Smelting device for aluminum-containing low-temperature-resistant hot-rolled H-shaped steel

Abstract

The utility model relates to the technical field of steel smelting, and discloses a smelting device for aluminum-containing low-temperature-resistant hot-rolled H-shaped steel, which comprises a fixed bottom plate, connecting side plates are symmetrically mounted on the left side and the right side of the upper surface of the fixed bottom plate, rotating handles are rotatably mounted on the connecting side plates, and connecting plates are mounted on the rotating handles. The connecting plate is fixedly mounted on the outer surface of the smelting converter, and an upper top plate is fixedly mounted at the upper end of the connecting side plate. According to the smelting device for the aluminum-containing low-temperature-resistant hot-rolled H-shaped steel, a movable plate and an oxygen introducing pipe can be driven to move up and down through rotation of a rotating screw rod, namely, the oxygen introducing pipe can be moved to a proper height according to the height of the liquid level of molten steel in a smelting converter, and the oxygen introducing pipe and an exhaust plate are driven to rotate through rotation of a driven gear; the uniform effect that oxygen is introduced into the molten steel is effectively guaranteed, that is, bubbles and gas flow generated after the uniform oxygen is blown into a molten pool can violently stir the molten steel, component and temperature distribution is more uniform, and decarburization, desulfurization and other reactions are accelerated.

Description

Technical Field

[0001] This utility model relates to the field of steel smelting technology, specifically to a smelting apparatus for aluminum-containing low-temperature resistant hot-rolled H-beams. Background Technology

[0002] Aluminum-containing low-temperature resistant hot-rolled H-beams are a type of structural steel specifically designed for low-temperature environments. They combine aluminum alloying, hot rolling technology, and the cross-sectional advantages of H-beams. The production and processing of aluminum-containing low-temperature resistant hot-rolled H-beams requires the use of a converter for smelting. The steelmaking process is completed in the converter by generating heat through the physical heat of the molten iron itself and the chemical reaction between the molten iron components. At the same time, oxygen is introduced during the smelting process of H-beams, mainly to achieve decarburization through oxidation reaction, optimize the composition of molten steel, improve reaction efficiency, and control impurity content.

[0003] Currently, patent CN211999800U discloses a smelting apparatus for aluminum-containing low-temperature resistant hot-rolled H-beams. The apparatus includes a support frame and a fixed frame connected by a receiving plate, as well as a smelting converter and an oxygen lance. The smelting converter, supported by a mounting frame, is positioned between the support frame and the fixed frame. The bottom of the smelting converter has three bottom-blowing holes that connect to a bottom-blowing channel, on which a flow control valve is installed. A coolant pipe is located around the bottom-blowing channel. An oxygen lance tube is installed in the furnace cavity of the smelting converter, and the oxygen lance tube is glued to a fixed block. The fixed block is fixedly glued to a conveyor belt, and the conveyor belt's operation is controlled by a drive motor connected to a rotating shaft. The flow control valve controls the flow rate of the bottom-blowing gas, thereby adjusting the intensity of the stirring in the molten pool within the smelting converter. The stirring effect of the molten pool is enhanced by adjusting the intensity of the bottom-blowing gas supply. The drive motor drives the rotating shaft and conveyor belt to rotate clockwise, causing the rotating shaft to move upwards, which in turn moves the fixed block and oxygen lance tube upwards. By adjusting the height of the oxygen lance, the stirring power of the top-blown jet can be changed.

[0004] However, the above-mentioned smelting equipment still has the following problems during use: The equipment uses the rotation of the conveyor belt to adjust the height of the oxygen lance tube. Because the conveyor belt is a flexible belt, its driving effect is not good. During the oxygen introduction process, the conveyor belt is prone to deformation due to the impact of oxygen and the stirring of molten steel. That is, it is difficult to ensure the stability of the oxygen lance tube during use. In addition, when oxygen is introduced, only one outlet is set and the introduction position is fixed, which can easily cause uneven oxygen introduction. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a smelting device for aluminum-containing low-temperature resistant hot-rolled H-beams. The height of the oxygen pipe can be adjusted by rotating the screw, thus adapting to oxygenation at different liquid levels. The automatic reciprocating rotation during oxygenation effectively ensures the uniformity of oxygenation.

[0006] This utility model provides the following technical solution: a smelting device for aluminum-containing low-temperature resistant hot-rolled H-beams, comprising a fixed base plate, on which connecting side plates are symmetrically installed on the left and right sides of its upper surface. A rotating handle is rotatably installed on the connecting side plate, and a connecting plate is installed on the rotating handle. The connecting plate is fixedly installed on the outer surface of the smelting converter. An upper top plate is fixedly installed at the upper end of the connecting side plate, and a first motor is fixedly installed on the left side of the upper surface of the upper top plate. The output shaft of the first motor is connected to a pulley assembly, and a rotating screw is fixedly installed at the lower end of the pulley assembly. A movable plate is provided outside the rotating screw. A second motor is provided on the right side of the upper surface of the movable plate, and a driving gear is connected to the output shaft of the second motor. The driving gear and the driven gear mesh with each other, and an oxygen pipe is fixedly installed at the lower end of the driven gear. An exhaust plate is fixedly installed at the lower end of the oxygen pipe.

[0007] Furthermore, a first bearing is installed on the connecting side plate, and the rotating handle is rotatably connected to the connecting side plate through the first bearing installed on the connecting side plate. A first threaded hole is provided on the connecting side plate, and a fastening screw is provided through the rotating handle. The fastening screw is connected to the connecting side plate through the first threaded hole. With the above structure, the rotating handle can be fixed under the action of the fastening screw to prevent the rotating handle from rotating during the smelting process.

[0008] Furthermore, a receiving plate is fixedly installed at the lower end of the smelting converter, and a bottom blowing pipe is installed through the receiving plate. The bottom blowing pipe is installed through the lower end of the smelting converter. Through the above structure, it is convenient to achieve uniform ventilation to the bottom of the smelting converter under the action of the bottom blowing pipe, so as to achieve the effect of stirring the molten steel.

[0009] Furthermore, a second bearing is installed on the upper top plate, and the rotating screw is rotatably connected to the upper top plate through the second bearing installed on the upper top plate. A second threaded hole is opened on the movable plate, and the rotating screw is threadedly connected to the movable plate through the second threaded hole opened on the movable plate. With the above structure, it is convenient to support the rotating screw without affecting its rotation. As the rotating screw rotates, it can drive the movable plate to move up and down, thereby achieving the purpose of ventilating at different liquid levels.

[0010] Furthermore, both the driving gear and the driven gear are connected to the moving plate as rotating wheels, and the driving gear is configured as a half-gear structure. Through the above structure, the rotation of the driving gear can drive the driven gear to rotate together.

[0011] Furthermore, a spiral spring is fixedly installed on the outer surface of the upper end of the oxygen tube, and the spiral spring is connected to the annular plate. The annular plate is fixedly installed on the upper surface of the movable plate. Through the above structure, the oxygen tube can be rotated back to its original position under the action of the spiral spring.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This smelting device for aluminum-containing low-temperature resistant hot-rolled H-beams can move a movable plate and oxygen pipe up and down by rotating a screw. This allows the oxygen pipe to be moved to a suitable height according to the height of the molten steel in the converter, ensuring effective ventilation of the molten steel. Furthermore, the rotation of the driven gear drives the oxygen pipe and exhaust plate to rotate, effectively ensuring uniform oxygen flow into the molten steel. The bubbles and gas flow generated after the uniform oxygen is blown into the molten pool can vigorously agitate the molten steel, making the composition and temperature distribution more uniform and accelerating decarburization, desulfurization, and other reactions. By rotating the handle, the smelting converter can be tilted, allowing the molten steel that has been smelted to be poured out. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0015] Figure 2 This is a schematic diagram of the three-dimensional cross-sectional structure of the smelting converter of this utility model;

[0016] Figure 3 This is a three-dimensional structural diagram of the active gear of this utility model;

[0017] Figure 4 This utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0018] Figure 5 This is a three-dimensional structural diagram of the bottom-blowing pipe of this utility model.

[0019] In the diagram: 1. Fixed base plate; 2. Connecting side plate; 3. Rotating handle; 4. Connecting plate; 5. Smelting converter; 6. Fastening screw; 7. Receiving plate; 8. Bottom blowing pipe; 9. First motor; 10. Top plate; 11. Pulley assembly; 12. Rotating screw; 13. Moving plate; 14. Driving gear; 15. Driven gear; 16. Oxygen pipe; 17. Scroll spring; 18. Annular plate; 19. Exhaust plate; 20. Second motor. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Please see Figures 1-5 This utility model provides a technical solution: a smelting device for aluminum-containing low-temperature resistant hot-rolled H-beams, comprising a fixed base plate 1, on which connecting side plates 2 are symmetrically installed on the left and right sides of its upper surface. An upper top plate 10 is fixedly installed on the upper end of the connecting side plates 2, and a first motor 9 is fixedly installed on the left side of the upper surface of the upper top plate 10. A pulley assembly 11 is connected to the output shaft of the first motor 9, and a rotating screw 12 is fixedly installed at the lower end of the pulley assembly 11. A movable plate 13 is provided outside the rotating screw 12, and a second motor 20 is provided on the right side of the upper surface of the movable plate 13. A drive gear 14 is connected to the output shaft of the second motor 20. The drive gear 14 meshes with a driven gear 15, and an oxygen pipe 16 is fixedly installed at the lower end of the driven gear 15. An exhaust plate 19 is fixedly installed at the lower end of the oxygen pipe 16. A receiving plate 7 is fixedly installed at the lower end of the smelting converter 5, and a bottom blowing pipe 8 is installed through the receiving plate 7. The bottom blowing pipe 8 is installed through the lower end of the smelting converter 5. A second bearing is installed on the upper top plate 10, and the rotating screw 12 is rotatably connected to the upper top plate 10 through the second bearing installed on the upper top plate 10. A second threaded hole is opened on the moving plate 13, and the rotating screw 12 is threadedly connected to the moving plate 13 through the second threaded hole opened on the moving plate 13. The driving gear 14 and the driven gear 15 are both connected to the moving plate 13 as rotating wheels, and the driving gear 14 is set as a half gear structure. A spiral spring 17 is fixedly installed on the outer surface of the upper end of the oxygen pipe 16, and the spiral spring 17 is connected to the annular plate 18. The annular plate 18 is fixedly installed on the upper surface of the moving plate 13.

[0022] When molten steel needs to be smelted, it is poured into the smelting converter 5 (the molten steel is mainly composed of iron, scrap steel, and ferroalloys). Then, the first motor 9 is started. Since the output shaft of the first motor 9 is connected to a pulley assembly 11, the pulley assembly 11 begins to rotate. Because the pulley assembly 11 is connected to the rotating screw 12, the rotating screw 12 also begins to rotate. Furthermore, because the rotating screw 12 is connected to the moving plate 13 through a second threaded hole, the moving plate 13 begins to move downwards as the rotating screw 12 rotates. An oxygen pipe 16 is located in the middle of the moving plate 13. At this point, the oxygen supply pipe 16 moves the exhaust plate 19 downwards until it contacts the molten steel (both the surfaces of the oxygen supply pipe 16 and the exhaust plate 19 are coated with nano-graphite composite coating, giving them high temperature resistance and non-stick properties to the molten steel). This continues until the oxygen supply pipe 16 and the exhaust plate 19 reach their designated positions in the molten steel. Then, oxygen is introduced into the oxygen supply pipe 16 through a flexible pipe (connected to oxygen cylinders and oxygen tanks) located on its upper side. This allows oxygen to be introduced into the molten steel, thus allowing it to... The reaction with the molten steel simultaneously agitates it. At the same time, the second motor 20 starts operating. Since the output shaft of the second motor 20 is connected to a drive gear 14, and the drive gear 14 meshes with the driven gear 15, the driven gear 15 also begins to rotate as the drive gear 14 rotates. Because an oxygen pipe 16 is installed at the lower end of the driven gear 15, it also begins to rotate. The spiral spring 17 installed outside the oxygen pipe 16 begins to deform under pressure. As the drive gear 14 rotates, it no longer meshes with the driven gear 15. Under the action of the spiral spring 17 recovering its deformation, the spiral... Spring 17 then drives oxygen pipe 16 and driven gear 15 to rotate in the opposite direction, that is, drives oxygen pipe 16 and driven gear 15 to rotate back to their original positions, achieving the purpose of reciprocating rotation for ventilation, ensuring the uniformity of oxygen supply. At the same time, bottom blowing pipe 8 begins to ventilate the lower end of smelting converter 5. The lower end of bottom blowing pipe 8 is made of flexible hose, and the flexible hose is connected to an external oxygen cylinder or oxygen tank. The gas in bottom blowing pipe 8 must be kept at a constant pressure higher than the static pressure of molten steel to form a gas barrier, preventing molten steel from seeping back into bottom blowing pipe 8. By ventilating from both the top and bottom simultaneously, the purpose of fully stirring the molten steel can be achieved, ensuring the smelting effect.

[0023] A rotating handle 3 is rotatably mounted on the connecting side plate 2, and a connecting plate 4 is mounted on the rotating handle 3. The connecting plate 4 is fixedly mounted on the outer surface of the smelting converter 5. A first bearing is mounted on the connecting side plate 2, and the rotating handle 3 is rotatably connected to the connecting side plate 2 through the first bearing mounted on the connecting side plate 2. A first threaded hole is opened on the connecting side plate 2, and a fastening screw 6 is passed through the rotating handle 3. The fastening screw 6 is connected to the connecting side plate 2 through the first threaded hole opened on the connecting side plate 2.

[0024] After the molten steel is smelted, turn the fastening screw 6 to move it away from the rotating handle 3 until the fastening screw 6 is no longer connected to the first threaded hole on the connecting side plate 2. At this time, the rotating handle 3 can be turned. As the rotating handle 3 is turned, the smelting converter 5 connected to the rotating handle 3 will also start to rotate. At this time, the molten steel in the smelting converter 5 can be poured out, which is more convenient and faster.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A smelting apparatus for aluminum-containing low-temperature resistant hot-rolled H-beams, comprising a fixed base plate (1), wherein connecting side plates (2) are symmetrically installed on the left and right sides of its upper surface, characterized in that, Also includes: A rotating handle (3) is rotatably mounted on the connecting side plate (2), and a connecting plate (4) is mounted on the rotating handle (3). The connecting plate (4) is fixedly mounted on the outer surface of the smelting converter (5). An upper top plate (10) is fixedly mounted on the upper end of the connecting side plate (2), and a first motor (9) is fixedly mounted on the left side of the upper surface of the upper top plate (10). The output shaft of the first motor (9) is connected to a pulley group (11), and a rotating screw (12) is fixedly mounted on the lower end of the pulley group (11). A moving plate (13) is provided outside the rotating screw (12). A second motor (20) is provided on the right side of the upper surface of the moving plate (13), and a driving gear (14) is connected to the output shaft of the second motor (20). The driving gear (14) meshes with the driven gear (15), and an oxygen pipe (16) is fixedly mounted on the lower end of the driven gear (15). An exhaust plate (19) is fixedly mounted on the lower end of the oxygen pipe (16).

2. The smelting apparatus for aluminum-containing low-temperature resistant hot-rolled H-beams according to claim 1, characterized in that: The connecting side plate (2) is equipped with a first bearing, and the rotating handle (3) is rotatably connected to the connecting side plate (2) through the first bearing installed on the connecting side plate (2). The connecting side plate (2) is provided with a first threaded hole, and a fastening screw (6) is provided through the rotating handle (3). The fastening screw (6) is connected to the connecting side plate (2) through the first threaded hole opened on the connecting side plate (2).

3. The smelting apparatus for aluminum-containing low-temperature resistant hot-rolled H-beams according to claim 1, characterized in that: The lower end of the smelting converter (5) is fixedly installed with a receiving plate (7), and a bottom blowing pipe (8) is provided through the receiving plate (7). The bottom blowing pipe (8) is installed through the lower end of the smelting converter (5).

4. The smelting apparatus for aluminum-containing low-temperature resistant hot-rolled H-beams according to claim 1, characterized in that: The upper top plate (10) is equipped with a second bearing, and the rotating screw (12) is rotatably connected to the upper top plate (10) through the second bearing installed on the upper top plate (10). The moving plate (13) is provided with a second threaded hole, and the rotating screw (12) is threadedly connected to the moving plate (13) through the second threaded hole opened on the moving plate (13).

5. The smelting apparatus for aluminum-containing low-temperature resistant hot-rolled H-beams according to claim 1, characterized in that: Both the driving gear (14) and the driven gear (15) are connected to the moving plate (13) as rotating wheels, and the driving gear (14) is configured as a half-gear structure.

6. The smelting apparatus for aluminum-containing low-temperature resistant hot-rolled H-beams according to claim 1, characterized in that: A spiral spring (17) is fixedly installed on the outer surface of the upper end of the oxygen pipe (16), and the spiral spring (17) is connected to the annular plate (18), and the annular plate (18) is fixedly installed on the upper surface of the movable plate (13).

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