Device and method for resource utilization of aluminum dust collection ash

Abstract

The invention provides a device and method for resource utilization of collected aluminum dust, the device comprises a bin body, a screen is arranged in the middle of the bin body, the interior of the bin body is divided into a bag breaking sealing bin located on the upper side and a buffering bin located on the lower side through the screen, and a bag breaking cutter is further arranged on the screen; the inner wall of the bin body is further provided with a vibrator used for driving the screen in a vibrating mode, the lower side of the buffering bin is provided with a first conveying device, the discharging end of the first conveying device is further provided with a spiral pump, the discharging end of the first conveying device is further provided with a weighing and metering system, and the spiral pump is further connected with a second conveying device. The other end of the second conveying device is connected with a material spraying opening of the combustor through a material and air mixing channel. According to the device and the method for resource utilization of the aluminum dust collection ash, efficient and safe treatment of the aluminum dust collection ash can be realized, and comprehensive recovery and resource reutilization of valuable metals (such as aluminum, magnesium, calcium and the like) in the aluminum dust collection ash can be realized.

Description

Technical Field

[0001] This invention belongs to the field of aluminum processing dust collection technology, and specifically relates to an apparatus and method for resource utilization of aluminum dust. Background Technology

[0002] Aluminum dust, also known as 034 aluminum ash (hazardous waste number 321-034-48), is classified as hazardous solid waste. It is a type of fly ash collected primarily in dust collection systems in industries such as aluminum smelting and aluminum electrolysis. Aluminum dust contains oxides of calcium, magnesium, aluminum, and silicon, as well as large amounts of salts, volatile organic compounds, and small amounts of heavy metals. It possesses hazardous properties such as corrosivity and reactivity, and is one of the most challenging aspects of environmental disposal at the end of the aluminum smelting process.

[0003] Currently, aluminum ash collection companies typically collect aluminum dust at a rate of less than 5%, mixing it with ordinary 026 or 024 aluminum ash at a ratio of approximately 1:20. This mixing method not only results in a small processing capacity but also makes it difficult to achieve uniform mixing due to the low density of the aluminum dust, leading to difficulties in controlling subsequent processes. Furthermore, the large amount of flying dust can easily cause equipment corrosion and personnel safety accidents. In short, it fails to fundamentally achieve the goal of resource utilization. Summary of the Invention

[0004] In view of this, the present invention addresses the shortcomings of the prior art by providing an apparatus and method for the resource utilization of aluminum dust, which can not only achieve efficient and safe treatment of aluminum dust, but also realize the comprehensive recovery and resource reuse of valuable metals (such as aluminum, magnesium, calcium, etc.) therein.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a device for resource utilization of aluminum dust collection, including a silo body, a screen is provided in the middle of the silo body, the interior of the silo body is divided into a bag-breaking and sealing silo on the upper side and a buffer silo on the lower side by the screen, a bag-breaking knife is also provided on the screen, a vibrator for driving the screen vibration is also provided on the inner wall of the silo body, a first conveying device is provided on the lower side of the buffer silo, a screw pump is also provided at the discharge end of the first conveying device, a weighing and metering system is also provided at the discharge end of the first conveying device, the screw pump is also connected to a second conveying device, and the other end of the second conveying device is connected to the burner spray port through a material-air mixing channel.

[0006] As a further improvement of the present invention, the first conveying device is an in-warehouse screw conveyor; the second conveying device is a dilute phase pneumatic conveying device.

[0007] As a further improvement of the present invention, the burner nozzle is set on an 8-meter platform and corresponds to the high-temperature zone of the kiln head.

[0008] As a further improvement of the present invention, the screen has a detachable structure, is made of wear-resistant stainless steel, and has a hole diameter of 5-10mm. It is used to intercept unbroken or clumped aluminum ash packaging materials and prevent them from entering the buffer chamber.

[0009] As a further improvement of the present invention, a negative pressure dust suction port is provided at the top of the bag breaking and sealing chamber. The negative pressure dust suction port is connected to a dust removal device through a pipe to collect the dust generated during the bag breaking process, thereby achieving dust-free operation.

[0010] As a further improvement of the present invention, the weighing and metering system includes a dynamic weighing sensor and a PLC control module, which can monitor the amount of aluminum dust conveyed per unit time in real time and feed the data back to the central control system to realize automatic adjustment of the conveying speed to ensure the mixing accuracy.

[0011] As a further improvement of the present invention, the screw pump is a variable frequency speed control screw pump, whose speed is dynamically adjusted by the central control system according to the rotary kiln operating parameters and the aluminum dust mixing ratio to ensure continuous, uniform and controllable material supply.

[0012] As a further improvement of the present invention, the working air source of the dilute phase pneumatic conveying equipment comes from the clean compressed air of the kiln tail waste heat recovery system, realizing the cascade utilization of energy and reducing system energy consumption.

[0013] A method for resource-based utilization of aluminum dust collection ash includes the following steps: S1. Determine the blending ratio of aluminum dust based on the alumina content of the current batch of 026 aluminum ash. S2. The packaging bag containing aluminum dust is transferred to the bag breaking and sealing chamber by a forklift. During the fall, the packaging bag will be automatically cut by the bag breaking knife, so that the aluminum dust falls into the bag breaking and sealing chamber. S3. Driven by the vibrator, the screen vibrates periodically, which helps the material pass through the screen smoothly into the buffer chamber below, while intercepting impurities that are not completely broken or clumped together. S4. The screw conveyor inside the silo continuously transports the aluminum dust from the buffer silo to the discharge end, and the weighing and metering system dynamically weighs the material and feeds back the flow data to the PLC control module in real time. S5. Based on the deviation between the set mixing ratio and the actual flow rate, the central control system adjusts the speed of the variable frequency speed-regulating screw pump to achieve precise material feeding. S6. The spiral pump evenly feeds the material into the dilute phase pneumatic conveying equipment. Using clean compressed air from the waste heat recovery system at the kiln tail, the aluminum dust is transported to the burner inlet on the 8-meter platform through the material-air mixing channel. In the high-temperature area of ​​the rotary kiln head, the aluminum dust is evenly sprayed into the kiln through the spray nozzle, quickly dispersed and fully mixed with the high-temperature airflow and materials to participate in the calcination process. S7. Utilize the calorific value of the combustible components contained in the aluminum dust itself to assist combustion, monitor the temperature changes of the rotary kiln firing section in real time, dynamically adjust the main fuel supply and auxiliary air volume, reduce natural gas consumption, and improve energy utilization efficiency. S8. Optimize combustion conditions through the burner's temperature and airflow regulation device to improve combustion completeness and reduce unburned carbon residue and the generation of harmful gases such as NOx and CO. S9. After roasting, the material enters the cooling system as the kiln rotates, completing the clinker preparation; the flue gas is then treated sequentially through the settling chamber, pulse bag filter, and desulfurization and denitrification device before being discharged in compliance with standards.

[0014] In the method for resource utilization of aluminum dust, in step S1, the blending ratio of aluminum dust is determined based on the real-time measurement results of the chemical composition of 026 aluminum dust fed from the kiln tail: when the alumina content is ≥80%, aluminum dust is blended at a ratio of 5%; when the alumina content is 70%-80%, aluminum dust is blended at a ratio of 2%; when the alumina content is ≤70%, blending is stopped; the chemical composition of 026 aluminum dust is detected every 30 minutes by an online X-ray fluorescence analyzer, and the detection data is automatically uploaded to the central control system for real-time adjustment of the conveying parameters of aluminum dust.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: Firstly, conventional aluminum ash mainly extracts metallic aluminum and alumina from aluminum, and achieves resource utilization through a series of physicochemical transformations. However, aluminum dust has extremely low effective alumina and metallic aluminum content, making it difficult to utilize from a chemical composition perspective. This invention, from a resource utilization perspective, utilizes the calorific value of aluminum dust to reduce energy costs. It also solves the problem of uneven mixing of aluminum dust by uniformly spraying the material through a burner.

[0016] Secondly, by combining a detachable wear-resistant stainless steel screen with a bag-breaking blade, this invention achieves automatic bag breaking and efficient interception of impurities in aluminum dust collection packaging bags, effectively preventing clumped materials or unbroken bags from entering the subsequent conveying system, ensuring the continuity and stability of the entire resource utilization process, and significantly reducing equipment blockage and failure rates.

[0017] Third, the top of the bag-breaking and sealing chamber is equipped with a negative pressure dust suction port and connected to a pulse bag dust collector, which can collect the dust generated during the bag breaking process in real time, realize dust-free operation, greatly improve the working environment, reduce secondary pollution, and meet the requirements of green production and occupational health and safety.

[0018] Fourth, the weighing and metering system combines dynamic weighing sensors and PLC control modules to achieve real-time monitoring and feedback control of the aluminum dust conveying volume. In conjunction with the variable frequency speed-regulating screw pump, it dynamically adjusts the feeding speed according to the operating status of the rotary kiln, ensuring that the blending ratio is accurate and controllable, and improving the stability of the calcination process and the consistency of clinker quality.

[0019] Fifth, the use of dilute phase pneumatic conveying and the use of clean compressed air from the kiln tail waste heat recovery system as the working air source not only realizes the cascade utilization of energy and reduces dependence on external air sources, but also avoids material moisture and environmental pollution during the conveying process, thereby improving the overall energy efficiency and environmental protection level of the system.

[0020] Sixth, aluminum dust is sprayed into the high-temperature zone of the rotary kiln head, where its own combustible components participate in combustion, replacing part of the natural gas consumption. After optimization of combustion conditions, the amount of main fuel used can be effectively reduced, carbon emissions can be reduced, and the generation of harmful gases such as NOx and CO can be suppressed by adjusting the air volume and combustion temperature, thus achieving the dual goals of energy conservation, emission reduction and clean production.

[0021] Seventh, this method integrates an X-ray fluorescence analyzer, a weighing system, a variable frequency pump, and a burner control device into a central control system to build a fully intelligent control system. This enables closed-loop management from raw material composition detection to feeding control, significantly improving the level of automation and operational accuracy, and is suitable for large-scale industrial continuous operation. Attached Figure Description

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] Figure 1 This is a front view structural diagram of the present invention; Figure 2 This is a side view of the structure of the present invention.

[0024] In the diagram: 101. Bin body; 102. Screen; 103. Bag-breaking and sealing bin; 104. Buffer bin; 105. Bag-breaking knife; 106. Vibrator; 107. In-bin screw conveyor; 108. Dilute phase pneumatic conveying equipment; 109. Screw pump; 110. Material-air mixing channel; 111. Dust removal device; 112. Packaging bag; 113. Support leg. Detailed Implementation

[0025] To better understand the present invention, the following embodiments further illustrate the content of the invention, but the scope of protection of the present invention is not limited to the following embodiments. Numerous specific details are set forth in the following description to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details.

[0026] like Figure 1 , 2 As shown, a device for resource-based aluminum dust collection includes a silo body 101. Support legs 113 are provided at the bottom of the silo body 101. A screen 102 is provided in the middle of the silo body 101. The interior of the silo body 101 is divided by the screen 102 into an upper bag-breaking and sealing silo 103 and a lower buffer silo 104. A bag-breaking knife 105 is also provided on the screen 102. A vibrator 106 for driving the vibration of the screen 102 is also provided on the inner wall of the silo body 101. A first conveying device is provided at the lower side of the buffer silo 104. A screw pump 109 is provided at the discharge end of the first conveying device, and a weighing system is also provided at the discharge end of the first conveying device. The screw pump 109 is also connected to a second conveying device. The other end of the second conveying device is connected to the burner nozzle through a material-air mixing channel 110. The vertical cross-section of the buffer silo 104 is trapezoidal, which allows for more efficient material conveying.

[0027] The vibrator 106 adopts an electromagnetic vibration mechanism with a vibration frequency of 40-60Hz and adjustable amplitude to prevent the screen 102 from clogging and ensure continuous and stable feeding.

[0028] The first conveying device is an in-warehouse screw conveyor 107; the second conveying device is a dilute phase pneumatic conveying device 108.

[0029] The burner nozzle is located on an 8-meter platform, corresponding to the high-temperature zone at the kiln head.

[0030] The screen 102 is a detachable structure made of wear-resistant stainless steel with a mesh size of 5-10mm. It is used to intercept unbroken or clumped aluminum ash packaging materials to prevent them from entering the buffer chamber 104.

[0031] The top of the bag-breaking and sealing chamber 103 is equipped with a negative pressure dust suction port, which is connected to the dust removal device 111 through a pipe to collect the dust generated during the bag-breaking process and achieve dust-free operation.

[0032] The weighing and metering system includes dynamic weighing sensors and a PLC control module, which can monitor the amount of aluminum dust conveyed per unit time in real time and feed the data back to the central control system to automatically adjust the conveying speed to ensure blending accuracy.

[0033] The screw pump 109 is a variable frequency speed control screw pump 109. Its speed is dynamically adjusted by the central control system according to the rotary kiln operating parameters and the aluminum dust mixing ratio to ensure continuous, uniform and controllable material supply.

[0034] The working air source of the dilute phase pneumatic conveying equipment 108 comes from the clean compressed air of the kiln tail waste heat recovery system, realizing the cascade utilization of energy and reducing system energy consumption.

[0035] A method for resource-based utilization of aluminum dust collection ash includes the following steps: S1. Determine the blending ratio of aluminum dust based on the alumina content of the current batch of 026 aluminum ash. S2. The packaging bag 112 containing aluminum dust is transferred to the bag breaking and sealing chamber 103 by a forklift. During the falling process, the packaging bag 112 will be automatically cut by the bag breaking knife 105, so that the aluminum dust falls into the bag breaking and sealing chamber 103. S3. Driven by the vibrator 106, the screen 102 generates periodic vibration, which promotes the material to pass smoothly through the screen 102 and enter the buffer chamber 104 below, while intercepting impurities that are not completely broken or clumped. S4. The screw conveyor 107 inside the silo continuously transports the aluminum dust from the buffer silo 104 to the discharge end, and performs dynamic weighing through the weighing and metering system, feeding back the flow data to the PLC control module in real time. S5. Based on the deviation between the set mixing ratio and the actual flow rate, the central control system adjusts the speed of the variable frequency speed-regulating screw pump 109 to achieve precise material supply. S6 and spiral pump 109 uniformly feed the material into the dilute phase pneumatic conveying equipment 108. Using clean compressed air from the waste heat recovery system at the kiln tail, the aluminum dust is conveyed to the burner inlet on the 8-meter platform through the material-air mixing channel 110. In the high-temperature zone of the rotary kiln head, the aluminum dust is uniformly sprayed into the kiln through the spray nozzle, quickly dispersed, and fully mixed with the high-temperature airflow and materials to participate in the calcination process. The central control system uses a fuzzy PID algorithm to automatically adjust the fuel and air volume ratio based on the data from the infrared thermometer in the rotary kiln firing zone and the analysis results of the flue gas oxygen content, maintaining the optimal calcination temperature range (1350℃~1450℃) to ensure product quality stability. S7. Utilize the calorific value of the combustible components contained in the aluminum dust itself to assist combustion, monitor the temperature changes of the rotary kiln firing section in real time, dynamically adjust the main fuel supply and auxiliary air volume, reduce natural gas consumption, and improve energy utilization efficiency. S8. Optimize combustion conditions through the burner's temperature and airflow regulation device to improve combustion completeness and reduce unburned carbon residue and the generation of harmful gases such as NOx and CO. S9. After roasting, the material enters the cooling system as the kiln rotates, completing the clinker preparation; the flue gas is then treated sequentially through the settling chamber, pulse bag filter, and desulfurization and denitrification device before being discharged in compliance with standards.

[0036] In the method for resource utilization of aluminum dust, in step S1, the blending ratio of aluminum dust is determined based on the real-time measurement results of the chemical composition of 026 aluminum dust fed from the kiln tail: when the alumina content is ≥80%, aluminum dust is blended at a ratio of 5%; when the alumina content is 70%-80%, aluminum dust is blended at a ratio of 2%; when the alumina content is ≤70%, blending is stopped; the chemical composition of 026 aluminum dust is detected every 30 minutes by an online X-ray fluorescence analyzer, and the detection data is automatically uploaded to the central control system for real-time adjustment of the conveying parameters of aluminum dust.

[0037] The workflow of the device and method for resource utilization of aluminum dust collection is as follows: Raw material preparation and feeding: The packaging bag 112 containing aluminum dust is transferred to the inlet of the bag breaking and sealing chamber 103 by a forklift; the packaging bag 112 falls freely under the action of gravity, and passes through the bag breaking knife 105 fixed on the screen 102 to realize automatic cutting and breaking of the bag, so that the powdery material inside is released into the bag breaking and sealing chamber 103.

[0038] Screening and vibration assist in feeding, with aluminum dust from broken bags falling onto the centrally located screen 102. An electromagnetic vibrator 106 activates, periodically vibrating the screen 102 at a frequency of 40–60 Hz. The amplitude is adjustable, effectively preventing screen clogging and promoting the smooth passage of fine powder through the screen 102 into the lower buffer chamber 104. Impurities that are not completely broken or have clumps are intercepted by the 5–10 mm diameter wear-resistant stainless steel screen 102, preventing them from entering subsequent systems and causing equipment malfunctions.

[0039] In the conveying and dynamic metering process, the aluminum dust collected in the buffer silo 104 is continuously conveyed to the discharge end by the screw conveyor 107 inside the silo. During this process, the dynamic weighing sensor in the weighing and metering system monitors the material flow rate per unit time in real time and feeds the data back to the PLC control module, which in turn uploads it to the central control system for precise control of the blending ratio.

[0040] Variable frequency regulation and uniform feeding: The central control system dynamically adjusts the speed of the variable frequency speed-regulating screw pump 109 according to the preset blending ratio and the actual flow deviation to ensure that the material conveyed downstream is continuous, uniform and controllable, and to ensure feeding accuracy.

[0041] The material is pneumatically conveyed to the burner. A screw pump 109 sends the material into a dilute-phase pneumatic conveying device 108, using clean compressed air from the kiln tail waste heat recovery system as the conveying air source. This process stably delivers the aluminum dust to the burner nozzle on an 8-meter platform. This design achieves cascaded energy utilization and reduces system energy consumption.

[0042] High-temperature injection and calcination participation: Aluminum dust is evenly injected into the high-temperature zone (temperature range 1350℃~1450℃) of the rotary kiln head through the burner nozzle. It is rapidly dispersed in the high-temperature airflow and fully mixed with the raw material, participating in the clinker calcination process. Its own combustible components simultaneously release calorific value, assisting the combustion of the main fuel and reducing natural gas consumption.

[0043] Intelligent combustion optimization control: The central control system combines data from the infrared thermometer in the firing zone with the analysis results of the oxygen content in the flue gas. It uses a fuzzy PID algorithm to adjust the fuel supply and air volume in real time, optimize combustion conditions, improve combustion completeness, suppress the generation of harmful gases such as NOx and CO, and ensure product quality stability.

[0044] Clinker cooling and flue gas treatment: The roasted material enters the cooling system as the kiln rotates to complete clinker preparation; the generated flue gas passes through the settling chamber for preliminary dust removal, the pulse bag filter for deep purification, and is then treated by the desulfurization and denitrification device to meet emission standards, achieving environmentally friendly operation throughout the entire process.

[0045] Closed-loop intelligent management, with the entire process centrally controlled: an online X-ray fluorescence analyzer checks the alumina content of 026 aluminum ash every 30 minutes, automatically determining whether to activate aluminum dust blending (5% blending for ≥80%, 2% blending for 70%-80%, and stopping blending for ≤70%). All key parameters (composition, flow rate, temperature, air volume, etc.) are collected, analyzed, and fed back in real time, forming a closed-loop intelligent management system covering the entire process from raw material testing to feeding control.

[0046] In summary, this workflow achieves fully automated, intelligent, and green processing of aluminum dust from bag breaking, screening, metering, conveying, precise co-firing to environmentally friendly emissions. It has comprehensive advantages of high efficiency, safety, energy saving, and emission reduction, and is suitable for co-processing in cement kilns or large-scale industrial applications in the metallurgical industry.

[0047] The above are preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A device for resource utilization of aluminum dust collection, comprising a silo (101), characterized in that: The silo body (101) is provided with a screen (102) in the middle. The interior of the silo body (101) is divided into a bag-breaking and sealing chamber (103) on the upper side and a buffer chamber (104) on the lower side by the screen (102). A bag-breaking knife (105) is also provided on the screen (102). A vibrator (106) for driving the screen (102) to vibrate is also provided on the inner wall of the silo body (101). A first conveying device is provided on the lower side of the buffer chamber (104). A screw pump (109) is also provided at the discharge end of the first conveying device. A weighing and metering system is also provided at the discharge end of the first conveying device. The screw pump (109) is also connected to a second conveying device. The other end of the second conveying device is connected to the burner nozzle through a material-air mixing channel (110).

2. The apparatus for resource utilization of aluminum dust collection as described in claim 1, characterized in that: The first conveying device is an in-warehouse screw conveyor (107); the second conveying device is a dilute phase pneumatic conveying device (108).

3. The apparatus for resource utilization of aluminum dust collection as described in claim 2, characterized in that: The burner nozzle is located on an 8-meter platform and corresponds to the high-temperature zone at the kiln head.

4. The apparatus for resource utilization of aluminum dust collection as described in claim 3, characterized in that: The screen (102) is a detachable structure made of wear-resistant stainless steel with a pore size of 5-10mm. It is used to intercept unbroken or clumped aluminum ash packaging materials to prevent them from entering the buffer chamber (104).

5. The apparatus for resource utilization of aluminum dust collection as described in claim 4, characterized in that: The top of the bag-breaking and sealing chamber (103) is equipped with a negative pressure dust suction port, which is connected to a dust removal device (111) through a pipe to collect the dust generated during the bag-breaking process and achieve dust-free operation.

6. The apparatus for resource utilization of aluminum dust collection as described in claim 5, characterized in that: The weighing and metering system includes a dynamic weighing sensor and a PLC control module, which can monitor the amount of aluminum dust conveyed per unit time in real time and feed the data back to the central control system to automatically adjust the conveying speed to ensure the mixing accuracy.

7. The apparatus for resource utilization of aluminum dust collection as described in claim 1, characterized in that: The spiral pump (109) is a variable frequency speed control spiral pump (109), whose speed is dynamically adjusted by the central control system according to the rotary kiln operating parameters and the aluminum dust mixing ratio to ensure continuous, uniform and controllable material supply.

8. The apparatus for resource utilization of aluminum dust collection as described in claim 1, characterized in that: The working air source of the dilute phase pneumatic conveying equipment (108) comes from the clean compressed air of the kiln tail waste heat recovery system, realizing the cascade utilization of energy and reducing system energy consumption.

9. A method for resource-based utilization of aluminum dust, based on the apparatus for resource-based utilization of aluminum dust according to any one of claims 5-8, characterized in that: Includes the following steps: S1. Determine the blending ratio of aluminum dust based on the alumina content of the current batch of 026 aluminum ash. S2. The packaging bag (112) containing aluminum dust is transferred to the bag breaking and sealing chamber (103) by a forklift. During the fall, the packaging bag (112) will be automatically cut by the bag breaking knife (105) so that the aluminum dust falls into the bag breaking and sealing chamber (103). S3. Driven by the vibrator (106), the screen (102) generates periodic vibration, which promotes the material to pass smoothly through the screen (102) and enter the buffer chamber (104) below, while intercepting impurities that are not completely broken or clumped. S4. The screw conveyor (107) in the silo continuously transports the aluminum dust in the buffer silo (104) to the discharge end, and performs dynamic weighing through the weighing and metering system, and feeds back the flow data to the PLC control module in real time. S5. Based on the deviation between the set mixing ratio and the actual flow rate, the central control system adjusts the speed of the variable frequency speed-regulating screw pump (109) to achieve precise material supply. S6, the spiral pump (109) uniformly feeds the material into the dilute phase pneumatic conveying equipment (108). Using clean compressed air from the waste heat recovery system at the kiln tail, the aluminum dust is conveyed to the burner feed pipe on the 8-meter platform through the material-air mixing channel (110). In the high-temperature area of ​​the rotary kiln head, the aluminum dust is uniformly sprayed into the kiln through the spray nozzle, quickly dispersed and fully mixed with the high-temperature airflow and materials, and participates in the calcination process. S7. Utilize the calorific value of the combustible components contained in the aluminum dust itself to assist combustion, monitor the temperature changes of the rotary kiln firing section in real time, dynamically adjust the main fuel supply and auxiliary air volume, reduce natural gas consumption, and improve energy utilization efficiency. S8. Optimize combustion conditions through the burner's temperature and airflow regulation device to improve combustion completeness and reduce unburned carbon residue and the generation of harmful gases such as NOx and CO. S9. The roasted material enters the cooling system as the kiln rotates, completing the clinker preparation; the flue gas is then treated sequentially through the settling chamber, pulse bag filter, and desulfurization and denitrification device before being discharged in compliance with standards.

10. The method for resource utilization of aluminum dust as described in claim 9, characterized in that: In step S1, the blending ratio of aluminum dust is determined based on the real-time measurement results of the chemical composition of 026 aluminum ash fed into the kiln tail: when the alumina content is ≥80%, aluminum dust is blended at a ratio of 5%; when the alumina content is 70%-80%, aluminum dust is blended at a ratio of 2%; when the alumina content is ≤70%, blending is stopped. The chemical composition of 026 aluminum ash is detected every 30 minutes by an online X-ray fluorescence analyzer, and the detection data is automatically uploaded to the central control system for real-time adjustment of the conveying parameters of aluminum dust.

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