A method for highly efficient desulfurization of slag behind a converter

Abstract

The invention discloses a method for efficiently desulfurizing the slag after a converter, comprising the following steps: S1, starting a moving motor, the moving motor drives a camera to move toward the top of a converter mouth, the camera observes the oil scale on the surface of molten steel inside the converter, and determines the sulfur content in the molten steel; S2, starting an electric push rod, the desulfurizer is driven by flowing nitrogen, and the powdered desulfurizer is sprayed into the molten steel inside the converter through a spray head to increase the alkalinity of the slag; the invention takes away a large amount of heat of a cooling water pipe and a nitrogen delivery pipe through water vaporization, protects the cooling water pipe and the nitrogen delivery pipe, prolongs the service life of the cooling water pipe and the nitrogen delivery pipe, enables the cooling water pipe and the nitrogen delivery pipe to be stirred in the molten steel for a long time, and is convenient for continuous desulfurization of the molten steel. At the same time, a rotating pipe drives the cooling water pipe and the nitrogen delivery pipe to rotate, stirs the molten steel, and cooperates with nitrogen as a stirring medium during the smelting process to accelerate the mixing speed of the desulfurizer, slag and molten steel, and further improves the desulfurization efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of steelmaking equipment, and specifically provides an efficient desulfurization method for slag behind a converter furnace. Background Art

[0002] Sulfur has an adverse effect on the properties of steel. When the sulfur content in steel is high, it will deteriorate the hot working performance of the steel, that is, cause the "hot brittleness" of the steel. Sulfur exists in the steel in the form of FeS. To improve the quality of molten steel, it is necessary to stir and add desulfurizing agents to increase the alkalinity of the slag to achieve the purpose of efficient desulfurization.

[0003] In the Chinese patent application No. 202222490601.8, there is mentioned "a converter slag washing desulfurization device". Although this device can stir the molten steel in the converter, the stirring method is single and it cannot well make the slag and molten steel fully contact.

[0004] The existing stirring method is to introduce nitrogen into the molten steel in the converter. Nitrogen is used as a stirring medium to stir the molten steel and the slag. The device for introducing nitrogen is in a fixed state and only uses the ejected nitrogen for stirring. It cannot make the molten steel and the slag quickly and fully contact. The traditional stirring equipment has a single stirring method and low heat resistance, and cannot stir in the molten steel for a long time, which is not conducive to the continuous desulfurization of the molten steel and affects the desulfurization efficiency of the molten steel. Summary of the Invention

[0005] The present invention provides an efficient desulfurization method for slag behind a converter furnace, which can effectively solve the problem in the above background art that the existing stirring method is to introduce nitrogen into the molten steel in the converter. Nitrogen is used as a stirring medium to stir the molten steel and the slag. The device for introducing nitrogen is in a fixed state and only uses the ejected nitrogen for stirring. It cannot make the molten steel and the slag quickly and fully contact. The traditional stirring equipment has a single stirring method and low heat resistance, and cannot stir in the molten steel for a long time, which is not conducive to the continuous desulfurization of the molten steel and affects the desulfurization efficiency of the molten steel.

[0006] To achieve the above object, the present invention provides the following technical solution: An efficient desulfurization method for slag behind a converter furnace, comprising the following steps:

[0007] S1. Start the moving motor. The moving motor drives the moving gear to rotate. Under the action of gear meshing, the moving rack drives the camera to move towards the top of the converter opening. Use the camera to observe the skin condition on the surface of the molten steel inside the converter and judge the sulfur content in the molten steel.

[0008] S2. During desulfurization, the electric push rod is started. The electric push rod moves the baffle plate out of the metering pipe. The desulfurizer enters the gap between the crushing hopper and the crushing cone from the storage tank. The lumpy desulfurizer is crushed by the crushing cone and then falls to the inner bottom of the crushing tank. Nitrogen flows rapidly through the spray pipe. Driven by the flowing nitrogen, the powdered desulfurizer enters the conveying pipe through the discharge port and is finally sprayed into the molten steel inside the converter through the spray head, improving the basicity of the slag.

[0009] S3. The drive motor is started. The drive motor drives the rotating shaft to rotate reciprocally. The rotating shaft drives the rotating pipe to rotate reciprocally, and then drives the stirring plate to rotate, stirring the molten steel, desulfurizer and slag in the converter.

[0010] S4. The rotating shaft drives the strengthening gear to rotate. Under the meshing action of the gears, the turntable is driven to rotate. The rotation of the turntable drives the adjusting rack to move up and down reciprocally under the connection of the connecting rod and the pull rod. The adjusting rack drives the rotating pipe to rotate, and the rotating pipe drives the stirring plate to rotate. The change in the position of the stirring plate changes the fluidity of the molten steel and slag in the converter.

[0011] S5. Nitrogen enters the inside of the rotating pipe from the nitrogen supply branch pipe, enters the inside of the stirring plate through the air inlet holes on the rotating pipe, and is finally discharged through the jet head. Cooperating with the rotating cooling water pipe, the stirring operation is completed.

[0012] Preferably, a converter is installed on the top of the base. A stirring and desulfurization assembly is arranged on the top of the converter. The stirring and desulfurization assembly includes a lifting cylinder.

[0013] A lifting cylinder is installed on one side of the converter. The output end of the top of the lifting cylinder is installed with a support frame. One end of the top of the support frame is installed with a drive motor. The rotating output end of the drive motor is connected with a drive gear. The other end of the support frame is rotatably installed with a rotating shaft. The top of the rotating shaft is connected with a driven gear. A chain belt is connected between the drive gear and the driven gear.

[0014] The bottom of the rotating shaft is connected with a strengthening gear. The bottom of the strengthening gear is connected with a rotating seat. The bottom of the rotating seat is connected with a rotating pipe. The top end of the support frame is rotatably installed with a connecting gear. The strengthening gear and the connecting gear are meshed with each other. The bottom of the connecting gear is connected with a main bevel gear. A sub-bevel gear is rotatably installed on one side of the rotating seat. The main bevel gear and the sub-bevel gear are meshed with each other. A turntable is rotatably installed on the other side of the rotating seat. The sub-bevel gear and the turntable are fixedly connected.

[0015] An adjusting rack is slidably installed inside the rotating pipe. A sealing plate is installed at the top of one side of the adjusting rack. A moving port is opened at the position of the rotating pipe corresponding to the sealing plate. A pull rod is installed on one side of the sealing plate. The pull rod penetrates through the moving port. A connecting rod is rotatably connected between the turntable and the pull rod.

[0016] On both sides of the bottom of the rotating tube, rotating sleeves are evenly installed. Between the interiors of two rotating sleeves located in the same plane, a rotating tube is rotatably installed. An adjusting gear is installed in the middle of the rotating tube, and a stirring plate is installed at the top of the rotating tube;

[0017] At the bottom of the support frame, a support ring is installed. Inside the support ring, a limiting wheel is embedded. The bottom of the limiting wheel is rotatably connected to a connecting seat. One side of the connecting seat is connected to the top of one side of the rotating tube. The bottom of the connecting seat is connected to a nitrogen delivery pipe. Inside the connecting seat, a nitrogen supply pipe is installed. One end of the nitrogen supply pipe penetrates through the connecting seat and is connected to the top of the nitrogen delivery pipe in communication. A cooling water pipe is sleeved outside the nitrogen delivery pipe. Between both sides of the nitrogen delivery pipe and the cooling water pipe, a partition plate is welded. A through hole is opened at the bottom of the partition plate. On both sides of the nitrogen delivery pipe, blocking blocks are evenly welded. One side of the top of the cooling water pipe is connected to a water inlet pipe, and the other side of the top of the cooling water pipe is connected to a water outlet pipe;

[0018] An electric valve is installed outside the water outlet pipe. The top of the water outlet pipe is connected to a buffer cylinder. Inside the buffer cylinder, a buffer plug is slidably installed. At the top of the buffer plug, a knocking block is installed. One side of the top of the cooling water pipe is connected to a vibrating rod. The top of the vibrating rod penetrates through the top of the buffer cylinder. Steam discharge holes are evenly opened around the top of the buffer cylinder.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. A stirring desulfurization component is provided. During the process of cooling water transportation, the external circulating water pump and the electric valve are periodically and briefly paused. The external circulating water pump is instantly paused from transporting cooling water, and the electric valve is instantly closed. Part of the water in the cooling water pipe vaporizes into water vapor at a high temperature state. The vaporization of water takes away a large amount of heat from the cooling water pipe and the nitrogen delivery pipe, playing a protective role for the cooling water pipe and the nitrogen delivery pipe, enabling them to stir in the molten steel for a long time. Moreover, the air pressure in the cooling water pipe increases, and the water vapor impacts the buffer plug in the buffer cylinder. The buffer plug quickly rises, and the knocking block knocks the vibrating rod. The water vapor overflows from the steam discharge holes. Under the conduction action of the vibrating rod, the cooling water pipe vibrates, so as to prevent the water scale in the cooling water from remaining inside the cooling water pipe and hindering the subsequent flow of cooling water, extending the service life of the cooling water pipe and the nitrogen delivery pipe, and facilitating the continuous desulfurization of the molten steel;

[0021] While the driving motor drives the rotating shaft and the rotating tube to rotate, the rotating shaft drives the strengthening gear to rotate. Under the action of gear meshing, the turntable is driven to rotate. The rotation of the turntable drives the adjusting rack to reciprocate up and down under the connection of the connecting rod and the pull rod. The adjusting rack drives the rotating tube to rotate, and the rotation of the rotating tube drives the stirring plate to rotate, enabling the slag to contact the molten steel in each part faster and improving the stirring efficiency of the stirring plate;

[0022] The rotating pipe drives the cooling water pipe and the nitrogen delivery pipe to rotate simultaneously, stirring the molten steel. In coordination with an external nitrogen pump, nitrogen is delivered into the nitrogen delivery pipe and finally discharged from the bottom of the nitrogen delivery pipe into the molten steel. Nitrogen acts as a stirring medium during the smelting process, accelerating the mixing speed of the desulfurizer, slag, and molten steel, and further improving the desulfurization efficiency.

[0023] 2. A control feeding component is provided. When there is a skin on the surface of the molten steel, the electric push rod moves the baffle plate out of the metering pipe. The desulfurizer enters the gap between the crushing hopper and the crushing cone from the storage bin. The powdered desulfurizer directly falls from the discharge hole on the surface of the crushing hopper into the inner bottom of the crushing tank. The caked desulfurizer falls into the smaller gap at the bottom between the crushing hopper and the crushing cone under the action of gravity. The rotating shaft rotates, and the crushing cone is driven to rotate under the connection of the connecting belt to crush the caked desulfurizer, preventing the caked desulfurizer from directly contacting the molten steel and enabling the desulfurizer to react with the sulfur in the molten steel quickly and fully. The external nitrogen pump starts, and nitrogen flows rapidly through the air injection pipe. Driven by the flowing nitrogen, the powdered desulfurizer enters the feeding pipe through the discharge port and is finally sprayed into the converter interior through the spraying head. In coordination with the rotating pipe driving the spraying head to rotate, the desulfurizer can be evenly added to the molten steel, improving the quality of desulfurization of the molten steel.

[0024] In summary, during steelmaking, the moving rack drives the camera to move towards the top of the converter opening. The camera observes the skin condition on the surface of the molten steel in the converter, judges the sulfur content in the molten steel, controls the addition amount of the desulfurizer according to the sulfur content, and increases the basicity of the slag. After the stirring desulfurization component stirs sufficiently, the camera is used to observe the skin condition on the surface of the molten steel, and whether the stirring desulfurization component continues to stir is controlled according to the desulfurization effect. At the same time, the operator can accurately control the addition amount of the desulfurizer according to the sulfur content of the molten steel, avoiding an excessive increase in the slag viscosity due to too high basicity, deteriorating the kinetic conditions of slag desulfurization, and affecting the desulfurization effect, enabling the control feeding component and the stirring desulfurization component to play a better role. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0026] Figure 1 is a schematic diagram of the steps of the desulfurization method of the present invention;

[0027] Figure 2 is a three-dimensional structure diagram of the present invention;

[0028] Figure 3 is a schematic diagram of the installation structure of the driving motor of the present invention;

[0029] Figure 4 is a schematic diagram of the structure of the stirring desulfurization component of the present invention;

[0030] Figure 5 It is a schematic diagram of the installation structure of the rotating tube of the present invention;

[0031] Figure 6 It is a schematic diagram of the installation structure of the adjusting rack of the present invention;

[0032] Figure 7 It is a schematic diagram of the installation structure of the turntable of the present invention;

[0033] Figure 8 It is a schematic diagram of the installation structure of the buffer cylinder of the present invention;

[0034] Figure 9 It is a schematic diagram of the structure of the control feeding assembly of the present invention;

[0035] Figure 10 It is a schematic diagram of the installation structure of the crushing hopper of the present invention;

[0036] Figure 11 It is a schematic diagram of the installation structure of the crushing cone of the present invention;

[0037] Reference numerals in the figure: 1, base; 2, converter;

[0038] 3, stirring desulfurization assembly; 301, lifting cylinder; 302, support frame; 303, drive motor; 304, drive gear; 305, rotating shaft; 306, driven gear; 307, strengthening gear; 308, rotating seat; 309, rotating tube; 310, connecting gear; 311, main bevel gear; 312, sub-bevel gear; 313, turntable; 314, connecting rod; 315, adjusting rack; 316, sealing plate; 317, moving port; 318, pull rod; 319, ball; 320, rotating sleeve; 321, rotating tube; 322, adjusting gear; 323, stirring plate; 324, support ring; 325, limiting wheel; 326, connecting seat; 327, nitrogen delivery pipe; 328, isolation plate; 329, cooling water pipe; 330, through port; 331, blocking block; 332, nitrogen supply pipe; 333, water inlet pipe; 334, water outlet pipe; 335, electric valve; 336, buffer cylinder; 337, buffer plug; 338, knocking block; 339, vibrating rod; 340, nitrogen supply branch pipe; 341, air inlet hole; 342, jet head; 343, chain belt; 344, steam discharge hole.

[0039] 4. Control feeding assembly; 401. Moving motor; 402. Moving gear; 403. Sliding frame; 404. Moving rack; 405. Limiting strip; 406. Camera; 407. Wire tube; 408. Isolation tube; 409. Mounting frame; 410. Heat insulation box; 411. Storage box; 412. Dosing tube; 413. Feeding tube; 414. Crushing tank; 415. Crushing bucket; 416. Discharge hole; 417. Crushing cone; 418. Connecting shaft; 419. Driven wheel; 420. Driving wheel; 421. Connecting belt; 422. Discharge port; 423. Jet tube; 424. Spray head; 425. Electric push rod; 426. Shielding plate. DETAILED DESCRIPTION

[0040] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0041] Example: Figure 1 As shown;

[0042] The present invention provides a technical solution for a high-efficiency desulfurization method for converter slag, and the high-efficiency desulfurization method for converter slag comprises the following steps:

[0043] S1, start the mobile motor 401, the mobile motor 401 drives the mobile gear 402 to rotate, and under the meshing action of the gears, the mobile rack 404 drives the camera 406 to move to the top of the converter 2, and use the camera 406 to observe the oil scale on the surface of the molten steel inside the converter 2 to determine the sulfur content in the molten steel;

[0044] S2, during desulfurization, the electric push rod 425 is started, and the electric push rod 425 moves the shielding plate 426 out of the quantitative tube 412, and the desulfurizer enters the gap between the crushing bucket 415 and the crushing cone 417 from the storage box 411. The block desulfurizer falls into the inner bottom of the crushing tank 414 after being crushed by the crushing cone 417, and the nitrogen flows quickly from the injection pipe 423. Driven by the flowing nitrogen, the powdered desulfurizer enters the feeding pipe 413 through the discharge port 422 and is finally sprayed out through the spray head 424 into the molten steel inside the converter 2 to increase the basicity of the slag;

[0045] S3, the driving motor 303 is started, the driving motor 303 drives the rotating shaft 305 to reciprocate, the rotating shaft 305 drives the rotating tube 309 to reciprocate, and then drives the stirring plate 323 to rotate, so as to stir the molten steel, desulfurizer and slag in the converter 2;

[0046] S4. The rotating shaft 305 drives the reinforcing gear 307 to rotate. Under the action of gear meshing, the turntable 313 is driven to rotate. The rotation of the turntable 313 drives the adjusting rack 315 to reciprocate up and down under the connection of the connecting rod 314 and the pull rod 318. The adjusting rack 315 drives the rotating tube 321 to rotate, and the rotation of the rotating tube 321 drives the stirring plate 323 to rotate. The change in the position of the stirring plate 323 changes the fluidity of the molten steel and slag in the converter 2.

[0047] S5. Nitrogen enters the inside of the rotating tube 309 from the nitrogen supply branch pipe 340, enters the inside of the stirring plate 323 through the air inlet hole 341 on the rotating tube 321, and finally is discharged through the air jet head 342, and cooperates with the rotating cooling water pipe 329 to complete the stirring operation.

[0048] As Figures 2 - 10 shown;

[0049] A converter 2 is installed on the top of the base 1. A stirring and desulfurization assembly 3 is arranged on the top of the converter 2. The stirring and desulfurization assembly 3 includes a lifting cylinder 301, a support frame 302, a driving motor 303, a driving gear 304, a rotating shaft 305, a driven gear 306, a reinforcing gear 307, a rotating seat 308, a rotating tube 309, a connecting gear 310, a main bevel gear 311, a sub-bevel gear 312, a turntable 313, a connecting rod 314, an adjusting rack 315, a sealing plate 316, a moving port 317, a pull rod 318, a ball 319, a rotating sleeve 320, a rotating tube 321, an adjusting gear 322, a stirring plate 323, a support ring 324, a limiting wheel 325, a connecting seat 326, a nitrogen delivery pipe 327, a partition plate 328, a cooling water pipe 329, a through port 330, a blocking block 331, a nitrogen supply pipe 332, a water inlet pipe 333, a water outlet pipe 334, an electric valve 335, a buffer cylinder 336, a buffer plug 337, a knocking block 338, a vibrating rod 339, a nitrogen supply branch pipe 340, an air inlet hole 341, an air jet head 342, a chain belt 343 and a steam discharge hole 344.

[0050] A lifting cylinder 301 is installed on one side of the converter 2. The output end of the top of the lifting cylinder 301 is installed with a support frame 302. One end of the top of the support frame 302 is installed with a driving motor 303. The rotating output end of the driving motor 303 is connected with a driving gear 304. The input end of the driving motor 303 is electrically connected with the output end of an external power supply. The other end of the support frame 302 is rotatably installed with a rotating shaft 305. The top of the rotating shaft 305 is connected with a driven gear 306. A chain belt 343 is connected between the driving gear 304 and the driven gear 306.

[0051] A reinforcing gear 307 is connected to the bottom of the rotating shaft 305. A rotating seat 308 is connected to the bottom of the reinforcing gear 307. A rotating tube 309 is connected to the bottom of the rotating seat 308. A connecting gear 310 is rotatably installed at the top end of the support frame 302. The reinforcing gear 307 meshes with the connecting gear 310. A main bevel gear 311 is connected to the bottom of the connecting gear 310. A sub-bevel gear 312 is rotatably installed on one side of the rotating seat 308. The main bevel gear 311 meshes with the sub-bevel gear 312. A turntable 313 is rotatably installed on the other side of the rotating seat 308. The sub-bevel gear 312 is fixedly connected to the turntable 313;

[0052] An adjusting rack 315 is slidably installed inside the rotating tube 309. A sealing plate 316 is installed at the top of one side of the adjusting rack 315. A moving port 317 is opened at the position of the rotating tube 309 corresponding to the sealing plate 316. The diameter of the moving port 317 is smaller than the longitudinal section diameter of the sealing plate 316. The sealing plate 316 plays a sealing role. When nitrogen is conveyed into the rotating tube 309, the adjusting rack 315 moves up and down inside the rotating tube 309, and nitrogen will not overflow from the position of the moving port 317. A pull rod 318 is installed on one side of the sealing plate 316. The pull rod 318 passes through the moving port 317. A connecting rod 314 is rotatably connected between the turntable 313 and the pull rod 318. Ball bearings 319 are evenly installed on both sides of the adjusting rack 315. The surfaces of the ball bearings 319 are in contact with both sides inside the rotating tube 309. When the adjusting rack 315 moves up and down inside the rotating tube 309, the ball bearings 319 can reduce the contact area between the adjusting rack 315 and the rotating tube 309, enabling the adjusting rack 315 to move more smoothly inside the rotating tube 309;

[0053] Rotating sleeves 320 are evenly installed on both sides of the bottom of the rotating tube 309. A rotating tube 321 is rotatably installed between the two rotating sleeves 320 in the same plane. An adjusting gear 322 is fixedly installed in the middle of the rotating tube 321. A stirring plate 323 is fixedly installed at the top of the rotating tube 321. The outside of the rotating tube 321 is closely attached to the inside of the rotating sleeve 320, preventing the molten steel in the converter 2 from entering the gap between the rotating tube 321 and the rotating sleeve 320. The contact surface between the rotating sleeve 320 and the rotating tube 321 is a smooth curved surface, reducing the friction between the rotating sleeve 320 and the rotating tube 321, enabling the rotating tube 321 to rotate more easily inside the rotating sleeve 320;

[0054] A support ring 324 is fixedly installed at the bottom of the support frame 302. A limiting wheel 325 is embedded inside the support ring 324. A connecting seat 326 is rotatably connected to the bottom of the limiting wheel 325. One side of the connecting seat 326 is fixedly connected to the top of one side of the rotating tube 309. The center of the support ring 324 coincides with the center line of the rotating shaft 305. When the driving motor 303 drives the rotating shaft 305 and the rotating tube 309 to rotate, the limiting wheel 325 can move smoothly inside the support ring 324;

[0055] A nitrogen delivery pipe 327 is fixedly connected to the bottom of the connection seat 326. A nitrogen supply pipe 332 is installed inside the connection seat 326. One end of the nitrogen supply pipe 332 penetrates through the connection seat 326 and is connected to the top of the nitrogen delivery pipe 327 in communication. The other end of the nitrogen supply pipe 332 is connected to the air outlet end of an external nitrogen pump. Nitrogen is transported into the nitrogen supply pipe 332, and the nitrogen is discharged from the bottom of the nitrogen delivery pipe 327 to transport nitrogen into the molten steel in the converter 2. Nitrogen acts as a stirring medium during the smelting process to accelerate the mixing speed of the desulfurizer and the molten steel;

[0056] A cooling water pipe 329 is sleeved outside the nitrogen delivery pipe 327. A refractory material is coated on the outside of the cooling water pipe 329. The refractory material plays a role in heat insulation protection to prevent the cooling water pipe 329 and the nitrogen delivery pipe 327 from being damaged due to overheating, and to prevent the molten steel from cooling due to the cooling of the cooling water pipe 329, which affects the smelting of the molten steel. Partition plates 328 are welded between both sides of the nitrogen delivery pipe 327 and the cooling water pipe 329. Through holes 330 are opened at the bottom of the partition plates 328. Blocking blocks 331 are evenly welded on both sides of the nitrogen delivery pipe 327. The blocking blocks 331 block the flowing cooling water, making the water present a turbulent state, causing the cooling water pipe 329 to vibrate, so that scale cannot easily adhere to the cooling water pipe 329 and the nitrogen delivery pipe 327. One side of the top of the cooling water pipe 329 is connected to a water inlet pipe 333, and the other side of the top of the cooling water pipe 329 is connected to a water outlet pipe 334. The partition plates 328 divide the cooling water pipe 329 into two spaces. When the cooling water enters the inside of the cooling water pipe 329 from the water inlet pipe 333, the cooling water enters the other side of the cooling water pipe 329 through the through hole 330 on one side of the cooling water pipe 329 and finally discharges from the water outlet pipe 334 to form a water cycle. The water inlet pipe 333 and the water outlet pipe 334 are connected to the output end of an external circulating water pump. The external circulating water pump transports the cooling water into the inside of the cooling water pipe 329 quickly through the water inlet pipe 333 and finally discharges it through the water outlet pipe 334. The cooling water cools down the nitrogen delivery pipe 327 to prevent the nitrogen delivery pipe 327 from being damaged due to excessive temperature;

[0057] An electric valve 335 is fixedly installed on the outside of the water outlet pipe 334. The input end of the electric valve 335 is electrically connected to the output end of the external power supply. The instantaneous on and off of the water outlet pipe 334 is controlled by controlling the electric valve 335 and the external circulating water pump. The electric valve 335 and the external circulating water pump operate synchronously. When the external circulating water pump delivers cooling water, the electric valve 335 is in an open state. When the external circulating water pump stops delivering cooling water, the electric valve 335 is in a closed state. A buffer cylinder 336 is connected to the top of the water outlet pipe 334. The buffer cylinder 336 has a A buffer plug 337 is slidably installed on the top of the buffer plug 337, and a knocking block 338 is installed on the top of the buffer plug 337. A vibration rod 339 is connected to one side of the top of the cooling water pipe 329. The top of the vibration rod 339 passes through the top of the buffer cylinder 336. Steam leakage holes 344 are evenly opened around the top of the buffer cylinder 336. When the buffer plug 337 rises to the top of the buffer cylinder 336, the evaporated water vapor can be discharged from the steam leakage holes 344, so as to avoid the accumulation of water vapor in the cooling water pipe 329, which will increase the pressure in the cooling water pipe 329 and cause damage to the cooling water pipe 329.

[0058] The external circulating water pump stops delivering cooling water instantly, and the electric valve 335 is closed instantly. The water in the cooling water pipe 329 is partially vaporized to generate water vapor under high temperature. The cooling water takes away a large amount of heat from the cooling water pipe 329 and the nitrogen delivery pipe 327, and protects the cooling water pipe 329 and the nitrogen delivery pipe 327. The water vapor in the cooling water pipe 329 impacts the buffer plug 337 in the buffer cylinder 336, and the buffer plug 337 rises rapidly. The knocking block 338 knocks the vibration rod 339. Under the conduction effect of the vibration rod 339, the cooling water pipe 329 is vibrated to prevent the scale in the cooling water from remaining in the cooling water pipe 329 to hinder the subsequent flow of cooling water, thereby extending the service life of the cooling water pipe 329 and the nitrogen delivery pipe 327.

[0059] A nitrogen delivery branch pipe 340 is connected between one side of the top of the rotating tube 309 and the nitrogen delivery pipe 332. An air inlet 341 is provided at both ends of the adjusting gear 322 in the middle of the rotating tube 321. A nozzle 342 is installed on one side of the stirring plate 323. The air inlet 341 and the adjacent nozzle 342 are interconnected. When nitrogen is transported to the inside of the nitrogen delivery pipe 332, the nitrogen can enter the inside of the rotating tube 309 from the nitrogen delivery branch pipe 340, and then enter the inside of the stirring plate 323 through the air inlet 341 on the rotating tube 321, and finally be discharged through the nozzle 342, so that the nitrogen can be mixed with the molten steel more quickly, further improving the stirring efficiency, making the desulfurization slag fully contact with the molten steel, and improving the desulfurization efficiency.

[0060] On one side of the support frame 302, a control feeding assembly 4 is provided. The control feeding assembly 4 includes a moving motor 401, a moving gear 402, a sliding frame 403, a moving rack 404, a limiting strip 405, a camera 406, a wire tube 407, an isolation tube 408, a mounting frame 409, a heat insulation box 410, a storage bin 411, a metering tube 412, a feeding tube 413, a crushing tank 414, a crushing hopper 415, a discharge hole 416, a crushing cone 417, a connecting shaft 418, a driven wheel 419, a driving wheel 420, a connecting belt 421, a discharge port 422, a jet pipe 423, a spraying head 424, an electric push rod 425 and a baffle plate 426;

[0061] A moving motor 401 is fixedly installed at the top of the support frame 302. The rotating output end of the moving motor 401 is connected to a moving gear 402. The input end of the moving motor 401 is electrically connected to the output end of an external power supply. A sliding frame 403 is installed on one side of the support frame 302. A moving rack 404 is slidably installed inside the sliding frame 403. The moving gear 402 meshes with the moving rack 404. Limiting strips 405 are welded on both sides of the moving rack 404. The limiting strips 405 are embedded in both sides inside the sliding frame 403. The moving gear 402 rotates driven by the moving motor 401. Under the action of gear meshing, the moving rack 404 is driven to move on the sliding frame 403. The contact surface between the limiting strip 405 and the sliding frame 403 is a smooth plane, which reduces the friction between the limiting strip 405 and the sliding frame 403, enables the moving rack 404 to move more smoothly on the sliding frame 403, and reduces the load of the moving motor 401. A camera 406 is installed at the bottom top of the limiting strip 405. The camera 406 is electrically connected to an external controller. The camera 406 shoots the skin on the surface of the molten steel inside the converter 2 to judge the sulfur content in the molten steel. When the sulfur content in the molten steel is low, there is no skin on the surface of the molten steel. When the sulfur content in the molten steel is high, there is skin on the surface of the molten steel;

[0062] A wire tube 407 is installed in the middle of the moving rack 404. An isolation tube 408 is sleeved outside the wire tube 407. The isolation tube 408 stores coolant inside. The wire connecting the camera 406 passes through the wire tube 407 and is connected to the camera 406. The isolation tube 408 isolates the external high temperature to prevent the insulation layer of the wire connecting the camera 406 from melting;

[0063] One end of the support frame 302 is provided with a mounting frame 409 at the top. The top of the mounting frame 409 is provided with a heat insulation box 410. Inside the heat insulation box 410, a material storage box 411 is installed. One side of the bottom of the material storage box 411 penetrates through the bottom of the heat insulation box 410 and is connected to a metering pipe 412. The bottom of the metering pipe 412 penetrates through the top surface of the mounting frame 409 and is connected to a feeding pipe 413. At the inner bottom of the heat insulation box 410, an electric push rod 425 is installed. The input end of the electric push rod 425 is electrically connected to the output end of an external power supply. A baffle plate 426 is slidably installed on one side of the metering pipe 412. The cross-sectional area of the baffle plate 426 is larger than that of the metering pipe 412. The electric push rod 425 controls the position of the baffle plate 426 in the metering pipe 412, controls the connectivity between the feeding pipe 413 and the material storage box 411, and thus controls the conveying amount of the desulfurizer. One side of the rotating pipe 309 is fixedly installed with a crushing tank 414. The bottom of the feeding pipe 413 is connected to one side of the top of the crushing tank 414;

[0064] Inside the crushing tank 414, a crushing hopper 415 is installed. Discharge holes 416 are arranged on the outer side of the crushing hopper 415. In the middle of the top of the crushing tank 414, a connecting shaft 418 is rotatably installed. The bottom of the connecting shaft 418 is connected to a crushing cone 417. The crushing cone 417 is embedded inside the crushing hopper 415. The inner surface of the crushing hopper 415 and the outer surface of the crushing cone 417 are both rough surfaces. The longitudinal cross-sectional shapes of the crushing hopper 415 and the crushing cone 417 are inverted isosceles triangles. The distance between the inner surface of the crushing hopper 415 and the outer surface of the crushing cone 417 gradually decreases from top to bottom. The desulfurizer enters the gap between the crushing hopper 415 and the crushing cone 417 from the material storage box 411 through the feeding pipe 413. The massive desulfurizer falls into the smaller gap at the bottom between the crushing hopper 415 and the crushing cone 417 under the action of gravity. The crushing cone 417 rotates to crush the massive desulfurizer, preventing the massive desulfurizer from directly entering the converter 2 and making the contact area between the desulfurizer and the molten steel larger. The top of the connecting shaft 418 is connected to a driven wheel 419. A driving wheel 420 is installed on the outside of the rotating shaft 305. A connecting belt 421 is wrapped between the driven wheel 419 and the driving wheel 420;

[0065] At the bottom of one side of the crushing tank 414, a discharge port 422 is arranged. The bottom surface of the crushing tank 414 is an inclined surface, and the discharge port 422 is located at the lowest point of the inclined surface, so that the crushed desulfurizer can be concentrated at the position of the discharge port 422, facilitating the discharge of the desulfurizer. A jet pipe 423 is fixedly installed outside the discharge port 422. One side of the jet pipe 423 is communicated with the discharge port 422. One end of the bottom of the jet pipe 423 is connected to a spray head 424. The other end of the jet pipe 423 is connected to the air outlet end of an external nitrogen pump.

[0066] Working principle and usage process of the present invention: Before steelmaking in the converter 2, the desulfurizer is placed in the storage bin 411. During steelmaking in the converter 2, the camera 406 is located outside the opening of the converter 2. A wire conduit 407 is installed in the middle of the moving rack 404. An isolation tube 408 is sleeved outside the wire conduit 407. The isolation tube 408 stores coolant inside. The wire connecting the camera 406 passes through the wire conduit 407 and is connected to the camera 406. The isolation tube 408 isolates the external high temperature to prevent the insulation layer of the wire connecting the camera 406 from melting;

[0067] During steelmaking, the moving motor 401 is started. The moving motor 401 drives the moving gear 402 to rotate. Under the action of gear meshing, the moving rack 404 is driven to move on the sliding frame 403. The moving rack 404 drives the camera 406 to move towards the top of the opening of the converter 2. The camera 406 is used to observe the skin on the surface of the molten steel inside the converter 2 to judge the sulfur content in the molten steel. When the sulfur content in the molten steel is low, there is no skin on the surface of the molten steel. When the sulfur content in the molten steel is high, there is skin on the surface of the molten steel. After observing with the camera 406, the output end of the moving motor 401 rotates in the reverse direction. The moving gear 402 drives the moving rack 404 to move, so that the camera 406 is separated from above the opening of the converter 2, avoiding the high temperature at the top of the opening of the converter 2 from contacting the camera 406 for a long time during steelmaking in the converter 2, playing a protective role for the camera 406;

[0068] When there is skin on the surface of the molten steel, the electric push rod 425 is started. The electric push rod 425 moves the baffle 426 out of the metering tube 412, so that the material conveying pipe 413 is communicated with the storage bin 411. The desulfurizer enters the gap between the crushing hopper 415 and the crushing cone 417 from the storage bin 411. The powdery desulfurizer falls into the inner bottom of the crushing tank 414 from the discharge hole 416 on the surface of the crushing hopper 415;

[0069] The massive desulfurizer falls into the smaller gap at the bottom between the crushing hopper 415 and the crushing cone 417 under the action of gravity. The driving wheel 420 drives the driven wheel 419 and the crushing cone 417 to rotate to crush the massive desulfurizer. Finally, the crushed desulfurizer falls into the inner bottom of the crushing tank 414 from the discharge hole 416. The external nitrogen pump is started. The air outlet end of the external nitrogen pump is connected to the spray pipe 423. Nitrogen flows rapidly through the spray pipe 423. Driven by the flowing nitrogen, the powdery desulfurizer enters the material conveying pipe 413 through the discharge port 422 and is finally sprayed into the molten steel inside the converter 2 through the spray head 424, avoiding the direct contact between the agglomerated desulfurizer and the molten steel and enabling the desulfurizer to react with the molten steel quickly and fully;

[0070] Meanwhile, the driving motor 303 starts, and the rotating output end of the driving motor 303 drives the driving gear 304 to rotate forward and backward reciprocally. Driven by the chain belt 343, the driven gear 306 rotates, and then drives the rotating shaft 305 to rotate. The rotation of the rotating shaft 305 drives the rotating tube 309 connected to the bottom to rotate reciprocally. The rotating tube 309 drives the stirring plate 323 to rotate, stirring the molten steel, desulfurizer, and slag in the converter 2. The stirring plate 323 rotates reciprocally, changing the stirring direction of the molten steel, enhancing the flow of the molten steel, enabling the slag to flow everywhere in the molten steel, increasing the contact area between the slag and the molten steel, and improving the desulfurization efficiency;

[0071] While the rotating shaft 305 drives the rotating tube 309 to rotate, it drives the strengthening gear 307 to rotate. The rotation of the strengthening gear 307 drives the meshing connecting gear 310 to rotate. The rotation of the connecting gear 310 synchronously drives the main bevel gear 311 at the bottom to rotate. The rotation of the main bevel gear 311 drives the meshing sub-bevel gear 312 to rotate. The sub-bevel gear 312 is connected to the turntable 313, and then drives the turntable 313 to rotate. The ball 319 restricts the position of the adjusting rack 315. The rotation of the turntable 313 drives the adjusting rack 315 to move up and down stably reciprocally under the connection of the connecting rod 314 and the pull rod 318. The ball 319 reduces the contact area between the adjusting rack 315 and the rotating tube 309, enabling the adjusting rack 315 to move more smoothly in the rotating tube 309;

[0072] The adjusting rack 315 meshes with the adjusting gear 322 on the rotating tube 321. When the adjusting rack 315 moves up and down, it drives the rotating tube 321 to rotate. The rotation of the rotating tube 321 drives the stirring plate 323 to rotate. The change in the position of the stirring plate 323 changes the fluidity of the molten steel and slag in the converter 2, enabling the desulfurizer to contact each part of the molten steel faster and improving the stirring efficiency of the stirring plate 323;

[0073] While the rotating tube 309 is rotating, an external nitrogen pump transports nitrogen to the nitrogen supply pipe 332. The nitrogen is sent into the nitrogen delivery pipe 327 through the nitrogen supply pipe 332 and finally discharged from the bottom of the nitrogen delivery pipe 327 into the molten steel. Nitrogen acts as a stirring medium during the smelting process to accelerate the mixing speed of the desulfurizer and the molten steel. When transporting nitrogen, an external circulating water pump is started simultaneously. The external circulating water pump transports cooling water, which quickly enters the interior of the cooling water pipe 329 through the water inlet pipe 333 and is finally discharged through the water outlet pipe 334. The cooling water cools down the nitrogen delivery pipe 327 to prevent the nitrogen delivery pipe 327 from being damaged due to excessive temperature;

[0074] The input end of the electric valve 335 is electrically connected to the output end of the external power supply. The instantaneous on and off of the water outlet pipe 334 is controlled by controlling the electric valve 335 and the external circulating water pump. The electric valve 335 and the external circulating water pump operate synchronously. When the external circulating water pump delivers cooling water, the electric valve 335 is in an open state. When the external circulating water pump stops delivering cooling water, the electric valve 335 is in a closed state. During the cooling water delivery process, the operation of the external circulating water pump and the electric valve 335 is periodically suspended. The external circulating water pump stops delivering cooling water instantly, and the electric valve 335 is instantly closed. The water in the cooling water pipe 329 is partially vaporized to generate water vapor under high temperature. The cooling water takes away a large amount of heat from the cooling water pipe 329 and the nitrogen delivery pipe 327, which has an impact on the cooling water pipe 329. 9 and the nitrogen delivery pipe 327 play a protective role. The water vapor in the cooling water pipe 329 impacts the buffer plug 337 in the buffer cylinder 336, and the buffer plug 337 rises rapidly. The knocking block 338 knocks the vibration rod 339, and the evaporated water vapor is discharged from the steam leakage hole 344. Under the conduction effect of the vibration rod 339, the cooling water pipe 329 vibrates to prevent the scale in the cooling water from remaining inside the cooling water pipe 329 and hindering the subsequent flow of cooling water, thereby extending the service life of the cooling water pipe 329 and the nitrogen delivery pipe 327. At the same time, when the cooling water flows in the cooling water pipe 329, the blocking block 331 blocks the flowing cooling water, making the water present a turbulent state, causing the cooling water pipe 329 to vibrate, so that the scale cannot be easily adsorbed on the cooling water pipe 329 and the nitrogen delivery pipe 327;

[0075] At the same time, the reciprocating rotation of the rotating tube 309 drives the limit wheel 325 connected to one side to reciprocate on the support ring 324. The bottom of the limit wheel 325 is connected to a connecting seat 326. The limit wheel 325 drives the nitrogen delivery pipe 327 and the cooling water pipe 329 to rotate. The cooling water pipe 329 rotates in the converter 2, so that the nitrogen delivered by the nitrogen delivery pipe 327 is fully delivered to various parts of the molten steel, so that the desulfurization slag is fully in contact with the molten steel, thereby improving the desulfurization efficiency.

[0076] After stirring for a period of time, start the moving motor 401 again, the moving motor 401 drives the moving gear 402 to rotate, and the moving rack 404 drives the camera 406 to move to the top of the converter 2, and use the camera 406 to observe the oil scale on the surface of the molten steel inside the converter 2. When the oil scale on the surface of the molten steel in the converter 2 disappears, stop running the drive motor 303 and the external nitrogen pump, start the electric push rod 425, and drive the baffle 426 to move to seal the quantitative tube 412, start the lifting cylinder 301, and the output end of the lifting cylinder 301 rises, so that the rotating tube 309 and the cooling water pipe 329 are separated from the converter 2, and wait for the next furnace of steelmaking and desulfurization.

[0077] Finally, it should be noted that the above are only preferred examples of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for highly efficient desulfurization of slag behind a converter, characterized in that, It includes the following steps: S1. Start the moving motor (401). The moving motor (401) drives the moving gear (402) to rotate. Under the action of gear meshing, the moving rack (404) drives the camera (406) to move towards the top of the opening of the converter (2). Use the camera (406) to observe the skin condition on the surface of the molten steel inside the converter (2) and judge the sulfur content in the molten steel; S2. During desulfurization, start the electric push rod (425). The electric push rod (425) moves the baffle plate (426) out of the metering pipe (412). The desulfurizing agent enters the gap between the crushing hopper (415) and the crushing cone (417) from the storage tank (411). The lumpy desulfurizing agent is crushed by the crushing cone (417) and then falls to the inner bottom of the crushing tank (414). Nitrogen flows rapidly through the air injection pipe (423). Driven by the flowing nitrogen, the powdered desulfurizing agent enters the conveying pipe (413) through the discharge port (422) and is finally sprayed into the molten steel inside the converter (2) through the spraying head (424) to increase the basicity of the slag; S3. Start the driving motor (303). The driving motor (303) drives the rotating shaft (305) to rotate reciprocally. The rotating shaft (305) drives the rotating pipe (309) to rotate reciprocally, and then drives the stirring plate (323) to rotate to stir the molten steel, desulfurizing agent and slag in the converter (2); S4. The rotating shaft (305) drives the reinforcing gear (307) to rotate. Under the action of gear meshing, it drives the turntable (313) to rotate. The rotation of the turntable (313), under the connection action of the connecting rod (314) and the pull rod (318), drives the adjusting rack (315) to move up and down reciprocally. The adjusting rack (315) drives the rotating pipe (321) to rotate. The rotation of the rotating pipe (321) drives the stirring plate (323) to rotate. The change in the position of the stirring plate (323) changes the fluidity of the molten steel and slag in the converter (2); S5. Nitrogen enters the inside of the rotating pipe (309) from the nitrogen supply branch pipe (340), enters the inside of the stirring plate (323) through the air inlet hole (341) on the rotating pipe (321), and is finally discharged through the air jet head (342). Cooperating with the rotating cooling water pipe (329), the stirring operation is completed.

2. The high-efficiency desulfurization method for slag behind a converter according to claim 1, characterized in that A converter (2) is installed on the top of the base (1). A stirring and desulfurizing assembly (3) is arranged on the top of the converter (2). The stirring and desulfurizing assembly (3) includes a lifting cylinder (301); A lifting cylinder (301) is installed on one side of the converter (2). The top output end of the lifting cylinder (301) is installed with a support frame (302). One end of the top of the support frame (302) is installed with a driving motor (303). The rotating output end of the driving motor (303) is connected with a driving gear (304). The other end of the support frame (302) is rotatably installed with a rotating shaft (305). The top of the rotating shaft (305) is connected with a driven gear (306). A chain belt (343) is connected between the driving gear (304) and the driven gear (306); The bottom of the rotating shaft (305) is connected to a reinforcing gear (307). The bottom of the reinforcing gear (307) is connected to a rotating seat (308). The bottom of the rotating seat (308) is connected to a rotating pipe (309). The top of the support frame (302) is rotatably installed with a connecting gear (310). The reinforcing gear (307) meshes with the connecting gear (310). The bottom of the connecting gear (310) is connected to a main bevel gear (311). One side of the rotating seat (308) is rotatably installed with a sub-bevel gear (312). The main bevel gear (311) meshes with the sub-bevel gear (312). The other side of the rotating seat (308) is rotatably installed with a turntable (313). The sub-bevel gear (312) is fixedly connected to the turntable (313). An adjusting rack (315) is slidably installed inside the rotating pipe (309). A sealing plate (316) is installed at the top of one side of the adjusting rack (315). A moving port (317) is opened in the rotating pipe (309) at the position corresponding to the sealing plate (316). A pull rod (318) is installed on one side of the sealing plate (316). The pull rod (318) passes through the moving port (317). A connecting rod (314) is rotatably connected between the turntable (313) and the pull rod (318). Rotating sleeves (320) are evenly installed on both sides of the bottom of the rotating pipe (309). A rotating pipe (321) is rotatably installed between the two rotating sleeves (320) in the same plane. An adjusting gear (322) is installed in the middle of the rotating pipe (321). A stirring plate (323) is installed at the top of the rotating pipe (321). A support ring (324) is installed at the bottom of the support frame (302). A limiting wheel (325) is embedded inside the support ring (324). A connecting seat (326) is rotatably connected to the bottom of the limiting wheel (325). One side of the connecting seat (326) is connected to the top of one side of the rotating pipe (309). A nitrogen delivery pipe (327) is connected to the bottom of the connecting seat (326). A nitrogen supply pipe (332) is installed inside the connecting seat (326). One end of the nitrogen supply pipe (332) passes through the connecting seat (326) and is connected to the top of the nitrogen delivery pipe (327). A cooling water pipe (329) is sleeved outside the nitrogen delivery pipe (327). Partition plates (328) are welded between both sides of the nitrogen delivery pipe (327) and the cooling water pipe (329). A through hole (330) is opened at the bottom of the partition plate (328). Blocking blocks (331) are evenly welded on both sides of the nitrogen delivery pipe (327). A water inlet pipe (333) is connected to one side of the top of the cooling water pipe (329). A water outlet pipe (334) is connected to the other side of the top of the cooling water pipe (329). An electric valve (335) is installed outside the water outlet pipe (334). The top of the water outlet pipe (334) is connected to a buffer cylinder (336). A buffer plug (337) is slidably installed inside the buffer cylinder (336). A knocking block (338) is installed on the top of the buffer plug (337). One side of the top of the cooling water pipe (329) is connected to a vibration rod (339). The top end of the vibration rod (339) penetrates through the top of the buffer cylinder (336). Steam discharge holes (344) are evenly formed around the top of the buffer cylinder (336).

3. The method for highly efficient desulfurization of slag behind a converter according to claim 2, characterized in that, The input end of the drive motor (303) is electrically connected to the output end of an external power supply. The diameter of the moving port (317) is smaller than the longitudinal section diameter of the sealing plate (316). Ball bearings (319) are evenly installed on both sides of the adjusting rack (315). The surfaces of the ball bearings (319) are in contact with both sides inside the rotating pipe (309).

4. The high-efficiency desulfurization method for slag behind the converter according to claim 2, characterized in that, The outside of the rotating pipe (321) is closely attached to the inside of the rotating sleeve (320). The contact surface between the rotating sleeve (320) and the rotating pipe (321) is a smooth curved surface. The center of the support ring (324) coincides with the center line of the rotating shaft (305). The other end of the nitrogen supply pipe (332) is connected to the air outlet end of an external nitrogen pump. The water inlet pipe (333) and the water outlet pipe (334) are connected to the output end of an external circulating water pump. The input end of the electric valve (335) is electrically connected to the output end of an external power supply. The outside of the cooling water pipe (329) is coated with a refractory material.

5. The high-efficiency desulfurization method for slag after converter blowing according to claim 2, characterized in that, A nitrogen supply branch pipe (340) is connected between one side of the top of the rotating pipe (309) and the nitrogen supply pipe (332). Air inlet holes (341) are formed at both ends of the adjusting gear (322) in the middle of the rotating pipe (321). A jet head (342) is installed on one side of the stirring plate (323). The air inlet holes (341) are communicated with the adjacent jet heads (342).

6. The high-efficiency desulfurization method for slag behind a converter according to claim 2, characterized in that, A control feeding assembly (4) is arranged on one side of the support frame (302). The control feeding assembly (4) includes a moving motor (401). A moving motor (401) is installed on the top of the support frame (302). The rotating output end of the moving motor (401) is connected to a moving gear (402). A sliding frame (403) is installed on one side of the support frame (302). A moving rack (404) is slidably installed inside the sliding frame (403). The moving gear (402) meshes with the moving rack (404). Limit bars (405) are welded on both sides of the moving rack (404). The limit bars (405) are embedded in both sides inside the sliding frame (403). A camera (406) is installed at the top end of the limit bars (405). One end of the top of the support frame (302) is provided with a mounting frame (409). The top of the mounting frame (409) is provided with a heat insulation box (410). Inside the heat insulation box (410), a material storage box (411) is installed. One side of the bottom of the material storage box (411) penetrates through the bottom of the heat insulation box (410) and is connected to a metering pipe (412). The bottom of the metering pipe (412) penetrates through the top surface of the mounting frame (409) and is connected to a feeding pipe (413). At the inner bottom of the heat insulation box (410), an electric push rod (425) is installed. A baffle plate (426) is slidably installed on one side of the metering pipe (412). On one side of the rotating pipe (309), a crushing tank (414) is installed. The bottom of the feeding pipe (413) is connected to one side of the top of the crushing tank (414); Inside the crushing tank (414), a crushing hopper (415) is installed. A discharge hole (416) is formed on the outer side of the crushing hopper (415). In the middle of the top of the crushing tank (414), a connecting shaft (418) is rotatably installed. The bottom of the connecting shaft (418) is connected to a crushing cone (417). The crushing cone (417) is embedded inside the crushing hopper (415). The top of the connecting shaft (418) is connected to a driven wheel (419). On the outer side of the rotating shaft (305), a driving wheel (420) is installed. A connecting belt (421) is wrapped between the driven wheel (419) and the driving wheel (420); On one side of the bottom of the crushing tank (414), a discharge port (422) is formed. On the outer side of the discharge port (422), an air spraying pipe (423) is installed. One side of the air spraying pipe (423) is communicated with the discharge port (422). One end of the bottom of the air spraying pipe (423) is connected to an air spraying head (424). The other end of the air spraying pipe (423) is connected to the air outlet end of an external nitrogen pump.

7. The method for highly efficient desulfurization of slag after converter blowing according to claim 6, wherein The input end of the moving motor (401) is electrically connected to the output end of an external power supply. The contact surface between the limiting strip (405) and the sliding frame (403) is a smooth plane. The camera (406) is electrically connected to an external controller; In the middle of the moving rack (404), a wire pipe (407) is installed. An isolation pipe (408) is sleeved on the outer side of the wire pipe (407). The isolation pipe (408) stores coolant inside.

8. The method for highly efficient desulfurization of slag behind a converter according to claim 6, wherein The input end of the electric push rod (425) is electrically connected to the output end of an external power supply. The cross-sectional area of the baffle plate (426) is larger than the cross-sectional area of the metering pipe (412); The bottom surface of the crushing tank (414) is an inclined surface, and the position of the discharge port (422) is the lowest point of the inclined surface.

9. The method for highly efficient desulfurization of slag after converter blowing according to claim 6, characterized in that, The inner surface of the crushing hopper (415) and the outer surface of the crushing cone (417) are both rough surfaces. The longitudinal cross-sectional shapes of the crushing hopper (415) and the crushing cone (417) are inverted isosceles triangles. The distance between the inner surface of the crushing hopper (415) and the outer surface of the crushing cone (417) gradually decreases from top to bottom.

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