A long service life lightweight main groove gate plate

Abstract

This application discloses a lightweight blast furnace main trough gate with a long service life, belonging to the field of iron and steel smelting. It includes a gate body cast from refractory castable. The gate body has perforations above the slag line of the iron trough for lifting equipment to pass through. By pre-reserving perforations above the slag line of the gate body, the main trough gate facilitates lifting equipment passage, reduces the number of steel structural components, and makes the gate lightweight. It also effectively avoids the risk of the gate body cracking due to differences in the thermal expansion coefficients of different materials, thereby increasing the service life of the gate body and saving on the amount of refractory castable used, thus reducing the weight of the gate body.

Description

Technical Field

[0001] This application relates to the field of iron and steel smelting technology, specifically a lightweight blast furnace main trough gate with a long service life. Background Technology

[0002] In the blast furnace ironmaking process, the molten iron-slag mixture flowing out of the blast furnace taphole is a mixture of molten iron and slag. The gate is a key piece of equipment placed in the tapping trough to separate the slag and iron. It ensures that the slag and iron are separated when the blast furnace taps iron, blocking the iron slag and allowing it to enter the slag trough; and that no slag remains in the molten iron. Only when there is no molten iron in the slag can the ironmaking and subsequent steelmaking processes proceed normally.

[0003] like Figure 3 As shown, traditional gate valves, for ease of hoisting, are manufactured using refractory castable to form the main body 1'. During the casting of the main body 1', a steel structural member 2' is inserted inside, with its ring extending beyond the top of the main body 1' for easy hoisting. However, due to the significant difference in thermal expansion coefficients between the refractory castable and the steel structural member 2', prolonged contact between the gate valve and high-temperature molten iron and slag can easily cause it to crack, affecting its service life.

[0004] Therefore, this application provides a lightweight main trench gate with a long service life to solve the above problems. Utility Model Content

[0005] This application provides a lightweight main trench gate with a long service life, aiming to solve the problem mentioned in the background art that the existing main trench gate is prone to cracking due to the difference in thermal expansion coefficients between the gate body and the steel structure hoisting components, which affects the service life of the gate.

[0006] To achieve the above objectives, this application provides the following technical solution: a lightweight main trench gate with a long service life, comprising a gate body cast from refractory castable, wherein the gate body has perforations at a position corresponding to the slag line above the iron trench for lifting equipment to pass through. This not only facilitates the lifting of the main trench gate but also avoids the risk of the gate cracking due to the difference in thermal expansion coefficients. Therefore, it can improve the service life of the main trench gate and effectively reduce the amount of refractory material used, thus reducing the weight of the main trench gate. The presence of perforations can also absorb the high-temperature expansion of the entire gate during high-temperature use, reducing thermal stress-induced continuous cracking of the gate and reducing abnormal damage to the gate, thereby further improving the lifespan and stability of the gate.

[0007] Preferably, at least two perforations are provided.

[0008] Preferably, the gate body is in the shape of a trapezoid, and the cross-sectional area of ​​the gate body increases sequentially from the end closest to the inside of the iron discharge groove to the end furthest from the inside of the iron discharge groove.

[0009] Preferably, the gate body has grooves on all four edges in the height direction, and the notches form protrusions on the gate body that contact the inner wall of the iron outlet groove.

[0010] Preferably, the inner wall of the iron outlet groove has a mounting groove adapted to the protrusion.

[0011] The main ditch gate has a pre-drilled hole above the slag line on the gate body, which facilitates the lifting of the lifting equipment. The gate body is made entirely of refractory castable, which reduces the number of steel structural components. This effectively avoids the risk of the gate body cracking due to the different thermal expansion coefficients of different materials, improves the service life of the gate body, and saves refractory castable, thus reducing the weight of the gate body.

[0012] This main trench gate, by pre-reserving grooves on its four edges along the height of the gate body, effectively reduces the amount of refractory castable used, thereby reducing the weight of the gate body. This also facilitates the installation of the gate body, allowing it to better integrate with the main trench into a stable whole, reducing abnormal damage and extending the gate's lifespan. The four grooves also reduce the weight of the gate body, further reducing the amount of refractory material used and contributing to the gate's lightweight design. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a lightweight main trench gate.

[0014] Figure 2 This is a schematic diagram of the installation structure for a lightweight main trench gate.

[0015] Figure 3 This is a schematic diagram of the structure of a traditional main trench gate.

[0016] In the picture:

[0017] 1. Gate body;

[0018] 11. Protruding part;

[0019] 2. Perforation;

[0020] 3. Exit the iron ditch;

[0021] 31. Slag line; 32. Installation groove;

[0022] 4. Notch or groove. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] Example 1

[0025] This embodiment provides a lightweight main trench gate with a long service life, such as... Figure 1 and Figure 2 As shown, the main ditch gate includes a gate body 1, which is cast from refractory castable. The gate body 1 has a perforation 2 at a position above the slag line 31 of the iron ditch 3 for the lifting equipment to pass through.

[0026] During gate production, refractory castable is poured into a mold, with perforations 2 pre-drilled in the mold. After the refractory castable solidifies, the mold is removed to obtain the gate body 1 with the perforations 2. In use, lifting equipment can be passed through the perforations 2 to lift and transport the gate body 1. This not only facilitates the handling of the gate body 1 but also effectively reduces the amount of refractory castable used, thus reducing the weight of the gate body. Furthermore, it effectively avoids the risk of the gate body 1 cracking due to the difference in thermal expansion coefficients between the steel structural components and the refractory castable, improving the service life and safety of the main trench gate. The presence of these two large hollow holes also absorbs the high-temperature expansion of the entire gate body during high-temperature use, reducing thermal stress that could lead to continuous cracking and abnormal damage, thereby further improving the gate's lifespan and stability.

[0027] Among them, refractory castable is a mixture of refractory aggregates, binders and admixtures, which is mixed with water (or liquid binder) to form a mud material that can be applied by casting.

[0028] It is worth mentioning that, in order to ensure the stability of the hoisting, at least two perforations 2 are provided.

[0029] Furthermore, to facilitate the use and installation of the gate body 1, the gate body 1 is in the shape of a trapezoid, and the cross-sectional area of ​​the gate body 1 increases sequentially from the end closest to the inside of the iron outlet groove 3 to the end furthest from the inside of the iron outlet groove 3.

[0030] Understandably, during installation, the gate body 1 is lifted to the top of the iron discharge trench 3 using a lifting device, so that the two side walls of the gate body 1 contact the two inner side walls of the iron discharge trench 3 respectively, and the bottom of the gate body 1 is inserted into the iron discharge trench 3, thus completing the installation of the gate body 1.

[0031] Example 2

[0032] This embodiment provides a lightweight main trench gate with a long service life, such as... Figure 1 and Figure 2 As shown, the gate body 1 of the main channel gate has grooves 4 on all four edges in the height direction. The grooves 4 form protrusions 11 on the gate body 1 that contact the inner wall of the iron discharge channel 3. The inner wall of the iron discharge channel 3 has mounting grooves 32 that are adapted to the protrusions 11.

[0033] During installation, the protrusion 11 of the gate body 1 is inserted into the iron discharge groove 3 along the mounting groove 32, which can fix the gate body 1 in the length direction of the iron discharge groove 3.

[0034] It should be noted that after the gate body 1 is installed inside the tapping trough 3, in order to ensure the integrity and reliability of the gate body and the tapping trough, refractory castable needs to be filled on the contact surface between the gate body 1 and the tapping trough 3. This effectively fills the gap between the gate body 1 and the tapping trough 3, ensuring not only the stability of slag discharge but also allowing the gate to better integrate with the tapping trough into a stable whole, reducing abnormal damage and extending the gate's lifespan. The four grooves on the gate also reduce the weight of the gate body, further reducing the amount of refractory material used and making the gate lighter.

[0035] Compared with the original technology, this invention saves 3-5% on refractory materials for the gate valve, extends its service life by 10-15%, and improves economic benefits by about 10%. Therefore, this technology significantly reduces costs and increases efficiency for enterprises. It also reduces resource waste and has social benefits of green emission reduction.

[0036] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be included within the scope of protection of this application.

Claims

1. A long service life lightweight main runner gate, comprising a gate body (1) cast from refractory castable, characterized in that: The gate body (1) has a perforation (2) above the slag line (31) of the iron trough (3) for the lifting device to pass through.

2. The long-life lightweight main land gate according to claim 1, characterized in that: The perforation (2) is provided in at least two parts.

3. The long-life lightweight main land gate according to claim 1, characterized in that: The gate body (1) is in the shape of a trapezoid, and the cross-sectional area of ​​the gate body (1) increases sequentially from the end closest to the inside of the iron discharge groove (3) to the end furthest from the inside of the iron discharge groove (3).

4. The long-life lightweight main land gate according to claim 1, characterized in that: The gate body (1) has grooves (4) on all four edges in the height direction, and the grooves (4) form protrusions (11) on the gate body (1) that contact the inner wall of the iron outlet groove (3).

5. The long-life lightweight main land gate as claimed in claim 4, wherein: The inner wall of the iron outlet groove (3) has a mounting groove (32) that is adapted to the protrusion (11).

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