Method for preserving and regenerating Fe-containing aluminum alloy waste

Abstract

The invention belongs to the technical field of non-ferrous metal smelting, and particularly relates to a grade-preserving regeneration method for Fe-containing aluminum alloy waste. According to the method, Mn, Cr, Mo, Co, V, Ni and W transition metal elements are added into an aluminum alloy waste melt, and after the alloy elements are fully melted, the melt is cooled to a certain temperature interval, so that Fe-containing compound particles are fully formed and grow up. And after heat preservation is completed, the melt is transferred into a supergravity centrifugal separator with a ceramic filter screen, the supergravity centrifugal separator is started, under the action of supergravity and the ceramic filter screen, Fe-containing compound particles are rapidly separated from the melt, and the Fe content in the alloy melt is remarkably reduced. According to the method, the Fe content in the aluminum alloy waste can be rapidly and efficiently reduced, meanwhile, the aluminum melt can be continuously treated on a large scale, and high-quality preservation regeneration of the aluminum alloy waste is effectively achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of nonferrous metal smelting, and in particular relates to a method for regenerating Fe-containing aluminum alloy waste while preserving its grade. Background Art

[0002] Aluminum alloys are widely used in aerospace, transportation and other fields due to their low density, excellent mechanical properties, easy processing and good corrosion resistance. Recycled aluminum has become an important trend in the development of the industry due to its significant advantages such as energy saving and environmental protection. In the recycling process of aluminum alloys, the content of impurity elements is easy to exceed the standard and it is difficult to remove, which often leads to the alloy being downgraded after recycling, resulting in waste of resources. Fe is one of the main impurity elements in aluminum alloy waste. Excessive Fe content often leads to the appearance of coarse intermetallic compounds, which seriously reduces the mechanical properties and service performance of the alloy. Therefore, reducing the Fe content in aluminum alloys is of great significance to the high-quality recycling of aluminum alloy waste.

[0003] Converting Fe elements into Fe-containing compounds and separating the Fe-containing compounds is an important method for reducing the Fe content of aluminum alloys. Chinese invention patent CN 111254303 B discloses a method for improving the morphology of iron-rich phases and reducing iron in recycled aluminum. This method adds a certain amount of Mn element to recycled Al-Si alloy waste to obtain an iron-rich phase, and separates the iron-rich phase by gravity sedimentation to reduce the Fe content in the alloy. However, due to the long time required for gravity sedimentation and the influence of factors such as the size of Fe-containing compounds and the formation temperature, the sedimentation separation efficiency is low. And this method only has a certain Fe-reducing effect on alloy waste with a high Fe content (>0.9wt.%). Chinese invention patent CN 116162801 A discloses a method for removing iron from recycled aluminum using a gradient magnetic field. This method uses the difference in the gradient magnetic field force exerted on the recycled aluminum melt and the iron-rich phase to control the directional migration of the iron-rich phase away from the solidification interface, thereby achieving the removal of Fe elements in recycled aluminum. However, for small Fe-containing compounds, the separation efficiency is low, and due to equipment conditions, this method is difficult to continuously and large-scale aluminum melt processing and cannot be industrialized. Chinese invention patent CN 114849266A discloses an ultra-gravity centrifugal separator with improved separation efficiency, which uses the gravity acceleration generated by the high-speed rotation of the equipment to separate the distilled liquid, significantly improving the separation efficiency.

[0004] Gravity sedimentation separation of Fe-containing compounds takes a long time, and the separation efficiency of Fe-containing compounds with small size is low, and the separation efficiency of Fe element is low. The electromagnetic separation method cannot operate continuously and process large quantities of waste, and it is difficult to apply it industrially. Therefore, it is of great significance to develop a method to achieve grade-preserving regeneration of aluminum alloy scrap by reducing the Fe content. Summary of the invention

[0005] In view of the problem that the current aluminum alloy recycling waste has low Fe removal efficiency and thus cannot be regenerated with maintained grade, the present invention proposes a method for maintaining grade of Fe-containing aluminum alloy waste to improve the Fe element separation efficiency and promote high-quality maintenance and regeneration of recycled aluminum alloy waste.

[0006] In order to solve the above-mentioned technical problems, this application provides the following technical solutions:

[0007] The present invention provides a method for regenerating Fe-containing aluminum alloy waste in a grade-preserving manner, comprising the following steps:

[0008] S1: After measuring the Fe content in the aluminum alloy waste, the recycled aluminum alloy waste is smelted to obtain an alloy melt; the smelting temperature is 720-810°C;

[0009] S2: adding metal elements to the alloy melt, and keeping the temperature at 720-790°C for 20-60min; the metal elements are selected from one, two or three of Mn, Cr, Mo, Co, Be, V, Ni and W; the mass ratio of the metal elements to Fe is 2-14:1, and the adding temperature is 720-790°C;

[0010] S3: cooling the alloy melt after the heat preservation in step S2 to 625-710° C. and then continuing to keep the temperature for 30-120 minutes to form Fe-containing compound particles;

[0011] S4: separating Fe-containing compound particles from the alloy melt after heat preservation in step S3 in an ultra-gravity centrifugal separator, and collecting the alloy melt with low Fe content.

[0012] Preferably, the content of each element in the aluminum alloy scrap is in the range of Si 0.5-13%, Mg 0-0.5%, Cu 0-3%, Fe 0.3-2.5%, Zn 0-4%, Ti≤0.5%, and the rest is Al.

[0013] Preferably, in step S2, when the metal element contains Mn, the mass ratio of Mn to Fe is 2-7:1; when the metal element contains Mn and Cr, the mass ratio of the total mass of Mn and Cr to Fe is 3-12:1; when the metal element contains Cr and Mo, the mass ratio of the total mass of Cr and Mo to Fe is 2-11:1; when the metal element contains Mn and Co, the mass ratio of the total mass of Mn and Co to Fe is 1.5-13:1; when the metal element contains Co and Be, the mass ratio of the total mass of Co and Be to Fe is 2.2-13.5:1; when the metal element contains Be and V, the mass ratio of the total mass of Be and V to Fe is 2.5-14:1; when the metal element is selected from Mn, Cr and W, the mass ratio of the total mass of Mn, Cr and W to Fe is 2-10:1.

[0014] Preferably, in step S3, the cooling rate is 1.5-5.5°C / min.

[0015] Preferably, in step S3, coarse Fe-containing compound particles are formed at 650-710° C. during heat preservation; the Fe-containing compound particles have a Young's modulus of 150-310 GPa, a size of about 80-1500 μm, and a morphology of a cube, a rhombic dodecahedron, a petal or a dendrite.

[0016] Preferably, the present invention utilizes the ultra-gravity centrifugal separator in CN 114849266A; the ultra-gravity centrifugal separator comprises a centrifugal motor, a heating resistance wire, a graphite crucible, a ceramic filter and a thermocouple.

[0017] Furthermore, in the ultragravity centrifugal separator, the pore size of the ceramic filter is 50-400 μm.

[0018] Furthermore, in the ultragravity centrifugal separator, the pores of the ceramic filter are S-shaped, X-shaped or Z-shaped.

[0019] Furthermore, in the ultra-gravity centrifugal separator, the material of the ceramic filter is selected from Al2O3, SiC, Al2O3-C, 3Al2O3·2SiO2 or SiO2.

[0020] Preferably, in step S4, the separation temperature is 650-700° C., the gravity coefficient during separation is 120-1400 g, and the separation time is 5-20 min.

[0021] The technical solution of the present invention has the following advantages over the prior art:

[0022] The invention discloses a method for regenerating aluminum alloy waste with guaranteed grade. By combining ultra-gravity centrifugation with a ceramic filtration separation method, an Fe-containing compound that is more conducive to separation and an efficient separation process for Fe-containing compounds are obtained, which effectively solves the problem that the recycled aluminum alloy waste cannot be regenerated with guaranteed grade due to low Fe removal efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a comparison diagram of the structure of the aluminum alloy waste before and after Fe removal in Example 1;

[0024] Figure 2 This is a comparison diagram of the structure of the aluminum alloy waste before and after Fe removal in Example 2;

[0025] Figure 3 This is a comparison diagram of the structure of the aluminum alloy waste before and after Fe removal in Example 3;

[0026] Figure 4 This is a comparison diagram of the structure of the aluminum alloy waste before and after Fe removal in Example 4;

[0027] Figure 5 This is a comparison diagram of the structures of the aluminum alloy waste before and after Fe removal in Example 5. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0029] Example 1

[0030] Taking aluminum alloy scrap with a mass ratio of 0.3% of Fe impurity element as an example, the above-mentioned Fe separation method is implemented. The specific composition mass percentages of the alloy are: Si 10.5%, Mg 0.5%; Fe 0.3%; Ti≤0.2%; the rest is Al. The Fe element separation method includes the following steps:

[0031] S1: Sampling and determining the Fe content in aluminum alloy scrap, followed by smelting at 720°C;

[0032] S2: According to the Fe content in the aluminum alloy scrap, Mn, Cr and W elements are added to the melt in a mass ratio of Mn+Cr+W:Fe of 6:1; wherein the mass ratio of the added Mn element to the Fe element is 2, the mass ratio of the added Cr element to the Fe element is 2, and the mass ratio of the added W element to the Fe element is 2;

[0033] S3: After all the added Mn, Cr and W elements are melted, the alloy melt is kept at 750°C for 30 minutes;

[0034] S4: The precipitation temperature of Fe-containing compounds is determined to be 645°C by thermodynamic calculation;

[0035] S5: After the heat preservation is completed, the melt is cooled to 625°C and kept for 30 minutes, and the cooling rate of the melt is 1.5°C / min;

[0036] S6: The melt after heat preservation is transferred to an ultra-gravity centrifugal separator with a ceramic filter, and the ultra-gravity centrifugal separator is started to separate the Fe-containing intermetallic compounds in the melt. The gravity coefficient used is 200g, and the separation time is 20min. The ceramic filter is made of Al2O3, has a pore size of 50μm, and has an S-shaped pore.

[0037] S7: By collecting the low Fe content melt, efficient Fe removal from the alloy is achieved.

[0038] Comparative Example 1

[0039] Taking aluminum alloy scrap with a mass ratio of 0.3% of Fe impurity element as an example, the Fe-containing phase is separated by a conventional gravity sedimentation method, and the specific composition mass percentages of the alloy are: Si 10.5%, Mg 0.5%, Fe 0.7%; Ti≤0.3%; the rest is Al. The method comprises the following steps:

[0040] S1, sampling and determining the content of Fe element in aluminum alloy waste, and then smelting at 720°C;

[0041] S2. After smelting is completed, the melt is cooled to 625°C and kept warm for 30 minutes;

[0042] S3, the melt is kept at 625°C for 20 min;

[0043] Table 1 The comparison of the precipitation effect of Fe element in Example 1 and Comparative Example 1 is as follows:

[0044] Table 1 Comparison of Fe content change and Fe removal efficiency in Example 1 and Comparative Example 1 (wt%)

[0045] Before Fe removal After Fe removal Fe removal rate (%) Example 1 0.3 0.07 76.7 Comparative Example 1 0.3 0.18 40

[0046] Example 2

[0047] Taking aluminum alloy scrap with a mass ratio of 1.8% of Fe impurity elements as an example, the above-mentioned Fe separation method is implemented. The specific composition mass percentages of the alloy are: Si 7.2%, Mg 0.3%, Cu≤1.4%; Fe 1.8%; Zn≤1.9%; Ti≤0.5%; the rest is Al. The Fe element separation method includes the following steps:

[0048] S1: Sampling and determining the Fe content in aluminum alloy scrap, followed by smelting at 750°C;

[0049] S2: according to the Fe content in the aluminum alloy scrap, Mn and Cr elements are added to the melt in a mass ratio of Mn+Cr:Fe of 3:1; wherein the mass ratio of the added Mn element to the Fe element is 2, and the mass ratio of the added Cr element to the Fe element is 1;

[0050] S3: After all the added Mn and Cr elements are melted, the alloy melt is kept at 750°C for 30 minutes;

[0051] S4: The precipitation temperature of Fe-containing compounds is determined to be 675°C by thermodynamic calculation;

[0052] S5: After the heat preservation is completed, the melt is cooled to 650°C and kept for 30 minutes, and the cooling rate of the melt is 2°C / min;

[0053] S6: The heat-insulated melt is transferred to an ultra-gravity centrifugal separator with a ceramic filter, and the ultra-gravity centrifugal separator is started to separate the Fe-containing intermetallic compounds in the melt. The adopted gravity coefficient is 400g and the separation time is 40min. The ceramic filter is made of SiC, has a pore size of 80μm, and has an X-shaped pore.

[0054] S7: By collecting the low Fe content melt, efficient Fe removal from the alloy is achieved.

[0055] Comparative Example 2

[0056] Taking aluminum alloy scrap with a mass ratio of 0.55% of Fe impurity elements as an example, the Fe-containing phase is separated by a conventional gravity sedimentation method, and the specific composition mass percentages of the alloy are: Si 7.2%, Mg 0.3%, Cu≤1.4%; Fe 1.8%; Zn≤1.9%; Ti≤0.5%; the rest is Al; the rest is Al. The method comprises the following steps:

[0057] S1, sampling and determining the content of Fe element in aluminum alloy waste, and then smelting at 750°C;

[0058] S2. After smelting is completed, the melt is cooled to 650°C and kept warm for 30 minutes;

[0059] S3, the melt is kept at 650°C for 40 minutes;

[0060] Table 2 The comparison of the precipitation effect of Fe element in Example 2 and Comparative Example 2 is as follows:

[0061] Table 2 Comparison of Fe content change and Fe removal efficiency in Example 2 and Comparative Example 2 (wt%)

[0062] Before Fe removal After Fe removal Fe removal rate (%) Example 2 1.8 0.21 88.3 Comparative Example 2 1.8 1.34 25.6

[0063] Example 3

[0064] Taking aluminum alloy scrap with a mass ratio of 2.5% of Fe impurity elements as an example, the above-mentioned Fe separation method is implemented. The specific composition mass percentages of the alloy are: Si 9.6%, Mg 0.2%, Cu≤3%; Fe 2.5%; Zn≤4%; Ti≤0.2%; the Fe element separation method includes the following steps:

[0065] S1: Sampling and determining the Fe content in aluminum alloy scrap, followed by smelting at 760°C;

[0066] S2: According to the Fe content in the aluminum alloy scrap, Mn and Cr elements are added to the melt in a mass ratio of Mn+Mo+Co:Fe of 2:1; wherein the mass ratio of the added Mn element to the Fe element is 1, the mass ratio of the added Co element to the Fe element is 0.5, and the mass ratio of the added Mo element to the Fe element is 0.5;

[0067] S3: After all the added Mn, Mo and Co elements are melted, the alloy melt is kept at 760°C for 30 minutes;

[0068] S4: The precipitation temperature of Fe-containing compounds is determined to be 700°C by thermodynamic calculation;

[0069] S5: After the heat preservation is completed, the melt is cooled to 675°C and kept for 30 minutes, and the cooling rate of the melt is 3°C / min;

[0070] The Fe-containing compounds obtained by extraction are about 100 μm in size and have a rhombic dodecahedral morphology;

[0071] S6: The heat-insulated melt is transferred to an ultra-gravity centrifugal separator with a ceramic filter, and the ultra-gravity centrifugal separator is started to separate the Fe-containing intermetallic compounds in the melt. The gravity coefficient used is 550g, and the separation time is 30min. The ceramic filter is made of Al2O3-C, has a pore size of 200μm, and a Z-shaped pore.

[0072] S7: By collecting the low Fe content melt, efficient Fe removal from the alloy is achieved.

[0073] Comparative Example 3

[0074] Taking aluminum alloy scrap with a mass ratio of 2.5% of Fe impurity elements as an example, the Fe-containing phase is separated by a conventional gravity sedimentation method, and the specific composition mass percentages of the alloy are: Si 3.5%, Mg 0.2%, Cu≤3%; Fe 2.5%; Zn≤4%; Ti≤0.2%; the rest is Al. The method comprises the following steps:

[0075] S1, sampling and determining the content of Fe element in aluminum alloy waste, and then smelting at 760°C;

[0076] S2. After smelting is completed, the melt is cooled to 675°C and kept warm for 30 minutes;

[0077] S3, the melt is kept at 675°C for 30 min;

[0078] Table 3 The comparison of the precipitation effect of Fe element in Example 3 and Comparative Example 3 is as follows:

[0079] Table 3 Fe content change and Fe removal efficiency comparison between Example 3 and Comparative Example 3 (wt%)

[0080] Before Fe removal After Fe removal Fe removal rate Example 3 2.5 0.31 87.6 Comparative Example 3 2.5 1.54 38.4

[0081] Example 4

[0082] Taking aluminum alloy scrap with a mass ratio of 1.2% of Fe impurity elements as an example, the above-mentioned Fe separation method is implemented. The specific composition mass percentages of the alloy are: Si 9.6%, Mg 0.1%, Cu 0.7%; Fe 1.2%; Zn 0.9%; Ti≤0.2%; the Fe element separation method includes the following steps:

[0083] S1: Sampling and determining the Fe content in aluminum alloy scrap, followed by smelting at 780°C;

[0084] S2: According to the Fe content in the aluminum alloy scrap, Mn, B and V elements are added to the melt in a mass ratio of Mn+B+V:Fe of 14:1; wherein the mass ratio of the added Mn element to the Fe element is 3, the mass ratio of the added B element to the Fe element is 7, and the mass ratio of the added V element to the Fe element is 4;

[0085] S3: After all the added Mn, B and V elements are melted, the alloy melt is kept at 780°C for 30 minutes;

[0086] S4: The precipitation temperature of Fe-containing compounds is determined to be 650°C by thermodynamic calculation;

[0087] S5: After the heat preservation is completed, the melt is cooled to 625°C and kept for 30 minutes, and the cooling rate of the melt is 2.5°C / min;

[0088] The Fe-containing compounds obtained by extraction are about 100 μm in size and have a rhombic dodecahedral morphology;

[0089] S6: The heat-insulated melt is transferred to an ultra-gravity centrifugal separator with a ceramic filter, and the ultra-gravity centrifugal separator is started to separate the Fe-containing intermetallic compounds in the melt. The gravity coefficient used is 800g, and the separation time is 25min. The ceramic filter is made of 3Al2O3-2SiO2, has a pore size of 280μm, and has an S-shaped pore channel;

[0090] S7: By collecting the low Fe content melt, efficient Fe removal from the alloy is achieved.

[0091] Comparative Example 4

[0092] Taking aluminum alloy scrap with a mass ratio of 1.2% of Fe impurity elements as an example, the Fe-containing phase is separated by a conventional gravity sedimentation method. The specific composition mass percentages of the alloy are: Si 13%, Mg 0.1%, Cu 0.7%; Fe 1.2%; Zn 0.9%; Ti ≤ 0.2%; the rest is Al. The method comprises the following steps:

[0093] S1, sampling and determining the content of Fe element in aluminum alloy waste, and then smelting at 780°C;

[0094] S2. After smelting is completed, the melt is cooled to 625°C and kept warm for 30 minutes;

[0095] S3, the melt is kept at 625°C for 10 min;

[0096] Table 4 The comparison of the precipitation effect of Fe element in Example 4 and Comparative Example 4 is as follows:

[0097] Table 4 Fe content change and Fe removal efficiency comparison between Example 4 and Comparative Example 4 (wt%)

[0098] Before Fe removal After Fe removal Fe removal rate Example 4 1.2 0.21 82.5 Comparative Example 4 1.2 0.74 38.3

[0099] Example 5

[0100] Taking aluminum alloy scrap with a mass ratio of Fe impurity element of 0.7% as an example, the above-mentioned Fe separation method is implemented, and the specific composition mass percentages of the alloy are: Si 9.6%, Mg 0.4%, Cu≤2.2%; Fe 0.7%; Zn≤3.7%; Ti≤0.2%; the Fe element separation method includes the following steps:

[0101] S1: Sampling and determining the Fe content in aluminum alloy scrap, followed by smelting at 810°C;

[0102] S2: according to the Fe content in the aluminum alloy scrap, Mn, Ni and V elements are added to the melt in a mass ratio of Mn+Ni+V:Fe of 12:1; wherein the mass ratio of the added Mn element to the Fe element is 6, the mass ratio of the added Ni element to the Fe element is 4, and the mass ratio of the added V element to the Fe element is 2;

[0103] S3: After all the added Mn, Ni and V elements are melted, the alloy melt is kept at 810°C for 30 minutes;

[0104] S: The precipitation temperature of Fe-containing compounds is determined to be 740°C by thermodynamic calculation;

[0105] S5: After the heat preservation is completed, the melt is cooled to 720°C and kept for 30 minutes, and the cooling rate of the melt is 5.5°C / min;

[0106] The Fe-containing compounds obtained by extraction are about 100 μm in size and have a rhombic dodecahedral morphology;

[0107] S6: The melt after heat preservation is transferred to an ultra-gravity centrifugal separator with a ceramic filter, and the ultra-gravity centrifugal separator is started to separate the Fe-containing intermetallic compounds in the melt. The gravity coefficient used is 1200g, and the separation time is 35min. The ceramic filter is made of SiO2, has a pore size of 320μm, and has an X-shaped pore.

[0108] S7: By collecting the low Fe content melt, efficient Fe removal from the alloy is achieved.

[0109] Comparative Example 5

[0110] Taking aluminum alloy scrap with a mass ratio of 0.7% of Fe impurity element as an example, the Fe-containing phase is separated by a conventional gravity sedimentation method, and the specific composition mass percentages of the alloy are: Si 9.6%, Mg 0.4%, Cu≤2.2%; Fe 0.7%; Zn≤3.7%; Ti≤0.2%; the rest is Al. The method comprises the following steps:

[0111] S1, sampling and determining the content of Fe in aluminum alloy waste, and then smelting at 810°C;

[0112] S2. After smelting is completed, the melt is cooled to 720°C and kept warm for 30 minutes;

[0113] S3, the melt is kept at 720°C for 10 min;

[0114] Table 5 Comparison of the precipitation effect of Fe element in Example 5 and Comparative Example 5

[0115] Table 5 Fe content change and Fe removal efficiency comparison between Example 5 and Comparative Example 5 (wt%)

[0116] Before Fe removal After Fe removal Fe removal rate Example 5 0.7 0.11 84.3 Comparative Example 5 0.7 0.44 37.1

[0117] Obviously, the above embodiments are merely examples for clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the protection scope of the invention.

Claims

1. A method for regenerating Fe-containing aluminum alloy waste, characterized in that: The following steps are involved: S1: After measuring the Fe content in the aluminum alloy waste, the recycled aluminum alloy waste is smelted to obtain an alloy melt; the smelting temperature is 720-810°C; S2: adding metal elements to the alloy melt, and keeping the temperature at 720-790°C for 20-60min; the metal elements are selected from one, two or three of Mn, Cr, Mo, Co, Be, V, Ni and W; the mass ratio of the metal elements to Fe is 2-14:1, and the adding temperature is 720-790°C; S3: cooling the alloy melt after the heat preservation in step S2 to 625-710° C. and then continuing to keep the temperature for 30-120 minutes to form Fe-containing compound particles; S4: separating Fe-containing compound particles from the alloy melt after heat preservation in step S3 in an ultra-gravity centrifugal separator, and collecting the alloy melt with low Fe content.

2. The method for regenerating Fe-containing aluminum alloy waste according to claim 1, characterized in that: Calculated by weight, the content of each element in the aluminum alloy waste is in the range of: Si 0.5-13%, Mg 0-0.5%, Cu 0-3%, Fe 0.3-2.5%, Zn 0-4%, Ti≤0.5%, and the rest is Al.

3. The method for regenerating Fe-containing aluminum alloy waste according to claim 1, characterized in that: In step S2, when the metal element contains Mn, the mass ratio of Mn to Fe is 2-7:1; when the metal element contains Mn and Cr, the mass ratio of the total mass of Mn and Cr to Fe is 3-12:1; when the metal element contains Cr and Mo, the mass ratio of the total mass of Cr and Mo to Fe is 2-11:1; when the metal element contains Mn and Co, the mass ratio of the total mass of Mn and Co to Fe is 1.5-13:1; when the metal element contains Co and Be, the mass ratio of the total mass of Co and Be to Fe is 2.2-13.5:1; when the metal element contains Be and V, the mass ratio of the total mass of Be and V to Fe is 2.5-14:1; when the metal element is selected from Mn, Cr and W, the mass ratio of the total mass of Mn, Cr and W to Fe is 2-10:

1.

4. The method for regenerating Fe-containing aluminum alloy waste according to claim 1, characterized in that: In step S3, the cooling rate is 1.5-5.5°C / min.

5. The method for regenerating Fe-containing aluminum alloy waste according to claim 1, characterized in that: In the step S3, coarse Fe-containing compound particles are formed at 650-710° C. during heat preservation; the Fe-containing compound particles have a Young's modulus value of 150-310 GPa, a size of about 80-1500 μm, and a morphology of cube, rhombic dodecahedron, petal or dendrite.

6. The method for regenerating Fe-containing aluminum alloy waste according to claim 1, characterized in that: The ultra-gravity centrifugal separator comprises a centrifugal motor, a heating resistance wire, a graphite crucible, a ceramic filter screen and a thermocouple.

7. The method for regenerating Fe-containing aluminum alloy waste according to claim 6, characterized in that: In the ultra-gravity centrifugal separator, the pore size of the ceramic filter is 50-400 μm.

8. The method for regenerating Fe-containing aluminum alloy waste according to claim 6, characterized in that: In the ultra-gravity centrifugal separator, the pores of the ceramic filter are S-shaped, X-shaped or Z-shaped.

9. The method for regenerating Fe-containing aluminum alloy waste according to claim 6, characterized in that: In the ultra-gravity centrifugal separator, the material of the ceramic filter is selected from Al2O3, SiC, Al2O3-C, 3Al2O3·2SiO2 or SiO2.

10. The method for regenerating Fe-containing aluminum alloy waste according to claim 1, characterized in that: In step S4, the separation temperature is 650-700° C., the gravity coefficient during separation is 120-1400 g, and the separation time is 5-20 min.

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