A communication flue of a carbon anode baking furnace

Abstract

This utility model discloses a connecting flue for a carbon anode calcining furnace, comprising heat-resistant bricks and a steel mesh. Connectors are installed on the front and rear sides of the heat-resistant bricks, and the steel mesh is installed inside the heat-resistant bricks in an embedded connection. Connecting hoops are installed around the connecting heads, and fixing posts are welded to the upper and lower sides of the connecting hoops. Compared with existing connecting flues, this connecting flue for a carbon anode calcining furnace uses heat-resistant bricks integrally cast from refractory material, with an internally embedded steel mesh to enhance structural strength. Four heat-resistant bricks are assembled into a four-way connecting flue unit through a special interlocking structure, with the connecting hoops on both sides interlocking and securing them, achieving modular, rapid installation and stable connection. Angle irons are nested behind the fixing posts and fitted onto the corners of the flue, and the outer frame and fixing plate form an integral reinforced frame through bolts. Ceramic fiber modules are compressed and slid into the flue, supported by elastic steel rings to fit the inner wall, improving insulation performance and facilitating maintenance and replacement.

Description

Technical Field

[0001] This utility model relates to the field of carbon anode baking furnace technology, specifically to a connecting fire channel for a carbon anode baking furnace. Background Technology

[0002] Carbon products can be categorized by their application into graphite electrodes, carbon blocks, graphite anodes, carbon electrodes, pastes, electro-carbon products, carbon fibers, special graphite, and graphite heat exchangers. Anode carbon blocks refer to carbon blocks produced using petroleum coke and pitch coke as aggregates and coal tar pitch as a binder, used as anode materials in prebaked aluminum electrolysis cells. These carbon blocks have been roasted and possess a stable geometric shape, hence they are also called prebaked anode carbon blocks, and are conventionally referred to as carbon anodes for aluminum electrolysis.

[0003] The existing side walls and connecting passages of carbon anode roasting furnaces are mainly constructed of refractory bricks and refractory mortar. Because the operation of the roasting furnace involves a rapid rise from low to high temperature and then a drop back down, uneven expansion during these processes causes cracks to form between the refractory bricks. Flames then burn into the feed bin through these cracks, leading to oxidation of the roasted carbon blocks. In severe cases, the refractory bricks may even break and collapse. Therefore, frequent repairs of the entire connecting passage are necessary. Cracks are repaired with refractory mortar, and broken refractory bricks need to be replaced. However, the top of the existing connecting passages is typically constructed using a monolithic on-site casting method, making dismantling, maintenance, and replacement difficult. Therefore, a new connecting passage design for carbon anode roasting furnaces is needed. Utility Model Content

[0004] The purpose of this invention is to provide a connecting fire channel for a carbon anode baking furnace to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a connecting flue for a carbon anode calcining furnace, comprising heat-resistant bricks and a steel mesh. Connectors are installed on the front and rear sides of the heat-resistant bricks, and the steel mesh is installed inside the heat-resistant bricks, with the steel mesh and the heat-resistant bricks being inlaid together. Connecting hoops are installed around the connecting hoops, and fixing columns are welded to the upper and lower sides of the connecting hoops. The heat-resistant bricks are bricks integrally cast using refractory materials, and the steel mesh is integrally cast and wrapped inside the heat-resistant bricks, thereby improving the structural strength of the heat-resistant bricks and preventing them from cracking due to temperature changes.

[0006] Furthermore, an insulation component is installed on the inner side of the heat-resistant brick, and the insulation component is slidably connected to the heat-resistant brick. The ceramic fiber module is an elastic material pre-pressed from zirconium-containing refractory ceramic fiber material.

[0007] Furthermore, the insulation component includes a ceramic fiber module and an elastic steel ring, and the elastic steel ring is installed inside the ceramic fiber module. After the ceramic fiber module is compressed, it slides into the connecting fire channel. The elasticity of the elastic steel ring will support the ceramic fiber module again and fit it into the interior of the connecting fire channel, which facilitates the quick installation of the ceramic fiber module and increases the insulation capacity of the connecting fire channel.

[0008] Furthermore, angle irons are installed around the periphery of the fixing column, and the angle irons are inlaid with the fixing column. The angle irons are nested into the fixing column, and the four angle irons are fitted onto the corners of the four-way connecting fire channel to protect the joints of the heat-resistant bricks and prevent damage.

[0009] Furthermore, an outer frame is installed around the angle iron, and the outer frame is slidably connected to the angle iron. The outer frame is fitted onto the outer periphery of the angle iron, and the bottom of the outer frame is nested with the fixing post below the connecting hoop. An outer frame is installed around the periphery of each set of connecting hoops.

[0010] Furthermore, bolts are installed on the upper left and right sides of the outer frame, and the bolts are threaded to the outer frame. The two ends of the fixing plate are fixed to the outer frame by the bolts, thereby wrapping and fixing the four-way connecting fire channel and improving the structural strength of the connecting fire channel.

[0011] Furthermore, a fixing plate is installed on the upper periphery of the bolt, and the fixing plate is threadedly connected to the bolt. The fixing plate is nested into the fixing post above the connecting hoop and aligned with the opening above the outer frame.

[0012] Compared with existing technologies, the advantages of this utility model are as follows: The heat-resistant bricks are integrally cast from refractory materials, with an internal steel mesh to enhance structural strength and prevent cracking due to temperature changes. Four heat-resistant bricks are assembled into a four-way interconnected fire channel unit through a special interlocking structure. After the connectors are pressed together, the connecting hoops on both sides are locked in an alternating overlapping manner, achieving modular, rapid installation and stable connection. Angle irons are nested in the fixing columns and fitted onto the corners of the fire channel. The outer frame and the fixing plate are bolted together to form an integral reinforced frame, which can be disassembled by reversing the operation. The ceramic fiber modules are compressed and slid into the fire channel, and are supported by elastic steel rings to fit the inner wall, which improves the heat insulation performance and facilitates maintenance and replacement. 1. The heat-resistant brick of this utility model is a brick integrally cast with refractory material. The steel mesh is integrally cast and wrapped inside the heat-resistant brick, which improves the structural strength of the heat-resistant brick and prevents it from cracking due to temperature changes. Four heat-resistant bricks are interlocked and connected to form a four-way interconnected fire channel through a specially designed structure. The joints of each four-way interconnected fire channel are pressed against each other. Two connecting hoops are embedded and clamped to the joints from the left and right sides. The joints of the two connecting hoops are staggered and superimposed to form a tighter and more stable connection. By repeating the above method, a four-way interconnected fire channel of sufficient length can be connected and installed. The modular installation method facilitates maintenance and replacement. 2. This utility model nests angle irons onto fixed posts, with four angle irons fitted onto the corners of the four-way connecting fire channels. An outer frame is then fitted over the angle irons, with the bottom of the outer frame nested with the fixed post below the connecting hoop. A fixing plate is then nested onto the fixed post above the connecting hoop, aligning with the opening on the top of the outer frame. Bolts are used to install and fix both ends of the fixing plate to the outer frame. Each set of connecting hoops is surrounded by an outer frame and a fixing plate, thus encasing and fixing the four-way connecting fire channels, improving the structural strength of the connecting fire channels. Reverse operation allows for quick disassembly, facilitating installation and maintenance. The ceramic fiber module is compressed and slid into the connecting fire channels. The elasticity of the elastic steel ring re-supports the ceramic fiber module, fitting it firmly into the interior of the connecting fire channels, facilitating quick installation of the ceramic fiber module and increasing the heat insulation capacity of the connecting fire channels. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the connecting fire channel of a carbon anode calcining furnace according to the present invention. Figure 2 This is a three-dimensional structural diagram of the connecting fire channel of a carbon anode calcining furnace according to the present invention. Figure 3 This is a three-dimensional cross-sectional view of the heat insulation component of the connecting fire channel of a carbon anode calcining furnace according to the present invention.

[0014] In the diagram: 1. Heat-resistant brick; 2. Steel mesh; 3. Connector; 4. Connecting hoop; 5. Fixing column; 6. Angle iron; 7. Outer frame; 8. Fixing plate; 9. Bolt; 10. Insulation component; 1001. Ceramic fiber module; 1002. Elastic steel ring. Detailed Implementation

[0015] like Figure 1 and Figure 2 As shown, a connecting flue of a carbon anode calcining furnace includes heat-resistant bricks 1 and steel mesh 2. Connectors 3 are installed on the front and rear sides of the heat-resistant bricks 1. The steel mesh 2 is installed inside the heat-resistant bricks 1 and is embedded in the heat-resistant bricks 1. Connecting hoops 4 are installed around the connecting hoops 3, and fixing posts 5 are welded to the upper and lower sides of the connecting hoops 4. The heat-resistant bricks 1 are made of high-purity refractory material and are integrally cast at high temperature. The high-strength steel mesh 2 is embedded inside as a reinforcing skeleton. This composite structure can effectively resist thermal stress impact and avoid brick cracking caused by sudden temperature changes. Four heat-resistant bricks 1 are interlocked by a precisely designed mortise and tenon structure to form a standardized four-way connecting flue unit. Adjacent units are axially positioned by the cooperation of the connecting hoops 3. The connecting hoops 4 adopt a split design. The left and right sides are engaged with the connecting hoops 3 through grooves, and the joints of the two connecting hoops 4 are staggered. This modular connection system supports unlimited extension assembly, which not only meets the needs of long-distance flue laying, but also allows for quick local replacement by disassembling individual connecting hoops 4. To enhance overall stability.

[0016] like Figure 1-3 As shown, an insulation component 10 is installed on the inner side of the heat-resistant brick 1, and the insulation component 10 is slidably connected to the heat-resistant brick 1. The insulation component 10 includes a ceramic fiber module 1001 and an elastic steel ring 1002, and the elastic steel ring 1002 is installed inside the ceramic fiber module 1001. An angle iron 6 is installed on the outer periphery of the fixing column 5, and the angle iron 6 is embeddedly connected to the fixing column 5. An outer frame 7 is installed on the outer periphery of the angle iron 6, and the outer frame 7 is slidably connected to the angle iron 6. Bolts 9 are installed on the upper left and right sides of the outer frame 7, and the bolts 9 are threadedly connected to the outer frame 7. A fixing plate 8 is installed on the upper periphery of the bolt 9, and the fixing plate 8 is threadedly connected to the bolt 9. The angle iron 6 and the fixing column 5 form a nest, and the four angle irons 6 are precisely fitted at a 45° angle to the corner protrusions of the four-way connecting fire channel. The outer frame 7 is made of heat-resistant alloy steel plate bent into shape. Its U-shaped cross section forms a three-dimensional constraint with the angle iron 6, and the bottom is fitted with the fixing column 5 below the connecting hoop 4 through an opening. After the fixing plate 8 is inserted into the fixing post 5 above the connecting hoop 4, it is aligned with the opening at the top of the outer frame 7. Bolts 9 are used for connection and fixation. Each set of connecting hoop 4 is equipped with a standardized outer frame 7 and fixing plate 8 assembly. This modular design ensures structural strength while supporting quick assembly and disassembly. The ceramic fiber module 1001 is compressed to 1 / 3 of its original volume. After being slid into the fire channel, the elastic steel ring 1002, made of shape memory alloy, automatically recovers its shape above 80°C, creating uniform contact pressure between the module and the inner wall. Its multi-layered composite structure reduces the temperature of the outer surface of the fire channel.

[0017] Working Principle: When using the connecting flue of this carbon anode baking furnace, firstly, the heat-resistant brick 1 is made of high-alumina refractory material and integrally cast at high temperature. An internally embedded heat-resistant steel mesh 2 forms a reinforcing skeleton. This composite structure significantly improves the thermal shock resistance of the brick, effectively preventing cracking damage caused by sudden temperature changes. Four heat-resistant bricks 1 are interlocked through a precisely designed mortise and tenon structure. The connector 3 adopts a conical surface fit design, combined with the slotted snap-fit ​​structure of the connecting hoop 4, making the connection between adjacent flue units both firm and easy to disassemble and assemble. The connecting hoop 4 adopts a split design, with staggered overlaps at its joints, ensuring both sealing and enhanced overall stability. The modular assembly system supports unlimited extension of the flue and allows for quick partial replacement by disassembling individual connecting hoop 4s. The angle iron 6 is made of hot-dip galvanized steel and is inserted and fitted onto the corners of the flue via fixing posts 5. The outer frame 7 is made of weather-resistant steel plate bent into shape. Its bottom is inserted into the fixed column 5, and the top opening is rigidly constrained by the fixed plate 8 through high-strength bolts 9. The ceramic fiber module 1001 is compressed to 1 / 3 of its original volume. After being pushed into the fire channel, the elastic steel ring 1002 made of heat-resistant alloy automatically recovers its shape after being heated, so that the module and the inner wall form a uniform contact pressure. Its multi-layer composite structure can significantly improve the heat preservation performance of the fire channel.

Claims

1. A connecting flue of a carbon anode calcining furnace, comprising heat-resistant bricks (1) and steel mesh (2), characterized in that, Connectors (3) are installed on the front and rear sides of the heat-resistant brick (1). The steel mesh (2) is installed inside the heat-resistant brick (1) and the steel mesh (2) is embedded in the heat-resistant brick (1). Connecting hoops (4) are installed around the connectors (3), and fixing posts (5) are welded on the upper and lower sides of the connecting hoops (4).

2. The connecting flue of a carbon anode baking furnace according to claim 1, characterized in that, The heat-resistant brick (1) is equipped with a heat-insulating component (10) on its inner side, and the heat-insulating component (10) and the heat-resistant brick (1) are slidably connected.

3. The connecting fire channel of a carbon anode baking furnace according to claim 2, characterized in that, The thermal insulation component (10) includes a ceramic fiber module (1001) and an elastic steel ring (1002), and the elastic steel ring (1002) is installed inside the ceramic fiber module (1001).

4. The connecting fire channel of a carbon anode baking furnace according to claim 1, characterized in that, Angle iron (6) is installed on the periphery of the fixed column (5), and the angle iron (6) and the fixed column (5) are connected by an inlay.

5. The connecting fire channel of a carbon anode baking furnace according to claim 4, characterized in that, An outer frame (7) is installed around the angle iron (6), and the outer frame (7) and the angle iron (6) are slidably connected.

6. The connecting fire channel of a carbon anode baking furnace according to claim 5, characterized in that, Bolts (9) are installed on the upper left and right sides of the outer frame (7), and the bolts (9) are threaded to the outer frame (7).

7. The connecting fire channel of a carbon anode baking furnace according to claim 6, characterized in that, A fixing plate (8) is installed on the outer periphery of the upper section of the bolt (9), and the fixing plate (8) and the bolt (9) are threaded together.

Images