Copper and steel combined forging oxygen lance nozzle

Abstract

The utility model relates to the technical field of steel and iron smelting, in particular to a copper and steel combined forging oxygen lance nozzle which comprises a nozzle crown, an oxygen disc, an oxygen column, a water guide plate, a nozzle inner pipe, a nozzle middle pipe and a nozzle outer pipe. The joint is sealed by a high-temperature-resistant sealing ring; the other end of the oxygen column and the oxygen disc are welded together through electric welding, the spray head inner pipe and the oxygen disc are welded together through argon arc welding, the spray head middle pipe is connected with the water guide plate through threads, and the spray head outer pipe and the spray head crown are welded together through argon arc welding. The nozzle crown in contact with flames is formed by forging and pressing high-purity red copper materials, the purity is high, the density is high, the metallographic structure is compact, the heat conduction performance is good, the oxygen hole corrosion speed is low, the service life of the nozzle is long, the performance is stable, the oxygen disc, the oxygen column and the water guide plate which are not in contact with the flames are made of steel materials, and the cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of steel smelting, in particular to a copper-steel combined forging oxygen lance nozzle. Background Art

[0002] The oxygen lance is an important oxygen blowing equipment in converter steelmaking. The oxygen lance nozzle is the most important component of the converter oxygen lance. The production and manufacturing processes of the oxygen lance nozzle mainly include casting process and forging assembly process.

[0003] The advantages of oxygen lance nozzles manufactured through casting are their rational structure, the ability to cast any complex shape, and low production costs, making them suitable for mass production. However, their disadvantages are low purity, low density, and poor thermal conductivity. Defects such as porosity, looseness, and cracks in the copper produced during the casting process shorten their service life. Rapid corrosion occurs at the oxygen orifice outlet, affecting the oxygen lance's blowing efficiency. Oxygen lance nozzles manufactured through forging and assembly processes overcome these issues, while also offering advantages such as dense material, high purity, excellent thermal conductivity, and a longer nozzle life.

[0004] However, due to the high cost of pure copper, the pure copper oxygen lance nozzle made by forging and assembly technology has high production cost and a relatively complicated production process, making it difficult to promote and apply. Utility Model Content

[0005] The purpose of the utility model is to provide a copper-steel combined forged oxygen lance nozzle, so as to improve the manufacturing process of the oxygen lance nozzle and save the manufacturing cost of the oxygen lance nozzle.

[0006] The technical solution adopted is: a copper-steel combined forged oxygen lance nozzle, comprising: a nozzle outer tube and a nozzle crown fixed to the nozzle outer tube by argon arc welding, wherein the end surface of the nozzle crown is provided with a plurality of first oxygen nozzles, each of which extends inwardly to form a first oxygen expansion section;

[0007] Located inside the nozzle outer tube is the nozzle inner tube and an oxygen disk fixed to the nozzle by argon arc welding. The end surface of the oxygen disk is provided with the same number of second oxygen nozzles as the nozzle crown. Each second oxygen nozzle extends outward to form a second oxygen expansion section.

[0008] An oxygen column is provided between the first oxygen expansion section and the second oxygen expansion section. The oxygen column is fixed to the first oxygen expansion section by threaded connection, and the oxygen column is fixed to the second oxygen expansion section by welding.

[0009] A nozzle middle tube is provided between the nozzle outer tube and the nozzle inner tube. The end of the nozzle middle tube is fixedly connected to the water guide plate by a threaded connection. The end surface of the water guide plate is provided with a socket matching the outer wall of the oxygen column. The socket and the outer wall of the oxygen column are connected together by brazing. A water flow hole is provided in the middle of the end surface of the water guide plate.

[0010] Furthermore, the material of the nozzle crown is copper and is formed by forging;

[0011] Furthermore, the water guide plate, oxygen column and oxygen disk are all made of steel and are formed by forging and turning.

[0012] The beneficial effects of the utility model are:

[0013] 1. The nozzle crown of the oxygen lance nozzle provided by the utility model that contacts the flame is made of high-purity copper material by forging and pressing. It has high purity, high density, dense metallographic structure, good thermal conductivity, slow oxygen hole melting speed, long nozzle life and stable performance.

[0014] 2. The oxygen plate, oxygen column and water guide plate of the oxygen lance nozzle provided by the utility model, which are not in contact with the flame, are made of steel, which greatly reduces the cost.

[0015] 3. The oxygen column and the water guide plate are connected by threads, which is simple to operate and saves costs.

[0016] 4. The nozzle crown and the water guide plate are brazed, and the processing technology is simple. Since the oxygen column is an independent structure, the hole of the water guide plate and the oxygen column can fit more closely, so that the water cooling effect is improved and the service life of the nozzle is increased.

[0017] 5. The nozzle middle pipe and the water guide plate are connected by threads and then reinforced by electric welding to ensure that they do not fall off, and the nozzle has good safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A front sectional view of the structure of a copper-steel combined forged oxygen lance nozzle of the utility model;

[0019] Figure 2 A bottom view of the structure of a copper-steel combined forged oxygen lance nozzle in the utility model;

[0020] Among them: 1. Nozzle crown; 2. Water guide plate; 3. Oxygen column; 4. Nozzle outer tube; 5. Nozzle middle tube; 6. Oxygen disk; 7. Nozzle inner tube; 8. First oxygen expansion section; 9. Second oxygen expansion section; 10. First oxygen nozzle; 11. Second oxygen nozzle; 12. Socket; 13. Water hole. DETAILED DESCRIPTION

[0021] The following is a clear and complete description of the technical solutions adopted by the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0022] The utility model provides a copper-steel combined forged oxygen lance nozzle, such as Figure 1-2 As shown, it includes: a nozzle outer tube 4 and a nozzle crown 1 fixed to the nozzle outer tube 4 by argon arc welding. The end surface of the nozzle crown 1 is provided with a plurality of first oxygen nozzles 10, and each first oxygen nozzle 10 extends inward to form a first oxygen expansion section 8;

[0023] Furthermore, in this embodiment, the material of the nozzle crown 1 is copper and is formed by forging;

[0024] Located inside the nozzle outer tube 4 is the nozzle inner tube 7 and the oxygen disk 6 fixed to the nozzle inner tube 7 by argon arc welding. The end surface of the oxygen disk 6 is provided with the same number of second oxygen nozzles 11 as the nozzle crown 1. Each second oxygen nozzle 11 extends outward to form a second oxygen expansion section 9.

[0025] An oxygen column 3 is provided between the first oxygen expansion section 8 and the second oxygen expansion section 9. The oxygen column 3 is fixed to the first oxygen expansion section 8 by threaded connection, and the oxygen column 3 is fixed to the second oxygen expansion section 9 by welding.

[0026] A nozzle middle tube 5 is provided between the nozzle outer tube 4 and the nozzle inner tube 7. The end of the nozzle middle tube 5 is connected to the water guide plate 2 by a threaded connection. The end surface of the water guide plate 2 is provided with a socket 12 that matches the outer wall of the first oxygen expansion section 8. The socket 12 and the outer wall of the first oxygen expansion section 8 are connected together by brazing. A water flow hole 13 is provided in the middle of the end surface of the water guide plate 2.

[0027] Furthermore, the water guide plate 2, oxygen column 3, and oxygen disk 6 are all made of steel and are formed by forging and turning;

[0028] In addition, as a preferred technical solution, a high-temperature resistant sealing ring is used to seal the threaded connection between the oxygen column 3 and the nozzle crown 1 to improve the sealing between the oxygen column 3 and the nozzle crown 1.

[0029] Specifically, the oxygen passage of the copper-steel combined forged oxygen lance nozzle provided by the present invention is composed of a nozzle inner tube 7, an oxygen disk 6, an oxygen column 3, and a nozzle crown 1;

[0030] The nozzle middle tube 5 is used to introduce cooling water. The introduced cooling water flows into the interior of the nozzle crown 1 through the socket 12 and the water flow hole 13 on the end face of the water guide plate 2 to cool it, and is then discharged through the nozzle outer tube 4.

Claims

1. A copper-steel combined forged oxygen lance nozzle, characterized in that: include: A nozzle outer tube (4) and a nozzle crown (1) fixed to the nozzle outer tube (4) by argon arc welding, wherein the end surface of the nozzle crown (1) is provided with a plurality of first oxygen nozzles (10), and each first oxygen nozzle (10) extends inwardly to form a first oxygen expansion section (8); Located inside the nozzle outer tube (4) is a nozzle inner tube (7) and an oxygen disk (6) fixed to the nozzle inner tube (7) by argon arc welding. The end surface of the oxygen disk (6) is provided with the same number of second oxygen nozzles (11) as the nozzle crown (1). Each second oxygen nozzle (11) extends outward to form a second oxygen expansion section (9); An oxygen column (3) is provided between the first oxygen expansion section (8) and the second oxygen expansion section (9); the oxygen column (3) and the first oxygen expansion section (8) are fixed by thread connection, and the oxygen column (3) and the second oxygen expansion section (9) are fixed by welding; A nozzle middle tube (5) is provided between the nozzle outer tube (4) and the nozzle inner tube (7). The end of the nozzle middle tube (5) is connected and fixed to the water guide plate (2) by a threaded connection. The end surface of the water guide plate (2) is provided with a socket (12) matching the outer wall of the oxygen column (3). The socket (12) and the outer wall of the oxygen column (3) are connected together by brazing. A water flow hole (13) is provided in the middle of the end surface of the water guide plate (2).

2. The copper-steel combined forged oxygen lance nozzle according to claim 1, characterized in that: The material of the nozzle crown (1) is copper and is formed by forging.

3. The copper-steel combination forged oxygen lance nozzle according to claim 1, characterized in that: The water guide plate (2), oxygen column (3) and oxygen disk (6) are all made of steel and are formed by forging and turning.

4. The copper-steel combination forged oxygen lance nozzle according to claim 1, characterized in that: The threaded connection between the oxygen column (3) and the nozzle crown (1) is sealed with a high-temperature resistant sealing ring.

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