Spindle-shaped converter oxygen lance body

Abstract

The utility model relates to the technical field of converter oxygen lances, in particular to a spindle-shaped converter oxygen lance body which comprises a lance body composed of an outer sleeve, a middle sleeve and an oxygen sleeve which are sequentially connected from outside to inside, an annular circumferential protruding part is arranged outside the outer sleeve, so that the lance body is spindle-shaped, a water inlet channel is formed by a gap between the outer sleeve and the middle sleeve, and a water outlet channel is formed in the middle sleeve. A gap between the middle sleeve and the oxygen sleeve forms a water outlet channel, and the water inlet channel is communicated with the water outlet channel, so that external cooling water enters from the water inlet channel and is discharged from the water outlet channel. The fusiform gun body is designed, the outer surface and the inner surface of the gun body of the outer sleeve are both arc-shaped curved surfaces, the outer surface of the gun body has a certain gradient so that slag and molten steel can fall off more easily under the action of gravity, and compared with a cylindrical gun body, the inner surface of the gun body has a larger contact area with cooling water, so that the cooling water is cooled more easily. Meanwhile, the area located in the water inlet channel can contain more water, the heat exchange effect is better, and cooling of the gun body is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of converter oxygen lances, in particular to a spindle-shaped converter oxygen lance body. Background Art

[0002] During the converter steelmaking process, high-pressure oxygen is converted into a supersonic jet through a water-cooled oxygen lance and sprayed into the metal bath to complete decarburization, removal of impurities such as silicon and phosphorus, and bath temperature increase. The supersonic jet stirs the bath, promoting temperature and composition homogenization. The jet impact velocity causes metal droplets to splash onto the oxygen lance, resulting in gun sticking and burning, thereby shortening the service life of the oxygen lance and even causing safety accidents. Deeply understanding the supersonic jet behavior and its dynamic characteristics under different design and operating conditions is of practical significance for optimizing oxygen lance design and guiding converter operation.

[0003] Based on this, the present application proposes a spindle-shaped converter oxygen lance body to solve the problem of molten steel or slag sticking to the lance body. Summary of the Utility Model

[0004] To solve the above technical problems, the utility model provides a spindle-shaped converter oxygen lance body, which adopts a spindle shape design, reducing the probability and force of slag sticking to the outer surface of the lance body and reducing the slag sticking probability.

[0005] The spindle-shaped converter oxygen lance body proposed in the present application includes a lance body composed of an outer sleeve, a middle sleeve, and an oxygen sleeve connected in sequence from outside to inside. A circumferential convex portion is provided on the outside of the outer sleeve, making the lance body spindle-shaped. The gap between the outer sleeve and the middle sleeve forms an inlet water channel, and the gap between the middle sleeve and the oxygen sleeve forms an outlet water channel. The inlet water channel is communicated with the outlet water channel to enable external cooling water to enter through the inlet water channel and be discharged through the outlet water channel.

[0006] The further limited technical solution of the utility model is:

[0007] Further, the circumferential convex portion is located in the middle of the lance body.

[0008] Further, an oxygen channel is provided inside the oxygen sleeve.

[0009] Further, a quick connection mechanism and a nozzle are respectively connected to the upper and lower parts of the lance body. An inlet water pipe, an outlet water pipe, and an oxygen inlet pipe are provided on the quick connection mechanism, which are respectively communicated with the inlet water channel, the outlet water channel, and the oxygen sleeve.

[0010] Further, a booster pump is installed on the inlet water pipe and / or the outlet water pipe.

[0011] Further, the inlet water channel and the outlet water channel are communicated through a water passing channel on the middle sleeve, and the water passing channel is located at the lower end of the middle sleeve.

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

[0013] (1) The present invention adopts a spindle shape design, which reduces the probability and force of slag adhesion on the outer surface of the lance body. Due to the action of gravity during the production process, the adhered slag is more likely to fall off the lance body by itself. Because the lance body has a certain slope, the adhesion force after adhesion decreases, reducing the probability of slag adhesion;

[0014] (2) Through the spindle-shaped lance body design of the present utility model, the amount of cooling water at a lower temperature can be increased. The amount of water in the middle area of the water inlet channel increases, and the contact area between the inner surface of the lance body and the cooling water is also increased. The cooling effect of the lance body is enhanced, and the probability of the slag falling off by itself after sticking to the lance increases. The probability and force of the lance body being adhered are greatly reduced;

[0015] (3) The present utility model improves the water flow rate at the water outlet through a booster pump, further enhancing the cooling effect of the oxygen lance body. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of the spindle-shaped converter oxygen lance body in the embodiment of the present utility model;

[0017] Figure 2 It is a structural sectional view of the lance body in the embodiment of the present utility model;

[0018] Figure 3 It is a schematic diagram of the contact surface when the lance body is cooled in the embodiment of the present utility model;

[0019] Among them: 10. Outer sleeve; 20. Middle sleeve; 30. Oxygen sleeve; 40. Sprayer; 50. Quick connection mechanism;

[0020] 1011. Circumferential convex part; 1012. Outer surface of the lance body; 1013. Inner surface of the lance body; 1020. Water inlet channel; 2030. Water outlet channel; 3001. Oxygen channel; 5001. Booster pump. Detailed Embodiment

[0021] As Figure 1 shown, the spindle-shaped converter oxygen lance body provided in this embodiment is sequentially connected with a quick connection mechanism 50, a lance body, and a sprayer 40 from top to bottom. An inlet pipe, an outlet pipe, and an oxygen inlet pipe are provided on the quick connection mechanism 50 and are respectively connected to the inside of the lance body. Specifically, a booster pump 5001 is also installed on the outlet pipe to increase the flow rate of the cooling water.

[0022] See Figure 2, which is a schematic structural diagram of the gun body in this embodiment, is specifically composed of an outer sleeve 10, a middle sleeve 20, and an oxygen sleeve 30 connected in sequence from outside to inside. A circumferential convex portion 1011 is provided outside the outer sleeve 10, making the overall gun body spindle-shaped. The gap between the outer sleeve 10 and the middle sleeve 20 forms an inlet water channel 1020, and the gap between the middle sleeve 20 and the oxygen sleeve 30 forms an outlet water channel 2030, so that external cooling water enters downward from the inlet water channel 1020 and is discharged upward through the outlet water channel 2030. An oxygen channel 3001 is opened in the middle of the oxygen sleeve 30 to supply oxygen to the nozzle 40.

[0023] It should be noted that the inlet water channel 1020 and the outlet water channel 2030 in this embodiment are connected through a water passing channel opened at the lower end of the middle sleeve 20. In some other embodiments, the inlet water channel 1020 and the outlet water channel 2030 can also be connected through the nozzle 40. Specifically, a flow channel is opened in the nozzle 40 to connect the inlet water channel 1020 and the outlet water channel 2030, and at the same time, the nozzle 40 can be cooled.

[0024] As Figure 3 shown, in this embodiment, due to the spindle-shaped gun body formed by the design of the circumferential convex portion 1011, both the outer surface 1012 and the inner surface 1013 of the gun body of the outer sleeve 10 are arc-shaped curved surfaces. The outer surface 1012 of the gun body has a certain slope, and slag and molten steel are more likely to fall under the action of gravity. Secondly, compared with a cylindrical gun body, the inner surface 1013 of the gun body has a larger contact area with the cooling water. At the same time, this area located in the inlet water channel 1020 can accommodate more water volume, and the heat exchange effect is better, which is beneficial to the cooling of the gun body.

[0025] On the other hand, the circumferential convex portion 1011 in this application is located in the lower-middle area of the gun body. Specifically, in some other embodiments, the circumferential convex portion 1011 can also be located in the middle or upper-middle area of the gun body. As long as the outer sleeve 10 forms a quasi-spindle shape, the effect of improving the cooling of the gun body can be achieved, and the problem of molten steel or slag sticking to the gun body can be solved. The solution provided by this application has a simple structure and ingenious design. Through this design, the probability of the gun body sticking can be greatly reduced.

[0026] In addition to the above embodiments, the present utility model can also have other embodiments; all technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope required by the present utility model.

Claims

1. A spindle-shaped converter oxygen lance body, comprising an outer sleeve (10), a middle sleeve (20) and an oxygen sleeve (30) connected in sequence from outside to inside, characterized in that: The outer sleeve (10) is provided with an annular circumferential protrusion (1011) on the outside, so that the gun body is spindle-shaped. The gap between the outer sleeve (10) and the middle sleeve (20) constitutes a water inlet channel (1020), and the gap between the middle sleeve (20) and the oxygen sleeve (30) constitutes a water outlet channel (2030). The water inlet channel (1020) is connected to the water outlet channel (2030), so that external cooling water enters through the water inlet channel (1020) and is discharged through the water outlet channel (2030).

2. The spindle-shaped converter oxygen lance body according to claim 1, characterized in that: The circumferential protrusion (1011) is located in the middle of the gun body.

3. The spindle-shaped converter oxygen lance body according to claim 1, characterized in that: An oxygen channel (3001) is provided in the oxygen sleeve (30).

4. The spindle-shaped converter oxygen lance body according to claim 1, characterized in that: The upper and lower parts of the gun body are respectively connected with a quick connection mechanism (50) and a nozzle (40); the quick connection mechanism (50) is provided with a water inlet pipe, a water outlet pipe and an oxygen inlet pipe, which are respectively connected with the water inlet channel (1020), the water outlet channel (2030) and the oxygen sleeve (30).

5. The spindle-shaped converter oxygen lance body according to claim 4, characterized in that: A booster pump (5001) is installed on the water inlet pipe and / or the water outlet pipe.

6. The spindle-shaped converter oxygen lance body according to claim 1, characterized in that: The water inlet channel (1020) and the water outlet channel (2030) are connected via a water passage on the middle sleeve (20), and the water passage is located at the lower end of the middle sleeve (20).

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