Continuous feeding device and anti-oxidation sealed feeding method for recycled aluminum furnace

Abstract

This invention discloses a continuous feeding device for a recycled aluminum furnace, comprising a support frame and a furnace body. The support frame is equipped with a material handling mechanism, which is paired with a feeding mechanism. The feeding mechanism works in conjunction with the furnace body. The material handling mechanism includes a storage cylinder, which is fixedly mounted on the support frame. A fixing frame is fixedly mounted on the storage cylinder, and a stirring motor is mounted on the fixing frame. A first rotating shaft and a second rotating shaft are rotatably mounted inside the storage cylinder. Both the first and second rotating shafts have drive shafts at their ends near the stirring motor. In operation, the stirring motor is started, driving the first and second rotating shafts to rotate synchronously in opposite directions via a synchronous belt. This drives the staggered stirring shafts on the shafts to crush and mix the recycled aluminum material added to the storage cylinder. The material is then screened through an internal filter to ensure uniform particle size and consistent composition before entering subsequent stages, thereby effectively improving the efficiency of subsequent smelting and the stability of the alloy composition.

Description

Technical Field

[0001] This invention belongs to the field of recycled aluminum furnace technology, specifically relating to a continuous feeding device and an anti-oxidation sealed feeding method for recycled aluminum furnaces. Background Technology

[0002] In the field of recycled aluminum resource recycling, smelting is a key step in the recycled aluminum processing. Traditional recycled aluminum furnaces often use intermittent manual feeding or simple mechanical dumping, which has many limitations.

[0003] In existing recycled aluminum furnaces, materials are typically fed directly into the furnace without systematic pretreatment, resulting in uneven particle size and mixed composition. This affects smelting efficiency and the stability of alloy composition. Furthermore, traditional feeding methods lack effective sealing measures, making the materials highly susceptible to oxidation reactions when exposed to high-temperature air during transport and entry into the furnace. This leads to the loss of aluminum and alloy elements, reducing metal recovery rates, increasing energy consumption, and affecting the quality of the final aluminum ingots. In addition, the discontinuous and uncontrollable feeding process makes it difficult to match with modern automated smelting processes, thus hindering the improvement of production efficiency and process stability. Summary of the Invention

[0004] The purpose of this invention is to provide a continuous feeding device for a recycled aluminum furnace to solve the problems mentioned in the background art.

[0005] In a first aspect, the present invention provides a continuous feeding device for a recycled aluminum furnace, comprising:

[0006] The support frame 1 and the furnace body 12 are provided. The support frame 1 is provided with a material handling mechanism 2. The material handling mechanism 2 is equipped with a feeding mechanism 3. The feeding mechanism 3 is used in conjunction with the furnace body 12.

[0007] The material handling mechanism 2 includes a storage cylinder 21, which is fixedly mounted on a support frame 1. A fixing frame 22 is fixedly mounted on the storage cylinder 21, and a stirring motor 23 is mounted on the fixing frame 22. A first rotating shaft 24 and a second rotating shaft 27 are rotatably mounted inside the storage cylinder 21. A drive shaft 25 is provided at one end of the first rotating shaft 24 and the second rotating shaft 27 near the stirring motor 23. The drive shaft 25 rotatably passes through the storage cylinder 21, and a first synchronous pulley 26 and a second synchronous pulley 28 are fixedly sleeved on the outer surface of its end. The output end of the stirring motor 23 rotatably passes through the fixing frame 22, and its end is fixedly connected to the drive shaft 25 of the first synchronous pulley 26. A synchronous belt 29 is meshed on the outer surface of the first synchronous pulley 26 and the second synchronous pulley 28. A plurality of stirring shafts 212 are fixedly mounted on the outer surface of the first rotating shaft 24 and the second rotating shaft 27.

[0008] In one possible implementation of the first aspect, a filter screen 213 is installed inside the storage cylinder 21, and the stirring shafts 212 on the first rotating shaft 24 and the second rotating shaft 27 are designed in an alternating manner.

[0009] In one possible implementation of the first aspect, the storage cylinder 21 is provided with a funnel 214 and the storage cylinder 21 is provided with a feed inlet 211.

[0010] In one possible implementation of the first aspect, the feeding mechanism 3 includes a feeding conduit 31, a support plate 11 is fixedly installed on the support frame 1, the feeding conduit 31 is fixedly inserted into the support plate 11, a feeding shaft 32 is rotatably inserted inside the feeding conduit 31, a spiral blade 33 is fixedly provided on the outer surface of the feeding shaft 32, a feeding motor 34 is fixedly installed on the outer surface of the feeding conduit 31, and the output end of the feeding motor 34 is fixedly connected to the feeding shaft 32.

[0011] In one possible implementation of the first aspect, the feeding conduit 31 is provided with a feeding port 35, and the funnel 214 is used in conjunction with the feeding port 35.

[0012] In one possible implementation of the first aspect, the end of the feeding conduit 31 away from the feeding motor 34 is used in conjunction with the furnace body 12.

[0013] Compared with the prior art, the present invention provides a continuous feeding device for a recycled aluminum furnace, which has the following beneficial effects:

[0014] 1. When in use, start the stirring motor, and drive the first and second rotating shafts to rotate synchronously in opposite directions through the synchronous belt. This drives the staggered stirring shafts on them to crush and mix the recycled aluminum material added to the storage cylinder. Then, the material is screened through an internal filter to ensure that the material entering the subsequent stages has uniform particle size and consistent composition, thereby effectively improving the efficiency of subsequent smelting and the stability of alloy composition.

[0015] 2. After processing, the qualified material enters the feeding conduit through a funnel. The feeding motor is started to drive the feeding shaft and spiral blades to rotate, continuously and stably pushing the material to the furnace body. This conveying process is continuous and controllable. By maintaining the sealed state at the connection between the storage cylinder and the feeding conduit, the contact between the material and high-temperature air during the conveying process is significantly reduced, thereby reducing the oxidation loss of aluminum and alloy elements and improving the metal recovery rate and the quality of the final product.

[0016] Secondly, the present invention provides an anti-oxidation sealed feeding method for a continuous feeding device of a recycled aluminum furnace, comprising:

[0017] The particle size data of recycled aluminum material is measured, and a sample of the composition of recycled aluminum material is collected. Based on the particle size data, the feeding capacity of the recycled aluminum material is analyzed.

[0018] The content of the corresponding components in the material composition sample is measured, and the material composition sample is subjected to an oxidation test to obtain the oxidation rate. The oxidation risk level of the recycled aluminum material is determined by combining the oxidation rate and the content of the components.

[0019] Based on the oxidation risk level and the feeding capacity, the conveying speed parameters corresponding to the feeding motor are determined. Based on the material particle size data, the stirring speed parameters corresponding to the stirring motor are set. Combining the conveying speed parameters and the stirring speed parameters, continuous sealed feeding of the recycled aluminum material is performed. During the feeding process, the connection between the storage cylinder and the feeding conduit is kept sealed to achieve anti-oxidation sealed feeding.

[0020] In one possible implementation of the second aspect, calculating the feedability rate of the recycled aluminum material based on the material particle size data includes:

[0021] Identify the maximum particle size and dominant particle size range corresponding to the material particle size data;

[0022] Obtain the mesh size corresponding to the filter screen;

[0023] Based on the maximum particle size, the dominant particle size range, and the mesh size, the theoretical sieve throughput of the recycled aluminum material is calculated.

[0024] The internal structure of the storage cylinder and the operating characteristics of the stirring shaft are obtained. Combined with the theoretical sieve passing rate, the material flow resistance coefficient of the recycled aluminum material is calculated.

[0025] By combining the theoretical sieve throughput with the material flow resistance coefficient, the feed throughput of recycled aluminum material is calculated.

[0026] In one possible implementation of the second aspect, measuring the component content corresponding to the material component sample includes:

[0027] The material component sample was dissolved and diluted to a fixed volume to obtain the test solution;

[0028] The solution to be tested is analyzed to obtain the element types and signal intensity data corresponding to the material composition sample;

[0029] Based on the element types, the signal intensity data is compared with a standard substance database to determine the mass fraction of each element corresponding to the material composition sample;

[0030] Based on the mass fraction of the element, the component content corresponding to the material component sample is determined.

[0031] In one possible implementation of the second aspect, the oxidation test treatment of the material component sample to obtain the oxidation rate includes:

[0032] The material composition sample was placed in an oxidation test environment at a preset temperature.

[0033] Record the initial mass of the material component sample in the oxidation test environment and the real-time mass at multiple consecutive time points;

[0034] Based on the initial mass and the real-time mass, the total mass increment of the material composition sample during the test period is calculated;

[0035] Combining the mass increment and the test cycle, the oxidation rate corresponding to the material component sample is calculated using the following formula:

[0036]

[0037] in, This indicates the oxidation rate corresponding to the material composition sample. t represents the total mass increment, t represents the test period, and S represents the surface area of ​​the material composition sample.

[0038] As can be seen, this invention calculates the feedability rate of recycled aluminum material based on the particle size data, thereby obtaining an estimated estimate of the smoothness of the recycled aluminum material's passage through subsequent processing and conveying stages. This provides a direct quantitative reference for determining the conveying speed parameters corresponding to the feeding motor. By measuring the component content of the material sample, this invention can clarify the specific chemical composition of the material, providing data support for calculating the oxidation risk level of the recycled aluminum material. Specifically, the component content refers to the purity of aluminum, the proportion of easily oxidized elements such as magnesium, and the content of impurity elements such as silicon and iron. By combining the oxidation risk level and the feedability, this invention determines the conveying speed parameters corresponding to the feeding motor, thereby obtaining the optimal rotational speed of the spiral blades pushing material per unit time, thus balancing the relationship between feeding efficiency and oxidation loss control. Attached Figure Description

[0039] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention, but do not constitute a limitation thereof. In the drawings:

[0040] Figure 1 This is a three-dimensional structural diagram of a continuous feeding device for a recycled aluminum furnace according to an embodiment of the present invention;

[0041] Figure 2 This is a cross-sectional schematic diagram of a storage cylinder structure according to an embodiment of the present invention;

[0042] Figure 3 This is a cross-sectional schematic diagram of the feeding conduit structure according to an embodiment of the present invention;

[0043] Figure 4 Flowchart of an anti-oxidation sealed feeding method for a continuous feeding device for a recycled aluminum furnace according to an embodiment of the invention;

[0044] In the diagram: 1. Support frame; 11. Support plate; 12. Furnace body; 2. Material handling mechanism; 21. Storage cylinder; 22. Fixing frame; 23. Stirring motor; 24. First rotating shaft; 25. Transmission shaft; 26. First synchronous pulley; 27. Second rotating shaft; 28. Second synchronous pulley; 29. ​​Synchronous belt; 211. Feed inlet; 212. Stirring shaft; 213. Filter screen; 214. Funnel; 3. Feeding mechanism; 31. Feeding guide pipe; 32. Feeding shaft; 33. Spiral blade; 34. Feeding motor; 35. Feeding port. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] Please see Figure 1-3 The furnace includes a support frame 1 and a furnace body 12. The support frame 1 is equipped with a material handling mechanism 2. The material handling mechanism 2 is equipped with a feeding mechanism 3. The feeding mechanism 3 is used in conjunction with the furnace body 12.

[0047] The material handling mechanism 2 includes a storage cylinder 21, which is fixedly mounted on a support frame 1. A fixing frame 22 is fixedly mounted on the storage cylinder 21, and a stirring motor 23 is mounted on the fixing frame 22. A first rotating shaft 24 and a second rotating shaft 27 are rotatably mounted inside the storage cylinder 21. A drive shaft 25 is provided at one end of the first rotating shaft 24 and the second rotating shaft 27 near the stirring motor 23. The drive shaft 25 rotatably passes through the storage cylinder 21, and a first synchronous pulley 26 and a second synchronous pulley 28 are fixedly sleeved on the outer surface of each end. The stirring... The output end of the motor 23 rotates through the fixed frame 22, and its end is fixedly connected to the drive shaft 25 of the first synchronous pulley 26. The outer surfaces of the first synchronous pulley 26 and the second synchronous pulley 28 are fitted with a synchronous belt 29. Through the transmission action of the synchronous belt 29, the stirring motor 23 can simultaneously drive the first rotating shaft 24 and the second rotating shaft 27 to rotate synchronously. Multiple stirring shafts 212 are fixedly installed on the outer surfaces of the first rotating shaft 24 and the second rotating shaft 27. The stirring shafts 212 on the first rotating shaft 24 and the second rotating shaft 27 are staggered to enhance the crushing and mixing effect.

[0048] The storage cylinder 21 is equipped with a filter screen 213, which is used to filter out large particles of impurities in the material to prevent impurities from entering the furnace body 12 and affecting the smelting quality. At the same time, it can prevent large particles of impurities from clogging the subsequent feeding channel. The storage cylinder 21 is provided with a funnel 214 and a feed inlet 211. The feed inlet 211 is equipped with a sealing cover to seal the storage cylinder 21 and to screen the material after stirring and crushing. Only the material that meets the particle size requirements can fall into the bottom of the storage cylinder 21.

[0049] The feeding mechanism 3 includes a feeding conduit 31. A support plate 11 is fixedly installed on the support frame 1. The feeding conduit 31 is fixedly inserted into the support plate 11. A feeding shaft 32 is rotatably inserted inside the feeding conduit 31. A spiral blade 33 is fixedly installed on the outer surface of the feeding shaft 32. A feeding motor 34 is fixedly installed on the outer surface of the feeding conduit 31. The output end of the feeding motor 34 is fixedly connected to the feeding shaft 32. The spiral blade 33 fits tightly against the inner wall of the feeding conduit 31 to ensure that there is no material residue during the feeding process. At the same time, it can enhance the stability of material conveying and prevent material spillage.

[0050] The feeding conduit 31 is provided with a feeding port 35. The funnel 214 is used in conjunction with the feeding port 35 so that the processed material can smoothly enter the feeding conduit 31.

[0051] The end of the feeding conduit 31 away from the feeding motor 34 is used in conjunction with the furnace body 12 to facilitate the feeding of the processed material into the furnace body 12 for processing.

[0052] The working principle and usage process of the continuous feeding device for the recycled aluminum furnace of the present invention are as follows: In use, the material is first fed into the storage cylinder 21 through the feed inlet 211, and the feed inlet 211 is sealed with a sealing cover. The stirring motor 23 is started, and the stirring motor 23 drives the transmission shaft 25 of the first synchronous wheel 26 connected to it to rotate. Through the transmission of the synchronous belt 29, the second synchronous wheel 28 and the transmission shaft 25 connected to it rotate, thereby driving the first rotating shaft 24 and the second rotating shaft 27 to rotate synchronously. Due to the staggered design of the stirring shafts 212 on the first rotating shaft 24 and the second rotating shaft 27, the material in the storage cylinder 21 is fully stirred and mixed during the rotation. Larger particles will be intercepted by the filter screen 213, and then repeatedly stirred until the material can pass through the filter screen 213.

[0053] The mixed material falls through the funnel 214 into the feeding port 35 of the feeding guide 31. At this time, the feeding motor 34 is started, and the feeding motor 34 drives the feeding shaft 32 to rotate. The spiral blades 33 on the outer surface of the feeding shaft 32 rotate accordingly, pushing the material along the feeding guide 31 towards the furnace body 12 to achieve continuous feeding.

[0054] See Figure 4 The image shows an anti-oxidation sealed feeding method for a continuous feeding device of a recycled aluminum furnace according to an embodiment of the present invention, comprising:

[0055] S1. Measure the particle size data of the recycled aluminum material and collect a sample of the material composition of the recycled aluminum material. Based on the particle size data, calculate the feedability rate of the recycled aluminum material.

[0056] This invention calculates the feedability rate of recycled aluminum material based on the particle size data, providing an estimated estimate of the smoothness of the recycled aluminum material's passage through subsequent processing and conveying stages. This offers a direct quantitative reference for determining the conveying speed parameters of the feeding motor. The recycled aluminum material is the raw material for smelting after pretreatment of recycled waste aluminum and its alloys. The particle size data refers to the particle size and particle size distribution range of the recycled aluminum material. The material composition sample is a representative sample extracted from the recycled aluminum material for analyzing its elemental composition. The feedability rate is an estimated proportion of recycled aluminum material that can smoothly pass through the filter and enter the feeding conduit under given processing conditions. Furthermore, the particle size data of the recycled aluminum material can be measured using equipment such as a sieve analyzer or a laser particle size analyzer. The material composition sample of the recycled aluminum material can be collected using standardized sampling methods such as multi-point sampling and homogenization.

[0057] As an embodiment of the present invention, the step of calculating the feedability rate of recycled aluminum material based on the material particle size data includes:

[0058] Identify the maximum particle size and dominant particle size range corresponding to the material particle size data;

[0059] Obtain the mesh size corresponding to the filter screen;

[0060] Based on the maximum particle size, the dominant particle size range, and the mesh size, the theoretical sieve throughput of the recycled aluminum material is calculated.

[0061] The internal structure of the storage cylinder and the operating characteristics of the stirring shaft are obtained. Combined with the theoretical sieve passing rate, the material flow resistance coefficient of the recycled aluminum material is calculated.

[0062] By combining the theoretical sieve throughput with the material flow resistance coefficient, the feed throughput of recycled aluminum material is calculated.

[0063] Wherein, the maximum particle size is the size of the largest particle in the recycled aluminum material; the dominant particle size range is the particle size range in which the particles that account for the majority of the recycled aluminum material are located; the mesh size is the maximum square aperture that the filter screen allows to pass through; the theoretical sieving rate is the theoretical proportion of material that can pass through, calculated solely based on the relationship between particle size and mesh size; the internal structure refers to the structural features that affect the material's descent, such as the inner cavity shape of the storage cylinder and the tilt angle of the funnel; the operational characteristics are the influence characteristics of the rotational speed of the stirring shaft and the spatial arrangement of the staggered stirring shafts on the material flow pattern; the material flow resistance coefficient is a correction factor introduced to consider the obstruction effect of the internal structure of the equipment and the stirring action on the material flow; and the feed passability rate is an estimated value of the actual proportion of material that can pass through, obtained by combining theoretical sieving and flow resistance.

[0064] Optionally, statistical analysis is performed on the particle size data of the material to identify the maximum particle size value and the dominant particle size range with the highest proportion; the exact mesh size of the filter screen is obtained by consulting equipment drawings or direct measurement; the maximum particle size and the median particle size of the dominant particle size range are compared with the mesh size, and the theoretical screening rate is calculated based on the screening principle; the internal structure drawings of the storage cylinder are analyzed, and the rated speed of the stirring motor and the layout of the stirring shaft are combined to evaluate the agitation and possible bridging effects on the falling material, and the material flow resistance coefficient is calculated accordingly; the theoretical screening rate is multiplied by (1 minus the material flow resistance coefficient) to obtain the feedability rate of the recycled aluminum material.

[0065] S2. Measure the content of the corresponding components in the material composition sample, perform an oxidation test on the material composition sample to obtain the oxidation rate, and determine the oxidation risk level of the recycled aluminum material by combining the oxidation rate and the content of the components.

[0066] This invention, by measuring the component content of the material sample, can clarify the specific chemical composition of the material, providing data support for calculating the oxidation risk level of recycled aluminum materials. Specifically, the component content refers to the purity of aluminum, the proportion of easily oxidized elements such as magnesium, and the content of impurity elements such as silicon and iron.

[0067] As an optional embodiment of the present invention, measuring the component content corresponding to the material component sample includes:

[0068] The material component sample was dissolved and diluted to a fixed volume to obtain the test solution;

[0069] The solution to be tested is analyzed to obtain the element types and signal intensity data corresponding to the material composition sample;

[0070] Based on the element types, the signal intensity data is compared with a standard substance database to determine the mass fraction of each element corresponding to the material composition sample;

[0071] Based on the mass fraction of the element, the component content corresponding to the material component sample is determined.

[0072] The test solution is a homogeneous liquid sample that has been dissolved and diluted to a suitable volume and can be directly used for component analysis; the signal intensity data is the raw reading of characteristic signals (such as spectral intensity and mass spectrometry peak height) generated by element atoms or ions in the test solution through excitation and acquisition by a component analysis instrument; the standard material database is a calibration reference set that stores characteristic signal intensity data corresponding to a series of standard solutions of known concentrations under the same detection conditions; the element mass fraction is the percentage of the mass of a certain element in the material component sample relative to the total mass of the sample.

[0073] Furthermore, the material component sample can be digested under heating conditions using nitric acid, hydrochloric acid, or a mixture of acids to complete dissolution. The solution is then transferred to a volumetric flask and diluted to the mark with deionized water to obtain the test solution. An inductively coupled plasma atomic emission spectrometer (ICP-AES) or an ICP-AES mass spectrometer can be used as the component analysis instrument to detect the test solution. The standard substance database is usually built into the control software of the component analysis instrument, or it can be created by the operator after measuring a series of standard solutions. The signal intensity data obtained from the test solution is input into the instrument software. The software uses the standard substance database to draw a calibration curve and calculates the concentration of each element in the test solution. Combined with the diluted volume and sample weight, the mass fraction of each element in the material component sample is calculated, and finally, the complete component content is summarized.

[0074] This invention obtains the oxidation rate by performing oxidation tests on the material composition samples, which allows for the determination of the oxidation tendency of the recycled aluminum material under heating conditions. This provides a crucial basis for determining the corresponding conveying speed parameters of the feeding motor, thereby shortening the time the material is exposed to high-temperature air during the feeding process.

[0075] The component content refers to the mass percentage of major elements such as aluminum, magnesium, silicon, and copper, as well as impurity elements, in the material sample. The oxidation test is an accelerated oxidation experiment conducted on the sample under simulated high-temperature oxidation conditions at the front end of a furnace. The oxidation rate is the data on the weight increase or the increase in specific oxide layer thickness of the material sample due to the oxidation reaction per unit time. Furthermore, the measurement of the component content of the material sample can be achieved using a spectrometer. The oxidation test can be achieved by placing the sample in a box-type resistance furnace at a set temperature and holding it for a specific time before weighing it, or by recording its mass change curve under a certain temperature program using a thermogravimetric analyzer.

[0076] As an embodiment of the present invention, the oxidation test treatment of the material component sample to obtain the oxidation rate includes:

[0077] The material composition sample was placed in an oxidation test environment at a preset temperature.

[0078] Record the initial mass of the material component sample in the oxidation test environment and the real-time mass at multiple consecutive time points;

[0079] Based on the initial mass and the real-time mass, the total mass increment of the material composition sample during the test period is calculated;

[0080] Combining the mass increment and the test cycle, the oxidation rate corresponding to the material component sample is calculated using the following formula:

[0081]

[0082] in, This indicates the oxidation rate corresponding to the material composition sample. t represents the total mass increment, t represents the test period, and S represents the surface area of ​​the material composition sample.

[0083] The preset temperature condition is a constant temperature value set to simulate the temperature environment near the inlet of the feeding conduit or in the preheating zone of the furnace; the oxidation test environment is a heating space that provides constant temperature and controllable air circulation; the initial mass is the mass of the material component sample before it is placed in the oxidation test environment; the real-time mass is the total mass of the material component sample, including oxidation products, measured at a specific moment during the oxidation test; the total mass increment is the sum of the differences between the real-time mass and the initial mass; the test period is the total time elapsed from the start of the test to the recording of the real-time mass; and the surface area is the surface area of ​​the material component sample in contact with the oxidizing atmosphere.

[0084] Optionally, the prepared material composition sample is placed in a box-type resistance furnace or a thermogravimetric analyzer sample pan that has been heated to the preset temperature. The initial mass of the sample is weighed using a precision balance before it is placed in the sample, and then quickly removed and cooled and weighed after a set time interval, or continuously recorded using a thermogravimetric analyzer to obtain the real-time mass at multiple time points. The initial mass is subtracted from the real-time mass at each time point and the results are summed to obtain the total mass increment.

[0085] This invention determines the oxidation risk level of recycled aluminum materials by combining the oxidation rate and the component content. This allows for a comprehensive quantification of the likelihood of significant oxidation loss in the subsequent smelting and feeding stages, thus providing clear guidance for adjusting the operating conditions of material handling and transportation. Specifically, the oxidation risk level is a qualitative or semi-quantitative classification of the degree of oxidation of the recycled aluminum materials during their processing and transportation in the continuous feeding device to the furnace.

[0086] As an optional embodiment of the present invention, determining the oxidation risk level of recycled aluminum material by combining the oxidation rate and the component content includes:

[0087] Obtain the oxidation influence factor coefficients corresponding to various metal elements in the recycled aluminum material;

[0088] Based on the oxidation rate, the component content, and the oxidation influence factor coefficient, the oxidation risk coefficient of the recycled aluminum material is calculated:

[0089]

[0090] in, This indicates the oxidation risk coefficient of recycled aluminum materials. Indicates the oxidation rate, This represents the oxidation influence factor coefficient of the i-th metallic element in recycled aluminum materials. This indicates the content of the i-th metal element in the recycled aluminum material, where i represents the metal element sequence number in the recycled aluminum material, and n represents the number of metal elements in the recycled aluminum material.

[0091] Based on the oxidation risk coefficient, the oxidation risk level of the recycled aluminum material is determined.

[0092] The oxidation influence factor coefficient is a pre-calibrated weighted parameter based on the degree of thermodynamic and kinetic influence of different metal elements on the oxidation process of aluminum matrix; the oxidation risk coefficient is a dimensionless calculated value that comprehensively quantifies the oxidation tendency of materials.

[0093] Furthermore, the oxidation influence factor coefficients of various metal elements in the recycled aluminum material can be obtained by consulting a preset metallurgical material data handbook or by conducting a standard oxidation comparison experiment; based on the oxidation risk coefficient, the oxidation risk level of the recycled aluminum material can be determined, such as by comparing the oxidation risk coefficient with a preset risk threshold range, and determining it as a "low", "medium" or "high" risk level according to the range it is in.

[0094] S3. Based on the oxidation risk level and the feeding capacity, determine the conveying speed parameter corresponding to the feeding motor. Based on the material particle size data, set the stirring speed parameter corresponding to the stirring motor. Combine the conveying speed parameter and the stirring speed parameter to perform continuous sealed feeding of the recycled aluminum material. During the feeding process, maintain the sealed state at the connection between the storage cylinder and the feeding conduit to achieve anti-oxidation sealed feeding.

[0095] This invention determines the conveying speed parameter corresponding to the feeding motor by combining the oxidation risk level and the material throughput capacity, thereby obtaining the optimal rotational speed value of the spiral blades pushing material per unit time, to balance the relationship between feeding efficiency and oxidation loss control. The conveying speed parameter is the specific rotational speed command value that drives the spiral blades to rotate when the feeding motor is running. Furthermore, it is necessary to fully consider the degree of material oxidation reflected by the oxidation risk level; a higher level indicates a faster and potentially deeper oxidation reaction when the material is exposed to a high-temperature gas flow. Simultaneously, it is necessary to assess the likelihood of the material passing smoothly through the device, represented by the material throughput capacity. For high-risk materials, a relatively higher conveying speed needs to be set to shorten the material's transmission time from the feed port to the furnace body, reducing its time in the high-temperature oxidation environment. For materials with high material throughput capacity, their good fluidity and resistance to clogging provide conditions for using a higher conveying speed. Considering both factors, a specific conveying speed value that meets the material feeding requirements while keeping the oxidation risk within an acceptable range can be finally determined by consulting the process manual.

[0096] This invention combines the conveying speed parameters and the stirring speed parameters to perform continuous sealed feeding of the recycled aluminum material, ensuring coordinated matching between material handling and conveying processes, and achieving a smooth transition from crushing and mixing to quantitative feeding. Based on the material particle size data, the stirring speed parameters corresponding to the stirring motor are set. According to information such as the size and uniformity of the material particles and the presence of large foreign objects, the required force and frequency for the stirring shaft to crush and mix the material can be determined. For example, for materials with coarser particles and more lumps, a relatively higher stirring speed is needed to provide sufficient shearing and impact force for effective crushing; while for materials with finer particles and preliminary crushing, the stirring speed can be appropriately reduced to ensure uniform mixing while avoiding excessive crushing that produces fine powder and unnecessary energy consumption. The stirring speed parameters are the specific speed settings for the stirring motor driving the first and second rotating shafts. Combining the conveying speed parameters and the stirring speed parameters, continuous sealed feeding is performed by first starting the stirring motor according to the set stirring speed parameters to process the recycled aluminum material added to the storage cylinder; then, the feeding motor is started according to the set conveying speed parameters. The processed material falls through the funnel into the feeding conduit and is continuously and stably conveyed to the furnace body under the propulsion of the spiral blades. Throughout the feeding process, it is necessary to ensure a tight seal at the connection between the lower opening of the funnel and the feeding port. This is typically achieved using a flange connection with a high-temperature resistant gasket or a flexible sealing sleeve to effectively prevent large-scale infiltration of external air, thereby creating a relatively isolated microenvironment along the material conveying path and achieving anti-oxidation sealed feeding.

[0097] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A continuous feeding device for a recycled aluminum furnace, comprising a support frame (1) and a furnace body (12), characterized in that: The support frame (1) is provided with a material handling mechanism (2), and the material handling mechanism (2) is equipped with a feeding mechanism (3). The feeding mechanism (3) is used in conjunction with the furnace body (12). The material handling mechanism (2) includes a storage cylinder (21), which is fixedly mounted on a support frame (1). A fixing frame (22) is fixedly mounted on the storage cylinder (21), and a stirring motor (23) is mounted on the fixing frame (22). A first rotating shaft (24) and a second rotating shaft (27) are rotatably mounted inside the storage cylinder (21). A drive shaft (25) is provided at the end of the first rotating shaft (24) and the second rotating shaft (27) near the stirring motor (23). The drive shaft (25) rotates... The material storage cylinder (21) is driven through, and a first synchronous wheel (26) and a second synchronous wheel (28) are fixedly sleeved on the outer surface of its end. The output end of the stirring motor (23) rotates through the fixed frame (22), and its end is fixedly connected to the drive shaft (25) of the first synchronous wheel (26). The outer surfaces of the first synchronous wheel (26) and the second synchronous wheel (28) are fitted with a synchronous belt (29). Multiple stirring shafts (212) are fixedly installed on the outer surfaces of the first rotating shaft (24) and the second rotating shaft (27).

2. The continuous feeding device for the recycled aluminum furnace as described in claim 1, characterized in that, The storage cylinder (21) is equipped with a filter screen (213), and the stirring shafts (212) on the first rotating shaft (24) and the second rotating shaft (27) are designed in an alternating manner.

3. The continuous feeding device for the recycled aluminum furnace as described in claim 1, characterized in that, The storage cylinder (21) is provided with a funnel (214) and a feed inlet (211) is provided on the storage cylinder (21).

4. The continuous feeding device for the recycled aluminum furnace as described in claim 3, characterized in that, The feeding mechanism (3) includes a feeding conduit (31), a support plate (11) is fixedly installed on the support frame (1), the feeding conduit (31) is fixedly inserted on the support plate (11), a feeding shaft (32) is rotatably inserted inside the feeding conduit (31), a spiral blade (33) is fixedly installed on the outer surface of the feeding shaft (32), a feeding motor (34) is fixedly installed on the outer surface of the feeding conduit (31), and the output end of the feeding motor (34) is fixedly connected to the feeding shaft (32).

5. The continuous feeding device for the recycled aluminum furnace as described in claim 4, characterized in that, The feeding conduit (31) is provided with a feeding port (35), and the funnel (214) is used in conjunction with the feeding port (35).

6. The continuous feeding device for the recycled aluminum furnace as described in claim 4, characterized in that, The end of the feeding conduit (31) away from the feeding motor (34) is used in conjunction with the furnace body (12).

7. A continuous feeding device for a recycled aluminum furnace according to any one of claims 1 to 6, wherein the device performs an anti-oxidation sealed feeding method, characterized in that, The method includes: The particle size data of recycled aluminum material is measured, and a sample of the composition of recycled aluminum material is collected. Based on the particle size data, the feeding capacity of the recycled aluminum material is analyzed. The content of the corresponding components in the material composition sample is measured, and the material composition sample is subjected to an oxidation test to obtain the oxidation rate. The oxidation risk level of the recycled aluminum material is determined by combining the oxidation rate and the content of the components. Based on the oxidation risk level and the feeding capacity, the conveying speed parameters corresponding to the feeding motor are determined. Based on the material particle size data, the stirring speed parameters corresponding to the stirring motor are set. Combining the conveying speed parameters and the stirring speed parameters, continuous sealed feeding of the recycled aluminum material is performed. During the feeding process, the connection between the storage cylinder and the feeding conduit is kept sealed to achieve anti-oxidation sealed feeding.

8. The method according to claim 7, characterized in that, The calculation of the feedability rate of recycled aluminum material based on the particle size data includes: Identify the maximum particle size and dominant particle size range corresponding to the material particle size data; Obtain the mesh size corresponding to the filter screen; Based on the maximum particle size, the dominant particle size range, and the mesh size, the theoretical sieve throughput of the recycled aluminum material is calculated. The internal structure of the storage cylinder and the operating characteristics of the stirring shaft are obtained. Combined with the theoretical sieve passing rate, the material flow resistance coefficient of the recycled aluminum material is calculated. By combining the theoretical sieve throughput with the material flow resistance coefficient, the feed throughput of recycled aluminum material is calculated.

9. The method according to claim 7, characterized in that, The measurement of the component content corresponding to the material component sample includes: The material component sample was dissolved and diluted to a fixed volume to obtain the test solution; The solution to be tested is analyzed to obtain the element types and signal intensity data corresponding to the material composition sample; Based on the element types, the signal intensity data is compared with a standard substance database to determine the mass fraction of each element corresponding to the material composition sample; Based on the mass fraction of the element, the component content corresponding to the material component sample is determined.

10. The method according to claim 7, characterized in that, The oxidation test treatment of the material component sample to obtain the oxidation rate includes: The material composition sample was placed in an oxidation test environment at a preset temperature. Record the initial mass of the material component sample in the oxidation test environment and the real-time mass at multiple consecutive time points; Based on the initial mass and the real-time mass, the total mass increment of the material composition sample during the test period is calculated; Combining the mass increment and the test cycle, the oxidation rate corresponding to the material component sample is calculated using the following formula: in, This indicates the oxidation rate corresponding to the material composition sample. t represents the total mass increment, t represents the test period, and S represents the surface area of ​​the material composition sample.

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