A strong mixing type oxygen lance device for a non-ferrous copper side-blown converter

Abstract

The utility model belongs to oxygen lance technical field especially relates to a strong mixed type oxygen lance device for nonferrous copper side-blown converter, its characterized in be equipped with pre-mixing cavity between oxygen inlet and compressed air inlet in gun body, and the outlet side of gun body is equipped with mixing cone, and the mixing cone is connected with the inner wall of gun body through the rib plate, and the outer surface of mixing cone is evenly provided with a plurality of helical blades along the circumferential direction, and the inner nozzle is connected with the front side of gun body, and the oxygen inlet is connected to the rear side of gun body. The utility model has the advantages that: by setting pre-mixing cavity, and setting mixing cone at the outlet, the mixing of oxygen and compressed air is more sufficient, so that the combustion effect in side-blown converter is more stable; the gun body made of ceramic sintering part can avoid the adverse effect of the violent mixing of oxygen and compressed air on the surface quality of gun body.

Description

Technical Field

[0001] This utility model belongs to the field of oxygen lance technology, and in particular relates to an oxygen lance device for a strongly mixed non-ferrous copper side-blown furnace. Background Technology

[0002] Side-blown smelting is used in copper-nickel smelting processes to treat matte (metallic sulfides) in non-ferrous metallurgical production. Its main characteristic is that it requires no fuel; the heat generated solely by the oxidation reaction of iron and sulfur in the molten copper provides all the heat output. However, it requires additional oxygen-enriched air to enhance the oxidation reaction. Side-blown smelting is highly adaptable to different raw materials. In recent years, this technology has been applied to the co-processing of primary copper mines, the treatment of non-ferrous metal smelting waste, and the resource recovery and harmless disposal of solid waste. Two commonly used side-blown smelting methods in my country are oxygen-enriched side-blown molten pool smelting and side-blown submerged combustion molten pool smelting.

[0003] Oxygen-enriched side-blown smelting is a highly efficient smelting process independently developed in my country based on the Vanyukov smelting method. This technology improves the thermal efficiency and metal recovery rate of the smelting process by side-blowing oxygen-enriched air. In this process, multi-channel side-blowing lances are installed on the side wall of the smelting furnace, and the lances directly inject oxygen-enriched air and fuel into the molten pool at subsonic speeds. This method does not rely on the heating of the raw materials, but can directly provide heat to the melt through the combustion process, making it suitable for a variety of non-heat-generating materials. Side-blowing allows for rapid immersion of materials in the molten pool and promotes the completion of chemical reactions, effectively improving smelting efficiency and overall metal recovery rate. Operationally, the side-blown smelting process does not require strict raw material pretreatment; the moisture content of the raw materials entering the furnace is low, and they can be directly fed through an automated system, simplifying the material handling process. During the smelting process, operators can precisely control the smelting temperature by adjusting the oxygen and fuel supply of the lances, thereby ensuring operational safety.

[0004] Chinese utility model patent application number 202122560860.9 discloses an oxygen lance for a side-blown furnace and a side-blown furnace equipped with it. The oxygen lance includes a nozzle and an oxygen lance. The nozzle has an air duct running through its front and rear ends, and the rear end of the nozzle is connected to the oxygen lance. The oxygen lance includes a front pipe at the front end, a rear pipe at the rear end, and a flange at the rear end of the front pipe. The front pipe and the rear pipe are connected, with the front pipe extending through the air duct towards the front end of the nozzle, and the flange connected to the rear end of the nozzle. The rear pipe includes a first medium channel, a second medium channel, and a tail channel, with a sealing element installed in the tail channel. In existing side-blown furnace oxygen lances, oxygen and air each enter through a separate branch pipe. After mixing, the oxygen and air form oxygen-enriched air, which is then sent into the side-blown converter to complete the combustion process. Currently, the mixing effect of oxygen and compressed air is poor. Due to the short length of the oxygen lance, there is insufficient mixing space and time, resulting in poor mixing and unstable combustion within the furnace. Further optimization is urgently needed. Utility Model Content

[0005] The purpose of this invention is to provide an oxygen lance device for a strongly mixed non-ferrous copper side-blown furnace, which overcomes the shortcomings of the prior art. By setting a premixing chamber at the oxygen and compressed air mixing point and a mixing cone at the outlet, the two gases, oxygen and compressed air, are further mixed under accelerated conditions, resulting in a more thorough mixing effect, maintaining a stable concentration of oxygen-enriched air, and ensuring a more stable combustion effect in the furnace.

[0006] To achieve the above objectives, this utility model employs the following technical solution:

[0007] An oxygen lance device for a strong mixing type non-ferrous copper side-blown furnace includes an in-furnace nozzle and a lance body. The lance body is provided with an oxygen inlet and a compressed air inlet. A premixing chamber is provided between the oxygen inlet and the compressed air inlet inside the lance body. A mixing cone is provided on the outlet side of the lance body. The mixing cone is connected to the inner wall of the lance body through a rib. A number of spiral blades are evenly provided on the outer surface of the mixing cone along the circumferential direction. The in-furnace nozzle is connected to the front side of the lance body, and the oxygen inlet is connected to the rear side of the lance body.

[0008] Furthermore, the diameter ratio of the oxygen inlet to the compressed air inlet is 1:1.1-1.5.

[0009] Furthermore, the compressed air inlet is positioned perpendicular to the axis of the oxygen inlet.

[0010] Furthermore, the gun body is a sintered ceramic component.

[0011] Furthermore, the height of the spiral blade is consistent with the gap distance between the gun body and the mixing cone.

[0012] Furthermore, the front end of the nozzle inside the furnace is provided with a narrowing band, and the outer side of the narrowing band is a flared mouth.

[0013] Furthermore, the ratio of the diameter d of the reduced diameter band to the inner diameter D of the nozzle in the furnace on the front side of the reduced diameter band is 1:1.2-1.5.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1) By setting a premixing chamber at the oxygen and compressed air mixing point and a mixing cone at the outlet, the two gases, oxygen and compressed air, are further mixed under accelerated conditions, resulting in a more thorough mixing effect and a stable concentration of oxygen-enriched air, thereby ensuring a more stable combustion effect in the side-blown converter.

[0016] 2) The gun body is made of ceramic sintered parts, which has high surface hardness. This can avoid the adverse effects of the intense mixing of oxygen and compressed air on the surface quality of the gun body and prevent impurities from damaging the gun body itself. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0018] Figure 2 yes Figure 1 External three-dimensional view;

[0019] Figure 3 This is a schematic diagram of the gun body structure in an embodiment of this utility model;

[0020] Figure 4 yes Figure 3 The right view.

[0021] In the diagram: 1-furnace nozzle, 2-gun body, 3-oxygen inlet, 4-compressed air inlet, 5-flare mouth, 6-premixing chamber, 7-mixing cone, 8-rib plate, 9-spiral blade, 10-reduction zone. Detailed Implementation

[0022] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0023] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the specific embodiments used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the specific embodiments described below are some embodiments of this utility model. For those skilled in the art, other specific embodiments can be obtained based on these specific embodiments without creative effort.

[0024] The components of the present invention described and shown in the specific embodiments herein can be arranged and designed in numerous different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the specific embodiments is not intended to limit the scope of the claimed invention, but only to illustrate selected embodiments of the invention.

[0025] See Figure 1-4This is a schematic diagram of an embodiment of an oxygen lance device for a side-blown non-ferrous copper furnace with strong mixing according to this utility model. It includes an in-furnace nozzle 1 and a lance body 2. The lance body 2 is provided with an oxygen inlet 3 and a compressed air inlet 4, with the compressed air inlet 4 positioned perpendicular to the axis of the oxygen inlet 3. A premixing chamber 6 is provided between the oxygen inlet 3 and the compressed air inlet 4 within the lance body 2, where oxygen and compressed air undergo initial mixing. A mixing cone 7 is provided on the outlet side of the lance body 2, connected to the inner wall of the lance body 2 via ribs 8. Several spiral blades 9 are evenly distributed along the circumference of the outer surface of the mixing cone 7. The in-furnace nozzle 1 is connected to the front side of the lance body 2, and the oxygen inlet 3 is connected to the rear side of the lance body 2. The height of the spiral blades 9 is consistent with the gap distance between the lance body 2 and the mixing cone 7. The mixed airflow of oxygen and compressed air accelerates between the spiral blades 9, forming a spiral jet pattern, which facilitates further mixing within the in-furnace nozzle 1.

[0026] The diameter ratio of oxygen inlet 3 to compressed air inlet 4 is 1:1.1-1.5, with a preferred value of 1:1.2, which is beneficial for better control of the ratio of oxygen to compressed air.

[0027] The front end of the furnace nozzle 1 is provided with a narrowing band 10, and the outer side of the narrowing band is a bell mouth 5. The ratio of the diameter d of the narrowing band to the inner diameter D of the furnace nozzle 1 on the front side of the narrowing band is 1:1.2-1.5, with a preferred value of 1:1.3. The function of the narrowing band 10 is to increase the flow velocity of the mixed gas, which can enhance the mixing effect and also facilitate the spraying of oxygen-enriched air to a farther place in the side-blown converter, resulting in a better blowing effect.

[0028] In this invention, the gun body 2 is a ceramic sintered part, such as alumina ceramic or silicon nitride ceramic, which can achieve high strength, high temperature resistance, lower manufacturing cost, smaller size and lighter weight while ensuring the realization of complex internal structure.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An oxygen lance device for a strongly mixed non-ferrous copper side-blown furnace, characterized in that, The device includes an in-furnace nozzle and a gun body. The gun body is provided with an oxygen inlet and a compressed air inlet. A premixing chamber is provided between the oxygen inlet and the compressed air inlet inside the gun body. A mixing cone is provided on the outlet side of the gun body. The mixing cone is connected to the inner wall of the gun body through a rib. Several spiral blades are evenly provided on the outer surface of the mixing cone along the circumferential direction. The in-furnace nozzle is connected to the front side of the gun body, and the oxygen inlet is connected to the rear side of the gun body.

2. The oxygen lance device for a strongly mixed non-ferrous copper side-blown furnace according to claim 1, characterized in that, The diameter ratio of the oxygen inlet to the compressed air inlet is 1:1.1-1.

5.

3. The oxygen lance device for a strongly mixed non-ferrous copper side-blown furnace according to claim 1, characterized in that, The compressed air inlet is positioned perpendicular to the axis of the oxygen inlet.

4. The oxygen lance device for a strongly mixed non-ferrous copper side-blown furnace according to claim 1, characterized in that, The gun body is a sintered ceramic component.

5. The oxygen lance device for a strongly mixed non-ferrous copper side-blown furnace according to claim 1, characterized in that, The height of the spiral blades is consistent with the gap distance between the gun body and the mixing cone.

6. The oxygen lance device for a strongly mixed non-ferrous copper side-blown furnace according to claim 1, characterized in that, The front end of the nozzle inside the furnace is provided with a narrowing band, and the outer side of the narrowing band is a flared mouth.

7. The oxygen lance device for a strongly mixed non-ferrous copper side-blown furnace according to claim 6, characterized in that, The ratio of the diameter d of the reduced diameter band to the inner diameter D of the nozzle in the furnace on the front side of the reduced diameter band is 1:1.2-1.5.

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