Composite brick for furnace wall of submerged arc furnace

Abstract

The utility model discloses a submerged arc furnace wall composite brick which comprises a composite brick shell, a first inner cavity is formed in the composite brick shell, and the composite brick further comprises a dovetail inserting groove. The dovetail inserting grooves are formed in the left side and the right side of the composite brick shell respectively, two evenly-distributed dovetail inserting bases are inserted into each dovetail inserting groove, arc-shaped inserting grooves are formed in the upper side and the lower side of the composite brick shell, arc-shaped inserting bases are inserted into the arc-shaped inserting grooves, and the composite brick shell is a composite corundum brick shell; according to the submerged arc furnace wall composite brick, a plug-in alignment mode is adopted, so that piling among the submerged arc furnace wall composite bricks is guided in an auxiliary mode, the submerged arc furnace wall piling operation is convenient, external tools are not needed, meanwhile, the device is filled with the carbon aerogel blocks, and the carbon aerogel blocks are filled with the carbon aerogel blocks, so that the carbon aerogel blocks are not needed to be used, and the carbon aerogel blocks are not needed to be used. Therefore, the self weight of the composite brick is reduced while the self heat insulation performance of the submerged arc furnace wall is improved.

Description

Technical Field

[0001] This utility model relates to the field of electric arc furnace technology, specifically to composite bricks for electric arc furnace walls. Background Technology

[0002] Submerged arc furnaces, also known as electric arc furnaces or resistance furnaces, are mainly used for the reduction and smelting of ores, carbonaceous reducing agents, and solvents. They primarily produce ferrosilicon, ferromanganese, ferrochrome, ferrotungsten, and ferrosilicon-manganese alloys, which are important industrial raw materials in the metallurgical industry and chemical raw materials such as calcium carbide. The furnace walls are constructed using composite bricks. (Existing technology: Authorization Publication No. CN111424133) Patent A discloses a novel composite air-cooled durable ferrosilicon-manganese furnace, comprising a furnace wall and a furnace bottom. The furnace wall has a tapping hole positioned higher than the upper surface of the furnace bottom. This invention breaks with traditional tapping hole placement, utilizing the reserved constant-temperature molten iron below the tapping hole to increase the reduction temperature while simultaneously preventing the impact of excessive electrode insertion on the furnace bottom, thus protecting it. Clay bricks are used to prevent damage to carbon bricks during furnace drying. Carbon bricks are alternately interspersed with a novel composite grout, with a grout core layer inside the furnace wall. The high-temperature resistance and high strength of the grout improve the high-temperature resistance of both the furnace wall and the furnace bottom, thereby comprehensively improving the furnace's overall performance. The structural strength and leak-proof performance of the walls and furnace bottom extend the service life of the furnace body and have a high safety factor. It can be used in any furnace type with different parameters, especially for the conversion of calcium carbide furnaces and ferrosilicon furnaces into ferrosilicon alloy furnaces with smaller furnace parameters. It can effectively increase the furnace chamber and process size and improve economic indicators. However, when the furnace walls of this device are stacked, refractory bricks are used for stacking. The refractory brick structure is fixed and its outer surface is relatively flat. As a result, the construction personnel need to use auxiliary tools to align the connection positions between the refractory bricks when stacking the furnace walls. There is room for improvement in the operation. Therefore, we propose composite bricks for the furnace walls of electric arc furnaces. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide composite bricks for the furnace wall of a submerged arc furnace. The device adopts an interlocking alignment method to assist in guiding the stacking of composite bricks between the furnace walls, making the stacking operation of the furnace wall convenient and eliminating the need for external tools. At the same time, by filling carbon aerogel blocks, the device improves the heat insulation performance of the furnace wall itself while reducing the weight of the composite bricks, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a composite brick for the furnace wall of a submerged arc furnace, comprising a composite brick shell, wherein the interior of the composite brick shell is provided with an inner cavity, and also includes a dovetail slot;

[0005] Dovetail slots: These are respectively opened on the left and right sides of the composite brick shell. Each dovetail slot has two evenly distributed dovetail sockets inserted inside. Arc-shaped slots are opened on the top and bottom sides of the composite brick shell, and arc-shaped sockets are inserted inside each arc-shaped slot. This device uses an insertion and alignment method to assist in guiding the stacking of composite bricks in the submerged arc furnace wall, making the stacking operation of the submerged arc furnace wall convenient and eliminating the need for external tools. At the same time, by filling carbon aerogel blocks, the device improves the heat insulation performance of the submerged arc furnace wall itself while reducing the weight of the composite bricks.

[0006] Furthermore, the composite brick shell is a composite corundum brick shell, which improves the high-temperature resistance of the furnace wall itself.

[0007] Furthermore, both the dovetail socket and the arc socket have a ceramic coating on their outer sides to improve the structural stability of the furnace wall.

[0008] Furthermore, the composite brick shell is equipped with a steel reinforcement frame inside the wall to improve the structural stability of the blast furnace wall.

[0009] Furthermore, both the dovetail socket and the arc socket have an inner cavity II. Both inner cavities I and II are filled with carbon aerogel blocks, which improves the heat insulation performance of the furnace wall of the submerged arc furnace while reducing the weight of the composite brick itself.

[0010] Furthermore, both inner cavities one and two are vacuum environments, which keeps the carbon aerogel block in a vacuum environment and prevents it from oxidizing.

[0011] Furthermore, the joints between the composite bricks are filled with fine powder of high-alumina bauxite clinker to provide high-temperature protection for the gaps in the stacking of the composite bricks in the furnace wall of the submerged arc furnace.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This composite brick for the furnace wall of a submerged arc furnace has the following advantages:

[0013] 1. When using composite bricks for the furnace wall of an electric arc furnace, the stacking of composite bricks for the furnace wall is assisted by using dovetail slots, dovetail sockets, arc slots and arc sockets for alignment. This makes the stacking operation of the furnace wall convenient and does not require the use of external tools.

[0014] 2. When using composite bricks for the furnace wall of an electric arc furnace, carbon aerogel blocks are filled into the inner cavity, thereby improving the heat insulation performance of the furnace wall itself while reducing the weight of the composite bricks. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the disassembled structure of this utility model;

[0017] Figure 3 This is a cross-sectional view of the composite brick shell structure of this utility model.

[0018] In the diagram: 1. Composite brick shell, 2. Dovetail slot, 3. Dovetail socket, 4. Arc slot, 5. Arc socket, 6. Steel frame, 7. Carbon aerogel block. Detailed Implementation

[0019] 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.

[0020] Please see Figure 1-3 This embodiment provides a technical solution: a composite brick for the furnace wall of a submerged arc furnace, comprising a composite brick shell 1, with an inner cavity inside the composite brick shell 1. The composite brick shell 1 is a composite corundum brick shell, and a steel reinforcement frame 6 is provided inside the wall of the composite brick shell 1. The brick joints of the composite brick shell 1 are filled with high-alumina bauxite clinker powder. The high-alumina bauxite clinker powder is used to fill the gaps in the stacking of the composite bricks for the furnace wall of the submerged arc furnace. The high-alumina bauxite clinker powder is obtained by a series of processes such as crushing, grinding, and calcining of high-alumina bauxite ore. At high temperatures, the high-alumina bauxite clinker... The fine powder will not melt or soften, maintaining its strength and stability, thus providing high-temperature protection for the gaps in the composite bricks of the blast furnace wall. The composite corundum brick shell is a high-performance refractory material, mainly composed of corundum and other additives. It has the characteristics of high melting point, high hardness, high wear resistance, high slag resistance and corrosion resistance, which can improve the high-temperature resistance of the blast furnace wall itself. The structural strength of the composite bricks of the blast furnace wall is improved by the steel reinforcement frame 6, thereby improving the structural stability of the blast furnace wall. It also includes dovetail slots 2.

[0021] Dovetail slots 2: These are respectively opened on the left and right sides of the composite brick shell 1. Two evenly distributed dovetail sockets 3 are inserted into each dovetail slot 2. Arc-shaped slots 4 are opened on the upper and lower sides of the composite brick shell 1, and arc-shaped sockets 5 are inserted into each arc-shaped slot 4. When stacking composite bricks used for the walls of an electric arc furnace, to connect two horizontally adjacent composite bricks, the two composite bricks are aligned horizontally, and then a dovetail socket 3 is inserted from top to bottom into the dovetail slot 2 between the two horizontally aligned composite bricks. The dovetail socket 3 and the dovetail slot 2 limit the connection, thereby connecting and fixing the two horizontally adjacent composite bricks of the electric arc furnace wall. The lower end of the dovetail socket 3 is located in the middle of the dovetail slot 2 of the two horizontally adjacent composite bricks of the electric arc furnace wall. When connecting two vertically adjacent composite bricks of the electric arc furnace wall, the arc-shaped socket 5 is inserted into the lower side of the electric arc furnace wall. The upper arc-shaped slot 4 of the composite brick is inserted into the lower arc-shaped slot 4 of the upper ferroelectric furnace wall composite brick, and then the arc-shaped slot 4 of the lower side of the upper ferroelectric furnace wall composite brick is inserted into the upper arc-shaped socket 5. By simultaneously inserting one arc-shaped socket 5 into the arc-shaped slots 4 of the upper and lower composite bricks, the two vertically adjacent ferroelectric furnace wall composite bricks are connected, stacked and fixed. Then, the remaining ferroelectric furnace wall composite bricks are stacked, connected and fixed in sequence using the same principle. During the stacking of the ferroelectric furnace wall, the stacking of the ferroelectric furnace wall is ensured by limiting the insertion between each component. In this process, by inserting one dovetail socket 3 into four vertically adjacent dovetail slots 2, the horizontal stacking and fixing between four ferroelectric furnace wall composite bricks can be achieved by inserting one dovetail socket 3 into the four vertically adjacent dovetail slots 2. This device adopts the insertion alignment method to assist in guiding the stacking between the ferroelectric furnace wall composite bricks, making the stacking operation of the ferroelectric furnace wall convenient and without the need for external tools.

[0022] The dovetail socket 3 and the arc socket 5 are both coated with ceramic on their outer sides. Both the dovetail socket 3 and the arc socket 5 have an inner cavity. Both inner cavities contain carbon aerogel blocks 7. Both inner cavities are in a vacuum environment. The ceramic coating is applied to the outer sides of the dovetail socket 3 and the arc socket 5 to improve their high-temperature resistance, preventing the high-alumina bauxite clinker powder from falling off during the later use of the submerged arc furnace wall, which would otherwise cause significant high-temperature erosion at the wall joints. The inner cavities are filled with carbon aerogel blocks 7, which have a temperature resistance of up to 2000℃ under inert and vacuum conditions, and their temperature resistance after graphitization is also high. It can even reach 3000℃, and the carbon nanoparticles in the carbon aerogel itself have excellent absorption properties for infrared radiation, thus producing an effect similar to an infrared shielding agent. Therefore, its high-temperature thermal conductivity is low, thereby improving the thermal insulation performance of the blast furnace wall. At the same time, since the aerogel is generally more than 80% air, the weight of the composite bricks of the blast furnace wall is reduced, making it easier for construction workers to handle and stack them. By vacuuming the interior of inner cavity one and inner cavity two, the carbon aerogel block 7 is placed in a vacuum environment, preventing oxidation. This device improves the thermal insulation performance of the blast furnace wall while reducing the weight of the composite bricks by filling the carbon aerogel block 7.

[0023] The working principle of the composite bricks for the furnace wall of the electric arc furnace provided by this utility model is as follows: When stacking the composite bricks used for the furnace wall of the electric arc furnace, when connecting two horizontally adjacent composite bricks, the two composite bricks are aligned horizontally, and then a dovetail socket 3 is inserted from top to bottom into the dovetail slot 2 between the two horizontally adjacent composite bricks. Through the insertion and limiting of the dovetail socket 3 and the dovetail slot 2, the two horizontally adjacent composite bricks for the furnace wall are connected and fixed. The lower end of the dovetail socket 3 is located in the middle of the dovetail slot 2 of the two horizontally adjacent composite bricks for the furnace wall. When connecting two vertically adjacent composite bricks for the furnace wall, an arc-shaped socket 5 is inserted into the upper arc-shaped socket of the lower composite brick. In slot 4, the lower arc-shaped slot 4 of the upper composite brick of the electric arc furnace wall is then inserted into the upper part of the arc-shaped socket 5. By simultaneously inserting one arc-shaped socket 5 into the arc-shaped slots 4 of the upper and lower composite bricks, two vertically adjacent composite bricks of the electric arc furnace wall are connected and stacked for fixation. Then, the remaining composite bricks of the electric arc furnace wall are stacked and connected for fixation using the same principle. During the stacking process, the neatness of the electric arc furnace wall is ensured by limiting the insertion of each component. In this process, by inserting one dovetail socket 3 into four vertically adjacent dovetail slots 2, the horizontal stacking and fixation of four composite bricks of the electric arc furnace wall can be achieved. Subsequently, high-alumina bauxite clinker powder is used to fix the electric arc furnace wall. The gaps between the composite bricks in the furnace wall are filled with high-alumina bauxite clinker powder, which is produced from high-alumina bauxite ore through a series of crushing, grinding, and calcining processes. At high temperatures, the high-alumina bauxite clinker powder will not melt or soften, maintaining its strength and stability, thus providing high-temperature protection for the gaps between the composite bricks in the submerged arc furnace wall. The composite corundum brick shell is a high-performance refractory material, mainly composed of corundum and other additives. It features high melting point, high hardness, high wear resistance, high slag resistance, and corrosion resistance, improving the high-temperature resistance of the submerged arc furnace wall itself. A ceramic coating is applied to the outer surfaces of the dovetail socket 3 and the arc socket 5 to improve their high-temperature resistance and prevent subsequent damage. During the use of the submerged arc furnace wall, the shedding of fine powder from high-alumina bauxite clinker leads to significant high-temperature erosion at the wall joints. A steel reinforcement frame (6) enhances the structural strength of the composite bricks in the furnace wall, thereby improving its structural stability. The inner cavities one and two are filled with carbon aerogel blocks (7). These carbon aerogel blocks (7) exhibit a temperature resistance of up to 2000℃ under inert and vacuum conditions, and after graphitization, their temperature resistance can even reach 3000℃. Furthermore, the carbon nanoparticles in the carbon aerogel possess excellent infrared radiation absorption properties, producing an effect similar to an infrared shielding agent. Therefore, their high-temperature thermal conductivity is low, improving the thermal insulation performance of the furnace wall. Additionally, since aerogel is generally over 80% air...This results in a reduction in the weight of the composite bricks used in the submerged arc furnace walls, making them easier for construction workers to handle and stack. By vacuuming the interiors of inner cavities one and two, the carbon aerogel block 7 is kept in a vacuum environment, preventing oxidation.

[0024] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A composite brick for a wall of an electric arc furnace, comprising a composite brick shell (1), an inner cavity (2) being formed in the interior of the composite brick shell (1), characterized in that: Also include dovetail slot (2); Dovetail slot (2): it is respectively set up in the left and right sides of composite brick shell (1), the inside of dovetail slot (2) is inserted with two evenly distributed dovetail sockets (3), the upper and lower sides of composite brick shell (1) are all set up arc slot (4), the inside of arc slot (4) is all inserted with arc socket (5).

2. The wall composite brick for a submerged arc furnace according to claim 1, characterized in that: The composite brick shell (1) is a composite corundum brick shell.

3. The wall composite brick for a submerged arc furnace according to claim 1, characterized in that: The outer side of the dovetail socket (3) and arc socket (5) is provided with a ceramic coating.

4. The wall composite brick for a submerged arc furnace according to claim 1, characterized in that: The wall of the composite brick shell (1) is provided with a steel frame (6).

5. The wall composite brick for a submerged arc furnace according to claim 1, characterized in that: The inside of the dovetail socket (3) and arc socket (5) is provided with an inner cavity two, the inside of the inner cavity one and the inner cavity two is provided with a carbon aerogel block (7).

6. The wall composite brick for a submerged arc furnace according to claim 5, characterized in that: The inside of the inner cavity two and the inner cavity one is a vacuum environment.

7. The wall composite brick for a submerged arc furnace according to claim 1, characterized in that: The brick joint of the composite brick shell (1) is filled with high alumina bauxite clinker fine powder.

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