Secondary aluminum smelting method for new energy automobile parts and production line of secondary aluminum smelting method

Abstract

The invention provides a secondary aluminum smelting method for new energy automobile parts and a production line of the secondary aluminum smelting method. The secondary aluminum smelting method for the new energy automobile parts comprises the following steps that a recyclable aluminum alloy material is obtained; the recoverable aluminum alloy material and the pure aluminum material are weighed according to the initial proportion and put into a master smelting furnace for smelting operation, and primary molten aluminum is obtained; slag removal operation is conducted on the primary molten aluminum; the primary molten aluminum obtained after deslagging operation flows to a plurality of alloy smelting furnaces; acquiring multiple pieces of target trademark element data in one-to-one correspondence with the aluminum alloy materials of the multiple target trademarks; the molten aluminum of each alloy smelting furnace is sampled and detected, and detection element data is obtained; comparing each piece of detection element data with the corresponding target trademark element data; and whether molten aluminum of the corresponding alloy smelting furnace needs to be blended or not is judged according to the comparison result of each element. And the production efficiency of the molten aluminum and the accuracy of the proportion of the molten aluminum are well improved, so that the quality of the molten aluminum is effectively improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of aluminum alloy die-casting production, and in particular to a recycled aluminum smelting method for new energy vehicle parts and a production line thereof. Background Art

[0002] Aluminum alloy die castings are widely used in the automotive field, mainly including engine components, transmission systems and body structural parts, etc. Among them, aluminum alloy die casting technology is a molding process under high temperature and high pressure environment, which can efficiently transform aluminum alloy materials into aluminum alloy die castings with high strength and high toughness, that is, automotive parts.

[0003] Nowadays, with the rapid development of new energy vehicles, the application of aluminum alloy die-castings as exclusive components of new energy vehicles has become more prominent in new energy vehicles, such as motor housings, body structural parts, etc.; at the same time, under the background of sustainable development of energy conservation and emission reduction, energy conservation and cost reduction, how to use the recyclable aluminum alloy materials such as nozzle materials, tertiary materials, aluminum chips and aluminum wire generated in the manufacturing process of aluminum alloy die-castings for recycling and reuse, and to meet the higher performance requirements of manufacturing aluminum alloy die-castings, which poses a higher challenge to the recycled aluminum alloy smelting process of aluminum alloy die-casting manufacturers.

[0004] Based on the traditional recycled aluminum alloy smelting process, in the actual smelting process of recyclable aluminum alloy materials, on-site production personnel need to rely on manual experience to put the two materials into the smelting furnace for smelting according to the ratio of recyclable aluminum alloy materials and pure aluminum materials. This cannot accurately ensure the ratio of aluminum liquid, making it difficult for the content of each metal element in the aluminum liquid to meet the element composition requirements of the target grade of aluminum alloy materials, such as European grade AlSi10MnMg aluminum alloy, American grade A360 aluminum alloy and A380 aluminum alloy;

[0005] The above-mentioned smelting method not only has low production efficiency, but also has poor quality of aluminum liquid obtained by the proportioning, which easily causes quality defects of aluminum alloy die-castings formed by subsequent die-casting, such as sand holes, interlayers, delamination and poor density of the products. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a recycled aluminum smelting method and production line for new energy vehicle parts that can better improve the production efficiency and quality of molten aluminum, thereby ensuring the quality of aluminum alloy die-castings subsequently die-cast from the molten aluminum.

[0007] The purpose of this disclosure is achieved through the following technical solutions:

[0008] A method for smelting recycled aluminum for new energy vehicle parts, comprising:

[0009] S101, obtaining recyclable aluminum alloy materials;

[0010] S103, weighing the recyclable aluminum alloy material and the pure aluminum material according to an initially set ratio, and putting them into a mother furnace for smelting operation to obtain primary aluminum liquid;

[0011] S105, performing a slag removal operation on the primary aluminum liquid;

[0012] S107, transferring the primary aluminum liquid after the slag removal operation to multiple alloy melting furnaces respectively;

[0013] S109, obtaining multiple target grade element data corresponding to multiple target grade aluminum alloy materials one by one;

[0014] S111, sampling and testing the aluminum liquid in each alloy melting furnace to obtain test element data;

[0015] S113, comparing each detected element data with the corresponding target grade element data;

[0016] S115, judging whether it is necessary to prepare the corresponding aluminum liquid in the alloy melting furnace according to the comparison result of each element;

[0017] S117, if yes, then the aluminum liquid in the corresponding alloy melting furnace is adjusted according to each element comparison result; if no, then the aluminum liquid in the corresponding alloy melting furnace is transferred to the holding furnace to obtain the target aluminum liquid;

[0018] S119, repeat steps S111 to S117 until the target aluminum liquid is obtained.

[0019] In one embodiment, the specific steps of the smelting operation are:

[0020] Controlling the mother furnace to preheat the recyclable aluminum alloy material and the pure aluminum material;

[0021] Adjust the smelting temperature of the mother furnace to a low fire of 0℃-250℃ for 60 minutes;

[0022] Adjust the smelting temperature of the mother furnace to medium fire 250℃-450℃, and the duration is 60min;

[0023] Adjust the smelting temperature of the mother furnace to high fire 450℃-750℃ for 60 minutes.

[0024] In one embodiment, before the step of performing a slag removal operation on the primary aluminum liquid, the secondary aluminum smelting method further includes:

[0025] The primary aluminum liquid is stirred.

[0026] In one embodiment, before the step of sampling the aluminum liquid in each alloy melting furnace, the secondary aluminum smelting method further includes:

[0027] Adding a refining agent to the corresponding aluminum liquid in the alloy melting furnace, wherein the amount of the refining agent accounts for 0.2%-0.4% of the weight of the aluminum liquid in the alloy melting furnace;

[0028] The aluminum liquid in the alloy melting furnace is refined.

[0029] In one embodiment, after the step of sampling the aluminum liquid in each alloy melting furnace and before the step of detecting, the secondary aluminum smelting method further includes:

[0030] The sampled aluminum liquid is cooled and formed into an aluminum block to be tested;

[0031] The aluminum block to be inspected is subjected to a turning operation so that the aluminum block to be inspected forms a plane to be inspected.

[0032] In one of the embodiments, the plane to be detected is subjected to component detection, and the component detection is performed by a direct reading spectrometer to obtain element content detection data.

[0033] In one embodiment, the specific steps of preparing the aluminum liquid in the alloy melting furnace according to each element comparison result are:

[0034] Establish aluminum liquid element control data table;

[0035] Obtaining the weight value of the aluminum liquid in the alloy melting furnace;

[0036] Importing the weight value of the aluminum liquid in the alloy melting furnace and the element content detection data into the aluminum liquid element control data table to obtain an element ratio quantitative table;

[0037] According to the element ratio quantitative table, select the material to add the corresponding element or add the pure aluminum material for neutralization.

[0038] In one of the embodiments, when sampling the aluminum liquid in each of the alloy melting furnaces, the temperature of the aluminum liquid in the corresponding alloy melting furnace is controlled between 690°C and 700°C.

[0039] A recycled aluminum smelting production line for new energy vehicle parts, which adopts the recycled aluminum smelting method for new energy vehicle parts described in any of the above embodiments to smelt target aluminum liquid. The recycled aluminum smelting production line for new energy vehicle parts includes a mother melting furnace and multiple alloy melting furnaces; the furnace chamber of the mother melting furnace is connected to the furnace chamber of each of the alloy melting furnaces through a primary flow channel, and the horizontal height of the mother melting furnace is higher than the horizontal height of each of the alloy melting furnaces.

[0040] In one embodiment, the recycled aluminum smelting production line for new energy vehicle parts also includes multiple insulation furnaces, each of the alloy melting furnaces is connected to the corresponding alloy melting furnace through a secondary flow channel, the horizontal height of each alloy melting furnace is higher than the horizontal height of the corresponding insulation furnace, and the insulation furnace is used to insulate and store aluminum liquid.

[0041] Compared with the prior art, the present invention has at least the following advantages:

[0042] 1. Before the smelting operation, the recycled aluminum smelting method disclosed in the present invention weighs the recyclable aluminum alloy material and the pure aluminum material according to the initial ratio, that is, the smelting ratio of the recyclable aluminum alloy material and the pure aluminum material is accurately controlled in the early stage of smelting, in order to provide guarantee for the subsequent production quality of aluminum liquid, and effectively replace the method of feeding relying on manual experience.

[0043] 2. The regenerated aluminum smelting method disclosed in the present invention transfers the primary aluminum liquid after the slag removal operation into an alloy furnace, and then samples, detects and compares the aluminum liquids in multiple alloy furnaces respectively, so as to determine whether the aluminum liquid in the alloy furnace needs to be adjusted until the target aluminum liquid is obtained. That is, different grades of aluminum liquid can be adjusted simultaneously through multiple alloy furnaces, and the target aluminum liquid is pre-stored in a holding furnace, thereby greatly improving the production efficiency of aluminum liquid and the accuracy of the aluminum liquid ratio, thereby effectively improving the quality of aluminum liquid, thereby better ensuring the quality of subsequent die-cast aluminum alloy die-castings. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0045] Figure 1 A partial flow chart of a method for smelting recycled aluminum for new energy vehicle parts in one embodiment;

[0046] Figure 2 Another partial flow chart of the method for smelting recycled aluminum for new energy vehicle parts in one embodiment;

[0047] Figure 3 This is a schematic diagram of the structure of a recycled aluminum smelting production line for new energy vehicle parts in one embodiment;

[0048] Figure 4 This is the control table of main metal elements of aluminum alloy;

[0049] Figure 5This is the main metal element detection table of aluminum alloy in raw material warehouse;

[0050] Reference numerals: mother melting furnace 100 ; alloy melting furnace 200 ; primary launder 300 ; holding furnace 400 ; secondary launder 500 ; turnover launder 600 ; continuous degassing device 700 ; ingot production line 800 . DETAILED DESCRIPTION

[0051] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the inventive content of the present disclosure more thoroughly and comprehensively understood.

[0052] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0054] The present invention provides a method for smelting recycled aluminum for new energy vehicle parts, comprising the following steps: S101, obtaining a recyclable aluminum alloy material; S103, weighing the recyclable aluminum alloy material and the pure aluminum material according to an initial ratio, and putting them into a mother furnace for smelting to obtain a primary aluminum liquid; S105, performing a slag removal operation on the primary aluminum liquid; S107, transferring the primary aluminum liquid after the slag removal operation to multiple alloy furnaces respectively; S109, obtaining multiple target grade element data corresponding to multiple target grades of aluminum alloy materials one by one; S111, respectively performing a slag removal operation on each target grade of aluminum alloy materials; S112, performing a slag removal operation on each target grade of aluminum alloy materials; S113, performing a slag removal operation on each target grade of aluminum alloy materials; S114, performing a slag removal operation on each target grade of aluminum alloy materials; S115, performing a slag removal operation on the primary aluminum liquid; S116, performing a slag removal operation on each target grade of aluminum alloy materials; S117, performing a slag removal operation on each target grade of aluminum alloy materials; S118, performing a slag removal operation on each target grade of aluminum alloy materials; S119, performing a slag removal operation on each target grade of aluminum alloy materials; S120, performing a slag removal operation on the primary aluminum liquid; S121, performing a slag removal operation on the primary aluminum liquid; S122, performing a slag removal operation on the primary aluminum liquid; S123, performing a slag removal operation on the primary aluminum liquid; S124, performing a slag removal operation on the primary aluminum liquid; S125, performing a slag removal operation on the primary aluminum liquid; S126, performing a slag removal operation on the primary aluminum liquid; S127, performing a slag removal operation on the primary aluminum liquid; S128, performing a slag removal operation on the primary aluminum liquid; S129, performing a slag removal operation on the The aluminum liquid in the alloy furnace is sampled and tested to obtain the test element data; S113, each test element data is compared with the corresponding target grade element data; S115, according to each element comparison result, it is determined whether the corresponding aluminum liquid in the alloy furnace needs to be adjusted; S117, if so, the aluminum liquid in the corresponding alloy furnace is adjusted according to each element comparison result; if not, the aluminum liquid in the corresponding alloy furnace is transferred to the holding furnace to obtain the target aluminum liquid; S119, repeating steps S111 to S117 until the target aluminum liquid is obtained.

[0055] The regenerated aluminum smelting method disclosed in the present invention weighs the recyclable aluminum alloy material and the pure aluminum material according to the initial ratio before the smelting operation, that is, the smelting ratio of the recyclable aluminum alloy material and the pure aluminum material is accurately controlled in the early stage of smelting, in order to provide guarantee for the production quality of the subsequent aluminum liquid, and effectively replaces the method of feeding based on manual experience. The regenerated aluminum smelting method disclosed in the present invention transfers the primary aluminum liquid after the slag removal operation to the alloy melting furnace, and then samples, detects and compares the aluminum liquid in multiple alloy melting furnaces respectively, so as to judge whether the aluminum liquid in the alloy melting furnace needs to be mixed, until the target aluminum liquid is obtained, that is, aluminum liquid of different grades can be mixed at the same time through multiple alloy melting furnaces, and the target aluminum liquid is pre-stored in the holding furnace, thereby better improving the production efficiency of the aluminum liquid and the accuracy of the aluminum liquid ratio, and then effectively improving the quality of the aluminum liquid, so as to better ensure the quality of the subsequent die-cast aluminum alloy die-castings.

[0056] See also Figure 1 and Figure 2 , which is a flow chart of a method for smelting recycled aluminum for new energy vehicle parts according to an embodiment of the present disclosure, wherein the method for smelting recycled aluminum for new energy vehicle parts comprises part or all of the following steps:

[0057] S101: Obtain recyclable aluminum alloy materials.

[0058] It can be understood that in this embodiment, the recyclable aluminum alloy materials mainly include: sprue materials, tertiary materials, aluminum chips, aluminum wires and defective castings generated in the manufacturing process of aluminum alloy die-castings. When obtaining the above-mentioned recyclable aluminum alloy materials, they are classified, stored and weighed and recorded, and at the same time, the impure non-metallic materials are screened out to provide convenience for subsequent material retrieval and material turnover.

[0059] S103: weighing the recyclable aluminum alloy material and the pure aluminum material according to an initially set ratio, and placing them into a mother furnace for smelting to obtain primary aluminum liquid.

[0060] It can be understood that by weighing the recyclable aluminum alloy materials and pure aluminum materials according to the initial ratio, the specific steps of weighing are: first, the production personnel and the material cart are weighed together once by the floor scale to obtain the tare weight; secondly, the recyclable aluminum alloy materials or pure aluminum materials are loaded separately using the material cart, and the production personnel, the material cart and the recyclable aluminum alloy materials are weighed together for a second time by the floor scale, and the total weight minus the tare weight is obtained to obtain the weight of the recyclable aluminum alloy materials; similarly, the production personnel, the material cart and the pure aluminum materials are weighed together for three times by the floor scale, and the total weight minus the tare weight is obtained to obtain the weight of the pure aluminum materials; finally, according to the initial ratio, that is, the tonnage of the recyclable aluminum alloy materials and the pure aluminum materials are estimated respectively, and the materials are fed into the mother furnace alternately in turn.

[0061] Among them, the proportion of pure aluminum materials in the total weight of the feed is much larger than the proportion of recyclable aluminum alloy materials in the total weight of the feed, which makes the aluminum metal component in the primary aluminum liquid obtained after the smelting operation account for a relatively large proportion, meeting the basic requirements for the proportion of aluminum metal component in the primary aluminum liquid; in this way, when faced with a large amount of target aluminum liquid that needs to be smelted, the production personnel weigh and put it in according to the initial ratio, which can effectively improve the smelting efficiency of the initial aluminum liquid and shorten the production cycle of the target aluminum liquid. Furthermore, in one of the embodiments, the specific steps of feeding the recyclable aluminum alloy material into the mother melting furnace are: screening the recyclable aluminum alloy material; first feeding the block-shaped recyclable aluminum alloy material with a relatively small volume and mass into the mother melting furnace for laying; then feeding the block-shaped recyclable aluminum alloy material with a relatively large volume and mass, and the pure aluminum material into the mother melting furnace in turn, so that the block-shaped recyclable aluminum alloy material with a relatively large volume and mass and the pure aluminum material are stacked on the block-shaped recyclable aluminum alloy material with a relatively small volume and mass, respectively; smelting the recyclable aluminum alloy material in the mother melting furnace to partially or completely melt the recyclable aluminum alloy material; finally feeding the filamentous or granular recyclable aluminum alloy material with a relatively small volume and mass into the mother melting furnace.

[0062] It can be understood that the use of block-shaped recyclable aluminum alloy materials with smaller volume and mass as the bedding layer of the mother furnace can form a buffering effect when the block-shaped recyclable aluminum alloy materials with larger volume and mass and the pure aluminum materials are alternately put into the mother furnace in sequence; at the same time, it is beneficial to the smelting operation, and the bedding layer can quickly absorb heat and conduct it to the upper material, thereby improving the smelting efficiency, optimizing the heat conduction effect between materials, and making the heat distribution formed by the melting of the materials more uniform; then, the filamentary or granular recyclable aluminum alloy materials with smaller volume and mass are finally put into the mother furnace. At this time, there is aluminum liquid with relatively uniform heat distribution in the mother furnace, which can avoid oxidation caused by high temperature in the early stage and the problem of melting and agglomeration caused by local uneven heating.

[0063] It should be noted that, in the present embodiment, the block-shaped recyclable aluminum alloy materials with relatively small volume and mass are usually slag-bag materials, thin-walled parts and flash materials, etc.; the block-shaped recyclable aluminum alloy materials with relatively large volume and mass are usually nozzle materials, scrapped defective materials and recycled crushed materials, etc.; the filament-shaped or granular recyclable aluminum alloy materials with relatively small volume and mass are usually aluminum wire or granular recycled materials, etc.

[0064] In one embodiment, the specific steps of the smelting operation are: controlling the mother melting furnace to preheat the recyclable aluminum alloy material and the pure aluminum material; adjusting the smelting temperature of the mother melting furnace to a low fire of 0°C-250°C for 60 minutes; adjusting the smelting temperature of the mother melting furnace to a medium fire of 250°C-450°C for 60 minutes; adjusting the smelting temperature of the mother melting furnace to a high fire of 450°C-750°C for 60 minutes.

[0065] It can be understood that, first of all, the recyclable aluminum alloy material and pure aluminum material in the mother furnace are preheated, so that the materials in the furnace are gradually heated from room temperature to a lower temperature, so as to better remove moisture and volatile organic matter adsorbed on the surface of the materials, such as oil stains, coating residues, etc.; in this way, it can effectively avoid the rapid volatilization or decomposition of moisture and organic matter at high temperature, resulting in a sudden increase in furnace pressure or the generation of harmful gases, while reducing the oxidation of aluminum liquid and the occurrence of residual impurities.

[0066] Secondly, adjust the smelting temperature of the mother furnace to low fire 0℃-250℃ for 60 minutes. Further heat the materials in the furnace to soften or partially melt the low melting point components in the recyclable aluminum alloy materials, such as aluminum foil, thin-walled parts, etc., while continuing to remove residual organic matter, so as to provide a uniform heating basis for the subsequent medium and high fire stages, thereby avoiding local overheating or material adhesion.

[0067] Next, the smelting temperature of the mother furnace is adjusted to a medium fire of 250℃-450℃ for 60 minutes. Most of the recyclable aluminum alloy materials are melted, and the pure aluminum materials begin to soften and absorb heat. At the same time, stirring or convection in the furnace promotes uniform heating of the materials, which is conducive to the full melting of the recyclable aluminum alloy materials and pure aluminum materials.

[0068] Finally, the smelting temperature of the mother furnace is adjusted to a high temperature of 450℃-750℃ for 60 minutes. The pure aluminum material is completely melted and mixed evenly with the recyclable aluminum alloy material. The hydrogen and other gas impurities in the aluminum liquid are removed by high temperature, which effectively ensures that all materials are completely melted and form aluminum liquid with uniform composition, providing high-quality melt for subsequent refining and casting.

[0069] Furthermore, when smelting recyclable aluminum alloy materials containing a lot of oil, in order to ensure that the oil and other organic impurities can be safely and thoroughly removed, to prevent the oil and other organic impurities from volatilizing or decomposing rapidly at high temperatures, generating a large amount of flammable gas, such as hydrocarbon gas, which poses a potential safety hazard to smelting. In this embodiment, the duration of the preheating treatment and the low-fire stage can be appropriately extended to allow the oil and other organic impurities to slowly volatilize or decompose at a lower temperature, thereby effectively improving the purity of the primary aluminum liquid.

[0070] S105: performing a slag removal operation on the primary aluminum liquid.

[0071] It can be understood that in this embodiment, the specific steps of the slag removal operation are: first, an electromagnet is used to perform an iron absorption operation on the primary aluminum liquid, and the iron impurities in the primary aluminum liquid are separated and adsorbed by the effect of the electromagnetic field, thereby effectively improving the purity of the primary aluminum liquid; secondly, a slag remover is added to the primary aluminum liquid, and the amount of the slag remover is 0.2%-0.4% of the weight of the aluminum liquid of the primary aluminum liquid, so that other impurities in the primary aluminum liquid are further removed by adding the slag remover, so as to further improve the purity and quality of the primary aluminum liquid; finally, a slag scraper is used to scrape the slag floating on the surface of the primary aluminum liquid to the furnace mouth of the mother furnace, and the aluminum water is filtered out at the same time, and then the slag is scraped to the slag bucket, so as to further reduce the slag content of the primary aluminum liquid, so as to further improve the purity and quality of the primary aluminum liquid, which is beneficial to the subsequent improvement of the accuracy of aluminum liquid preparation.

[0072] Furthermore, in one of the embodiments, the slag bucket containing the slag is transported to a ash roasting machine by a rotating turntable, and then the slag is roasted by the ash roasting machine, that is, through the effects of mechanical stirring and heating, metallic aluminum is further recovered from the slag, and non-metallic impurities are separated at the same time, so as to reduce resource waste and environmental pollution, thereby significantly improving the resource utilization rate of metallic aluminum.

[0073] Furthermore, in one of the embodiments, when the slag is roasted, the heating temperature is controlled at 700°C-750°C, and the roasting time is controlled at 20min-40min to obtain metallic aluminum liquid, so as to avoid the heating temperature being too low, the metallic aluminum cannot be completely melted; or the temperature being too high, the metallic aluminum is easily oxidized.

[0074] Furthermore, in one of the embodiments, the molten aluminum is poured into a forming mold, and the aluminum ingot is obtained through the steps of pressure holding, cooling, mold opening, and demolding, thereby achieving further recovery of the aluminum metal and effectively avoiding the waste of metal resources.

[0075] In one of the embodiments, before the step of performing a slag removal operation on the primary aluminum liquid, the regenerated aluminum smelting method further includes: stirring the primary aluminum liquid.

[0076] It can be understood that before the primary aluminum liquid is subjected to slag removal operation, stirring is applied to the primary aluminum liquid to break the static balance of the primary aluminum liquid, so as to cause various impurities in the primary aluminum liquid to float up and promote the flow of the primary aluminum liquid, thereby ensuring the efficiency and effect of subsequent slag removal.

[0077] Furthermore, in one of the embodiments, stirring is applied to the primary aluminum liquid between each heating stage of the smelting operation, thereby promoting the fluidity of the primary aluminum liquid in the mother smelting furnace chamber, allowing the aluminum liquid and other metal elements to be fully mixed, making the temperature distribution of the primary aluminum liquid more uniform, and avoiding problems such as large local composition deviations or local temperature overheating.

[0078] S107: The primary aluminum liquid after the slag removal operation is transferred to multiple alloy melting furnaces respectively.

[0079] It can be understood that in this embodiment, the mother melting furnace is connected to each alloy melting furnace through the flow channel, and the efficient and convenient turnover of the aluminum liquid is achieved through the flow channel; different grades of aluminum liquid can be prepared at the same time through multiple alloy melting furnaces, thereby greatly improving the production efficiency of aluminum liquid.

[0080] In one of the embodiments, before the step of sampling the aluminum liquid in each of the alloy furnaces, the regenerated aluminum smelting method also includes: adding a refining agent to the aluminum liquid in the corresponding alloy furnace, wherein the amount of the refining agent accounts for 0.2%-0.4% of the weight of the aluminum liquid in the alloy furnace; and refining the aluminum liquid in the alloy furnace.

[0081] It can be understood that impurities and gases can be removed through refining, which can significantly improve the purity of the primary aluminum liquid, thereby effectively ensuring the quality of the primary aluminum liquid.

[0082] S109: Acquire multiple target grade element data corresponding to multiple target grades of aluminum alloy materials.

[0083] It can be understood that the target grade element data is obtained, that is, the content percentage of each metal element in the unit mass of the aluminum alloy die casting.

[0084] S111: Sampling and testing the aluminum liquid in each alloy melting furnace respectively to obtain testing element data.

[0085] It can be understood that since the primary molten aluminum is transferred to multiple alloy furnaces, the molten aluminum of multiple alloy furnaces can be simultaneously prepared, that is, by sampling and testing the molten aluminum of multiple alloy furnaces at the same time, multiple detection element data can be obtained.

[0086] In one embodiment, after the step of sampling the aluminum liquid in each alloy furnace and before the step of detection, the regenerated aluminum smelting method further includes: cooling the sampled aluminum liquid to form an aluminum block to be detected; and turning the aluminum block to be detected to form a plane to be detected.

[0087] It can be understood that, through cooling molding and turning operations, an aluminum block to be tested with a flat surface to be tested is prepared, thereby ensuring the accuracy and reliability of the test results. Specifically, in this embodiment, the sampled aluminum liquid will be poured into the forming mold, and the aluminum block to be tested will be obtained after cooling and demolding; wherein, the mold cavity of the forming mold is cylindrical or square, so that the clamping in the subsequent turning operation is more convenient and reliable, ensuring the flatness of the turning surface to be tested.

[0088] Furthermore, in one embodiment, the specific steps of sampling the aluminum liquid in each alloy melting furnace are: preheating the sampling spoon and the forming mold respectively; and filling the aluminum liquid in the alloy melting furnace into the mold cavity of the preheated forming mold through the preheated sampling spoon. In this way, oxidation or solidification of the aluminum liquid due to the large temperature difference during the sampling and filling process can be effectively avoided.

[0089] In one of the embodiments, the plane to be detected is subjected to component detection, and the component detection is performed by a direct reading spectrometer to obtain element content detection data.

[0090] It can be understood that the element content detection data obtained by using a direct reading spectrometer to perform component detection on the plane to be detected has good accuracy and reliability, and can significantly improve the detection efficiency in the actual production process; specifically, in this embodiment, the element content detection data is the percentage of each metal element in the aluminum liquid. By analyzing the above content percentages, the content distribution of each metal element in the aluminum liquid can be known.

[0091] In one of the embodiments, when sampling the aluminum liquid in each of the alloy melting furnaces, the temperature of the aluminum liquid in the corresponding alloy melting furnace is controlled between 690°C and 700°C.

[0092] It can be understood that when sampling molten aluminum, the temperature of the molten aluminum in the alloy furnace should not be too low to ensure that the molten aluminum has good fluidity, making it easier to pour the molten aluminum into the molding mold, avoiding the viscosity of the molten aluminum causing uneven sampling or inclusion of bubbles, thereby improving the accuracy of molten aluminum sampling.

[0093] Specifically, in this embodiment, when sampling the molten aluminum in the alloy furnace, the temperature of the molten aluminum is controlled at 720°C.

[0094] S113: Compare each detected element data with the corresponding target brand element data.

[0095] In this embodiment, by comparing the detected element data with the corresponding target brand element data, the difference between the detected element data and the target brand element data can be obtained.

[0096] S115: judging whether it is necessary to prepare the corresponding aluminum liquid in the alloy melting furnace according to the comparison result of each element.

[0097] In this embodiment, the element comparison result is the difference between the detected element data and the target grade element data. According to the difference, it can be known whether the content percentage of a certain metal element in the aluminum liquid is insufficient or excessive.

[0098] S117: If yes, the aluminum liquid in the corresponding alloy melting furnace is adjusted according to each element comparison result; if no, the aluminum liquid in the corresponding alloy melting furnace is transferred to the holding furnace to obtain the target aluminum liquid.

[0099] Furthermore, in the present embodiment, the specific steps for allocating the aluminum liquid of the alloy furnace according to each element comparison result are: first, establishing an aluminum liquid element control data table; secondly, obtaining the weight value of the aluminum liquid of the alloy furnace; thirdly, importing the weight value of the aluminum liquid of the alloy furnace and the element content detection data into the aluminum liquid element control data table to obtain an element ratio quantification table; finally, according to the element ratio quantification table, selecting materials to add corresponding elements or adding the pure aluminum material for neutralization.

[0100] It can be understood that the aluminum liquid element control data table includes the range value of the content percentage of each metal element in the target aluminum liquid; specifically, Figure 4 It is a range value control table of the percentage of the main metal elements in the target aluminum liquid of some grades. In this embodiment, the weight value and element content detection data of the aluminum liquid in the alloy melting furnace are imported into the aluminum liquid element control data table to obtain the element ratio quantitative table, that is, the addition amount of each metal element.

[0101] It should be noted that the above-mentioned percentage content of the main metal elements refers to the percentage content of the main metal elements other than the aluminum metal element in the target aluminum liquid.

[0102] Specifically, (the content percentage of the metal element in the aluminum liquid - the content percentage of the metal element in the target aluminum liquid) × the weight value of the aluminum liquid in the alloy melting furnace = the amount of metal element added.

[0103] When the amount of metal element added is negative, it is necessary to add the corresponding metal element materials to the aluminum liquid in the alloy melting furnace for mixing, so that the metal element that is lacking in the aluminum liquid in the alloy melting furnace can be added in a targeted manner to effectively improve the quality of the aluminum liquid in the alloy melting furnace;

[0104] When the amount of metal element added is positive, it is prepared according to the following two methods.

[0105] The first one is that when the addition amount of a few metal elements is positive, it is necessary to add raw aluminum materials to the aluminum liquid in the alloy furnace for blending. It can be understood that the purity of aluminum metal elements in raw aluminum materials is lower than that in pure aluminum materials. Therefore, by adding raw aluminum materials for blending, the aluminum liquid in the alloy furnace can be neutralized, and the content percentages of other metal elements in the aluminum liquid can be balanced, so that the content percentages of each metal element in the aluminum liquid can quickly reach the range of the content percentages of each metal element in the target aluminum liquid, so as to effectively improve the efficiency of blending. For example, when the addition amount of zinc metal elements in the aluminum liquid is positive, that is, the percentage of zinc metal elements is high, and the addition amounts of other metal elements are negative, especially the percentage of silicon metal elements is low, then it is necessary to reduce the percentage of zinc metal elements in the aluminum liquid, and increase the percentage of silicon metal elements in the aluminum liquid. For details, please refer to Figure 5 The raw aluminum materials in the 1#, 2# or 4# bins are added and formulated, wherein the raw aluminum materials in the 1#, 2# or 4# bins have the characteristics of a higher percentage of silicon metal elements and a higher percentage of zinc metal elements.

[0106] The second type is that when the addition amount of most metal elements is positive, pure aluminum materials need to be added to the aluminum liquid in the alloy furnace for blending. It can be understood that by adding pure aluminum materials for blending, the aluminum liquid in the alloy furnace can be neutralized to simultaneously reduce the content percentage of most metal elements in the aluminum liquid, so that the content percentage of most metal elements in the aluminum liquid can quickly reach the range of the content percentage of each metal element in the target aluminum liquid, so as to effectively improve the efficiency of blending, and at the same time make the content percentage of each metal element in the aluminum liquid of the alloy furnace better meet the technical requirements of the content percentage of each metal element in the target aluminum liquid. For details, please refer to Figure 5 The pure aluminum materials in the 3# or 5# bin are added and mixed.

[0107] like Figure 5 As shown, it should be noted that in the actual production and deployment process of aluminum liquid, the above five common raw aluminum materials and pure aluminum materials with different percentages of main metal elements are included but not limited to. After the sampling and testing steps, the above five common raw aluminum materials and pure aluminum materials are classified according to the different percentages of the main metal elements in each material, and warehoused for subsequent deployment, so as to be called at any time, thereby improving the smelting efficiency of aluminum liquid and shortening the production cycle of target aluminum liquid.

[0108] Furthermore, in one embodiment, after the step of selecting materials to add corresponding elements or adding the pure aluminum material for neutralization according to the element ratio quantitative table, the secondary aluminum smelting method further includes: obtaining a blended material; and stirring the blended material with a stirrer. In this way, the blended material has better uniformity when added to the aluminum liquid in the alloy melting furnace, thereby effectively ensuring the quality of the aluminum liquid.

[0109] Furthermore, in one embodiment, after each step of blending the aluminum liquid in the alloy melting furnace and before each sampling of the aluminum liquid in the alloy melting furnace, the regeneration aluminum smelting method further includes: adding a refining agent to the aluminum liquid in the alloy melting furnace; and refining the aluminum liquid in the alloy melting furnace. In this way, impurities in the blended materials can be removed to reduce the slag content of the aluminum liquid, thereby improving the accuracy and representativeness of the sampling.

[0110] S119: Repeat steps S111 to S117 until the target aluminum liquid is obtained.

[0111] See also Figure 3 The present application also provides a recycled aluminum smelting production line for new energy vehicle parts, which adopts the recycled aluminum smelting method for new energy vehicle parts described in any of the above embodiments to smelt the target aluminum liquid. The recycled aluminum smelting production line for new energy vehicle parts includes a mother melting furnace 100 and multiple alloy melting furnaces 200; the furnace chamber of the mother melting furnace 100 is connected to the furnace chamber of each of the alloy melting furnaces 200 through a primary flow channel 300, and the horizontal height of the mother melting furnace 100 is higher than the horizontal height of each of the alloy melting furnaces 200.

[0112] In this embodiment, a recycled aluminum smelting method for new energy vehicle parts is adopted, and multiple alloy furnaces 200 are configured through a mother melting furnace 100, and the furnace chamber of the mother melting furnace 100 is connected with the furnace chamber of the alloy melting furnace 200 through a primary flow channel 300, so that the primary aluminum liquid in the furnace chamber of the mother melting furnace 100 can flow to the furnace chambers of multiple alloy furnaces 200 respectively, so as to facilitate the simultaneous preparation of aluminum liquids of different grades through multiple alloy furnaces 200, thereby greatly improving the production efficiency of the target aluminum liquid.

[0113] Furthermore, since the horizontal height of the mother melting furnace 100 is higher than the horizontal height of each alloy melting furnace 200, the self-flow of the primary aluminum liquid is achieved by its own weight, thereby effectively reducing the production energy consumption.

[0114] Furthermore, after obtaining the target aluminum liquid, the recycled aluminum smelting method for new energy vehicle parts also includes: transferring the target aluminum liquid to the insulation furnace 400 for insulation storage, thereby avoiding the natural solidification of the aluminum liquid, so as to subsequently use the target aluminum liquid for die-casting production of ingots or aluminum alloy die-castings.

[0115] like Figure 3 As shown, in one embodiment, the recycled aluminum smelting production line for new energy vehicle parts further includes a plurality of insulation furnaces 400, each of the alloy melting furnaces 200 is connected to the corresponding alloy melting furnace 200 through a secondary flow trough 500, and the horizontal height of each alloy melting furnace 200 is higher than the horizontal height of the corresponding insulation furnace 400, and the insulation furnace 400 is used to store aluminum liquid in a heat preservation manner. In this way, gravity is used to realize the natural flow of aluminum liquid without the need for additional power equipment, that is, the dependence of aluminum liquid transportation on external equipment is reduced, and production energy consumption is effectively reduced; more importantly, the exposure time of aluminum liquid in the air is reduced, and the temperature loss is reduced.

[0116] like Figure 3 As shown, in one embodiment, the recycled aluminum smelting production line for new energy vehicle parts also includes a continuous degassing device 700 and an ingot production line 800; the liquid inlet end of the continuous degassing device 700 is respectively connected to the liquid outlet ends of the multiple alloy furnaces 200, and the liquid outlet end of the continuous degassing device 700 is connected to the liquid inlet end of the ingot production line 800. The continuous degassing device 700 is used to degas the aluminum liquid, and the ingot production line 800 is used to form aluminum ingots.

[0117] It can be understood that in the present embodiment, the number of the alloy furnaces 200 is two, and a turnover trough 600 is provided between the two alloy furnaces 200, that is, the aluminum liquid between the two alloy furnaces 200 is circulated and transported through the turnover trough 600, and the liquid outlet end of the continuous degassing device 700 is connected to the middle part of the turnover trough 600, so that the aluminum liquid can be transported to the two alloy furnaces 200 respectively through the turnover trough 600, so as to effectively optimize the layout design of the aluminum liquid transportation, thereby reducing the dependence of the aluminum liquid transportation on external equipment, and can realize the rapid conversion of aluminum liquid into aluminum ingots through the continuous degassing device 700 and the ingot casting production line 800, and better avoid the energy waste caused by the long-term insulation and storage of excess aluminum liquid in the insulation furnace 400.

[0118] It should be noted that the continuous degassing device 700 and the ingot production line 800 are both existing technologies and will not be introduced in detail here.

[0119] Compared with the prior art, the present invention has at least the following advantages:

[0120] 1. Before the smelting operation, the recycled aluminum smelting method disclosed in the present invention weighs the recyclable aluminum alloy material and the pure aluminum material according to the initial ratio, that is, the smelting ratio of the recyclable aluminum alloy material and the pure aluminum material is accurately controlled in the early stage of smelting, in order to provide guarantee for the subsequent production quality of aluminum liquid, and effectively replace the method of feeding relying on manual experience.

[0121] 2. The regenerated aluminum smelting method disclosed in the present invention transfers the primary aluminum liquid after the slag removal operation into an alloy furnace, and then samples, detects and compares the aluminum liquids in multiple alloy furnaces respectively, so as to determine whether the aluminum liquid in the alloy furnace needs to be adjusted until the target aluminum liquid is obtained. That is, different grades of aluminum liquid can be adjusted simultaneously through multiple alloy furnaces, and the target aluminum liquid is pre-stored in a holding furnace, thereby greatly improving the production efficiency of aluminum liquid and the accuracy of the aluminum liquid ratio, thereby effectively improving the quality of aluminum liquid, thereby better ensuring the quality of subsequent die-cast aluminum alloy die-castings.

[0122] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the patent of the present disclosure shall be subject to the attached claims.

Claims

1. A method for smelting recycled aluminum for new energy vehicle parts, characterized in that: include: S101, obtaining recyclable aluminum alloy materials; S103, weighing the recyclable aluminum alloy material and the pure aluminum material according to an initially set ratio, and putting them into a mother furnace for smelting operation to obtain primary aluminum liquid; S105, performing a slag removal operation on the primary aluminum liquid; S107, transferring the primary aluminum liquid after the slag removal operation to multiple alloy melting furnaces respectively; S109, obtaining multiple target grade element data corresponding to multiple target grade aluminum alloy materials one by one; S111, sampling and testing the aluminum liquid in each alloy melting furnace to obtain test element data; S113, comparing each detected element data with the corresponding target grade element data; S115, judging whether it is necessary to prepare the corresponding aluminum liquid in the alloy melting furnace according to the comparison result of each element; S117, if yes, then the aluminum liquid in the corresponding alloy melting furnace is adjusted according to each element comparison result; if no, then the aluminum liquid in the corresponding alloy melting furnace is transferred to the holding furnace to obtain the target aluminum liquid; S119, repeat steps S111 to S117 until the target aluminum liquid is obtained.

2. The method for smelting recycled aluminum for new energy vehicle parts according to claim 1, characterized in that: The specific steps of the smelting operation are: Controlling the mother furnace to preheat the recyclable aluminum alloy material and the pure aluminum material; Adjust the smelting temperature of the mother furnace to a low fire of 0℃-250℃ for 60 minutes; Adjust the smelting temperature of the mother furnace to medium fire 250℃-450℃, and the duration is 60min; Adjust the smelting temperature of the mother furnace to high fire 450℃-750℃ for 60 minutes.

3. The method for smelting recycled aluminum for new energy vehicle parts according to claim 2, characterized in that: Before the step of performing a slag removal operation on the primary aluminum liquid, the secondary aluminum smelting method further comprises: The primary aluminum liquid is stirred.

4. The method for smelting recycled aluminum for new energy vehicle parts according to claim 2, characterized in that: Before the step of sampling the aluminum liquid in each alloy melting furnace, the secondary aluminum smelting method further comprises: Adding a refining agent to the corresponding aluminum liquid in the alloy melting furnace, wherein the amount of the refining agent accounts for 0.2%-0.4% of the weight of the aluminum liquid in the alloy melting furnace; The aluminum liquid in the alloy melting furnace is refined.

5. The method for smelting recycled aluminum for new energy vehicle parts according to claim 1, characterized in that: After the step of sampling the aluminum liquid in each alloy melting furnace and before the step of detecting, the secondary aluminum smelting method further comprises: The sampled aluminum liquid is cooled and formed into an aluminum block to be tested; The aluminum block to be inspected is subjected to a turning operation so that the aluminum block to be inspected forms a plane to be inspected.

6. The method for smelting recycled aluminum for new energy vehicle parts according to claim 5, characterized in that: The element composition of the plane to be detected is detected, and the component detection is performed by a direct reading spectrometer to obtain element content detection data.

7. The method for smelting recycled aluminum for new energy vehicle parts according to claim 6, characterized in that: The specific steps of preparing the aluminum liquid in the alloy melting furnace according to each element comparison result are: Establish aluminum liquid element control data table; Obtaining the weight value of the aluminum liquid in the alloy melting furnace; Importing the weight value of the aluminum liquid in the alloy melting furnace and the element content detection data into the aluminum liquid element control data table to obtain an element ratio quantitative table; According to the element ratio quantitative table, select the material to add the corresponding element or add the pure aluminum material for neutralization.

8. The method for smelting recycled aluminum for new energy vehicle parts according to claim 5, characterized in that: When sampling the aluminum liquid in each of the alloy melting furnaces, the temperature of the aluminum liquid in the corresponding alloy melting furnace is controlled between 690° C. and 700° C.

9. A recycled aluminum smelting production line for new energy vehicle parts, characterized in that: The target aluminum liquid is obtained by smelting the recycled aluminum smelting method for new energy vehicle parts according to any one of claims 1 to 8, and the recycled aluminum smelting production line for new energy vehicle parts includes a mother melting furnace and multiple alloy melting furnaces; the furnace chamber of the mother melting furnace is connected to the furnace chamber of each of the alloy melting furnaces through a primary flow channel, and the horizontal height of the mother melting furnace is higher than the horizontal height of each of the alloy melting furnaces.

10. The recycled aluminum smelting production line for new energy vehicle parts according to claim 9, characterized in that: The recycled aluminum smelting production line for new energy vehicle parts also includes multiple insulation furnaces. Each of the alloy melting furnaces is connected to the corresponding alloy melting furnace through a secondary flow channel. The horizontal height of each alloy melting furnace is higher than the horizontal height of the corresponding insulation furnace. The insulation furnace is used to insulate and store aluminum liquid.

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