Tundish for steel smelting

Abstract

The utility model relates to the technical field of steel and iron smelting, and discloses a tundish for steel and iron smelting, which comprises a tundish, a slag baffle is fixedly mounted on the tundish, a liquid permeable hole is formed in the slag baffle, a slag overflow groove is further formed in the tundish, water gaps are uniformly embedded in the bottom of the tundish at equal intervals, an anti-impact plate is arranged in the tundish, and the anti-impact plate is connected with the tundish. The anti-impact plate is located at the position between the tundish and the slag baffle, and a speed reducing mechanism and a lifting mechanism are arranged on the anti-impact plate. By optimizing the design of the tundish, inclusions in molten steel are effectively reduced, and the durability of equipment is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of iron and steel smelting, and particularly relates to a tundish for iron and steel smelting. Background Art

[0002] In modern iron and steel smelting processes, the tundish is an important device connecting the steelmaking furnace and the continuous casting machine. Its main function is to provide a buffer between steelmaking and casting to ensure the stability and uniformity of the molten steel flow when flowing into the continuous casting machine. With the continuous development of the iron and steel industry, the requirements for the quality of molten steel and production efficiency are getting higher and higher, and the design and technology of the tundish are also constantly improving.

[0003] A patent document with the publication number CN218252881U discloses a continuous casting tundish, which includes a tundish body. A slag retaining wall and a guard plate are arranged on the tundish body. The slag retaining wall and the guard plate are hermetically connected, and both the slag retaining wall and the guard plate are hermetically connected to the tundish body. The slag retaining wall, the guard plate and a part of the tundish body form a molten steel impact space. An overflow slag groove is opened on the guard plate. The slag retaining wall includes a baffle, and the baffle has a plurality of arc-shaped transition zones. A plurality of molten steel flow holes are opened on the slag retaining wall, and the molten steel in the impact space can flow out through each molten steel flow hole.

[0004] However, the above device has the following problems when in use: The high temperature and high-speed impact of the molten steel will cause serious wear and damage to the inner wall of the tundish, resulting in a short service life of the equipment. Frequent maintenance and replacement increase the production cost, and the existing tundish design has many inconveniences in cleaning and maintenance. Especially for the cleaning and replacement of key components such as impact-resistant plates, it requires a long downtime, affecting the production efficiency. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the problems existing in the prior art, and a tundish for iron and steel smelting is proposed. By optimizing the design of the tundish, the inclusions in the molten steel are effectively reduced, and the durability of the equipment is enhanced.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A tundish for iron and steel smelting includes a tundish. A slag retaining plate is fixedly installed on the tundish. Liquid permeating holes are opened on the slag retaining plate. An overflow slag groove is also opened on the tundish. Nozzles are evenly embedded and installed at equal intervals at the bottom of the tundish. An impact-resistant plate is arranged inside the tundish. The impact-resistant plate is located between the tundish and the slag retaining plate, and a deceleration mechanism and a lifting mechanism are arranged on the impact-resistant plate.

[0008] Preferably, the deceleration mechanism includes a deceleration chamber. The deceleration chamber is fixedly installed on the slag retaining plate. An outlet liquid channel is opened at the bottom of the deceleration chamber. A right deceleration inclined plate and a left deceleration inclined plate are fixedly installed inside the outlet liquid channel.

[0009] Preferably, both the right deceleration inclined plate and the left deceleration inclined plate are inclined plate-like structures, but the inclined angles are opposite. Both the right deceleration inclined plate and the left deceleration inclined plate form a blanking channel with the deceleration chamber, but the blanking channels are on different sides, and the right deceleration inclined plate and the left deceleration inclined plate are alternately arranged.

[0010] Preferably, a splash-proof chamber is fixedly installed on the deceleration chamber, and the splash-proof chamber is a hollow frustum structure that is narrow at the top and wide at the bottom.

[0011] Preferably, two reinforcing blocks are fixedly installed inside the tundish, and the reinforcing blocks are fixedly connected to the slag baffle.

[0012] Preferably, the lifting mechanism includes sliders. The number of sliders is two, and the sliders are slidably installed inside the corresponding reinforcing blocks. The sliders are fixedly connected to the impact-resistant plate. A moving rod is fixedly installed on the impact-resistant plate, and the two moving rods penetrate through the reinforcing blocks and are fixedly installed with a control board.

[0013] Preferably, a mounting frame is fixedly installed on the tundish, and lifting lugs are fixedly installed on the mounting frame. The number of lifting lugs is four, and they are distributed in pairs on the front and rear sides of the mounting frame.

[0014] Compared with the prior art, the present utility model has the following beneficial effects:

[0015] (1) Through the combination of the impact-resistant plate and the reinforcing blocks, the present utility model significantly extends the service life of the equipment. The impact-resistant plate can effectively absorb and disperse the impact energy of the molten steel, reduce the direct impact on the inner wall of the tundish, protect the inner wall from damage while slowing down the flow rate of the molten steel, which helps the fine inclusions in the molten steel to settle under the action of gravity, thereby reducing the chance of these impurities entering the continuous casting machine with the molten steel. Moreover, the fixed connection between the reinforcing blocks and the slag baffle enhances the firmness of the overall structure, improves the stability and impact resistance of the equipment, and thus extends the service life of the tundish.

[0016] (2) By making the control board 9 move up and down, the moving rod and the slider can move up and down synchronously. On the one hand, the large impurities on the impact-resistant plate can be lifted synchronously, facilitating the cleaning operation and ensuring the cleanliness inside the impact part of the tundish; on the other hand, it is convenient to repair and reinforce the working layer of the impact-resistant plate and the deceleration mechanism. This not only reduces the downtime but also lowers the maintenance cost, further improving the continuity and stability of production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a tundish for steel smelting proposed by the present utility model;

[0018] Figure 2Schematic diagram of the side of a tundish for steel smelting proposed by the present utility model;

[0019] Figure 3 Internal sectional view of a tundish for steel smelting proposed by the present utility model;

[0020] Figure 4 Schematic diagram of a deceleration mechanism of a tundish for steel smelting proposed by the present utility model.

[0021] In the figure: 1, tundish; 2, mounting frame; 3, lifting lug; 4, nozzle; 5, slag baffle; 6, liquid permeating hole; 7, reinforcement block; 8, moving rod; 9, control panel; 10, slag overflow tank; 11, deceleration chamber; 12, splash-proof chamber; 13, impact-resistant plate; 14, slider; 15, right deceleration inclined plate; 16, left deceleration inclined plate; 17, liquid outlet channel. Specific implementation mode

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0023] Please refer to Figures 1 to 4 , a tundish for steel smelting, including a tundish 1. The tundish 1 is the core part of the whole device, used to carry high-temperature molten steel, and optimize the flow characteristics of the molten steel through its internal design, reduce non-metallic inclusions, and improve the purity of the molten steel. The same as the existing technology, from the outside to the inside are steel plate, permanent layer and working layer in sequence.

[0024] A slag baffle 5 is fixedly installed on the tundish 1, and a liquid permeating hole 6 is opened on the slag baffle 5. The main function of the slag baffle 5 is to block larger non-metallic inclusions in the molten steel and prevent them from entering the subsequent processes. The liquid permeating hole 6 allows the molten steel to pass through and further screens out fine impurities.

[0025] A slag overflow tank 10 is also opened on the tundish 1. When the floating slag in the molten steel accumulates to a certain amount, it can be discharged through the slag overflow tank 10 to avoid these impurities affecting the subsequent process.

[0026] Nozzles 4 are evenly embedded and installed at equal intervals at the bottom of the tundish 1. The nozzles 4 are located at the bottom of the tundish 1 and are used to control the flow rate and flow of the molten steel to the continuous casting machine to ensure the smooth progress of the pouring process.

[0027] An impact-resistant plate 13 is arranged inside the tundish 1. The impact-resistant plate 13 is used to absorb and disperse the impact force of the molten steel flowing into the tundish 1, protect the inner wall of the tundish 1 from damage. The impact-resistant plate 13 is located between the tundish 1 and the slag baffle 5, and a deceleration mechanism and a lifting mechanism are arranged on the impact-resistant plate 13.

[0028] Preferably, methods such as argon blowing and adding filters can be adopted in the tundish 1 to further promote the removal of inclusions. The bubbles generated by argon blowing can capture inclusion particles and carry them to float upward. At the same time, the presence of bubbles can also promote the collision and aggregation of inclusions, accelerating their floating process.

[0029] The deceleration mechanism slows down the flow rate of the molten steel and reduces the impact force by designing a special feeding channel (composed of a right-side deceleration inclined plate 15 and a left-side deceleration inclined plate 16), while promoting the separation of impurities in the molten steel.

[0030] The deceleration mechanism includes a deceleration chamber 11. The deceleration chamber 11 is fixedly installed on the slag baffle 5. An outlet channel 17 is opened at the bottom of the deceleration chamber 11. A right-side deceleration inclined plate 15 and a left-side deceleration inclined plate 16 are fixedly installed inside the outlet channel 17.

[0031] Both the right-side deceleration inclined plate 15 and the left-side deceleration inclined plate 16 are inclined plate-like structures, but the inclined angles are opposite. Both the right-side deceleration inclined plate 15 and the left-side deceleration inclined plate 16 form a feeding channel with the deceleration chamber 11, but the feeding channels are on different sides, and the right-side deceleration inclined plate 15 and the left-side deceleration inclined plate 16 are alternately arranged.

[0032] A splash-proof chamber 12 is fixedly installed on the deceleration chamber 11. The splash-proof chamber 12 is a hollow frustum structure with a narrow upper part and a wide lower part, which can effectively reduce the splash phenomenon of the molten steel during the flowing process, keep the working environment clean, and reduce safety risks.

[0033] Two reinforcing blocks 7 are fixedly installed inside the tundish 1. The reinforcing blocks 7 are fixedly connected to the slag baffle 5. The reinforcing blocks 7 not only enhance the stability of the slag baffle 5, but also improve the impact resistance of the slag baffle 5, and also provide a basis for installing other components (such as the slider 14), increasing the firmness of the overall structure.

[0034] The lifting mechanism includes sliders 14. The number of sliders 14 is two, and the sliders 14 are slidably installed inside the corresponding reinforcing blocks 7. The sliders 14 are fixedly connected to the impact-resistant plate 13. A moving rod 8 is fixedly installed on the impact-resistant plate 13. Two moving rods 8 penetrate through the reinforcing blocks 7 and are fixedly installed with a control board 9.

[0035] The operator makes the control board 9 perform lifting activities manually or through a corresponding driving source (such as a cylinder, a motor, etc., not shown in the figure). The moving rod 8 and the slider 14 can perform lifting activities synchronously. On the one hand, it makes the large impurities on the impact-resistant plate 13 rise synchronously, facilitating the cleaning activity and ensuring the cleanliness of the impact part inside the tundish 1. On the other hand, it facilitates the maintenance and reinforcement of the working layer of the impact-resistant plate 13 and the deceleration mechanism.

[0036] An installation frame 2 is fixedly installed on the tundish 1. A lifting lug 3 is fixedly installed on the installation frame 2. The number of lifting lugs 3 is four, and they are distributed in pairs on the front and rear sides of the installation frame 2. The installation frame 2 provides a stable support frame for the entire tundish 1, while the four lifting lugs 3 distributed on the front and rear sides of the installation frame 2 facilitate the handling and installation using equipment such as cranes, improving the convenience and safety of the operation.

[0037] The working process of the present utility model: The high-temperature molten steel flows out of the steelmaking furnace and enters the top of the tundish 1 through a dedicated channel. After the molten steel enters the tundish 1, it first passes through the splash-proof chamber 12. Its design with a narrow upper part and a wide lower part helps to reduce the splash when the molten steel enters, protects the operating environment and reduces safety risks. Subsequently, the molten steel flows through the right deceleration inclined plate 15 and the left deceleration inclined plate 16 in the deceleration chamber 11. The alternating arrangement and opposite inclination angles of these two inclined plates can effectively slow down the flow rate of the molten steel, reduce the impact force, and promote the settlement of fine inclusions in the molten steel.

[0038] The molten steel enters the interior of the tundish 1 through the liquid-permeating holes 6 on the slag baffle 5. During this process, larger particle inclusions are blocked by the slag baffle 5, while fine impurities may pass through the liquid-permeating holes 6 together with the molten steel, but will be further processed in the next steps.

[0039] Finally, the molten steel after the above treatment flows through the nozzles 4 evenly distributed at the bottom of the tundish 1 to the continuous caster to start the next production link.

[0040] When maintenance is required, the operator can make the control panel 9 move up and down manually or through a corresponding drive source (such as a cylinder, a motor, etc., not shown in the figure). The moving rod 8 and the slider 14 can move up and down synchronously. On the one hand, it makes the large impurities on the impact-resistant plate 13 rise synchronously, facilitating the cleaning activity and ensuring the cleanliness inside the impact part of the tundish 1. On the other hand, it is convenient to repair and reinforce the working layer of the impact-resistant plate 13 and the deceleration mechanism.

[0041] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A tundish for steel smelting, comprising a tundish (1), a slag baffle (5) is fixedly installed on the tundish (1), a liquid permeating hole (6) is formed in the slag baffle (5), an overflow slag groove (10) is further formed in the tundish (1), and nozzles (4) are evenly embedded and installed at equal intervals at the bottom of the tundish (1), characterized in that, An impact-resistant plate (13) is arranged inside the tundish (1). The impact-resistant plate (13) is located between the tundish (1) and the slag dam (5), and a deceleration mechanism and a lifting mechanism are arranged on the impact-resistant plate (13).

2. The tundish for steel smelting according to claim 1, characterized in that, The deceleration mechanism includes a deceleration chamber (11). The deceleration chamber (11) is fixedly installed on the slag dam (5). A liquid outlet channel (17) is opened at the bottom of the deceleration chamber (11), and a right deceleration inclined plate (15) and a left deceleration inclined plate (16) are fixedly installed inside the liquid outlet channel (17).

3. The tundish for steel smelting according to claim 2, characterized in that, Both the right deceleration inclined plate (15) and the left deceleration inclined plate (16) are inclined plate-like structures, but the inclined angles are opposite. Both the right deceleration inclined plate (15) and the left deceleration inclined plate (16) form a blanking channel with the deceleration chamber (11), but the blanking channels are on different sides, and the right deceleration inclined plate (15) and the left deceleration inclined plate (16) are alternately arranged.

4. The tundish for steel smelting according to claim 2, characterized in that, A splash-proof chamber (12) is fixedly installed on the deceleration chamber (11). The splash-proof chamber (12) is a hollow frustum structure with a narrow upper part and a wide lower part.

5. The tundish for steel smelting according to claim 1, characterized in that, Two reinforcing blocks (7) are fixedly installed inside the tundish (1), and the reinforcing blocks (7) are fixedly connected to the slag dam (5).

6. The tundish for steel smelting according to claim 1, characterized in that The lifting mechanism includes sliders (14). The number of sliders (14) is two, and the sliders (14) are slidably installed inside the corresponding reinforcing blocks (7). The sliders (14) are fixedly connected to the impact-resistant plate (13). A moving rod (8) is fixedly installed on the impact-resistant plate (13), and the two moving rods (8) penetrate through the reinforcing blocks (7) and are fixedly installed with a control board (9). A control board (9) is fixedly installed.

7. The tundish for steel smelting according to claim 1, characterized in that, An installation frame (2) is fixedly installed on the tundish (1). A lifting lug (3) is fixedly installed on the installation frame (2). The number of lifting lugs (3) is four, and they are distributed in pairs on the front and rear sides of the installation frame (2).

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