cooled wall of high temperature section 201, upper water-cooled wall of high temperature section 202, water-cooled wall of medium temperature section 203, water-cooled wall of low temperature section 204, water supply pipeline 205, water return pipeline 206, steam drum 207, deaerator 208, heat storage tank 209, low-pressure economizer 210, high-pressure economizer 211, demineralized water tank 212, first water pump 213, second water pump 214, third water pump 215, fourth water pump 216; Air-cooled system 30, air supply duct 301, return air duct 302, dust removal equipment 303, fan 304, emergency air inlet 305; Control system 40. Detailed Implementation

[0033] 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.

[0034] Please see Figure 1 This figure is a process diagram of a high-temperature slag treatment system provided in an embodiment of this application.

[0035] The high-temperature molten slag processing system includes a molten slag material system 10, a water cooling system 20, an air cooling system 30, and a control system 40. The control system 40 is used to control the operation of the molten slag material system 10, the water cooling system 20, and the air cooling system 30. In its implementation, it can output corresponding control signals in real time based on the detection signals fed back during the operation of each system, ensuring continuous and stable operation of the system. For simplicity, the signal transmission lines between the control system 40 and each system are not shown in the diagram. Figure 1 As shown in the image.

[0036] Please see also Figure 2 The image is Figure 1 The diagram shows the overall structure of the slag material system.

[0037] The slag material system 10 includes a feeding device 101, a feeding chute 102, an insulated sealing cover 103, a casting mold 104, a water-cooled flat roller 105, an auxiliary slag crushing device 106, a slag conveying device 107, a flow obstruction component 108, a vibrating feeder 109, a slag crushing device 110, and a slag storage bin 111.

[0038] Combination Figure 1 and Figure 2 As shown, according to the process flow of molten slag, after the high-temperature molten slag is transferred out of the blast furnace, it enters the feeding device 101 and is transported to the casting mold 104 in the heat insulation and sealing cover 103 through the feeding chute 102. Driven by the slag conveying device 107, each casting mold 104 passes through the air-cooled and water-cooled integrated heat exchange zone in the heat insulation and sealing cover 103 in sequence, and the high-temperature molten slag can be converted into low-temperature solid slag. In the discharge zone E, the low-temperature solid slag passes through the discharge hopper 1033 and is then crushed into small particles by the vibrating feeder 109 and the slag crushing device 110 in sequence, and stored in the slag storage bin 111.

[0039] The feeding device 101 can be a hydraulic feeding device. In practice, by controlling the force on each support shaft of the hydraulic arm, the slag pot of the feeding device 101 is tilted at a certain angle, causing the molten slag inside the slag pot to be poured outwards onto the side of the feeding chute 102. Here, by controlling the tilt angle of the slag pot of the hydraulic feeding device, the actual feeding speed of each mold can be adjusted, ensuring that the slag casting machine maintains a continuous working state, realizing the continuous heat supply of the high-temperature molten slag efficient waste heat recovery system, and thus ensuring the continuous and stable operation of the system.

[0040] In other possible implementations, the feeding device 101 may also be of other structural forms according to the overall design requirements, and is not limited to a hydraulic feeding device. The embodiments in this application are not limited.

[0041] The slag conveying device 107 is located inside the insulated sealing cover 103. Please refer to the following: Figure 3 The image is Figure 2 The diagram shows the assembly relationship of the thermal insulation sealing cover and its internal components.

[0042] Combination Figure 2 and Figure 3 As shown, the slag conveying device 107 is a chain conveying device. Multiple molds 104 are sequentially arranged around the outer periphery of the conveying chain 1071. In the conveying direction, the two ends of the conveying chain 1071, which is arranged in a ring shape, are respectively fitted onto the driving sprocket 1072 and the driven sprocket 1073. The driving sprocket 1072 is driven by the driving shaft, and the driven sprocket 1073 is driven by the driven shaft.

[0043] In a specific implementation, the drive component (not shown in the figure) can drive the drive shaft to rotate, which in turn drives the conveyor chain 1071 to move via the drive sprocket 1072. The driven sprocket 1073 moves simultaneously to maintain the stable conveying function of the slag conveying device 107. Here, the output speed of the drive component can be coordinated with the tilting and feeding speed on the feeding device 101 side to control the amount of molten slag distributed in the mold 104, thus ensuring the continuous operation of the slag casting machine.

[0044] Among them, the mold 104 located on the upper side of the conveyor chain 1071, after passing through the integrated heat exchange zone, transforms the high-temperature molten slag it carries into low-temperature solid slag and is discharged in the discharge zone; correspondingly, the mold 104 located on the lower side of the conveyor chain 1071 is in an unloaded state, and after moving to the upper side with the conveyor chain, it can carry and transport high-temperature molten slag in a cyclic manner.

[0045] In this embodiment, the thermal insulation sealing cover 103 includes an outer cover 1031 and a hot air cover 1032. The hot air cover 1032 surrounds the outer periphery of the mold 104 on the upper side of the conveyor chain 1071 and is divided into multiple temperature zones along the conveying direction to form a multi-stage waste heat recovery zone. Here, the separation of each temperature zone is not limited to an absolute sealing state. In specific implementation, the corresponding separation structure can minimize the interconnection between adjacent temperature zones while ensuring reliable conveying of the mold 104. The outer cover 1031 covers the mold on the lower side of the conveyor chain 1071 and the molds 104 at both ends, and is fixedly connected to the hot air cover 1032 to form the thermal insulation sealing cover 103. Furthermore, a feed port 1034 is provided on the feeding side of the outer cover 1031, through which the feeding chute 102 extends; a discharge hopper 1033 is provided on the discharge side of the outer cover 1031.

[0046] The water-cooled flat roller 105 is located on the side of the hot air hood 1032 near the feed port and is positioned above the mold 104. For example... Figure 3 As shown, three water-cooled flat rollers 105 form a water-cooled flat roller area A on the side of the hot air hood 1032 near the feed port. Each water-cooled flat roller 105 is circulated with water from the water-cooling system 20. When the mold 104 carrying high-temperature molten slag passes through the water-cooled flat roller area A, the high-temperature molten slag in each mold 104 can exchange heat with the circulating water in the water-cooled flat roller 105, pre-absorbing the heat from the high-temperature molten slag. Simultaneously, the outer periphery of the water-cooled flat roller 105 also serves as a height limiter, flattening excessive or excessively high-temperature molten slag in localized areas of the mold 104, limiting the high-temperature molten slag in the mold 104 to a fixed height. This prevents uneven material distribution in the feeding chute 102 from causing the high-temperature molten slag in the mold 104 to overflow or bulge. This effectively prevents overflowing or bulging high-temperature molten slag from entering the hot air hood 1032 and causing coking when it comes into contact with the downstream water-cooled wall surface.

[0047] In practice, a certain distance is required between the water-cooled flat roller 105 and the mold 104 to avoid collisions between them during the conveying process. At the same time, a smaller distance is used between them to increase the heat pre-absorption efficiency of the water-cooled flat roller 105 and to reasonably control the height of the high-temperature molten slag inside the mold 104.

[0048] In other possible implementations, depending on the spatial configuration requirements of different application scenarios, the water-cooled flat roller 105 in the water-cooled flat roller area A can be set to one or more other types. This application does not limit the implementation.

[0049] To clearly describe the waste heat recovery principle of each temperature zone within the hot air hood 1032, without loss of generality, the hot air hood 1032 shown in the figure includes three temperature zones divided along the conveying direction: high temperature zone B, medium temperature zone C, and low temperature zone D, and these three temperature zones are used as examples for illustration.

[0050] Driven by the slag conveying device 107, the high-temperature molten slag in each mold 104 sequentially passes through the water-cooled flat roller zone A, high-temperature zone B, medium-temperature zone C, and low-temperature zone D, finally entering the discharge zone E. Within the heat-insulating sealing cover 103, the high-temperature zone B, medium-temperature zone C, and low-temperature zone D can achieve comprehensive heat exchange through the water-cooling system 20 and the air-cooling system 30, respectively. In practice, the molten slag temperature can be reduced from 1200℃~1300℃ for the high-temperature molten slag on the feeding side to 200℃~300℃ for the low-temperature solid slag on the discharge side.

[0051] For the water-cooling system 20, water-cooled walls are respectively installed in the high-temperature zone B, the medium-temperature zone C, and the low-temperature zone D inside the thermal insulation and sealing cover 103. That is to say, each temperature zone has an independently configured water-cooled wall, and the circulating water of the water-cooling system 20 is introduced into each zone to achieve staged water-cooled heat exchange.

[0052] In practice, the forms of the high-temperature section water-cooled wall, the medium-temperature section water-cooled wall, and the low-temperature section water-cooled wall can be selected according to needs. For example, but not limited to, multiple rows of steel pipes are arranged sequentially to form the water-cooling system; the multiple rows of steel pipes of each water-cooled wall are connected to the circulating water circuit of the water-cooling system 20 through common inlet and outlet water pipes.

[0053] In other specific implementations, an upper water-cooled wall and a lower water-cooled wall can be provided as needed within each temperature range. The upper water-cooled wall is positioned above the mold 104. Furthermore, in the circulating water path of the water-cooling system 20, the water-cooled walls (the upper and / or lower water-cooled walls of each temperature range) can be connected in series, in parallel, or in a combination of series and parallel connections as needed. This application does not limit the specific implementation.

[0054] Please see also Figure 1 , Figure 3 and Figure 4 ,in, Figure 4 This is a schematic diagram of a water cooling system provided in an embodiment of this application.

[0055] In this embodiment, the high-temperature water-cooled wall in the high-temperature zone B includes a lower high-temperature water-cooled wall 201 and an upper high-temperature water-cooled wall 202. The lower high-temperature water-cooled wall 201 is located below the mold 104, and the upper high-temperature water-cooled wall 202 is located above the mold 104, so as to fully exchange and recover the heat of the molten slag in each mold 104 in the high-temperature zone B. A medium-temperature water-cooled wall 203 is provided in the medium-temperature zone C, and a low-temperature water-cooled wall 204 is provided in the low-temperature zone D. Both the medium-temperature water-cooled wall 203 and the low-temperature water-cooled wall 204 are located above their respective temperature ranges.

[0056] Compared to the high-temperature zone B on the upstream side, the temperatures in the medium-temperature zone C and low-temperature zone D on the downstream side gradually decrease. Water-cooled walls can be provided only above the mold 104 according to the corresponding temperature changes. Of course, in other possible implementations, water-cooled walls can also be provided below the mold 104 in each temperature range on the downstream side; this application embodiment does not limit this. Here, "upstream side" and "upstream" refer to the conveying direction along the mold 104 within the insulation sealing cover 103. Relatively speaking, the side closer to the feed port is the upstream side, and the side closer to the discharge port is the downstream side. It should be understood that the use of the above directional terms is only for clearly describing the relative positional relationship of the system configuration and does not constitute a substantial limitation on the technical solution claimed in this application.

[0057] Overall, the water-cooled flat roller 105, the high-temperature section water-cooled wall (lower high-temperature section water-cooled wall 201, upper high-temperature section water-cooled wall 202), the medium-temperature section water-cooled wall 203, and the low-temperature section water-cooled wall 204 are all connected to the pipelines of the water-cooling system 20 so that circulating water can be introduced into them respectively.

[0058] Among them, the water-cooled flat roller 105 in water-cooled flat roller area A is the first water-cooled heat exchange branch of the water-cooling system, the upper water-cooled wall 202 in the high-temperature section of high-temperature area B is the second water-cooled heat exchange branch of the water-cooling system, the lower water-cooled wall 201 in the high-temperature section of high-temperature area B and the water-cooled wall 203 in the medium-temperature section of medium-temperature area C are connected in series to form the third water-cooled heat exchange branch of the water-cooling system, and the water-cooled wall 203 in the medium-temperature section of medium-temperature area C is the fourth water-cooled heat exchange branch of the water-cooling system. All water-cooled heat exchange branches are connected in parallel between the water supply pipe 205 and the return pipe 206 of the water-cooling system 20.

[0059] With this configuration, in the first water-cooled heat exchange branch constructed in the water-cooled flat roller zone A and the second water-cooled heat exchange branch constructed in the high-temperature zone B, the circulating water can be heated to a steam-water mixture, and then returned to the steam drum 207 via the return water pipe 206 for steam-water separation. The heat radiation below the mold 104 in the high-temperature zone B is lower than the heat radiation above it. The circulating water flowing through the lower water-cooled wall 201 of the high-temperature section via the water supply pipe 205 is in a state of unvaporization or low vaporization rate. Based on the configuration of the third water-cooled heat exchange branch, the circulating water that has completed heat exchange from the lower water-cooled wall 201 of the high-temperature section flows into the medium-temperature section water-cooled wall 203 of the medium-temperature zone C for further heat exchange and temperature increase. The circulating water can be heated to a steam-water mixture and also returned to the steam drum 207 via the return water pipe 206 for steam-water separation.

[0060] On the one hand, based on the parallel pipeline setup of each branch in this scheme, the steam-water mixture formed by each branch can be separated from the steam in a timely manner, which can effectively prevent the "steam blockage" phenomenon from affecting the flow of circulating water. On the other hand, based on the series connection of the lower water-cooled wall 201 in the high-temperature section and the water-cooled wall 203 in the medium-temperature zone C, the heat of the molten slag above the mold 104 is fully utilized, and the vaporization rate of the return circulating water is high, which can improve the recovery efficiency of high-quality heat energy. On this basis, the fourth water-cooled heat exchange branch formed by the water-cooled wall 204 in the low-temperature section further recovers the waste heat of the molten slag in the low-temperature zone D through the water-cooling system, so as to maximize the recovery of waste heat of molten slag in different temperature ranges.

[0061] like Figure 3 and Figure 4 As shown, after the high-temperature molten slag in each mold 104 passes through the high-temperature zone B and the medium-temperature zone C and undergoes sufficient heat exchange, the surface temperature of the high-temperature molten slag has been effectively reduced, for example, but not limited to, to around 800°C, and a certain degree of slag skin has formed on the surface. In order to avoid the slag skin affecting the internal heat exchange efficiency, auxiliary slag breaking devices 106 can be set in the medium-temperature zone C and the low-temperature zone D according to the location of slag skin formation.

[0062] For example, the auxiliary slag breaking device 106 is located in the medium-temperature zone C near the low-temperature zone D, and is used to break up the slag skin on the surface of the high-temperature molten slag, so that the heat inside the high-temperature molten slag can be smoothly conducted outward. Please refer to [further details omitted]. Figure 5 and Figure 6 ,in, Figure 5 This is a front view of an auxiliary slag crushing device provided in an embodiment of this application. Figure 6 for Figure 5 Side view.

[0063] like Figure 5 and Figure 6As shown, the auxiliary slag crushing device 106 includes a lifting device 1061 and slag crushing teeth 1062 disposed on the lifting device 1061. The lifting device 1061 can be a hydraulic lifting device. As the lifting device 1061 moves up and down reciprocatingly, it can drive the slag crushing teeth 1062 to move up and down synchronously and periodically. In this way, in conjunction with the conveying speed of the mold 104, the reciprocating motion can hammer the surface of the medium-low temperature molten slag inside the mold 104, forming several holes on the surface of the medium-low temperature molten slag, thereby breaking the slag skin inside the mold 104 and allowing the high temperature heat inside the molten slag to be transferred out smoothly.

[0064] In a specific implementation, multiple auxiliary crushing devices 106 may be configured and sequentially arranged in the medium-temperature zone C and the low-temperature zone D. This application embodiment does not limit the specific implementation.

[0065] Additionally, the auxiliary slag-breaking device 106 shown in the figure is inserted into the hot air shroud 1032. In a specific implementation, the auxiliary slag-breaking device 106 can also be completely housed within the hot air shroud 1032. In other possible implementations, the auxiliary slag-breaking device 106 can also adopt other structural forms, as long as it allows the surface of the medium- and low-temperature molten slag to form several holes. This application does not limit the embodiments.

[0066] For example Figure 1 and Figure 4 As shown in this embodiment, the water cooling system 20 further includes a deaerator 208, a heat storage tank 209, a low-pressure economizer 210, a high-pressure economizer 211, and a demineralized water tank 212. The demineralized water tank 212 is connected to the first inlet of the deaerator 208; the first outlet of the deaerator 208 is connected to the inlet of the low-pressure economizer 210; the outlet of the low-pressure economizer 210 is connected to the second inlet of the deaerator 208; the second outlet of the deaerator 208 is connected to the inlet of the high-pressure economizer 211; the outlet of the high-pressure economizer 211 is connected to the second inlet of the steam drum 207; the first inlet of the steam drum 207 is connected to the return water pipeline 206; the outlet of the steam drum 207 is connected to the supply water pipeline 205; the steam outlet of the steam drum 207 is connected to the heat storage tank 209 and the auxiliary steam inlet of the deaerator 208.

[0067] Following the flow direction of the demineralized water, the circulating water of the water-cooling system 20 is replenished by external demineralized water. The demineralized water enters the demineralized water tank 212, where it is pumped by the first water pump 213 into the deaerator 208 for gas-water separation. This prevents oxygen from precipitating out after heating, which could lead to corrosion and vibration of the heat exchanger. After deoxygenation, the demineralized water is pumped by the second water pump 214 into the low-pressure economizer 210 for preliminary heating using circulating air, for example, but not limited to heating to 130℃~150℃. The heated demineralized water is then returned to the deaerator 208 for further deoxygenation. After further deoxygenation, the medium-temperature demineralized water at 130℃~150℃ is pumped by the third water pump 215 into the high-pressure economizer 211, where it is further heated by high-temperature circulating air to a steam-water mixture of approximately 180℃~200℃ before entering the steam drum 207 for steam-water separation. The steam separated from the steam drum 207 can be stored in the heat storage tank 209 for later use and transported to the deaerator 208 as auxiliary heating steam. The water separated from the steam drum 207 can be sent by the fourth water pump 216 installed on the water supply pipeline 205 to each water-cooled heat exchange branch, where it is heated in the water-cooled flat roller 105, the lower water-cooled wall 201 of the high-temperature section, the upper water-cooled wall 202 of the high-temperature section, the water-cooled wall 203 of the medium-temperature section, and the water-cooled wall 204 of the low-temperature section. After heat exchange to form a steam-water mixture, it is returned to the steam drum 207 for steam-water separation. The water after steam-water separation is returned to each water-cooled heat exchange branch for reheating. This cycle is repeated through the water-cooling system 20 to achieve waste heat recovery.

[0068] It should be noted that, in other possible implementations, the demineralized water tank 212 can be an optional system configuration, and the external demineralized water can be directly supplied to the water cooling system 20. That is to say, the demineralized water source connected to the deaerator can be the demineralized water tank 212, or it can be an external demineralized water source.

[0069] Alternatively, any one of the first water pump 213, the second water pump 214, the third water pump 215, and the fourth water pump 216 can be selectively configured in the system, as long as it can meet the requirement of reliable transportation of circulating water. This application does not limit the specific implementation of the embodiments.

[0070] For the air-cooled system 30, low-temperature circulating air (e.g., but not limited to 110℃~140℃) is sequentially delivered through its air supply duct 301 into the low-temperature zone D, medium-temperature zone C, and high-temperature zone B of the insulation sealing cover 103. After multi-stage heat exchange and temperature increase, the high-temperature circulating air (e.g., but not limited to nearly 300℃) is delivered through its return air duct 302 to the high-pressure economizer 211 and the low-pressure economizer 210, realizing the reuse of the recovered heat from the air cooling system. Please refer to [further details to be added]. Figure 1 and Figure 7 ,in, Figure 7 This is a schematic diagram of an air-cooled system provided in an embodiment of this application.

[0071] The air inlets and outlets for each temperature zone (low-temperature zone D, medium-temperature zone C, and high-temperature zone B) are located on the same side of the insulation sealing cover 103, with the air inlets located below the mold for that temperature zone and the air outlets located below the mold. Please refer to [further details]. Figure 8 The image is Figure 3 FF section view in the image.

[0072] The following is based on Figure 8 The air duct of the low-temperature zone D shown is used as an example to illustrate the flow path of the circulating air within the corresponding temperature range. The first air inlet 10321 of the low-temperature zone D is located below the mold 104 inside the insulation sealing cover 103, and the first air outlet 10322 of the low-temperature zone D is located above the mold 104 inside the insulation sealing cover 103. A flow-blocking component 108 is disposed on the side where the first air inlet 10321 and the first air outlet 10322 are located. For example, but not limited to, the flow-blocking component 108 can be fixedly disposed on the side wall of the insulation sealing cover 103 between the first air inlet 10321 and the first air outlet 10322, and extend to the side of the mold 104 to prevent the circulating air from directly rising and exiting through the first air outlet 10322 after entering the temperature range.

[0073] In specific implementations, the flow-blocking component 108 can be implemented in different structural forms, such as, but not limited to, a plate-like structure, which is simple and reliable, and the manufacturing cost is controllable.

[0074] Meanwhile, the heat-insulating sealing cover 103 has a flow passage G between its other side wall, which is away from the first air inlet 10321 and the first air outlet 10322, and the mold 104 inside the heat-insulating sealing cover 103. In this way, after the circulating air enters through the first air inlet 10321, it can first reach the side where the flow passage G is located through the bottom space of the mold 104, and then the flow passage G goes around to the upper space of the mold 104. The circulating air sweeps horizontally over the high-temperature molten slag inside the mold 104 to cool the high-temperature molten slag. The heated circulating air flows out of the low-temperature zone D through the first air outlet 10322. Compared to air cooling methods that directly spray air onto the surface of high-temperature molten slag, the circulating air in this solution flows roughly along a serpentine duct after entering the temperature range and sweeps horizontally over the molten slag surface above the mold for convective heat transfer. This avoids the formation of counter-current airflow that would reduce surface wind speed and affect heat transfer. At the same time, it does not exert any force on the surface of the high-temperature molten slag, thus avoiding the possibility of dust formation on the slag surface and ensuring the stable and reliable operation of the downstream fan.

[0075] In a specific implementation, rollers can be provided on both sides of the mold 104, and a support rail 112 can be provided along the conveying direction so that the rollers on both sides of the mold 104 can move along the corresponding support rail 112. A support frame is provided below the support rail 112, and the support rail 112 is mounted on the crossbeam 113 of the support frame. In this way, the circulating air can bypass the bottom surface of the support rail 112 to establish an internal flow path. It is understood that the support frame can adopt different structural forms. In different application scenarios, those skilled in the art can determine the form according to the actual engineering needs, as long as the corresponding functional requirements are met.

[0076] Combined Figure 3 and Figure 7 As shown, after the circulating air flows out from the first air outlet 10322 of the low temperature zone D, it enters the medium temperature zone C through the second air inlet 10323. After heat exchange and temperature rise in the medium temperature zone C, the circulating air flows out from the second air outlet 10324 of the medium temperature zone C and enters the high temperature zone B through the third air inlet 10325. After heat exchange and temperature rise in the high temperature zone B again, the circulating air flows out from the third air outlet 10326 of the high temperature zone B.

[0077] It should be noted that flow-blocking components (not shown in the figure) are also provided in the medium-temperature zone C and high-temperature zone B of the thermal insulation sealing cover 103, and a flow channel (not shown in the figure) is provided between the side wall of the thermal insulation sealing cover 103 and the mold 104 on the opposite side. Based on this, the flow path of the circulating air in the medium-temperature zone C and high-temperature zone B is the same: first, it passes through the bottom space of the mold 104 to the side where the flow channel G is located, and then the flow channel G goes around to the upper space of the mold 104. The circulating air then sweeps across the high-temperature molten slag in the mold 104 laterally for convective heat transfer, cooling the high-temperature molten slag. Here, the flow path of the circulating air in the medium-temperature zone C and high-temperature zone B can be found in [reference needed]. Figure 8 As shown, it will not be elaborated further.

[0078] In the specific implementation, a first connecting pipe 10327 is provided between the first air outlet 10322 of the low-temperature zone D and the second air inlet 10323 of the medium-temperature zone C; a second connecting pipe 10328 is provided between the second air outlet 10324 of the medium-temperature zone C and the third air inlet 10325 of the high-temperature zone B. To simplify the drawing, the first connecting pipe 10327 and the second connecting pipe 10328 are indicated by dashed arrows in the figure. It should be understood that in actual engineering, the pipes can be laid out according to the actual situation of the assembly space.

[0079] In this embodiment, the air-cooled system 30 also includes a dust removal device 303 and a fan 304. The return air duct 302 is connected to the air inlet of the high-pressure economizer 211, the air outlet of the high-pressure economizer 211 is connected to the air inlet of the low-pressure economizer 210, and the air outlet of the low-pressure economizer 210 is connected to the air supply duct 301. The dust removal device 303 and the fan 304 are sequentially arranged on the pipeline between the air outlet of the low-pressure economizer 210 and the return air duct 302. In this way, after the low-temperature circulating air flows out of the air outlet of the low-pressure economizer 210, it is purified by the dust removal device 303. The clean low-temperature circulating air is then transported by the fan 304 to the first air inlet 10321 of the low-temperature zone D of the hot air hood 1032, and from there enters the bottom of the mold 104 for the above-mentioned circulating heat exchange.

[0080] The specific flow path of the circulating air during the heat exchange process is as follows: the first air inlet 10321 at the bottom of the low temperature zone D → the flow passage G of the low temperature zone D → the first air outlet 10322 at the top of the low temperature zone D → the second air inlet 10323 at the bottom of the medium temperature zone C → the flow passage G of the medium temperature zone C → the second air outlet 10324 at the top of the medium temperature zone C → the third air inlet 10325 at the bottom of the high temperature zone B → the flow passage G of the high temperature zone → the third air outlet 10326 at the top of the high temperature zone B → the high pressure economizer 211 → the low pressure economizer 210 → the dust removal equipment 303 → the fan 304 → the first air inlet 10321 at the bottom of the low temperature zone D.

[0081] For multiple temperature ranges, the air supply duct can be connected to the temperature range located downstream along the conveying direction, and the return air duct can be connected to the temperature range located upstream along the conveying direction, with adjacent temperature ranges connected respectively; thus, cross-counterflow heat exchange is achieved through the serpentine air ducts of the above-mentioned temperature ranges, ensuring sufficient heat exchange between the circulating air and the high-temperature molten slag, and improving the waste heat recovery efficiency of the high-temperature molten slag.

[0082] Optionally, to ensure the safe and reliable operation of the high-pressure economizer 211, an emergency air inlet 305 can be further provided on the return air duct 302. Cold air can be introduced through this emergency air inlet 305 to condition the high-temperature circulating air entering the high-pressure economizer 211. In other words, the high-temperature circulating air entering the high-pressure economizer 211 is adjusted to a suitable temperature, thereby preventing overpressure accidents in the circulating water within the high-pressure economizer 211 caused by excessive heat absorption by the circulating air in the slag material system 10.

[0083] Furthermore, the application control system 40 achieves efficient and energy-saving control of the molten slag material system 10, the water cooling system 20, and the air cooling system 30, ensuring continuous and stable system operation. Simultaneously, based on the configuration of the control system, it provides technical support for improving the efficiency of high-temperature molten slag waste heat recovery treatment. In specific implementation, the specific control strategies and parameter thresholds can be determined according to the overall requirements of the actual project, and will not be elaborated here.

[0084] In summary, the high-temperature molten slag treatment system provided in this application combines segmented water cooling and air cooling, effectively enhancing molten slag heat exchange, ensuring the molten slag is reduced to a brittle temperature, achieving full recovery of waste heat, and guaranteeing the safe operation of downstream rotating equipment. Applying the high-temperature molten slag treatment system provided in this application, based on efficient heat exchange, molten slag cooling eliminates the need for water spraying, saving water consumption and avoiding fog and dust pollution formed by low-temperature water spraying on the high-temperature slag surface, achieving multiple benefits such as energy saving and environmental protection.

[0085] Meanwhile, the high-temperature molten slag treatment system provided in this application embodiment can reduce the slag temperature at the outlet of the molten slag material system to a sufficiently low level based on efficient heat exchange, ensuring the brittleness of the outlet slag, and complete the granulation treatment of the slag through the slag crushing device at the slag outlet.

[0086] It should be noted that the feeding device 101, the feeding chute 102, the vibrating feeder 109, the slag crushing device 110, the slag storage bin 111, the steam drum 207, the deaerator 208, the heat storage device 209, the low-pressure economizer 210, the high-pressure economizer 211, and the dust removal equipment 303, etc., can be implemented using existing technologies, so they will not be described in detail here.

[0087] 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.

[0088] 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 high-temperature molten slag treatment system, characterized in that, This includes a slag material system, a water cooling system, and an air cooling system; The slag material system includes multiple molds, a slag conveying device, and a heat-insulating sealing cover. The slag conveying device includes a conveying chain arranged in a ring. The multiple molds are arranged sequentially along the outer periphery of the conveying chain. The heat-insulating sealing cover at least surrounds the outer periphery of the molds on the upper side of the conveying chain and is divided into multiple temperature zones along the conveying direction. The water cooling system includes multiple water-cooled walls, a steam drum, and a heat storage device. At least one water-cooled wall is provided in each temperature range. The water-cooled walls are connected to the outlet and the first inlet of the steam drum through a water supply pipeline and a water return pipeline, respectively. The steam outlet of the steam drum is connected to the heat storage device. The air-cooling system includes an air supply duct and a return air duct. The air supply duct is connected to the temperature range located at the downstream end along the conveying direction among the plurality of temperature ranges. The return air duct is connected to the temperature range located at the upstream end along the conveying direction among the plurality of temperature ranges, and adjacent temperature ranges are connected respectively. The heat-insulating sealing cover includes an outer cover body and a hot air cover. The outer cover body is fixedly connected to the hot air cover, and a feeding port is provided on one side of the outer cover body. The slag material system also includes a water-cooled flat roller, which is located on the side of the hot air hood near the feed port and is positioned above the mold; the internal flow channel of the water-cooled flat roller is connected between the water supply pipeline and the return water pipeline, forming the first water-cooled heat exchange branch of the water-cooling system. The multiple temperature ranges include a high temperature range, a medium temperature range, and a low temperature range. The water-cooled wall installed in the high temperature range is a high temperature section water-cooled wall, the water-cooled wall installed in the medium temperature range is a medium temperature section water-cooled wall, and the water-cooled wall installed in the low temperature range is a low temperature section water-cooled wall. The high-temperature section water-cooled wall includes a lower high-temperature section water-cooled wall and an upper high-temperature section water-cooled wall. The lower high-temperature section water-cooled wall is located below the mold in the high-temperature zone, and the upper high-temperature section water-cooled wall is located above the mold in the high-temperature zone. The medium-temperature section water-cooled wall is located above the mold in the medium-temperature zone, and the low-temperature section water-cooled wall is located above the mold in the low-temperature zone. The upper water-cooled wall of the high-temperature section is connected between the water supply pipeline and the return water pipeline, forming the second water-cooled heat exchange branch of the water-cooling system; the lower water-cooled wall of the high-temperature section and the water-cooled wall of the medium-temperature section are connected in series between the water supply pipeline and the return water pipeline, forming the third water-cooled heat exchange branch of the water-cooling system; the water-cooled wall of the medium-temperature section is connected between the water supply pipeline and the return water pipeline, forming the fourth water-cooled heat exchange branch of the water-cooling system.

2. The high-temperature slag treatment system according to claim 1, characterized in that, The hot air hood surrounds the outer periphery of the mold on the upper side of the conveyor chain and forms the multiple temperature zones. The outer cover covers the mold on the lower side of the conveyor chain and the molds at both ends of the conveyor chain. A hopper is provided on the other side of the outer cover.

3. The high-temperature slag treatment system according to claim 1, characterized in that, The water-cooled flat rollers are configured in multiple ways, and the multiple water-cooled flat rollers are spaced apart along the conveying direction.

4. The high-temperature slag treatment system according to claim 1, characterized in that, The slag material system further includes an auxiliary slag crushing device, which is disposed in the medium temperature zone and / or the low temperature zone, and the crushing teeth of the auxiliary slag crushing device are arranged facing the mold cavity of the casting mold.

5. The high-temperature slag treatment system according to claim 4, characterized in that, The auxiliary crushing device also includes a lifting device, and the crushing teeth are mounted on the lifting device and can reciprocate under the drive of the lifting device.

6. The high-temperature slag treatment system according to claim 2, characterized in that, The air inlet and outlet of the temperature range are located on the same side wall of the hot air hood, with the air inlet located below the mold within the temperature range and the air outlet located above the mold within the temperature range. A flow-blocking component is provided on the side where the air inlet and the air outlet are located to prevent circulating air from flowing directly to the air outlet. Correspondingly, the heat-insulating sealing cover has a flow passage between its other side wall away from the air inlet and the air outlet and the mold within the temperature range.

7. The high-temperature slag treatment system according to claim 6, characterized in that, The flow-blocking component is fixedly disposed on the side wall of the heat-insulating sealing cover between the air inlet and the air outlet, and extends to the side of the mold within the temperature range.

8. The high-temperature slag treatment system according to claim 1, characterized in that, The water cooling system also includes a deaerator, a low-pressure economizer, and a high-pressure economizer. The first inlet of the deaerator is connected to the demineralized water source. The first outlet of the deaerator is connected to the inlet of the low-pressure economizer. The outlet of the low-pressure economizer is connected to the second inlet of the deaerator. The second outlet of the deaerator is connected to the inlet of the high-pressure economizer. The outlet of the high-pressure economizer is connected to the second inlet of the steam drum.

9. The high-temperature slag treatment system according to claim 8, characterized in that, The steam outlet of the steam drum is also connected to the auxiliary steam inlet of the deaerator.

10. The high-temperature slag treatment system according to claim 8, characterized in that, The water cooling system also includes a demineralized water tank, which is a demineralized water source connected to the first inlet of the deaerator.

11. The high-temperature slag treatment system according to any one of claims 8 to 10, characterized in that, The return air duct is connected to the air inlet of the high-pressure economizer, the air outlet of the high-pressure economizer is connected to the air inlet of the low-pressure economizer, and the air outlet of the low-pressure economizer is connected to the air supply duct.

12. The high-temperature slag treatment system according to claim 11, characterized in that, The air-cooling system also includes a dust removal device and a fan, which are sequentially installed on the pipeline between the air outlet of the low-pressure economizer and the return air duct.

13. The high-temperature slag treatment system according to claim 12, characterized in that, An emergency air inlet is provided on the return air duct.

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