Blowing desulfurization device for rocking furnace and rocking furnace

Abstract

This utility model discloses a spray desulfurization device and a shaking furnace for use in a shaking furnace. The desulfurization device includes a spray gun and a mixing hopper. The spray gun is connected to the mixing hopper through a spray pipe. The spray gun includes a spray section and a connecting section. The top end of the spray section is connected to the bottom end of the connecting section, and a nozzle is connected to the bottom end of the spray section. A rack is provided on the connecting section, and a drive gear is meshed on the rack. The drive gear is connected to a first drive motor. An annular gas distribution pipe is provided inside the mixing hopper, and a gasification pipe is provided on the annular gas distribution pipe. The annular gas distribution pipe is connected to an external gas source through a gas supply pipe. A feed pipe is provided on the mixing hopper. In this utility model, after the desulfurizing agent is put into the mixing hopper, the carrier gas is sprayed out from the gasification pipe, so that the desulfurizing agent is fluidized for spraying and feeding, improving the uniformity of feeding. During feeding, the rack is driven to rise and fall by the first drive motor, so that the desulfurizing agent is sprayed and released at different depths in the shaking furnace, expanding the reaction area and avoiding the desulfurizing agent being concentrated only on the surface of the shaking furnace or at a fixed depth, thereby improving the desulfurization efficiency.

Description

Technical Field

[0001] This utility model relates to the field of ferromanganese alloy smelting technology, specifically to a desulfurization device for a rocking furnace and the rocking furnace itself. Background Technology

[0002] In the iron and steel metallurgy industry, sulfur is generally considered a harmful element, significantly reducing the mechanical properties, weldability, and corrosion resistance of steel. Ferromanganese alloys are an indispensable raw material in the iron and steel metallurgy industry. If the sulfur content of ferromanganese alloys is high, it will be carried into the molten steel during the steelmaking process. Therefore, the desulfurization process of ferromanganese alloy solutions has become an indispensable part of the ferromanganese alloy production process. Currently, for the desulfurization of ferromanganese alloy melts, operators pour powdered calcium-based or magnesium-based desulfurizing agents onto the upper surface of a shaking ladle and then shake it. The desulfurizing agent concentrates on the surface of the shaking ladle, which can easily lead to the desulfurizing agent being encased in the slag or floating on the surface of the molten liquid and burning out. This results in high consumption of desulfurizing agent, and the powdered desulfurizing agent is prone to moisture absorption and clumping. The clumped desulfurizing agent has a significantly reduced specific surface area, affecting the desulfurization efficiency. Summary of the Invention

[0003] The main purpose of this utility model is to overcome the defects of the above-mentioned background technology and provide a desulfurization device for a rocking furnace and a rocking furnace.

[0004] To achieve the above objectives, this utility model proposes a spray desulfurization device for a shaking furnace, comprising a spray gun and a mixing hopper. The top of the spray gun is connected to the bottom outlet of the mixing hopper via a spray pipe. The spray gun can be raised and lowered so that its bottom end extends into the shaking furnace. The spray gun includes a spray section and a connecting section. The top of the spray section is connected to the bottom of the connecting section. The bottom of the spray section is connected to a nozzle. The connecting section is provided with a rack, and a drive gear is meshed on the rack. The drive gear is connected to the conveying end of a first drive motor. The mixing hopper is provided with an annular gas distribution pipe, and several gasification pipes are arranged on the annular gas distribution pipe. The annular gas distribution pipe is connected to an external gas source via a gas supply pipe. A feed pipe is opened at the top of the mixing hopper.

[0005] To further optimize the technical solution, the annular gas distribution pipe is horizontally arranged inside the mixing hopper, and a plurality of gasification pipes are circumferentially distributed in the inner ring of the annular gas distribution pipe and are all connected to the annular gas distribution pipe.

[0006] To further optimize the technical solution, the outer walls of the spraying section and the nozzle are covered with a refractory material layer.

[0007] To further optimize the technical solution, a guide plate is provided at the bottom of the spray section.

[0008] This utility model also discloses a rocking furnace, including the above-mentioned injection desulfurization device, rocking bag, rocking frame, eccentric drive shaft and fume hood. A second drive motor is connected to the eccentric drive shaft. The rocking frame is set on the eccentric drive shaft. The rocking bag is set on the rocking frame. The fume hood is set above the rocking bag. The injection desulfurization device corresponds to the rocking bag.

[0009] To further optimize the technical solution, a guide groove is provided on the side wall of the rack, and a first guide block is provided on the smoke collection hood. The first guide block has a first through hole through which the connecting section and the rack slide. The inner wall of the first through hole has a first protrusion corresponding to the guide groove.

[0010] To further optimize the technical solution, the smoke collection hood is in the shape of an inverted funnel. Inside the smoke collection hood, there is a first mounting bracket. The first mounting bracket is provided with a second guide block. The second guide block has a second through hole for the connecting section and the rack to slide through. The inner wall of the second through hole is provided with a second protrusion corresponding to the guide groove.

[0011] To further optimize the technical solution, the first drive motor is installed on the top surface of the smoke collection hood, and the top ends of the connecting section and the rack extend to the top surface of the smoke collection hood and are connected to the blowpipe.

[0012] To further optimize the technical solution, the small opening of the smoke collection hood is connected to an external flue gas purification device via a smoke inlet pipe.

[0013] The technical solution is further optimized in that the smoke inlet pipe is laid out horizontally, the pipe body is fixed on the turntable, the rotating shaft of the turntable is connected to the output end of the third drive motor, the third drive motor is fixedly installed on the second mounting bracket, and the mixing hopper is installed on the turntable.

[0014] The beneficial effects of this utility model include: The desulfurizing agent is fed into the mixing hopper through the feed pipe; high-pressure carrier gas enters the annular gas distribution pipe through the gas supply pipe, and under pressure, it is sprayed into the mixing hopper through each gasification pipe. The desulfurizing agent contacts and mixes with the gas in the mixing hopper, and undergoes uniform fluidization under the agitation of the gas, preventing the powdered desulfurizing agent from bridging, agglomerating, or clumping. During injection, the desulfurizing agent is fluidized, and the injection speed is uniform and stable. The first drive motor drives the drive gear to rotate, causing the injection section of the spray gun to descend and extend into the interior of the furnace. The fluidized desulfurizing agent then enters the injection pipe from the mixing hopper and flows along the continuous... The injection section sprays the desulfurizing agent from the nozzle into the shaking pot, and works in conjunction with the shaking of the pot to desulfurize the ferromanganese alloy solution. During the injection process, the first drive motor drives the drive gear to rotate in both directions, causing the nozzle to continuously rise and fall within the shaking pot. This allows the desulfurizing agent to be sprayed and released at different depths within the pot, which helps to expand the reaction area and prevents the desulfurizing agent from being concentrated only on the surface of the pot or at a fixed depth. This reduces the amount of unused desulfurizing agent that is trapped in the slag, thus reducing the amount of desulfurizing agent consumed. The strong stirring effect generated by the movement of the pot significantly accelerates the mass transfer process of the desulfurization reaction, shortens the desulfurization time, and improves the desulfurization efficiency. Attached Figure Description

[0015] Figure 1 This is an overall schematic diagram of the shaking furnace in an embodiment of this utility model.

[0016] Figure 2 This is a schematic diagram of the spray gun in an embodiment of this utility model.

[0017] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0018] Figure 4 This is a schematic diagram of the connection of the annular air distribution pipe in an embodiment of this utility model.

[0019] Figure 5 This is a schematic diagram of the top view of the smoke collection hood in an embodiment of this utility model.

[0020] Figure 6 This is a schematic diagram of the bottom view of the smoke collection hood in an embodiment of this utility model.

[0021] Reference numerals: 1. Spray gun; 101. Spraying section; 102. Connecting section; 103. Nozzle; 104. Rack; 105. Drive gear; 106. First drive motor; 107. Guide plate; 108. Guide groove; 2. Mixing hopper; 201. Annular gas distribution pipe; 202. Gasification pipe; 203. Gas supply pipe; 204. Feed pipe; 3. Spraying pipe; 4. Shaking furnace; 401. Shaking ladle; 402. Shaking frame; 403. Eccentric transmission shaft; 404. Smoke hood; 405. Second drive motor; 406. First through hole; 407. First protrusion; 408. First mounting bracket; 409. Second guide block; 410. Second through hole; 411. Second protrusion; 412. Smoke duct; 5. Turntable; 6. Third drive motor; 7. Second mounting bracket. Detailed Implementation

[0022] To make the technical problems, technical solutions, and beneficial effects of the embodiments of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to that other component. Furthermore, a connection can be for both fixing and circuit connection purposes.

[0024] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Example 1

[0026] Please see Figures 1 to 4This embodiment discloses a spray desulfurization device for a rocking furnace, including a spray gun 1 and a mixing hopper 2. The top of the spray gun 1 is connected to the bottom outlet of the mixing hopper 2 through a spray pipe 3. The spray gun 1 can be raised and lowered to move so that its bottom end extends into the inner bottom of the rocking furnace 4. The spray gun 1 includes a spray section 101 and a connecting section 102. The top of the spray section 101 is connected to the bottom end of the connecting section 102. A nozzle 103 is connected to the bottom end of the spray section 101. A rack 104 is vertically provided on the outer wall along the length direction. A drive gear 105 is meshed on the rack 104. The drive gear 105 is connected to the conveying end of the first drive motor 106. An annular air distribution pipe 201 is provided inside the mixing hopper 2. Several gasification pipes 202 are arranged on the annular air distribution pipe 201. The annular air distribution pipe 201 is connected to an external air source through an air supply pipe 203. A feed pipe 204 is connected to the top of the mixing hopper 2. Specifically, the spraying section 101 and the connecting section 102 are integrally formed, with interconnected internal channels. The outer walls of the spraying section 101 and the nozzle 103 are covered with a refractory material layer, meaning the outer walls are cast with refractory material linings, such as high-alumina or silicon carbide refractory materials, to resist high-temperature erosion and chemical corrosion of molten iron, ensuring the service life of the spraying section 101 and the nozzle 103. The spraying pipe 3 is a flexible hose with sufficient length to avoid interfering with the raising and lowering of the spray gun 1. The mixing hopper 2 is a conical-bottom structure tank, and the outer diameter of the annular air distribution pipe 201 is smaller than the inner diameter of the mixing hopper 2. In the lower part of the mixing hopper 2, several gasification pipes 202 are evenly distributed circumferentially in the inner ring of the annular gas distribution pipe 201 and are connected to the annular gas distribution pipe 201. The gasification pipes 202 and the annular gas distribution pipe 201 are on the same plane. The gas supply pipe 203 extends from the side wall of the mixing hopper 2 to the outside. The external gas source is nitrogen or argon with a certain pressure. The feed pipe 204 is connected to the external desulfurizing agent storage tank. The desulfurizing agent is a powdered calcium-based, magnesium-based or composite desulfurizing agent. Valves (not shown in the figure) are provided on the blowing pipe 3, the feed pipe 204 and the gas supply pipe 203 to control their opening and closing.

[0027] In this embodiment, during the shaking process in the shaking furnace, the desulfurizing agent is fed into the mixing hopper 2 through the feed pipe 204. High-pressure carrier gas (nitrogen or argon) enters the annular gas distribution pipe 201 through the gas supply pipe 203, and under pressure, is sprayed into the mixing hopper 2 through each gasification pipe 202. The desulfurizing agent contacts and mixes with the gas in the mixing hopper 2, and undergoes uniform fluidization under the agitation of the gas, preventing the powdered desulfurizing agent from bridging or clumping in the mixing hopper 2. Simultaneously, the first drive motor 106... The drive gear 105 rotates, causing the spray section 101 of the spray gun 101 to descend and extend into the interior of the shaking furnace. The fluidized desulfurizing agent is then discharged from the bottom outlet of the mixing hopper 2 into the spray pipe 3. It travels along the connecting section 102 of the spray gun 101 and the spray section 101, exiting from the nozzle 103 into the shaking furnace to cooperate with the shaking of the furnace for desulfurization. During the spraying process, the first drive motor 106 continuously drives the drive gear 105 to rotate in both directions, causing the nozzle 103 to rotate within the shaking furnace. The desulfurizing agent continuously moves up and down within the shaking furnace, being sprayed and released at different depths within the shaking furnace. When the spray volume reaches the set amount, the feed pipe 204 stops feeding, and the air supply pipe 203 continues to supply high-pressure carrier gas to purge the mixing hopper 2, the spray pipe 3, and the spray gun 1 for a period of time. After purging, the first drive motor 106 drives the drive gear 105 to rotate in the opposite direction, causing the spray gun 101 to rise from the shaking furnace, completing the shaking desulfurization. Because the sprayed desulfurizing agent is uniformly fluidized, it will not clump, resulting in a uniform and stable desulfurizing agent spraying and feeding speed. Compared with the method of directly pouring the desulfurizing agent into the shaking furnace, the desulfurizing agent spraying and release position is located at different interface heights within the shaking furnace, which helps to expand the reaction area, avoids the desulfurizing agent being concentrated only on the surface of the shaking furnace or at a fixed depth, reduces the amount of unused desulfurizing agent being wrapped in the slag, and reduces the consumption of desulfurizing agent. Combined with the movement of the shaking furnace, it generates a strong stirring effect, which can significantly accelerate the mass transfer process of the desulfurization reaction, shorten the desulfurization time, and improve the desulfurization efficiency.

[0028] In a preferred embodiment, a guide plate 107 is provided at the bottom of the injection section 101. Specifically, the guide plate 107 is made of refractory material and is installed at an angle to the flow direction and in line with the main direction of the furnace shaking. The guide plate 107 guides the movement path of the fluid particles generated by the furnace shaking, generating local eddies to enhance the mixing effect and further improve the dispersion efficiency and reaction rate of the desulfurizer in the molten iron. Example 2

[0029] Please see Figures 1 to 6The rocking furnace 4 disclosed in this embodiment includes the above-mentioned injection desulfurization device, rocking bag 401, rocking frame 402, eccentric drive shaft 403 and fume hood 404. A second drive motor 405 is connected to the eccentric drive shaft 403. The rocking frame 402 is disposed on the eccentric drive shaft 403. The rocking bag 401 is disposed on the rocking frame 402. The fume hood 404 is disposed above the rocking bag 401. The injection desulfurization device corresponds to the rocking bag 401 below. Specifically, three sets of eccentric drive shafts 403 are provided. Eccentric drive shafts 403 are existing technology products, and their specific structure will not be described in detail here. The rocker arm 402 has an equilateral triangular structure and is supported by the three sets of eccentric drive shafts 403. Under the driving action of the second drive motor 405, the eccentric drive shafts 403 (rocker arm 402) are driven to rotate eccentrically. The smoke hood 404 is suspended directly above the rocker arm 401. The smoke hood 404 is inverted funnel-shaped, and its small opening is connected to a guide tube. The flue pipe 412 is connected to an external flue gas purification device. The external flue gas purification device generates negative pressure to collect and extract the flue gas generated by the shaking kiln through the fume hood 404 for treatment. The spray gun 1 of the injection desulfurization device is vertically installed on the shaking kiln 401. The first drive motor 106 is fixedly installed on the top surface of the shaking kiln 401. The top ends of the connecting section 102 and the rack 104 extend to the top surface of the fume hood 404 and are connected to the injection pipe 3. The spray gun 1 can be raised and lowered based on the fume hood 404 under the drive of the first drive motor 106.

[0030] In a specific example, guide grooves 108 are provided on both sides of the rack 104 along the length of the rack 104. A first guide block 405 is embedded in the smoke hood 404 at the position where the connecting section 102 and the rack 104 pass through. A first through hole 406 is provided on the first guide block 405 for the connecting section 102 and the rack 104 to slide through. A first protrusion 407 corresponding to the guide groove 108 is provided on the inner wall of the first through hole 406. The first protrusion 407 can extend into the guide groove 108 to form a sliding guide pair, which forces the spray gun 1 to move only along the direction of the guide groove 108 (i.e., the vertical direction), effectively preventing the spray gun 1 from twisting due to force, and improving the rigidity and stability of the spray gun 1 during lifting and lowering.

[0031] In a specific example, a first mounting bracket 408 is provided inside the smoke hood 404, and a second guide block 409 is provided on the first mounting bracket 408. A second through hole 410 is provided on the second guide block 409 for the connecting section 102 and the rack 104 to slide through. A second protrusion 411 corresponding to the guide groove 108 is provided on the inner wall of the second through hole 410. The second protrusion 411 can extend into the guide groove 108. The second through hole 410 is vertically aligned with the first through hole 406. The connecting section 102 and the rack 104 pass through the first through hole 406 and the second through hole 410 at the same time. Through the cooperation of the first guide block 405 and the second guide block 409, a double-point guide support is formed, which further improves the stability of the spray gun 1 during lifting and lowering.

[0032] In a preferred embodiment, the smoke inlet pipe 412 is horizontally arranged, and the end of the smoke inlet pipe 412 away from the smoke hood 404 is fixed on the turntable 5. The rotating shaft of the turntable 5 is connected to the output end of the third drive motor 6, which is fixedly mounted on the second mounting bracket 7. The mixing hopper 2 is mounted on the turntable 5. Specifically, the smoke hood 404 and the spray gun 1 are supported by the smoke inlet pipe 412 and extend above the cradle 401. The second mounting bracket 7 is mounted next to the cradle 402. The turntable 5 is driven to rotate by the third drive motor 6, which can synchronously drive the smoke hood 404 and the spray gun 1 to rotate and move horizontally, providing unobstructed space for cranes or other lifting equipment to lift the cradle 401. Before rotation, the spray gun 1 needs to be driven to rise by the first drive motor 106 so that the spray section 101 of the spray gun 1 completely detaches from the interior of the cradle 401 and rises to a safe height.

[0033] The above description, in conjunction with specific / preferred embodiments, provides a further detailed explanation of the present invention and should not be construed as limiting the specific implementation of the present invention to these descriptions. For those skilled in the art, various substitutions or modifications can be made to these described embodiments without departing from the concept of the present invention, and all such substitutions or modifications should be considered within the protection scope of the present invention. In the description of this specification, the reference to terms such as "an embodiment," "some embodiments," "preferred embodiment," "example," "specific example," or "some examples," etc., indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials, or characteristics can be combined in a suitable manner in any one or more embodiments or examples. Without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification and the features of different embodiments or examples. Although embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations may be made herein without departing from the scope of protection of the patent application.

Claims

1. A pulse-jet desulfurization device for a shaking furnace, characterized in that: The device includes a spray gun and a mixing hopper. The top of the spray gun is connected to the bottom outlet of the mixing hopper via a spray pipe. The spray gun can be raised and lowered so that its bottom end extends into the shaking furnace. The spray gun includes a spray section and a connecting section. The top of the spray section is connected to the bottom of the connecting section. The bottom of the spray section is connected to a nozzle. The connecting section is equipped with a rack, and a drive gear is meshed on the rack. The drive gear is connected to the conveying end of a first drive motor. The mixing hopper is equipped with an annular gas distribution pipe, and several gasification pipes are arranged on the annular gas distribution pipe. The annular gas distribution pipe is connected to an external gas source through a gas supply pipe. A feed pipe is opened at the top of the mixing hopper.

2. The injection desulfurization device as described in claim 1, characterized in that: The annular gas distribution pipe is horizontally arranged inside the mixing hopper, and a plurality of gasification pipes are circumferentially distributed in the inner ring of the annular gas distribution pipe and are all connected to the annular gas distribution pipe.

3. The injection desulfurization device as described in claim 2, characterized in that: The outer walls of the spray section and the nozzle are covered with a refractory material layer.

4. The injection desulfurization device as described in claim 3, characterized in that: The bottom of the jet section is equipped with a guide plate.

5. A shaking furnace, characterized in that: The device includes a pulse-jet desulfurization unit as described in any one of claims 1 to 4, a shaking bag, a shaking frame, an eccentric drive shaft, and a smoke hood. A second drive motor is connected to the eccentric drive shaft. The shaking frame is disposed on the eccentric drive shaft. The shaking bag is disposed on the shaking frame. The smoke hood is disposed above the shaking bag. The pulse-jet desulfurization unit corresponds to the shaking bag.

6. The shaking furnace as described in claim 5, characterized in that: The rack has a guide groove on its side wall, and the smoke hood has a first guide block. The first guide block has a first through hole through which the connecting section and the rack slide. The inner wall of the first through hole has a first protrusion corresponding to the guide groove.

7. The shaking furnace as described in claim 6, characterized in that: The smoke collection hood is in the shape of an inverted funnel. Inside the smoke collection hood, there is a first mounting bracket. The first mounting bracket is provided with a second guide block. The second guide block has a second through hole through which the connecting section and the rack slide. The inner wall of the second through hole is provided with a second protrusion corresponding to the guide groove.

8. The shaking furnace as described in claim 7, characterized in that: The first drive motor is mounted on the top surface of the smoke collection hood, and the top ends of the connecting section and the rack extend to the top surface of the smoke collection hood and communicate with the blow pipe.

9. The shaking furnace as described in claim 8, characterized in that: The small opening of the smoke hood is connected to an external flue gas purification device via a smoke inlet pipe.

10. The shaking furnace as described in claim 9, characterized in that: The smoke inlet pipe is laid out horizontally, and the pipe body is fixed on the turntable. The rotating shaft of the turntable is connected to the output end of the third drive motor. The third drive motor is fixedly installed on the second mounting bracket, and the mixing hopper is installed on the turntable.

Images