Passivated magnesium spray gun for molten iron desulfurization

Abstract

The invention belongs to the technical field of molten iron pretreatment, and particularly discloses a passivated magnesium spray gun for molten iron desulfurization, which comprises a connecting cylinder, a transmission cavity is formed in the connecting cylinder close to the edge of the bottom, a stirring assembly is arranged in the transmission cavity, and a plurality of reciprocating cavities are formed in the connecting cylinder above the transmission cavity. Feeding assemblies are arranged in the multiple reciprocating cavities correspondingly, and an air supply assembly is arranged in the connecting cylinder. Through the stirring assembly, the feeding assembly and the gas supply assembly, molten iron can be stirred in the desulfurization process of the molten iron recycled in the molten iron furnace, meanwhile, purified magnesium is injected into the molten iron furnace in batches to react with the molten iron, gas is injected into the molten iron furnace, and the injected purified magnesium is sprayed out from the bottom of a magnesium spraying pipe to be mixed with the molten iron; and the purified magnesium is injected in batches, so that the desulfurization reaction of the molten iron is more comprehensive.

Description

Technical Field

[0001] The present invention relates to the technical field of hot metal pretreatment, and particularly relates to a passivated magnesium spray gun for hot metal desulfurization. Background Art

[0002] Hot metal pretreatment refers to a hot metal treatment process in which impurity elements are removed or valuable elements are recovered before the hot metal is poured into a steelmaking furnace. Many steel plants have adopted hot metal pre-desulfurization treatment, and even hot metal three-removal treatment, vanadium extraction, niobium extraction, tungsten extraction, etc., especially for converter steelmaking workshops producing ultra-low sulfur and ultra-low phosphorus steel grades.

[0003] Currently, when using a passivated magnesium spray gun to desulfurize the recycled hot metal, it is necessary to place the passivated magnesium spray gun inside the hot metal furnace to stir the hot metal, so that the hot metal and passivated magnesium are evenly mixed, making the chemical reaction more complete. However, when injecting passivated magnesium, it is mostly concentrated injection. At this time, there is too much passivated magnesium, which will cause the reaction to be rapid. And a part of the sulfur-containing hot metal at the edge of the hot metal furnace that does not react in time cannot be well digested by subsequent reactions, resulting in a decline in the desulfurization effect. Summary of the Invention

[0004] The present invention aims to solve the problems existing in the prior art and provides a passivated magnesium spray gun for hot metal desulfurization.

[0005] To achieve the above object, the present invention adopts the following technical solution: A passivated magnesium spray gun for hot metal desulfurization, including a connection cylinder. A transmission cavity is provided near the bottom edge inside the connection cylinder. A stirring component is arranged inside the transmission cavity. A plurality of reciprocating cavities are provided above the transmission cavity inside the connection cylinder. Feeding components are arranged inside the plurality of reciprocating cavities. A gas supply component is arranged inside the connection cylinder; A flange ring is fixed near the top edge on the outer surface of the connection cylinder. A rotating shaft is rotatably arranged on the inner bottom surface of the connection cylinder. A plurality of flat plates are fixedly arranged at equal intervals along the circumferential direction near the top edge on the outer surface of the rotating shaft. The plurality of flat plates are all correspondingly located inside the connection cylinder. The bottom of the rotating shaft slides through to the inside of the transmission cavity.

[0006] Preferably, the stirring component includes a high-temperature magnesium spraying pipe. The top of the high-temperature magnesium spraying pipe is located inside the transmission cavity and is hermetically attached to the inner top surface of the transmission cavity. The inside of the high-temperature magnesium spraying pipe is hollow and penetrates through. A gear ring is fixed near the top edge on the outer surface of the high-temperature magnesium spraying pipe.

[0007] Preferably, a guide ring is fixed on the inner bottom surface of the transmission cavity. The guide ring is slidably engaged with the bottom of the gear ring. A motor is fixed near the edge on the inner top surface of the transmission cavity. The output end of the motor is fixed with a driving gear. The driving gear is meshed with the gear ring. Support rods are fixed near the top edge on both inner walls of the high-temperature magnesium spraying pipe. One ends of the two support rods are correspondingly fixed to the bottom of the rotating shaft.

[0008] Preferably, the feeding assembly includes a feeding pipe disposed inside the reciprocating cavity. The top of the high-temperature resistant magnesium spraying pipe is provided inside an annular channel. The top of the feeding pipe slides through to the inside of the connecting cylinder, and the bottom of the feeding pipe slides through to the inside of the annular channel. An outlet is provided on the inner bottom surface of the annular channel, and the bottom of the outlet penetrates to the inner wall of the feeding pipe. A backing plate is fixed on the inner bottom surface of the annular channel, and the outlet is located on one side of the backing plate. A dial plate is fixed near one side edge of the bottom of the feeding pipe, and both outer surfaces of the dial plate are slidably fitted to the inner walls on both sides of the annular channel, and the bottom of the dial plate is slidably fitted to the top of the backing plate.

[0009] Preferably, a protective sleeve is fixed on the inner bottom surface of the connecting cylinder. Openings are provided at the bottom edges near the inner walls on both sides of the protective sleeve. The top of the feeding pipe is slidably connected between the inner walls of the protective sleeve. The top of the feeding pipe is closed. Feed inlets are provided at the top edges near the inner walls on both sides of the feeding pipe, and both feed inlets are correspondingly opposite to the openings.

[0010] Preferably, first side ports penetrating to the outside are provided on the inner walls on both sides of the feeding pipe. A conduit is slidably disposed between the inner walls of the feeding pipe. A fixing ring is fixed between the inner walls of the reciprocating cavity, and the feeding pipe is slidably connected between the inner walls of the fixing ring. First connecting plates are fixedly provided inside both first side ports, and one end of each of the two first connecting plates is fixed on the outer surface of the conduit. The bottom of the feeding pipe is closed, and a plurality of leakage ports penetrating to the outside are equidistantly provided on the inner bottom surface of the feeding pipe.

[0011] Preferably, second side ports are provided on the inner bottom surfaces of both first side ports. One side of each of the two second side ports slidably penetrates to the inside of the feeding pipe. A fixing disk is provided at the bottom of the feeding pipe. A plurality of plug blocks extending into the leakage ports are fixed on the top of the fixing disk. Second connecting plates are slidably disposed inside both second side ports, and one end of each of the two second connecting plates is correspondingly fixed on the outer surface of the fixing disk, and the other end of each of the two second connecting plates is correspondingly fixed on the inner wall of the fixing ring.

[0012] Preferably, first sliding ports are provided between the inner walls of both first side ports near the outer surface of the conduit. The first sliding ports penetrate to the inner side of the first connecting plate. A first sealing plate is slidably disposed between the inner walls of the first sliding ports, and the bottom of the first sealing plate is fixed on the top of the second connecting plate. Second sliding ports are provided between the inner walls on both sides of each second side port near the outer surface edge of the conduit, and second sealing plates are slidably disposed between the inner walls of both second sliding ports, and the tops of both second sealing plates are fixed on the bottom of the second connecting plate.

[0013] Preferably, a conical cavity is formed between the inner walls of the feeding pipe. A plurality of fixing rods are fixed between the inner walls of the conical cavity. A circular plate is fixed between one ends of the plurality of fixing rods. A sealing block is arranged between the inner walls of the conical cavity near the top edge. A jacking spring is fixed between the bottom of the sealing block and the top of the circular plate. A pressing rod is fixed between the top of the sealing block and the bottom of the fixed disk.

[0014] Preferably, the air supply assembly includes an annular ring which is fixed on the outer surface of the feeding pipe and slidably connected between the inner walls of the reciprocating cavity. An annular cavity is formed near the bottom edge inside the annular ring. A plurality of grid openings penetrating to the inside of the annular cavity are formed on the outer surface of the annular ring. An air duct penetrating to the inside of the reciprocating cavity is formed inside the connecting cylinder. One end of the air duct is attached to the outer surface of the annular ring. An air inlet pipe communicated with the air duct is fixed on the outer surface of the connecting cylinder. A bending opening is formed on the inner bottom surface of the transmission cavity. One end of the bending opening penetrates to the inside of the reciprocating cavity and is attached to the outer surface of the annular ring. A reciprocating spring is fixed between the top of the annular ring and the bottom of the fixed ring.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By providing a stirring assembly, a feeding assembly and an air supply assembly, the present invention can stir the molten iron during the desulfurization process of the recycled molten iron in the molten iron furnace, and at the same time inject purified magnesium into the molten iron furnace in batches to react with the molten iron. Meanwhile, gas is sprayed into the molten iron furnace to spray the injected purified magnesium from the bottom of the magnesium injection pipe so as to mix it with the molten iron, preventing it from accumulating at the bottom of the magnesium injection pipe. Injecting purified magnesium in batches can make the desulfurization reaction of the molten iron more comprehensive, avoiding that part of the sulfur-containing molten iron at the edge of the molten iron furnace that fails to react in time cannot be well reacted and digested subsequently, resulting in a decrease in the desulfurization effect; 2. By providing a stirring assembly, the present invention can stir the molten iron in the molten iron furnace to make the molten iron and purified magnesium mix evenly. When the stirring assembly works, the motor is started to drive the driving gear to rotate, thereby driving the gear ring to rotate and driving the high-temperature resistant magnesium injection pipe to rotate. While the high-temperature resistant magnesium injection pipe rotates, the rotating shaft will also be driven to rotate, and then the smoothing plate will be driven to rotate to smooth the purified magnesium inside the connecting cylinder; 3. The present invention is provided with a feeding component, which can intermittently supply purified magnesium into the high-temperature resistant magnesium spraying pipe. When the backing plate rotates to the bottom of the baffle plate, it will push the baffle plate upward to the top of the backing plate, thereby driving the feeding pipe to slide upward. When sliding, the feeding port slides above the opening. At this time, the feeding port and the opening are misaligned relative to each other, and the purified magnesium located inside the connecting cylinder cannot enter the inside of the feeding pipe. Since the feeding pipe slides upward, it will drive the conduit to slide upward together. When sliding, multiple plug blocks all slide out from the inside of multiple leakage ports correspondingly. At this time, the bottom of the conduit is communicated with the inside of the feeding pipe through the leakage port, and the top of the sealing block and the top of the conical cavity are in an open state. The purified magnesium located inside the conduit can flow from the leakage port into the inside of the feeding pipe, pass through the sealing block, and flow into the inside of the annular channel from one side of the baffle plate at the bottom of the feeding pipe, and then be pushed into the inside of the discharge port by the baffle plate. By repeating this cycle, the intermittent transportation of purified magnesium can be completed; 4. The present invention is provided with a gas supply component, which can spray gas from the bottom surface of the high-temperature resistant magnesium spraying pipe, thereby pushing the purified magnesium to the outside of the high-temperature resistant magnesium spraying pipe to be mixed with molten iron, preventing it from accumulating at the bottom of the high-temperature resistant magnesium spraying pipe. When the gas supply component works, when the feeding pipe does not slide upward, one end of the air duct and one end of the bent port will be misaligned relative to the grid openings on the annular ring. At this time, the air duct and the bent port are in a non-conductive state. When the feeding pipe slides upward, it will drive the annular ring to slide upward, so that the grid openings on the outer surface of the annular ring are communicated with the air duct and the bent port. At this time, the high-pressure gas supplied from the inside of the inlet pipe can enter the bent port through the air duct and the grid openings, and finally flow into the inside of the high-temperature resistant magnesium spraying pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the main perspective structural schematic diagram of a passivated magnesium spray gun for hot metal desulfurization proposed by the present invention; Figure 2 is the bottom perspective structural schematic diagram of a passivated magnesium spray gun for hot metal desulfurization proposed by the present invention; Figure 3 is the side cross-sectional perspective structural schematic diagram of a passivated magnesium spray gun for hot metal desulfurization proposed by the present invention; Figure 4 is the other side cross-sectional perspective structural schematic diagram of a passivated magnesium spray gun for hot metal desulfurization proposed by the present invention; Figure 5 is the partial cross-sectional perspective structural schematic diagram of a passivated magnesium spray gun for hot metal desulfurization proposed by the present invention; Figure 6 is the present invention Figure 3 The partial enlarged view at A in; Figure 7 is the present invention Figure 4 The partial enlarged view at B in; Figure 8 is the present invention Figure 5 The partial enlarged view at C in.

[0017] In the figure: 1, connecting cylinder; 2, high-temperature resistant magnesium spraying pipe; 3, flange ring; 4, discharge port; 5, transmission cavity; 6, gear ring; 7, guide ring; 8, motor; 9, driving gear; 10, rotating shaft; 11, screed board; 12, support rod; 13, air duct; 14, air inlet pipe; 15, annular duct; 16, backing plate; 17, reciprocating cavity; 18, fixing ring; 19, feeding pipe; 20, first side port; 21, first connecting plate; 22, second side port; 23, second connecting plate; 24, second sliding port; 25, second sealing plate; 26, bending port; 27, grid port; 28, annular cavity; 29, reciprocating spring; 30, annular ring; 31, conduit; 32, leakage port; 33, plug block; 34, fixing disk; 35, first sealing plate; 36, first sliding port; 37, pressing rod; 38, sealing block; 39, jacking spring; 40, circular plate; 41, fixing rod; 42, conical cavity; 43, protective sleeve; 44, opening; 45, feeding port; 46, dialing plate. Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] Please refer to Figures 1-8 , the present invention provides a technical solution: a passivation magnesium spray gun for hot metal desulfurization, including a connecting cylinder 1. A transmission cavity 5 is opened near the bottom edge inside the connecting cylinder 1. A stirring assembly is arranged inside the transmission cavity 5. A plurality of reciprocating cavities 17 are opened above the transmission cavity 5 inside the connecting cylinder 1. Feeding assemblies are arranged inside the plurality of reciprocating cavities 17. An air supply assembly is arranged inside the connecting cylinder 1; A flange ring 3 is fixed near the top edge on the outer surface of the connecting cylinder 1. A rotating shaft 10 is rotatably arranged on the inner bottom surface of the connecting cylinder 1. A plurality of screed boards 11 are equidistantly fixed along the circumferential direction near the top edge on the outer surface of the rotating shaft 10. The plurality of screed boards 11 are all correspondingly located inside the connecting cylinder 1. The bottom of the rotating shaft 10 slides through to the inside of the transmission cavity 5.

[0020] The achieved effect is that by providing a stirring component, a feeding component, and a gas supply component, the molten iron in the internal of the hot metal furnace can be stirred during the desulfurization process of the recycled molten iron, while the purified magnesium is injected into the internal of the hot metal furnace in batches to react with the molten iron. At the same time, gas is sprayed into the hot metal furnace to eject the injected purified magnesium from the bottom of the magnesium injection pipe so that it can be mixed with the molten iron, preventing it from accumulating at the bottom of the magnesium injection pipe. Injecting the purified magnesium in batches can make the desulfurization reaction of the molten iron more comprehensive, avoiding the situation that some sulfur-containing molten iron located at the edge of the hot metal furnace fails to be well reacted and digested subsequently, resulting in a decline in the desulfurization effect.

[0021] As Figure 1 , Figure 3 and Figure 4 shown, the stirring component includes a high-temperature resistant magnesium injection pipe 2. The top of the high-temperature resistant magnesium injection pipe 2 is located inside the transmission cavity 5 and is hermetically fitted with the inner top surface of the transmission cavity 5. The inside of the high-temperature resistant magnesium injection pipe 2 is hollow and through. A gear ring 6 is fixed on the outer surface of the high-temperature resistant magnesium injection pipe 2 near the top edge. A guide ring 7 is fixed on the inner bottom surface of the transmission cavity 5. The guide ring 7 is slidably engaged with the bottom of the gear ring 6. A motor 8 is fixed on the inner top surface of the transmission cavity 5 near the edge. The output end of the motor 8 is fixed with a driving gear 9. The driving gear 9 meshes with the gear ring 6. Support rods 12 are fixed on both inner walls of the high-temperature resistant magnesium injection pipe 2 near the top edge. One end of each of the two support rods 12 is correspondingly fixed to the bottom of a rotating shaft 10.

[0022] The achieved effect is that by starting the motor 8 to drive the driving gear 9 to rotate, thereby driving the gear ring 6 to rotate and driving the high-temperature resistant magnesium injection pipe 2 to rotate. While the high-temperature resistant magnesium injection pipe 2 is rotating, it will also drive the rotating shaft 10 to rotate, and then drive the ironing plate 11 to rotate to level the purified magnesium in the connection cylinder 1.

[0023] As Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, the feeding assembly includes a feeding pipe 19, which is arranged inside the reciprocating cavity 17, and the top of the high-temperature resistant magnesium spraying tube 2 is provided with an inner ring channel 15, and the top of the feeding pipe 19 slides through the inside of the connecting tube 1, and the bottom of the feeding pipe 19 slides through the inside of the ring channel 15. A discharge port 4 is provided on the inner bottom surface of the ring channel 15, and the bottom of the discharge port 4 penetrates the inner wall of the feeding pipe 19, and a pad 16 is fixed on the inner bottom surface of the ring channel 15. The discharge port 4 is located on one side of the pad 16, and a dial plate 46 is fixed to the bottom of the feeding pipe 19 near one side edge. The outer surfaces of both sides of the dial plate 46 are correspondingly slidably fitted on the inner walls of the ring channel 15 on both sides, and the bottom of the dial plate 46 slides and fits with the top of the pad 16, and the interior of the connecting tube 1 A protective sleeve 43 is fixed to the bottom surface, and openings 44 are provided on the inner walls of both sides of the protective sleeve 43 near the bottom edge. The top of the feed pipe 19 is slidably connected between the inner walls of the protective sleeve 43, and the top of the feed pipe 19 is closed. Feed ports 45 are provided on the inner walls of both sides of the feed pipe 19 near the top edge. The two feed ports 45 are opposite to the openings 44. First side ports 20 that pass through to the outside are provided on the inner walls of the feed pipe 19. A conduit 31 is slidably provided between the inner walls of the feed pipe 19. A fixing ring 18 is fixed between the inner walls of the reciprocating cavity 17. The feed pipe 19 is slidably connected between the inner walls of the fixing ring 18. First connecting plates 21 are fixedly provided inside the two first side ports 20, and one end of the two first connecting plates 21 is fixed to the conduit 31. On the outer surface, the bottom of the feed pipe 19 is closed, and a plurality of leakage openings 32 that penetrate to the outside are equidistantly opened on the inner bottom surface of the feed pipe 19. The inner bottom surfaces of the two first side openings 20 are each provided with a second side opening 22, and one side of the two second side openings 22 is correspondingly slid through to the interior of the feed pipe 19. A fixed disk 34 is provided at the bottom of the feed pipe 19, and a plurality of plugs 33 extending to the interior of the leakage opening 32 are fixed on the top of the fixed disk 34. A second connecting plate 23 is slidably provided inside the two second side openings 22, and one end of the two second connecting plates 23 is correspondingly fixed to the outer surface of the fixed disk 34, and the other end of the two second connecting plates 23 is correspondingly fixed to the inner wall of the fixing ring 18. A second connecting plate 23 is provided between the inner walls of the two first side openings 20 near the outer surface of the conduit 31. There is a first sliding opening 36, which passes through the inner side of the first connecting plate 21. A first sealing plate 35 is slidably provided between the inner walls of the first sliding opening 36. The bottom of the first sealing plate 35 is fixed to the top of the second connecting plate 23. A second sliding opening 24 is provided between the inner walls of both sides of the second side opening 22 near the outer surface edge of the conduit 31. A second sealing plate 25 is slidably provided between the inner walls of the two second sliding openings 24. The tops of the two second sealing plates 25 are fixed to the bottom of the second connecting plate 23. A tapered cavity 42 is provided between the inner walls of the feeding tube 19. A plurality of fixing rods 41 are fixed between the inner walls of the tapered cavity 42. A circular plate 40 is fixed between one end of the plurality of fixing rods 41. A sealing block 38 is provided between the inner walls of the tapered cavity 42 near the top edge.A jacking spring 39 is fixed between the bottom of the sealing block 38 and the top of the circular plate 40, and a pressure rod 37 is fixed between the top of the sealing block 38 and the bottom of the fixed plate 34.

[0024] The achieved effect is that since the high-temperature magnesium spraying pipe 2 drives the backing plate 16 to rotate when rotating, when the backing plate 16 does not rotate to the bottom of the dial 46, at this time, the opening 44 on the feeding pipe 19 is opposite to the feeding port 45, and the purified magnesium located inside the connection cylinder 1 flows into the inside of the feeding pipe 19 for storage from the opening 44 and the feeding port 45. And at this time, the plug 33 slides and blocks between the inner walls of the leakage port 32, so the bottom of the conduit 31 is in a cut-off state. At this time, a sealed state is formed between the top of the sealing block 38 and the top of the conical cavity 42. When the backing plate 16 rotates to the bottom of the dial 46, the dial 46 will be pushed upward to the top of the backing plate 16, thereby driving the feeding pipe 19 to slide upward. When sliding, the feeding port 45 slides above the opening 44. At this time, the feeding port 45 and the opening 44 are misaligned and opposite, and the purified magnesium located inside the connection cylinder 1 cannot enter the inside of the feeding pipe 19. Since the feeding pipe 19 slides upward, it will drive the conduit 31 to slide upward together. When sliding, multiple plugs 33 respectively slide out from the inside of multiple leakage ports 32. At this time, the bottom of the conduit 31 is communicated with the inside of the feeding pipe 19 through the leakage port 32 and an open state is formed between the top of the sealing block 38 and the top of the conical cavity 42. The purified magnesium located inside the conduit 31 can flow from the leakage port 32 to the inside of the feeding pipe 19, pass through the sealing block 38 and flow into the inside of the annular channel 15 from one side of the dial 46 at the bottom of the feeding pipe 19, and then be pushed into the inside of the discharge port 4 by the dial 46. By reciprocating in this cycle, the intermittent conveying of the purified magnesium can be completed.

[0025] As Figure 3 and Figure 6 shown, the air supply assembly includes an annular ring 30. The annular ring 30 is fixed on the outer surface of the feeding pipe 19 and is slidably connected between the inner walls of the reciprocating cavity 17. An annular cavity 28 is opened near the bottom edge inside the annular ring 30. A plurality of grid openings 27 penetrating to the inside of the annular cavity 28 are opened on the outer surface of the annular ring 30. An air duct 13 penetrating to the inside of the reciprocating cavity 17 is opened inside the connection cylinder 1. One end of the air duct 13 is attached to the outer surface of the annular ring 30. An air inlet pipe 14 communicated with the air duct 13 is fixed on the outer surface of the connection cylinder 1. A bending opening 26 is opened on the inner bottom surface of the transmission cavity 5. One end of the bending opening 26 penetrates to the inside of the reciprocating cavity 17 and is attached to the outer surface of the annular ring 30. A reciprocating spring 29 is fixed between the top of the annular ring 30 and the bottom of the fixed ring 18.

[0026] The achieved effect is that when the feeding pipe 19 does not slide upward, one end of the air duct 13 and one end of the bending port 26 are misaligned with the grid port 27 on the annular ring 30. At this time, the air duct 13 and the bending port 26 are in a non-conducting state. When the feeding pipe 19 slides upward, it will drive the annular ring 30 to slide upward, making the grid port 27 on the outer surface of the annular ring 30 communicate with the air duct 13 and the bending port 26. At this time, the high-pressure gas supplied from the inside of the intake pipe 14 can enter the bending port 26 through the air duct 13 and the grid port 27, and finally flow into the high-temperature resistant magnesium spraying pipe 2.

[0027] Working principle: When using this device, starting the motor 8 drives the driving gear 9 to rotate, thereby driving the gear ring 6 to rotate and driving the high-temperature resistant magnesium spraying pipe 2 to rotate, which can stir the molten iron inside the molten iron furnace to make the molten iron and purified magnesium mix evenly. While the high-temperature resistant magnesium spraying pipe 2 rotates, it will also drive the rotating shaft 10 to rotate, and then drive the ironing plate 11 to rotate to level the purified magnesium inside the connecting cylinder 1. Since the high-temperature resistant magnesium spraying pipe 2 drives the backing plate 16 to rotate when it rotates, when the backing plate 16 does not rotate to the bottom of the dial plate 46, at this time, the opening 44 on the feeding pipe 19 is opposite to the feeding port 45, and the purified magnesium located inside the connecting cylinder 1 flows into the inside of the feeding pipe 19 from the opening 44 and the feeding port 45 for storage. And at this time, the plug 33 slides and blocks between the inner walls of the leakage port 32, so the bottom of the conduit 31 is in a cut-off state. At this time, the top of the sealing block 38 and the top of the conical cavity 42 are in a sealed state. When the backing plate 16 rotates to the bottom of the dial plate 46, it will push the dial plate 46 upward to the top of the backing plate 16, thereby driving the feeding pipe 19 to slide upward. When sliding, the feeding port 45 slides above the opening 44. At this time, the feeding port 45 and the opening 44 are misaligned and opposite, and the purified magnesium located inside the connecting cylinder 1 cannot enter the inside of the feeding pipe 19. Since the feeding pipe 19 slides upward, it will drive the conduit 31 to slide upward together. When sliding, multiple plugs 33 all slide out from the inside of multiple leakage ports 32 correspondingly. At this time, the bottom of the conduit 31 is in communication with the inside of the feeding pipe 19 through the leakage ports 32, and the top of the sealing block 38 and the top of the conical cavity 42 are in an open state. The purified magnesium located inside the conduit 31 can flow from the leakage ports 32 to the inside of the feeding pipe 19, pass through the sealing block 38 and flow into the inside of the annular channel 15 from one side of the dial plate 46 at the bottom of the feeding pipe 19, and then be pushed into the inside of the discharge port 4 by the dial plate 46. By repeating this cycle, the intermittent conveying of the purified magnesium can be completed. When the feeding pipe 19 does not slide upward, one end of the air duct 13 and one end of the bending port 26 are misaligned with the grid port 27 on the annular ring 30. At this time, the air duct 13 and the bending port 26 are in a non-conducting state. When the feeding pipe 19 slides upward, it will drive the annular ring 30 to slide upward, making the grid port 27 on the outer surface of the annular ring 30 communicate with the air duct 13 and the bending port 26. At this time, the high-pressure gas supplied from the inside of the intake pipe 14 can enter the bending port 26 through the air duct 13 and the grid port 27, and finally flow into the high-temperature resistant magnesium spraying pipe 2.

[0028] 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 passivated magnesium lance for hot metal desulfurization, characterized in that, It includes a connecting cylinder (1). A transmission cavity (5) is provided inside the connecting cylinder (1) near the bottom edge. A stirring component is arranged inside the transmission cavity (5). A plurality of reciprocating cavities (17) are provided above the transmission cavity (5) inside the connecting cylinder (1). Feeding components are arranged inside the plurality of reciprocating cavities (17). An air supply component is arranged inside the connecting cylinder (1). A flange ring (3) is fixed on the outer surface of the connecting cylinder (1) near the top edge. A rotating shaft (10) is rotatably arranged on the inner bottom surface of the connecting cylinder (1). A plurality of smoothing plates (11) are equidistantly fixed on the outer surface of the rotating shaft (10) near the top edge along the circumferential direction. The plurality of smoothing plates (11) are all correspondingly located inside the connecting cylinder (1). The bottom of the rotating shaft (10) slides through to the inside of the transmission cavity (5).

2. The passivated magnesium lance for hot metal desulfurization according to claim 1, wherein: The stirring component includes a high-temperature resistant magnesium spraying pipe (2). The top of the high-temperature resistant magnesium spraying pipe (2) is located inside the transmission cavity (5) and is hermetically and fittingly attached to the inner top surface of the transmission cavity (5). The inside of the high-temperature resistant magnesium spraying pipe (2) is hollow and penetrates through. A gear ring (6) is fixed on the outer surface of the high-temperature resistant magnesium spraying pipe (2) near the top edge.

3. The passivated magnesium lance for hot metal desulfurization according to claim 2, characterized in that: A guide ring (7) is fixed on the inner bottom surface of the transmission cavity (5). The guide ring (7) is slidably engaged with the bottom of the gear ring (6). A motor (8) is fixed on the inner top surface of the transmission cavity (5) near the edge. The output end of the motor (8) is fixed with a driving gear (9). The driving gear (9) is meshed with the gear ring (6). Support rods (12) are fixed on both inner walls of the high-temperature resistant magnesium spraying pipe (2) near the top edge. One ends of the two support rods (12) are correspondingly fixed to the bottom of the rotating shaft (10).

4. A passivated magnesium lance for hot metal desulfurization according to claim 3, characterized in that: The feeding component includes a feeding pipe (19). The feeding pipe (19) is arranged inside the reciprocating cavity (17). The top of the high-temperature resistant magnesium spraying pipe (2) is provided with an annular channel (15) inside. The top of the feeding pipe (19) slides through to the inside of the connecting cylinder (1). The bottom of the feeding pipe (19) slides through to the inside of the annular channel (15). A discharge port (4) is provided on the inner bottom surface of the annular channel (15). The bottom of the discharge port (4) penetrates through to the inner wall of the feeding pipe (19). A cushion plate (16) is fixed on the inner bottom surface of the annular channel (15). The discharge port (4) is located on one side of the cushion plate (16). A baffle plate (46) is fixed on the bottom of the feeding pipe (19) near one side edge. Both outer surfaces of the baffle plate (46) are correspondingly slidably attached to both inner walls of the annular channel (15). The bottom of the baffle plate (46) is slidably attached to the top of the cushion plate (16).

5. A passivated magnesium lance for hot metal desulfurization according to claim 4, characterized in that: A protective sleeve (43) is fixed to the inner bottom surface of the connecting cylinder (1). Openings (44) are formed in the inner walls on both sides of the protective sleeve (43) near the bottom edges. The top of the feeding pipe (19) is slidably connected between the inner walls of the protective sleeve (43). The top of the feeding pipe (19) is closed. Feeding ports (45) are formed in the inner walls on both sides of the feeding pipe (19) near the top edges. The two feeding ports (45) are respectively opposite to the openings (44).

6. The passivated magnesium lance for hot metal desulfurization according to claim 5, wherein: First side ports (20) penetrating to the outside are formed in the inner walls on both sides of the feeding pipe (19). A conduit (31) is slidably arranged between the inner walls of the feeding pipe (19). A fixing ring (18) is fixed between the inner walls of the reciprocating cavity (17). The feeding pipe (19) is slidably connected between the inner walls of the fixing ring (18). First connecting plates (21) are fixedly arranged inside the two first side ports (20). One ends of the two first connecting plates (21) are fixed to the outer surface of the conduit (31). The bottom of the feeding pipe (19) is closed. A plurality of leakage ports (32) penetrating to the outside are equidistantly formed in the inner bottom surface of the feeding pipe (19).

7. A passivated magnesium spray gun for hot metal desulfurization according to claim 6, characterized in that: Second side ports (22) are formed in the inner bottom surfaces of the two first side ports (20). One sides of the two second side ports (22) respectively slide through to the inside of the feeding pipe (19). A fixing disk (34) is arranged at the bottom of the feeding pipe (19). A plurality of plug blocks (33) extending into the leakage ports (32) are fixed to the top of the fixing disk (34). Second connecting plates (23) are slidably arranged inside the two second side ports (22). One ends of the two second connecting plates (23) are respectively fixed to the outer surface of the fixing disk (34). The other ends of the two second connecting plates (23) are respectively fixed to the inner walls of the fixing ring (18).

8. A passivated magnesium lance for hot metal desulfurization according to claim 7, characterized in that: First sliding ports (36) are formed between the inner walls of the two first side ports (20) near the outer surface of the conduit (31). The first sliding ports (36) penetrate to the inner side of the first connecting plates (21). A first sealing plate (35) is slidably arranged between the inner walls of the first sliding ports (36). The bottom of the first sealing plate (35) is fixed to the top of the second connecting plate (23). Second sliding ports (24) are formed between the inner walls on both sides of the second side port (22) near the outer surface edge of the conduit (31). Second sealing plates (25) are slidably arranged between the inner walls of the two second sliding ports (24). The tops of the two second sealing plates (25) are fixed to the bottom of the second connecting plate (23).

9. The passivated magnesium lance for hot metal desulfurization according to claim 8, characterized in that: A conical cavity (42) is formed between the inner walls of the feeding pipe (19). A plurality of fixing rods (41) are fixed between the inner walls of the conical cavity (42). A circular plate (40) is fixed between one ends of the plurality of fixing rods (41). A sealing block (38) is arranged between the inner walls of the conical cavity (42) near the top edge. A jacking spring (39) is fixed between the bottom of the sealing block (38) and the top of the circular plate (40). A pressing rod (37) is fixed between the top of the sealing block (38) and the bottom of the fixed disk (34).

10. A passivated magnesium spray gun for hot metal desulfurization according to claim 9, characterized in that: The air supply assembly includes an annular ring (30). The annular ring (30) is fixed on the outer surface of the feeding pipe (19) and is slidably connected between the inner walls of the reciprocating cavity (17). An annular cavity (28) is formed near the bottom edge inside the annular ring (30). A plurality of grid openings (27) penetrating to the inside of the annular cavity (28) are formed on the outer surface of the annular ring (30). An air passage (13) penetrating to the inside of the reciprocating cavity (17) is formed inside the connecting cylinder (1). One end of the air passage (13) is attached to the outer surface of the annular ring (30). An air inlet pipe (14) communicated with the air passage (13) is fixed on the outer surface of the connecting cylinder (1). A bending opening (26) is formed on the inner bottom surface of the transmission cavity (5). One end of the bending opening (26) penetrates to the inside of the reciprocating cavity (17) and is attached to the outer surface of the annular ring (30). A reciprocating spring (29) is fixed between the top of the annular ring (30) and the bottom of the fixed ring (18).

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