Top protection device for integral air brick

Abstract

The utility model relates to the technical field of air-permeable bricks, in particular to an integral air-permeable brick top protection device which comprises a brick base and an air-permeable core, a circular-truncated-cone-shaped through hole is formed in the center of the brick base, the air-permeable core is installed in the brick base through hole, a plurality of air guide pipes are arranged in the air-permeable core, and a fireproof filling material is arranged in the air-permeable core. And a plugging head is arranged in the gas output end of the gas guide pipe and is a solid material with the melting point lower than the molten steel temperature. The plugging head is arranged at the end of the gas guide pipe, impurities are prevented from blocking the gas guide pipe, and the gas guide pipe is automatically melted after making contact with molten steel, so that conduction of the gas guide pipe is easily recovered, and use is convenient.

Description

Technical Field

[0001] This application relates to the technical field of permeable bricks, and particularly to a top protection device for an integral permeable brick. Background Art

[0002] The permeable brick, also known as the permeable core, is a permeable device installed at the bottom of the ladle to transport argon into the ladle through an argon pipeline, thereby reducing the hydrogen content in the molten steel. The permeable brick usually includes various structures such as a dispersion type, a slit type, and a straight through hole type. Among them, a stainless steel gas pipe is arranged inside the straight through hole type to transport gas, but during the installation process, the stainless steel gas pipe is prone to blockage.

[0003] In the patent document with the publication number CN210254212U, a top protection device for an integral permeable brick is disclosed. The top is protected by pouring materials on the top of the permeable core, but this technical solution relies on the erosion of the molten steel on the pouring materials to open the permeable core, and it is rather troublesome to open the permeable core. Summary of the Invention

[0004] Aiming at the deficiencies of the existing technology, the purpose of this application is to provide a top protection device for an integral permeable brick that is convenient to use.

[0005] The above application purpose of this application is achieved through the following technical solutions:

[0006] A top protection device for an integral permeable brick, comprising:

[0007] A brick base, with a frustum-shaped through hole opened at the center of the brick base;

[0008] A permeable core, installed in the through hole of the brick base. Multiple gas pipes are arranged inside the permeable core, and a refractory filling material is arranged inside the permeable core;

[0009] A plugging head, arranged inside the gas output end of the gas pipe;

[0010] Among them, the plugging head is a solid material with a melting point lower than the temperature of the molten steel.

[0011] Optionally, the material of the plugging head is aluminum.

[0012] Optionally, a porous refractory material layer is arranged at one end of the refractory filling material close to the plugging head, and multiple air holes are opened on the side wall of one end of the gas pipe located inside the porous refractory material layer.

[0013] Optionally, the plugging length of the plugging head is not greater than 1 / 2 of the thickness of the porous refractory material layer.

[0014] Optionally, the thickness of the porous refractory material layer does not exceed 1 / 10 of the thickness of the refractory filling material.

[0015] Optionally, a hollow layer is provided between the porous refractory material layer and the refractory filling material, and air-permeable holes are also formed in the side wall of the air duct in the hollow layer.

[0016] Optionally, the porous refractory material layer protrudes from the brick base.

[0017] Optionally, a support ring is arranged outside the hollow layer, and the support ring separates the porous refractory material layer from the refractory filling material.

[0018] In summary, the present application includes at least one of the following beneficial technical effects:

[0019] By providing a plugging head at the end of the air duct, the present application avoids sundries from blocking the air duct and melts automatically after contacting the molten steel, making it easier for the air duct to resume conduction and facilitating use;

[0020] A porous refractory material layer is provided at one end of the plugging head. When the molten steel enters the ladle and has not melted the air duct yet, the air duct can supply part of the gas through the air-permeable holes to the porous refractory material layer, reducing the influence of the melting time of the plugging head on the molten steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present application;

[0022] Figure 2 is Figure 1 an enlarged schematic view of part A in

[0023] Reference numerals: 1, brick base;

[0024] 2, air-permeable core; 21, air duct; 22, refractory filling material; 221, porous refractory material layer; 222, hollow layer; 223, support ring;

[0025] 3, plugging head. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The present application will be further described in detail below with reference to the accompanying drawings.

[0027] Please refer to Figure 1 , which discloses a top protection device for an integral porous plug of an embodiment of the present application, including a brick base 1 and an air-permeable core 2. A frustum-shaped through hole is formed in the center of the brick base 1, the air-permeable core 2 is installed in the through hole of the brick base 1, a plurality of air ducts 21 are arranged inside the air-permeable core 2, a refractory filling material 22 is arranged in the air-permeable core 2, a plugging head 3 is arranged at the gas output end of the air duct 21, and the plugging head 3 is made of a solid material with a melting point lower than the temperature of the molten steel.

[0028] Specifically, the brick seat 1 is installed at the bottom of the ladle, the breathable core 2 is installed inside the brick seat 1, the bottom of the breathable core 2 is connected to a gas pipe to input argon or other gases, the gas enters the ladle through the gas guide pipe 21, a plug 3 is arranged at the gas output end of the breathable core 2. When installing the porous brick, it can prevent sundries from falling into the breathable core 2 and blocking the gas guide pipe 21. The melting point of the plug 3 is lower than the temperature of the molten steel. After the ladle is filled with molten steel, the plug 3 melts at high temperature, and the melted liquid is pushed out of the gas guide pipe 21 under the gas pressure, making the gas guide pipe 21 conductive.

[0029] In this way, by arranging the plug 3 at the end of the gas guide pipe 21, it can prevent sundries from blocking the gas guide pipe 21, and it will melt by itself after contacting the molten steel, making it easier for the gas guide pipe 2 to resume conduction and facilitating use.

[0030] In some feasible ways, the gas guide pipe 21 is fixed inside the breathable core 2 through the refractory filling material 22. Before installing the gas guide pipe 21, by inserting the end of the gas guide pipe 21 into the melted liquid of the plug 3, the diameter of the gas guide pipe 21 is small, and the melted liquid will form a plug at the end of the gas guide pipe 21 and form a solid plug after cooling. The plug 3 is made of a solid material with a melting point lower than the temperature of the molten steel, which is convenient to manufacture and use.

[0031] As a specific implementation manner of an overall top protection device for the porous brick provided by the application, the material of the plug 3 is aluminum.

[0032] Overall, The melting point of the aluminum material is much lower than that of steel, making it easier to melt in the molten steel. And when replacing the porous brick, there may still be some residual temperature in the ladle. The melting point of the aluminum material makes it not melt at the residual temperature. At the same time, the hardness of the aluminum material is small and it may be pushed out by the gas pressure, reducing the time required for the molten steel to melt the gas guide pipe 21 and being more convenient to use.

[0033] As provided in the application An overall top protection device for the porous brick Another specific implementation One end of the refractory filling material 22 close to the plug 3 is provided with a porous refractory material layer 221, and a plurality of air holes are opened on the side wall of one end of the gas guide pipe 21 located inside the porous refractory material layer 221.

[0034] Combined with the specific use scenario, a porous refractory material layer 221 is arranged at one end of the plug 3. When the molten steel enters the ladle and has not melted the gas guide pipe 21 yet, the gas guide pipe 21 can supply part of the gas to the porous refractory material layer 221 through the air holes, reducing the influence of the melting time of the plug 3 on the molten steel.

[0035] In some feasible ways, the porous refractory material layer 221 can be selected as the porous filling material of the diffusive porous plug, and gas diffusion is carried out through the porous nature of the material itself. To reduce the influence of the blocking part of the plug 3 on the porous refractory material layer 221, the blocking length of the plug 3 is not greater than 1 / 2 of the thickness of the porous refractory material layer 221. To reduce the influence of the porous refractory material layer 221 on the service durability of the whole refractory brick, the thickness of the porous refractory material layer 221 does not exceed 1 / 10 of the thickness of the refractory filling material 22.

[0036] Furthermore, a hollow layer 222 is provided between the porous refractory material layer 221 and the refractory filling material 22, and air holes are also formed on the side wall of the gas guide pipe 21 in the hollow layer 222.

[0037] It should be understood that by providing the hollow layer 222, gas can first diffuse into the hollow layer 222 and then enter the porous refractory material layer 221, increasing the gas diffusion ability of the porous refractory material layer 221.

[0038] In some feasible ways, a support ring 223 is provided outside the hollow layer 222. The support ring 223 separates the porous refractory material layer 221 from the refractory filling material 22. By providing the support ring 223, it is convenient to form a hollow between different material layers.

[0039] Furthermore, the porous refractory material layer 221 protrudes from the brick base 1.

[0040] It should be understood that during the use process, the porous plug will gradually disintegrate under the erosion of molten steel until the porous plug needs to be replaced. By providing that the porous refractory material layer 221 protrudes from the brick base 1, the erosion rate of the molten steel on the porous refractory material layer 221 is increased, causing this part to fall off, which is convenient for giving full play to the advantages of the straight-through hole type porous plug through the gas guide pipe 21.

[0041] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. An overall breathable brick top protection device, characterized in that, Including: A brick base (1) with a frustum-shaped through hole opened at the center thereof; A breathable core (2) installed in the through hole of the brick base (1). A plurality of air guide pipes (21) are arranged inside the breathable core (2), and a refractory filling material (22) is arranged inside the breathable core (2); A plugging head (3) arranged inside the gas output end of the air guide pipe (21); Wherein, the plugging head (3) is made of a solid material with a melting point lower than the temperature of molten steel.

2. The top protection device of an integral breathable brick according to claim 1, characterized in that: The plugging head (3) is made of aluminum.

3. The top protection device for an integral breathable brick according to claim 1, characterized in that: One end of the refractory filling material (22) close to the plugging head (3) is provided with a porous refractory material layer (221), and a plurality of air holes are opened on the side wall of one end of the air guide pipe (21) located inside the porous refractory material layer (221).

4. The top protection device for an integral breathable brick according to claim 3, characterized in that: The plugging length of the plugging head (3) is not greater than 1 / 2 of the thickness of the porous refractory material layer (221).

5. The top protection device of an integral breathable brick according to claim 3, characterized in that: The thickness of the porous refractory material layer (221) does not exceed 1 / 10 of the thickness of the refractory filling material (22).

6. The top protection device of an integral breathable brick according to claim 3, characterized in that: A hollow layer (222) is arranged between the porous refractory material layer (221) and the refractory filling material (22), and air holes are also opened on the side wall of the air guide pipe (21) inside the hollow layer (222).

7. The top protection device of an integral breathable brick according to claim 3, characterized in that: The porous refractory material layer (221) protrudes from the brick base (1).

8. The top protection device for an integral breathable brick according to claim 6, characterized in that: A support ring (223) is arranged outside the hollow layer (222), and the support ring (223) separates the porous refractory material layer (221) from the refractory filling material (22).

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