Deoxidizing and desulfurizing device for LF (ladle furnace) refining of molten steel

Abstract

The utility model discloses a deoxidizing and desulfurizing device for LF (ladle furnace) refining of molten steel, which belongs to the technical field of deoxidizing and desulfurizing of molten steel and comprises a bottom plate, a turning frame is connected to the top of the bottom plate, a furnace body is arranged between the inner walls of the turning frame, a mounting frame is connected to the top of the turning frame, and a hydraulic cylinder is fixedly mounted at the top of the mounting frame. A hydraulic cylinder ejector rod penetrates through the top of the mounting frame and is connected with a connecting frame, a splash-proof cover is connected to the bottom of the connecting frame, a guide device is arranged at the bottom of the splash-proof cover, and the guide device comprises a mounting plate; the motor drives the driving wheel to rotate, so that the driving wheel drives the connecting pipe to rotate through the first gear ring, the connecting pipe drives the gas distributing pipe to rotate through the bottom box at the bottom, the gas distributing pipe drives the spray head to rotate, the spray head guides blown inert gas, and the inert gas is evenly dispersed in molten steel; low mixing efficiency caused by concentration of inert gases is avoided, so that the deoxidation and desulfurization efficiency is ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of molten steel deoxidization and desulphurization, especially relates to a deoxidization and desulphurization device for molten steel LF refining. BACKGROUND

[0002] High oxygen content in molten steel can cause a series of problems, including subcutaneous bubble, loose and other defects, which can reduce the plasticity and impact toughness and other mechanical properties of steel, and the existence of sulfur in steel can affect the toughness, ductility and corrosion resistance and other properties of steel, and too high sulfur content can cause hot brittleness of steel during hot working, affecting the processing performance and service life, therefore, the molten steel needs to be deoxidized and desulfurized before solidification.

[0003] However, in actual use, the traditional molten steel is deoxidized and desulfurized by using a spray gun to mix the desulfurizer with inert gas and then blowing it into the molten iron or molten steel, so as to realize deoxidization and desulfurization by fully mixing the molten iron with the desulfurizer. However, the direction of blowing inert gas into the traditional molten steel is fixed, so that the inert gas blown in will float along the same path, resulting in low mixing rate of inert gas in the molten steel, thereby reducing the deoxidization and desulfurization efficiency. UTILITY MODEL CONTENT

[0004] The utility model aims at: in order to solve the problem of low mixing efficiency caused by fixed direction of inert gas blowing in traditional deoxidization and desulfurization, and put forward a kind of deoxidization and desulfurization device for molten steel LF refining.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: a kind of deoxidization and desulfurization device for molten steel LF refining, including bottom plate, the bottom plate top is connected with turnover frame, the turnover frame inner wall is equipped with furnace body, the turnover frame top is connected with mounting bracket, the hydraulic cylinder is fixedly installed on the mounting bracket top, the hydraulic cylinder top rod penetrates the mounting bracket top and is connected with connecting frame, the connecting frame bottom is connected with splash guard, the splash guard bottom is equipped with guide device, the guide device includes mounting plate, the mounting plate one side is fixedly installed with motor, the motor output shaft is connected with driving wheel, the driving wheel outer wall is engaged with first tooth ring, the first tooth ring inner wall is connected with connecting pipe, the connecting pipe inner wall is rotatably connected with external pipe, the connecting pipe bottom is connected with bottom box, the bottom box outer wall is connected with two gas distribution pipes, the gas distribution pipe outer wall is connected with a plurality of spray heads.

[0006] Further description of the above technical scheme:

[0007] The splash guard top is embedded with bearing, and the bearing is rotatably connected with the connecting pipe outer wall, and the mounting plate bottom is connected with the splash guard top.

[0008] Further description of the above technical scheme:

[0009] The inner wall of the connecting pipe is provided with a rotating groove, and the outer wall of the external connecting pipe is connected with a rotating ring, and the outer wall of the rotating ring is attached to the inner wall of the rotating groove and is connected in sliding mode.

[0010] As a further description of the above technical solution:

[0011] The end of the external connecting pipe, which is away from the first tooth ring, is a soft pipe, and the end of the external connecting pipe, which is attached to the inner wall of the connecting pipe, is a rigid pipe.

[0012] As a further description of the above technical solution:

[0013] The outer wall of the connecting pipe is connected with an agitating device, the agitating device comprises a rotating plate, the two sides of the rotating plate are embedded with another bearing, the inner wall of the other bearing is connected with a rotating shaft in rotating mode, the top of the rotating shaft is connected with a gear, the bottom of the rotating shaft is connected with a rotating rod, and the outer walls of the two gears are engaged with the same second tooth ring.

[0014] As a further description of the above technical solution:

[0015] The inner wall of the rotating plate is provided with a through groove, and the inner wall of the through groove is connected with the outer wall of the rotating plate.

[0016] As a further description of the above technical solution:

[0017] The top of the second tooth ring is connected with the bottom of the splash-proof cover, and the outer wall of the rotating rod is connected with a plurality of agitating rods.

[0018] As described above, due to the adoption of the above technical solution, the beneficial effects of the present application are:

[0019] 1. In the present application, the guide device is provided, the driving wheel is driven to rotate by the motor, the connecting pipe is driven to rotate by the first tooth ring, the gas distribution pipe is driven to rotate by the bottom box at the bottom of the connecting pipe, the nozzle is driven to rotate by the gas distribution pipe, the inert gas blown by the nozzle is guided, the inert gas is uniformly dispersed in the molten steel, the inert gas is prevented from being concentrated together to cause low mixing efficiency, and the deoxidization and desulfurization efficiency is ensured.

[0020] 2. In the present application, the agitating device is provided, the rotating plate is driven to rotate by the connecting pipe, the rotating rod is driven to rotate by the rotating plate, the agitating rod is driven to agitate in a large range by the rotating rod, the gear is driven to move in the second tooth ring by the rotating plate at the same time, the second tooth ring is driven to rotate by the gear, the rotating rod is driven to rotate by the gear, the agitating rod is driven to rotate in a small range around the rotating rod, the uniformity of the inert gas mixed in the molten steel is improved, and the deoxidization and desulfurization efficiency is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1A kind of three-dimensional structure schematic diagram of the deoxidizing and desulfurizing device for steel LF refining is provided for the utility model;

[0022] Figure 2 A kind of guiding device structure schematic diagram of the deoxidizing and desulfurizing device for steel LF refining is provided for the utility model;

[0023] Figure 3 A kind of stirring device structure schematic diagram of the deoxidizing and desulfurizing device for steel LF refining is provided for the utility model.

[0024] Legend: 1, hydraulic cylinder;2, mounting frame;3, overturning frame;4, bottom plate;5, connecting frame;6, splash cover;7, furnace body;8, guiding device;801, external pipe;802, rotating ring;803, first tooth ring;804, connecting pipe;805, rotating groove;806, bottom box;807, gas distribution pipe;808, spray head;809, mounting plate;810, motor;811, driving wheel;9, stirring device;901, second tooth ring;902, rotating plate;903, gear;904, rotating rod;905, stirring rod. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0026] Please refer to Figure 1 - Figure 3The utility model provides a technical scheme: a kind of for molten steel LF refining's deoxidation desulfurization device, including bottom plate 4, bottom plate 4 top is connected with turnover frame 3, furnace body 7 is equipped between the inner wall of turnover frame 3, turnover frame 3 top is connected with mounting bracket 2, mounting bracket 2 top is fixedly installed with hydraulic cylinder 1, hydraulic cylinder 1 top rod penetrates mounting bracket 2 top and is connected with connecting frame 5, connecting frame 5 bottom is connected with splash cover 6, splash cover 6 bottom is equipped with guide device 8, guide device 8 includes mounting plate 809, motor 810 is fixedly installed on the side of mounting plate 809, motor 810 output shaft is connected with driving wheel 811, driving wheel 811 outer wall is engaged with first tooth ring 803, first tooth ring 803 inner wall is connected with connecting pipe 804, connecting pipe 804 inner wall is rotatably connected with external pipe 801, connecting pipe 804 bottom is communicated with bottom box 806, two gas distribution pipes 807 are communicated on the outer wall of bottom box 806, a plurality of spray heads 808 are communicated on the outer wall of gas distribution pipe 807, bearing is embedded in the top of splash cover 6, and bearing is rotatably connected with the outer wall of connecting pipe 804 in, and the bottom of mounting plate 809 is connected with the top of splash cover 6, rotating groove 805 is set up on the inner wall of connecting pipe 804, rotating ring 802 is connected on the outer wall of external pipe 801, and the outer wall of rotating ring 802 is attached to the inner wall of rotating groove 805 and is slidably connected, and the end of external pipe 801 away from first tooth ring 803 is soft pipe, and the end of external pipe 801 attached to the inner wall of connecting pipe 804 is rigid pipe.

[0027] Specific embodiments, by setting guide device 8, by motor 810 output shaft drives driving wheel 811 rotation, so that driving wheel 811 drives first tooth ring 803 rotation, first tooth ring 803 drives connecting pipe 804 rotation, by setting rotating groove 805 inner wall and rotating ring 802 outer wall are attached and rotate, so that rotating ring 802 seals the gap between external pipe 801 and connecting pipe 804, to improve the sealing between external pipe 801 and connecting pipe 804, then by connecting pipe 804 drives bottom box 806 rotation, bottom box 806 drives gas distribution pipe 807 rotation, gas distribution pipe 807 drives spray head 808 rotation, so that spray head 808 drives the inert gas blown and disperses, so that inert gas is evenly dispersed in molten steel, to improve the contact surface with molten steel, avoid inert gas to concentrate together to cause low mixing efficiency, to ensure deoxidation desulfurization efficiency, by setting splash cover 6, so that when stirring deoxidation desulfurization avoids molten steel to splash out due to stirring, to ensure the safety of surrounding personnel.

[0028] The outer wall of the connecting pipe 804 is connected with the stirring device 9, the stirring device 9 comprises a rotating plate 902, the two sides of the rotating plate 902 are embedded with another bearing, and the rotating shaft is rotatably connected in the another bearing, and the top of the rotating shaft is connected with a gear 903, and the bottom of the rotating shaft is connected with a rotating rod 904, and the outer wall of the two gears 903 is engaged with the same second tooth ring 901, the inner wall of the through groove is connected with the outer wall of the rotating plate 902, the top of the second tooth ring 901 is connected with the bottom of the splash-proof cover 6, and the outer wall of the rotating rod 904 is connected with a plurality of stirring rods 905.

[0029] Specifically, by setting the stirring device 9, the rotating plate 902 is driven to rotate by the connecting pipe 804, so that the rotating plate 902 drives the rotating rod 904 and the gear 903 to rotate respectively, the rotating rod 904 drives the stirring rod 905 to move, so that the stirring rod 905 is stirred and dispersed in a large range, and at the same time, the gear 903 moves in the second tooth ring 901, so that the gear 903 rotates, thereby driving the rotating rod 904 to rotate, and the rotating rod 904 drives the stirring rod 905 to rotate around the rotating rod 904 in a small range, thereby further improving the uniformity of the mixing of the inert gas in the molten steel and improving the deoxidization and desulfurization efficiency.

[0030] Working principle: in use, the molten steel is poured into the furnace body 7, then the hydraulic cylinder 1 drives the splash-proof cover 6 to move downward through the connecting frame 5, so that the bottom of the splash-proof cover 6 is attached to the top of the furnace body 7, then the motor 810 drives the driving wheel 811 to rotate, the driving wheel 811 drives the first tooth ring 803 to rotate, the first tooth ring 803 drives the connecting pipe 804 to rotate, the connecting pipe 804 drives the gas distribution pipe 807 to rotate through the bottom box 806, so that the inert gas blown by the nozzle 808 is uniformly dispersed in the molten steel, thereby ensuring the deoxidization and desulfurization efficiency, at the same time, the rotating plate 902 is driven to rotate by the connecting pipe 804, so that the rotating plate 902 drives the gear 903 and the rotating rod 904 to rotate, then the gear 903 moves in the inner wall of the second tooth ring 901, so that the second tooth ring 901 drives the gear 903 to rotate, the gear 903 drives the rotating rod 904 to rotate, so that the rotating rod 904 drives the stirring rod 905 to stir in a large range while the stirring rod 905 stirs around the rotating rod 904 in a small range, thereby the stirring rod 905 stirs and disperses the inert gas, further improving the mixing efficiency of the inert gas and the molten steel.

[0031] In the utility model, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance; the term "multiple" refers to two or more than two, unless otherwise expressly limited. The terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, "connection" can be fixed connection, or detachable connection, or integrally connected; "connected" can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances;

[0032] The above is only a preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered within the protection scope of the utility model.

Claims

1. A deoxidation and desulfurization device for LF refining of molten steel, comprising a base plate (4), characterized in that, The bottom plate (4) is connected to a tilting frame (3) at the top. A furnace body (7) is provided between the inner walls of the tilting frame (3). The tilting frame (3) is connected to a mounting frame (2) at the top. A hydraulic cylinder (1) is fixedly installed on the top of the mounting frame (2). The top rod of the hydraulic cylinder (1) passes through the top of the mounting frame (2) and is connected to a connecting frame (5). A splash guard (6) is connected to the bottom of the connecting frame (5). A guide device (8) is provided at the bottom of the splash guard (6). The guide device (8) includes a mounting plate (809). One side of the mounting plate (809) is fixed A motor (810) is fixedly installed. The output shaft of the motor (810) is connected to a drive wheel (811). A first toothed ring (803) meshes with the outer wall of the drive wheel (811). A connecting pipe (804) is connected to the inner wall of the first toothed ring (803). An outer pipe (801) is rotatably connected to the inner wall of the connecting pipe (804). A bottom box (806) is connected to the bottom of the connecting pipe (804). Two air distribution pipes (807) are connected to the outer wall of the bottom box (806). Multiple nozzles (808) are connected to the outer wall of the air distribution pipes (807).

2. The deoxidation and desulfurization device for LF refining of molten steel according to claim 1, characterized in that, The top of the splash cover (6) is fitted with a bearing, and the bearing is rotatably connected to the outer wall of the connecting pipe (804). The bottom of the mounting plate (809) is connected to the top of the splash cover (6).

3. A deoxidation and desulfurization device for LF refining of molten steel according to claim 1, characterized in that, The inner wall of the connecting pipe (804) is provided with a rotating groove (805), and the outer wall of the outer pipe (801) is connected with a rotating ring (802). The outer wall of the rotating ring (802) is attached to and slidably connected to the inner wall of the rotating groove (805).

4. A deoxidation and desulfurization device for LF refining of molten steel according to claim 1, characterized in that, The end of the outer tube (801) away from the first toothed ring (803) is a soft tube, and the end of the outer tube (801) that is in contact with the inner wall of the connecting tube (804) is a rigid tube.

5. A deoxidation and desulfurization device for LF refining of molten steel according to claim 1, characterized in that, The outer wall of the connecting pipe (804) is connected to an agitator (9). The agitator (9) includes a rotating plate (902). Another bearing is embedded on both sides of the rotating plate (902). A rotating shaft is rotatably connected inside the other bearing. A gear (903) is connected to the top of the rotating shaft. A rotating rod (904) is connected to the bottom of the rotating shaft. The outer walls of the two gears (903) are meshed with the same second toothed ring (901).

6. A deoxidation and desulfurization device for LF refining of molten steel according to claim 5, characterized in that, The rotating plate (902) has a through groove, and the inner wall of the through groove is connected to the outer wall of the rotating plate (902).

7. A deoxidation and desulfurization device for LF refining of molten steel according to claim 5, characterized in that, The top of the second toothed ring (901) is connected to the bottom of the splash cover (6), and multiple stirring rods (905) are connected to the outer wall of the rotating rod (904).

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