Five-hole oxygen lance for converter

Abstract

The utility model relates to the technical field of converter oxygen lances, in particular to a five-hole oxygen lance for a converter, which comprises a lance tail, a lance body and a five-hole nozzle which are sequentially connected, a main oxygen channel penetrates through the five-hole nozzle and is communicated with an oxygen channel in the lance body, and a main oxygen outlet is arranged on one side of the main oxygen channel far away from the lance body. Four branch oxygen channels are formed in the main oxygen channel through diversion ports, each branch oxygen channel extends to the side far away from the gun body and is provided with a branch oxygen outlet, the main oxygen outlet and the branch oxygen outlets are arranged in an external expansion mode, and the four branch oxygen outlets are annularly distributed in one side of the main oxygen outlet. According to the oxygen lance, a plurality of branch oxygen channels are formed in the main oxygen channel to form an external diffusion type five-hole nozzle, so that uniform distribution and efficient diffusion of oxygen injection can be realized, the effective oxygen blowing range of the oxygen lance is enlarged, the contact area and mixing efficiency of molten steel and oxygen are increased, and the molten steel smelting effect of a converter is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of converter oxygen lances, in particular to a five-hole oxygen lance for converters. Background Art

[0002] The converter oxygen lance is one of the key equipment in oxygen converter steelmaking. Its main function is to blow high-pressure and high-purity oxygen into the metal molten pool above the converter at supersonic speed to promote the oxidation of molten steel and the stirring of the molten pool. Its performance characteristics directly affect the smelting effect and the quality of steel.

[0003] The oxygen lance mainly consists of three parts: the lance body, the nozzle and the lance tail. Each part undertakes an indispensable function and mission. Among them, as the direct discharge end of oxygen, the spraying effect of the nozzle is very important for the oxygen lance. Therefore, the utility model proposes a five-hole oxygen lance for converters. Summary of the Utility Model

[0004] In order to solve the above technical problems, the utility model provides a five-hole oxygen lance for converters. By opening a plurality of sub-oxygen channels in the main oxygen channel to form an outer-diffusion five-hole nozzle, the effective oxygen blowing range of the oxygen lance can be increased, the contact area and mixing efficiency between molten steel and oxygen can be enhanced, and the smelting effect of converter molten steel can be improved.

[0005] The five-hole oxygen lance in this solution includes a lance tail, a lance body and a five-hole nozzle connected in sequence. The five-hole nozzle is penetrated by a main oxygen channel that communicates with the oxygen channel in the lance body. A main oxygen outlet is provided on the side of the main oxygen channel away from the lance body. Four sub-oxygen channels are opened in the main oxygen channel through a shunt port. Each sub-oxygen channel extends to the side away from the lance body and is provided with a sub-oxygen outlet. Among them, the main oxygen outlet and the sub-oxygen outlets are both outwardly expanded, and the four sub-oxygen outlets are annularly distributed on one side of the main oxygen outlet.

[0006] The technical solution further defined by the utility model is:

[0007] Further, the angle α between the center line of the main oxygen outlet and the center line of each sub-oxygen outlet is 30-45°.

[0008] Further, an inlet water channel and an outlet water channel that are connected and communicated are opened in the five-hole nozzle, and the sides of both of them close to the lance body are respectively communicated with the cooling water channel in the lance body.

[0009] Further, the lance body is conical.

[0010] Further, the lance tail includes a mounting flange and an oxygen pipe, a cooling water inlet elbow and a cooling water outlet elbow connected thereto.

[0011] The beneficial effects of the present utility model are as follows: By arranging a plurality of sub-oxygen channels in the main oxygen channel, a five-hole nozzle with an external diffusion type is formed, which can achieve uniform distribution and efficient diffusion of oxygen injection, increase the effective oxygen blowing range of the oxygen lance, enhance the contact area and mixing efficiency between molten steel and oxygen, and improve the smelting effect of converter molten steel. In addition, the outer part of the lance body provided by the present utility model is conical, and the sloping surface is not easy to retain steel slag, effectively reducing the adhesion and accumulation of steel slag on the lance body surface, so that the lance body surface has a certain anti-sticking effect. In addition, the conical lance body design increases the water content of the cooling water inside this area, improves the cooling effect of the lance body, and extends the service life of the oxygen lance. Description of the Drawings

[0012] Figure 1 It is a schematic structural diagram of a five-hole oxygen lance for a converter in an embodiment of the present utility model;

[0013] Figure 2 It is a structural sectional view of a five-hole nozzle in an embodiment of the present utility model;

[0014] Figure 3 It is a schematic bottom view of a five-hole nozzle in an embodiment of the present utility model;

[0015] Figure 4 It is an effect diagram when the five-hole nozzle blows oxygen in an embodiment of the present utility model;

[0016] Among them: 10, lance body; 20, five-hole nozzle; 30, lance tail; 201, main oxygen channel; 202, main oxygen outlet; 203, shunt port; 204, sub-oxygen channel; 205, sub-oxygen outlet; 206, water inlet channel; 207, water outlet channel. Detailed Embodiment

[0017] As Figure 1 shown, the five-hole oxygen lance for a converter provided in this embodiment includes a lance tail 30, a lance body 10 and a five-hole nozzle 20 that are sequentially connected from top to bottom. The lance body 10 is integrally conical, and the external design of the cone has a certain slope, which can reduce the residue of surface steel slag. The lance tail 30 includes a mounting flange and an oxygen pipe, a cooling water inlet elbow and a cooling water outlet elbow connected thereto. The oxygen pipe is used to supply oxygen to the lance body 10 and the five-hole nozzle 20, and the cooling water inlet elbow and the cooling water outlet elbow are respectively used for the inlet and outlet of the lance body cooling water.

[0018] In this embodiment, referring to Figure 2 , a main oxygen channel 201 penetrates through the five-hole nozzle 20 and communicates with the oxygen channel inside the lance body 10, and a main oxygen outlet 202 is provided on the side of the main oxygen channel 201 away from the lance body 10. Four sub-oxygen channels 204 are provided in the main oxygen channel 201 through a shunt port 203, and sub-oxygen outlets 205 are provided on the side where each sub-oxygen channel 204 extends away from the lance body 10. As Figure 3As shown, both the main oxygen outlet 202 and the sub-oxygen outlets 205 are outwardly expanded. The orientations of the main oxygen outlet 202 and the sub-oxygen outlets 205 are away from each other to cover a larger oxygen blowing area. Moreover, the four sub-oxygen outlets 205 are annularly distributed on one side of the main oxygen outlet 202. Meanwhile, a water inlet channel 206 and a water outlet channel 207 that are connected and communicated are provided inside the five-hole nozzle 20, and the sides of both of them close to the gun body 10 are respectively communicated to the cooling water channels inside the gun body 10.

[0019] As Figure 4 shown, in some specific embodiments, the angle between the center line of the main oxygen outlet 202 and the center lines of the respective sub-oxygen outlets 205 is α = 30 - 45°, enabling the main oxygen outlet 202 and the four sub-oxygen outlets 205 to each diffuse outward, increasing the effective oxygen blowing range of the five-hole nozzle 20 in the converter.

[0020] It should be noted that the gun body 10 has inlet and outlet cooling water channels and an oxygen channel inside. One end of the inlet and outlet cooling water channels is respectively communicated with the cooling water inlet elbow and the cooling water outlet elbow at the gun tail 30, and the other end is communicated with the water inlet channel 206 and the water outlet channel 207 of the five-hole nozzle 20. The oxygen channel inside the gun body 10 is respectively communicated with the oxygen pipe at the gun tail 30 and the main oxygen channel 201 of the five-hole nozzle 20. The layout of the water channels and channels inside the gun body 10 of the oxygen lance can be adjusted according to the actual situation, so it will not be elaborated here. However, it is worth noting that due to the tapered design of the gun body 10, this area has a larger accommodation space compared with a straight gun body inside, so the cooling water channel in this tapered area has a larger cross-sectional area, can pass more cold water, and has a better heat exchange effect.

[0021] Except for 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 five-hole oxygen lance for a converter, comprising a lance tail (30), a lance body (10) and a five-hole nozzle (20) connected in sequence, wherein the five-hole nozzle (20) is penetrated by a main oxygen channel (201) connected to the oxygen channel in the lance body (10), and a main oxygen outlet (202) is provided on the side of the main oxygen channel (201) away from the lance body (10), characterized in that: Four oxygen distribution channels (204) are provided in the main oxygen channel (201) through the diversion port (203), and each oxygen distribution channel (204) is provided with an oxygen distribution outlet (205) extending to a side away from the gun body (10), wherein the main oxygen outlet (202) and the oxygen distribution outlet (205) are both arranged to expand outwards, and the four oxygen distribution outlets (205) are distributed in a ring shape on one side of the main oxygen outlet (202).

2. The five-hole oxygen lance for converter according to claim 1, characterized in that: The angle α between the center line of the main oxygen outlet (202) and the center line of each of the oxygen outlets (205) is 30-45°.

3. The five-hole oxygen lance for converter according to claim 1, characterized in that: The five-hole nozzle (20) is provided with a water inlet channel (206) and a water outlet channel (207) which are connected to each other, and the sides of the two channels close to the gun body (10) are respectively connected to cooling water channels in the gun body (10).

4. The five-hole oxygen lance for converter according to claim 1, characterized in that: The gun body (10) is tapered.

5. The five-hole oxygen lance for converter according to claim 1, characterized in that: The gun tail (30) comprises a mounting flange and an oxygen pipe, a cooling water inlet elbow and a cooling water outlet elbow connected thereto.

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