Oxygen lance for bottom-blown copper smelting furnace with spiral air duct

Abstract

This utility model discloses an oxygen lance for a bottom-blown copper smelting furnace with a spiral air duct, comprising an upper lance seat, a lower lance seat on one side of the upper lance seat, a first fixing groove on the side of the upper lance seat near the lower lance seat, into which an inner tube is inserted, and a second fixing groove in the middle of the side of the lower lance seat away from the upper lance seat, into which an outer tube is installed, the inner tube and the outer tube being coaxially arranged, and a plurality of spiral guide plates arranged in a matrix on the outer side of the end of the inner tube away from the upper lance seat, a first sealing ring being provided between the upper lance seat and the lower lance seat, the spiral angle of the spiral guide plates being not less than 15°. This oxygen lance has a simple structure and good sealing effect. Through the spiral flow channel, it effectively reduces the damage of the airflow to the furnace bottom and improves the service life of the furnace body.

Description

Technical Field

[0001] This utility model relates to the field of oxygen lance technology for smelting furnaces, and in particular to an oxygen lance for a bottom-blown copper smelting furnace with a spiral air duct. Background Technology

[0002] Bottom-blown copper smelting furnaces have become the mainstream technology in modern copper smelting due to their advantages such as high efficiency, energy saving, and environmental protection. The oxygen lance, as the core oxygen supply device of the bottom-blown furnace, directly affects the mixing efficiency of oxygen and the molten metal through its duct structure. Oxygen-enriched bottom-blown furnaces are mainly used in the copper and lead smelting industries. An oxygen lance is a key piece of equipment and a core technology of the bottom-blown furnace, as it is the device that injects gas into the molten pool through nozzles. The oxygen lance blows oxygen-enriched air into the molten pool through the oxygen lance at the bottom of the molten pool, creating a strong stirring environment. The oxygen lance area at the bottom of the existing reactor body is the most vulnerable part of the reactor body. When a high-speed gas jet is injected into the molten pool, the weak jet will form a bubble band at the tip of the oxygen lance, which will then strike and impact the furnace bottom at a certain frequency. This not only reduces the service life of the oxygen lance but also the service life of the furnace body. Therefore, we propose an oxygen lance for a bottom-blown copper smelting furnace with a spiral duct. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides an oxygen lance for a bottom-blown copper smelting furnace with a spiral air duct. This invention solves the problem that the oxygen lance area at the bottom of the existing reactor body is the most vulnerable part of the furnace. When a high-speed gas jet is injected into the molten pool, the weakly rigid jet forms a bubble band at the tip of the oxygen lance, which then strikes and impacts the furnace bottom at a certain frequency, reducing not only the lifespan of the oxygen lance but also the lifespan of the entire furnace.

[0004] This utility model discloses an oxygen lance for a bottom-blown copper smelting furnace with a spiral air duct, comprising an upper lance seat, a lower lance seat on one side of the upper lance seat, a first fixing groove on the side of the upper lance seat near the lower lance seat, an inner tube inserted into the first fixing groove, a second fixing groove in the middle of the side of the lower lance seat away from the upper lance seat, an outer tube in the second fixing groove, the inner tube and the outer tube being coaxially arranged, a plurality of spiral guide plates arranged in a matrix on the outer side of the end of the inner tube away from the upper lance seat, a first sealing ring between the upper lance seat and the lower lance seat, and the spiral angle of the spiral guide plates being not less than 15°.

[0005] In the above scheme, a second sealing ring is provided between the inner tube and the upper gun seat.

[0006] In the above scheme, a third sealing ring is provided between the outer tube and the lower gun seat.

[0007] In the above scheme, the upper gun base and the lower gun base are fixedly connected by bolts.

[0008] In the above scheme, both the upper gun holder and the lower gun holder are provided with connecting flanges.

[0009] In the above scheme, the end of the outer tube away from the upper gun seat is fixedly connected to the furnace body.

[0010] The advantages and beneficial effects of this utility model are as follows: This utility model provides an oxygen lance for a bottom-blown copper smelting furnace with a spiral air duct. Oxygen can enter between the inner tube 4 and the outer tube 6 through the lower lance seat 2. When the airflow passes through the spiral guide plate 7 at the end of the inner tube 4, it is vertically injected into the furnace body, forming a spiral columnar jet that flows into the molten pool. After the oxygen forms a spiral columnar jet, it breaks at the top of the gas jet to form a stable bubble band, thereby avoiding the "bubble backsinking" phenomenon at the bottom of the furnace body, thus extending the life of the oxygen lance and the furnace body. At the same time, it reduces molten splashing. The setting of multiple sealing rings effectively ensures the overall sealing performance of the oxygen lance spiral air duct. This type of oxygen lance has a simple structure and good sealing effect. Through the setting of the spiral flow channel, it effectively reduces the damage of the airflow to the furnace bottom and improves the service life of the furnace body. Attached Figure Description

[0011] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0012] Figure 1 This is a cross-sectional view of the present invention; Figure 2 This is a schematic diagram of the inner tube structure of this utility model; Figure 3 This is a schematic diagram of part A of the present invention.

[0013] In the diagram: 1. Upper gun mount; 2. Lower gun mount; 3. First fixing groove; 4. Inner tube; 5. Second fixing groove; 6. Outer tube; 7. Spiral guide plate; 8. First sealing ring; 9. Second sealing ring; 10. Third sealing ring; 11. Bolt; 12. Connecting flange. Detailed Implementation

[0014] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0015] like Figure 1-3As shown, this utility model is an oxygen lance for a bottom-blown copper smelting furnace with a spiral air duct, including an upper lance holder 1. A lower lance holder 2 is provided on one side of the upper lance holder 1. The upper lance holder 1 and the lower lance holder 2 allow the oxygen lance to be connected to compressed air and oxygen pipelines respectively. A first fixing groove 3 is provided on the side of the upper lance holder 1 near the lower lance holder 2, and an inner tube 4 is inserted into the first fixing groove 3. A second fixing groove 5 is provided in the middle of the side of the lower lance holder 2 away from the upper lance holder 1, and an outer tube 6 is provided in the second fixing groove 5. The inner tube 4 and the outer tube 6 are coaxially arranged. Multiple spiral guide plates 7 are arranged in a matrix on the outer side of the end of the inner tube 4 away from the upper lance holder 1. Oxygen can enter between the inner tube 4 and the outer tube 6 through the lower lance holder 2. When the airflow passes through the spiral guide plate 7 at the end of the inner tube 4, it is vertically injected into the furnace body to form a spiral columnar jet into the molten pool. After the oxygen forms a spiral columnar jet, it breaks at the top of the gas jet to form a stable bubble band, thereby avoiding the "bubble backsinking" phenomenon at the bottom of the furnace body, thus extending the life of the oxygen lance and the furnace body. At the same time, it reduces the splashing of the molten material. A first sealing ring 8 is provided between the upper lance holder 1 and the lower lance holder 2. The first sealing ring 8 can seal the contact surface between the upper lance holder 1 and the lower lance holder 2. The spiral angle of the spiral guide plate 7 is not less than 15°.

[0016] A second sealing ring 9 is provided between the inner tube 4 and the upper gun seat 1, which can seal the contact surface between the inner tube 4 and the upper gun seat 1.

[0017] A third sealing ring 10 is provided between the outer tube 6 and the lower gun seat 2, which can seal the contact surface between the outer tube 6 and the lower gun seat 2.

[0018] The upper gun holder 1 and the lower gun holder 2 are fixedly connected by bolts 11.

[0019] Both the upper gun holder 1 and the lower gun holder 2 are provided with connecting flanges 12. The connection flanges 12 make it easier for the upper gun holder 1 and the lower gun holder 2 to be connected to external pipelines.

[0020] The outer tube 6 is fixedly connected to the furnace body at the end furthest from the upper gun seat 1.

[0021] Specifically, in this invention, oxygen can enter between the inner tube 4 and the outer tube 6 through the lower lance holder 2. When the airflow passes through the spiral guide plate 7 at the end of the inner tube 4, it is vertically injected into the furnace body to form a spiral columnar jet into the molten pool. After the oxygen forms a spiral columnar jet, it breaks at the top of the gas jet to form a stable bubble band, thereby avoiding the "bubble backsinking" phenomenon at the bottom of the furnace body, thus extending the life of the oxygen lance and the furnace body. At the same time, it reduces the splashing of the molten material. The first sealing ring 8 can seal the contact surface between the upper lance holder 1 and the lower lance holder 2, the second sealing ring 9 can seal the contact surface between the inner tube 4 and the upper lance holder 1, and the third sealing ring 10 can seal the contact surface between the outer tube 6 and the lower lance holder 2.

[0022] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An oxygen lance for a bottom-blown copper smelting furnace with a spiral air duct, comprising an upper lance holder (1), characterized in that, The upper gun seat (1) is provided with a lower gun seat (2) on one side. The upper gun seat (1) is provided with a first fixing groove (3) on the side near the lower gun seat (2). An inner tube (4) is inserted into the first fixing groove (3). A second fixing groove (5) is provided in the middle of the side of the lower gun seat (2) away from the upper gun seat (1). An outer tube (6) is provided in the second fixing groove (5). The inner tube (4) and the outer tube (6) are coaxially arranged. Multiple spiral guide plates (7) are provided on the outer side of the end of the inner tube (4) away from the upper gun seat (1). A first sealing ring (8) is provided between the upper gun seat (1) and the lower gun seat (2). The spiral angle of the spiral guide plate (7) is not less than 15°.

2. The oxygen lance of a bottom-blown copper smelting furnace with a spiral air duct according to claim 1, characterized in that, A second sealing ring (9) is provided between the inner tube (4) and the upper gun seat (1).

3. The oxygen lance of a bottom-blown copper smelting furnace with a spiral air duct according to claim 1, characterized in that, A third sealing ring (10) is provided between the outer tube (6) and the lower gun seat (2).

4. The oxygen lance of a bottom-blown copper smelting furnace with a spiral air duct according to claim 1, characterized in that, The upper gun seat (1) and the lower gun seat (2) are fixedly connected by bolts (11).

5. An oxygen lance for a bottom-blown copper smelting furnace with a spiral air duct according to claim 1, characterized in that, Both the upper gun holder (1) and the lower gun holder (2) are provided with connecting flanges (12).

6. An oxygen lance for a bottom-blown copper smelting furnace with a spiral air duct according to claim 1, characterized in that, The outer tube (6) is fixedly connected to the furnace body at the end furthest from the upper gun seat (1).

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