A method and device for recovering and utilizing the residual heat of steel slag

Abstract

The application discloses a steel slag waste heat recycling method and device, and belongs to the technical field of steel slag heat energy recycling, which comprises a motor and a circulating water tank, a crushing column is fixedly connected to the motor, a power transmission assembly is rotatably connected to the motor, a crushing and heating assembly is rotatably connected to the power transmission assembly, a conveying assembly is rotatably connected to the other end of the power transmission assembly, a collecting assembly is fixedly connected to the conveying assembly, a water storage and filtering assembly is rotatably connected to the conveying assembly, a water spraying and heat absorbing assembly is fixedly connected to the conveying assembly, the crushing and heating assembly is used for crushing steel slag and absorbing heat, the power transmission assembly is used for driving the device, the water spraying and heat absorbing assembly is used for spraying water and absorbing steam, the conveying assembly is used for driving steel slag, the collecting assembly is used for classifying and collecting steel slag, and the water storage and filtering assembly is used for pumping and collecting water.

Description

Technical Field

[0001] This invention relates to the field of steel slag heat energy recovery technology, and in particular to a method and apparatus for recovering and utilizing waste heat from steel slag. Background Technology

[0002] Currently, steel production consumes a large amount of energy, and steel production also produces some steel slag. Most of this slag is simply cooled and then sold directly, resulting in a waste of heat. Now that heat recovery technology is mature, this heat can be fully utilized, reducing production costs, minimizing environmental pollution, and achieving efficient energy use.

[0003] The prior art, Chinese utility model patent with publication number CN108559812B, provides a steel slag waste heat recovery and utilization device. The advantages of this device are: it realizes the waste heat recovery of steel slag by the drum and the unidirectional flow channel control avoids heat loss. The disadvantages of this device are: the steel slag needs to be crushed before entering the device and the heat recovery speed of the steel slag is slow. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a device for crushing steel slag, making full use of the heat of steel slag, and classifying steel slag.

[0005] To address the above technical problems, the present invention adopts the following technical solution: a method and apparatus for recovering and utilizing waste heat from steel slag, comprising a motor and a circulating water tank. A crushing column and an outlet plate are fixedly connected to the motor, and a steam tank and a magnetic support are fixedly connected to the circulating water tank. The invention is characterized in that: a power transmission assembly is rotatably connected to the motor; a crushing and heating assembly is rotatably connected to the power transmission assembly; a transport assembly is rotatably connected to the other end of the power transmission assembly; a collection assembly is fixedly connected to the transport assembly; a water storage and filtration assembly is rotatably connected to the transport assembly; and a water spraying and heat absorption assembly is fixedly connected to the transport assembly. The crushing and heating assembly is used to crush the steel slag and absorb heat; the power transmission assembly is used for the transmission of the apparatus; the water spraying and heat absorption assembly is used for spraying water and absorbing steam; the transport assembly is used for the transmission of the steel slag; the collection assembly is used for classifying and collecting welding slag; and the water storage and filtration assembly is used for pumping and collecting water.

[0006] The crushing and heating assembly includes a rotating heating coil, which is rotatably connected to an outlet plate and an inlet plate. A solid filter ring is fixedly connected to the inlet plate, and a crushing column is rotatably connected to the solid filter ring. The crushing column is fixedly connected to a motor. An inlet baffle is rotatably connected to the inlet plate, and an inclined box is fixedly connected to the outlet plate. A water tank support is fixedly connected to the inclined box, and a heating water tank is fixedly connected to the water tank support. A steam delivery pipe, a water inlet, and a water outlet are fixedly connected to the heating water tank.

[0007] Furthermore, the power transmission assembly includes a belt I, which is rotatably connected to a motor and a transmission gear. The transmission gear is rotatably connected to a gear support. The transmission gear meshes with a compound gear. A long rod is fixedly connected to the compound gear. Two drive gears are fixedly connected to the long rod, which is rotatably connected to a rod support. The compound gear meshes with a bevel gear power transmission assembly 9. An L-shaped support and a bevel gear support are rotatably connected to the bevel gear.

[0008] Furthermore, the water spraying heat absorption component includes a steam box, on which a steam pipe and a water spraying pipe are fixedly connected. Two pressurization pipes are threadedly connected to the water spraying pipes, and a water pump is connected to the pressurization pipes.

[0009] Furthermore, the transport component includes a drive wheel, which is rotatably connected to a conveyor belt. The conveyor belt is rotatably connected to a driven wheel. An inclined box is fixedly connected to the outlet plate, and a shaking plate and an irregular cylinder are rotatably connected to the inclined box.

[0010] Furthermore, the collection assembly includes a magnetic cylinder rotatably connected to a magnetic support, which is fixedly connected to a circulating water tank. The collection assembly also includes a waste steel slag scraper, a waste collection box slidably connected to the waste steel slag scraper, an iron steel slag scraper fixedly connected to the waste steel slag scraper, and an iron steel slag collection box slidably connected to the iron steel slag scraper.

[0011] Furthermore, the water storage and filtration assembly includes a circulating water tank, on which a water filter plate and a water supply L-pipe are fixedly connected, and on which a water pump is fixedly connected.

[0012] Furthermore, the drive gear meshes with the rotating heating ring gear, a belt II is rotatably connected to the bevel gear, the other side of the belt II is rotatably connected to the drive wheel, and a belt IV is rotatably connected to the bevel gear, the other side of the belt IV is rotatably connected to the magnetic cylinder.

[0013] Furthermore, a heat exchanger I is fixedly connected to the steam conveying pipe, and a heat exchanger II is fixedly connected to the steam pipeline.

[0014] A method for recovering and utilizing waste heat from steel slag includes the following steps:

[0015] S1. Steel slag is loaded into a solid filter screen. After the crushing column crushes the steel slag, the heat of the steel slag is transferred to the heating water tank, and the heating water tank transfers the steam to the heat exchanger I.

[0016] S2. The steel slag is transported to the water spraying heat absorption component by the conveyor belt, and water is sprayed by the water spraying pipe. The large amount of steam generated by the steel slag when it comes into contact with water is transported to the heat exchanger II through the steam pipe.

[0017] S3. The steel slag is carried to the magnetic cylinder by the conveyor belt. The magnetic cylinder adsorbs the steel slag containing iron and then puts it into the iron and steel slag collection box for classified storage.

[0018] The advantages of this invention compared to the prior art are:

[0019] (1) The crushing and heating assembly described in this invention uses a motor to drive the crushing column to crush the steel slag. The heat from the crushed steel slag is transferred to the rotating heating ring, which is driven to rotate by a drive gear. The rotation of the rotating heating ring carries the crushed steel slag onto the shaking plate, so that the rotating heating ring can evenly transfer heat to the heating water tank, boil the water and evaporate it, and cause the steel slag to fall onto the shaking plate.

[0020] (2) The water spraying heat absorption and water storage filtration assembly of the present invention uses a water spraying pipe installed on a narrow groove on a steam box and a steam pipe installed on a wide groove. The water pump pumps the water in the circulating water tank to the pressurization pipe through the water delivery L pipe. The water that is not safely evaporated falls from the conveyor belt onto the water filter plate and then flows back from the water filter plate to the circulating water tank, thereby cooling the steel slag and recovering the generated steam and recycling the water.

[0021] (3) The transportation and collection components described in this invention use an active wheel to drive the conveyor belt to rotate, a transmission belt to drive the driven wheel, belt III to drive the irregular cylinder to rotate, a magnetic cylinder is installed on the magnetic support, a scrap steel scraper collects the scrap steel on the conveyor belt, and an iron steel slag scraper collects the iron steel slag on the magnetic cylinder, thereby realizing the transportation and classified storage of steel slag. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 This is a schematic diagram of the overall frontal view of the present invention.

[0024] Figure 3 This is a top-view structural diagram of the present invention.

[0025] Figure 4 This is a schematic diagram of the crushing and heating assembly structure of the present invention.

[0026] Figure 5 This is a schematic diagram of the inlet plate and inlet baffle structure.

[0027] Figure 6 This is a cross-sectional view of the rotating heating coil.

[0028] Figure 7 This is a schematic diagram of the solid filter ring and the crushing column structure.

[0029] Figure 8 This is a schematic diagram of the rotating heating coil structure.

[0030] Figure 9This is a schematic diagram of the power transmission component.

[0031] Figure 10 This is a sectional view of the steam tank and transport components.

[0032] Figure 11 This is a schematic diagram of a partial structure of the transport component.

[0033] Figure 12 This is a cross-sectional view of an irregular cylinder and a slab.

[0034] Figure 13 This is a schematic diagram of the structure of the water storage and filtration component and the water spraying and heat absorption component.

[0035] Figure 14 To collect component structure diagrams.

[0036] Figure 15 To collect component cross-sectional views.

[0037] Reference numerals: 2-Crushing and heating assembly; 3-Power transmission assembly; 4-Sprinkling and heat absorption assembly; 5-Transportation assembly; 6-Collection assembly; 7-Water storage and filtration assembly; 101-Motor; 201-Rotating heating ring; 202-Heating water tank; 203-Outlet plate; 204-Inlet plate; 205-Inlet baffle; 206-Solid filter ring; 207-Crushing column; 208-Heat transfer pipe; 209-Steam transfer pipe; 210-Water tank support; 211-Water inlet; 212-Water outlet; 301-Bevel gear; 302-Compound gear; 303-Transmission gear; 304-Belt I; 305-L-shaped support; 306-Bevel gear support; 307-Gear support; 308-Drive gear Wheel; 309-Long rod; 310-Rod support; 311-Belt II; 312-Belt III; 313-Belt IV; 401-Steam box; 402-Steam pipe; 403-Sprinkler pipe; 404-Pressure pipe; 501-Driving wheel; 502-Driven wheel; 503-Conveyor belt; 504-Slanted box; 505-Irregular cylinder; 506-Shaking plate; 601-Iron and steel slag scraper; 602-Waste steel slag scraper; 603-Waste collection box; 604-Iron and steel slag collection box; 605-Magnetic support; 606-Magnetic cylinder; 701-Circulating water tank; 702-Water filter plate; 703-Water delivery L-pipe; 704-Water pump; 801-Heat exchanger I; 802-Heat exchanger II. Detailed Implementation

[0038] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0039] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0040] Example: Figures 1-8 The motor 101 shown is fixedly connected to a crushing column 207 and an outlet plate 203. The circulating water tank 701 is fixedly connected to a steam tank 401 and a magnetic support 605. The motor 101 is rotatably connected to a power transmission assembly 3. The power transmission assembly 3 is rotatably connected to a crushing heating assembly 2. The other end of the power transmission assembly 3 is rotatably connected to a transport assembly 5. The transport assembly 5 is fixedly connected to a collection assembly 6. The transport assembly 5 is rotatably connected to a water storage and filtration assembly 7. The transport assembly 5 is fixedly connected to a water spraying and heat absorption assembly 4. The crushing heating assembly 2 is used to crush steel slag and absorb heat. The power transmission assembly 3 is used for the transmission of the device. The water spraying and heat absorption assembly 4 is used for spraying water and absorbing steam. The transport assembly 5 is used for the transmission of steel slag. The collection assembly 6 is used to classify and collect welding slag. The water storage and filtration assembly 7 is used for pumping water and collecting water.

[0041] The crushing and heating assembly 2 includes a rotating heating ring 201, which is rotatably connected to an outlet plate 203 and an inlet plate 204. A solid filter ring 206 is fixedly connected to the inlet plate 204, and a crushing column 207 is rotatably connected to the solid filter ring 206. The crushing column 207 is fixedly connected to a motor 101. An inlet baffle 205 is rotatably connected to the inlet plate 204. An inclined box 504 is fixedly connected to the outlet plate 203, and a water tank support 210 is fixedly connected to the inclined box 504. A heating water tank 202 is fixedly connected to the water tank support 210, and a steam conveying pipe 209, a water inlet 211, and a water outlet 212 are fixedly connected to the heating water tank 202. Motor 101 drives the crushing column 207 to rotate. The rotation of motor 101 drives the rotation of transmission gear 303. Transmission gear 303 meshes with compound gear 302. Transmission gear 303 is fixedly connected to long rod 309. The two drive gears 308 of long rod 309 mesh with the rotating heating ring 201 and rotate. Solid filter ring 206 is fixed on inlet plate 204 and outlet plate 203. Rotating heating ring 201 rotates on inlet plate 204 and outlet plate 203. Outlet plate 203 and inlet plate 204 are fixed. Heating water tank 202 and... The rotating heating ring 201 is fitted with a clearance fit. The heating water tank 202 is fixed on the water tank support 210. The inlet baffle 205 is rotatably connected to the inlet plate 204, preventing slag from coming out of the tank. The outlet plate 203 and the inlet plate 204 are fixed on the water tank support 210. The heat transfer pipe 208 connects the rotating heating ring 201 and the heating water tank 202, allowing steam to rise to the heating water tank 202. The water inlet 211 is connected to the heating water tank 202 for water injection. The heating water tank 202 has two symmetrically arranged water outlets 212 for drainage. A steam delivery pipe 209 is connected to the heating water tank 202 to transfer steam from the heating water tank 202 to the heat exchanger I 801.

[0042] like Figure 9The power transmission assembly 3 shown includes a belt I 304, which is rotatably connected to a motor 101 and a transmission gear 303. The transmission gear 303 is rotatably connected to a gear support 307. The transmission gear 303 meshes with a compound gear 302. A long rod 309 is fixedly connected to the compound gear 302. Two drive gears 308 are fixedly connected to the long rod 309, and a rod support 310 is rotatably connected to it. The compound gear 302 meshes with a bevel gear 301 power transmission assembly 9. An L-shaped support 305 and a bevel gear support 306 are rotatably connected to the bevel gear 301. Motor 101 rotates, driving belt I 304. Belt I 304 drives transmission gear 303 to rotate. Transmission gear 303 meshes with compound gear 302. Compound gear 302 meshes with power transmission assembly 9 of bevel gear 301. Transmission gear 303 is rotatably mounted on gear support 307. Long rod 309 is rotatably mounted on rod support 310. Bevel gear 301 is rotatably mounted on bevel gear support 306 and L-shaped support 305. Bevel gear 301 drives belt II 311 and belt IV 313 to rotate.

[0043] like Figures 10-13The water spraying heat absorption assembly 4 shown includes a steam box 401, on which a steam pipe 402 and a water spraying pipe 403 are fixedly connected. Two pressurizing pipes 404 are threadedly connected to the water spraying pipe 403, and a water pump 704 is connected to the pressurizing pipes 404. The transport assembly 5 includes a drive wheel 501, which is rotatably connected to a conveyor belt 503. The conveyor belt 503 is rotatably connected to the driven wheel 502. An inclined box 504 is fixedly connected to the outlet plate 203. A shaking plate 506 and an irregular cylinder 505 are rotatably connected to the inclined box 504. The water storage and filtration assembly 7 includes a circulating water tank 701, on which a water filter plate 702 and a water delivery L pipe 703 are fixedly connected. A drive gear 308009 is fixedly connected to the water delivery L pipe 703, and a belt II 311 is rotatably connected to it. The other side of the belt II 311 is rotatably connected to the drive wheel 501. Steam box 401 is fixedly installed on circulating water tank 701 to prevent steel slag from falling onto conveyor belt 503. Water from pressurization pipe 404 is delivered to sprinkler pipe 403, and the water in sprinkler pipe 403 is evenly sprayed onto the steel slag. Water vapor is collected from steam pipe 402 to heat exchanger II 802. Belt II 311 drives drive wheel 501 to rotate, which in turn drives conveyor belt 503 and driven wheel 502 to rotate. Drive wheel 501 drives irregular cylinder 505 to rotate. The cylinder 505 is installed on the inclined box 504, and the inclined box 504 is equipped with a shaking plate 506. The irregular cylinder 505 rotates, causing the shaking plate 506 to shake up and down. The circulating water tank 701 is filled with water, and the water in the circulating water tank 701 is sent to the pressurization pipe 404 through the water pump 704 and the water delivery L pipe 703. The water that is sprayed onto the steel slag but has not evaporated will flow from the conveyor belt 503 to the water filter plate 702, and then flow back to the circulating water tank 701 for recycling.

[0044] like Figures 14-15 The collection component 6 shown includes a magnetic cylinder 606, which is rotatably connected to a magnetic support 605. The magnetic support 605 is fixedly connected to a circulating water tank 701. The collection component 6 also includes a waste steel slag scraper 602, a waste collection box 603 slidably connected to the waste steel slag scraper 602, an iron steel slag scraper 601 fixedly connected to the waste steel slag scraper 602, an iron steel slag collection box 604 slidably connected to the iron steel slag scraper 601, and a belt IV 313 rotatably connected to the bevel gear 301. The other side of the belt IV 313 is rotatably connected to the magnetic cylinder 606. The bevel gear 301 rotates, driving the belt IV 313. The belt IV 313 drives the magnetic cylinder 606 to rotate on the magnetic support 605. The magnetic cylinder 606 attracts the iron-containing steel slag. The rotation of the magnetic cylinder 606 scrapes the iron-containing steel slag off the iron-steel slag scraper 601, and it falls into the iron-steel slag collection box 604. The steel slag without iron will be scraped off the conveyor belt 503 by the waste steel slag scraper 602 and fall into the waste collection box 603, thus achieving classified storage.

[0045] Working principle: The outlet plate 203 and inlet plate 204 are installed on the water tank support 210. Steel slag is poured in through the inlet plate 204. The inlet baffle 205 opens due to the weight of the steel slag, causing it to fall onto the solid filter ring 206. The inlet baffle 205 then closes. The motor 101 is turned on, and the crushing column 207 begins to rotate, breaking up the steel slag. The broken steel slag passes through the holes in the solid filter ring 206 and falls onto the rotating heating ring 201. The heat from the steel slag is transferred to the rotating heating ring 201, which in turn heats the heating water tank 202 above it. Simultaneously, hot air is transferred to the heating water tank 202 via the heat transfer pipe 208. Water is poured into the heating water tank 202 through the inlet 211. The heating water tank 202 is heated and boils the water, which can then be used to heat the water. The water outlet 212 releases steam for use. The steam generated in the heating water tank 202 will be transported to the heat exchanger I 801 via the steam delivery pipe 209. The rotation of the motor 101 will also drive the belt I 304 to rotate, which in turn drives the transmission gear 303. The transmission gear 303 is mounted on the gear support 307 and meshes with the compound gear 302. As the compound gear 302 rotates, the long rod 309 also rotates. The drive gear 308 on the long rod 309 rotates, driving the rotation of the rotating heating ring 201, which evenly transfers the heat of the steel slag to the heating water tank 202 and causes the steel slag to fall from the outlet plate 203 onto the shaking plate 506. The compound gear 302 meshes with the bevel gear 301 power transmission assembly 9. The drive belt II 311 is connected to the drive wheel 501 at the other end. The rotation of the drive wheel 501 drives the rotation of the conveyor belt 503, which in turn drives the driven wheel 502. The rotation of the drive wheel 501 drives the belt III 312, the other end of which is connected to an irregular cylinder 505. The irregular cylinder 505 is mounted on the inclined box 504. The rotation of the irregular cylinder 505 causes the shaking plate 506 mounted on the inclined box 504 to shake up and down, shaking the steel slag onto the conveyor belt 503. When the steel slag is on the conveyor belt 503, it passes through the steam box 401, the water pump 704, and the water delivery pipe 703, which transfers the crushing and heating component 0201 in the circulating water tank 701 to the pressurization pipe 404. The water in the pressurization pipe 404 flows to the sprinkler pipe 4. 03. Water is evenly sprayed from the sprinkler pipe 403 onto two fine slots on the steam box 401, and then sprayed onto the steel slag on the conveyor belt 503, cooling it and generating a large amount of steam. The steam rises from the large slot on the steam box 401 to the steam pipe 402, and is discharged from the steam pipe 402 to the heat exchanger II 802. Water that is not completely evaporated flows from the conveyor belt 503 onto the water filter plate 702. After being filtered by the water filter plate 702, the water flows back to the circulating water tank 701 for recycling without waste. The cooled steel slag continues to move forward on the conveyor belt 503. The bevel gear 301 drives the belt IV 313, which in turn drives the magnetic cylinder 606 to rotate on the magnetic support 605. When the steel slag on the conveyor belt 503 passes the magnetic cylinder 606...The magnetic cylinder 606 attracts iron-containing steel slag. As the magnetic cylinder 606 rotates, it scrapes the iron-containing steel slag off onto the iron-slag scraper 601, causing it to fall into the iron-slag collection bin 604 for storage. Iron-free steel slag is scraped off by the waste steel slag scraper 602 on the conveyor belt 503 and falls into the waste collection bin 603, achieving classified storage.

[0046] This invention is not limited to the specific embodiments described above. Any modifications made by those skilled in the art based on the above concept without creative effort are within the protection scope of this invention.

Claims

1. A waste heat recovery and utilization device for steel slag, comprising a motor (101) and a circulating water tank (701), characterized in that: A crushing column (207) and an outlet plate (203) are fixedly connected to the motor (101). A steam box (401) and a magnetic support (605) are fixedly connected to the circulating water tank (701). A power transmission component (3) is rotatably connected to the motor (101). A crushing heating component (2) is rotatably connected to the power transmission component (3). A transport component (5) is rotatably connected to the other end of the power transmission component (3). A collection component (6) is fixedly connected to the transport component (5). A water storage and filtration component (7) is rotatably connected to the transport component (5). A water spraying and heat absorption component (4) is fixedly connected to the transport component (5). The crushing heating component (2) is used to crush steel slag and absorb heat. The power transmission component (3) is used for the transmission of the device. The water spraying and heat absorption component (4) is used for spraying water and absorbing steam. The transport component (5) is used for the transmission of steel slag. The collection component (6) is used for classifying and collecting welding slag. The water storage and filtration component (7) is used for pumping water and collecting water. The crushing heating assembly (2) includes a rotating heating ring (201), which is rotatably connected to an outlet plate (203) and an inlet plate (204). A solid filter ring (206) is fixedly connected to the inlet plate (204), and a crushing column (207) is rotatably connected to the solid filter ring (206). The crushing column (207) is fixedly connected to a motor (101). An inlet baffle (205) is rotatably connected to the inlet plate (204). An inclined box (504) is fixedly connected to the outlet plate (203). A water tank support (210) is fixedly connected to the inclined box (504). A heating water tank (202) is fixedly connected to the water tank support (210). A steam conveying pipe (209), a water inlet (211), and a water outlet (212) are fixedly connected to the heating water tank (202). The power transmission assembly (3) includes a belt I (304), which is rotatably connected to a motor (101) and a transmission gear (303). The transmission gear (303) is rotatably connected to a gear support (307). The transmission gear (303) meshes with a compound gear (302). A long rod (309) is fixedly connected to the compound gear (302). Two drive gears (308) are fixedly connected to the long rod (309), which is rotatably connected to a rod support (310). The compound gear (308) is rotatably connected to the long rod (309). 2) Meets with bevel gear (301), and L-shaped support (305) and bevel gear support (306) are rotatably connected to bevel gear (301); drive gear (308) meshes with rotating heat ring (201) gear, belt II (311) is rotatably connected to bevel gear (301), the other side of belt II (311) is rotatably connected to drive wheel (501), belt IV (313) is rotatably connected to bevel gear (301), the other side of belt IV (313) is rotatably connected to magnet cylinder (606); The transport component (5) includes a drive wheel (501), which is rotatably connected to a conveyor belt (503). The conveyor belt (503) is rotatably connected to a driven wheel (502). A slanted box (504) is rotatably connected to a shaking plate (506) and an irregular cylinder (505).

2. The waste heat recovery and utilization device for steel slag according to claim 1, characterized in that: The water spraying heat absorption component (4) includes a steam box (401), a steam pipe (402) and a water spraying pipe (403) are fixedly connected to the steam box (401), two pressure pipes (404) are threadedly connected to the water spraying pipe (403), and a water pump (704) is connected to the pressure pipe (404).

3. The waste heat recovery and utilization device for steel slag according to claim 2, characterized in that: The collection component (6) includes a magnetic cylinder (606), which is rotatably connected to a magnetic support (605). The magnetic support (605) is fixedly connected to a circulating water tank (701). The collection component (6) also includes a waste steel slag scraper (602), on which a waste collection box (603) is slidably connected. On the waste steel slag scraper (602), an iron steel slag scraper (601) is fixedly connected. On the iron steel slag scraper (601), an iron steel slag collection box (604) is slidably connected.

4. The waste heat recovery and utilization device for steel slag according to claim 3, characterized in that: The water storage and filtration assembly (7) includes a circulating water tank (701), a water filter plate (702) and a water delivery L pipe (703) are fixedly connected to the circulating water tank (701), and a water pump (704) is fixedly connected to the water delivery L pipe (703).

5. The waste heat recovery and utilization device for steel slag according to claim 4, characterized in that: A heat exchanger I (801) is fixedly connected to the steam conveying pipe (209), and a heat exchanger II (802) is fixedly connected to the steam pipe (402).

6. A method for recovering and utilizing waste heat from steel slag, using the apparatus described in claim 5, characterized in that, Includes the following steps: S1. Steel slag is loaded into a solid filter ring (206). After the crushing column (207) crushes the steel slag, the heat of the steel slag is transferred to the heating water tank (202). The heating water tank (202) transfers the steam to the heat exchanger I (801). S2. The steel slag is transported to the water spraying heat absorption component (4) by the conveyor belt (503), and water is sprayed by the water spraying pipe (403). A large amount of steam generated by the steel slag when it comes into contact with water is transported from the steam pipe (402) to the heat exchanger II (802). S3. The steel slag is carried to the magnetic cylinder (606) by the conveyor belt (503). The magnetic cylinder (606) adsorbs the steel slag with iron and then puts it into the iron steel slag collection box (604) to classify and store the steel slag.

Images