Aluminum alloy melt purification process system and purification process

Abstract

The present invention discloses an aluminum alloy melt purification process system and a purification process, which belongs to the technical field of aluminum alloy melt purification. The purification system includes a loading area, a melting pool, an insulation pool, a refining pool, a filtering pool and a material taking pool which are connected in sequence. The bottom or side of the insulation pool, the refining pool and the filtering pool are each provided with one or more jet mechanisms, and the jet mechanisms are used to spray jets into each of the pools. The refining pool is also provided with a mechanical degassing mechanism, and the mechanical rod of the mechanical degassing mechanism is located in the refining pool. The purification process system of the present invention adds a filtering pool between the refining pool and the material taking pool, thereby increasing the process beat, and adding rare earth refiners and modifier alloys to the refining pool so that they can be fully refined and modified in the filtering pool, thereby improving the quality of the aluminum melt and further improving the performance of the material.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum alloy melt purification, in particular to an aluminum alloy melt purification process system and a purification process. Background Art

[0002] The strength and toughness of cast aluminum alloy materials are affected by the chemical composition of the main alloying elements, smelting process, castability, molding process, heat treatment and the final material's organizational morphology.

[0003] Among them, strictly controlling the content of hydrogen, non-metallic inclusions, alkali metals and alkali-earth metal elements, and Fe and Si impurities in the melt can improve the quality of the aluminum melt. Among them, the hydrogen content and oxide film defects have a serious impact on the density of the finished ingot structure. Even through the subsequent heat treatment process to optimize the cast aluminum alloy, it is difficult to improve this congenital defect. These defects directly affect the mechanical properties of the material, such as tensile properties, fatigue properties, impact and bending properties. The above defects can only be improved during smelting, and eliminated through degassing and refining processes after the aluminum alloy material is melted.

[0004] In the existing technology, Chinese invention patent CN106702174A discloses a static furnace and a SNIF online degassing device for purifying aluminum alloy melts, which only treats aluminum melts by mechanical degassing process. This method is difficult to purify trace impurities in aluminum melts.

[0005] Therefore, in order to obtain higher quality aluminum melt, it is necessary to invent an aluminum alloy melt purification process system and an aluminum melt purification process suitable for production. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a process system for purifying aluminum alloy melt and an aluminum melt purification process. The aluminum melt is purified by blowing nitrogen or other inert gases from the bottom upward in an insulation tank, a refining tank and a filtering tank, so as to solve the problem of low quality of the aluminum melt and the problem that the mechanical properties of the material do not meet the requirements due to the low quality of the aluminum melt.

[0007] To achieve the above-mentioned and other related purposes, the present invention provides, in a first aspect, a process system for purifying aluminum alloy melt, which is used to purify aluminum melt, and the purification system comprises a feeding area, a melting pool, a heat preservation pool, a refining pool, a filtering pool and a material taking pool which are connected in sequence;

[0008] The bottom or side of the thermal insulation pool, refining pool and filtering pool are all provided with one or more jetting mechanisms, and the jetting mechanisms are used to spray air into each of the pools;

[0009] The refining tank is also provided with a mechanical degassing mechanism, and a mechanical rod of the mechanical degassing mechanism is located in the refining tank.

[0010] In some embodiments of the present invention, the refining tank and the filtering tank are connected through a first channel, and the filtering tank and the material extraction tank are connected through a second channel;

[0011] Filter components are disposed in the first channel and the second channel.

[0012] In some embodiments of the present invention, the purification system includes two groups of refining tanks, filtering tanks and material extraction tanks, which are respectively arranged on both sides of the insulation tank.

[0013] In some embodiments of the present invention, the filtration tank comprises a first filtration tank and a second filtration tank;

[0014] The refining pool is connected to the first filtering pool through a first channel, the first filtering pool is connected to the second filtering pool through a third channel, and the second filtering pool is connected to the material taking pool through a second channel;

[0015] A filter assembly is arranged in each of the communication channels.

[0016] In some embodiments of the present invention, the aluminum alloy melt purification process system further includes one or more of the following technical features:

[0017] A1, the filter assembly is selected from a metal mesh, a metal alloy mesh or a ceramic mesh;

[0018] A2, the filter assembly is a filter mesh, and includes a first filter assembly, a second filter assembly and a third filter assembly;

[0019] The first filter assembly is disposed in the first channel and has a mesh size of 150 to 200;

[0020] The second filter assembly is disposed in the second channel and has a mesh size of 300 to 500;

[0021] The third filter assembly is disposed in the third channel and has a mesh size of 200 to 300;

[0022] A3. The jet mechanism includes a heat-resistant fixing part and a jet nozzle.

[0023] In some embodiments of the present invention, the aluminum alloy melt purification process system further includes one or more of the following technical features:

[0024] B1. The insulation pool, refining pool, filtration pool and material collection pool are all rectangular pools;

[0025] B2. A plurality of jet mechanisms are evenly arranged at the bottom of the insulation pool, and the jet mechanisms are arranged close to the inner wall of the insulation pool;

[0026] B3, a plurality of jet mechanisms are evenly arranged at the bottom of the refining tank and the filtering tank, and the jet mechanisms are arranged near the middle of each of the tanks;

[0027] B4. A slag removal area is provided on the outer peripheral side of the insulation pool.

[0028] A second aspect of the present invention provides an aluminum melt purification process, characterized in that it comprises the following steps:

[0029] S1. Aluminum ingot materials enter the melting pool from the loading area according to the process ratio and are melted into aluminum melt;

[0030] S2, the aluminum melt enters the insulation tank for treatment, and a refining agent is added to the insulation tank to refine the aluminum melt;

[0031] An air jet mechanism is arranged at the bottom or side of the insulation pool, and the air jet mechanism blows air to the aluminum melt in the insulation pool to remove impurities from the aluminum melt in the insulation pool;

[0032] S3. After being treated in the heat preservation pool, the aluminum melt enters the refining pool, and rare earth refiner and / or modifier alloy is added to the refining pool; and an air jet mechanism is arranged at the bottom or side of the refining pool, and a mechanical degassing mechanism is arranged at the top of the pool, and the aluminum melt is further treated by mechanical means of the mechanical degassing mechanism and air blowing of the air jet mechanism to remove impurities;

[0033] S4, after being processed in the refining tank, the aluminum melt enters the filtering tank;

[0034] An air jet mechanism is arranged at the bottom or side of the filter pool, and the air jet mechanism blows air to the aluminum melt in the filter pool to remove impurities from the aluminum melt in the filter pool;

[0035] S5. After being processed in the filter tank, the aluminum melt enters the material taking tank.

[0036] In some embodiments of the present invention, the aluminum melt purification process further includes one of the following technical features:

[0037] C1. In the step S4, the filter tank comprises a first filter tank (51) and a second filter tank (52); after the aluminum melt is processed in the refining tank (4), it enters the first filter tank (51) for processing and then enters the second filter tank (52);

[0038] C2, the jet mechanism includes a heat-resistant fixing member and a jet nozzle;

[0039] C3, the jet pressure of the jet mechanism is 0.1-0.3Mpa;

[0040] C4, the gas flow rate of the jet mechanism is 0.2~0.5m 3 / h;

[0041] C5. The mechanical degassing mechanism uses a graphite degassing rod;

[0042] C6. The rotation speed of the mechanical degassing mechanism is 35-55 rpm;

[0043] C7. In step S3, the residence time of the material in the refining tank is 8-12 min;

[0044] C8. In step S4, the residence time of the material in the filter tank is 8-12 min;

[0045] C9. In step S5, the material stays in the material taking tank for 4-6 minutes.

[0046] In some embodiments of the present invention, the aluminum melt purification process further includes:

[0047] D1, in feature C1, the refining tank (4) and the first filtering tank (51) are connected via a first channel (415), the first filtering tank and the second filtering tank are connected via a third channel (512), and the second filtering tank and the material extraction tank are connected via a second channel (516); and filtering components are respectively provided in the first channel (415), the second channel (516) and the third channel (512);

[0048] D2. In step S2, the jet pressure of the jet mechanism in the insulation pool is 0.15-0.3 MPa, and the gas flow rate is 0.4-0.5 m 3 / h;

[0049] D3. In step S3, the jet pressure of the jet mechanism in the refining pool is 0.2-0.3 MPa, and the gas flow rate is 0.3-0.4 m 3 / h;

[0050] D4, the jet pressure of the jet mechanism in the filter tank is 0.1-0.18Mpa, and the gas flow rate is 0.2-0.3m 3 / h.

[0051] In some embodiments of the present invention, in feature D1, the filter assembly is a filter mesh, and includes a first filter assembly, a second filter assembly, and a third filter assembly;

[0052] The first filter assembly is disposed in the first channel, and has a mesh size of 150 to 200;

[0053] The second filter assembly is disposed in the second channel, and has a mesh size of 300 to 500;

[0054] The third filter assembly is arranged in the third channel, and has a mesh size of 200-300.

[0055] The beneficial effects of the above implementation scheme are as follows:

[0056] 1) A new purification process system is adopted, a filtering pool is added between the refining pool and the material taking pool, the process beat is increased, and rare earth refiners and modifier alloys are added to the refining pool to fully refine and modify them in the filtering pool, thereby improving the quality of aluminum melt and thus improving the performance of the material;

[0057] 2) The refining tank, the filtering tank and the material taking tank are connected through a connecting channel, and the filtering components are filled in the connecting channel. The aluminum melt passes through each filtering component for impurity treatment;

[0058] 3) Add jet mechanisms at the bottom or side of the insulation pool, refining pool and filtration pool, and use intermittent or continuous blowing to remove impurities from the aluminum melt to improve the quality of the aluminum melt;

[0059] 4) The air nozzle of the air jet mechanism is arranged at the bottom of the refining pool and the air outlet of the mechanical graphite rod is slightly staggered to form air convection, thereby increasing the service life of the graphite rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 It is a process flow diagram of the aluminum melt purification process system of the present invention;

[0061] Figure 2 It is a partial process flow diagram of the aluminum melt purification process system described in the present invention;

[0062] Figure 3 It is the microscopic metallographic structure of the casting product of the aluminum melt purification process system in the prior art;

[0063] Figure 4 It is the microscopic metallographic structure of the casting product of the aluminum melt purification process system described in the present invention.

[0064] Numbers in the figure:

[0065] 1. Loading area;

[0066] 2. Melting pool;

[0067] 3. Insulation pool;

[0068] 31. Slag removal area;

[0069] 4. Refining pool;

[0070] 415, first channel;

[0071] 51. First filter tank; 52. Second filter tank;

[0072] 512, third channel; 516, second channel;

[0073] 6. Material taking pool;

[0074] 7. Jet mechanism;

[0075] 8. Mechanical degassing mechanism. DETAILED DESCRIPTION

[0076] Briefly describe the process steps of purifying the original aluminum alloy melt:

[0077] After the materials are prepared in the loading area according to the process ratio, they enter the melting pool to melt into aluminum melt, then enter the refining pool for refining, and finally enter the material taking pool for subsequent process steps. According to the continuous process production requirements, the general time spent in the refining pool is t1 (20 minutes), and the general time spent in the material taking pool is t2 (5 minutes).

[0078] The process cycle is t1+t2 (25min)

[0079] The purification steps of the process system for purifying the aluminum alloy melt provided by the present invention are as follows:

[0080] After the materials are prepared in the loading area according to the process proportion, they enter the melting pool to melt into aluminum melt, then enter the refining pool for refining, and finally enter the material taking pool for subsequent process steps after passing through the first filter pool and / or the second filter pool. According to the process flow requirements, the residence time in the refining pool is generally T1 (10min), the residence time in the first filter pool is T2 (10mim), the residence time in the second filter pool is T3 (10min), and the residence time in the material taking pool is T4 (5min);

[0081] The process cycle is T1+T2+T3+T4 (35min)

[0082] The process system for purifying aluminum melt is applied in industrial production lines. It works continuously and needs to match the process rhythm of the process sequence before and after. The introduction of the first filter tank and the second filter tank in the system can provide a suitable process rhythm. The rare earth refiner and modifier alloy are added to the refining tank. The rare earth alloy will form new nucleation particles in the aluminum melt. It has an incubation period and starts to react in about 20 minutes, which can fully meet the requirements of refinement and modification. In addition, a jet mechanism is added to the refining tank, the first filter tank and / or the second filter tank to spray inert gases such as nitrogen into the aluminum melt. By increasing the processing time, increasing the flow route of the aluminum melt and coordinating the spraying of the jet mechanism, non-metallic inclusions such as aluminum oxide will be removed, so that the low-density inclusions will be covered by the inert gas and float up through the processing time, thereby improving the quality of the aluminum melt.

[0083] In addition, in order to further improve the quality of aluminum melt, the present invention connects the refining tank, the filtering tank and the material taking tank through a connecting channel, and fills the connecting channel with a filtering component, and the aluminum melt passes through each filtering component to process impurities;

[0084] Preferably, the process system of the present invention comprises a refining tank, a first filter tank, a second filter tank and a material taking tank which are arranged side by side and connected in sequence; and the refining tank and the first filter tank are connected through a first channel, the first filter tank and the second filter tank are connected through a third channel, the second filter tank and the material taking tank are connected through a second channel, and a filter component is arranged in each channel.

[0085] Preferably, the filter assembly uses a ceramic filter.

[0086] It is worth noting that the function of the insulation pool in the traditional aluminum melt processing process is to fully diffuse the elements of the aluminum melt and store the aluminum melt to ensure the continuity of industrialization. The present application introduces a jet mechanism at the bottom of the insulation pool and uses a continuous blowing of inert gas to treat the aluminum melt and improve the quality of the aluminum melt.

[0087] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0088] Example 1

[0089] See also Figure 1-2 , a process system for purifying aluminum alloy melt, used for purifying aluminum melt.

[0090] As 1 and Figure 2 As shown, the purification system includes a feeding area 1, a melting pool 2, a heat preservation pool 3, a refining pool 4, a filtering pool and a material taking pool 6 which are connected in sequence. The heat preservation pool 3, the refining pool 4, the filtering pool and the material taking pool 6 are all rectangular pools, and a jet mechanism is respectively arranged at the bottom of the heat preservation pool 3 and at the four corners of the heat preservation pool, and is close to the inner wall of the heat preservation pool.

[0091] Specifically, a vent is provided at the bottom of the heat preservation pool. The jet mechanism 7 includes a heat-resistant fixing and a jet nozzle, and the jet nozzle is fixed to the vent through the heat-resistant fixing. The heat-resistant fixing is used to fix the jet nozzle and seal the vent. The jet nozzle continuously blows air into the heat preservation pool through an external pressure mechanism and a gas storage tank. The jet pressure is 0.1-0.3Mpa, and the gas flow rate is 0.2-0.5m 3 / h.

[0092] In addition, a slag removal zone is provided on the outer peripheral side of the heat preservation pool 3. The slag removal zone is provided at one end away from the melting zone. The slag removal is generally performed for 60 to 120 minutes per time.

[0093] In this embodiment, a mechanical degassing mechanism 8 is provided at the top of the refining tank. The mechanical degassing mechanism 8 uses a mechanical graphite rod mechanism in the prior art. It is briefly described as comprising a motor, a rotor shaft and a graphite rod. Electrolysis drives the rotor shaft to rotate. The graphite rod is connected to the rotor shaft. A vent is provided in the rotor shaft and is connected to the vent on the graphite rod. The aluminum melt is treated by mechanical stirring and by introducing nitrogen into the refining tank through the vent.

[0094] In a preferred embodiment, Figure 1 As shown, the purification system includes two groups of refining pools 4, a filtering pool and a material taking pool 6, which are respectively arranged on both sides of the insulation pool 3. At one end away from the melting zone, flow channels are respectively arranged on both sides of the insulation pool to input aluminum melt into the refining pool.

[0095] In a preferred embodiment, the refining tank 4 and the filtering tank are connected through the first channel 415 , and the filtering tank and the material extraction tank 6 are connected through the second channel 516 . Filter components are arranged in the first channel 415 and the second channel 516 .

[0096] In a preferred embodiment, the filter pool includes a first filter pool 51 and a second filter pool 52. The refining pool 4 and the first filter pool 51 are connected through a first channel 415, the first filter pool 51 and the second filter pool 52 are connected through a third channel 512, and the second filter pool 52 and the material extraction pool 6 are connected through a second channel 516. The first filter assembly, the second filter assembly and the third filter assembly are respectively arranged in each connecting channel, and the filter assembly has a unidirectional flow direction.

[0097] In a specific embodiment, Figure 2 As shown, the refining tank 4, the first filtering tank 51 and the second filtering tank 52 are arranged side by side, and the first channel, the third channel and the second channel are sequentially provided to connect the three tanks. To meet the process requirements, the first channel is set higher than the third channel, and the second channel is set higher than the first channel.

[0098] In a specific embodiment, the filter component is made of a high temperature resistant metal mesh, a high temperature resistant metal alloy mesh or a ceramic mesh.

[0099] In a specific embodiment, the filter assembly is a ceramic filter mesh, and the mesh number of the first filter assembly is 150-200, preferably 150 mesh. The mesh number of the second filter assembly is 300-500, preferably 300 mesh. The mesh number of the third filter assembly is 200-300, preferably 200 mesh.

[0100] In a preferred embodiment, two jet mechanisms 7 are evenly disposed at the bottom of the refining tank 4, the first filtering tank and the second filtering tank, and the jet mechanisms 7 are disposed near the middle of each tank.

[0101] In a preferred embodiment, the air nozzles of the two air-jet mechanisms in the refining pool are staggered with the air vents (air outlets) of the graphite rods, preferably staggered by 1-5 cm, to form air convection, thereby increasing the service life of the graphite rods to more than one month, which not only improves the refining effect of the aluminum melt but also saves costs.

[0102] Example 2

[0103] See also Figure 1-2 , an aluminum melt purification process, taking A356 aluminum alloy as raw material to produce cast aluminum alloy wheel hub as an example, comprises the following steps:

[0104] S1. Prepare 10 tons of A356 aluminum ingots and melt them into aluminum melt from the loading area into the melting pool;

[0105] S2. The aluminum melt enters the insulation pool for treatment. The jet mechanism is turned on to continuously introduce nitrogen into the insulation pool. The jet pressure is 0.15Mpa and the gas flow rate is 0.4m 3 / h, the duration is 10 to 20 minutes. At the same time as the jetting, 0.1 to 0.3% refining agent is also added to each ton of A356 aluminum alloy for preliminary refining and slag removal.

[0106] The actual slag removal amount is weighed based on the amount of surface slag as a standard. The appropriate amount of slag per ton of aluminum water is 5-7%, which makes the aluminum melt optimal in the insulation pool.

[0107] S3. After being treated in the insulation pool, the aluminum melt enters the refining pool, and 0.2% refining agent is added to each ton of A356 aluminum melt, and the ratio of rare earth alloy is 0.4-0.6% per ton of aluminum melt.

[0108] A commercially available mechanical graphite rod is set on the top of the refining pool, with a rotation speed of 45rpm. Two jet mechanisms are set at the bottom of the refining pool. Specifically, the heat-resistant fixings of the two jet mechanisms are fixed to the bottom of the refining pool. Two vents are set at the bottom of the refining pool. The jet nozzle of the jet pipeline passes nitrogen into the refining pool through the heat-resistant fixings and the vents. The jet pressure is 0.2Mpa and the gas flow rate is 0.4m 3 / h, and the duration is 10min. The refining pool mainly removes non-metallic inclusions such as alumina (above 200μm).

[0109] S4, the refining pool is connected to the first filter pool through the first channel, and a ceramic filter screen with a mesh size of 150 is installed in the first channel. Two jet mechanisms are provided at the bottom of the first filter pool, and nitrogen is introduced into the refining pool through the jet mechanism. The jet pressure is 0.18Mpa and the gas flow rate is 0.3m 3 / h, duration is 10min;

[0110] The first filter pool is connected to the second filter pool through the third channel. A ceramic filter screen with a mesh size of 300 is installed in the third channel. Two jet mechanisms are provided at the bottom of the second filter pool. Nitrogen is introduced into the refining pool through the jet mechanism. The jet pressure is 0.18Mpa and the gas flow rate is 0.3m 3 / h, duration is 10min; the filter tank mainly removes non-metallic inclusions such as alumina (100-200μm).

[0111] S5, after being processed in two-step filtration tanks, the aluminum melt enters the material taking tank for 5 minutes;

[0112] The material taking pool is connected with the second filtering pool through a second channel, and a ceramic filter screen with a mesh size of 500 is installed in the second channel.

[0113] Comparative Example 1

[0114] Using the original process system (same materials as in Example 1)

[0115] S10, the aluminum ingot material enters the melting pool from the loading area to be melted into aluminum melt;

[0116] S20: The aluminum melt enters the insulation tank for treatment.

[0117] S30. After being treated in the insulation pool, the aluminum melt enters the refining pool and is added with refining agent for 20-30 minutes.

[0118] A commercially available mechanical graphite rod was set on the top of the refining tank, with a rotation speed of 45 rpm.

[0119] S40, after being treated in the refining pool, the aluminum melt enters the feeding pool for 5 minutes.

[0120] Example 3

[0121] The cast aluminum alloy wheel hub prepared by the aluminum melt obtained by the process method of Example 2 is counted as Product E. The qualified rate of Product E is measured by the FTQ value. The FTQ of the improved process system is 96%.

[0122] The cast aluminum alloy wheel hub prepared by the aluminum melt obtained by the process method of Comparative Example 1 is counted as Product F, and the qualified rate FTQ of Product F is 80%.

[0123] From the above, it can be seen that the qualified rate of products prepared from the aluminum melt obtained by adopting the process system and process method of the present application is improved.

[0124] Example 4

[0125] By adopting the process method of Example 2, the metallographic impurities at the same position of the cast aluminum alloy wheel hub product E were counted continuously for one week, and the average number of metallographic impurities within a unit circular area was 5.

[0126] By adopting the process method of comparative example 1, the metallographic impurities at the same position of the cast aluminum alloy wheel hub product F were counted continuously for one week, and the average number of metallographic impurities within the unit circular area was 25.

[0127] like Figure 3 The figure shows the metallographic structure of product F prepared by the process method of comparative example 1, and black inclusion points are shown in the figure. Figure 4 The figure shows the metallographic inclusion-free point of product E prepared by the process method of Example 2.

[0128] Example 5

[0129] The mechanical properties of product E and product F were tested, and the test rods were stretched. The test results are as follows:

[0130] The first batch of products F1 were tested four times, with the tensile strengths being 183Mpa, 182.15Mpa, 189.37Mpa, and 160Mpa respectively; the yield strengths being 96Mpa, 92Mpa, 91Mpa, and 94Mpa respectively; and the elongations being 8%, 5%, 15%, and 10% respectively.

[0131] The second batch of products F2 have tensile strengths of 178.85Mpa, 193.93Mpa, 182Mpa, and 158Mpa respectively; yield strengths of 90Mpa, 91Mpa, 82Mpa, and 91Mpa respectively; and elongations of 12.5%, 10%, 14.92%, and 13% respectively.

[0132] The third batch of products F3 have tensile strengths of 195.08Mpa, 168Mpa, 193.15Mpa, and 166Mpa respectively; yield strengths of 93Mpa, 103Mpa, 92Mpa, and 90Mpa respectively; and elongations of 15%, 6%, 15%, and 5% respectively.

[0133] The fourth batch of products F4 have tensile strengths of 184.74Mpa, 178Mpa, 183.57Mpa, and 170Mpa respectively; yield strengths of 92Mpa, 92Mpa, 91Mpa, and 92Mpa respectively; and elongations of 13.17%, 8%, 10%, and 13% respectively.

[0134] The first batch of products E1 were tested four times, with the tensile strengths being 204.47Mpa, 200.87Mpa, 201Mpa, and 203Mpa respectively; the yield strengths being 92Mpa, 92Mpa, 96Mpa, and 93Mpa respectively; and the elongations being 26.5%, 27.5%, 27.2%, and 27.25% respectively.

[0135] The second batch of products E2 were tested four times, with the tensile strengths being 206.39Mpa, 200Mpa, 202.86Mpa, and 202Mpa respectively; the yield strengths being 95Mpa, 94Mpa, 93Mpa, and 97Mpa respectively; and the elongations being 27.23%, 27.8%, 27.89%, and 27.6% respectively.

[0136] The third batch of products E3 were tested four times, with the tensile strengths being 203Mpa, 203Mpa, 204Mpa, and 205.14Mpa respectively; the yield strengths being 97Mpa, 96Mpa, 97Mpa, and 96Mpa respectively; and the elongations being 27.5%, 27.66%, 28%, and 27.56% respectively.

[0137] The fourth batch of products E4 were tested four times, with the tensile strengths being 203.36Mpa, 202.05Mpa, 200.52Mpa, and 197.91Mpa respectively; the yield strengths being 96Mpa, 94Mpa, 96Mpa, and 92Mpa respectively; and the elongations being 27.64%, 27.66%, 27.63%, and 27.53% respectively.

[0138] Through the process system and process method of the present application, the tensile strength and yield strength of the prepared product E are improved, and its elongation is greatly improved.

[0139] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0140] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A purification process system for aluminum alloy melt, used for purifying aluminum melt, the purification process system comprising a feeding area (1), a melting pool (2), a heat preservation pool (3), a refining pool (4), a filtering pool and a material taking pool (6) which are connected in sequence; The bottom or side of the thermal insulation pool (3), the refining pool (4) and the filtering pool are each provided with one or more jet mechanisms (7), and the jet mechanisms (7) are used to spray air into each of the pools; The refining tank (4) is also provided with a mechanical degassing mechanism (8), and a mechanical rod of the mechanical degassing mechanism (8) is located in the refining tank; The purification process system comprises two groups of refining tanks (4), a filtering tank and a material taking tank (6), which are respectively arranged on both sides of the insulation tank (3); The filtering pool comprises a first filtering pool (51) and a second filtering pool (52); The refining pool (4) and the first filtering pool (51) are connected via a first channel (415), the first filtering pool (51) and the second filtering pool (52) are connected via a third channel (512), and the second filtering pool (52) and the material extraction pool (6) are connected via a second channel (516); Filter components are respectively arranged in the first channel (415), the second channel (516) and the third channel (512), and the filter components include a first filter component, a second filter component and a third filter component, the first filter component is arranged in the first channel (415), the second filter component is arranged in the second channel (516), and the third filter component is arranged in the third channel (512).

2. The aluminum alloy melt purification process system according to claim 1, characterized in that: It also includes one or more of the following technical features A1 to A3: A1, the filter assembly is selected from a metal mesh or a ceramic mesh; A2, the mesh number of the first filter component is 150-200; The mesh number of the second filter component is 300-500; The mesh number of the third filter component is 200-300; A3. The jet mechanism includes a heat-resistant fixing part and a jet nozzle.

3. The aluminum alloy melt purification process system according to claim 1, characterized in that: It also includes one or more of the following technical features B1 to B4: B1, the insulation pool (3), refining pool (4), filtering pool and material taking pool (6) are all rectangular pools; B2. A plurality of jet mechanisms (7) are evenly arranged at the bottom of the heat preservation pool (3), and the jet mechanisms are arranged close to the inner wall of the heat preservation pool (3); B3, a plurality of jet mechanisms (7) are evenly arranged at the bottom of the refining tank (4) and the filtering tank, and the jet mechanisms (7) are arranged near the middle of the bottom of each tank; B4. A slag removal area (31) is provided on the outer peripheral side of the heat preservation pool (3).

4. A process for purifying aluminum alloy melt, characterized in that: The steps include: S1, aluminum ingot materials enter the melting pool (2) from the loading area (1) according to the process ratio and are melted into aluminum melt; S2, the aluminum melt enters the insulation pool (3) for treatment, and a refining agent is added to the insulation pool (3) to refine the aluminum melt; An air jet mechanism (7) is arranged at the bottom or side of the heat preservation pool (3), and the air jet mechanism (7) blows air to the aluminum melt in the heat preservation pool (3) to remove impurities from the aluminum melt in the heat preservation pool (3); S3, after being treated in the heat preservation pool (3), the aluminum melt enters the refining pool (4), and rare earth refiner and / or modifier alloy is added to the refining pool (4); Furthermore, a jet mechanism (7) is arranged at the bottom or side of the refining pool (4), and a mechanical degassing mechanism (8) is arranged at the top of the pool, and the aluminum melt is further treated by mechanical means of the mechanical degassing mechanism (8) and air blowing of the jet mechanism (7); the residence time of the material in the refining pool is 8-12 minutes; S4, after being processed in the refining tank (4), the aluminum melt enters the filtering tank; An air jet mechanism (7) is arranged at the bottom or side of the filter tank, and the air jet mechanism (7) blows air to the aluminum melt in the filter tank to remove impurities from the aluminum melt in the filter tank; the filter tank comprises a first filter tank (51) and a second filter tank (52); after the aluminum melt is processed in the refining tank (4), it enters the first filter tank (51) for processing and then enters the second filter tank (52); the residence time of the material in the filter tank is 8-12 minutes; S5. After being processed in the filter tank, the aluminum melt enters the material taking tank (6). The material stays in the material taking tank for 4-6 minutes. The jet pressure of the jet mechanism is 0.1~0.3Mpa; the gas flow rate of the jet mechanism is 0.2~0.5m 3 / h.

5. The aluminum alloy melt purification process according to claim 4, characterized in that: It also includes one of the following technical features C1 to C3: C1. The jet mechanism includes a heat-resistant fixing member and a jet nozzle; C2. The mechanical degassing mechanism uses a graphite degassing rod; C3. The rotation speed of the mechanical degassing mechanism is 35-55rpm.

6. The aluminum alloy melt purification process according to claim 5, characterized in that: It also includes one or more of the following technical features D1 to D4; D1. In step S4, the refining pool (4) and the first filter pool (51) are connected via a first channel (415), the first filter pool and the second filter pool are connected via a third channel (512), and the second filter pool and the material extraction pool are connected via a second channel (516); filter components are respectively arranged in the first channel (415), the second channel (516) and the third channel (512), and the filter components include a first filter component, a second filter component and a third filter component, the first filter component is arranged in the first channel (415), the second filter component is arranged in the second channel (516), and the third filter component is arranged in the third channel (512); D2. In step S2, the jet pressure of the jet mechanism in the insulation pool is 0.15~0.3Mpa, and the gas flow rate is 0.4~0.5m 3 / h; D3. In step S3, the jet pressure of the jet mechanism in the refining pool is 0.2-0.3 MPa, and the gas flow rate is 0.3-0.4 m 3 / h; D4, the jet pressure of the jet mechanism in the filter tank is 0.1~0.18Mpa, and the gas flow rate is 0.2~0.3m 3 / h.

7. The aluminum alloy melt purification process according to claim 6, characterized in that: In feature D1, the filter assembly is a filter mesh; The mesh number of the first filter component is 150-200; The mesh number of the second filter component is 300-500; The mesh number of the third filter component is 200-300.

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