Aluminum reverberatory furnace bottom lining structure with bottom gas-permeable bricks

Abstract

The utility model discloses a kind of aluminium reverberatory furnace bottom lining body structure with furnace bottom air brick, it is related to aluminium reverberatory furnace technical field.The utility model includes furnace wall, furnace bottom body is arranged in furnace wall side;Air-permeable mechanism is arranged in furnace wall side, and the air-permeable mechanism includes the brick core of being arranged in furnace wall side, and sealant is bonded to the surface of the brick core.The utility model constructs working layer by using prefabricated block and on-site pouring mode, effectively avoids the irregular cracking problem of furnace lining caused by cold and hot alternation.Meanwhile, furnace bottom body and furnace wall are spliced using trapezoidal structure joint, and furnace wall is after furnace bottom body in construction sequence, so that after thermal expansion, the other is tightly extruded, significantly prevents aluminum liquid penetration, prolongs furnace lining service life, air brick is composed of core brick, seat brick, sealant, air-permeable chamber and air induction pipe, core brick is made of special aperture composite material, ensure that inert gas can pass through while aluminum liquid cannot penetrate.

Description

Technical Field

[0001] This utility model belongs to the field of aluminum reverberatory furnace technology, and in particular relates to a furnace bottom lining structure of an aluminum reverberatory furnace with permeable bricks at the furnace bottom. Background Technology

[0002] An aluminum reverberatory furnace is a piece of equipment used for smelting and melting aluminum and its alloys, commonly found in aluminum smelters or aluminum processing enterprises. During the aluminum casting process, in order to remove impurities such as gases from the molten aluminum, an inert gas such as argon or nitrogen is typically blown into the molten aluminum. As the gas rises, it combines with gases such as hydrogen in the molten aluminum and is then expelled, thus achieving a degassing effect.

[0003] The blowing method involves introducing nitrogen gas into the holding furnace through steel pipes. However, this method suffers from uneven degassing, long cycles, and potential contamination of the molten aluminum, affecting the quality of aluminum ingots. Existing furnace bottom lining structures with permeable bricks can effectively address these issues. However, molten aluminum has high fluidity and easily seeps out through the gaps in the permeable bricks and the furnace bottom lining, leading to a short lining lifespan and production risks. Therefore, we provide a furnace bottom lining structure for an aluminum reverberatory furnace with permeable bricks at the bottom to solve the aforementioned problems. Utility Model Content

[0004] The purpose of this utility model is to provide a furnace bottom lining structure for an aluminum reverberatory furnace with permeable bricks at the furnace bottom. Through the cooperation of the permeable mechanism and the refractory lining mechanism, the problem of easy leakage of molten aluminum in the furnace bottom lining structure in the prior art is solved.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0006] This utility model relates to a furnace bottom lining structure for an aluminum reverberatory furnace with permeable bottom bricks, comprising a furnace wall, a furnace bottom body on one side of the furnace wall, a permeable mechanism on one side of the furnace wall, the permeable mechanism comprising a brick core disposed on one side of the furnace wall, a sealant bonded to the surface of the brick core, a seat brick bonded to the surface of the sealant, an air inlet pipe connected to the bottom of the seat brick, and a permeable chamber opened at the bottom of the brick core; a refractory lining mechanism is disposed on the surface of the seat brick, the refractory lining mechanism comprising a steel plate disposed on the surface of the seat brick, an insulation layer installed on top of the steel plate, a seepage-proof layer installed on top of the insulation layer, and a working layer installed on top of the seepage-proof layer.

[0007] The present invention is further configured such that the air-permeable mechanism includes a control valve sleeved on the surface of the air-permeable tube, a pressure sensor fixedly connected to one side of the air-permeable tube, and a detection probe fixedly connected to one side of the pressure sensor.

[0008] The present invention is further configured such that the brick core is made of a composite material, which allows inert gas to pass through and prevents molten aluminum from penetrating.

[0009] The present invention is further configured such that the sealant is a sealant containing nano-alumina powder, which is used to prevent molten aluminum from seeping out from the gap between the brick core and the base brick.

[0010] The present invention is further configured such that the insulation layer is made of ceramic fiber board, and the seepage-proof layer is installed by compartmentalized casting.

[0011] The present invention is further configured such that the working layer is composed of a combination of precast blocks and castable refractory, which is used to improve thermal shock resistance and construction efficiency.

[0012] The present invention has the following beneficial effects.

[0013] 1. This utility model constructs the working layer using a combination of precast blocks and on-site casting, effectively avoiding irregular cracking of the furnace lining caused by alternating hot and cold temperatures. Simultaneously, a trapezoidal joint is used between the furnace bottom and the furnace wall, with the furnace wall constructed first, followed by the furnace bottom. This ensures that the two are tightly compressed after thermal expansion, significantly preventing aluminum molten metal penetration and extending the furnace lining's service life. The permeable brick consists of a core brick, a seat brick, sealant, a permeable chamber, and a gas inlet pipe. The core brick is made of a special pore size composite material, ensuring that inert gas can pass through while molten aluminum cannot. The seat brick protects the core brick, facilitating installation and replacement; damaged core bricks can be replaced individually, reducing maintenance costs and time. Each permeable brick is connected to an independent gas supply pipeline, equipped with a flow control valve and pressure sensor, allowing for real-time monitoring and adjustment of the gas supply to ensure uniform distribution of inert gas within the furnace and consistent degassing, thereby improving aluminum ingot quality.

[0014] 2. This utility model utilizes a precast block structure for the working layer, allowing for pre-casting and baking, resulting in quick on-site installation. Furthermore, the pre-baked precast blocks significantly shorten the overall furnace baking time, accelerating production. The furnace bottom lining structure, from bottom to top, consists of a steel plate, an insulation layer, a seepage-proof layer, and the working layer, with clear layers and defined functions. The seepage-proof layer employs a compartmentalized casting method to further enhance its seepage-proof effect; the insulation layer uses ceramic fiberboard or lightweight castable material, effectively reducing heat loss and improving thermal efficiency.

[0015] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0017] Figure 1This is a perspective view of the bottom lining structure of an aluminum reverberatory furnace with permeable bottom bricks.

[0018] Figure 2 This is a cross-sectional view of the working layer in the bottom lining structure of an aluminum reverberatory furnace with permeable bottom bricks.

[0019] Figure 3 This is a cross-sectional view of the seat brick in the bottom lining structure of an aluminum reverberatory furnace with permeable bottom bricks.

[0020] Figure 4 This is a cross-sectional view of the air intake pipe in the bottom lining structure of an aluminum reverberatory furnace with permeable bottom bricks.

[0021] In the attached diagram: 1. Furnace wall; 2. Furnace bottom body; 3. Ventilation mechanism; 31. Brick core; 32. Sealant; 33. Sealing brick; 34. Gas venting pipe; 35. Ventilation chamber; 36. Control valve; 37. Pressure sensor; 4. Refractory lining mechanism; 41. Steel plate; 42. Insulation layer; 43. Anti-seepage layer; 44. Working layer. Detailed Implementation

[0022] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments. Example

[0023] Please see Figures 1-4This utility model relates to a furnace bottom lining structure for an aluminum reverberatory furnace with permeable bottom bricks. It includes a furnace wall 1, a furnace bottom body 2 on one side of the furnace wall 1, and a trapezoidal joint between the furnace wall 1 and the furnace bottom body 2. The construction sequence is furnace wall 1 first, then furnace bottom body 2. Upon thermal expansion, the joint is tightly compressed, effectively preventing molten aluminum penetration. A permeable mechanism 3 is provided on one side of the furnace wall 1. The permeable mechanism 3 includes a brick core 31 on one side of the furnace wall 1 and sealant 32 bonded to the surface of the brick core 31. The seat brick 33 is attached to the surface of the sealant 32. The seat brick 33 fixes and protects the brick core 31, facilitating installation and replacement. When the permeable brick is damaged, the seat brick 33 and the internal brick core 31 can be replaced separately, making maintenance convenient. The air inlet pipe 34 connected to the bottom of the seat brick 33 introduces inert gas into the permeable system. Each permeable brick is connected to an independent air supply pipeline, equipped with a flow control valve 36 and a pressure sensor 37, which monitors and adjusts the air supply of each air supply pipeline in real time to ensure degassing in the furnace. The effect is uniform and consistent, achieving precise control. The permeable chamber 35 is opened at the bottom of the brick core 31. The permeable chamber 35 allows the gas to be evenly distributed here before entering the aluminum liquid through the brick core 31. The brick core 31, sealant 32, seat brick 33, permeable chamber 35 and gas inlet pipe 34 together form a permeable brick. The permeable bricks are installed in an alternating staggered structure. The number of permeable bricks installed is set according to the capacity of the reverberatory furnace and the ventilation power of the permeable bricks. The surface of the seat brick 33 is provided with a refractory lining mechanism 4. The permeable bricks and the refractory lining mechanism 4 together form the furnace bottom body 2. The refractory lining mechanism 4 is spliced ​​with trapezoidal joints. The refractory lining mechanism 4 includes a steel plate 41 set on the surface of the seat brick 33. The steel plate 41 serves as the base layer of the furnace bottom body 2 structure, providing mechanical support. It is usually a high-temperature resistant steel plate 41 to ensure the overall structural stability. An insulation layer 42 is installed on top of the steel plate 41, an anti-seepage layer 43 is installed on top of the insulation layer 42, and a working layer 44 is installed on top of the anti-seepage layer 43. Example

[0024] Please see Figures 1-4Based on Embodiment 1, the ventilation mechanism 3 further includes a control valve 36 sleeved on the surface of the air intake pipe 34, a pressure sensor 37 fixedly connected to one side of the air intake pipe 34, a detection probe fixedly connected to one side of the pressure sensor 37, the detection probe extending from one side of the pressure sensor 37 into the interior of the air intake pipe 34, and a fixed connection between the detection probe and the air intake pipe 34. The brick core 31 is made of composite material and is used to allow inert gas to pass through while preventing aluminum liquid from penetrating. As the core component of the gas channel, the brick core 31 allows inert gas to pass through while preventing aluminum liquid from entering. The composite material is designed with a special pore size to ensure uniform gas flow and prevent aluminum liquid from passing through. The sealant 32 is a sealant containing nano-alumina powder and is used to prevent aluminum liquid from entering through the gap between the brick core 31 and the seat brick 33. The sealant 32 fills the gap between the brick core 31 and the seat brick 33, providing high temperature resistance and good sealing. The insulation layer 42 is made of ceramic fiber board, which reduces heat loss and improves thermal efficiency. It can also be made of lightweight insulating castable material and installed on site. The anti-seepage layer 43 is installed by compartmentalized casting, which prevents aluminum liquid from seeping downwards and protects the insulation layer 42 and the steel structure. The structure is compact and has a good anti-seepage effect. The working layer 44 is composed of precast blocks and on-site castable material, which is used to improve thermal shock resistance and construction efficiency. The working layer 44 is in direct contact with aluminum liquid and is subject to high temperature and chemical corrosion. The precast blocks are made by pre-casting and baking, which can be quickly installed on the construction site. At the same time, due to pre-baking, it can be put into production after installation with a shorter baking time.

[0025] The working principle of this invention is as follows: During the operation of the aluminum reverberatory furnace, inert gas is introduced into the permeable chamber 35 through the gas inlet pipe 34. After being evenly distributed within the permeable chamber 35, the gas slowly and evenly permeates into the molten aluminum through the microporous channels of the core brick. During its ascent, the gas combines with impurities such as hydrogen in the molten aluminum and is discharged, achieving efficient degassing. At the same time, the special composite material structure of the core brick ensures that the molten aluminum cannot permeate in the reverse direction. The sealant 32 fills the gap between the core brick and the seat brick 33, further preventing molten aluminum leakage. The anti-seepage layer 43 and the trapezoidal structural seam design work together to effectively prevent molten aluminum from permeating downwards or into the furnace wall 1.

[0026] The various layers of the refractory lining 4 work together: the steel plate 41 provides mechanical support, the insulation layer 42 reduces heat loss, the anti-seepage layer 43 blocks the penetration of molten aluminum, and the working layer 44 directly withstands the high temperature and chemical corrosion of molten aluminum, ensuring the stability of the furnace structure and a long service life. Through the optimization of the above structure and process, while ensuring the degassing effect, the sealing performance, impermeability and service life of the furnace body are significantly improved. It is suitable for the modification and construction of the furnace bottom body lining structure of various aluminum reverberatory furnaces.

[0027] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A furnace bottom lining structure for an aluminum reverberatory furnace with permeable bricks at the furnace bottom, comprising a furnace wall (1), characterized in that: A furnace bottom body (2) is provided on one side of the furnace wall (1); A ventilation mechanism (3) is provided on one side of the furnace wall (1). The ventilation mechanism (3) includes a brick core (31) provided on one side of the furnace wall (1), a sealant (32) bonded to the surface of the brick core (31), a seat brick (33) bonded to the surface of the sealant (32), an air inlet pipe (34) connected to the bottom of the seat brick (33), and a ventilation chamber (35) opened at the bottom of the brick core (31). The surface of the seat brick (33) is provided with a fire-resistant lining mechanism (4), which includes a steel plate (41) disposed on the surface of the seat brick (33), an insulation layer (42) installed on the top of the steel plate (41), an anti-seepage layer (43) installed on the top of the insulation layer (42), and a working layer (44) installed on the top of the anti-seepage layer (43).

2. The furnace bottom lining structure of an aluminum reverberatory furnace with permeable bricks according to claim 1, characterized in that: The ventilation mechanism (3) also includes a control valve (36) sleeved on the surface of the air intake tube (34), a pressure sensor (37) fixedly connected to one side of the air intake tube (34), and a detection probe fixedly connected to one side of the pressure sensor (37).

3. The furnace bottom lining structure of an aluminum reverberatory furnace with permeable bricks according to claim 1, characterized in that: The brick core (31) is made of composite material to allow inert gas to pass through and prevent molten aluminum from penetrating.

4. The furnace bottom lining structure of an aluminum reverberatory furnace with permeable bricks according to claim 1, characterized in that: The sealant (32) is a sealant containing nano-alumina powder, used to prevent molten aluminum from seeping out from the gap between the brick core (31) and the seat brick (33).

5. The furnace bottom lining structure of an aluminum reverberatory furnace with permeable bricks according to claim 1, characterized in that: The insulation layer (42) is made of ceramic fiber board, and the impermeable layer (43) is installed by compartmentalized casting.

6. The furnace bottom lining structure of an aluminum reverberatory furnace with permeable bricks according to claim 1, characterized in that: The working layer (44) is composed of precast blocks and castable material, which is used to improve thermal shock resistance and construction efficiency.

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