A production line for producing calcium aluminate using aluminum ash

Abstract

This utility model discloses a production line for producing calcium aluminate using aluminum ash, comprising a mixer, a first ball mill, a brick press, a tunnel kiln, and a conveying mechanism. The mixer is used to mix high-alumina alumina and calcium carbonate; the first ball mill is used to grind the mixture after mixing into a mixed powder; the brick press is used to press the mixed powder ground by the first ball mill into brick blanks; the tunnel kiln is used to calcine the brick blanks and includes a drying kiln chamber, a pre-firing kiln chamber, a calcining kiln chamber, and a cooling kiln chamber arranged sequentially; the conveying mechanism includes a material carrier and a drive assembly. The material carrier is used to carry the brick blanks, and the drive assembly is used to drive the material carrier sequentially through the drying kiln chamber, the pre-firing kiln chamber, the calcining kiln chamber, and the cooling kiln chamber. This utility model's production line for producing calcium aluminate using aluminum ash can reduce the impurity content of calcium aluminate, meet the requirements for the use of calcium aluminate in the water purification agent industry, and is conducive to its widespread application in the water purification agent industry, thus expanding the application range of aluminum ash.

Description

Technical Field

[0001] This utility model relates to the technical field of aluminum ash treatment, and in particular to a production line for producing calcium aluminate using aluminum ash. Background Technology

[0002] A large amount of hazardous waste, aluminum ash, is generated during the production of aluminum profiles through smelting, casting, and electrolytic aluminum. Aluminum ash contains metallic aluminum, aluminum oxide, aluminum nitride, and other impurities.

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

[0004] Aluminum ash, after denitrification and impurity removal, contains alumina and trace amounts of aluminum powder, aluminum nitride, and carbon black.

[0005] Calcium aluminate powder is a raw material used in the water purification agent industry. Calcium aluminate is an inorganic compound formed by sintering calcium oxide and aluminum oxide at high temperature. Currently, some water purification agent manufacturers use aluminum ash as a raw material to produce calcium aluminate powder.

[0006] Currently, the method for producing calcium aluminate from aluminum ash is to directly calcine a mixture of aluminum ash and calcium carbonate at high temperature.

[0007] However, the existing production methods for producing calcium aluminate using aluminum ash result in calcium aluminate with high impurity content, making it difficult to widely apply in the water purification agent industry and limiting the application scope of aluminum ash. Utility Model Content

[0008] 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 line for producing calcium aluminate using aluminum ash, which can reduce the impurity content of calcium aluminate, meet the requirements for use of calcium aluminate in the water purification agent industry, facilitate its widespread application in the water purification agent industry, and expand the application scope of aluminum ash.

[0009] A production line for producing calcium aluminate using aluminum ash according to an embodiment of the present invention includes:

[0010] A mixer is used to mix aluminum ash with high-alumina alumina material and calcium carbonate after denitrification and impurity removal.

[0011] The first ball mill is used to grind the mixture stirred by the mixer into a mixed powder.

[0012] A brick press is used to press the mixed powder ground by the first ball mill into brick blanks.

[0013] A tunnel kiln for firing brick blanks includes a drying kiln chamber, a pre-firing kiln chamber, a calcining kiln chamber, and a cooling kiln chamber arranged in sequence. The temperature of the drying kiln chamber is set to 300±10℃, the temperature of the pre-firing kiln chamber is set to 1200±10℃, the temperature of the calcining kiln chamber is set to 1450±10℃, and the temperature of the cooling kiln chamber is set to 400±10℃.

[0014] The conveying mechanism includes a material carrier and a drive assembly. The material carrier is used to carry brick blanks, and the drive assembly is used to drive the material carrier to pass sequentially through the drying kiln, the pre-firing kiln, the calcining kiln, and the cooling kiln, and to keep the material carrier in the drying kiln for 1.5-2 hours, in the pre-firing kiln for 3-4 hours, and in the calcining kiln for 1.5-3 hours.

[0015] A production line for producing calcium aluminate using aluminum ash according to an embodiment of the present invention has at least the following beneficial effects:

[0016] 1. This utility model uses a mixer to mix aluminum ash with high-alumina alumina material after denitrification and impurity removal and calcium carbonate. It can be understood that the high-alumina alumina material after denitrification and impurity removal can reduce the content of impurities such as ammonia nitrogen, which is beneficial to reducing the impurities in the final calcium aluminate, thereby improving the purity of calcium aluminate.

[0017] 2. This utility model incorporates a brick press, which presses the mixed powder ground by the first ball mill into brick blanks. This improves the density of the mixed powder, preventing it from becoming loose and easily accumulating into dense or air gaps, which could lead to uneven heating during calcination. It also ensures that heat and gas can penetrate evenly during high-temperature calcination, preventing local overheating or under-firing. Furthermore, by pressing the mixed powder into brick blanks, it prevents the mixed powder from being blown away or falling during transportation and processing, thus avoiding environmental pollution.

[0018] 3. This utility model incorporates a tunnel kiln for firing brick blanks. The tunnel kiln includes a drying chamber, a pre-firing chamber, a calcining chamber, and a cooling chamber arranged sequentially. The temperature of the drying chamber is set at 300±10℃, the pre-firing chamber at 1200±10℃, the calcining chamber at 1450±10℃, and the cooling chamber at 400±10℃. It can be understood that the tunnel kiln heats the brick blanks in a stepped, segmented manner through the drying, pre-firing, and calcining chambers, allowing the brick blanks to be heated within different temperature ranges. The process decomposes impurities in the environment, causing trace amounts of gray metallic aluminum powder to oxidize into white alumina. Trace amounts of gray aluminum nitride react with oxygen at high temperatures to produce alumina and nitrogen, turning white. Trace amounts of carbon black burn at high temperatures in an oxygen atmosphere to produce carbon dioxide. This causes the alumina in the high-alumina material to undergo a phase transition with calcium carbonate during high-temperature calcination, producing white calcium aluminate. This process helps reduce the impurity content of calcium aluminate, improves its purity, meets the requirements for use in the water purification agent industry, and facilitates its widespread application in the water purification agent industry, thus expanding the application range of aluminum ash.

[0019] 4. This utility model, by setting up a conveying mechanism, includes a material carrier and a drive assembly. The material carrier is used to carry the brick blanks, and the drive assembly is used to drive the material carrier to pass through the drying kiln, the pre-firing kiln, the calcining kiln, and the cooling kiln in sequence. The material carrier stays in the drying kiln for 1.5-2 hours, in the pre-firing kiln for 3-4 hours, and in the calcining kiln for 1.5-3 hours. It can be understood that the conveying mechanism drives the brick blanks to stay in the drying kiln for 1.5-2 hours, in the pre-firing kiln for 3-4 hours, and in the calcining kiln for 1.5-3 hours. This allows the brick blanks sufficient time in the drying kiln, pre-firing kiln, and calcining kiln to decompose impurities and allow alumina and calcium carbonate to undergo phase conversion to form calcium aluminate. This is beneficial to improving the purity and quality of calcium aluminate.

[0020] According to some embodiments of this utility model, exhaust ports are respectively provided on the top of the drying kiln chamber, the top of the pre-firing kiln chamber, and the top of the calcining kiln chamber, and the three exhaust ports are respectively used to discharge the gas from the drying kiln chamber, the pre-firing kiln chamber, and the calcining kiln chamber.

[0021] The advantage of this invention is that by setting exhaust ports at the top of the drying kiln, the pre-firing kiln, and the calcining kiln respectively, the three exhaust ports are used to discharge the gas in the drying kiln, the pre-firing kiln, and the calcining kiln respectively. This facilitates the timely removal of the gas generated in the drying kiln, the pre-firing kiln, and the calcining kiln by the brick blanks, and avoids the inability of the gas in the tunnel kiln to be discharged.

[0022] According to some embodiments of the present invention, the top of the tunnel kiln is also provided with an exhaust pipe, the bottom of the exhaust pipe is connected to three exhaust ports, and the top of the exhaust pipe has an air outlet.

[0023] The advantage of this invention is that by providing an exhaust pipe at the top of the tunnel kiln, with three exhaust ports connected to the bottom of the exhaust pipe and an outlet at the top, it is convenient to concentrate and discharge or collect the gas discharged from the three exhaust ports, thereby simplifying the exhaust system of the tunnel kiln.

[0024] According to some embodiments of the present invention, the tunnel kiln is further provided with a guide rail, which sequentially passes through the drying kiln chamber, the pre-firing kiln chamber, the calcining kiln chamber and the cooling kiln chamber, and the guide rail is used to guide the movement of the material carrier.

[0025] The advantages of this invention are that by also setting a guide rail in the tunnel kiln, the guide rail passes through the drying kiln chamber, the pre-firing kiln chamber, the calcining kiln chamber and the cooling kiln chamber in sequence. The guide rail is used to guide the movement of the material cart, thereby making the movement path of the material cart in the tunnel kiln more stable and avoiding the material cart from passing through the tunnel kiln outside the set route, which would affect the calcination effect of the brick blank or cause multiple material carts in the tunnel kiln to collide.

[0026] According to some embodiments of the present invention, it further includes a first metering feeder and a second metering feeder, the first metering feeder and the second metering feeder being used to meter and feed alumina high-alumina material and calcium carbonate into the mixer, respectively.

[0027] The advantages of this invention are: by setting up a first metering feeder and a second metering feeder, which are used to meter and input alumina high-alumina material and calcium carbonate into the mixer respectively, the alumina high-alumina material and calcium carbonate are automatically metered, eliminating the need for manual metering. This makes the ratio of alumina high-alumina material and calcium carbonate more accurate, and at the same time, it is convenient to adjust the ratio of alumina high-alumina material and calcium carbonate.

[0028] According to some embodiments of the present invention, a first lifting conveyor and a raw material silo are further provided between the first ball mill and the brick press. The lower end of the first lifting conveyor is connected to the discharge port of the first ball mill, and the upper end of the first lifting conveyor is connected to the raw material silo. The raw material silo is used to store the mixed powder output by the first ball mill and to supply it to the brick press.

[0029] The advantages of this invention are: by further configuring a first lifting conveyor and a raw material silo between the first ball mill and the brick press, the lower end of the first lifting conveyor is connected to the discharge port of the first ball mill, and the upper end of the first lifting conveyor is connected to the raw material silo. The raw material silo is used to store the mixed powder output from the first ball mill and to supply it to the brick press. It can be understood that, on the one hand, the raw material silo, as an intermediate storage silo between the first ball mill and the brick press, can coordinate the different production rhythms of the first ball mill and the brick press, avoiding insufficient or excessive feeding of the first ball mill. On the other hand, the first lifting conveyor transports the mixed powder upward to the raw material silo, so that the raw material silo can supply the brick press from a high position. Thus, the mixed powder in the raw material silo can roll down into the brick press by its own gravity, simplifying the feeding structure from the raw material silo to the brick press.

[0030] According to some embodiments of the present invention, a crusher is also included, which is used to crush the brick blanks output from the tunnel kiln into calcium aluminate particles.

[0031] The advantage of this invention is that by setting up a crusher, which is used to crush the brick blanks output from the tunnel kiln into calcium aluminate particles, it can be understood that using a crusher to crush the brick blank-shaped calcium aluminate into granular calcium aluminate can reduce the unit volume of calcium aluminate, thereby facilitating subsequent transportation, further processing or use.

[0032] According to some embodiments of this utility model, a blower is also provided between the discharge end of the cooling kiln chamber and the crusher, and the blower is used to cool the brick blanks by air.

[0033] The advantage of this invention is that a blower is also installed between the discharge end of the cooling kiln chamber and the crusher. The blower is used to cool the brick blanks by blowing air. Thus, by using the blower to cool the brick blanks, the brick blanks can be cooled down to room temperature quickly, thereby avoiding damage to the crusher due to excessively high brick blank temperatures.

[0034] According to some embodiments of the present invention, a second ball mill is also included, which is used to grind the particles output from the crusher into calcium aluminate powder.

[0035] The advantages are: by setting up a second ball mill, the particles output from the crusher are ground into calcium aluminate powder, so that the finished calcium aluminate is in powder form, which can 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.

[0036] According to some embodiments of the present invention, the discharge end of the second ball mill is provided with a second lifting conveyor and a finished product bin, the lower end of the second lifting conveyor is connected to the discharge end of the second ball mill, and the upper end of the second lifting conveyor is connected to the finished product bin.

[0037] The advantages of this invention are that by setting a second lifting conveyor and a finished product silo at the discharge end of the second ball mill, the lower end of the second lifting conveyor is connected to the discharge end of the second ball mill, and the upper end of the second lifting conveyor is connected to the finished product silo. Thus, on the one hand, it is convenient to store the finished calcium aluminate powder, and on the other hand, the finished product silo is located at a high position, which facilitates the supply of calcium aluminate powder to the next process for packaging.

[0038] 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

[0039] 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.

[0040] Figure 1 This is a schematic diagram of a production line for producing calcium aluminate using aluminum ash, according to an embodiment of the present invention.

[0041] Figure 2 for Figure 1 The diagram shown illustrates the structure of the mixer.

[0042] Figure 3 for Figure 1 The diagram shows the structure of the first lifting conveyor.

[0043] Reference numerals: 100-mixer, 110-first ball mill, 120-brick press, 130-tunnel kiln, 140-drying kiln chamber, 150-pre-firing kiln chamber, 160-calcining kiln chamber, 170-cooling kiln chamber, 180-conveying mechanism, 190-carrying car, 200-drive assembly, 210-exhaust port, 220-exhaust pipe, 230-air outlet, 240-guide rail, 250-first metering conveyor, 260-second metering conveyor, 270-first lifting conveyor, 280-raw material bin, 290-crusher, 300-blower, 310-second ball mill, 320-second lifting conveyor, 330-finished product bin. Detailed Implementation

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] The following describes, with reference to the accompanying drawings, a production line for producing calcium aluminate using aluminum ash according to an embodiment of the present invention.

[0049] Reference Figure 1 , Figure 2 and Figure 3 The present invention aims to provide an embodiment of a production line for producing calcium aluminate using aluminum ash.

[0050] In this embodiment, a production line for producing calcium aluminate using aluminum ash mainly includes a mixer 100, a first ball mill 110, a brick press 120, a tunnel kiln 130, and a conveying mechanism 180.

[0051] For mixer 100, mixer 100 is used to mix and stir aluminum ash, after denitrification and impurity removal, alumina high-alumina material and calcium carbonate.

[0052] Understandably, the high-alumina alumina material obtained after denitrification and impurity removal can reduce the content of impurities such as ammonia nitrogen, which is beneficial to reducing the impurities in the final calcium aluminate, thereby improving the purity of calcium aluminate.

[0053] In some specific embodiments, a first metering feeder 250 and a second metering feeder 260 are also included. The first metering feeder 250 and the second metering feeder 260 are respectively used to meter and input alumina high-alumina material and calcium carbonate into the mixer 100, thereby facilitating the automatic metering of alumina high-alumina material and calcium carbonate, eliminating the need for manual metering, and thus making the ratio of alumina high-alumina material and calcium carbonate more accurate. At the same time, it is convenient to adjust the ratio of alumina high-alumina material and calcium carbonate.

[0054] The first ball mill 110 is used to grind the mixture after being stirred by the mixer 100 into a mixed powder.

[0055] The brick press 120 is used to press the mixed powder ground by the first ball mill 110 into brick blanks. In this way, on the one hand, it can increase the density of the mixed powder, avoid the mixed powder being loose and easy to accumulate and form air gaps, which would lead to uneven heating of the mixed powder during calcination, and allow heat and gas to penetrate evenly during high-temperature calcination, avoiding local overheating or under-firing. On the other hand, by pressing the mixed powder into brick blanks, it can prevent the mixed powder from being blown away or falling during the conveying and processing process, thus avoiding environmental pollution.

[0056] Specifically, the brick press 120 is equipped with a mold for forming brick blanks, and the mold is equipped with at least two core pins for forming air holes on the brick blanks.

[0057] In some specific embodiments, a first lifting conveyor 270 and a raw material silo 280 are also provided between the first ball mill 110 and the brick press 120. The lower end of the first lifting conveyor 270 is connected to the discharge port of the first ball mill 110, and the upper end of the first lifting conveyor 270 is connected to the raw material silo 280. The raw material silo 280 is used to store the mixed powder output by the first ball mill 110 and supply it to the brick press 120.

[0058] Understandably, on the one hand, the raw material silo 280, as an intermediate storage silo between the first ball mill 110 and the brick press 120, can coordinate the different production rhythms of the first ball mill 110 and the brick press 120, avoiding insufficient or excessive material supply to the first ball mill 110. On the other hand, the first lifting conveyor 270 conveys the mixed powder upward to the raw material silo 280, enabling the raw material silo 280 to supply material to the brick press 120 from a high position. This facilitates the mixed powder in the raw material silo 280 to roll down into the brick press 120 by its own gravity, simplifying the feeding structure from the raw material silo 280 to the brick press 120.

[0059] Specifically, the first lifting conveyor 270 can be configured as a bucket elevator, thereby facilitating continuous feeding.

[0060] Furthermore, the first lifting conveyor 270 includes a body extending from bottom to top, a conveyor belt disposed within the body, and multiple hoppers disposed on the conveyor belt. The bottom of the body has a feed inlet, and the top of the body has a discharge outlet. After the mixed powder enters the hopper within the body through the feed inlet, the conveyor belt drives the hopper to lift. When the hopper is lifted to the discharge outlet, the conveyor belt drives the hopper to flip, causing the mixed powder in the hopper to discharge from the discharge outlet. Then, the conveyor belt drives the hopper to descend back to the feed inlet so that the hopper can be reloaded and lifted again.

[0061] For tunnel kiln 130, which is used to calcine brick blanks, tunnel kiln 130 includes a drying kiln chamber 140, a pre-firing kiln chamber 150, a calcining kiln chamber 160 and a cooling kiln chamber 170 arranged in sequence. The temperature of drying kiln chamber 140 is set to 300±10℃, the temperature of pre-firing kiln chamber 150 is set to 1200±10℃, the temperature of calcining kiln chamber 160 is set to 1450±10℃, and the temperature of cooling kiln chamber 170 is set to 400±10℃.

[0062] It is understandable that the tunnel kiln 130 heats the brick blanks in a stepped, segmented manner through the drying kiln chamber 140, the pre-firing kiln chamber 150, and the calcining kiln chamber 160. This allows the brick blanks to decompose impurities in different temperature environments, causing trace amounts of gray metallic aluminum powder to oxidize into white alumina. Trace amounts of gray aluminum nitride react with oxygen at high temperatures to generate alumina and nitrogen, turning into white. Trace amounts of carbon black burn at high temperatures in an oxygen atmosphere to generate carbon dioxide. This causes the alumina in the high-alumina material to undergo a phase transition with calcium carbonate during high-temperature calcination, generating white calcium aluminate. This helps to reduce the impurity content of calcium aluminate, improve the purity of calcium aluminate, meet the requirements for use in the water purification agent industry, and facilitate its widespread application in the water purification agent industry, thus expanding the application range of aluminum ash.

[0063] In some specific embodiments, exhaust ports 210 are respectively provided on the top of the drying kiln 140, the top of the pre-firing kiln 150, and the top of the calcining kiln 160. The three exhaust ports 210 are used to discharge the gas in the drying kiln 140, the pre-firing kiln 150, and the calcining kiln 160, thereby facilitating the timely removal of the gas generated in the drying kiln 140, the pre-firing kiln 150, and the calcining kiln 160, and preventing the gas in the tunnel kiln 130 from being unable to be discharged.

[0064] Furthermore, the top of the tunnel kiln 130 is also provided with an exhaust pipe 220, the bottom of which is connected to three exhaust ports 210, and the top of the exhaust pipe 220 has an outlet 230. This facilitates the centralized discharge or collection of the gas discharged from the three exhaust ports 210, thereby simplifying the exhaust system of the tunnel kiln 130.

[0065] The conveying mechanism 180 includes a loading cart 190 and a drive assembly 200. The loading cart 190 carries the brick blanks, and the drive assembly 200 drives the loading cart 190 to pass sequentially through the drying kiln 140, the pre-firing kiln 150, the calcining kiln 160, and the cooling kiln 170. The loading cart 190 stays in the drying kiln 140 for 1.5-2 hours, in the pre-firing kiln 150 for 3-4 hours, and in the calcining kiln 160 for 1.5-3 hours. This allows the brick blanks sufficient time in the drying kiln 140, the pre-firing kiln 150, and the calcining kiln 160 to decompose impurities and to allow alumina and calcium carbonate to undergo phase conversion to form calcium aluminate, thereby improving the purity and quality of calcium aluminate.

[0066] In some specific embodiments, the tunnel kiln 130 is also provided with a guide rail 240, which passes through the drying kiln chamber 140, the pre-firing kiln chamber 150, the calcining kiln chamber 160 and the cooling kiln chamber 170 in sequence. The guide rail 240 is used to guide the movement of the material carrier 190, thereby making the movement path of the material carrier 190 in the tunnel kiln 130 more stable and avoiding the material carrier 190 from not passing through the tunnel kiln 130 according to the set route, which would affect the calcination effect of the brick blanks or cause multiple material carriers 190 in the tunnel kiln 130 to collide.

[0067] In some specific embodiments, a crusher 290 is also included, which is used to crush the brick blanks output from the tunnel kiln 130 into calcium aluminate particles.

[0068] Understandably, using a crusher 290 to crush brick-shaped calcium aluminate into granular calcium aluminate can reduce the unit volume of calcium aluminate, thereby facilitating subsequent transportation, further processing, or use.

[0069] Furthermore, a blower 300 is installed between the discharge end of the cooling kiln chamber 170 and the crusher 290. The blower 300 is used to cool the brick blanks by blowing air. Thus, by using the blower 300 to cool the brick blanks by blowing air, the brick blanks can be cooled down to room temperature quickly, thereby preventing the brick blanks entering the crusher 290 from being damaged due to excessively high temperature.

[0070] In some specific embodiments, a second ball mill 310 is also included, which is used to grind the particles output from the crusher 290 into calcium aluminate powder, so that the finished calcium aluminate product is in powder form, which can 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.

[0071] In some specific embodiments, the discharge end of the second ball mill 310 is provided with a second lifting conveyor and a finished product silo 330. The lower end of the second lifting conveyor is connected to the discharge end of the second ball mill 310, and the upper end of the second lifting conveyor is connected to the finished product silo 330. Thus, on the one hand, it is convenient to store the finished calcium aluminate powder, and on the other hand, the finished product silo 330 is located at a high position, which facilitates the supply of calcium aluminate powder for the next process of packaging.

[0072] Specifically, the second lifting conveyor can be configured as a bucket elevator, thereby facilitating continuous feeding.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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 line for producing calcium aluminate using aluminum ash, characterized in that, include: A mixer (100) is used to mix and stir aluminum ash with high-alumina alumina material and calcium carbonate after denitrification and impurity removal; A first ball mill (110) is used to grind the mixture after being stirred by the mixer (100) into a mixed powder. A brick press (120) is used to press the mixed powder ground by the first ball mill (110) into brick blanks; A tunnel kiln (130) for calcining brick blanks includes a drying kiln chamber (140), a pre-firing kiln chamber (150), a calcining kiln chamber (160), and a cooling kiln chamber (170) arranged sequentially. The temperature of the drying kiln chamber (140) is set to 300±10℃, the temperature of the pre-firing kiln chamber (150) is set to 1200±10℃, the temperature of the calcining kiln chamber (160) is set to 1450±10℃, and the temperature of the cooling kiln chamber (170) is set to 400±10℃. The conveying mechanism (180) includes a material carrier (190) and a drive assembly (200). The material carrier (190) is used to carry brick blanks, and the drive assembly (200) is used to drive the material carrier (190) to pass sequentially through the drying kiln (140), the pre-firing kiln (150), the calcining kiln (160), and the cooling kiln (170), and to make the material carrier (190) stay in the drying kiln (140) for 1.5-2 hours, in the pre-firing kiln (150) for 3-4 hours, and in the calcining kiln (160) for 1.5-3 hours.

2. The production line for producing calcium aluminate using aluminum ash according to claim 1, characterized in that, The top of the drying kiln (140), the top of the pre-firing kiln (150), and the top of the calcining kiln (160) are respectively provided with exhaust ports (210), and the three exhaust ports (210) are used to discharge the gas from the drying kiln (140), the pre-firing kiln (150), and the calcining kiln (160).

3. The production line for producing calcium aluminate using aluminum ash according to claim 2, characterized in that, The top of the tunnel kiln (130) is also provided with an exhaust pipe (220), the bottom of which is connected to three exhaust ports (210), and the top of the exhaust pipe (220) has an air outlet (230).

4. The production line for producing calcium aluminate using aluminum ash according to claim 1, characterized in that, The tunnel kiln (130) is also provided with a guide rail (240), which passes through the drying kiln chamber (140), the pre-firing kiln chamber (150), the calcining kiln chamber (160) and the cooling kiln chamber (170) in sequence. The guide rail (240) is used to guide the movement of the material carrier (190).

5. A production line for producing calcium aluminate using aluminum ash according to claim 1, characterized in that, It also includes a first metering feeder (250) and a second metering feeder (260), which are used to meter and feed alumina high-alumina material and calcium carbonate into the mixer (100), respectively.

6. The production line for producing calcium aluminate using aluminum ash according to claim 1, characterized in that, A first lifting conveyor (270) and a raw material silo (280) are also provided between the first ball mill (110) and the brick press (120). The lower end of the first lifting conveyor (270) is connected to the discharge port of the first ball mill (110), and the upper end of the first lifting conveyor (270) is connected to the raw material silo (280). The raw material silo (280) is used to store the mixed powder output by the first ball mill (110) and supply it to the brick press (120).

7. The production line for producing calcium aluminate using aluminum ash according to claim 1, characterized in that, It also includes a crusher (290) for crushing the brick blanks output from the tunnel kiln (130) into calcium aluminate particles.

8. A production line for producing calcium aluminate from aluminum ash according to claim 7, characterized in that, A blower (300) is also provided between the discharge end of the cooling kiln chamber (170) and the crusher (290), and the blower (300) is used to cool the brick blanks by air.

9. A production line for producing calcium aluminate from aluminum ash according to claim 7, characterized in that, It also includes a second ball mill (310) for grinding the particles output from the crusher (290) into calcium aluminate powder.

10. A production line for producing calcium aluminate from aluminum ash according to claim 9, characterized in that, The discharge end of the second ball mill (310) is provided with a second lifting conveyor and a finished product silo (330). The lower end of the second lifting conveyor is connected to the discharge end of the second ball mill (310), and the upper end of the second lifting conveyor is connected to the finished product silo (330).

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