A method and system for processing high temperature calcined aluminum dross

Abstract

The application provides a high-temperature calcination aluminum ash treatment method and system, and belongs to the technical field of solid waste resource utilization. The method comprises the following steps: obtaining the aluminum ash state of an aluminum ash sample, determining a first temperature control gradient according to the aluminum ash state, performing first temperature control separation on the aluminum ash sample, performing component detection on each first separation result, further determining a molten salt ratio and an initial magnetic field strength, performing reaction on the first separation result according to the molten salt ratio and the initial magnetic field strength, obtaining a molten salt and a second separation result, performing value evaluation on the second separation result, directly using high-value products, determining a second temperature control gradient according to low-value products, performing second temperature control separation on the low-value products, obtaining a third separation result, performing state separation on the third separation result, determining a gas phase result and a solid phase result, performing directional extraction treatment on the gas phase result and the solid phase result respectively, and obtaining a treatment result, so that full-component resource utilization and clean production of aluminum ash are realized.

Description

Technical Field

[0001] This invention relates to the field of solid waste resource utilization technology, and in particular to a method and system for treating high-temperature calcined aluminum ash. Background Technology

[0002] Aluminum ash is a hazardous waste inevitably generated during the electrolytic aluminum production, casting, and processing, with an annual output of millions of tons, posing a huge environmental burden. Currently, aluminum ash treatment mainly relies on three technologies: ash frying, wet processing, and pyrolysis. These traditional technologies generally suffer from core drawbacks such as incomplete resource recovery, high environmental pollution risks, high operating costs, or inability to achieve stable production.

[0003] Therefore, the present invention provides a method and system for treating high-temperature calcined aluminum ash. Summary of the Invention

[0004] This invention provides a high-temperature calcined aluminum ash treatment method and system. Through intelligent detection of aluminum ash composition and properties, and through the coordinated regulation of multi-level temperature control, magnetic field, and molten salt, it achieves deep separation of metallic aluminum and activation of oxides. Finally, through gas-solid separation and directional extraction, it achieves high-value resource utilization of all components. It adopts an intelligent closed-loop control logic of perception-decision-execution, deeply integrating thermodynamic separation, electromagnetic fluid control, and advanced oxidation technology to form an adaptive and optimized resource recovery system, improving the resource recovery rate of aluminum ash, reducing pollution risks, and realizing the full-component resource utilization and clean production of aluminum ash.

[0005] This invention provides a method for treating high-temperature calcined aluminum ash, comprising:

[0006] Step 1: Obtain the aluminum ash state of the aluminum ash sample, determine the first temperature control gradient based on the aluminum ash state, perform the first temperature control separation on the aluminum ash sample, and obtain the first separation result;

[0007] Step 2: Analyze the composition of each first separation result, determine the molten salt ratio based on the analysis results, determine the initial magnetic field strength of the alternating magnetic field based on the analysis results, react the first separation result with the molten salt under the action of the initial magnetic field strength, and dynamically adjust the initial magnetic field strength based on the reaction situation to obtain the second separation result of the molten salt.

[0008] Step 3: Evaluate the value of the second separation result. High-value products are used directly. The second temperature control gradient is determined based on the low-value products. The low-value products are then separated under second temperature control based on the second temperature control gradient to obtain the third separation result.

[0009] Step 4: Perform state separation on the third separation result to determine the gas phase result and the solid phase result. Perform directional extraction processing on the gas phase result and the solid phase result respectively to obtain the processing result.

[0010] This invention provides a method for treating high-temperature calcined aluminum ash, comprising: obtaining the aluminum ash state of an aluminum ash sample; determining a first temperature control gradient based on the aluminum ash state; performing a first temperature-controlled separation on the aluminum ash sample; and obtaining a first separation result, including:

[0011] Chemical composition analysis was performed on the aluminum ash sample to determine the aluminum ash-chemical state. Physical property analysis was performed on the aluminum ash sample to determine the aluminum ash-physical state. The aluminum ash-chemical state and the aluminum ash-physical state were combined to obtain the aluminum ash state.

[0012] The state of aluminum ash is input into the intelligent decision-making model. The intelligent decision-making model calls the thermodynamic database and the historical optimized process library to determine the critical reaction temperature point, the precise control strategy of the atmosphere and the reaction kinetic parameters, and generates a coordinated instruction of temperature-time-atmosphere-equipment to obtain the first temperature control gradient.

[0013] The aluminum ash sample was subjected to first temperature-controlled separation based on the first temperature control gradient, and the first separation result was obtained.

[0014] This invention provides a method for treating high-temperature calcined aluminum ash, comprising: analyzing the composition of each first separation result; determining the molten salt ratio based on the analysis results; determining the initial magnetic field strength of an alternating magnetic field based on the analysis results; reacting the first separation result with the molten salt under the initial magnetic field strength; dynamically adjusting the initial magnetic field strength based on the reaction; and thereby obtaining a second separation result between the molten salt and the first separation result.

[0015] Rapid sample preparation is performed on the first separation result, and the components of the prepared sample are analyzed to obtain the detection results for each first separation result;

[0016] Based on the test results, the corresponding molten salt ratio is matched from the composition-molten salt ratio library, and the corresponding initial magnetic field strength is matched from the composition-magnetic field strength table based on the test results.

[0017] The first separation result is reacted with molten salt of the corresponding molten salt ratio under the action of an initial magnetic field strength. The reaction is monitored in real time by pre-arranged sensors, and the reaction status is determined based on the real-time monitoring results.

[0018] The reaction was compared with the preset ideal target, and the initial magnetic field strength was dynamically adjusted until the reaction ended, yielding the molten salt and the second separation result.

[0019] This invention provides a method for treating high-temperature calcined aluminum ash, which compares the reaction process with a preset ideal target and dynamically adjusts the initial magnetic field strength until the reaction is completed, yielding a second separation result, including:

[0020] Calculate the rate of change of aluminum droplet size and the rate of change of aluminum droplet purity per unit time based on the reaction situation, and derive the current comprehensive efficiency index based on the rate of change of aluminum droplet size and the rate of change of aluminum droplet purity.

[0021] The current comprehensive efficiency index is compared with the maximum theoretical comprehensive efficiency index to generate an efficiency gap signal. The initial magnetic field strength of the collected data is dynamically adjusted based on the efficiency gap signal.

[0022] The purity change rate is continuously monitored, and a convergence flag is triggered when its absolute value is less than a preset minimum threshold.

[0023] Based on the dynamically adjusted magnetic field strength curve, the ratio of the additional energy consumption caused by the dynamic adjustment of magnetic field strength to the purity improvement value is calculated. When the ratio exceeds a preset critical threshold, the benefit lower limit flag is triggered.

[0024] When the convergence flag and the benefit lower limit flag are triggered simultaneously, it is determined that the reaction has reached the optimal endpoint, and a command to terminate the reaction is immediately sent to the magnetic field module, and the reaction ends.

[0025] During and after the magnetic field decay process, the molten salt, metal phase and slag phase are determined by three-phase sedimentation separation. The molten salt is then recycled, and the metal phase and slag phase constitute the second separation result.

[0026] This invention provides a method for treating high-temperature calcined aluminum ash, which involves evaluating the value of a second separation result, using high-value products directly, determining a second temperature control gradient based on low-value products, and performing a second temperature-controlled separation on the low-value products according to the second temperature control gradient to obtain a third separation result, including:

[0027] The metal phase in the second separation result is subjected to a first value assessment. If it is greater than the first value threshold, it is marked as high value; if it is less than or equal to the first value threshold but greater than the second value threshold, it is marked as medium value; if it is less than or equal to the second value threshold, it is marked as low value.

[0028] A second value assessment is performed on the slag phase in the second separation result. If the preset value condition is met, it is considered high value; otherwise, it is considered low value.

[0029] Based on the product composition of the low-value product in the second separation result, a second temperature control gradient is determined, and the low-value product is subjected to a second temperature control separation to obtain a third separation result.

[0030] This invention provides a method for treating high-temperature calcined aluminum ash, which involves matching the high-value and medium-value products in the metallic phase of the second separation result with the high-value products in the slag phase using the corresponding application methods in a product usage table.

[0031] This invention provides a method for treating high-temperature calcined aluminum ash, which involves performing state separation on the third separation result to determine the gas phase result and the solid phase result, and then performing directional extraction processing on the gas phase result and the solid phase result to obtain the processing result, including:

[0032] The third separation result is transmitted to a cyclone separator for coarse separation to recover coarse particles. The gas and fine particles enter a high-temperature bag filter to obtain gas phase and solid phase results.

[0033] The gas phase results were subjected to multi-stage gradient condensation, and the remaining gas was subjected to pressure swing adsorption to obtain the first treatment result.

[0034] The solid phase results are then subjected to a selective leaching process. The compositional characteristics of the solid phase results are analyzed, and a targeted solution is prepared based on these characteristics. The solid phase results are then extracted using a targeted solution extraction-precipitation crystallization process to obtain the second processing result.

[0035] This invention provides a high-temperature calcined aluminum ash treatment system, comprising:

[0036] First separation module: acquires the aluminum ash state of the aluminum ash sample, determines the first temperature control gradient based on the aluminum ash state, performs first temperature control separation on the aluminum ash sample, and obtains the first separation result;

[0037] The second separation module performs component detection on each first separation result, determines the molten salt ratio based on the detection results, determines the initial magnetic field strength of the alternating magnetic field based on the detection results, reacts the first separation result with the molten salt under the action of the initial magnetic field strength, and dynamically adjusts the initial magnetic field strength based on the reaction situation to obtain the second separation result of the molten salt.

[0038] The third separation module evaluates the value of the second separation result. High-value products are used directly. The second temperature control gradient is determined based on the low-value products. The low-value products are then separated under second temperature control based on the second temperature control gradient to obtain the third separation result.

[0039] Extraction and processing module: Performs state separation on the third separation result, determines the gas phase result and the solid phase result, and performs targeted extraction processing on the gas phase result and the solid phase result respectively to obtain the processing result.

[0040] Compared with existing technologies, the beneficial effects of this application are as follows: Through intelligent detection of aluminum ash composition and physical properties, and through the coordinated regulation of multi-level temperature control, magnetic field, and molten salt, deep separation of metallic aluminum and oxide activation are achieved. Finally, through gas-solid separation and directional extraction, the high-value utilization of all components is achieved. By adopting an intelligent closed-loop control logic of perception-decision-execution, thermodynamic separation, electromagnetic fluid control, and advanced oxidation technology are deeply integrated to form an adaptive and optimized resource recycling system, thereby improving the resource recovery rate of aluminum ash, reducing pollution risks, and realizing the full-component resource utilization and clean production of aluminum ash.

[0041] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings.

[0042] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0043] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0044] Figure 1 This is a schematic diagram of a high-temperature calcined aluminum ash treatment method and system provided in an embodiment of the present invention;

[0045] Figure 2 This is a schematic diagram of a high-temperature calcined aluminum ash treatment method and system provided in an embodiment of the present invention. Detailed Implementation

[0046] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention. Example 1:

[0047] This invention provides a method for treating high-temperature calcined aluminum ash, such as... Figure 1 As shown, it includes:

[0048] Step 1: Obtain the aluminum ash state of the aluminum ash sample, determine the first temperature control gradient based on the aluminum ash state, perform the first temperature control separation on the aluminum ash sample, and obtain the first separation result;

[0049] Step 2: Analyze the composition of each first separation result, determine the molten salt ratio based on the analysis results, determine the initial magnetic field strength of the alternating magnetic field based on the analysis results, react the first separation result with the molten salt under the action of the initial magnetic field strength, and dynamically adjust the initial magnetic field strength based on the reaction situation to obtain the second separation result of the molten salt.

[0050] Step 3: Evaluate the value of the second separation result. High-value products are used directly. The second temperature control gradient is determined based on the low-value products. The low-value products are then separated under second temperature control based on the second temperature control gradient to obtain the third separation result.

[0051] Step 4: Perform state separation on the third separation result to determine the gas phase result and the solid phase result. Perform directional extraction processing on the gas phase result and the solid phase result respectively to obtain the processing result.

[0052] In this embodiment, the aluminum ash state is a data package that integrates chemical and physical states. For example, {Chemical composition: Al content 60%, Al2O3 content 22%, NaCl content 10%, Physical properties: D50=2.0mm, Moisture content 6%}, forming a complete digital file of the material.

[0053] In this embodiment, the first temperature control gradient is a temperature-time-atmosphere program customized to achieve initial separation. For example, a heat treatment program with an N2 protective environment below 600°C is developed.

[0054] In this embodiment, the first temperature-controlled separation is a physical process that executes a gradient program. Specifically, the process is as follows: Low temperature stage: electromagnetic eddy current stirring is introduced to increase the particle size of molten aluminum droplets from 1 mm to 5 mm through collision and polymerization; Medium temperature stage: a CO2 / O2 mixed oxidation atmosphere is used to convert residual aluminum into nanoporous Al2O3; High temperature stage: CaF2 additive is added to reduce the phase transition temperature by 200°C.

[0055] In this embodiment, the first separation result is a mixture produced by the primary separation, not a single pure product, but a collection of two-phase or three-phase systems formed according to the differences in material density and melting point.

[0056] In this embodiment, the molten salt ratio is determined based on the results from the component-molten salt ratio library, specifying the exact mass percentage of each component in the molten salt used in this reaction. For example, the molten salt ratio determined for this reaction is: 50% sodium chloride (NaCl), 30% potassium chloride (KCl), and 20% aluminum fluoride (AlF3).

[0057] In this embodiment, the initial magnetic field strength is calculated or matched based on a composition-magnetic field strength table, representing the strength value of the alternating magnetic field applied at the start of the reaction. For example, after calculation, the control system outputs a command to the electromagnetic coil to generate an initial alternating magnetic field of 0.5T.

[0058] In this embodiment, the reaction status is a real-time state description of the reaction process and effect derived from the fusion of sensor data. For example, {average diameter of aluminum droplets: 2.5 mm, purity of molten aluminum: 96.5%, reaction temperature: 1150 °C}.

[0059] In this embodiment, dynamic adjustment refers to real-time optimization control of the magnetic field strength after comparing the actual reaction with the ideal target. For example, if the growth rate of aluminum droplets is found to be too slow, the magnetic field strength is increased from 0.5T to 0.65T to enhance the electromagnetic stirring force and promote the collision and aggregation of aluminum droplets.

[0060] In this embodiment, the molten salt is a recyclable molten salt phase that is typically located in the middle layer of the reaction products after the reaction is complete. For example, a mixed salt with the composition NaCl-KCl-AlF3 may contain a small amount of oxide impurities after use, which can be purified and recycled.

[0061] In this embodiment, the second separation result is the final product after molten salt-magnetic field deep treatment. It is a product with higher purity and more thorough separation than the first separation result, and includes the metal phase and slag phase.

[0062] In this embodiment, the second temperature control gradient is a temperature control scheme tailored to the product composition of low-value products, achieving component separation by precisely controlling the temperature and duration of different temperature zones. For example, when processing zinc-containing slag, a three-stage gradient is used: 500℃ for zinc volatilization, 900℃ for carbonate decomposition, and 1200℃ for melting and separation.

[0063] In this embodiment, the third separation result is a new set of products obtained after temperature-controlled separation of low-value products, which is the final output of resource recovery. For example, processing low-value slag may yield three separation products: rare earth concentrate, recovered salts, and final waste residue, thus realizing waste resource recovery.

[0064] In this embodiment, the value assessment includes a first value assessment and a second value assessment.

[0065] The working principle and beneficial effects of the above technical solution are as follows: through intelligent detection of aluminum ash composition and physical properties, and through the coordinated regulation of multi-level temperature control, magnetic field and molten salt, deep separation of metallic aluminum and activation of oxides are achieved. Finally, through gas-solid separation and directional extraction, the high-value utilization of all components is achieved. By adopting the intelligent closed-loop control logic of perception-decision-execution, thermodynamic separation, electromagnetic fluid control and advanced oxidation technology are deeply integrated to form an adaptive and optimized resource recycling system, which improves the resource recovery rate of aluminum ash, reduces pollution risk, and realizes the full-component resource utilization and clean production of aluminum ash. Example 2:

[0066] This invention provides a method for treating high-temperature calcined aluminum ash, comprising: obtaining the aluminum ash state of an aluminum ash sample; determining a first temperature control gradient based on the aluminum ash state; performing a first temperature-controlled separation on the aluminum ash sample; and obtaining a first separation result, including:

[0067] Chemical composition analysis was performed on the aluminum ash sample to determine the aluminum ash-chemical state. Physical property analysis was performed on the aluminum ash sample to determine the aluminum ash-physical state. The aluminum ash-chemical state and the aluminum ash-physical state were combined to obtain the aluminum ash state.

[0068] The state of aluminum ash is input into the intelligent decision-making model. The intelligent decision-making model calls the thermodynamic database and the historical optimized process library to determine the critical reaction temperature point, the precise control strategy of the atmosphere and the reaction kinetic parameters, and generates a coordinated instruction of temperature-time-atmosphere-equipment to obtain the first temperature control gradient.

[0069] The aluminum ash sample was subjected to first temperature-controlled separation based on the first temperature control gradient, and the first separation result was obtained.

[0070] In this embodiment, the aluminum ash-chemical state refers to the quantitative data on the chemical composition and phase composition of the aluminum ash. For example, the content of metallic aluminum (Al) is 60%, the content of alumina (Al₂O₃) is 22%, the content of sodium chloride (NaCl) is 10%, the content of aluminum nitride (AlN) is 5%, and the content of fluoride is 2%. This data can be obtained using equipment such as X-ray fluorescence spectrometer (XRF).

[0071] In this embodiment, the aluminum ash-physical state is a set of parameters describing the physical properties of the aluminum ash. For example, particle size distribution D50 = 2.0 mm, moisture content 6%, true density 2.9 g / cm³, and bulk density 1.5 g / cm³ can be obtained using a laser particle size analyzer and a density meter.

[0072] In this embodiment, the input to the intelligent decision-making model is the received aluminum ash state data. For example, the input { 60%, NaCl: 10%, D50: 2.0mm} to the central processing unit.

[0073] In this embodiment, the thermodynamic database is a data system that stores the thermodynamic properties of substances. For example, querying the database yields information such as aluminum melting point 660℃, NaCl melting point 801℃, etc. Key temperature points include sublimation temperature of 1272℃.

[0074] In this embodiment, the historical optimized process library is an experience database that stores successful process parameters. For example, retrieving historical records reveals when... When the content is >55%, the optimal low-temperature range temperature is 580±10℃.

[0075] In this embodiment, the critical reaction temperature is the temperature threshold at which a substance undergoes a phase transition or decomposition. For example, 600°C is identified as the melting point of Al and 980°C as the decomposition point of Na3AlF6.

[0076] In this embodiment, the precise atmosphere control strategy is a gas environment scheme formulated according to the reaction requirements. For example, the low-temperature section uses 99.99% N2 protection to prevent oxidation, with a flow rate of 5 m³ / h.

[0077] In this embodiment, the reaction kinetic parameters are process parameters that describe the reaction rate. For example, it is calculated that it takes 45 minutes for 2mm diameter aluminum particles to completely fuse.

[0078] In this embodiment, the temperature-time-atmosphere-equipment coordinated command is a comprehensive control command issued to the equipment. For example, it is a command set: {0-20min: heat up to 580℃; 20-65min: maintain temperature at 580℃; N2 flow rate 5m³ / h}.

[0079] In this embodiment, the intelligent decision-making model outputs the generated first temperature control gradient scheme. For example, the output gradient curve T = [0 → 580℃ 20min → constant temperature 45min].

[0080] The working principle and beneficial effects of the above technical solution are as follows: Based on real-time detection data of the chemical composition and physical properties of aluminum ash, a customized temperature-atmosphere-time coordinated control command is accurately generated by integrating thermodynamic and historical process data through intelligent algorithms, thereby achieving precision and intelligence in the separation process, significantly improving metal recovery rate and reaction efficiency, and avoiding problems such as kiln caking and over-burning from the source. Example 3:

[0081] This invention provides a method for treating high-temperature calcined aluminum ash, which involves analyzing the composition of each first separation result, determining the molten salt ratio based on the analysis results, determining the initial magnetic field strength of an alternating magnetic field based on the analysis results, reacting the first separation result with the molten salt under the action of the initial magnetic field strength, dynamically adjusting the initial magnetic field strength based on the reaction situation, and thus obtaining a second separation result of the molten salt. The method includes:

[0082] Rapid sample preparation is performed on the first separation result, and the components of the prepared sample are analyzed to obtain the detection results for each first separation result;

[0083] Based on the test results, the corresponding molten salt ratio is matched from the composition-molten salt ratio library, and the corresponding initial magnetic field strength is matched from the composition-magnetic field strength table based on the test results.

[0084] The first separation result is reacted with molten salt of the corresponding molten salt ratio under the action of an initial magnetic field strength. The reaction is monitored in real time by pre-arranged sensors, and the reaction status is determined based on the real-time monitoring results.

[0085] The reaction was compared with the preset ideal target, and the initial magnetic field strength was dynamically adjusted until the reaction ended, yielding the molten salt and the second separation result.

[0086] In this embodiment, rapid sample preparation is the process of rapidly sampling, quenching, crushing, and grinding the first separation result to prepare a small sample with uniform composition that can be used for immediate analysis. For example, a robotic arm extracts a small spoonful of melt from the reactor outlet, immerses it in water for rapid cooling to form solid particles, and then grinds it into a fine powder of <100μm using a small crusher before conveying it to the analyzer.

[0087] In this embodiment, the component-molten salt ratio library is an expert knowledge base or database that stores the correspondence between various material components and optimal molten salt formulations. For example, if Al2O3 > 60% is detected in the slag, then the recommended molten salt ratio is NaCl:KCl:AlF3 = 5:3:2; if the F content is high, then the recommended ratio is NaF:KCl = 4:6.

[0088] In this embodiment, the composition-magnetic field strength table is a reference table or calculation formula that specifies the initial magnetic field strength required for different material compositions, mainly the impurity content.

[0089] In this embodiment, the pre-positioned sensors are various detection devices embedded inside the reactor for real-time monitoring of the reaction process. For example, a high-temperature camera monitors the aggregation and movement of aluminum droplets on the melt surface; a laser online composition analyzer (LIBS) monitors real-time changes in the purity of the molten metal phases, such as the decrease in Fe and Si content; thermocouples accurately measure the temperature of different regions of the melt; and an electromagnetic flowmeter monitors the stability of the magnetic field current.

[0090] In this embodiment, the preset ideal target reflects the final technical and economic indicators that are expected to be achieved, and serves as the benchmark for regulation. For example, {target aluminum droplet diameter: >4mm, target aluminum purity: >99%, maximum energy consumption limit: 150kWh / t}.

[0091] In this embodiment, the end of the reaction is determined by indicating that the reaction has reached its optimal endpoint, such as achieving the required purity and keeping energy consumption within an acceptable range, and an instruction is given to automatically stop the reaction. For example, if the system detects that the aluminum purity has remained stable at 99.2% for one minute and that the energy efficiency ratio has recently decreased, it will then issue an instruction to stop heating and shut down the magnetic field.

[0092] In this embodiment, the magnetic field is dynamically adjusted by calculating the difference between the current comprehensive efficiency index and the maximum theoretical comprehensive efficiency index in real time. Combined with the convergence of the purity change rate and the dual threshold judgment of energy consumption efficiency, the reaction is intelligently terminated and precise separation is achieved by using three-phase sedimentation.

[0093] The working principle and beneficial effects of the above technical solution are as follows: Based on the component detection data of the first separation result, the molten salt formula and the initial magnetic field strength are intelligently matched. The reaction process is monitored in real time by the sensor and the magnetic field strength is dynamically adjusted to achieve closed-loop optimization control of the separation process. This realizes the precise synergistic regulation of molten salt components and electromagnetic field strength, which significantly improves the purity of metal recovery and reaction efficiency. Example 4:

[0094] This invention provides a method for treating high-temperature calcined aluminum ash, which involves comparing the reaction process with a preset ideal target and dynamically adjusting the initial magnetic field strength until the reaction is complete, thereby obtaining a second separation result, including:

[0095] Calculate the rate of change of aluminum droplet size and the rate of change of aluminum droplet purity per unit time based on the reaction situation, and derive the current comprehensive efficiency index based on the rate of change of aluminum droplet size and the rate of change of aluminum droplet purity.

[0096] The current comprehensive efficiency index is compared with the maximum theoretical comprehensive efficiency index to generate an efficiency gap signal. The initial magnetic field strength of the collected data is dynamically adjusted based on the efficiency gap signal.

[0097] The purity change rate is continuously monitored, and a convergence flag is triggered when its absolute value is less than a preset minimum threshold.

[0098] Based on the dynamically adjusted magnetic field strength curve, the ratio of the additional energy consumption caused by the dynamic adjustment of magnetic field strength to the purity improvement value is calculated. When the ratio exceeds a preset critical threshold, the benefit lower limit flag is triggered.

[0099] When the convergence flag and the benefit lower limit flag are triggered simultaneously, it is determined that the reaction has reached the optimal endpoint, and a command to terminate the reaction is immediately sent to the magnetic field module, and the reaction ends.

[0100] During and after the magnetic field decay process, the molten salt, metal phase and slag phase are determined by three-phase sedimentation separation. The molten salt is then recycled, and the metal phase and slag phase constitute the second separation result.

[0101] In this embodiment, ,in, Indicates the rate of change in aluminum droplet size; Denotes the polymerization rate constant; Denotes the fracture rate constant; Represents electromagnetic volume force; This indicates van der Waals force; This represents the dissipation force of turbulence; Indicates surface tension; Indicates the dynamic viscosity of the molten salt medium; D represents the density of the aluminum droplet; D represents the characteristic diameter of the aluminum droplet.

[0102] In this embodiment, ,in, This indicates the rate of change in the purity of the aluminum droplets; Indicates the rate of change in impurity concentration; Indicates the overall mass transfer coefficient; A represents the total mass transfer area; This indicates the instantaneous concentration of impurities inside the aluminum droplet; This represents the equilibrium concentration at which impurities are balanced with the current aluminum droplet concentration at the molten salt interface.

[0103] In this embodiment, the current comprehensive efficiency index is a dimensionless indicator that evaluates reaction efficiency in real time, and is calculated by weighting the change rate of aluminum droplet size and purity. For example, if the size change rate reaches the target of 90% and the purity change rate reaches the target of 95%, with each weighted at 50%, the index is 0.925, and the closer it is to 1, the better the efficiency.

[0104] In this embodiment, the performance gap signal is the difference between the current performance index and the theoretical maximum value, which is the direct basis for adjusting the magnetic field. A positive gap indicates insufficient performance and the need to strengthen the magnetic field, while a negative gap indicates the need to weaken it. For example, when the index is 0.8, the gap is 0.2, and the system strengthens the magnetic field accordingly.

[0105] In this embodiment, the preset minimum threshold is a minimum positive value threshold for judging whether the reaction is approaching completion. For example, if the purity change rate threshold is set to 0.01% / s, when the actual value is lower than this, the reaction is considered to be basically complete.

[0106] In this embodiment, the convergence flag is a Boolean signal that is triggered when the absolute value of the purity change rate is below a threshold. This indicates that the reaction rate has naturally decayed to a negligible level, such as when the monitored value is <0.01% / s, the flag is set.

[0107] In this embodiment, the magnetic field strength curve is a recorded curve showing the change of magnetic field strength over time, reflecting the history of dynamic adjustments. For example, the initial strength is 0.5T, which is increased to 0.8T in the middle stage to improve efficiency, and then reduced to 0.6T and maintained in the later stage.

[0108] In this embodiment, the ratio of additional energy consumption to purity improvement is an economic indicator that measures the effect of increased energy consumption on purity. For example, if an additional 100 kWh of energy consumption increases the purity from 97% to 98%, the ratio is 100 kWh / %.

[0109] In this embodiment, the preset critical threshold is the upper limit of the benefit ratio, representing the energy cost limit for a unit purity improvement. For example, if the factory sets it to 80kWh / %, anything exceeding this is considered uneconomical.

[0110] In this embodiment, the benefit lower limit flag is a Boolean signal that is triggered when the actual energy consumption purity ratio exceeds a critical threshold. This indicates that the economic benefits are no longer worthwhile; for example, the flag is set when the ratio reaches 100kWh / % > 80kWh / % threshold.

[0111] In this embodiment, the optimal endpoint is the decision point, which is determined to be reached when both the convergence flag and the benefit lower bound flag are True. This is the optimal balance between the natural completion of the reaction and the economic cost, at which point the reaction is immediately terminated.

[0112] In this embodiment, the metallic phase and the slag phase are the products after the reaction terminates and settles. The metallic phase is the lower layer of high-purity target metal, such as 99.5% molten aluminum; the slag phase is the upper layer of a mixture of solid impurities, such as alumina slag.

[0113] The working principle and beneficial effects of the above technical solution are as follows: By dynamically adjusting the magnetic field by calculating the difference between the current comprehensive efficiency index and the maximum theoretical comprehensive efficiency index in real time, and combining the convergence of the purity change rate and the dual threshold judgment of energy consumption efficiency, the reaction is intelligently terminated and precise separation is achieved by using three-phase sedimentation. This realizes intelligent closed-loop optimization and precise fixed-point termination of the reaction process, and minimizes energy consumption while ensuring high product purity. Example 5:

[0114] This invention provides a method for treating high-temperature calcined aluminum ash, which involves evaluating the value of a second separation result, using high-value products directly, determining a second temperature control gradient based on low-value products, and performing a second temperature-controlled separation on the low-value products according to the second temperature control gradient to obtain a third separation result, including:

[0115] The metal phase in the second separation result is subjected to a first value assessment. If it is greater than the first value threshold, it is marked as high value; if it is less than or equal to the first value threshold but greater than the second value threshold, it is marked as medium value; if it is less than or equal to the second value threshold, it is marked as low value.

[0116] A second value assessment is performed on the slag phase in the second separation result. If the preset value condition is met, it is considered high value; otherwise, it is considered low value.

[0117] Based on the product composition of the low-value product in the second separation result, a second temperature control gradient is determined, and the low-value product is subjected to a second temperature control separation to obtain a third separation result.

[0118] In this embodiment, the first value assessment is a quality grading process for the metallic phase, with metal purity as the core assessment indicator. The percentage content of the main metal is determined using techniques such as spectral analysis, and the phase is classified into high, medium, and low value levels based on its purity range, directly determining its commercial use and pricing.

[0119] In this embodiment, the first value threshold is the purity critical point that distinguishes high-value from medium-value metals, representing a high-standard quality threshold. If the metal purity exceeds this threshold, it is considered a high-quality product. For example, for aluminum, the first value threshold can be set to 99.5%, and aluminum ingots with a purity higher than this value can be used in high-end fields such as aerospace.

[0120] In this embodiment, the second value threshold is a purity cutoff point that distinguishes medium-value from low-value metals; it represents the minimum acceptable quality baseline. Metals with purity equal to or below this value have extremely low economic value. For example, if the second value threshold for aluminum is set to 97.0%, aluminum with a purity below this level must be refined and cannot be sold directly as a product.

[0121] In this embodiment, the second value assessment is a process of judging the value of the slag phase. The focus of the assessment is not purity but whether it contains sufficient amounts of recyclable valuable components. By analyzing the content of specific elements or compounds, a binary classification judgment of high or low value is made.

[0122] In this embodiment, the preset value condition is a specific content standard for judging whether a slag phase is of high value, usually the minimum concentration requirement of a certain valuable component. For example, setting the lithium content in the slag to ≥3% as the preset value condition, slag phases that meet this condition are considered high value and lithium can be extracted.

[0123] In this embodiment, product composition refers to the detailed chemical composition analysis results of low-value products, including the types and contents of major components and impurity elements. For example, the composition of low-value aluminum may be 95% aluminum, 3% silicon, and 2% iron.

[0124] The working principle and beneficial effects of the above technical solution are as follows: multi-level value assessment of the second separation product is performed based on component data, and second temperature-controlled separation is carried out intelligently according to the characteristics of low-value materials, so as to realize the efficient activation and transformation of residual components, realize the refined graded management of products and the tiered utilization of resources, and significantly improve the conversion efficiency of low-value materials and the added value of products. Example 6:

[0125] This invention provides a method for treating high-temperature calcined aluminum ash, which involves matching the high-value and medium-value products in the metallic phase of the second separation result with the high-value products in the slag phase using the corresponding application methods in a product usage table.

[0126] In this embodiment, the product usage table is a standardized resource allocation database that defines the mapping relationship between products of different qualities and their optimal application directions. For example, a digitized lookup table records entries such as aluminum with a purity greater than 99.5% corresponding to an aerospace materials workshop, and slag with a lithium content greater than 3% corresponding to a lithium extraction production line.

[0127] In this embodiment, the usage path refers to the specific processing flow, application scenario, or final product form to which the product is matched. It represents the final outlet for value realization and is set based on the principle of technological and economic optimization. For example, the usage path of high-value aluminum ingots is to be sold directly to automobile manufacturers as high-end aluminum alloy billets, while the usage path of high-value slag phases is to be returned to the electrolytic cell as supplementary raw materials for recycling, thereby saving on the cost of purchasing new salt.

[0128] The working principle and beneficial effects of the above technical solution are as follows: Based on the results of multi-dimensional value assessment, the precise and targeted utilization of different grades of products is achieved through matching the uses of the products, forming a resource-based closed loop, breaking through the inefficient mode of traditional mixed processing, and realizing refined resource management that makes high-quality products better and low-quality products better. Example 7:

[0129] This invention provides a method for treating high-temperature calcined aluminum ash, which involves performing state separation on the third separation result to determine the gas phase result and the solid phase result, and then performing directional extraction processing on the gas phase result and the solid phase result to obtain the processing result, including:

[0130] The third separation result is transmitted to a cyclone separator for coarse separation to recover coarse particles. The gas and fine particles enter a high-temperature bag filter to obtain gas phase and solid phase results.

[0131] The gas phase results were subjected to multi-stage gradient condensation, and the remaining gas was subjected to pressure swing adsorption to obtain the first treatment result.

[0132] The solid phase results are then subjected to a selective leaching process. The compositional characteristics of the solid phase results are analyzed, and a targeted solution is prepared based on these characteristics. The solid phase results are then extracted using a targeted solution extraction-precipitation crystallization process to obtain the second processing result.

[0133] In this embodiment, a cyclone separator is a commonly used device for gas-solid separation using centrifugal force. Gas enters tangentially and rotates at high speed; denser solid particles are thrown against the separator wall by centrifugal force and fall down the wall for collection. For example, when processing the third separation result of aluminum ash, the gas flow is introduced into a cyclone separator to preliminarily separate heavier metal oxide particles and dust using centrifugal force.

[0134] In this embodiment, coarse separation refers to the initial, highly efficient first-stage separation, the main purpose of which is to quickly remove most of the solid particles and reduce the load on subsequent fine separation equipment. For example, the cyclone separator process itself is coarse separation, which can efficiently remove more than 80% of particles with a diameter greater than 10 μm.

[0135] In this embodiment, coarse particles are relatively large solid particles collected after coarse separation. For example, powder mainly composed of alumina and larger metal oxides collected from the bottom of a cyclone separator.

[0136] In this embodiment, the gas and fine particles are the airflow that, after coarse separation, is discharged from the top of the cyclone separator and still contains a large number of tiny particles. For example, it is a mixed airflow containing extremely fine alkali metal salts, fluoride dust, and volatile gaseous substances.

[0137] In this embodiment, the high-temperature bag filter is a precision filtration device with built-in high-temperature resistant filter bags, used to capture fine particulate matter in airflow and capable of handling high-temperature gases. For example, dust-laden gas from a cyclone separator, which is still at a relatively high temperature, is passed into this device, where the filter bags can capture more than 99% of the fine particles, forming a filter cake.

[0138] In this embodiment, the gas phase result is a pure high-temperature gas mixture obtained after filtration by a high-temperature bag filter. For example, it is a mixture of gas mainly containing ammonia, a small amount of volatile salt vapor, and water vapor.

[0139] In this embodiment, the solid phase is fine particulate solid powder captured and collected by a high-temperature bag filter. For example, fine powdery materials enriched with valuable elements such as lithium, potassium, sodium, and fluorine.

[0140] In this embodiment, multi-stage gradient condensation is a process that gradually decreases the temperature, causing components with different boiling points in the gas phase to condense separately at different temperature ranges. For example, the first stage of condensation recovers high-purity liquid ammonia; the second stage of deep condensation recovers volatile salts such as ammonium fluoride.

[0141] In this embodiment, pressure swing adsorption (PSA) is a gas separation technique that utilizes the difference in adsorption capacity of an adsorbent for gases under different pressures to purify or separate gas mixtures. For example, PSA can be used to purify the remaining non-condensable gas after condensation to obtain high-purity hydrogen for use as fuel or chemical feedstock.

[0142] In this embodiment, the first processing result is the final product set after a complete set of processing of the gas phase results. For example, the recovered liquid ammonia, condensed salt, and purified hydrogen are all high-value products that can be sold or reused.

[0143] In this embodiment, the selective leaching process is a hydrometallurgical process that uses a specific solvent to selectively dissolve the target valuable components in the solid phase while minimizing the dissolution of other components. For example, lithium-rich solid phases are mixed and stirred with sulfuric acid solution in a reactor, where lithium is selectively dissolved to form a lithium sulfate solution, while impurities such as alumina are left as slag.

[0144] In this embodiment, compositional characteristics refer to the chemical composition, phase structure, and elemental occurrence states of the solid-state product. For example, through X-ray diffraction and chemical analysis, it was determined that lithium in the solid-state product mainly exists in the form of spodumene and lithium fluoride, while potassium exists in the form of potassium chloride.

[0145] In this embodiment, the targeting solution is a solvent specifically formulated according to the characteristics of its components, capable of efficiently and selectively dissolving the target substance. For example, for materials containing spodumene, a mixed solution of sulfuric acid and a co-solvent is formulated as the targeting solution, specifically for the efficient leaching of lithium.

[0146] In this embodiment, the extraction-precipitation-crystallization process is a combined process. Extraction uses an organic solvent to selectively extract target metal ions from the leachate; precipitation involves adding chemical reagents to cause the target component to precipitate as an insoluble substance; and crystallization involves evaporation, concentration, and cooling to precipitate the target component in crystalline form. For example, for a lithium-containing solution obtained from leaching, impurity ions such as calcium and magnesium are first removed by solvent extraction. The purified solution is then precipitated and crystallized with sodium carbonate to finally obtain a high-purity lithium carbonate product.

[0147] In this embodiment, the second processing result is the final product set after a complete set of processing of the solid phase results. For example, the extracted high-purity lithium carbonate, recovered potassium salts, and inert calcium silicate slag that is ultimately completely harmless and can be used to produce cement or bricks.

[0148] The working principle and beneficial effects of the above technical solution are as follows: separation is achieved by utilizing the differences in gas and solid properties, and the gas phase components are condensed in stages through temperature gradients. The remaining gas is selectively separated by an adsorbent. Based on the characteristics of the solid phase components, a specific leaching agent is formulated to achieve selective dissolution and crystallization purification of target elements, realize the fine recovery of all components, significantly improve resource utilization, completely eliminate secondary pollution, and ultimately achieve complete resource utilization of the residue. Example 8:

[0149] This invention provides a high-temperature calcined aluminum ash treatment system, such as... Figure 2 As shown, it includes:

[0150] First separation module: acquires the aluminum ash state of the aluminum ash sample, determines the first temperature control gradient based on the aluminum ash state, performs first temperature control separation on the aluminum ash sample, and obtains the first separation result;

[0151] The second separation module performs component detection on each first separation result, determines the molten salt ratio based on the detection results, determines the initial magnetic field strength of the alternating magnetic field based on the detection results, reacts the first separation result with the molten salt under the action of the initial magnetic field strength, and dynamically adjusts the initial magnetic field strength based on the reaction situation to obtain the second separation result of the molten salt.

[0152] The third separation module evaluates the value of the second separation result. High-value products are used directly. The second temperature control gradient is determined based on the low-value products. The low-value products are then separated under second temperature control based on the second temperature control gradient to obtain the third separation result.

[0153] Extraction and processing module: Performs state separation on the third separation result, determines the gas phase result and the solid phase result, and performs targeted extraction processing on the gas phase result and the solid phase result respectively to obtain the processing result.

[0154] The working principle and beneficial effects of the above technical solution are as follows: through intelligent detection of aluminum ash composition and physical properties, and through the coordinated regulation of multi-level temperature control, magnetic field and molten salt, deep separation of metallic aluminum and activation of oxides are achieved. Finally, through gas-solid separation and directional extraction, the high-value utilization of all components is achieved. By adopting the intelligent closed-loop control logic of perception-decision-execution, thermodynamic separation, electromagnetic fluid control and advanced oxidation technology are deeply integrated to form an adaptive and optimized resource recycling system, which improves the resource recovery rate of aluminum ash, reduces pollution risk, and realizes the full-component resource utilization and clean production of aluminum ash.

[0155] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for treating high-temperature calcined aluminum ash, characterized in that, include: Step 1: Obtain the aluminum ash state of the aluminum ash sample, determine the first temperature control gradient based on the aluminum ash state, perform the first temperature control separation on the aluminum ash sample, and obtain the first separation result; Step 2: Analyze the composition of each first separation result, determine the molten salt ratio based on the analysis results, determine the initial magnetic field strength of the alternating magnetic field based on the analysis results, react the first separation result with the molten salt under the action of the initial magnetic field strength, and dynamically adjust the initial magnetic field strength based on the reaction situation to obtain the second separation result of the molten salt. Step 3: Evaluate the value of the second separation result. High-value products are used directly. The second temperature control gradient is determined based on the low-value products. The low-value products are then separated under second temperature control based on the second temperature control gradient to obtain the third separation result. Step 4: Perform state separation on the third separation result to determine the gas phase result and the solid phase result, and perform directional extraction processing on the gas phase result and the solid phase result respectively to obtain the processing result; Step 1 includes: Chemical composition analysis was performed on the aluminum ash sample to determine the aluminum ash-chemical state. Physical property analysis was performed on the aluminum ash sample to determine the aluminum ash-physical state. The aluminum ash-chemical state and the aluminum ash-physical state were combined to obtain the aluminum ash state. The state of aluminum ash is input into the intelligent decision-making model. The intelligent decision-making model calls the thermodynamic database and the historical optimized process library to determine the critical reaction temperature point, the precise control strategy of the atmosphere and the reaction kinetic parameters, and generates a coordinated instruction of temperature-time-atmosphere-equipment to obtain the first temperature control gradient. The aluminum ash sample was subjected to first temperature-controlled separation based on the first temperature control gradient, and the first separation result was obtained. Step 2 includes: Rapid sample preparation is performed on the first separation result, and the components of the prepared sample are analyzed to obtain the detection results for each first separation result; Based on the test results, the corresponding molten salt ratio is matched from the composition-molten salt ratio library, and the corresponding initial magnetic field strength is matched from the composition-magnetic field strength table based on the test results. The first separation result is reacted with molten salt of the corresponding molten salt ratio under the action of an initial magnetic field strength. The reaction is monitored in real time by pre-arranged sensors, and the reaction status is determined based on the real-time monitoring results. The reaction was compared with the preset ideal target, and the initial magnetic field strength was dynamically adjusted until the reaction ended, and the molten salt and the second separation result were obtained. Step 3 includes: The metal phase in the second separation result is subjected to a first value assessment. If it is greater than the first value threshold, it is marked as high value; if it is less than or equal to the first value threshold but greater than the second value threshold, it is marked as medium value; if it is less than or equal to the second value threshold, it is marked as low value. A second value assessment is performed on the slag phase in the second separation result. If the preset value condition is met, it is considered high value; otherwise, it is considered low value. Based on the product composition of the low-value product in the second separation result, a second temperature control gradient is determined, and the low-value product is subjected to a second temperature control separation to obtain a third separation result.

2. The method for treating high-temperature calcined aluminum ash according to claim 1, characterized in that, The reaction was compared with the preset ideal target, and the initial magnetic field strength was dynamically adjusted until the reaction was completed, yielding the second separation result, including: Calculate the rate of change of aluminum droplet size and the rate of change of aluminum droplet purity per unit time based on the reaction situation, and derive the current comprehensive efficiency index based on the rate of change of aluminum droplet size and the rate of change of aluminum droplet purity. The current comprehensive efficiency index is compared with the maximum theoretical comprehensive efficiency index to generate an efficiency gap signal. The initial magnetic field strength of the collected data is dynamically adjusted based on the efficiency gap signal. The purity change rate is continuously monitored, and a convergence flag is triggered when its absolute value is less than a preset minimum threshold. Based on the dynamically adjusted magnetic field strength curve, the ratio of the additional energy consumption caused by the dynamic adjustment of magnetic field strength to the purity improvement value is calculated. When the ratio exceeds a preset critical threshold, the benefit lower limit flag is triggered. When the convergence flag and the benefit lower limit flag are triggered simultaneously, it is determined that the reaction has reached the optimal endpoint, and a command to terminate the reaction is immediately sent to the magnetic field module, and the reaction ends. During and after the magnetic field decay process, the molten salt, metal phase and slag phase are determined by three-phase sedimentation separation. The molten salt is then recycled, and the metal phase and slag phase constitute the second separation result.

3. The method for treating high-temperature calcined aluminum ash according to claim 1, characterized in that, The high-value and medium-value products in the metallic phase and the high-value products in the slag phase from the second separation results are matched with the corresponding usage methods in the product usage table for use.

4. The method for treating high-temperature calcined aluminum ash according to claim 1, characterized in that, The third separation result is subjected to state separation to determine the gas phase result and the solid phase result. Targeted extraction processing is then performed on the gas phase result and the solid phase result is obtained, including: The third separation result is transmitted to a cyclone separator for coarse separation to recover coarse particles. The gas and fine particles enter a high-temperature bag filter to obtain gas phase and solid phase results. The gas phase results were subjected to multi-stage gradient condensation, and the remaining gas was subjected to pressure swing adsorption to obtain the first treatment result. The solid phase results are then subjected to a selective leaching process. The compositional characteristics of the solid phase results are analyzed, and a targeted solution is prepared based on these characteristics. The solid phase results are then extracted using a targeted solution extraction-precipitation crystallization process to obtain the second processing result.

5. A high-temperature calcined aluminum ash treatment system, characterized in that, include: First separation module: acquires the aluminum ash state of the aluminum ash sample, determines the first temperature control gradient based on the aluminum ash state, performs first temperature control separation on the aluminum ash sample, and obtains the first separation result; The second separation module performs component detection on each first separation result, determines the molten salt ratio based on the detection results, determines the initial magnetic field strength of the alternating magnetic field based on the detection results, reacts the first separation result with the molten salt under the action of the initial magnetic field strength, and dynamically adjusts the initial magnetic field strength based on the reaction situation to obtain the second separation result of the molten salt. The third separation module evaluates the value of the second separation result. High-value products are used directly. The second temperature control gradient is determined based on the low-value products. The low-value products are then separated under second temperature control based on the second temperature control gradient to obtain the third separation result. Extraction and processing module: Separates the third separation result into states, determines the gas phase result and the solid phase result, and performs targeted extraction processing on the gas phase result and the solid phase result respectively to obtain the processing result; The first separation module includes: Chemical composition analysis was performed on the aluminum ash sample to determine the aluminum ash-chemical state. Physical property analysis was performed on the aluminum ash sample to determine the aluminum ash-physical state. The aluminum ash-chemical state and the aluminum ash-physical state were combined to obtain the aluminum ash state. The state of aluminum ash is input into the intelligent decision-making model. The intelligent decision-making model calls the thermodynamic database and the historical optimized process library to determine the critical reaction temperature point, the precise control strategy of the atmosphere and the reaction kinetic parameters, and generates a coordinated instruction of temperature-time-atmosphere-equipment to obtain the first temperature control gradient. The aluminum ash sample was subjected to first temperature-controlled separation based on the first temperature control gradient, and the first separation result was obtained. The second separation module includes: Rapid sample preparation is performed on the first separation result, and the components of the prepared sample are analyzed to obtain the detection results for each first separation result; Based on the test results, the corresponding molten salt ratio is matched from the composition-molten salt ratio library, and the corresponding initial magnetic field strength is matched from the composition-magnetic field strength table based on the test results. The first separation result is reacted with molten salt of the corresponding molten salt ratio under the action of an initial magnetic field strength. The reaction is monitored in real time by pre-arranged sensors, and the reaction status is determined based on the real-time monitoring results. The reaction was compared with the preset ideal target, and the initial magnetic field strength was dynamically adjusted until the reaction ended, and the molten salt and the second separation result were obtained. The third separation module includes: The metal phase in the second separation result is subjected to a first value assessment. If it is greater than the first value threshold, it is marked as high value; if it is less than or equal to the first value threshold but greater than the second value threshold, it is marked as medium value; if it is less than or equal to the second value threshold, it is marked as low value. A second value assessment is performed on the slag phase in the second separation result. If the preset value condition is met, it is considered high value; otherwise, it is considered low value. Based on the product composition of the low-value product in the second separation result, a second temperature control gradient is determined, and the low-value product is subjected to a second temperature control separation to obtain a third separation result.

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