Forging and pressing oxygen lance nozzle

Abstract

The utility model belongs to the technical field of steelmaking equipment, and discloses a forging oxygen lance nozzle which comprises a nozzle front end, a water diversion plate is fixedly installed on one end face of the nozzle front end, a nozzle rear end is fixedly installed at the other end of the water diversion plate, and a nozzle center end face is arranged in the middle of the face, away from the water diversion plate, of the nozzle front end. A protruding point is arranged in the middle of the face, close to the water distribution plate, of the front end of the spray head, a plurality of oxygen channels are annularly arrayed on the face, close to the water distribution plate, of the front end of the spray head with the protruding point as the center, and a first reinforcing rib is fixedly connected between each oxygen channel and the protruding point. A plurality of second reinforcing rib groups are annularly arrayed between the nozzle front end and the nozzle rear end and close to the edge of the nozzle front end; the oxygen spraying device is simple in overall structure and can achieve a more efficient oxygen spraying effect; and according to the use requirements of different customers on the spray head, the effects of oxygen blowing time, temperature rising, slagging, stirring and the like can be accurately optimized, and the use effect is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of steelmaking equipment, and specifically relates to a forging oxygen lance nozzle. Background Art

[0002] The oxygen lance nozzle is used for oxygen blowing in metallurgical converters for steelmaking, and its performance and service life directly affect the production efficiency and production cost of converter steelmaking. The forging nozzle is the third stage of the development of oxygen lance nozzles, and its performance and service life are more than twice that of the casting nozzle. The main characteristics of this nozzle are: the nozzle end and the oxygen column are formed by extrusion, and its density is much higher than that of the casting nozzle. It not only eliminates the inevitable casting defects such as pores, sand holes, slag inclusions, and looseness in the casting nozzle, but also the smooth inner surface greatly improves the heat conduction ability of the nozzle, increases the cooling effect and the anti-deformation ability of the nozzle, durability and the erosion resistance of the nozzle holes, thereby improving the service life of the nozzle and the stability of oxygen blowing. At the same time, the rest of the nozzle adopts a combined method, and the cooling water channel can achieve accurate manufacturing dimensions, which are all impossible for casting nozzles.

[0003] Actual production has proved that the forging nozzle has a long service life, good blowing stability, fast slag melting, good slag splashing effect, and significantly improved blowing effect.

[0004] However, due to the extremely harsh working environment of the nozzle, the temperature of the reaction zone formed after the oxygen jet is ejected is as high as about 1500 - 2000 °C. The nozzle is eroded and soaked by high temperature and continuously splashing molten slag and molten steel, and gradually melts and thins; due to the frequent rapid cooling and heating of the temperature, cracks gradually appear at the nozzle end, and as the use time continues, the cracks gradually expand until the end leaks water and is scrapped. Research has proved that under the harsh working environment, the material performance of the nozzle deteriorates, causing the deformation of the nozzle holes, thereby changing the performance state of the oxygen jet ejected by the oxygen, and it cannot contact the reaction media such as molten steel well enough, resulting in insufficient reaction and slowing down the production process. Summary of the Utility Model

[0005] The main technical problem to be solved by the utility model is to provide a forging oxygen lance nozzle with a simple overall structure, which can achieve a more efficient oxygen jetting effect; and can accurately optimize the manufacturing of the oxygen blowing time, temperature rise, slag melting, stirring and other effects according to the usage requirements of different customers for the nozzle, so as to improve the usage effect.

[0006] To solve the above technical problems, the utility model provides the following technical solutions:

[0007] A forging oxygen lance nozzle, including the front end of the nozzle, a water distribution plate is fixedly installed on one end surface of the front end of the nozzle, the other end of the water distribution plate is fixedly installed with the rear end of the nozzle, a nozzle center end surface is arranged at the middle position of the surface of the front end of the nozzle away from the water distribution plate, a bump is arranged at the middle position of the surface of the front end of the nozzle close to the water distribution plate, and a plurality of oxygen channels are annularly arranged around the bump on the surface of the front end of the nozzle close to the water distribution plate. A first reinforcing rib is fixedly connected between each oxygen channel and the bump. A plurality of second reinforcing rib groups are annularly arranged between the front end of the nozzle and the rear end of the nozzle and close to the edge position of the front end of the nozzle. Each group of second reinforcing rib groups is located between two adjacent oxygen channels.

[0008] The following is the further optimization of the above technical solution by the present invention:

[0009] The front end of the nozzle, the water distribution plate and the rear end of the nozzle are all made by forging with pure copper material.

[0010] Further optimization: The connection methods between the front end of the nozzle, the water distribution plate and the rear end of the nozzle are respectively fixed by welding.

[0011] Further optimization: The thickness of the first reinforcing rib is set to be the same as the thickness of the nozzle center end surface.

[0012] Further optimization: The second reinforcing rib group includes two second reinforcing ribs arranged symmetrically.

[0013] Further optimization: The two second reinforcing ribs are both located between two adjacent oxygen channels.

[0014] Further optimization: The second reinforcing rib is fixedly connected between the front end of the nozzle and the rear end of the nozzle by welding.

[0015] The present invention adopts the above technical solution, with ingenious conception and reasonable structure. The front end of the nozzle, the water distribution plate and the rear end of the nozzle of the forging oxygen lance nozzle are all formed by integral forging process, and then supported by welding and machining, ensuring the tightness and stability of the overall structure of the nozzle. At the same time, by setting the first reinforcing rib and the second reinforcing rib group, the overall structure of the nozzle is further stabilized and strengthened, greatly improving the overall strength and compressive capacity of the nozzle. After use, the service life of the nozzle can be extended by more than 30%, reducing the equipment maintenance cost and the risk of production interruption, and the overall structure is simple, reducing the production and manufacturing cost and being convenient to use.

[0016] The oxygen channels in the nozzle adopt Laval nozzle-shaped oxygen channels. This design can make the high-pressure oxygen form a stable supersonic oxygen jet after entering the nozzle, not only increasing the flow rate of oxygen, but also enabling the supersonic oxygen to stir the molten steel in the furnace more evenly when spraying, improving the efficiency of the steelmaking reaction.

[0017] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments. Description of the Drawings

[0018] Figure 1 It is a schematic cross-sectional view of the overall structure in the embodiment of the present utility model in the transverse planing direction;

[0019] Figure 2 It is a schematic cross-sectional view of the A-A plane in the embodiment of the present utility model.

[0020] In the figure: 1. Front end of the nozzle; 2. Water distribution plate; 3. Rear end of the nozzle; 4. First reinforcing rib; 5. Second reinforcing rib group; 51. Second reinforcing rib; 6. Convex point; 7. Central end face of the nozzle; 8. Oxygen channel. Detailed Embodiment

[0021] As Figure 1-2 shown: A forging oxygen lance nozzle includes a front end 1 of the nozzle. A water distribution plate 2 is fixedly installed on one end face of the front end 1 of the nozzle. A rear end 3 of the nozzle is fixedly installed at the other end of the water distribution plate 2. A central end face 7 of the nozzle is arranged at the middle position of the surface of the front end 1 of the nozzle away from the water distribution plate 2. A convex point 6 is arranged at the middle position of the surface of the front end 1 of the nozzle close to the water distribution plate 2. A plurality of oxygen channels 8 are annularly arranged around the convex point 6 on the surface of the front end 1 of the nozzle close to the water distribution plate 2. A first reinforcing rib 4 is fixedly connected between each oxygen channel 8 and the convex point 6. A plurality of second reinforcing rib groups 5 are annularly arranged between the front end 1 of the nozzle and the rear end 3 of the nozzle and close to the edge position of the front end 1 of the nozzle. Each second reinforcing rib group 5 is respectively located between two adjacent oxygen channels 8.

[0022] In this embodiment, the front end 1 of the nozzle, the water distribution plate 2 and the rear end 3 of the nozzle are all forged from pure copper material.

[0023] The connection modes between the front end 1 of the nozzle, the water distribution plate 2 and the rear end 3 of the nozzle are respectively fixed by welding.

[0024] The joints between the front end 1 of the nozzle, the water distribution plate 2 and the rear end 3 of the nozzle are firmly welded by silver brazing.

[0025] After the front end 1 of the nozzle, the water distribution plate 2 and the rear end 3 of the nozzle are welded, through machining, the front end 1 of the nozzle, the water distribution plate 2 and the rear end 3 of the nozzle are integrally formed into a concentric gradient step.

[0026] The function of the convex point 6 is to help the material in the nozzle flow better in all directions. When forging the nozzle material, the convex point 6 can ensure that the material fills the mold cavity evenly from the center to the edge, ensure that the wall thickness of each part of the nozzle is relatively uniform, is beneficial to the final forming quality of the nozzle, and makes the shape of the nozzle more accurate;

[0027] Meanwhile, the bump 6 can guide the material flow direction, reduce the stress concentration phenomenon caused by uneven metal flow, and reduce the probability of defects such as cracks in the nozzle, that is, improve the stress distribution inside the nozzle.

[0028] In this embodiment, the number of the oxygen channels 8 is set to six. During use, oxygen is output through the oxygen channels 8.

[0029] The oxygen channel 8 adopts a Laval nozzle-shaped design. The Laval nozzle-shaped oxygen channel is a pipe structure that first contracts and then expands, which is used to accelerate the oxygen flow and make it reach a higher speed at the outlet. Its specific principle and structure are already well-known and widely used in the prior art, so they will not be elaborated here.

[0030] The oxygen channel 8 can make the high-pressure oxygen form a stable supersonic oxygen jet after entering the nozzle, which not only increases the flow rate of oxygen, but also enables the supersonic oxygen to stir the molten steel in the furnace more evenly when spraying out, improving the efficiency of the steelmaking reaction.

[0031] The function of the first reinforcing rib 4 is to stably strengthen the central end face 7 of the nozzle, greatly improving the strength and compressive capacity of the nozzle.

[0032] The thickness of the first reinforcing rib 4 is set to be the same as the thickness of the central end face 7 of the nozzle.

[0033] As Figure 1 described, the second reinforcing rib group 5 includes two second reinforcing ribs 51 arranged symmetrically, and the two second reinforcing ribs 51 are both located between two adjacent oxygen channels 8.

[0034] In this embodiment, the second reinforcing rib 51 is fixedly connected between the front end 1 and the rear end 3 of the nozzle by welding.

[0035] The function of the second reinforcing rib 51 is to support the front end 1 and the rear end 3 of the nozzle, and can reduce the force exerted on the oxygen channel 8.

[0036] For those of ordinary skill in the art, according to the teachings of the present invention, without departing from the principles and spirit of the present invention, the changes, modifications, substitutions and deformations made to the embodiments still fall within the protection scope of the present invention.

Claims

1. A forging oxygen lance nozzle, including the front end (1) of the nozzle, characterized in that: One end face of the front end (1) of the nozzle is fixedly installed with a water distribution plate (2), the other end of the water distribution plate (2) is fixedly installed with the rear end (3) of the nozzle, a nozzle center end face (7) is arranged at the middle position of the side of the front end (1) of the nozzle away from the water distribution plate (2), a bump (6) is arranged at the middle position of the side of the front end (1) of the nozzle close to the water distribution plate (2), and a plurality of oxygen channels (8) are annularly arranged around the bump (6) on the side of the front end (1) of the nozzle close to the water distribution plate (2). A first reinforcing rib (4) is fixedly connected between each oxygen channel (8) and the bump (6). A plurality of second reinforcing rib groups (5) are annularly arranged between the front end (1) and the rear end (3) of the nozzle and close to the edge position of the front end (1) of the nozzle. Each group of second reinforcing rib groups (5) is located between two adjacent oxygen channels (8).

2. The forging oxygen lance nozzle according to claim 1, characterized in that: The front end (1) of the nozzle, the water distribution plate (2) and the rear end (3) of the nozzle are all forged from pure copper material.

3. The forging oxygen lance nozzle according to claim 2, characterized in that: The connection modes between the front end (1) of the nozzle, the water distribution plate (2) and the rear end (3) of the nozzle are respectively fixed by welding.

4. The forging oxygen lance nozzle according to claim 3, characterized in that: The thickness of the first reinforcing rib (4) is set to be the same as the thickness of the nozzle center end face (7).

5. The forging oxygen lance nozzle according to claim 4, characterized in that: The second reinforcing rib group (5) includes two second reinforcing ribs (51) arranged symmetrically.

6. The forging oxygen lance nozzle according to claim 5, characterized in that: The two second reinforcing ribs (51) are both located between two adjacent oxygen channels (8).

7. The forging oxygen lance nozzle according to claim 6, characterized in that: The second reinforcing rib (51) is fixedly connected between the front end (1) and the rear end (3) of the nozzle by welding.

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