High-temperature steel slag full-process dry recycling and efficient heat energy recovery system

Abstract

The utility model discloses a high-temperature steel slag full-process dry-process recycling and efficient heat energy recovery system which is a novel system. The system comprises a crusher and a screw cone heat exchange cold material machine, the crusher crushes high-temperature steel slag and obtains the high-temperature steel slag with the granularity meeting the set requirement, and the high-temperature steel slag with the granularity meeting the requirement is continuously supplied to the screw cone heat exchange cold material machine; the spiral cone heat exchange material cooling machine comprises a rotating disc, a fixing cover and a rotating disc driving assembly, a spiral discharging channel is formed in the surface of the conical rotating disc, a heat exchange pipe is laid at the channel bottom or / and the side wall of the spiral discharging channel, high-temperature steel slag is cooled to the temperature not higher than 300 DEG C from the temperature higher than 1100 DEG C in the high-temperature area, and steam is obtained at the same time; and cooling the medium-high temperature steel slag from the high-temperature area to low-temperature steel slag with the temperature lower than 120 DEG C in the low-temperature area, and discharging the low-temperature steel slag to obtain hot water at the same time. The cooling of the high-temperature steel slag is realized, and the graded recovery of heat is also realized.

Description

Technical Field

[0001] This utility model relates to the field of cooling and heat recovery technology for high-temperature steel slag. Background Technology

[0002] Currently, steel slag pretreatment processes include hot quenching, hot pouring, roller crushing, and air quenching. According to current surveys, the vast majority of steel slag produced by steel mills nationwide is treated by cold quenching, and the sensible heat of the hot-melted steel slag is not recovered. Hot quenching is divided into two processes: pool-type hot quenching and pressurized hot quenching. However, pool-type hot quenching employs mechanized operations, using excavators to remove and crush the high-temperature steel slag poured into the quenching pool, requiring further improvements in equipment level and environmental emissions. Pressurized hot quenching, on the other hand, uses mechanized roller crushers to crush the high-temperature steel slag, offering advantages such as high equipment and automation, but with relatively high investment costs, poor sealing, and the water-cooling method used in the crushing process, making waste heat recovery impossible.

[0003] The slag temperature of freshly produced steel slag is as high as 1200~1300℃, containing a large amount of heat energy. The specific heat capacity of molten steel slag is about 1.2kJ / (kg·℃). If the temperature of the molten slag before and after heat recovery is 1100℃ and 500℃ respectively, then 1.2GJ of sensible heat can be recovered from each ton of steel slag, which is roughly equivalent to the heat generated by the complete combustion of 41kg of standard coal, and the heat energy is extremely high.

[0004] Various organizations have actively researched methods for effectively recovering the high thermal energy contained in high-temperature steel slag. For example, CN202211314933.9 discloses an efficient cooling and heat exchange method for high-temperature steel slag, which includes the following:

[0005] Step S1. The high-temperature steel slag is fed and spread out. It is transferred from the slag pot to a fixed grate cooling bed, where a flattening crushing roller is used to stir, crush, and flatten the slag, ensuring it is evenly distributed on the fixed grate cooling bed to a certain thickness. Step S2. The steel slag is cooled and crushed in multiple stages using both a fixed and a moving grate cooling bed. Step S3. The steel slag is cooled and unloaded. This method cools the high-temperature steel slag through air heat exchange, simultaneously obtaining high-temperature air at 300°C to 500°C. The heat from this high-temperature air is then reused, achieving the recovery and utilization of thermal energy from the high-temperature steel slag. A similar patent document, CN 118189649 A, discloses a high-efficiency cooling and waste heat recovery system for high-temperature solid materials, which also utilizes air to cool high-temperature materials.

[0006] The technical drawbacks of using air to cool high-temperature steel slag and recover heat energy are as follows:

[0007] 1. Since the specific heat capacity of water is 4.2 kJ / (kg*K) and the specific heat capacity of air is about 1.4 kJ / (kg*K), it means that at room temperature, water absorbs or releases about three times the heat of air for every degree increase or decrease. In other words, the heat exchange effect of water is significantly higher than that of air.

[0008] 2. The high-temperature air or flue gas generated after heat exchange is then used for heat exchange to obtain hot water. This heat exchange effect is relatively poor, that is, the thermal efficiency is relatively low, and it cannot produce supersaturated steam with a high-quality heat source.

[0009] 3. In the existing technology, air is used to directly cool the high-temperature steel slag. In the oxygen-rich environment, the iron element in the high-temperature steel slag will be partially oxidized, which will reduce the recovery rate of fine iron powder in the steel slag and affect the efficiency of the system. Utility Model Content

[0010] To address the shortcomings of existing technologies, this invention provides a dry-process resource recovery and high-efficiency heat energy recovery system and process for high-temperature steel slag. This technology utilizes pure water as a heat exchange medium to directly and efficiently cool high-temperature steel slag, while simultaneously obtaining high-quality steam and high-temperature hot water as byproducts. The steam can be used for industrial production, and the high-temperature hot water can be used for domestic water supply, thus solving the problem of dry-process cooling and heat energy recovery and reuse of high-temperature steel slag.

[0011] The technical solution adopted by this utility model to solve its technical problem is as follows:

[0012] A dry-process resource recovery and high-efficiency heat energy recovery system for high-temperature steel slag is disclosed. The system includes a crusher and a spiral heat exchanger. The crusher crushes the high-temperature steel slag to obtain high-temperature steel slag with a particle size meeting set requirements, continuously supplying the spiral heat exchanger with high-temperature steel slag of the required particle size. The spiral heat exchanger includes a turntable, a fixed cover, and a turntable drive assembly. A spiral discharge channel is provided on the conical surface of the turntable, with its high point and low point being the feed end and discharge end, respectively. Heat exchange tubes are laid at the bottom and / or sidewall of the spiral discharge channel, forming multiple independent spiral heat exchange units located near the feed end and in the high-temperature zone of the turntable. The spiral heat exchange unit is connected to the high-temperature slag-water cooling system, which cools the high-temperature steel slag from above 1100°C to no more than 300°C in the high-temperature zone, while the waste heat of the high-temperature slag-water cooling system is recovered to obtain steam. The spiral heat exchange unit near the discharge end and located in the low-temperature zone of the turntable is connected to the low-temperature slag-water cooling system, which cools the medium-high temperature steel slag from the high-temperature zone to low-temperature steel slag below 120°C in the low-temperature zone and discharges it, while the waste heat of the low-temperature slag-water cooling system is recovered to obtain hot water. The fixed cover is fixedly installed directly above the turntable, and a conical space for cooling and heat exchange of high-temperature steel slag is formed between the fixed cover and the turntable. The turntable drive assembly is connected to the turntable and drives the turntable to rotate. During the rotation, the high-temperature steel slag is pushed along the spiral discharge channel.

[0013] The spiral heat exchange unit is formed by multiple heat exchange tubes arranged side by side in the height direction and located on the wall panel of the spiral discharge channel. The back side of the wall panel is provided with fixing ribs to enhance the fixing strength with the turntable.

[0014] The spiral heat exchange unit is formed by laying multiple heat exchange tubes at the bottom of the spiral discharge channel.

[0015] The spiral discharge channel is provided with ribs on both sides, and the spiral heat exchange unit is formed by laying multiple heat exchange tubes at the bottom of the spiral discharge channel and / or on the side wall of the ribs.

[0016] The height of the wall panels on both sides of the spiral discharge channel gradually decreases from the feeding end to the discharge end.

[0017] Each spiral heat exchange unit is arranged in a 360-degree configuration, with no closed loops at either end, and a small radius at the starting end and a large radius at the ending end.

[0018] The discharge end of the spiral discharge channel is located on one side of the outer periphery of the turntable. A collection groove is arranged in a ring on the outer side of the turntable, and a discharge port is provided on the collection groove. Multiple scraper plates are fixed on the outer periphery of the turntable. The scraper plates are welded and fixed on the turntable. During the rotation of the turntable, the scraper plates are driven to slide along the collection groove. During the scraping process, the steel slag moves along the collection groove and is discharged from the discharge port of the collection groove when it reaches the discharge port.

[0019] The high-temperature slag water cooling system consists of a water supply tank, a flash tank, a circulating pump, pipes, valves, instruments, and a PLC intelligent control module. The water supply tank stores demineralized and softened water.

[0020] The low-temperature slag water circulation system consists of a tap water pipe, a booster pump, a plate heat exchanger, a cooling tower, pipelines, valves, instruments, and a PLC intelligent control module.

[0021] The turntable drive assembly is a chain drive assembly. The turntable body is a high-temperature resistant structure formed by a steel plate and refractory bricks laid on the surface of the steel plate. An I-beam steel frame is welded below the steel plate. A track and a metal chain are provided at the bottom of the I-beam steel frame, which are connected to the chain drive assembly and drive the turntable to rotate.

[0022] It also includes a steel slag buffer silo, which is located between the crusher and the screw cone heat exchanger. It is equipped with a blower system that supplies cold air into the steel slag buffer silo to temporarily store and buffer the high-temperature steel slag coming out of the crusher and to feed it in a quantitative manner.

[0023] The steel slag buffer silo is equipped with a high-temperature resistant spiral distribution disc with spiral ribs. The feeding speed of the steel slag buffer silo is driven by a drive motor through a bevel gear transmission below the spiral distribution disc.

[0024] The crusher includes a power grinding disc assembly, a power steel roller assembly, a steel slag collection assembly, and a crushing chamber assembly. The power grinding disc assembly includes a drive motor, a bevel gear reduction and transmission mechanism, a grinding disc, and scrapers. The scrapers are fixed at the edge of the grinding disc. The drive motor is horizontally positioned and connected to the transmission mechanism via the bevel gear reduction to drive the grinding disc to rotate horizontally. The power steel roller assembly, located directly above the grinding disc, includes a crushing roller, bearing assemblies, a hydraulic motor, and a water-medium rotary joint. The two ends of the crushing roller along its length are mounted on a slider via two sets of bearing assemblies. The slider is mounted on the equipment frame via a linear sliding fit. A linear hydraulic lifting cylinder is provided between the slider and the equipment frame. The crushing roller has a water-medium cooling channel inside and a water-medium rotary joint is installed at one end of the crushing roller. A hydraulic motor is installed at the other end of the crushing roller. The water-medium cooling channel is connected to an external water cooling system. The outer shell of the crushing chamber assembly covers the space above the grinding disc and the crushing roller, forming a crushing space. A steel slag feeding port and a hot air exhaust port are provided on the top of the outer shell.

[0025] The crushing roller is provided with roller teeth, which are made of high-temperature resistant alloy material.

[0026] The grinding disc is made of cast iron and has a water-cooling cavity inside, which is connected to an external water-cooling system.

[0027] The steel slag collection assembly includes a collection trough, a discharge plate, and a discharge port. The collection trough is arranged around the annular periphery of the grinding disc, and the cross-section of the collection trough is U-shaped. An air vent is provided on the side of the collection trough, and at least one discharge port is provided at the bottom of the collection trough. A discharge plate is provided directly below the discharge port. The scraper is inserted into the collection trough and scrapes off the crushed steel slag in the collection trough.

[0028] The turntable has an upward-protruding conical material distribution protrusion at its center, which has a spiral protrusion. An air distribution pipe is provided on the lower side of the conical material distribution protrusion, and an air distribution nozzle is provided on the conical material distribution protrusion. The air distribution pipe is connected to an external blower.

[0029] The beneficial effects of this utility model are:

[0030] 1. During the implementation of this system and process, high-temperature steel slag is indirectly cooled by soft water medium in a relatively closed space and a metal spiral tube. There is no need to blow a large amount of air into the cooling space, thus avoiding the presence of a large amount of fresh, oxygen-rich flowing air in the cooling space. This reduces the oxidation of iron in the steel slag during the cooling process, effectively improves the iron recovery rate in the subsequent steel slag micronization process, and is conducive to the formation of high-grade cooled steel slag.

[0031] 2. This system and its implementation process divide the cooling space into high-temperature and low-temperature zones based on temperature. The high-temperature zone, in conjunction with a flash tank, generates supersaturated steam, producing high-quality industrial steam. The low-temperature zone produces hot water, thus achieving both cooling of the high-temperature steel slag and staged heat recovery, while also yielding some high-quality supersaturated steam.

[0032] 3. In this system and its implementation process, the high-temperature steel slag and cooling water do not come into direct contact. It is a non-contact heat exchange technology. Therefore, there is no need to install a dust removal system or a small-volume dust removal system in this process. Moreover, by utilizing the hot air expansion effect of the high-temperature steel slag, the heat exchange space can always be kept under a slight negative pressure, which saves investment.

[0033] 5. Through the implementation of this process, taking general high-temperature steel slag as an example, when the temperature of 1 ton of steel slag is reduced from 1100 degrees to 300 degrees, theoretically 425 kg of steam can be generated. In practice, the amount of supersaturated steam generated per ton of steel slag is no less than 200 kg. This high-temperature supersaturated steam can be widely used in industrial production, such as steam power generation equipment and steam drying equipment. Attached Figure Description

[0034] Figure 1 This is a layout diagram of the high-efficiency heat recovery system according to Embodiment 1 of this utility model.

[0035] Figure 2 This is a layout diagram of the high-efficiency heat recovery system according to Embodiment 2 of this utility model.

[0036] Figure 3 This is a structural diagram of a spiral taper heat exchanger for cooling materials.

[0037] Figure 4 This is a structural diagram of a spiral taper heat exchanger for cooling materials.

[0038] Figure 5 This is a planar development diagram of a turntable with a spiral discharge channel.

[0039] Figure 6 This is a diagram of the high-temperature slag water cooling system in the high-temperature zone.

[0040] Figure 7 This is a diagram of the low-temperature slag water circulation system in the low-temperature zone.

[0041] Figure 8 This is a schematic diagram of the three-dimensional spatial structure of a spiral heat exchanger tube.

[0042] Figure 9 This is a partial cross-sectional view of the turntable corresponding to style one.

[0043] Figure 10 This is a partial cross-sectional view of the turntable corresponding to style two.

[0044] Figure 11This is a partial cross-sectional view of the turntable corresponding to style three.

[0045] Figure 12 This is a partial cross-sectional view of the turntable corresponding to style four.

[0046] Figure 13 This is a partial view of the turntable frame and the drive mechanism below it.

[0047] Figure 14 This is a structural diagram of a steel slag buffer silo.

[0048] Figure 15 This is a top view of a high-temperature resistant continuous roller crusher.

[0049] Figure 16 for Figure 15 Sectional view A-A.

[0050] Figure 17 for Figure 15 Plan view of B-B.

[0051] Figure 18 This is a side view of a high-temperature resistant continuous roller crusher.

[0052] Figure 19 This is a schematic diagram of a water-cooling system. Detailed Implementation

[0053] This embodiment introduces a dry-process resource utilization and high-efficiency heat energy recovery system and technology for high-temperature steel slag. The technical objectives of this system and technology are: First, to reduce the temperature of high-temperature steel slag (above 1000°C) to no higher than 150°C without direct spraying, keeping the slag dry throughout the cooling process, avoiding direct air convection, and ensuring the high-temperature steel slag is in a low-oxygen environment to prevent secondary oxidation of the pure iron components in the slag, thus laying the foundation for subsequent steel slag reuse. Second, to use water-cooled heat exchange during the heat exchange process to generate as much supersaturated steam as possible; the more supersaturated steam generated, the greater the value of heat energy recovery. Third, to implement the equipment in a three-dimensional manner, arranging it along the direction of gravity to reduce the footprint and equipment investment.

[0054] Example 1

[0055] The first technical approach of this system is based on the combined use of a steel slag leveling crusher, a steel slag buffer silo, and a spiral cone heat exchanger cooler, along with a high-temperature slag-water cooling system and a low-temperature slag-water cooling system to support heat recovery. The three pieces of equipment—the crusher, the steel slag buffer silo, and the spiral cone heat exchanger cooler—are rationally arranged in a three-dimensional spatial arrangement from top to bottom according to gravity, achieving basic uninterrupted production. (See the process diagram for reference.) Figure 1 The combination shown.

[0056] The crusher 200 in this embodiment can be supplied by a manufacturer with existing mature technology, such as a steel slag leveling crusher.

[0057] The steel slag buffer silo 300 below the crusher 200 has a high-temperature resistant spiral feeder 330 inside. The spiral feeder 330 has spiral ribs 331. The feeding speed of the steel slag buffer silo is controlled by the drive motor 350 through the bevel gear transmission 340 below the spiral feeder silo. It has both the function of temporary storage of steel slag and the function of quantitative feeding.

[0058] refer to Figure 15 In this embodiment, the steel slag buffer bin 300 is used for temporary storage and buffering of steel slag from the self-rolling crusher to the feed of the screw cone heat exchange cold material machine 400, and for quantitative feeding. The time is relatively short, generally not more than 30 minutes, and the inner and outer walls of the steel slag buffer bin are protected against high temperature.

[0059] Furthermore, an air supply duct 310 and a return air chamber 320 can be installed inside the steel slag buffer silo 300 to control the temperature accumulation of the accumulated steel slag by slowly blowing cold air into the buffer silo.

[0060] A discharge port is provided on the lower side of the steel slag buffer silo 300, and below the discharge port is the spiral taper heat exchange cold material machine 400.

[0061] The steel slag buffer silo 300 mentioned above can be selected according to the actual situation. When the steel slag buffer silo is not configured, the screw cone heat exchange cold material machine is directly installed below the crusher, as shown in Example 2.

[0062] The structure of the spiral taper heat exchanger cooler is described in reference to Embodiment 2, and will not be described separately in this embodiment.

[0063] Example 2

[0064] The second technical approach of this system is based on the combined use of a crusher and a spiral heat exchanger. This involves directly feeding the high-temperature steel slag produced after crushing into the spiral heat exchanger for heat exchange, eliminating the need for a steel slag buffer silo. In this case, a buffer space can be set at the feed inlet of the spiral heat exchanger to control the feeding of the steel slag material. This process is referenced... Figure 2 The combination shown requires a crusher capable of continuous, uninterrupted production, whereas a typical crusher produces material intermittently. Figures 15 to 19 An example of a dedicated crushing machine is provided.

[0065] Following the processing route as a guide, the following section provides a detailed introduction to the structure, function, and operation of each component device.

[0066] The steel slag from the steelmaking furnace is collected in a slag pot 100 with an effective volume of 11-13 m³. The high-temperature steel slag in the slag pot 100 is slowly poured into the crusher 200 through transportation and hoisting.

[0067] The high-temperature steel slag produced by the crusher 200 must have a particle size of less than 40 mm. Steel slag lumps larger than 40 mm are intercepted or processed separately to meet the requirements of the subsequent screw taper heat exchange cold feeder.

[0068] The particle size of the high-temperature steel slag produced by the crusher can be adjusted according to the actual situation. Theoretically, 100 mm is the maximum value, and it can be set to specifications such as 80 mm, 50 mm, and 30 mm. This is set by the manufacturer and depends on the parameter settings of the crusher. Regardless of the parameter settings, they are all within the protection scope of this utility model.

[0069] This crusher is a high-temperature resistant continuous crusher. The structural composition of this crusher 200 is as follows:

[0070] Following the functional division approach, the system includes an equipment frame 210, a powered grinding disc assembly 220, a powered steel roller assembly 230, a steel slag collection assembly 240, a crushing chamber assembly 250, a personnel platform 260, a blower system 270, and a water cooling system 280. This utility model does not impose excessive limitations on the style and outline of the equipment frame. The equipment frame 210 shown in the illustration is an example for the specific and visual representation of the equipment; modifications to various structures should be protected.

[0071] refer to Figure 15 In this embodiment, the equipment frame is generally cylindrical in shape and includes a personnel platform 260 for equipment inspection and maintenance. The bottom of the equipment frame 210 is fixed to a dedicated foundation using ground anchors 211 to ensure its stability and reliability.

[0072] The power grinding disc assembly 220 and the power steel roller assembly 230 are installed at the equipment frame 210. The power grinding disc assembly 220 is below and the power steel roller assembly is above. The combination of the two forms a crushing cavity and crushing path for high-temperature steel slag, and realizes continuous feeding and continuous discharge, so that production is uninterrupted. The core components are designed with cooling to meet the requirements of high-temperature operating environment.

[0073] Figure 16The power mill assembly 220 includes a drive motor 221, a coupling 222, a bevel gear reducer and transmission mechanism 223, a millstone 224, and a scraper 225. The drive motor 221 is horizontally positioned, and its power shaft is connected to the power shaft of the bevel gear reducer and transmission mechanism 223 via the coupling. The vertical output shaft of the bevel gear reducer and transmission mechanism 223 is mechanically connected and drives the millstone 224 to rotate horizontally. In other words, the millstone 224 is rotatably mounted directly above the bevel gear reducer and transmission mechanism, a rotatable, movable mounting. The drive motor drives the millstone to rotate dynamically.

[0074] Furthermore, the aforementioned millstone 224 is made of cast iron, particularly a high-temperature resistant alloy cast iron, to meet the physical properties required at high temperatures. In terms of spatial structure, the millstone 224 has a casting cavity 2241 in the center. The presence of this casting cavity allows the millstone to form a cast body with uniform wall thickness, and overheating is prevented by implementing different methods of water cooling and air cooling within the casting cavity for temperature control.

[0075] Air cooling method Figure 17 The casting cavity 2241 is equipped with an air-cooling pipe 2242, which is equipped with a jet nozzle. The inner wall of the casting cavity is cooled by jetting air. Since the grinding disc is a rotating component, an air passage is provided on the vertical output shaft of the bevel gear reduction and transmission mechanism. A pneumatic rotary joint is installed at the lower end of the air passage, and the upper end is connected to the air-cooling pipe. The pneumatic rotary joint 271 is connected to the blower system 270. That is, the blower system continuously cools and controls the grinding disc.

[0076] Water cooling method Figure 19 The grinding disc 224 features a water-cooling design within its internal cavity. Specifically, a water-cooling channel 282 is provided within the vertical main shaft of the bevel gear reduction and transmission mechanism. This channel includes an inlet water channel and a return water channel. A rotary joint 283 is located at the bottom of the vertical main shaft and connected to the water-cooling system 280 of the crushing roller. The grinding disc is cooled through water circulation. In this embodiment, the grinding disc omits the design of a high-temperature resistant material layer. Water cooling keeps the main body temperature of the grinding disc below 300 degrees Celsius, thus eliminating the need for a high-temperature resistant insulation layer.

[0077] refer to Figure 16 and Figure 17When a water-cooling system is not configured, the upper surface of the millstone 224 is a milling working surface composed of refractory material, and the sides of the millstone are scraper mounting surfaces. Specifically, it is covered with a refractory material layer 2243, which can be laid refractory bricks or refractory coatings, such as refractory high-alumina bricks. This refractory material layer covers the upper surface and annular sides of the millstone, forming a refractory coating on the cast iron millstone and preventing direct contact between the cast iron millstone and high-temperature steel slag.

[0078] Furthermore, an annular flange 2244 is provided at the edge of the rolling working surface, and a refractory baffle plate 2245 is fixed on the inner wall of the power steel roller assembly housing above the corresponding side of the flange. The baffle plate is also annular and is set with a uniform gap with the flange. The gap between the baffle plate and the flange determines the particle size of the crushed steel slag. Only steel slag that meets the particle size requirements can pass through the gap between the baffle plate and the flange and fall.

[0079] Furthermore, the aforementioned refractory material layer 2243 includes an annular refractory cover and a pressing ring, through which the pressing ring securely fixes the refractory cover to the millstone, as shown in the reference. Figure 17 .

[0080] Furthermore, a raised cone 2246 is provided at the center of the working surface of the grinding disc. The highest point of the cone 2246 is lower than the lowest point of the steel roller in the power steel roller assembly, thus representing the center position of the grinding disc. In other words, the central axis of the cone and the central axis of the grinding disc are collinear. This arrangement ensures that the steel slag material on both sides of the cone is isolated from each other during the rotation of the grinding disc 224, preventing the steel slag from converging towards the center. The cone 2246 is not a necessary configuration; both including and omitting the cone 2246 are within the protection scope of this utility model.

[0081] There are multiple scrapers 2245, which are evenly installed on the side of the grinding disc at the annular wing plate 2247 and are set vertically. These scrapers are used to discharge high-temperature steel slag in the collection trough.

[0082] The steel slag collection assembly 240 includes a collection trough 241, an air supply pipe 242, a discharge plate 243, and a discharge port 244. The collection trough and air supply pipe are annular structures, concentric with the aforementioned millstone. Specifically, the collection trough 241 is arranged around the annular periphery of the millstone, and its cross-section is U-shaped. At least one discharge port 244 is provided at the bottom of the collection trough 241 for discharging steel slag. A discharge plate 243 is located directly below the discharge port, and it is inclined for directional discharge. A scraper 2245 is inserted into the collection trough 241 to scrape away the crushed steel slag within.

[0083] Furthermore, when the bottom of the collection trough 241 is designed as an inclined surface, for example, with a slope of 20 degrees, the design of the scraper can be omitted, and this design should also fall within the protection scope of this utility model.

[0084] The aforementioned air supply pipe 242 is located on one side of the collection trough, for example, on the inner or outer side. In this embodiment, it is exemplary and located on the inner side. The air supply pipe 242 is fixedly connected to the collection trough, and an air inlet 245 is provided on the side of the corresponding collection trough 241. The air inlet is connected to the air supply port on the air supply pipe, and the air supply pipe 242 is connected to the blower system 270. That is, cold air is blown into the collection trough by the blower. The blown cold air flows upward in the opposite direction to cool the falling high-temperature steel slag and prevent the high-temperature steel slag from sticking together in the collection trough.

[0085] In this embodiment, the material collection trough 241 is a composite structure composed of a refractory metal shell and a high-temperature resistant material layer. The material collection trough is fixed to the equipment frame 210 by welding steel sections. The upper part of the material collection trough 241 is the shell of the crushing chamber assembly. The two are connected in a sealed manner, which can be a flexible connection or a rigid connection.

[0086] The power steel roller assembly 230 includes a crushing roller 231, a bearing assembly 232, a hydraulic motor 233, and a water-medium rotary joint 234. The necks at both ends of the crushing roller 231 along its length are mounted on sliders 212 of the equipment frame 210 via two sets of bearing assemblies 232. The sliders 212 are part of the slider assembly. The slider assembly refers to a vertically arranged linear slide rail 213 on the equipment frame, and a groove on the linear slide rail. The slider is mounted on the equipment frame 210 through the linear sliding fit. A linear hydraulic lifting cylinder 214 is arranged between the slider and the equipment frame. The linear hydraulic lifting cylinder 214 is vertically arranged and lifts the height of the slider. That is, the height of the crushing roller can be adjusted by the linear hydraulic lifting cylinder.

[0087] The crushing roller 231 has a water medium cooling channel 2311 inside, and a water medium rotary joint 234 is installed at one end of the crushing roller. The flow direction of the liquid cooling medium is referenced. Figure 19 The temperature of the crushing roller is controlled by water cooling, primarily for cooling purposes. A hydraulic motor 233 is installed at the other end of the crushing roller. This hydraulic motor is located between the end of the crushing roller and the steel frame of the equipment, driving the crushing roller to rotate mechanically. In other words, the hydraulic motor is the power component of the crushing roller.

[0088] Roller teeth 2312 are provided on the crushing roller 231. These roller teeth are made of high-temperature resistant alloy material and are fixed on the crushing roller. This design allows the roller teeth to be replaced after they wear out, thereby reducing the cost of use and maintenance.

[0089] Furthermore, the aforementioned water-medium cooling channel refers to a channel where the inlet water channel is located at the center of the crushing roller, and the return water channel is located in the annular space inside the crushing roller. A water-medium rotary joint with inlet and outlet water channels is used to achieve water circulation. During this process, room temperature water enters the water-cooling system 280 through this water-medium cooling channel. (Refer to...) Figure 19 The water cooling system 280 preferentially uses plate heat exchanger 281 or cooling tower 2811 for cooling.

[0090] The crushing chamber assembly 250 surrounds the working section of the crushing roller. The entire crushing chamber assembly 250 is a high-temperature resistant outer shell component. This shell is a composite structure composed of a metal plate and a refractory lining, meeting both installation and fire resistance requirements. The outer shell of the crushing chamber assembly 250 covers the space above the grinding disc, and the interface between the outer shell and the crushing roller is a flexible connection. A flexible connection means that a flexible refractory material is used at the interface between the outer shell and the crushing roller. (Refer to...) Figure 16 This setup meets the stroke requirements for the crushing roller lifting process and ensures a good seal during the lifting process.

[0091] The aforementioned outer shell is a dome-shaped structure consisting of a top and sides, with a steel slag feeding port 251 and a hot air exhaust port 252 provided on the top of the outer shell. The number of steel slag feeding ports 251 can be one or more. The number of hot air exhaust ports 252 can be one or more, used for exhausting hot air from the aforementioned crushing chamber to form an air-cooling system.

[0092] The cooling air in the aforementioned crushing chamber can be generated by blowing air, i.e., active air supply, for example... Figure 18 The structure shown can also be formed by ventilation, for example, by installing an exhaust fan (not shown in the illustration) at the hot air exhaust port, which can also form air circulation. When the exhaust fan is working, the air supply pipe on one side of the collection trough can be omitted, that is, only air inlet micro-holes need to be set on the collection trough. The hot air temperature obtained by the above-mentioned air cooling is usually higher than 200 degrees Celsius. Furthermore, the heat energy contained therein can be recovered and reused through an air-to-air heat exchanger.

[0093] The core mechanism of the spiral heat exchange cold feeder in this embodiment is a turntable 410 with a spiral discharge channel 420. The spiral discharge channel 420 is formed in the following way: the turntable 410 is a conical profile component, and the high point at the center of the turntable is the feed end 411, and the low point at the outer circumference of the turntable is the discharge end 412. A spiral discharge channel 420 is formed between the feed end and the discharge end through a heat exchange wall 430, which is arranged from top to bottom. The spiral discharge channel 420 spirals down from the upper side of the turntable until it reaches the edge of the turntable 410.

[0094] In this embodiment, the heat exchange wall 430 is formed by splicing together multiple independent spiral heat exchange units 431. The splicing seam 4311 between two spiral heat exchange units 431 is as small as possible, or the splicing seam is filled, for example, by using mud seal. When the splicing seam is small enough, mud seal is not required.

[0095] Furthermore, the height of the heat exchange walls on both sides of the aforementioned spiral discharge channel gradually decreases from the feed end to the discharge end 412, as shown in the reference. Figure 3 As shown, the height of the spiral heat exchange unit 431 located in the high-temperature zone is significantly greater than that of the spiral heat exchange unit 431 located in the low-temperature zone. This design is beneficial for forming sufficient heat exchange paths and obtaining a sufficient amount of supersaturated high-temperature water.

[0096] As described above, the heat exchange wall 430 is formed by splicing together multiple independent spiral heat exchange units 431, as shown in the reference. Figure 8 Each spiral heat exchange unit 431 is composed of heat exchange tubes 432 arranged side by side in the height direction. For example, multiple heat exchange tubes are welded together to form a wall-like spiral heat exchange unit 431 with thickness. Each spiral heat exchange unit is arranged in 360 degrees and is not closed at the beginning and end. The starting end has a small radius and the ending end has a large radius, forming a pitch of the heat exchange wall.

[0097] By introducing desalinated and softened water medium into the heat exchange tubes 432 of the spiral heat exchange unit, and ensuring that the desalinated and softened water medium is in a moderately flowing state under the action of a booster pump, heat exchange occurs. The desalinated and softened water medium within the multiple heat exchange tubes 432 of each spiral heat exchange unit is essentially in an isothermal state. This achieves heat exchange between the high-temperature steel slag and the desalinated and softened water medium. This heat exchange process lowers the temperature of the high-temperature steel slag and raises the temperature of the desalinated and softened water medium, thus converting the sensible heat of the high-temperature steel slag into high-temperature water (desalinated and softened water medium) at a certain pressure and temperature. Finally, a high-temperature slag-water cooling system is used to flash-evaporate the high-temperature, high-pressure hot water to produce saturated steam of a certain quality, obtaining high-quality saturated steam for industrial production. Alternatively, a low-temperature slag-water circulation system can be used to produce low-quality hot water for domestic or industrial use.

[0098] refer to Figure 3 / 4 and Figure 7 / 8 The above-mentioned spiral heat exchange units are multiple and are connected end to end to form an approximately continuous spiral discharge channel 420. This spiral discharge channel 420 is the propulsion path of high-temperature steel slag. That is, the high-temperature steel slag is propelled in this spiral discharge channel 420. Through the design of this spiral structure, the high-temperature steel slag has a sufficiently long heat exchange path, which is of positive significance for ensuring the heat exchange effect and can realize the miniaturization of the equipment.

[0099] To elaborate further, the heat exchange zone within this spiral taper heat exchanger is divided into a high-temperature zone and a low-temperature zone. For ease of distinction and illustration, in Figure 5The diagram shows a virtual dividing line L; this dividing line does not exist in actual space and is only shown for ease of understanding of the technology. The high-temperature zone is a ring-shaped area near the feed end 411, and the low-temperature zone is a ring-shaped area near the discharge end 412. The spiral heat exchange pipes in each zone form independent cooling pipe systems, i.e., they form independent closed loops through different booster pumps and pipes. The water circulation pipes in the high-temperature zone are connected to the high-temperature slag-water cooling system, and the water circulation pipes in the low-temperature zone are connected to the low-temperature slag-water cooling system. Cooling is achieved through a staged process to obtain different amounts of supersaturated high-temperature hot water and ordinary hot water. The objective of high-temperature zone A is to cool high-temperature steel slag from above 1000℃ to approximately 300℃, while simultaneously obtaining high-pressure, high-temperature supersaturated hot water at a pressure of 2.0MPa and a temperature of 200℃. This objective is achieved through heat exchange via heat exchange tubes 432 in this high-temperature zone. Furthermore, the demineralized softened water medium within the spiral heat exchange pipes in this zone flows in a counter-current direction. Counter-current flow means that the flow direction of the demineralized softened water medium is opposite to the flow direction of the high-temperature steel slag within the spiral discharge channel 420, thereby achieving optimal heat exchange performance. This improved heat exchange performance is not only reflected in higher heat exchange efficiency but also in a higher outlet temperature of the high-temperature, high-pressure supersaturated hot water. (Reference) Figure 6 The high-temperature supersaturated hot water generated from heat exchange enters the steam generator at 500°C, where it undergoes pressure reduction and flash evaporation to produce steam. The steam generator operates at 0.8 MPa, producing saturated steam and saturated condensate at 175.4°C. The saturated steam is channeled into the steam network via a branch line for utilization. The saturated condensate (demineralized softened water) is returned to the screw-type heat exchanger cold feeder via a booster pump for further heat exchange with the steel slag. After the temperature rises again to 200°C, it re-enters the steam generator for flash evaporation to produce steam. This cycle continues, producing stable saturated steam. Simultaneously, the water volume reduced after flash evaporation needs continuous replenishment to maintain overall thermal and material balance. The saturated steam produced in this high-temperature zone is high-quality steam.

[0100] The low-temperature zone B of the spiral hot-exchange cold packer, refer to... Figure 7 Within the zone, medium-high temperature steel slag at around 300℃ is further cooled to low temperature steel slag below 120℃, while simultaneously generating hot water. The temperature of the hot water obtained through heat exchange in this low-temperature zone B is theoretically higher than 60℃. This hot water can be used to raise the temperature of domestic or industrial water through heat exchange via plate heat exchanger 600, such as warm water for domestic and industrial use in the factory area, meeting the requirements for subsequent transportation and storage. If hot water storage is not required, the generated hot water can also be cooled to below 45℃ by cooling tower 610, and then pumped back to the low-temperature zone for circulation heat exchange, forming an independent system. The water system uses a cooling tower for closed-loop circulation.

[0101] refer to Figure 5The discharge end 412 of the aforementioned spiral discharge channel 420 is located on one side of the outer periphery of the turntable. A collection groove 440 is arranged in a ring on the outer side of the turntable to collect the steel slag material discharged from the outer periphery of the turntable. A discharge port 441 is opened at a certain point in the collection groove 440. At the same time, multiple scraper plates 450 are fixed on the outer periphery of the edge of the turntable 400. The scraper plates are welded and fixed to the turntable 400, and the scraper plates are located in the collection groove and scrape the steel slag material in the collection groove. Specifically, when the turntable rotates, it drives the scraper plates 450 to slide along the collection groove and scrape the steel slag in the collection groove. During the scraping process, the steel slag moves along the collection groove and is discharged from the discharge port 441 when it reaches the discharge port.

[0102] The aforementioned high-temperature slag water cooling system consists of a water supply tank, a flash tank, a circulating pump, pipes, valves, instruments, and a PLC intelligent control module. The water supply tank stores demineralized and softened water medium, as shown in Figure 6.

[0103] The aforementioned low-temperature slag water circulation system consists of a water supply pipe, a booster pump, a plate heat exchanger, a cooling tower, piping, valves, instruments, and a PLC intelligent control module. (Refer to...) Figure 7 .

[0104] This spiral heat exchanger cooler achieves heat transfer between the water medium inside the spiral heat exchange pipe and the high-temperature steel slag outside the pipe, thus cooling the high-temperature steel slag and heating the water medium.

[0105] The heat exchange space of this spiral heat exchanger cold packer utilizes segmented heat exchange, with each circumference serving as a heat exchange unit. This allows for the generation of high-quality supersaturated hot water and supersaturated steam, directly providing a high-quality steam heat source that can be directly used in production. Simultaneously, low-quality hot water is obtained in the low-temperature zone.

[0106] The turntable 400 body is a high-temperature resistant structure formed by a steel plate 401 and refractory bricks 402 laid on the surface of the steel plate. An I-beam frame 403 is welded below the steel plate 401 to form a support structure. A track 404 and a metal chain 405 are provided at the bottom of the I-beam frame, with four sets of tracks arranged in a circular pattern. The metal chain is installed on the side of the bottom of the I-beam frame, surrounding its sides. Ground wheel assemblies 406 are installed on the foundation below the tracks to support the I-beam frame, with at least one set of ground wheel assemblies having a restraining function, allowing the I-beam frame to rotate circularly along the tracks and ground wheels. At least one chain drive assembly 407 is installed on the foundation. Specifically, the chain drive assembly includes a drive motor, a reducer, and a metal sprocket. In this embodiment, the drive motor and reducer are installed vertically, and the metal sprocket is installed horizontally on the power output shaft of the aforementioned accelerator. The metal sprocket meshes with the aforementioned metal chain and drives the aforementioned I-beam steel frame to rotate. During the rotation of the I-beam steel frame, the aforementioned turntable is also rotated. Therefore, the chain drive assembly 407 is a rotational power drive module. A side stop limiting assembly 408 is provided at the inner annular edge of the steel frame for horizontal limiting.

[0107] This power drive module may also have other forms, such as those driven by gear and ring gear transmission, which will not be described in detail here, and are all within the scope of this utility model.

[0108] It also includes a fixed cover 700, which is fixedly installed above the turntable by a steel structure 710. The fixed cover also has a conical profile. The fixed cover and the turntable form an equally spaced conical space 720, which is also a high temperature and high heat space. Based on the principle of facilitating maintenance, the heat exchange space should have sufficient space.

[0109] Furthermore, the fixing cover 700 is a composite structure consisting of a metal outer shell and an inner refractory brick layer. The metal outer shell has the advantage of easy molding, while the refractory brick layer has the advantage of high temperature resistance. Whether to install an insulation layer, such as insulating rock wool, on the outside of the fixing cover can be determined as needed. Alternatively, whether to lay metal pipes on the inner surface of the fixing cover 400 and add corresponding independent water circulation facilities can be determined as needed.

[0110] The physical center of the aforementioned fixed cover 700 is the feed inlet 730, which is the feed inlet for the high-temperature steel slag. Below this feed inlet is the physical center of the turntable 400. To facilitate the deceleration of the steel slag and reduce its vertical impact on the turntable, an upward-protruding conical distribution protrusion 740 is set at the center of the turntable corresponding to this feed inlet. This conical distribution protrusion faces the feed inlet of the fixed cover. When the high-temperature steel slag falls downwards under gravity, the high-speed falling slag collides with the conical distribution protrusion, causing it to bounce laterally and finally fall into the turntable. (Refer to...) Figure 3 Furthermore, a spiral protrusion 741 is provided in the aforementioned conical material distribution protrusion 740 to control the material distribution speed, as shown in the reference. Figure 4 The surface of the aforementioned conical material distribution protrusion 740 is a refractory material layer. An air distribution duct is installed on the lower side of the conical material distribution protrusion, and air distribution nozzles are installed on the protrusion. The air distribution duct is connected to a blower via a rotary joint, and blows cold air towards the upper feed inlet of the conical material distribution protrusion. This process only cools the surface of the high-temperature steel slag at the moment of material falling, thus solving the problem of steel slag adhesion during the falling process and ensuring uniform and effective steel slag distribution.

[0111] Furthermore, the lower edge of the aforementioned fixed cover fits snugly against the outer edge of the material collection groove of the aforementioned turntable, and a refractory material, such as insulating rock wool, is placed between them to form a seal. This structure allows for a detachable, assembled connection between the fixed cover and the material collection groove, meeting maintenance needs. Alternatively, an inspection door can be provided at some point on the fixed cover, allowing for quick opening and maintenance, facilitating rapid equipment maintenance.

[0112] Innovations in the spiral heat exchange pipes of this spiral heat exchanger chiller:

[0113] In style one, a spiral layout is performed on the conical surface of the aforementioned turntable, starting from the feed end and moving towards the discharge end. This layout refers to drawing on the conical surface to create fixed points for the spiral heat exchange pipe. The spiral layout in this style is a single spiral. After the layout is completed, a spiral heat exchange unit is fabricated using wear-resistant metal tubing. This spiral heat exchange unit is designed for 360 degrees. Figure 8 and Figure 9 Multiple spiral heat exchange units 431 are formed by welding multiple heat exchange tubes 432 side by side in the height direction, forming a three-dimensional rib shape. In order to enhance the fixing strength between the spiral heat exchange unit and the diameter of the turntable, a fixing rib is provided on the back side between the turntable and the reinforced spiral heat exchange unit. The fixing rib supports the reinforced spiral heat exchange unit in the lower position in the direction of gravity. This support can effectively improve the support for the steel slag particles and prevent the reinforced spiral heat exchange unit from deforming.

[0114] The high point of each enhanced spiral heat exchange unit is connected to 4211 through a vertical first water supply branch pipe. The first water supply branch pipes of multiple enhanced spiral heat exchange units are connected in a secondary manner and converge to the second water supply branch pipe 4212. The second sequential branch pipe is preferably set horizontally. The horizontally set second water supply branch pipe is connected to the third water supply branch pipe 4213 through a tee. The outer side of the third water supply branch pipe is connected to a rotary joint.

[0115] Similarly, the lowest point of each enhanced spiral heat exchange unit is connected to 4411 via a vertical first return water branch pipe. The first return water branch pipes of multiple enhanced spiral heat exchange units are connected in a secondary manner and converge to the second return water branch pipe 4412. The second return water branch pipe is preferably set horizontally. The horizontally set second return water branch pipe is connected to the third return water branch pipe 4413 via a tee. The outer side of the third return water branch pipe is connected to a rotary joint.

[0116] The branch pipes mentioned above are named according to the direction of water flow. Under working conditions, the temperature of the supply water is significantly lower than that of the return water.

[0117] The surface of the turntable is covered with refractory bricks 402, forming a channel for the steel slag material to be pushed between the turntable and the spiral tubes on both sides. When the turntable rotates clockwise, the steel slag material inside slides downward under the driving force of the turntable's own weight.

[0118] Style 2, based on Style 1, includes the following additions for reference. Figure 10 Simultaneously, a spiral auxiliary heat exchange tube 4321 is arranged inside the turntable. This auxiliary heat exchange tube 4321 is also a 360-degree spiral, and it is arranged on the upper surface of the turntable. Specifically, it is fixedly installed on the bottom plate of the spiral steel slag propulsion channel. To distinguish it from the spiral heat exchange unit, it is called the spiral heat exchange bottom. Multiple auxiliary heat exchange tubes are arranged in parallel, and the inlet and outlet ends of the auxiliary heat exchange tubes are connected to the first inlet branch pipe 4212 and the first return branch pipe 4412. In this way, the steel slag directly contacts the bottom and sides of the spiral conveying channel, and heat is exchanged with the soft water medium inside the heat exchange tube.

[0119] Style 3, the structure of this style is as follows: (Reference) Figure 11In this embodiment, heat exchange tubes are no longer installed inside the heat exchange walls on both sides of the spiral discharge channel 420. Instead, traditional high-temperature resistant solid alloy ribs 415 are used. That is to say, unlike the second embodiment, the spiral discharge channel 420 is formed by alloy ribs 415 on both sides. The spiral discharge channel 420 is formed by spiral ribs, for example, welded to the ramp of the turntable 400. This channel is also the discharge channel for high-temperature steel slag. Spiral heat exchange tubes 432 are arranged inside the spiral discharge channel 420 of the turntable. These heat exchange tubes are also 360-degree spirals and are arranged on the upper surface of the turntable. Specifically, they are fixedly installed on the bottom plate of the spiral discharge channel, which is called the spiral heat exchange bottom. The inlet and outlet ends of the heat exchange tubes 432 are also connected to the first inlet branch pipe 4212 and the first return branch pipe 4412. In this way, the steel slag directly contacts the bottom and sides of the spiral conveyor channel, and heat is exchanged with the soft water medium inside the heat exchange tubes. This method only requires heat exchange tubes to be installed on the sloping bottom plate of the turntable, and even a dense arrangement of these tubes can achieve the purpose of heat exchange.

[0120] Style 4, based on Style 3, with reference to Figure 12 By covering the sides and bottom of the spiral discharge channel with heat exchange tube 432, the heat exchange area is increased. In this way, the heat exchange area in wall style three is larger and the heat exchange effect is better.

[0121] The above four styles systematically reveal the combination styles of heat exchange tubes and rotating discs, especially the four typical situations in which heat exchange tubes are used as heat exchange walls and heat exchange bottoms. All four situations are within the protection scope of this utility model.

[0122] Of course, the heat exchange wall and ribs mentioned above are arranged in a single spiral structure. Double spiral or even triple spiral arrangements can also be used. Compared with the single spiral structure, this will only increase the implementation cost, which is within the protection scope of this utility model.

[0123] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Without departing from the spirit of the present utility model, all modifications and improvements to the present utility model by those skilled in the art should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A dry-process resource utilization and high-efficiency heat recovery system for high-temperature steel slag, comprising a crusher and a screw cone heat exchanger cooler, characterized in that: The crusher crushes high-temperature steel slag, providing a continuous supply of high-temperature steel slag with the required particle size to the screw-cone heat exchange cold feeder; The spiral cone heat exchange cooling machine includes a turntable, a fixed cover, and a turntable drive assembly. The conical turntable (410) has a spiral discharge channel (420) on its surface. The high point and low point of the spiral discharge channel are the feed end (411) and the discharge end (412), respectively. Heat exchange tubes are laid at the bottom and / or sidewall of the spiral discharge channel (420). The heat exchange tubes are segmented to form multiple independent spiral heat exchange units (431). The spiral heat exchange unit (431) near the feed end and located in the high temperature zone of the turntable is connected to the high temperature slag water cooling system. The spiral heat exchange unit (431) near the discharge end (412) and located in the low temperature zone of the turntable is connected to the low temperature slag water cooling system. The fixed cover is fixedly installed directly above the turntable, and a conical space (720) for cooling and heat exchange of high-temperature steel slag is formed between the fixed cover and the turntable. The turntable drive assembly is connected to the turntable and drives the turntable to rotate. During the rotation, the high-temperature steel slag is pushed along the spiral discharge channel (420).

2. The high-temperature steel slag whole-process dry resource utilization and high-efficiency heat energy recovery system according to claim 1, characterized in that, The spiral heat exchange unit is composed of multiple heat exchange tubes (432) arranged in parallel in the height direction and located on the wall plate of the spiral discharge channel (420) forming the channel. The back side of the wall plate is provided with a fixing rib to enhance the fixing strength with the turntable.

3. A high-temperature steel slag whole-process dry resource utilization and high-efficiency heat energy recovery system according to claim 1 or 2, characterized in that, The spiral heat exchange unit is composed of multiple heat exchange tubes (432) laid at the bottom of the spiral discharge channel.

4. The high-temperature steel slag whole-process dry resource utilization and high-efficiency heat energy recovery system according to claim 1, characterized in that, The spiral discharge channel is provided with ribs on both sides, and the spiral heat exchange unit is composed of multiple heat exchange tubes (432) laid at the bottom of the spiral discharge channel and / or on the side wall of the ribs.

5. The high-temperature steel slag whole-process dry resource utilization and high-efficiency heat energy recovery system according to claim 1, characterized in that, The turntable has a circular material collection groove on its outer side, and a discharge port (441) is provided on the material collection groove (440). A scraper (450) is fixed on the outer edge of the turntable (410). During the rotation of the turntable, the scraper (450) is driven to slide along the material collection groove. During the scraping process, the steel slag moves along the material collection groove and is discharged from the discharge port (441) of the material collection groove when it reaches the discharge port.

6. The high-temperature steel slag whole-process dry resource utilization and high-efficiency heat energy recovery system according to claim 1, characterized in that, It also includes a steel slag buffer silo (300), which is located between the crusher and the screw cone heat exchanger and is equipped with a blower system that supplies cold air into the steel slag buffer silo.

7. The high-temperature steel slag whole-process dry resource utilization and high-efficiency heat energy recovery system according to claim 6, characterized in that, The steel slag buffer silo (300) is equipped with a high-temperature resistant spiral distribution plate (330), which has spiral ribs (331). The feeding speed of the steel slag buffer silo is driven and controlled by a drive motor (350) through a bevel gear transmission (340) below the spiral distribution plate (330).

8. The high-temperature steel slag whole-process dry resource utilization and high-efficiency heat energy recovery system according to claim 1, characterized in that, The steel slag collection assembly (240) includes a collection trough (241), a discharge plate (243), and a discharge port (244). The collection trough (241) is arranged around the annular periphery of the grinding disc, and the cross-section of the collection trough is U-shaped. An air vent (245) is provided on the side of the collection trough (241). At least one discharge port (244) is provided at the bottom of the collection trough (241), and a discharge plate (243) is provided directly below the discharge port. A baffle plate (2245) is inserted into the collection trough (241).

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