CN113186408A - Preparation method of aluminum alloy ingot - Google Patents
Preparation method of aluminum alloy ingot Download PDFInfo
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- CN113186408A CN113186408A CN202110749820.0A CN202110749820A CN113186408A CN 113186408 A CN113186408 A CN 113186408A CN 202110749820 A CN202110749820 A CN 202110749820A CN 113186408 A CN113186408 A CN 113186408A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B21/00—Obtaining aluminium
- C22B21/06—Obtaining aluminium refining
- C22B21/066—Treatment of circulating aluminium, e.g. by filtration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
- B22D7/005—Casting ingots, e.g. from ferrous metals from non-ferrous metals
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/05—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention provides a preparation method of an aluminum alloy ingot, which comprises the following steps of S100, loading raw materials for manufacturing the aluminum alloy ingot into smelting equipment, and smelting the raw materials into molten aluminum; s200, charging the aluminum liquid into a standing furnace for refining; s300, placing the refined aluminum liquid into a degassing device for degassing; s400, filtering the aluminum liquid degassed by the degassing device; s500, casting the molten aluminum into an aluminum alloy ingot; in step S200, refining is performed by introducing argon into a plurality of air bricks in the furnace, and in step S300, degassing is performed by introducing argon into a double-stage rotor. The invention can reduce the hydrogen content in the aluminum alloy ingot and the slag content larger than 20 mu m, reduce the micro-loose size of the aluminum alloy ingot, and further improve the quality of the aluminum alloy ingot.
Description
Technical Field
The invention relates to the technical field of aluminum alloy manufacturing, in particular to a preparation method of an aluminum alloy ingot.
Background
Aluminum alloys have a series of advantages of high specific strength, good comprehensive performance, easy processing, low cost and the like, and have long been the main structural materials of airplane bodies, and the aluminum alloy materials for aviation mainly comprise 2 xxx series (Al-Zn-Mg series) and 7 xxx series (Al-Zn-Mg-C mu series) aluminum alloys. With the increasing size and strong weight reduction requirements of airplanes, the overall manufacturing requirements of structural components are continuously increased, the specifications of semi-finished products such as aviation aluminum alloy plates or forgings and the like are continuously increased, and the requirements on the quality of products are higher and higher.
In the manufacturing of the aluminum alloy ingot, hydrogen is carried out in a melt according to three continuous processes of adsorption-diffusion-dissolution, the hydrogen absorption of the melt is serious, slag and gas coexist due to slag inclusion caused by melt oxidation, and the hydrogen content and the slag content of the melt become the most main factors for restricting and influencing the metallurgical quality of the ingot. When large-size aluminum alloy ingots are prepared by the prior art, the hydrogen content in a melt cannot be effectively controlled, so that the metallurgical quality of the aluminum alloy ingots cannot be guaranteed.
Disclosure of Invention
The invention aims to provide a preparation method of an aluminum alloy ingot, which can effectively control the hydrogen content in a melt, and further improve the manufacturing quality of the aluminum alloy ingot.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a preparation method of an aluminum alloy ingot comprises the following steps:
s100, putting raw materials for manufacturing the aluminum alloy ingot into smelting equipment, and smelting the raw materials into molten aluminum;
s200, putting the aluminum liquid into a standing furnace for refining;
s300, placing the refined aluminum liquid into a degassing device for degassing;
s400, filtering the aluminum liquid subjected to degassing by the degassing device;
s500, casting the aluminum liquid treated in the step S400 into the aluminum alloy ingot;
in step S200, refining is performed by introducing argon into a plurality of air bricks in the furnace, and in step S300, degassing is performed by introducing argon into a double-stage rotor.
Preferably, in step S200, the refining temperature is controlled to be 720-760 ℃, and the refining time is controlled to be 20-40 min.
Preferably, in step S200, the purity of the introduced argon is greater than or equal to 99.99%, and the flow rate of the argon is controlled to be 0.1m3/h～1.5m3The argon pressure is controlled to be 0.05MPa to 0.8 MPa.
Preferably, in step S300, the purity of the introduced argon is greater than or equal to 99.99%, the pressure of the argon is controlled to be 0.2MPa to 1.8MPa, and the degassing temperature is controlled to be 720 ℃ to 750 ℃.
Preferably, the degassing device is provided with a melt inlet and a melt outlet, the molten aluminum can enter the degassing device through the melt inlet for degassing and then flows out through the melt outlet, and the double-stage rotor comprises a first rotor close to the melt inlet and a second rotor close to the melt outlet;
in step S300, the rotation speed of the first rotor is controlled to 200rpm to 1000rpm, and the flow rate of argon gas passing through the first rotor is controlled to 1.0m3/h～7.0m3/h；
The rotation speed of the second rotor is controlled to be 100rpm to 500rpm, and the flow rate of argon gas passing through the second rotor is controlled to be 1.0m3/h～5.0m3/h。
Preferably, in step S100, the melting temperature of the melting facility is controlled to 700 ℃ to 780 ℃.
Preferably, step S100 includes:
a slagging-off step of slagging-off the aluminum liquid by a slagging-off vehicle after the raw materials for manufacturing the aluminum alloy cast ingot are melted into the aluminum liquid;
wherein the slag skimming time is less than 45 min.
Preferably, step S100 includes:
and a component adjusting step, sampling and analyzing the aluminum liquid, and adjusting the components of the aluminum liquid according to an analysis result.
Preferably, in step S400, the aluminum liquid processed in step S300 is sequentially filtered by the first filter plate and the second filter plate, respectively;
the first filter with the second filter is the ceramic filter.
Preferably, the first filter plate has a porosity of 30+50PPI and a thickness of 50mm to 60 mm;
and/or the porosity of the second filter plate is 30+50PPI, and the thickness is 50 mm-60 mm.
According to the preparation method of the aluminum alloy ingot, the technical scheme that in the step S200, refining is performed in a mode that argon is introduced into a plurality of air bricks in the furnace, and in the step S300, degassing is performed in a mode that argon is introduced into a two-stage rotor is adopted, so that the content of hydrogen in a melt can be effectively controlled, and the manufacturing quality of the aluminum alloy ingot is improved.
Drawings
FIG. 1 is a flow chart of a method for producing an aluminum alloy ingot according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the method for preparing the aluminum alloy ingot of the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, a method for producing an aluminum alloy ingot includes the steps of:
s100, putting raw materials for manufacturing aluminum alloy ingots into smelting equipment, and smelting the raw materials into molten aluminum;
s200, charging the aluminum liquid into a standing furnace for refining;
s300, placing the refined aluminum liquid into a degassing device for degassing;
s400, filtering the aluminum liquid degassed by the degassing device;
s500, casting the molten aluminum into an aluminum alloy ingot;
in step S200, refining is performed by introducing argon into a plurality of air bricks in the furnace, and in step S300, degassing is performed by introducing argon into a double-stage rotor.
And S200, refining in the standing furnace by using the air brick, wherein the air brick has a self-stirring effect, so that the components and the temperature of the melt are more uniform, the static pressure of the melt in the furnace can be overcome by controlling the purity and the flow of argon, the hydrogen in the melt is released into the atmosphere, the hydrogen content in the melt is effectively reduced, and the manufacturing quality of the aluminum alloy ingot can be improved.
Specifically, in step S200, the refining temperature is controlled to be 720-760 ℃, and the refining time is controlled to be 20-40 min. More preferably, in step S200, the purity of the introduced argon gas is greater than or equal to 99.99%, and the flow rate of the argon gas is controlled to be 0.1m3/h～1.5m3The argon pressure is controlled to be 0.05MPa to 0.8 MPa.
As an embodiment, in step S300, the purity of argon gas is greater than or equal to 99.99%, the pressure of argon gas is controlled to be 0.2MPa to 1.8MPa, and the degassing temperature is controlled to be 720 ℃ to 750 ℃.
Furthermore, the degassing device is provided with a melt inlet and a melt outlet, molten aluminum can enter the degassing device through the melt inlet for degassing and then flows out through the melt outlet, and the two-stage rotor comprises a first rotor close to the melt inlet and a second rotor close to the melt outlet;
in step S300, the rotation speed of the first rotor is controlled to 200rpm to 1000rpm, and the flow rate of argon gas passing through the first rotor is controlled to 1.0m3/h～7.0m3/h；
The rotation speed of the second rotor was controlled to 100rpm to 500rpm, and the flow rate of argon gas passing through the second rotor was controlled to 1.0m3/h～5.0m3/h。
Therefore, the rotor can be controlled to stir to form micro dispersed bubbles by controlling the argon flow and pressure at the inlet side and the outlet side of the melt, so that hydrogen and slag in the molten aluminum are adsorbed in the bubble floating process, the melt purification effect is achieved, and the hydrogen content in the melt is reduced.
As an embodiment, in step S100, the melting temperature of the melting facility is controlled to 700 to 780 ℃.
Preferably, step S100 includes:
and a slagging-off step, namely after raw materials for manufacturing the aluminum alloy cast ingot are melted into molten aluminum, slagging-off operation is carried out on the molten aluminum through a slagging-off vehicle. Wherein the slag skimming time is less than 45 min.
More preferably, step S100 includes:
and a component adjusting step, sampling and analyzing the aluminum liquid, and adjusting the components of the aluminum liquid according to an analysis result. It should be noted that the smelting time of the molten aluminum cannot exceed 12 h. In the component adjusting step, the aluminum liquid is sampled and analyzed, and the components of the aluminum liquid are adjusted according to the analysis result, which is not the invention point but the prior art.
As an implementation manner, in step S400, the aluminum liquid is sequentially filtered by the first filter plate and the second filter plate, respectively. Wherein the first filter plate and the second filter plate are both ceramic filter plates. And the first filter plate has a porosity of 30+50PPI and a thickness of 50mm to 60mm, and/or the second filter plate has a porosity of 30+50PPI and a thickness of 50mm to 60 mm. Therefore, solid inclusions in the melt can be mechanically separated through the deposition effect, the hydrodynamic effect and the direct interception effect, slag inclusions larger than or equal to 20 microns in the melt can be effectively removed, the amount of impurities in the melt is controlled, and the quality of the aluminum alloy cast ingot is further improved. In step S400, the filtering manner of the aluminum liquid is not limited to the following, and other filtering manners capable of achieving the purpose of the invention may be adopted.
In order to verify the effect of the invention, the inventor respectively adopts the preparation method of the aluminum alloy ingot to prepare the following aluminum alloy ingots:
7050 aluminum alloy large-size ingot
In step S100, raw materials such as refined aluminum ingots, zinc ingots, magnesium ingots, Al-C mu intermediate alloys, Al-Zr intermediate alloys and the like are weighed according to the proportion of alloy elements and are loaded into a smelting device for smelting, the smelting speed is increased in the process of smelting by adopting modes such as electromagnetic stirring and the like, the smelting temperature is controlled to be 720-760 ℃, a slagging-off vehicle is adopted for slagging-off operation after molten aluminum is melted, the slagging-off time is 40min, sampling is carried out after slagging-off for component analysis, alloy components are adjusted according to the component analysis result, so that the components of the alloy meet the requirements, and the smelting time is 8 h.
In step S200, the completely melted aluminum liquid is transferred to a standing furnace for refining in the standing furnace, the temperature of the standing furnace is controlled to be 730-750 ℃, the refining is carried out by introducing argon into a plurality of air bricks in the furnace, the purity of the argon is not lower than 99.999 percent, and the flow of the argon is controlled to be 0.8m3H, argon pressure of 0.4MPa, and refining time of 30 min.
In step S300, the aluminum liquid is transferred to an online degassing device for online degassing, the temperature is controlled to be 720-750 ℃, online degassing is carried out in a mode of introducing argon through a double-stage rotor, the purity of the argon is not lower than 99.999%, and the pressure of the argon is controlled to be 1.6 MPa. The speed of the first rotor in the two-stage rotor near the inlet side of the melt was controlled at 700rpm, and the argon flow was controlled at 6.0m3H is used as the reference value. The speed of the second rotor was controlled at 300rpm near the melt outlet side and the argon flow was controlled at 4.0m3/h。
In step S400, after online degassing, filtering and deslagging the molten aluminum by using a ceramic filter plate type filter device, wherein a two-stage ceramic filter plate is used for deslagging, the porosity of the two-stage ceramic filter plate is 30+50PPI, the thickness of the filter plate is 50mm, and online hydrogen measurement and slag measurement are carried out;
in step S500, proper casting process parameters are selected, a 7050 aluminum alloy large-size ingot is manufactured and molded, and then the micro-porosity size of the ingot is detected.
After the production is finished, the 7050 aluminum alloy large-size cast ingot is detected, the hydrogen content of the cast ingot is 0.05 mu g/g-0.08 mu g/g, the slag content of more than 20 mu m is 17904 mu g/kg, and the micro-porosity size is less than 20 mu m.
The large-size 7050 aluminum alloy cast ingot manufactured by the prior art is detected, the hydrogen content is 0.20-0.25 mu g/g, the slag content larger than 20 mu m is 230483/kg, and the micro-porosity size is less than 120 mu m.
Large-size secondary and 2124 aluminum alloy cast ingot
In step S100, raw materials such as refined aluminum ingots, magnesium ingots and Al-C mu intermediate alloys are weighed according to the proportion of alloy elements and are charged into a furnace for smelting, the smelting speed is accelerated in the smelting process by adopting the modes of electromagnetic stirring and the like, the smelting temperature is controlled to be 730-770 ℃, a slagging-off vehicle is adopted for slagging-off operation after the melting is finished, the slagging-off time is 45min, sampling is carried out after slagging-off for component analysis, the alloy components are adjusted according to the component analysis result so that the components of the alloy meet the requirements, and the smelting time is 12 h.
In step S200, the completely melted aluminum liquid is transferred to a standing furnace for refining in the standing furnace, the temperature of the standing furnace is controlled to be 740-760 ℃, the refining is carried out by introducing argon into a plurality of air bricks in the furnace, the purity of the argon is not lower than 99.999 percent, and the flow of the argon is controlled to be 0.1m3H, argon pressure of 0.8MPa and refining time of 40 min.
In step S300, transferring the aluminum liquid to an online degassing device for online degassing, controlling the temperature to be 720-750 ℃, performing online degassing in a way of introducing argon into a double-stage rotor, controlling the purity of the argon to be not less than 99.999 percent and the pressure of the argon to be 1.2MPa, controlling the speed of a first rotor close to the inlet side of a melt in the double-stage rotor to be 1000rpm, and controlling the flow of the argon to be 1.0m3H, the speed of the second rotor near the melt outlet side was controlled at 500rpm, and the flow rate of argon was controlled at 5.0m3/h；
In the step S400, a ceramic filter plate type filtering device is adopted to filter and remove slag from the molten aluminum, a two-stage ceramic filter plate is adopted for removing the slag, the porosity of the two-stage ceramic filter plate is 30+50PPI, and the thickness of the filter plate is 55 mm; and measuring hydrogen and slag on line.
In step S500, proper casting process parameters are selected, a large-size 2124 aluminum alloy ingot is manufactured and molded, and then the micro-porosity size of the ingot is detected.
After the manufacturing is finished, the large-size 2124 aluminum alloy cast ingot is detected, the hydrogen content of the cast ingot is 0.03-0.06 mu g/g, the slag content larger than 20 mu m is 16725/kg, and the micro-porosity size is smaller than 10 mu m.
The large-size 2124 aluminum alloy ingot manufactured by the prior art is detected, the hydrogen content is 0.18-0.20 mu g/g, the slag content larger than 20 mu m is 197821 slag/kg, and the micro-porosity size is smaller than 100 mu m.
Three, 7A85 aluminum alloy large-size cast ingot
In step S100, raw materials such as refined aluminum ingots, zinc ingots, magnesium ingots, Al-C mu intermediate alloys, Al-Zr intermediate alloys and the like are weighed according to the proportion of alloy elements, the raw materials are charged into a furnace for smelting, the smelting speed is accelerated in the smelting process by adopting modes such as electromagnetic stirring and the like, the smelting temperature is controlled to be 700-760 ℃, a slagging-off vehicle is adopted for slagging-off operation after molten aluminum liquid is melted, the slagging-off time is 45min, the samples are taken after slagging-off for component analysis, the alloy components are adjusted according to the component analysis results, so that the components of the alloy meet the requirements, and the smelting time is 9 h.
In step S200, the completely melted aluminum liquid is transferred to a standing furnace for refining in the standing furnace, the temperature of the standing furnace is controlled to be 720-740 ℃, refining is carried out by introducing argon into a plurality of air bricks in the furnace, the purity of the argon is not lower than 99.999 percent, and the flow of the argon is controlled to be 1.5m3H, argon pressure of 0.05MPa and refining time of 35 min.
In step S300, transferring the aluminum liquid to an online degassing device for online degassing, controlling the temperature to be between 720 and 740 ℃, performing online degassing in a mode of introducing argon into a double-stage rotor, controlling the purity of the argon to be not less than 99.999 percent and the pressure of the argon to be 1.2MPa, controlling the speed of a first rotor close to the inlet side of a melt in the double-stage rotor to be 600rpm, and controlling the flow of the argon to be 4.0m3H, the speed of the second rotor near the melt outlet side was controlled at 200rpm, and the argon flow was controlled at 2.0m3/h。
In the step S400, filtering and deslagging are carried out on the molten aluminum by adopting a ceramic filter plate type filtering device, wherein a two-stage ceramic filter plate is adopted for deslagging, the porosity of the two-stage filter plate is 30+50PPI, and the thickness of the filter plate is 55 mm; and measuring hydrogen and slag on line.
In step S500, proper casting process parameters are selected, a 7A85 aluminum alloy large-size cast ingot is manufactured and molded, and then the micro-porosity size of the cast ingot is detected.
After the manufacturing is finished, the large-size 7A85 aluminum alloy ingot is detected, the hydrogen content of the ingot is 0.06-0.10 mu g/g, the slag content larger than 20 mu m is 16402/kg, and the micro-porosity size is smaller than 18 mu m.
And the large-size 7A85 aluminum alloy cast ingot manufactured by the prior art is detected, the hydrogen content is 0.23-0.28 mug/g, the slag content larger than 20 μm is 194296/kg, and the micro-porosity size is smaller than 95 μm.
Four, 7B50 aluminum alloy large-size cast ingot
In step S100, raw materials such as refined aluminum ingots, zinc ingots, magnesium ingots, Al-C mu intermediate alloys, Al-Zr intermediate alloys and the like are weighed according to the proportion of alloy elements, the raw materials are charged into a furnace for smelting, the smelting speed is accelerated in the smelting process by adopting modes such as electromagnetic stirring and the like, the smelting temperature is controlled to be 720-780 ℃, a slagging-off vehicle is adopted for slagging-off operation after molten aluminum liquid, the slagging-off time is 45min, sampling is carried out after slagging-off for component analysis, the alloy components are adjusted according to the component analysis result, so that the components of the alloy meet the requirements, and the smelting time is 9 h.
In step S200, the completely melted aluminum liquid is transferred to a standing furnace for refining in the standing furnace, the temperature of the standing furnace is controlled to be 720-750 ℃, the refining is carried out by introducing argon into a plurality of air bricks in the furnace, the purity of the argon is not lower than 99.999 percent, and the flow of the argon is controlled to be 1.2m3H, argon pressure of 0.4MPa and refining time of 35 min.
In step S300, transferring the aluminum liquid to an online degassing device for online degassing, controlling the temperature to be 720-750 ℃, performing online degassing in a way of introducing argon into a double-stage rotor, controlling the purity of the argon to be not less than 99.999 percent and the pressure of the argon to be 0.4MPa, controlling the speed of a first rotor close to the inlet side of a melt in the double-stage rotor to be 400rpm, and controlling the flow of the argon to be 7.0m3H, the speed of the second rotor near the melt outlet side was controlled at 100rpm, and the argon flow was controlled at 1.5m3/h。
In step S400, a ceramic filter plate type filtering device is adopted for melt filtration and slag removal, a two-stage ceramic filter plate is adopted for slag removal, the porosity of the two-stage filter plate is 30+60PPI, and the thickness of the filter plate is 60 mm; and measuring hydrogen and slag on line.
In step S500, proper casting process parameters are selected, a 7B50 aluminum alloy large-size cast ingot is manufactured and molded, and then the micro-porosity size of the cast ingot is detected.
After the manufacturing is finished, the large-size 7B50 aluminum alloy ingot is detected, the hydrogen content of the ingot is 0.05 mu g/g-0.10 mu g/g, the slag content of more than 20 mu m is 17930 pieces/kg, and the micro-porosity size is less than 15 mu m.
And the large-size 7B50 aluminum alloy cast ingot manufactured by the prior art is detected, the hydrogen content is 0.24-0.29 mu g/g, the slag content larger than 20 mu m is 289042/kg, and the micro-porosity size is less than 150 mu m.
The embodiment of the invention has the advantages that the hydrogen content in the aluminum alloy ingot and the slag content larger than 20 mu m can be reduced, the micro-porosity size of the aluminum alloy ingot is reduced, and the quality of the aluminum alloy ingot is improved.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A preparation method of an aluminum alloy ingot is characterized by comprising the following steps:
the method comprises the following steps:
s100, putting raw materials for manufacturing the aluminum alloy ingot into smelting equipment, and smelting the raw materials into molten aluminum;
s200, putting the aluminum liquid into a standing furnace for refining;
s300, placing the refined aluminum liquid into a degassing device for degassing;
s400, filtering the aluminum liquid subjected to degassing by the degassing device;
s500, casting the aluminum liquid treated in the step S400 into the aluminum alloy ingot;
in step S200, refining is performed by introducing argon into a plurality of air bricks in the furnace, and in step S300, degassing is performed by introducing argon into a double-stage rotor.
2. The method of producing an aluminum alloy ingot according to claim 1, characterized in that:
in step S200, the refining temperature is controlled to be 720-760 ℃, and the refining time is controlled to be 20-40 min.
3. The method of producing an aluminum alloy ingot according to claim 2, characterized in that:
in step S200, argon is introduced with a purity of 99.99% or more and an argon flow rate of 0.1m3/h～1.5m3The argon pressure is controlled to be 0.05MPa to 0.8 MPa.
4. The method of producing an aluminum alloy ingot according to claim 1, characterized in that:
in step S300, the purity of the introduced argon is greater than or equal to 99.99 percent, the argon pressure is controlled to be 0.2MPa to 1.8MPa, and the degassing temperature is controlled to be 720 ℃ to 750 ℃.
5. The method of producing an aluminum alloy ingot according to claim 4, wherein:
the degassing device is provided with a melt inlet and a melt outlet, the molten aluminum can enter the degassing device through the melt inlet for degassing and then flows out through the melt outlet, and the double-stage rotor comprises a first rotor close to the melt inlet and a second rotor close to the melt outlet;
in step S300, the rotation speed of the first rotor is controlled to 200rpm to 1000rpm, and the flow rate of argon gas passing through the first rotor is controlled to 1.0m3/h～7.0m3/h；
The rotation speed of the second rotor is controlled to be 100rpm to 500rpm, and the flow rate of argon gas passing through the second rotor is controlled to be 1.0m3/h～5.0m3/h。
6. The method of producing an aluminum alloy ingot according to any one of claims 1 to 5, wherein:
in step S100, the melting temperature of the melting facility is controlled to 700 ℃ to 780 ℃.
7. The method of producing an aluminum alloy ingot according to claim 6, wherein:
the step S100 includes:
a slagging-off step of slagging-off the aluminum liquid by a slagging-off vehicle after the raw materials for manufacturing the aluminum alloy cast ingot are melted into the aluminum liquid;
wherein the slag skimming time is less than 45 min.
8. The method of producing an aluminum alloy ingot according to claim 7, wherein:
the step S100 includes:
and a component adjusting step, sampling and analyzing the aluminum liquid, and adjusting the components of the aluminum liquid according to an analysis result.
9. The method of producing an aluminum alloy ingot according to any one of claims 1 to 5, wherein:
in step S400, the aluminum liquid processed in step S300 is sequentially filtered through a first filter plate and a second filter plate respectively;
the first filter with the second filter is the ceramic filter.
10. The method of producing an aluminum alloy ingot according to claim 9, wherein:
the porosity of the first filter plate is 30+50PPI, and the thickness of the first filter plate is 50 mm-60 mm;
and/or the porosity of the second filter plate is 30+50PPI, and the thickness is 50 mm-60 mm.
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