Production system for extracting aluminum oxide by using aluminum ash

Abstract

The utility model discloses a production system for extracting aluminum oxide by using aluminum ash, which comprises a brick making unit, a calcining unit and a conveying unit, and the brick making unit is used for pressing aluminum oxide high-aluminum materials into green bricks; the calcining unit comprises a drying section, a pre-sintering section, a high-temperature sintering section and a cooling section which are sequentially arranged, the drying section is used for drying green bricks at the temperature of 300 DEG C, the pre-sintering section is used for heating the dried green bricks to the temperature of 1100 DEG C, the high-temperature sintering section is used for calcining the green bricks output by the pre-sintering section at the temperature of 1400 DEG C, and the cooling section is used for cooling the calcined green bricks to the temperature of 400-500 DEG C; the conveying unit comprises a plate pushing vehicle and a driving system, the plate pushing vehicle is used for bearing green bricks, and the driving system is used for driving the plate pushing vehicle to sequentially pass through the drying section, the pre-sintering section, the high-temperature sintering section and the cooling section. According to the production system for extracting the aluminum oxide by utilizing the aluminum ash, the purity of the aluminum oxide in the aluminum ash can be improved, the application range is expanded, and high-value application of the aluminum oxide in the aluminum ash is realized.

Description

Technical Field

[0001] This utility model relates to the technical field of aluminum ash treatment, and in particular to a production system for extracting alumina from aluminum ash. Background Technology

[0002] A large amount of aluminum ash is generated during the production of aluminum profiles through melting, casting, and electrolytic aluminum. The aluminum ash contains metallic aluminum, aluminum oxide, aluminum nitride, and other impurities, with a total aluminum oxide content of over 75%.

[0003] In the harmless treatment of aluminum ash, denitrification and impurity removal are often performed on the aluminum ash.

[0004] However, even after denitrification and impurity removal, high-alumina alumina still contains trace amounts of aluminum powder, aluminum nitride, carbon black, and other impurities. This results in a grayish-black appearance and low alumina purity, limiting the utilization of aluminum ash to low value and impacting its application range. Utility Model Content

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a production system for extracting alumina from aluminum ash, which can improve the purity of alumina in aluminum ash, expand its application range, and realize the high-value application of alumina in aluminum ash.

[0006] A production system for extracting alumina from aluminum ash according to an embodiment of the present invention includes:

[0007] The brick-making unit is used to press high-alumina alumina material into brick blanks;

[0008] The calcination unit includes a drying section, a pre-firing section, a high-temperature firing section, and a cooling section arranged sequentially. The drying section is used to dry the brick blanks at 300°C. The pre-firing section is used to heat the dried brick blanks to 1100°C. The high-temperature firing section is used to calcinate the brick blanks output from the pre-firing section at 1400°C. The cooling section is used to cool the calcined brick blanks to 400-500°C.

[0009] The conveying unit includes a pusher trolley and a drive system. The pusher trolley is used to carry brick blanks, and the drive system is used to drive the pusher trolley to pass sequentially through the drying section, the pre-firing section, the high-temperature firing section, and the cooling section.

[0010] A production system for extracting alumina from aluminum ash according to an embodiment of the present invention has at least the following beneficial effects:

[0011] 1. This utility model, by setting up a brick-making unit, is used to press high-alumina alumina material into brick blanks. This increases the density of the high-alumina alumina material, preventing the loose aluminum ash powder from easily accumulating into dense material or forming air gaps, which would lead to uneven heat transfer during calcination. This allows heat and gas to penetrate evenly during high-temperature calcination, avoiding local overheating or under-firing. On the other hand, by pressing the powdered aluminum ash into brick blanks, it prevents the aluminum ash from being blown away or falling during transportation and processing, thus avoiding environmental pollution.

[0012] 2. This utility model, by setting up a calcination unit, includes a drying section, a pre-firing section, a high-temperature firing section, and a cooling section arranged sequentially. The drying section is used to dry the brick blanks at 300℃, the pre-firing section is used to heat the dried brick blanks to 1100℃, the high-temperature firing section is used to calcine the brick blanks output from the pre-firing section at 1400℃, and the cooling section is used to cool the calcined brick blanks to 400-500℃. It can be understood that through a gradient heating process of 300℃ drying, 1100℃ pre-firing, and 1400℃ high-temperature firing, aluminum ash is achieved... The process involves the phased decomposition of organic matter and the transformation of alumina crystals, avoiding cracking of the brick blanks due to sudden heating and improving product purity. Simultaneously, calcining the brick blanks at 1400℃ oxidizes the trace gray metallic aluminum powder in the high-alumina alumina material into white alumina. The trace gray aluminum nitride reacts with oxygen at high temperature to generate alumina and nitrogen, thus turning white. The trace carbon black is burned at high temperature in an oxygen atmosphere to generate carbon dioxide, eliminating the gray-black color caused by carbon black in the high-alumina alumina material. Therefore, the purity of alumina in aluminum ash is improved, the application range is expanded, and the high-value application of alumina in aluminum ash is realized.

[0013] 3. By setting up a conveying unit, this utility model enables the pusher cart to work with the drive system to achieve automated conveying, which helps to improve conveying efficiency and reduce manual intervention.

[0014] According to some embodiments of the present invention, the drying section has a first exhaust port, the pre-firing section has a second exhaust port, and the high-temperature firing section has a third exhaust port. The first exhaust port is used to discharge water vapor and carbon dioxide from the drying section, the second exhaust port is used to discharge carbon dioxide from the pre-firing section, and the third exhaust port is used to discharge carbon dioxide and nitrogen from the high-temperature firing section.

[0015] The advantages of this invention are that by having a first exhaust port in the drying section, a second exhaust port in the pre-firing section, and a third exhaust port in the high-temperature firing section, the first exhaust port is used to discharge water vapor and carbon dioxide from the drying section, the second exhaust port is used to discharge carbon dioxide from the pre-firing section, and the third exhaust port is used to discharge carbon dioxide and nitrogen from the high-temperature firing section. This facilitates the discharge of gases from the drying section, the pre-firing section, and the high-temperature firing section, thus avoiding the disorderly emission of greenhouse gases.

[0016] According to some embodiments of the present invention, the calcination unit is provided with an integrated exhaust pipe, the bottom of which is connected to the first exhaust port, the second exhaust port and the third exhaust port, and the top of which has an outlet.

[0017] The advantages of this invention are: by setting an integrated exhaust pipe in the calcination unit, with the bottom of the integrated exhaust pipe connected to the first exhaust port, the second exhaust port and the third exhaust port, and the top of the integrated exhaust pipe having an outlet, it is convenient to centrally treat the exhaust gas discharged from the first exhaust port, the second exhaust port and the third exhaust port, simplify the pipeline layout and reduce equipment costs.

[0018] According to some embodiments of the present invention, the brick-making unit includes a brick press and a forming mold, the forming mold being disposed on the brick press, and the brick press being used to drive the forming mold to press alumina high-alumina material into brick blanks.

[0019] The advantages are: by including a brick-making unit including a brick press and a forming mold, with the forming mold set on the brick press, the brick press is used to drive the forming mold to press the alumina high-alumina material into brick blanks. Thus, on the one hand, the brick press and the forming mold can improve the brick-making efficiency, and on the other hand, by using the mold to form the brick blanks, the shape and density of the brick blanks can be made more uniform and stable.

[0020] According to some embodiments of the present invention, the forming mold has a forming cavity, and the forming cavity has at least two core pins, the at least two of the core pins being used to form holes in the brick blank.

[0021] The advantages of this invention are: by giving the molding die a molding cavity with at least two core pins inside the molding cavity, and using the at least two core pins to form holes in the brick blank, the specific surface area of ​​the brick blank can be increased, thereby shortening the calcination time, which is beneficial to improving efficiency and reducing fuel consumption.

[0022] According to some embodiments of the present invention, the calcination unit is characterized by having a guide rail that runs through the drying section, the pre-calcination section, the high-temperature calcination section, and the cooling section, and the guide rail is used to guide the pusher cart.

[0023] The advantage of this invention is that by setting a guide rail through the drying section, pre-firing section, high-temperature firing section and cooling section in the calcination unit, the guide rail is used to guide the pusher cart, thereby reducing the offset of the pusher cart in the calcination unit, and thus making the operation of the conveying unit more stable.

[0024] According to some embodiments of the present invention, the pusher cart includes a firing base plate and wheels disposed at the bottom of the firing base plate. The wheels roll on the guide rail, and the firing base plate is used to support the brick blanks.

[0025] The advantages of this invention are: by including a firing base plate and wheels at the bottom of the firing base plate in the pusher cart, the wheels roll on the guide rail, and the firing base plate is used to support the brick blanks. Thus, on the one hand, the pusher cart can move more smoothly by using the wheels to roll on the guide rail. On the other hand, by using the firing base plate to support the brick blanks, the firing base plate can withstand high temperatures and has good thermal conductivity, which is conducive to ensuring uniform heating of the contact surface between the brick blanks and the firing base plate.

[0026] According to some embodiments of the present invention, it is characterized by further including a crusher, which is used to crush the brick blanks output from the calcination unit into alumina particles.

[0027] The advantage of this invention is that by setting up a crusher, the brick blanks output from the calcination unit are crushed into alumina particles, which makes the granular alumina easier to process in subsequent steps and improves resource utilization.

[0028] According to some embodiments of the present invention, a wind-cooling unit is further provided between the cooling section and the crusher, the wind-cooling unit being used to cool the brick blanks output from the cooling section to room temperature.

[0029] The advantages of this invention are that an air-cooling unit is also provided between the cooling section and the crusher. The air-cooling unit is used to cool the brick blanks output from the cooling section to room temperature. Thus, on the one hand, the air-cooling unit quickly cools the brick blanks to room temperature, avoiding thermal damage to the crusher caused by high-temperature crushing. On the other hand, it prevents the residual heat from causing secondary oxidation of the material, ensuring the chemical stability of alumina.

[0030] According to some embodiments of the present invention, it is characterized by further including a ball mill, which is used to grind the alumina particles output by the crusher into alumina powder.

[0031] The advantages are: by setting up a ball mill, the alumina particles output from the crusher are ground into alumina powder. Thus, the ball mill refines the alumina particles into powder, which meets the particle size requirements of high-end applications. In addition, the powder form can improve the reactivity and facilitate subsequent deep processing or direct sales.

[0032] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of a production system for extracting alumina from aluminum ash according to an embodiment of the present invention.

[0035] Figure 2 for Figure 1 The diagram shows the structure of the brick pressing unit;

[0036] Figure 3 for Figure 1 The diagram shows the structure of the pusher cart.

[0037] Reference numerals: 100-Brick making unit, 110-Calcination unit, 120-Drying section, 130-Pre-firing section, 140-High temperature firing section, 150-Cooling section, 160-Conveying unit, 170-Push trolley, 180-Drive system, 190-First exhaust port, 200-Second exhaust port, 210-Third exhaust port, 220-Integrated exhaust pipe, 230-Brick press, 240-Molding mold, 250-Molding cavity, 260-Core pin, 270-Guide rail, 280-Firing base plate, 290-Wheel, 300-Crusher, 310-Air cooling unit, 320-Ball mill. Detailed Implementation

[0038] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0039] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" and "second" are mentioned, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation, connection, and linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] The following describes a production system for extracting alumina from aluminum ash according to an embodiment of the present invention, with reference to the accompanying drawings.

[0043] This invention aims to provide an embodiment of a production system for extracting alumina from aluminum ash.

[0044] Reference Figure 1 , Figure 2 and Figure 3 In this embodiment, a production system for extracting alumina from aluminum ash mainly includes a brick-making unit 100, a calcination unit 110, and a conveying unit 160.

[0045] For the brick-making unit 100, the brick-making unit 100 is used to press the high-alumina alumina material into brick blanks. In this way, on the one hand, the density of the high-alumina alumina material is increased, and the loose aluminum ash powder is prevented from easily accumulating into dense material or forming air gaps, which would lead to uneven heat transfer during calcination. This allows heat and gas to penetrate evenly during high-temperature calcination, avoiding local overheating or under-firing. On the other hand, by pressing the powdered aluminum ash into brick blanks, the aluminum ash can be prevented from being blown away or falling during the transportation and processing process, thus avoiding environmental pollution.

[0046] In some specific embodiments, the brick-making unit 100 includes a brick press 230 and a forming mold 240. The forming mold 240 is mounted on the brick press 230. The brick press 230 is used to drive the forming mold 240 to press the alumina high-alumina material into brick blanks. Thus, on the one hand, the brick press 230 and the forming mold 240 work together to improve brick-making efficiency. On the other hand, using the mold to form the brick blanks can make the shape and density of the brick blanks more uniform and stable.

[0047] Furthermore, the molding die 240 has a molding cavity 250, which contains at least two core pins 260. The at least two core pins 260 are used to form holes in the brick blank, thereby increasing the specific surface area of ​​the brick blank and shortening the calcination time, which is beneficial to improving efficiency and reducing fuel consumption.

[0048] For the calcination unit 110, the calcination unit 110 includes a drying section 120, a pre-firing section 130, a high-temperature firing section 140 and a cooling section 150 arranged in sequence. The drying section 120 is used to dry the brick blanks at 300°C. The pre-firing section 130 is used to heat the dried brick blanks to 1100°C. The high-temperature firing section 140 is used to calcinate the brick blanks output from the pre-firing section 130 at 1400°C. The cooling section 150 is used to cool the calcined brick blanks to 400-500°C.

[0049] Understandably, the gradient heating process of drying at 300℃, pre-firing at 1100℃, and high-temperature firing at 1400℃ achieves the staged decomposition of organic matter in aluminum ash and the transformation of alumina crystal form, avoiding cracking of the brick blank due to sudden heating and improving product purity. At the same time, calcining the brick blank at 1400℃ oxidizes the trace gray metallic aluminum powder in the high-alumina alumina material into white alumina. The trace gray aluminum nitride reacts with oxygen at high temperature to generate alumina and nitrogen, turning into white. The trace carbon black burns at high temperature in an oxygen atmosphere to generate carbon dioxide, eliminating the gray-black color caused by carbon black in the high-alumina alumina material. Thus, the purity of alumina in aluminum ash is improved, the application range is expanded, and the high-value application of alumina in aluminum ash is realized.

[0050] Specifically, the brick blanks are dried in the drying section at 120°C for 1.5-2 hours, pre-fired in the pre-firing section at 130°C for 3-4 hours, and calcined in the high-temperature firing section at 140°C for 1.5-2 hours.

[0051] In some specific embodiments, the drying section 120 has a first exhaust port 190, the pre-firing section 130 has a second exhaust port 200, and the high-temperature firing section 140 has a third exhaust port 210. The first exhaust port 190 is used to discharge water vapor and carbon dioxide from the drying section 120, the second exhaust port 200 is used to discharge carbon dioxide from the pre-firing section 130, and the third exhaust port 210 is used to discharge carbon dioxide and nitrogen from the high-temperature firing section 140. This facilitates the discharge of gases from the drying section 120, the pre-firing section 130, and the high-temperature firing section 140, thus avoiding the disorderly emission of greenhouse gases.

[0052] Furthermore, the calcination unit 110 is equipped with an integrated exhaust pipe 220. The bottom of the integrated exhaust pipe 220 is connected to the first exhaust port 190, the second exhaust port 200 and the third exhaust port 210, and the top of the integrated exhaust pipe 220 has an outlet. This facilitates the centralized treatment of the exhaust gas discharged from the first exhaust port 190, the second exhaust port 200 and the third exhaust port 210, simplifies the pipeline layout and reduces equipment costs.

[0053] In some specific embodiments, the calcination unit 110 is provided with a guide rail 270 that runs through the drying section 120, the pre-calcination section 130, the high-temperature calcination section 140 and the cooling section 150. The guide rail 270 is used to guide the pusher trolley 170, thereby reducing the offset of the pusher trolley 170 in the calcination unit 110, and thus making the operation of the conveying unit 160 more stable.

[0054] For the conveying unit 160, the conveying unit 160 includes a pusher trolley 170 and a drive system 180. The pusher trolley 170 is used to carry the brick blanks, and the drive system 180 is used to drive the pusher trolley 170 to pass through the drying section 120, the pre-firing section 130, the high-temperature firing section 140 and the cooling section 150 in sequence. Thus, the pusher trolley 170 and the drive system 180 can achieve automated conveying, which is beneficial to improving conveying efficiency and reducing manual intervention.

[0055] In some specific embodiments, the pusher trolley 170 includes a firing base plate 280 and wheels 290 disposed at the bottom of the firing base plate 280. The wheels 290 roll on the guide rail 270. The firing base plate 280 is used to support the brick blanks. Thus, on the one hand, the pusher trolley 170 can move more smoothly by using the wheels 290 to roll on the guide rail 270. On the other hand, the firing base plate 280 can support the brick blanks. The firing base plate 280 is resistant to high temperatures and has good thermal conductivity, which helps to ensure that the contact surface between the brick blanks and the firing base plate 280 is heated evenly.

[0056] In some specific embodiments, the drive system 180 can be configured as a hydraulic cylinder and a telescopic rod, with the hydraulic cylinder driving the telescopic rod to extend and retract so that the telescopic rod drives the pusher trolley 170 to move.

[0057] In other embodiments, the drive system 180 may be configured as a motor and a screw, with the screw threadedly connected to the pusher trolley 170, and the motor driving the screw to rotate so that the screw drives the pusher trolley 170 to move.

[0058] In some specific embodiments, a crusher 300 is also included, which is used to crush the brick blanks output from the calcination unit 110 into alumina particles, thereby making the granular alumina easier to process and improving resource utilization.

[0059] Furthermore, an air-cooling unit 310 is provided between the cooling section 150 and the crusher 300. The air-cooling unit 310 is used to cool the brick blanks output from the cooling section 150 to room temperature. Thus, on the one hand, the air-cooling unit 310 quickly cools the brick blanks to room temperature, avoiding high-temperature crushing that could cause thermal damage to the crusher 300. On the other hand, it prevents residual heat from causing secondary oxidation of the material, ensuring the chemical stability of alumina.

[0060] In some specific embodiments, a ball mill 320 is also included. The ball mill 320 is used to grind the alumina particles output from the crusher 300 into alumina powder. Thus, the ball mill 320 refines the alumina particles into powder to meet the particle size requirements of high-end applications. In addition, the powder form can improve the reactivity and facilitate subsequent deep processing or direct sales.

[0061] In the description of this specification, references to terms such as "an embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0062] The terms "first," "second," "third," "fourth," etc. (if applicable) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than that illustrated or described herein.

[0063] It should also be noted that, in the description of this specification, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0064] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may also include other steps or units that are not explicitly listed or that are inherent to such processes, methods, products, or apparatus.

[0065] Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0066] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A production system for extracting alumina from aluminum ash, characterized in that, include: A brick-making unit (100) is used to press alumina high-alumina material into brick blanks; The calcination unit (110) includes a drying section (120), a pre-firing section (130), a high-temperature firing section (140), and a cooling section (150) arranged sequentially. The drying section (120) is used to dry the brick blanks at 300°C. The pre-firing section (130) is used to heat the dried brick blanks to 1100°C. The high-temperature firing section (140) is used to calcine the brick blanks output from the pre-firing section (130) at 1400°C. The cooling section (150) is used to cool the calcined brick blanks to 400-500°C. The conveying unit (160) includes a pusher trolley (170) and a drive system (180). The pusher trolley (170) is used to carry brick blanks, and the drive system (180) is used to drive the pusher trolley (170) to pass through the drying section (120), the pre-firing section (130), the high-temperature firing section (140), and the cooling section (150) in sequence.

2. The production system for extracting alumina from aluminum ash according to claim 1, characterized in that, The drying section (120) has a first exhaust port (190), the pre-firing section (130) has a second exhaust port (200), and the high-temperature firing section (140) has a third exhaust port (210). The first exhaust port (190) is used to discharge water vapor and carbon dioxide from the drying section (120), the second exhaust port (200) is used to discharge carbon dioxide from the pre-firing section (130), and the third exhaust port (210) is used to discharge carbon dioxide and nitrogen from the high-temperature firing section (140).

3. The production system for extracting alumina from aluminum ash according to claim 2, characterized in that, The calcination unit (110) is provided with an integrated exhaust pipe (220), the bottom of which is connected to the first exhaust port (190), the second exhaust port (200) and the third exhaust port (210), and the top of which has an outlet.

4. The production system for extracting alumina from aluminum ash according to claim 1, characterized in that, The brick-making unit (100) includes a brick press (230) and a molding die (240). The molding die (240) is mounted on the brick press (230), and the brick press (230) is used to drive the molding die (240) to press alumina high-alumina material into brick blanks.

5. A production system for extracting alumina from aluminum ash according to claim 4, characterized in that, The forming mold (240) has a forming cavity (250) with at least two core pins (260) inside the forming cavity (250), the at least two of the core pins (260) being used to form holes in the brick blank.

6. The production system for extracting alumina from aluminum ash according to claim 1, characterized in that, The calcination unit (110) is provided with a guide rail (270) that runs through the drying section (120), the pre-calcination section (130), the high-temperature calcination section (140) and the cooling section (150), and the guide rail (270) is used to guide the pusher cart (170).

7. A production system for extracting alumina from aluminum ash according to claim 6, characterized in that, The pusher cart (170) includes a firing base plate (280) and wheels (290) disposed at the bottom of the firing base plate (280). The wheels (290) roll on the guide rail (270). The firing base plate (280) is used to support the brick blanks.

8. The production system for extracting alumina from aluminum ash according to claim 1, characterized in that, It also includes a crusher (300) for crushing the brick blanks output from the calcination unit (110) into alumina particles.

9. A production system for extracting alumina from aluminum ash according to claim 8, characterized in that, An air-cooling unit (310) is also provided between the cooling section (150) and the crusher (300). The air-cooling unit (310) is used to cool the brick blanks output by the cooling section (150) to room temperature.

10. A production system for extracting alumina from aluminum ash according to claim 8, characterized in that, It also includes a ball mill (320) for grinding the alumina particles output from the crusher (300) into alumina powder.

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