Multi-effect flux integrating multiple functions of impurity removal and iron removal, preparation method of multi-effect flux and application of multi-effect flux in production of high-performance waste aluminum regenerated rare earth magnesium alloy material

Abstract

The invention discloses a multi-effect flux integrating multiple functions of impurity removal and iron removal, a preparation method of the multi-effect flux and application of the multi-effect flux in production of a high-performance waste aluminum regenerated rare earth magnesium alloy material. The multi-effect flux is prepared from various raw materials such as composite villiaumite, boron salt and chlorine salt in specific parts by weight, all the components have a synergistic effect, efficient purification, iron removal and hydrogen removal of the waste aluminum material are achieved, and preparation of the multi-effect flux is completed through the procedures of strict mixing and temperature-controlled stirring. A specific raw material ratio is adopted for preparation of the high-performance waste aluminum regenerated rare earth magnesium alloy material, industrial waste aluminum ingots, rare earth recycled materials and the like are covered, and parameters of all links are accurately controlled through fine cleaning and impurity removal, multi-stage smelting and refining processes. According to the method, the waste aluminum recycling problem is effectively solved, compared with the prior art, the waste aluminum regeneration quality is greatly improved, the cost is reduced, and the obtained alloy is excellent in mechanical property, high in waste aluminum utilization rate, low in hydrogen content and extremely high in industrial application value.

Description

Technical Field

[0001] The invention relates to the technical field of metal material recovery and reuse, and in particular to a multi-effect flux integrating impurity and iron removal, a preparation method thereof, and application thereof in producing high-performance recycled rare earth magnesium alloy materials from scrap aluminum. Background Art

[0002] With the rapid development of modern industry, aluminum and its alloys are increasingly widely used in aerospace, automobile manufacturing, construction materials, electronic appliances and many other fields due to their excellent properties such as light weight, corrosion resistance and good thermal conductivity, becoming an indispensable and important material in modern society. However, this widespread application trend is also accompanied by a problem that cannot be ignored: the amount of scrap aluminum materials generated has increased dramatically. If these scrap aluminum materials cannot be effectively processed, they will not only occupy a large amount of land resources, but also may cause long-term pollution to the environment. Therefore, the recycling and reuse of scrap aluminum has not only become an effective way to alleviate the problem of natural resource shortage, but also an important measure to reduce energy consumption, reduce environmental pollution and promote green and sustainable development.

[0003] However, despite the great significance of recycling and reusing scrap aluminum, the traditional scrap aluminum recycling process faces many challenges and defects in actual operation. On the one hand, scrap aluminum materials are often complex in composition and high in impurity content. The presence of impurities such as iron, hydrogen and various non-metallic inclusions is like a "stumbling block" hidden on the road to improving the quality of recycled aluminum. These impurities will seriously affect the physical and mechanical properties of recycled aluminum, resulting in low tensile strength and insufficient hardness of products made of recycled aluminum, making it difficult to meet the strict requirements of high-performance and high-precision products for material properties. Especially in high-end manufacturing fields such as marine engines, aerospace, and high-speed trains, the stringent requirements for material properties make it difficult for recycled aluminum under traditional recycling processes to meet the requirements.

[0004] On the other hand, the existing impurity removal technologies are relatively simple and can only remove a certain type or a certain kind of impurity, making it difficult to achieve simultaneous and efficient removal of multiple impurities. This not only limits the improvement of impurity removal efficiency, but may also introduce new impurities due to improper operation during the impurity removal process, or cause unnecessary damage to the aluminum matrix itself, further affecting the quality of recycled aluminum. In addition, the high cost of impurity removal is also an important factor restricting the development of traditional recycling processes.

[0005] At the same time, there are also problems in the preparation process of recycled aluminum alloys from scrap aluminum that cannot be ignored. Due to the lack of fine control of process parameters such as raw material ratio, smelting temperature, and refining time, the composition of the recycled alloy fluctuates greatly and the organizational structure is uneven, which in turn affects the mechanical properties and processing properties of the alloy. This not only makes the quality of the recycled alloy uneven and the scrap rate high, but also limits its large-scale application in the field of high-end manufacturing. Especially in occasions where material performance requirements are extremely stringent, such as large-scale aluminum alloy castings for marine engines, precision instrument manufacturing, high-end electronic equipment, etc., recycled alloys under traditional recycling processes are often difficult to meet the needs.

[0006] In summary, the many defects of traditional scrap aluminum recycling processes in terms of impurity removal and alloy preparation have seriously restricted the efficient recycling and reuse of scrap aluminum resources. Therefore, exploring more advanced and efficient scrap aluminum recycling and reuse technologies has become an important issue that needs to be solved urgently.

[0007] The disclosure of the above background technology content is only used to assist in understanding the inventive concept and technical solution of the present invention. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above content has been disclosed on the filing date of this patent application, the above background technology should not be used to evaluate the novelty and creativity of the present application. Summary of the invention

[0008] The present invention aims to overcome the above-mentioned difficulties and proposes a multi-effect flux that has the functions of removing impurities and iron, a preparation method and its application in the production of high-performance scrap aluminum recycled rare earth magnesium alloy materials, so as to achieve deep purification and high-value conversion of scrap aluminum and promote the upgrading of the aluminum recycling industry.

[0009] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0010] A multi-effect flux with the functions of removing impurities and iron, comprising the following raw materials in parts by weight: 90-230 parts of composite fluoride salt, 140-300 parts of boron salt, 100-250 parts of chloride salt, 20-56 parts of sodium salt, 35-75 parts of phosphorus salt, 5-12 parts of sulfur salt, 2-6 parts of molybdenum salt and 5-14 parts of manganese salt.

[0011] Preferably, the composite fluoride salt includes at least two of sodium fluoride, potassium fluoride, calcium fluoride, magnesium fluoride and lithium fluoride.

[0012] Preferably, the boron salt comprises at least one of borax, boric acid or sodium borate.

[0013] Preferably, the chloride salt includes at least one of calcium chloride, potassium chloride, magnesium chloride, lithium chloride and sodium chloride.

[0014] Preferably, the sodium salt includes at least one of sodium hydroxide and sodium carbonate.

[0015] Preferably, the phosphate salt includes at least one of hydroxyapatite and potassium dihydrogen phosphate.

[0016] Preferably, the sulfur salt includes at least one of sodium sulfate, sodium sulfite, sodium sulfide and sodium thiosulfate.

[0017] Preferably, the molybdenum salt is potassium molybdate, and the manganese salt includes at least one of manganese carbonate, manganese sulfate, manganese nitrate and manganese chloride.

[0018] The present invention also provides a method for preparing a multi-effect flux having the functions of removing impurities and iron, comprising the following steps:

[0019] Step 1: Weigh the components of composite fluoride salt, boron salt, chloride salt and sodium salt in proportion and mix them, and sieve the mixed raw materials to obtain a primary mixture;

[0020] Step 2: weigh components such as manganese salt and molybdenum salt according to proportion and mix them, and sieve the mixed raw materials to obtain a secondary mixture;

[0021] Step 3: Weigh the components of phosphorus salt and sulfur salt according to proportion and mix them. The mixed raw materials are all sieved to obtain a tertiary mixture;

[0022] Step 4: Add water to the first mixture, the second mixture and the third mixture, the total weight of the water added is 24-30% of the total weight of the mixed materials, stir and heat to increase the temperature, continue stirring for 2-4 hours when the temperature reaches 82-94°C, then cool to 50-70°C, continue stirring for 1.6-2.5 hours, and obtain a multi-effect flux that has the functions of removing impurities and iron.

[0023] The present invention also provides a multi-effect flux with the functions of removing impurities and iron in one, and its application in producing high-performance waste aluminum recycled rare earth magnesium alloy material is characterized in that the preparation method of the high-performance waste aluminum recycled rare earth magnesium alloy material comprises the following steps:

[0024] Step 1, take 70-79% of industrial waste aluminum ingots, 5.6-10.1% of rare earth recovery materials, 4.8-7.2% of aluminum-based inclusions, 4.3-6.5% of aluminum waste, 1.6-3.8% of scrap steel, 3.5-8.7% of magnesium blocks, 1.2-2.5% of magnesium bars, 0.05-0.12% of silicon wafers, 0.02-0.04% of aluminum-based alloys, 7.5-9.6% of multi-effect flux, and the remainder of zinc flakes, weigh them according to the above weight percentages, and mix them evenly to obtain a mixture; the mixture is cleaned and impurity-removed pretreatment, and the cleaning and impurity-removing pretreatment includes crushing, screening, and spheroidization, the mixture is crushed into small particles, and the mixed particles less than 10mm are selected by screening; in the cleaning and impurity-removing pretreatment, the mixed material is spheroidized by mechanical drum rotation, and spraying flux is used to control the spheroidization temperature of the mixed material to be ≤370°C, and the particle size of the mixed material after spheroidization is controlled to be 7-9mm;

[0025] Step 2: pour the pre-treated mixed material into a melting furnace and slowly heat it up at a rate of 82-95°C / h until it reaches 780-920°C, melting the mixed material into a liquid;

[0026] Step 3, after the mixed material is melted in the smelting furnace, 0.5-0.8wt% of aluminum powder is added thereto and stirred evenly; the molten liquid is stirred for 3-5 minutes;

[0027] Step 4: The mixed material in the smelting furnace is placed at 940-1050°C for 6-9 minutes for refining. During the refining, 0.12-0.35% aluminum powder is added to the surface of the molten liquid and stirred evenly.

[0028] Step 5, adding 4.1-6.5wt% of manganese powder, 1.0-1.9wt% of copper powder, 3.2-4.6wt% of titanium powder, 4.7-12.1wt% of calcium powder, and 1.5-2.8wt% of iron powder to the mixture in the smelting furnace, and stirring and mixing evenly;

[0029] Step 6, melting the mixed material in a melting furnace, and during melting, adding a composite covering agent to the melting furnace according to 4.8-7.6wt% of the mixed material weight in the melting furnace;

[0030] Step 7, after the molten liquid in the smelting furnace is smelted, the molten liquid is introduced into the refining furnace, and aluminum powder is used to cover 1-1.2 mm, and the molten liquid in the refining furnace is refined for 15-23 minutes;

[0031] Step eight, pour the refined molten liquid into a mold, and wait for cooling to obtain a high-performance waste aluminum recycled rare earth magnesium alloy material.

[0032] Compared with the prior art, the present invention has the following technical advantages:

[0033] (1) Efficient impurity removal: The multi-effect flux used in the present invention has excellent impurity removal ability through the synergistic effect of multiple carefully proportioned components. It can simultaneously and efficiently remove multiple impurities such as iron, hydrogen and non-metallic inclusions in the aluminum liquid. Compared with the traditional process that relies on a single impurity removal method, this innovative strategy has achieved a significant improvement in impurity removal efficiency, and the impurity removal rate has increased by more than 30% compared with the traditional method. This breakthrough not only greatly improves the purity of aluminum liquid, but also brings positive changes to the production of recycled alloys, reducing the impurity content of the final product to a lower level, providing a more reliable material foundation for high-end application fields.

[0034] (2) Low hydrogen content: During the production of recycled alloys, the process control procedures strictly followed by the present invention ensure that the hydrogen content of the recycled alloy is extremely low, less than 0.10mL / 100gA1. This strict quality control measure effectively avoids defects such as pores and cracks caused by excessive hydrogen content, thereby significantly improving the overall quality stability of the product. This is crucial to improving the service life and reliability of the final product, and also brings a more reliable product experience to users.

[0035] (3) Excellent performance: The present invention cleverly incorporates rare earth and other multi-material raw materials into the alloy formula. The synergistic effect of these raw materials gives the recycled alloy excellent mechanical properties. Specifically, the tensile strength of the alloy material is above 250.8MPa and the hardness is above 81.5HBW. This data far exceeds many similar recycled products, indicating the significant advantages of the present invention in material strength and durability. Such excellent performance has undoubtedly opened up a broader world for the application of recycled alloys, especially in high-end markets with extremely stringent requirements on material performance (such as large-scale aluminum alloy castings for marine engines, etc.), showing huge application potential.

[0036] (4) Cost advantage: The present invention attaches great importance to the efficient use of resources. By recycling a high proportion of scrap aluminum (≥50%) and combining it with a simple and efficient production process, it has successfully achieved a major breakthrough in cost control. Compared with the traditional method that relies on the preparation of primary aluminum, the cost of the present invention is reduced by at least 40%. This significant economic benefit not only enhances the market competitiveness of enterprises, but also provides strong economic support for promoting the recycling of aluminum resources.

[0037] (5) Green and environmentally friendly: This invention actively responds to the global call for environmental protection and is committed to reducing the mining of primary aluminum and the discharge of waste slag. Through the "rebirth" of waste aluminum, it not only achieves the effective utilization of resources, but also effectively reduces the pressure on the natural environment. This innovative practice not only conforms to the development concept of circular economy, but also has achieved outstanding achievements in environmental benefits, setting a new benchmark for promoting the sustainable development of the aluminum industry.

[0038] In summary, the technical advantages of the present invention are not only reflected in technological innovation and performance improvement, but also in its dual contribution to environmental protection and economic benefits, showing a bright prospect for the future recycling of aluminum materials. DETAILED DESCRIPTION

[0039] The present invention will be further described in detail below in conjunction with specific embodiments. It should be emphasized that the following description is only exemplary and is not intended to limit the scope of the present invention and its application.

[0040] In an embodiment of the present invention, the multi-effect flux having the functions of removing impurities and iron in one comprises the following raw materials in parts by weight: 90-230 parts of composite fluoride salt, 140-300 parts of boron salt, 100-250 parts of chloride salt, 20-56 parts of sodium salt, 35-75 parts of phosphate salt, 5-12 parts of sulfur salt, 2-6 parts of molybdenum salt and 5-14 parts of manganese salt.

[0041] The composite fluoride salt is at least two of sodium fluoride, potassium fluoride, calcium fluoride, magnesium fluoride and lithium fluoride;

[0042] The boron salt is at least one of borax, boric acid or sodium borate;

[0043] The chloride salt is at least one of calcium chloride, potassium chloride, magnesium chloride, lithium chloride and sodium chloride;

[0044] The sodium salt is at least one of sodium hydroxide and sodium carbonate;

[0045] The phosphate salt includes at least one of hydroxyapatite and potassium dihydrogen phosphate;

[0046] The sulfur salt includes at least one of sodium sulfate, sodium sulfite, sodium sulfide, and sodium thiosulfate;

[0047] The molybdenum salt is potassium molybdate;

[0048] The manganese salt is at least one of manganese carbonate, manganese sulfate, manganese nitrate and manganese chloride.

[0049] The preparation method of the multi-effect flux having the functions of removing impurities and iron in one comprises the following steps:

[0050] Step 1: Weigh the components of composite fluoride salt, boron salt, chloride salt and sodium salt in proportion and mix them, and sieve the mixed raw materials to obtain a primary mixture;

[0051] Step 2: weigh components such as manganese salt and molybdenum salt according to proportion and mix them, and sieve the mixed raw materials to obtain a secondary mixture;

[0052] Step 3: Weigh the components of phosphorus salt and sulfur salt according to proportion and mix them. The mixed raw materials are all sieved to obtain a tertiary mixture;

[0053] Step 4: Add water to the first mixture, the second mixture and the third mixture, the total weight of the water added is 24-30% of the total weight of the mixed materials, stir and heat to increase the temperature, continue stirring for 2-4 hours when the temperature reaches 82-94°C, then cool to 50-70°C, continue stirring for 1.6-2.5 hours, and obtain a multi-effect flux that has the functions of removing impurities and iron.

[0054] A method for preparing a high-performance waste aluminum recycled rare earth magnesium alloy material comprises the following steps:

[0055] Step 1, take 70-79% of industrial waste aluminum ingots, 5.6-10.1% of rare earth recovery materials, 4.8-7.2% of aluminum-based inclusions, 4.3-6.5% of aluminum waste, 1.6-3.8% of scrap steel, 3.5-8.7% of magnesium blocks, 1.2-2.5% of magnesium bars, 0.05-0.12% of silicon wafers, 0.02-0.04% of aluminum-based alloys, 7.5-9.6% of multi-effect flux, and the remainder of zinc flakes, weigh them according to the above weight percentages, and mix them evenly to obtain a mixture; the mixture is cleaned and impurity-removed pretreatment, and the cleaning and impurity-removing pretreatment includes crushing, screening, and spheroidization, the mixture is crushed into small particles, and the mixed particles less than 10mm are selected by screening; in the cleaning and impurity-removing pretreatment, the mixed material is spheroidized by mechanical drum rotation, and spraying flux is used to control the spheroidization temperature of the mixed material to be ≤370°C, and the particle size of the mixed material after spheroidization is controlled to be 7-9mm;

[0056] Step 2: pour the pre-treated mixed material into a melting furnace and slowly heat it up at a rate of 82-95°C / h until it reaches 780-920°C, melting the mixed material into a liquid;

[0057] Step 3, after the mixed material is melted in the smelting furnace, 0.5-0.8wt% of aluminum powder is added thereto and stirred evenly; the molten liquid is stirred for 3-5 minutes;

[0058] Step 4: The mixed material in the smelting furnace is placed at 940-1050°C for 6-9 minutes for refining. During the refining, 0.12-0.35% aluminum powder is added to the surface of the molten liquid and stirred evenly.

[0059] Step 5, adding 4.1-6.5wt% of manganese powder, 1.0-1.9wt% of copper powder, 3.2-4.6wt% of titanium powder, 4.7-12.1wt% of calcium powder, and 1.5-2.8wt% of iron powder to the mixture in the smelting furnace, and stirring and mixing evenly;

[0060] Step 6, melting the mixed material in a melting furnace, and during melting, adding a composite covering agent to the melting furnace according to 4.8-7.6wt% of the mixed material weight in the melting furnace;

[0061] Step 7, after the molten liquid in the smelting furnace is smelted, the molten liquid is introduced into the refining furnace, and aluminum powder is used to cover 1-1.2 mm, and the molten liquid in the refining furnace is refined for 15-23 minutes;

[0062] Step eight, pour the refined molten liquid into a mold, and wait for cooling to obtain a high-performance waste aluminum recycled rare earth magnesium alloy material.

[0063] Technical principle of the present invention:

[0064] In the current field of materials science, the recycling of waste aluminum and the preparation of high-performance alloy materials have attracted much attention. The multi-effect flux and high-performance waste aluminum recycled rare earth magnesium alloy material involved in the present invention show excellent performance advantages through exquisite raw material matching and rigorous preparation process.

[0065] (I) Technical principle of multi-effect flux

[0066] 1. Role of raw materials

[0067] Composite fluoride salt: At least two of sodium fluoride, potassium fluoride, calcium fluoride, magnesium fluoride and lithium fluoride are selected to form composite fluoride salt. Its unique chemical properties enable it to cover and adsorb inclusions during the aluminum liquid treatment process, just like a fine filter, accurately capturing tiny impurity particles in the aluminum liquid, playing a key role in purification, inclusion deoxidation, purification and refining, laying the foundation for the subsequent acquisition of high-purity aluminum liquid.

[0068] Boron salt: Borax, boric acid or sodium borate are used as the boron salt component. Boron has a strong affinity for iron. In the flux system, boron salt can actively combine with iron impurities to form relatively stable compounds, thereby achieving efficient iron removal, effectively reducing the content of iron impurities in aluminum liquid, and improving the quality of aluminum liquid.

[0069] Chloride salt: The chloride salt system is composed of at least one of calcium chloride, potassium chloride, magnesium chloride, lithium chloride and sodium chloride. Chloride salt, with its active chemical properties, can produce a floating effect in a high-temperature molten environment, causing hydrogen in the aluminum liquid to escape in gaseous form, achieving the purpose of dehydrogenation, reducing the dissolution of hydrogen in the aluminum liquid, and avoiding the subsequent product defects caused by hydrogen, such as pores, cracks and other problems.

[0070] Sodium salt: The addition of at least one sodium salt of sodium hydroxide or sodium carbonate can, on the one hand, adjust the pH of the flux system, create a suitable chemical environment, and promote other raw materials to play a better role; on the other hand, sodium salt can also participate in some chemical reactions at high temperatures, assist in removing some acidic impurities, and further purify the aluminum liquid.

[0071] Phosphate: Contains at least one of hydroxyapatite and potassium dihydrogen phosphate. Phosphorus can form phosphate precipitation with some metal ions in the flux system, which helps to capture and fix specific impurities in the aluminum liquid, such as some heavy metal ions, and enhance the impurity removal ability of the flux.

[0072] Sulfur salt: The presence of at least one of sodium sulfate, sodium sulfite, sodium sulfide, and sodium thiosulfate. The sulfur element can undergo a sulfidation reaction with some metal impurities to form sulfide precipitates, thereby separating the impurities from the aluminum liquid and improving the purity of the aluminum liquid.

[0073] Molybdenum salt: Potassium molybdate is used as the molybdenum salt. The molybdenum element can play a certain catalytic role in the flux system, accelerate some chemical reactions, and improve the efficiency of impurity removal. At the same time, it may also form a trace amount of alloy phase with other metal elements, improve the microstructure of aluminum liquid, and enhance the performance of alloy.

[0074] Manganese salt: at least one manganese salt selected from manganese carbonate, manganese sulfate, manganese nitrate and manganese chloride is added. The manganese element can not only assist deoxidation in the flux system, but also be integrated into the alloy matrix in the subsequent alloying process to play a role in solid solution strengthening, thereby improving the strength and toughness of the alloy.

[0075] 2. Synergistic effect: These raw materials do not work in isolation, but work together. The first step of purification is to adsorb inclusions with composite fluoride salts, followed by targeted iron removal with boron salts, simultaneous floating and hydrogen removal with chloride salts, sodium salts to adjust the environment and assist the reaction, phosphate salts and sulfur salts to precipitate and capture impurities, molybdenum salts to accelerate catalysis, and manganese salts to take into account both deoxidation and subsequent strengthening. The various components work closely together to form an all-round, multi-level impurity removal network, which can simultaneously remove multiple impurities such as iron, hydrogen, and non-metallic inclusions in aluminum liquid. Compared with the traditional single impurity removal method, the impurity removal rate is increased by more than 30%, which significantly improves the purity of aluminum liquid and greatly reduces the impurity content of recycled alloys.

[0076] (II) Technical principle of high-performance rare earth magnesium alloy materials recycled from scrap aluminum

[0077] 1. Role of raw materials

[0078] Industrial waste aluminum ingots and aluminum waste: As the main raw materials, they provide a large source of aluminum elements and are the basis for building the alloy matrix. They achieve a high proportion of utilization of waste aluminum resources (≥50%), which not only reduces costs but also conforms to the concept of circular economy.

[0079] Rare earth recycled materials: Rare earth elements have a unique electronic layer structure, which can refine the grains in the alloy and make the microstructure of the alloy more uniform and dense. At the same time, rare earth elements can also form a variety of intermetallic compounds with other metal elements. These compounds are dispersed in the alloy matrix, playing a role of dispersion strengthening, greatly improving the mechanical properties of the alloy, such as tensile strength and hardness.

[0080] Aluminum-based inclusions and aluminum-based alloys: Although they contain certain impurities, the useful aluminum elements in them can be recycled after the preliminary multi-effect flux treatment and subsequent processes. At the same time, a small amount of other alloying elements can also participate in the alloying process, enriching the alloy composition and optimizing the alloy properties.

[0081] Scrap steel: The addition of an appropriate amount of scrap steel can adjust the carbon content of the alloy. In the subsequent smelting process, the carbon element interacts with other elements to form carbides, which further strengthen the alloy matrix and improve the alloy's wear resistance and other properties.

[0082] Magnesium block, magnesium bar: Magnesium is an important alloying element in aluminum alloys. It can lower the melting point of the alloy, improve the fluidity of the alloy, and facilitate the smelting and casting process. At the same time, the Mg-Al alloy phase formed by magnesium and aluminum has high strength and good corrosion resistance, which improves the overall performance of the alloy.

[0083] Silicon wafer: Silicon can play a role in solid solution strengthening and aging strengthening in aluminum alloys. The silicon phase formed with aluminum can refine the grains, increase the strength and hardness of the alloy, and silicon can also improve the casting properties of the alloy and reduce the thermal cracking tendency of the alloy.

[0084] Zinc sheet: After the addition of zinc element, the Zn-Al alloy phase formed in the alloy has a certain strengthening effect and can improve the corrosion resistance of the alloy, especially in some specific environments, enhancing the service life of the alloy.

[0085] Multi-effect flux: In the early pretreatment stage, the multi-effect flux plays a powerful impurity removal function, removing various impurities such as iron, hydrogen, non-metallic inclusions, etc. in the raw materials, providing a high-purity raw material basis for the subsequent smelting and preparation of high-performance alloys, and ensuring the quality of the alloy.

[0086] 2. Synergy: All raw materials cooperate with each other, industrial waste aluminum ingots and waste materials provide aluminum sources, rare earth recycled materials refine grains and dispersion strengthen, scrap steel, magnesium, silicon, zinc and other elements are multi-alloyed to optimize mechanical, casting, corrosion resistance and other properties, and multi-effect flux ensures the purity of raw materials, jointly creating an alloy with excellent performance. The alloy has excellent mechanical properties, with an average tensile strength of over 245MPa and a hardness of over 80HBW, far exceeding similar recycled products, broadening the boundaries of high-end applications.

[0087] (III) The necessity and importance of controlling the amount of raw materials and optimizing process parameters in the preparation process

[0088] 1. Multi-effect flux preparation process

[0089] Raw material dosage control: 90-230 parts of composite fluoride salt, 140-300 parts of boron salt, 100-250 parts of chloride salt, 20-56 parts of sodium salt, 35-75 parts of phosphate salt, 5-12 parts of sulfur salt, 2-6 parts of molybdenum salt, 5-14 parts of manganese salt. Such precise dosage ratio is obtained through a large number of experimental optimizations. Excessive dosage may lead to an increase in flux costs and may also introduce new impurities; too little dosage will not give full play to the impurity removal function of each raw material, and the expected impurity removal effect cannot be achieved, which will affect the purity of aluminum liquid.

[0090] Optimization of process parameters: All mixed raw materials are sieved to ensure uniform particle size, which is conducive to subsequent mixing reactions. Water is added to the primary mixture, secondary mixture and tertiary mixture. The total weight of water added is 24-30% of the total weight of the mixed materials. Water is used as a reaction medium. A small amount of water cannot ensure that the raw materials are fully dissolved and reacted. A large amount of water will dilute the flux concentration and reduce the impurity removal efficiency. Stir and heat to increase the temperature. Continue stirring for 2-4 hours at a temperature of 82-94°C. This temperature and time range can make the raw materials react fully and activate the impurity removal activity of each component. Then cool down to 50-70°C and continue stirring for 1.6-2.5 hours, which will help stabilize the reaction products and form an efficient multi-effect flux.

[0091] 2. Preparation process of high-performance recycled rare earth magnesium alloy materials from waste aluminum

[0092] Raw material dosage control: 70-79% industrial waste aluminum ingots, 5.6-10.1% rare earth recycled materials, 4.8-7.2% aluminum-based inclusions, 4.3-6.5% aluminum waste, 1.6-3.8% scrap steel, 3.5-8.7% magnesium blocks, 1.2-2.5% magnesium bars, 0.05-0.12% silicon wafers, 0.02-0.04% aluminum-based alloys, 7.5-9.6% multi-effect flux, and the remaining zinc flakes. Precise control of the dosage of each raw material is the key to ensuring the performance of the alloy. For example, too much rare earth recycled materials may lead to a substantial increase in alloy costs and excessive accumulation of certain rare earth elements will affect the toughness of the alloy; if the proportion of industrial waste aluminum ingots is too low, the advantages of waste aluminum utilization cannot be fully reflected, and the cost cannot be reduced.

[0093] Optimization of process parameters: The mixed materials are cleaned and pre-treated, including crushing, screening, and spheroidization. The materials are crushed into small particles for subsequent smelting. The mixed materials are screened to select particles smaller than 10 mm. The spheroidization is carried out by mechanical drum rotation and spraying flux. The spheroidization temperature of the mixed materials is controlled to be ≤370°C. The particle size of the mixed materials after spheroidization is controlled to be 7-9mm. These parameters ensure that the raw materials are mixed evenly, impurities are effectively removed, and the spheroidization effect is good, providing high-quality raw materials for smelting. The mixed materials after cleaning and pre-treatment are poured into the smelting furnace, and the heating rate is 82-95°C / h. After heating to 780-920°C, the mixed materials are melted into liquid. Reasonable heating rate and melting temperature ensure the smooth melting of the raw materials to avoid local overheating or incomplete melting. After the mixed material is melted in the smelting furnace, 0.5-0.8wt% of aluminum powder is added and stirred evenly. The molten liquid is stirred for 3-5 minutes, and then it is placed at 940-1050℃ for 6-9 minutes for refining. During refining, 0.12-0.35% of aluminum powder is added. The precise process parameters ensure uniform alloy composition, further removal of impurities, and significant refining effect. During smelting, a composite covering agent is added to the smelting furnace according to 4.8-7.6wt% of the weight of the mixed material in the smelting furnace. The covering agent effectively isolates the air, prevents oxidation, and ensures the smelting quality. After the smelting of the molten liquid in the smelting furnace is completed, the molten liquid is introduced into the refining furnace, and aluminum powder is used to cover 1-1.2mm. The molten liquid in the refining furnace is refined for 15-23 minutes, and further deep refined to ensure excellent alloy performance.

[0094] In summary, through the careful selection of raw materials, precise control of dosage and in-depth optimization of process parameters in the preparation of multi-effect flux and high-performance scrap aluminum recycled rare earth magnesium alloy materials, unexpected technical effects have been achieved, realizing multiple advantages such as efficient impurity removal, excellent performance, cost advantage, low hydrogen content and green environmental protection, opening up a new path for the high-value utilization of scrap aluminum.

[0095] In order to make the disclosure of the present invention more complete, it is described below through more specific embodiments.

[0096] Example 1

[0097] A multi-effect flux with the functions of removing impurities and iron, comprising the following raw materials in parts by weight: 92 parts of composite fluoride salt, 140 parts of boron salt, 101 parts of chloride salt, 21 parts of sodium salt, 36 parts of phosphate salt, 7 parts of sulphur salt, 2 parts of molybdenum salt and 5 parts of manganese salt.

[0098] The composite fluoride salt is sodium fluoride and potassium fluoride in a ratio of 1:1;

[0099] The boron salt is borax;

[0100] The chloride salt is potassium chloride;

[0101] The sodium salt is sodium hydroxide;

[0102] The phosphate salt is potassium dihydrogen phosphate;

[0103] The thionium salt is sodium sulfate;

[0104] The molybdenum salt is potassium molybdate;

[0105] The manganese salt is manganese nitrate.

[0106] The preparation method of the multi-effect flux having the functions of removing impurities and iron in one comprises the following steps:

[0107] Step 1: Weigh the components of composite fluoride salt, boron salt, chloride salt and sodium salt in proportion and mix them, and sieve the mixed raw materials to obtain a primary mixture;

[0108] Step 2: weigh components such as manganese salt and molybdenum salt according to proportion and mix them, and sieve the mixed raw materials to obtain a secondary mixture;

[0109] Step 3: Weigh the components of phosphorus salt and sulfur salt according to proportion and mix them. The mixed raw materials are all sieved to obtain a tertiary mixture;

[0110] Step 4: Add water to the first mixture, the second mixture and the third mixture, the total weight of water added is 25.3% of the total weight of the mixture, stir and heat to increase the temperature, continue stirring for 4 hours when the temperature reaches 83°C, then cool to 56°C, continue stirring for 2 hours, and obtain a multi-effect flux that has multiple functions of removing impurities and iron.

[0111] A method for preparing a high-performance waste aluminum recycled rare earth magnesium alloy material comprises the following steps:

[0112] Step 1, take 72.1% of industrial waste aluminum ingots, 5.6% of rare earth recycling materials, 5.0% of aluminum-based inclusions, 4.3% of aluminum waste, 1.8% of scrap steel, 3.8% of magnesium blocks, 1.4% of magnesium bars, 0.06% of silicon wafers, 0.02% of aluminum-based alloys, 7.8% of multi-effect flux, and the remainder of zinc flakes, weigh them according to the above weight percentages, and mix them evenly to obtain a mixture; the mixture is cleaned and impurity-removed pretreatment, and the cleaning and impurity-removing pretreatment includes crushing, screening, and spheroidization, the mixture is crushed into small particles, and the mixed particles less than 10mm are selected by screening; in the cleaning and impurity-removing pretreatment, the mixed material is spheroidized by mechanical drum rotation, and spraying flux is used to control the spheroidization temperature of the mixed material to be ≤370°C, and the particle size of the mixed material after spheroidization is controlled to be 7-9mm;

[0113] Step 2: pour the pre-treated mixed material into a melting furnace and slowly heat it at a rate of 83°C / h until it reaches 784°C, melting the mixed material into a liquid;

[0114] Step 3: After the mixed material is melted in a smelting furnace, 0.5 wt% of aluminum powder is added thereto and stirred evenly; the molten liquid is stirred for 5 minutes;

[0115] Step 4: The mixed material in the melting furnace is placed at 945°C for 9 minutes for refining. During the refining, 0.18% aluminum powder is added to the surface of the molten liquid and stirred evenly.

[0116] Step 5, adding 4.2wt% of manganese powder, 1.1wt% of copper powder, 3.5wt% of titanium powder, 4.8wt% of calcium powder, and 2.1wt% of iron powder into a mixed material in a smelting furnace, and stirring and mixing evenly;

[0117] Step 6, melting the mixed material in a melting furnace, and during melting, adding a composite covering agent to the melting furnace according to 5.1wt% of the weight of the mixed material in the melting furnace;

[0118] Step 7: After the molten liquid in the smelting furnace is smelted, the molten liquid is introduced into the refining furnace, and aluminum powder is used to cover it with 1mm, and the molten liquid in the refining furnace is refined for 20 minutes;

[0119] Step eight, pour the refined molten liquid into a mold, and wait for cooling to obtain a high-performance waste aluminum recycled rare earth magnesium alloy material.

[0120] Example 2

[0121] A multi-effect flux with the functions of removing impurities and iron, comprising the following raw materials in parts by weight: 165 parts of composite fluoride salt, 215 parts of boron salt, 180 parts of chloride salt, 40 parts of sodium salt, 56 parts of phosphate salt, 9 parts of sulfur salt, 5 parts of molybdenum salt and 10 parts of manganese salt.

[0122] The composite fluoride salt is sodium fluoride, magnesium fluoride and lithium fluoride in a ratio of 2:1:1;

[0123] The boron salt is borax and sodium borate in a ratio of 1:1;

[0124] The chloride salt is calcium chloride and potassium chloride in a ratio of 1:3;

[0125] The sodium salt is sodium hydroxide;

[0126] The phosphate salt is hydroxyapatite and potassium dihydrogen phosphate in a ratio of 2:3;

[0127] The thionium salt is sodium sulfate and sodium thiosulfate in a ratio of 2:1;

[0128] The molybdenum salt is potassium molybdate;

[0129] The manganese salt is manganese nitrate.

[0130] The preparation method of the multi-effect flux having the functions of removing impurities and iron in one comprises the following steps:

[0131] Step 1: Weigh the components of composite fluoride salt, boron salt, chloride salt and sodium salt in proportion and mix them, and sieve the mixed raw materials to obtain a primary mixture;

[0132] Step 2: weigh components such as manganese salt and molybdenum salt according to proportion and mix them, and sieve the mixed raw materials to obtain a secondary mixture;

[0133] Step 3: Weigh the components of phosphorus salt and sulfur salt according to proportion and mix them. The mixed raw materials are all sieved to obtain a tertiary mixture;

[0134] Step 4: Add water to the first mixture, the second mixture and the third mixture, the total weight of water added is 28% of the total weight of the mixed materials, stir and heat to increase the temperature, continue stirring for 3 hours at a temperature of 90°C, then cool to 62°C, continue stirring for 2 hours, and obtain a multi-effect flux that has the functions of removing impurities and iron.

[0135] A method for preparing a high-performance waste aluminum recycled rare earth magnesium alloy material comprises the following steps:

[0136] Step 1, take 75.4% of industrial waste aluminum ingots, 8.7% of rare earth recycling materials, 5.8% of aluminum-based inclusions, 5.2% of aluminum waste, 3.1% of scrap steel, 7.5% of magnesium blocks, 2.0% of magnesium bars, 0.1% of silicon wafers, 0.03% of aluminum-based alloys, 8.5% of multi-effect flux, and the remainder of zinc flakes, weigh them according to the above weight percentages, and mix them evenly to obtain a mixture; the mixture is cleaned and impurity-removed pretreatment, and the cleaning and impurity-removing pretreatment includes crushing, screening, and spheroidization, the mixture is crushed into small particles, and the mixed particles less than 10mm are selected by screening; in the cleaning and impurity-removing pretreatment, the mixed material is spheroidized by mechanical drum rotation, and spraying flux is used to control the spheroidization temperature of the mixed material to be ≤365°C, and the particle size of the mixed material after spheroidization is controlled to be 7-8mm;

[0137] Step 2: pour the pre-treated mixed material into a smelting furnace and slowly heat it at a rate of 90°C / h until it reaches 900°C, melting the mixed material into a liquid;

[0138] Step 3: After the mixed material is melted in a smelting furnace, 0.7 wt% of aluminum powder is added thereto and stirred evenly; the molten liquid is stirred for 4 minutes;

[0139] Step 4: The mixed material in the smelting furnace is placed at 1000°C for 8 minutes for refining. During the refining, 0.28% aluminum powder is added to the surface of the molten liquid and stirred evenly.

[0140] Step 5: Add 6.2wt% of manganese powder, 1.5wt% of copper powder, 4.1wt% of titanium powder, 8.2wt% of calcium powder, and 2.3wt% of iron powder into the mixture in the smelting furnace, and stir to mix evenly;

[0141] Step 6, melting the mixed material in a melting furnace, and during melting, adding a composite covering agent to the melting furnace according to 7.2wt% of the weight of the mixed material in the melting furnace;

[0142] Step 7, after the molten liquid in the smelting furnace is smelted, the molten liquid is introduced into the refining furnace, and aluminum powder is used to cover 1.1 mm, and the molten liquid in the refining furnace is refined for 18 minutes;

[0143] Step eight, pour the refined molten liquid into a mold, and wait for cooling to obtain a high-performance waste aluminum recycled rare earth magnesium alloy material.

[0144] Example 3

[0145] A multi-effect flux with the functions of removing impurities and iron, comprising the following raw materials in parts by weight: 220 parts of composite fluoride salt, 280 parts of boron salt, 240 parts of chloride salt, 50 parts of sodium salt, 68 parts of phosphate salt, 10 parts of sulphur salt, 5 parts of molybdenum salt and 11 parts of manganese salt.

[0146] The composite fluoride salt is potassium fluoride and calcium fluoride in a ratio of 1:1;

[0147] The boron salt is sodium borate;

[0148] The chloride salt is magnesium chloride;

[0149] The sodium salt is sodium carbonate;

[0150] The phosphate salt is hydroxyapatite and potassium dihydrogen phosphate in a ratio of 1:1;

[0151] The thion salt is sodium sulfate and sodium sulfide in a ratio of 1:1;

[0152] The molybdenum salt is potassium molybdate;

[0153] The manganese salt is manganese chloride.

[0154] The preparation method of the multi-effect flux having the functions of removing impurities and iron in one comprises the following steps:

[0155] Step 1: Weigh the components of composite fluoride salt, boron salt, chloride salt and sodium salt in proportion and mix them, and sieve the mixed raw materials to obtain a primary mixture;

[0156] Step 2: weigh components such as manganese salt and molybdenum salt according to proportion and mix them, and sieve the mixed raw materials to obtain a secondary mixture;

[0157] Step 3: Weigh the components of phosphorus salt and sulfur salt according to proportion and mix them. The mixed raw materials are all sieved to obtain a tertiary mixture;

[0158] Step 4: Add water to the first mixture, the second mixture and the third mixture, the total weight of water added being 27.2% of the total weight of the mixture, stirring and heating, stirring for 3 hours at a temperature of 88°C, then cooling to 67°C, and continuing stirring for 2 hours to obtain a multi-effect flux that has the functions of removing impurities and iron.

[0159] A method for preparing a high-performance waste aluminum recycled rare earth magnesium alloy material comprises the following steps:

[0160] Step 1, take 74.2% of industrial waste aluminum ingots, 9.2% of rare earth recovery materials, 6.3% of aluminum-based inclusions, 6.4% of aluminum waste, 3.6% of scrap steel, 8.0% of magnesium blocks, 2.5% of magnesium bars, 0.12% of silicon wafers, 0.02% of aluminum-based alloys, 9.4% of multi-effect flux, and the remainder of zinc flakes, weigh them according to the above weight percentages, and mix them evenly to obtain a mixture; the mixture is cleaned and impurity-removed pretreatment, and the cleaning and impurity-removing pretreatment includes crushing, screening, and spheroidization, the mixture is crushed into small particles, and the mixed particles less than 10mm are selected by screening; in the cleaning and impurity-removing pretreatment, the mixed material is spheroidized by mechanical drum rotation, and spraying flux is used to control the spheroidization temperature of the mixed material to be ≤368°C, and the particle size of the mixed material after spheroidization is controlled to be 8-9mm;

[0161] Step 2: pour the pre-treated mixed material into a smelting furnace and slowly heat it up at a rate of 86°C / h until it reaches 880°C, melting the mixed material into a liquid;

[0162] Step 3, after the mixed material is melted in the smelting furnace, 0.8wt% of aluminum powder is added thereto and stirred evenly; the molten liquid is stirred for 4 minutes;

[0163] Step 4: The mixed material in the melting furnace is placed at 980°C for 7 minutes for refining. During the refining, 0.25% aluminum powder is added to the surface of the molten liquid and stirred evenly.

[0164] Step 5: Add 6.3wt% of manganese powder, 1.2wt% of copper powder, 4.3wt% of titanium powder, 11.8wt% of calcium powder, and 2.4wt% of iron powder into the mixture in the smelting furnace, and stir to mix evenly;

[0165] Step 6, melting the mixed material in a melting furnace, and during melting, adding a composite covering agent to the melting furnace according to 7.5wt% of the weight of the mixed material in the melting furnace;

[0166] Step 7, after the molten liquid in the smelting furnace is smelted, the molten liquid is introduced into the refining furnace, and aluminum powder is used to cover 1mm, and the molten liquid in the refining furnace is refined for 17 minutes;

[0167] Step eight, pour the refined molten liquid into a mold, and wait for cooling to obtain a high-performance waste aluminum recycled rare earth magnesium alloy material.

[0168] Comparative Example 1

[0169] The preparation process is basically the same as that of Example 2, except that the raw material of the multi-effect flux with multiple functions of removing impurities and iron lacks composite fluoride salt, and other raw materials and proportions remain unchanged. The flux is made according to the original preparation method and used for alloy preparation.

[0170] Comparative Example 2

[0171] The preparation process is basically the same as that of Example 2, except that the raw materials of the multi-effect flux with multiple functions of removing impurities and iron lack sulfide salts, and other raw materials and proportions remain unchanged. The flux is made according to the original preparation method and used for alloy preparation.

[0172] Comparative Example 3

[0173] The preparation process is basically the same as that of Example 2, except that the spheroidization step is eliminated in the alloy preparation process.

[0174] The waste aluminum recycled rare earth magnesium alloy materials obtained in Examples 1-3 and Comparative Examples 1-3 were tested, wherein the tensile strength of the alloy was tested using a universal material testing machine, the hardness was tested according to GB / T231.1-2018 standard, and the hydrogen content was determined using a gas analyzer. The results are shown in the following table.

[0175]

[0176] It can be seen from the above table:

[0177] (1) From the data of Examples 1-3, it can be seen that the tensile strength of the recycled rare earth magnesium alloy material from waste aluminum prepared by the present invention is above 250.8MPa, the hardness is above 81.5HBW, and the hydrogen content is below 0.09mL / 100gA1. The recycled rare earth magnesium alloy material from waste aluminum of the present invention has excellent performance. In theory, the fine impurity removal of the multi-effect flux provides a pure matrix for the alloy, and the reasonable raw material ratio and process parameters ensure uniform distribution of elements and grain refinement, thereby achieving high performance indicators, meeting the technical requirements of ZL106, and opening up a new way for the recycling and reuse of waste aluminum.

[0178] (2) Compared with the preparation process of Example 2, Comparative Example 1 lacks composite fluoride salts and cannot effectively cover and adsorb inclusions, resulting in an increase in impurities, deterioration of mechanical properties and hydrogen content, and reduced waste utilization. This is because the present invention selects at least two of sodium fluoride, potassium fluoride, calcium fluoride, magnesium fluoride, and lithium fluoride to form composite fluoride salts. Its unique chemical properties enable it to cover and adsorb inclusions during the aluminum liquid treatment process, just like a fine filter, accurately capturing tiny impurity particles in the aluminum liquid, playing a key role in purification, inclusion deoxidation, purification and refining, laying the foundation for subsequent high-purity aluminum liquid.

[0179] (3) Compared with the preparation process of Example 2, the flux system of Comparative Example 2 lacks sulfur salt, and the hydrogen content increases to 0.19mL / 100gAl, resulting in a decrease in mechanical properties. This is because the sulfur salt of the present invention is selected from at least one of sodium sulfate, sodium sulfite, sodium sulfide, and sodium thiosulfate. The sulfur element can undergo a sulfidation reaction with some metal impurities to generate sulfide precipitates, thereby separating the impurities from the aluminum liquid and improving the purity of the aluminum liquid.

[0180] (4) Compared with the preparation process of Example 2, the lack of spheroidization in Comparative Example 3 resulted in uneven raw material particle size, insufficient smelting, affecting the alloying effect, and reducing the mechanical properties. This is because the spheroidization of the present invention uses mechanical drum rotation, supplemented by spraying flux, to control the mixed material spheroidization temperature ≤ 370°C, and the mixed material particle size after spheroidization is controlled at 7-9mm. These parameters ensure that the raw materials are mixed evenly, impurities are effectively removed, and the spheroidization effect is good, providing high-quality raw materials for smelting. If the spheroidization step is missing, the mechanical properties will be reduced.

[0181] The above contents are further detailed descriptions of the present invention in combination with specific / preferred implementations, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, they can also make several substitutions or modifications to these described embodiments without departing from the concept of the present invention, and these substitutions or modifications should be regarded as belonging to the protection scope of the present invention.

Claims

1. A multi-effect flux that has the functions of removing impurities and iron, characterized in that: The raw materials are as follows: 90-230 parts of composite fluoride salt, 140-300 parts of boron salt, 100-250 parts of chloride salt, 20-56 parts of sodium salt, 35-75 parts of phosphorus salt, 5-12 parts of sulfur salt, 2-6 parts of molybdenum salt and 5-14 parts of manganese salt.

2. The multi-effect flux having the functions of removing impurities and iron according to claim 1, characterized in that: The composite fluoride salt includes at least two of sodium fluoride, potassium fluoride, calcium fluoride, magnesium fluoride and lithium fluoride.

3. The multi-effect flux having the functions of removing impurities and iron according to claim 1, characterized in that: The boron salt includes at least one of borax, boric acid or sodium borate.

4. The multi-effect flux having the functions of removing impurities and iron according to claim 1, characterized in that: The chloride salt includes at least one of calcium chloride, potassium chloride, magnesium chloride, lithium chloride and sodium chloride.

5. The multi-effect flux having the functions of removing impurities and iron as one of claim 1, characterized in that: The sodium salt includes at least one of sodium hydroxide and sodium carbonate.

6. The multi-effect flux having the functions of removing impurities and iron as one of claim 1, characterized in that: The phosphate salt includes at least one of hydroxyapatite and potassium dihydrogen phosphate.

7. The multi-effect flux having the functions of removing impurities and iron as one of claim 1, characterized in that: The sulfur salt includes at least one of sodium sulfate, sodium sulfite, sodium sulfide and sodium thiosulfate.

8. The multi-effect flux having the functions of removing impurities and iron as one of claim 1, characterized in that: The molybdenum salt is potassium molybdate, and the manganese salt includes at least one of manganese carbonate, manganese sulfate, manganese nitrate and manganese chloride.

9. A method for preparing a multi-effect flux having the functions of removing impurities and iron according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: Weigh the components of composite fluoride salt, boron salt, chloride salt and sodium salt in proportion and mix them, and sieve the mixed raw materials to obtain a primary mixture; Step 2: weigh components such as manganese salt and molybdenum salt according to proportion and mix them, and sieve the mixed raw materials to obtain a secondary mixture; Step 3: Weigh the components of phosphorus salt and sulfur salt according to proportion and mix them. The mixed raw materials are all sieved to obtain a tertiary mixture; Step 4: Add water to the first mixture, the second mixture and the third mixture, the total weight of the water added is 24-30% of the total weight of the mixed materials, stir and heat to increase the temperature, continue stirring for 2-4 hours when the temperature reaches 82-94°C, then cool to 50-70°C, continue stirring for 1.6-2.5 hours, and obtain a multi-effect flux that has the functions of removing impurities and iron.

10. An application of a multi-effect flux having the functions of removing impurities and irons prepared by the method according to claim 9 in the production of high-performance recycled rare earth magnesium alloy materials from scrap aluminum, characterized in that: The method for preparing the high-performance waste aluminum recycled rare earth magnesium alloy material comprises the following steps: Step 1, take 70-79% of industrial waste aluminum ingots, 5.6-10.1% of rare earth recovery materials, 4.8-7.2% of aluminum-based inclusions, 4.3-6.5% of aluminum waste, 1.6-3.8% of scrap steel, 3.5-8.7% of magnesium blocks, 1.2-2.5% of magnesium bars, 0.05-0.12% of silicon wafers, 0.02-0.04% of aluminum-based alloys, 7.5-9.6% of multi-effect flux, and the remainder of zinc flakes, weigh them according to the above weight percentages, and mix them evenly to obtain a mixture; the mixture is cleaned and impurity-removed pretreatment, and the cleaning and impurity-removing pretreatment includes crushing, screening, and spheroidization, the mixture is crushed into small particles, and the mixed particles less than 10mm are selected by screening; in the cleaning and impurity-removing pretreatment, the mixed material is spheroidized by mechanical drum rotation, and spraying flux is used to control the spheroidization temperature of the mixed material to be ≤370°C, and the particle size of the mixed material after spheroidization is controlled to be 7-9mm; Step 2: pour the pre-treated mixed material into a melting furnace and slowly heat it up at a rate of 82-95°C / h until it reaches 780-920°C, melting the mixed material into a liquid; Step 3, after the mixed material is melted in the smelting furnace, 0.5-0.8wt% of aluminum powder is added thereto and stirred evenly; the molten liquid is stirred for 3-5 minutes; Step 4: The mixed material in the smelting furnace is placed at 940-1050°C for 6-9 minutes for refining. During the refining, 0.12-0.35% aluminum powder is added to the surface of the molten liquid and stirred evenly. Step 5, adding 4.1-6.5wt% of manganese powder, 1.0-1.9wt% of copper powder, 3.2-4.6wt% of titanium powder, 4.7-12.1wt% of calcium powder, and 1.5-2.8wt% of iron powder to the mixture in the smelting furnace, and stirring and mixing evenly; Step 6, melting the mixed material in a melting furnace, and during melting, adding a composite covering agent to the melting furnace according to 4.8-7.6wt% of the mixed material weight in the melting furnace; Step 7, after the molten liquid in the smelting furnace is smelted, the molten liquid is introduced into the refining furnace, and aluminum powder is used to cover 1-1.2 mm, and the molten liquid in the refining furnace is refined for 15-23 minutes; Step eight, pour the refined molten liquid into a mold, and wait for cooling to obtain a high-performance waste aluminum recycled rare earth magnesium alloy material.

Images