Oxygen supply system for improving metallurgical quality of high-carbon steel

Abstract

The utility model discloses an oxygen supply system for improving metallurgical quality of high-carbon steel, which comprises an oxygen delivery pipeline and oxygen lance equipment laid from an oxygen factory, a first valve is arranged on the oxygen delivery pipeline, the oxygen delivery pipeline is communicated with a first delivery pipe with a second valve, the first delivery pipe is connected with the oxygen lance equipment, and the oxygen lance equipment is connected with the oxygen supply pipeline. The first conveying pipe is connected with an oxygen storage tank through a second conveying pipe, and a third valve is arranged on the second conveying pipe. According to the oxygen supply system for improving the metallurgical quality of the high-carbon steel, when the oxygen conveying pipeline is overhauled, standby oxygen is conveniently provided, and normal production work of a steel mill is ensured.

Description

Technical Field

[0001] This utility model relates to the field of steelmaking technology, specifically to an oxygen supply system for improving the metallurgical quality of high-carbon steel. Background Technology

[0002] In the refining of high-carbon steel, in order to improve the purity control of special steel, high carbon extraction technology is explored to solve the problem of steel over-oxidation. Increasing the carbon content can reduce the amount of alloy added and reduce production costs. Currently, when increasing the carbon content, oxygen is usually injected into the converter using an oxygen lance. The oxygen is generally sourced from oxygen plants through pipelines, which deliver high-pressure, high-purity oxygen. The oxygen is then injected into the converter at high speed by the oxygen lance. The current problem is that when the pipeline needs maintenance, oxygen cannot be supplied to the converter, which will delay the steel plant's production. Therefore, this application proposes an oxygen supply system that can solve the above problems. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides an oxygen supply system for improving the metallurgical quality of high-carbon steel, which facilitates the provision of backup oxygen during the maintenance of oxygen pipelines, ensuring the normal production operations of steel plants.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: an oxygen supply system for improving the metallurgical quality of high-carbon steel, comprising an oxygen delivery pipeline and an oxygen lance device laid from an oxygen plant, a first valve on the oxygen delivery pipeline, the oxygen delivery pipeline being connected to a first conveying pipe with a second valve, the first conveying pipe being connected to the oxygen lance device, an oxygen storage tank being connected to the first conveying pipe via a second conveying pipe, a third valve on the second conveying pipe, and a high-pressure conveying mechanism connecting the side of the second conveying pipe above the third valve to the first conveying pipe;

[0005] The oxygen storage tank is equipped with a piston rod, one end of which is equipped with a piston. A pressure sensor is located on the side of the piston facing the second delivery pipe. The other end of the piston passes through the oxygen storage tank and is connected to a horizontal plate. The horizontal plate is connected to a reset mechanism.

[0006] Preferably, the high-pressure conveying mechanism includes a third conveying pipe connected to the second conveying pipe, the third conveying pipe being connected to a high-pressure pump, and the high-pressure pump being connected to the first conveying pipe via a fourth conveying pipe.

[0007] Preferably, the reset mechanism includes telescopic mechanisms provided on the front and rear sides of the oxygen storage tank, the telescopic end of the telescopic mechanism is provided with a vertically arranged bidirectional cylinder, and the two ends of the bidirectional cylinder are provided with locking blocks.

[0008] Preferably, the telescopic mechanism is a hydraulic rod.

[0009] Preferably, the oxygen storage tank is provided with a distance sensor on its side opposite to the horizontal plate.

[0010] This utility model provides an oxygen supply system for improving the metallurgical quality of high-carbon steel, which has the following features:

[0011] Beneficial effects:

[0012] This oxygen supply system, designed to improve the metallurgical quality of high-carbon steel, can directly supply high-pressure, high-purity oxygen to the oxygen lance equipment through oxygen pipelines and the first delivery pipe. When the oxygen pipelines are under maintenance, the high-pressure, high-purity oxygen can be temporarily stored in an oxygen storage tank and temporarily supplied to the oxygen lance equipment through a high-pressure delivery mechanism. The two systems work together to ensure the efficiency of steel production in the converter and the normal operation of the converter's oxygen supply. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a front view structural diagram of the present invention;

[0015] Figure 3 This is a top view of the structure of this utility model;

[0016] Figure 4 This is a front view cross-sectional structural diagram of the oxygen storage tank of this utility model.

[0017] In the diagram: 1. Oxygen delivery pipeline; 2. First valve; 3. Second valve; 4. First delivery pipe; 5. Oxygen lance; 6. Second delivery pipe; 7. Oxygen storage tank; 8. Third valve; 9. Piston rod; 10. Piston; 11. Pressure sensor; 12. Horizontal plate; 13. Third delivery pipe; 14. High-pressure pump; 15. Fourth delivery pipe; 16. Fifth delivery pipe; 17. Two-way cylinder; 18. Clamping block; 19. Hydraulic rod; 20. Distance sensor. Detailed Implementation

[0018] The present invention will be further described below with reference to specific embodiments, such as... Figures 1 to 4 As shown:

[0019] Example 1: An oxygen supply system for improving the metallurgical quality of high carbon steel includes an oxygen pipeline 1 laid from an oxygen plant and an oxygen lance device 5. The oxygen pipeline 1 is equipped with a first valve 2 and is connected to a first delivery pipe 4 equipped with a second valve 3. The first valve 2 controls whether oxygen can enter the first delivery pipe 4. The first delivery pipe 4 is connected to the oxygen lance device 5. When the oxygen pipeline is in normal use, oxygen can be directly delivered into the oxygen lance device 5, and the oxygen through the oxygen lance device 5 enters the converter at a very high speed.

[0020] An oxygen storage tank 7 is connected to the first delivery pipe 4 via a second delivery pipe 6. A third valve 8 is provided on the second delivery pipe 6. A high-pressure delivery mechanism is connected to the first delivery pipe 4 on the side of the second delivery pipe 6 above the third valve 8. The connection between the high-pressure delivery mechanism and the first delivery pipe 4 is located between the second valve 3 and the oxygen gun device 5.

[0021] When the oxygen pipeline 1 of the oxygen plant needs maintenance or repair, in order to ensure the needs of steelmaking, the oxygen can be temporarily stored in the oxygen storage tank 7 through the second transmission pipe 6. When the oxygen in the oxygen storage tank 7 is used, the first valve 2 and the second valve 3 are closed, and the oxygen is transported to the oxygen lance equipment 5 through the high-pressure transmission mechanism.

[0022] The oxygen storage tank 7 is equipped with a piston rod 9, one end of which is equipped with a piston 10. A pressure sensor 11 is provided on the side of the piston 10 facing the second delivery pipe 6. The other end of the piston 10 passes through the oxygen storage tank 7 and is connected to a horizontal plate 12. When the horizontal plate 12 contacts the oxygen storage tank 7, the piston 10 is on the right side of the second delivery pipe 6.

[0023] There is also an air inlet pipe on the right side of the oxygen storage tank 7, located above the horizontal plate 12;

[0024] With the piston rod 9 and piston 10 in place, after oxygen enters the oxygen storage tank 7, the piston can be pushed to the right until the piston 10 contacts the side of the oxygen storage tank 7. The pressure sensor 11 can detect the pressure value in the oxygen storage tank 7, thereby stopping the injection of oxygen into the oxygen storage tank 7.

[0025] The horizontal plate 12 is connected to a reset mechanism. With the reset mechanism, after the oxygen is discharged from the oxygen storage tank 7, the piston 10 can be driven to move to the left.

[0026] Example 2: An oxygen supply system for improving the metallurgical quality of high carbon steel includes an oxygen pipeline 1 laid from an oxygen plant and an oxygen lance device 5. The oxygen pipeline 1 is equipped with a first valve 2 and is connected to a first delivery pipe 4 with a second valve 3. The first valve 2 controls whether oxygen can enter the first delivery pipe 4. The first delivery pipe 4 is connected to the oxygen lance device 5. When the oxygen pipeline is in normal use, oxygen can be directly delivered into the oxygen lance device 5, and the oxygen through the oxygen lance device 5 enters the converter at a very high speed.

[0027] An oxygen storage tank 7 is connected to the first delivery pipe 4 via a second delivery pipe 6. At least one set of oxygen storage tanks 7 is provided. A third valve 8 is provided on the second delivery pipe 6. The side of the second delivery pipe 6 above the third valve 8 is connected to the first delivery pipe 4 via a high-pressure delivery mechanism. The connection between the high-pressure delivery mechanism and the first delivery pipe 4 is located between the second valve 3 and the oxygen gun device 5.

[0028] The high-pressure conveying mechanism includes a third conveying pipe 13 connected to the second conveying pipe 6, and a high-pressure pump 14 connected to the third conveying pipe 13. The high-pressure pump 14 is connected to the first conveying pipe 4 through a fourth conveying pipe 15.

[0029] When the oxygen pipeline 1 of the oxygen plant needs maintenance or repair, in order to ensure the needs of steelmaking, the oxygen can be temporarily stored in the oxygen storage tank 7 through the second transmission pipe 6. When the oxygen in the oxygen storage tank 7 is used, the first valve 2 and the second valve 3 are closed, and the oxygen is transported to the oxygen lance equipment 5 through the high-pressure transmission mechanism.

[0030] The oxygen storage tank 7 is equipped with a piston rod 9, one end of which is equipped with a piston 10. A pressure sensor 11 is provided on the side of the piston 10 facing the second delivery pipe 6. The other end of the piston 10 passes through the oxygen storage tank 7 and is connected to a horizontal plate 12. When the horizontal plate 12 contacts the oxygen storage tank 7, the piston 10 is on the right side of the second delivery pipe 6.

[0031] There is also an air inlet pipe on the right side of the oxygen storage tank 7, located above the horizontal plate 12;

[0032] With the piston rod 9 and piston 10 in place, after oxygen enters the oxygen storage tank 7, it can push the piston to the right until the piston 10 contacts the side of the oxygen storage tank 7. The pressure sensor 11 can detect the pressure value in the oxygen storage tank 7, thereby stopping the injection of oxygen into the oxygen storage tank 7.

[0033] The horizontal plate 12 is connected to a reset mechanism, which includes a telescopic mechanism set on both the front and rear sides of the oxygen storage tank 7. The telescopic end of the telescopic mechanism is provided with a vertically set bidirectional cylinder 17, and both ends of the bidirectional cylinder 17 are provided with locking blocks 18. The telescopic mechanism adopts a hydraulic rod 19.

[0034] With the reset mechanism, when the telescopic mechanism retracts to its original position, the bidirectional cylinder 17 can clamp the horizontal plate 12 through the locking block 18 and move synchronously to the oxygen storage tank 7. After the oxygen is discharged from the oxygen storage tank 7, the horizontal plate 12 can drive the piston 10 to move to the left, so as to keep the oxygen pressure in the oxygen storage tank 7 in a certain range as much as possible, so as to facilitate the supply of oxygen to the oxygen gun device 5.

[0035] After the oxygen pipeline 1 is repaired, oxygen should be injected into the oxygen storage tank 7 in a timely manner.

[0036] The oxygen storage tank 7 has a distance sensor 20 on its side opposite to the horizontal plate 12.

[0037] Working principle:

[0038] 1. When the first valve 2 and the second valve 3 are opened, the oxygen supply pipeline 1 from the oxygen plant supplies oxygen directly to the oxygen lance equipment 5 through the first delivery pipe 4. The oxygen lance equipment 5 then discharges high-pressure, high-purity oxygen into the converter at high speed.

[0039] 2. Before the oxygen plant needs to inspect and maintain the oxygen supply pipeline 1, with the oxygen gun equipment 5 idle, close the second valve 3 and open the third valve 8. Inject oxygen into the oxygen storage tank 7 through the oxygen supply pipeline 1 and the second delivery pipe 6. The injected oxygen is high-pressure, high-purity oxygen. The oxygen pressure can be detected by the pressure sensor 11. After the oxygen enters the oxygen storage tank 7, it can push the piston 10 and piston rod 9 to move to the right until they contact the side wall of the oxygen storage tank 7. At the same time, the distance sensor 20 can detect the distance the horizontal plate 20 moves. When the horizontal plate 12 stops moving, the distance detected by the distance sensor 20 remains unchanged. The piston 10 contacts the side wall of the oxygen storage tank 7, indicating that the oxygen injection is complete. Then close the first valve 2 and the third valve 8 in time.

[0040] 3. When the oxygen plant needs to repair the oxygen pipeline and needs to inject oxygen into the converter through the oxygen lance equipment 5, close the first valve 2 and the second valve 3, open the third valve 8, and use the high-pressure pump 14 to inject oxygen from the oxygen storage tank 7 into the oxygen lance equipment 5 through the third delivery pipe 13, the fourth delivery pipe 15 and the first delivery pipe 4. The oxygen lance equipment 5 can inject high-pressure, high-purity oxygen into the converter at high speed. After the oxygen injection is completed, close the third valve 8 in time.

[0041] 4. After the maintenance of oxygen pipeline 1 is completed, oxygen should be replenished to oxygen storage tank 7 in a timely manner.

[0042] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An oxygen supply system for improving the metallurgical quality of high-carbon steel, comprising an oxygen delivery pipeline (1) laid from an oxygen plant and an oxygen lance device (5), wherein the oxygen delivery pipeline (1) is provided with a first valve (2), the oxygen delivery pipeline (1) is connected to a first conveying pipe (4) with a second valve (3), and the first conveying pipe (4) is connected to the oxygen lance device (5), characterized in that: An oxygen storage tank (7) is connected to the first delivery pipe (4) via a second delivery pipe (6). A third valve (8) is provided on the second delivery pipe (6). The side of the second delivery pipe (6) above the third valve (8) is connected to the first delivery pipe (4) via a high-pressure delivery mechanism. The oxygen storage tank (7) is provided with a piston rod (9), one end of which is provided with a piston (10), and a pressure sensor (11) is provided on the side of the piston (10) facing the second delivery pipe (6). The other end passes through the oxygen storage tank (7) and is connected to a horizontal plate (12). The horizontal plate (12) is connected to a reset mechanism.

2. The oxygen supply system for improving the metallurgical quality of high-carbon steel according to claim 1, characterized in that: The high-pressure conveying mechanism includes a third conveying pipe (13) connected to the second conveying pipe (6), and the third conveying pipe (13) is connected to a high-pressure pump (14). The high-pressure pump (14) is connected to the first conveying pipe (4) through a fourth conveying pipe (15).

3. The oxygen supply system for improving the metallurgical quality of high-carbon steel according to claim 1, characterized in that: The reset mechanism includes a telescopic mechanism provided on both the front and rear sides of the oxygen storage tank (7). The telescopic end of the telescopic mechanism is provided with a vertically arranged bidirectional cylinder (17), and both ends of the bidirectional cylinder (17) are provided with locking blocks (18).

4. An oxygen supply system for improving the metallurgical quality of high-carbon steel according to claim 3, characterized in that: The telescopic mechanism uses a hydraulic rod (19).

5. An oxygen supply system for improving the metallurgical quality of high-carbon steel according to claim 1, characterized in that: The oxygen storage tank (7) is provided with a distance sensor (20) on its side opposite to the horizontal plate (12).

Images