Method for removing nonmetal impurities and hydrogen from aluminum melt

Abstract

The invention relates to the field of aluminum alloy casting, in particular to a method for removing non-metallic impurities and hydrogen of an aluminum melt, which comprises the following steps: synchronously conveying inert gas into a furnace body based on dynamic characteristics of injection of the aluminum melt into the furnace body, and adjusting the conveying state of the inert gas based on pressure change data in the furnace body, so that the aluminum melt is in full contact with the inert gas; centrifugal acting force is applied to the furnace body, so that the furnace body rotates, visual identification is conducted on the interior of the furnace body, the generation characteristics of a mixture formed by fusion of inert gas in the aluminum melt, non-metal impurities and hydrogen are obtained, quantitative characterization is conducted on the generation speed of the mixture, and therefore the action state of the rotating action is adjusted; the mixture is in a saturated state in the aluminum melt; and based on the distribution position of the mixture in the aluminum melt, mixture separation treatment is conducted, the aluminum melt is evenly cooled, the combination efficiency of inert gas and harmful substances is improved, and the removal time of the harmful substances in the aluminum melt is shortened.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum alloy casting, and in particular to a method for removing non-metallic impurities and hydrogen from aluminum melt. Background Art

[0002] In the production of aluminum alloy casting, there are solid non-metallic impurities and harmful substances such as hydrogen inside the refined aluminum melt. These harmful substances will cause structural defects such as pores and cracks to form inside the aluminum melt during the solidification process. The greater the content of harmful substances, the greater the number and distribution range of the formed structures, which directly reduces the mechanical properties and quality of aluminum alloy castings. In order to ensure the yield rate of aluminum alloy casting production, it is necessary to remove non-metallic impurities and harmful substances such as hydrogen inside the aluminum melt. The existing technology mainly uses an inert gas fusion method to remove harmful substances, that is, an inert gas is input into the aluminum melt to combine with harmful substances to form a bubble-like mixture. These bubble-like mixtures will move to the surface of the aluminum melt, and then these bubble-like mixtures will be cleared in a targeted manner. The above method can globally remove harmful substances inside the aluminum melt, but the combination efficiency of the inert gas and harmful substances is low, and it is impossible to remove a large amount of harmful substances in a short time, which increases the time cost of removing harmful substances inside the aluminum melt. Summary of the invention

[0003] In view of the defects of the prior art, the present invention provides a method for removing non-metallic impurities and hydrogen from aluminum melt. Based on the dynamic characteristics of the injection of aluminum melt into the interior of a furnace body, an inert gas is synchronously transported into the interior of the furnace body, and based on the pressure change data inside the furnace body, the transport state of the inert gas is adjusted to make the aluminum melt fully contact with the inert gas and increase the amount of inert gas added into the aluminum melt; a centrifugal force is applied to the furnace body to rotate the furnace body, and the interior of the furnace body is visually identified to obtain the generation characteristics of a mixture formed by the fusion of the inert gas, non-metallic impurities and hydrogen in the aluminum melt, and the speed of the generation of the mixture is quantitatively characterized to adjust the action state of the rotation action until the aluminum melt reaches a saturated state of the mixture generation; based on the distribution position of the mixture in the aluminum melt, the mixture is separated and treated, and the aluminum melt is evenly cooled to improve the combination efficiency of the inert gas and harmful substances and reduce the time cost of removing harmful substances in the aluminum melt.

[0004] The present invention provides a method for removing non-metallic impurities and hydrogen from aluminum melt, comprising the following steps:

[0005] Step S1, injecting aluminum melt into a furnace body, and based on the injection dynamic characteristics of the aluminum melt, synchronously delivering an inert gas into the furnace body; obtaining pressure change data inside the furnace body, analyzing the pressure change data, and adjusting the delivery state of the inert gas;

[0006] Step S2, applying a corresponding centrifugal force to the furnace body to rotate the furnace body; visually identifying the interior of the rotating furnace body to obtain a generation feature of a mixture formed by fusion of the inert gas, non-metallic impurities and hydrogen in the aluminum melt;

[0007] Step S3, based on the mixture generation characteristics, adjusting the action state of the rotation action until the mixture generation saturation state is reached inside the aluminum melt; and then based on the distribution position of the mixture inside the aluminum melt, adjusting the position of the furnace body to move the mixture to the surface of the aluminum melt;

[0008] Step S4, based on the distribution position of the mixture on the surface of the aluminum melt, the aluminum melt is subjected to mixture separation treatment; and the aluminum melt is then subjected to uniform cooling treatment to obtain an aluminum alloy product.

[0009] In one embodiment disclosed in the present application, in the step S1, molten aluminum is injected into the interior of a furnace body, and based on the injection dynamic characteristics of the molten aluminum, an inert gas is synchronously delivered into the interior of the furnace body, including:

[0010] Injecting aluminum melt into the furnace body, and obtaining injection flow rate data and aluminum melt temperature data of the aluminum melt; analyzing the injection flow rate data and the aluminum melt temperature data to determine the fluid pressure change characteristics inside the aluminum melt itself during the process of injecting the aluminum melt into the furnace body;

[0011] Based on the fluid pressure variation characteristics, an inert gas is synchronously delivered to the interior of the furnace body, and the delivery pressure of the inert gas is adjusted at the same time.

[0012] In one embodiment disclosed in the present application, in the step S1, obtaining the pressure change data inside the furnace body, analyzing the pressure change data, and adjusting the delivery state of the inert gas include:

[0013] The gas pressure change data inside the furnace body during the process of injecting aluminum melt and conveying inert gas are obtained, and the gas pressure change data are analyzed to determine whether the inert gas mixed into the aluminum melt has reached a saturation state; if so, the conveying of inert gas into the furnace body is stopped; if not, the flow rate of the inert gas conveyed into the furnace body is adjusted based on the gas pressure change rate inside the furnace body.

[0014] In one embodiment disclosed in the present application, in the step S2, a corresponding centrifugal force is applied to the furnace body to rotate the furnace body, including:

[0015] Based on the external structure of the furnace body, the direction of the centrifugal force applied to the furnace body is determined; and based on the direction of action, a centrifugal force of a preset initial action magnitude is applied to the furnace body, thereby causing the furnace body to rotate.

[0016] In one embodiment disclosed in the present application, in the step S2, visual identification is performed on the inside of the rotating furnace body to obtain the generation characteristics of the mixture formed by the fusion of the inert gas, non-metallic impurities and hydrogen in the aluminum melt, including:

[0017] Performing infrared visual dynamic shooting of the interior of the furnace body that is performing a rotating motion to obtain an infrared dynamic image of the interior of the furnace body; identifying the infrared dynamic image to determine the diffusion movement trend information of the inert gas inside the aluminum melt;

[0018] Based on the diffusion trend movement information, the contact area and contact time length between the inert gas inside the aluminum melt and the non-metallic impurities and hydrogen inside the aluminum melt are predicted; and then based on the contact area and the contact time length, the rate of change of the volume of the mixture formed by the fusion of the inert gas inside the aluminum melt, the non-metallic impurities and hydrogen is obtained.

[0019] In one embodiment disclosed in the present application, in the step S3, based on the mixture generation characteristics, the action state of the rotation action is adjusted until the mixture generation saturation state is reached inside the aluminum melt, including:

[0020] The rate of change of the volume of the mixture formed by the fusion of the inert gas, non-metallic impurities and hydrogen inside the aluminum melt is compared with a preset rate threshold. If the rate of change of the volume of the mixture is less than the preset rate threshold, the angular velocity of the rotational action is increased; otherwise, the angular velocity of the rotational action is kept unchanged until the mixture is saturated inside the aluminum melt.

[0021] In one embodiment disclosed in the present application, in the step S3, based on the distribution position of the mixture inside the aluminum melt, the furnace body is adjusted in position so that the mixture moves to the surface of the aluminum melt, including:

[0022] The interior of the furnace body is again subjected to infrared visual identification to obtain the distribution position of the mixture inside the aluminum melt; based on the distribution position and the temperature distribution information inside the aluminum melt, the position of the furnace body is adjusted to make the mixture move along the corresponding path inside the aluminum melt to the surface of the aluminum melt.

[0023] In one embodiment disclosed in the present application, in the step S4, the aluminum melt is subjected to mixture separation processing based on the distribution position of the mixture on the surface of the aluminum melt, including:

[0024] Based on the distribution position of the mixture on the surface of the aluminum melt, the mixture on the surface of the aluminum melt is locally isolated and filtered to separate the mixture from the aluminum melt.

[0025] In one embodiment disclosed in the present application, in the step S4, the aluminum melt is uniformly cooled to obtain an aluminum alloy product, comprising:

[0026] The aluminum melt is poured from the inside of the furnace into a mold, and the entire surface of the mold is evenly cooled by spraying water to obtain an aluminum alloy product.

[0027] In one embodiment disclosed in the present application, in step S4, the entire surface of the mold is subjected to uniform water spray cooling treatment to obtain an aluminum alloy product, including:

[0028] During the process of uniformly spraying water to cool the entire surface, the surface solidification crack generation of the aluminum melt inside the mold is also identified to obtain the number and rate of surface crack generation of the aluminum melt itself during the cooling and solidification process; and then based on the number and rate of surface crack generation, the water spray flow rate of the uniform water spray cooling treatment is adjusted.

[0029] Compared with the prior art, the method for removing non-metallic impurities and hydrogen from aluminum melt is based on the dynamic characteristics of aluminum melt being injected into the furnace body, and inert gas is synchronously delivered into the furnace body. Based on the pressure change data inside the furnace body, the delivery state of the inert gas is adjusted to make the aluminum melt fully contact with the inert gas and increase the amount of inert gas added into the aluminum melt. Centrifugal force is applied to the furnace body to rotate the furnace body, and the inside of the furnace body is visually identified to obtain the generation characteristics of the mixture formed by the fusion of the inert gas, non-metallic impurities and hydrogen in the aluminum melt, and the speed of the generation of the mixture is quantitatively characterized to adjust the action state of the rotation action until the mixture is saturated inside the aluminum melt. Based on the distribution position of the mixture inside the aluminum melt, the mixture is separated and treated, and the aluminum melt is evenly cooled to improve the combination efficiency of the inert gas and harmful substances and reduce the time cost of removing harmful substances inside the aluminum melt.

[0030] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings.

[0031] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 The present invention provides a schematic flow chart of a method for removing non-metallic impurities and hydrogen from aluminum melt. DETAILED DESCRIPTION

[0034] 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.

[0035] See also Figure 1 , is a schematic flow chart of a method for removing non-metallic impurities and hydrogen from aluminum melt provided by an embodiment of the present invention. The method for removing non-metallic impurities and hydrogen from aluminum melt comprises:

[0036] Step S1, injecting aluminum melt into the furnace body, and based on the injection dynamic characteristics of the aluminum melt, synchronously delivering inert gas into the furnace body; obtaining pressure change data inside the furnace body, analyzing the pressure change data, and adjusting the delivery state of the inert gas;

[0037] Step S2, applying a corresponding centrifugal force to the furnace body to rotate the furnace body; visually identifying the interior of the rotating furnace body to obtain a generation feature of a mixture formed by fusion of the inert gas, non-metallic impurities and hydrogen in the aluminum melt;

[0038] Step S3, based on the mixture generation characteristics, adjusting the action state of the rotation action until the mixture generation saturation state is reached inside the aluminum melt; then based on the distribution position of the mixture inside the aluminum melt, adjusting the posture of the furnace body to move the mixture to the surface of the aluminum melt;

[0039] Step S4, based on the distribution position of the mixture on the surface of the aluminum melt, the aluminum melt is subjected to mixture separation treatment; and then the aluminum melt is subjected to uniform cooling treatment to obtain an aluminum alloy product.

[0040] The beneficial effects of the above technical scheme are as follows: the method for removing non-metallic impurities and hydrogen from aluminum melt is based on the dynamic characteristics of the injection of aluminum melt into the interior of the furnace body, and inert gas is synchronously delivered to the interior of the furnace body. Based on the pressure change data inside the furnace body, the delivery state of the inert gas is adjusted to make the aluminum melt fully contact with the inert gas and increase the amount of inert gas added to the aluminum melt; a centrifugal force is applied to the furnace body to rotate the furnace body, and the interior of the furnace body is visually identified to obtain the generation characteristics of the mixture formed by the fusion of the inert gas, non-metallic impurities and hydrogen in the aluminum melt, and the speed of the generation of the mixture is quantitatively characterized to adjust the action state of the rotation action until the mixture is saturated inside the aluminum melt; based on the distribution position of the mixture inside the aluminum melt, the mixture is separated and treated, and the aluminum melt is evenly cooled to improve the combination efficiency of the inert gas and harmful substances and reduce the time cost of removing harmful substances inside the aluminum melt.

[0041] Preferably, in step S1, aluminum melt is injected into the furnace body, and based on the injection dynamic characteristics of the aluminum melt, an inert gas is synchronously delivered into the furnace body, including:

[0042] Injecting aluminum melt into the furnace body, and obtaining injection flow rate data and aluminum melt temperature data of the aluminum melt; analyzing the injection flow rate data and the aluminum melt temperature data to determine the fluid pressure change characteristics inside the aluminum melt itself during the process of injecting the aluminum melt into the furnace body;

[0043] Based on the fluid pressure variation characteristics, inert gas is synchronously delivered to the interior of the furnace, and the delivery pressure of the inert gas is adjusted at the same time.

[0044] The beneficial effects of the above technical solution are as follows: aluminum melt is a high-temperature and high-pressure fluid. If an inert gas is directly input into the aluminum melt in an open space, it is impossible to ensure that the inert gas is fully and quickly incorporated into the aluminum melt, and the efficiency of combining the inert gas with the non-metallic impurities and hydrogen inside the aluminum melt is reduced. For this reason, the aluminum melt is injected into the furnace body, and during the injection of the aluminum melt, the injection flow rate data and the temperature data of the aluminum melt are obtained, so as to calculate the fluid pressure inside the aluminum melt, and accurately determine the fluid pressure change characteristics inside the aluminum melt itself during the injection of the aluminum melt into the furnace body. Generally speaking, the greater the fluid pressure inside the aluminum melt itself, the greater the need to increase the inert gas delivery pressure to ensure that the inert gas has sufficient pressure to be incorporated into the aluminum melt. In addition, when the aluminum melt is injected into the furnace body, the inert gas is simultaneously input into the furnace body, which can increase the contact area between the aluminum melt and the inert gas in a relatively closed environment and improve the fusion rate of the inert gas and the aluminum melt.

[0045] Preferably, in step S1, obtaining pressure change data inside the furnace body, analyzing the pressure change data, and adjusting the delivery state of the inert gas include:

[0046] The pressure change data inside the furnace body during the process of injecting aluminum melt and conveying inert gas are obtained, and the pressure change data are analyzed to determine whether the inert gas mixed into the aluminum melt has reached a saturation state; if so, the conveying of inert gas into the furnace body is stopped; if not, the flow rate of the inert gas conveyed into the furnace body is adjusted based on the pressure change rate inside the furnace body.

[0047] The beneficial effects of the above technical solution are as follows: during the process of injecting aluminum melt and conveying inert gas into the furnace body, the inert gas will be integrated into the aluminum melt, so that the gas pressure inside the furnace body will not increase due to the continuous input of inert gas in the initial stage; when the inert gas added into the aluminum melt reaches the saturation state, the inert gas will not be able to continue to be added into the aluminum melt, and the gas pressure inside the furnace body will increase. By analyzing the gas pressure change data inside the furnace body during the process of injecting aluminum melt and conveying inert gas, it is determined whether the gas pressure inside the furnace body increases rapidly. If so, it is determined that the inert gas added into the aluminum melt has reached the saturation state. At this time, the inert gas is stopped from being conveyed into the furnace body to avoid accidents caused by excessive gas pressure inside the furnace body; otherwise, it is determined that the inert gas added into the aluminum melt has not reached the saturation state. At this time, based on the gas pressure change rate inside the furnace body, the flow rate of the inert gas conveyed into the furnace body is adjusted to ensure that the input inert gas can be fused into the aluminum melt to the maximum extent.

[0048] Preferably, in step S2, a corresponding centrifugal force is applied to the furnace body to rotate the furnace body, including:

[0049] Based on the external structure of the furnace body, the direction of the centrifugal force applied to the furnace body is determined; and based on the direction of action, a centrifugal force of a preset initial action magnitude is applied to the furnace body, thereby causing the furnace body to rotate.

[0050] The beneficial effect of the above technical solution is as follows: when enough inert gas is fused into the aluminum melt, these inert gases will be distributed in the aluminum melt in the form of bubbles. In order to make the inert gas fully contact and combine with the non-metallic impurities and harmful substances such as hydrogen in the aluminum melt, the direction of the centrifugal force applied to the furnace body is determined based on the external structure of the furnace body. In this way, when the furnace body is applied with a centrifugal force, the furnace body will rotate with the corresponding axis as the rotation axis. Correspondingly, the inert gas bubbles in the aluminum melt will diffuse in the aluminum melt under the influence of the centrifugal force, which can increase the contact probability between the inert gas and the harmful substances in different positions in the aluminum melt. In addition, based on the direction of action, a centrifugal force of a preset initial action size is applied to the furnace body, so that the furnace body rotates, effectively adjusting the running state of the inert gas in the aluminum melt.

[0051] Preferably, in step S2, visual identification is performed on the interior of the rotating furnace to obtain the generation characteristics of a mixture formed by the fusion of the inert gas, non-metallic impurities and hydrogen in the aluminum melt, including:

[0052] The infrared visual dynamic shooting of the interior of the rotating furnace body is carried out to obtain the infrared dynamic image of the interior of the furnace body; the infrared dynamic image is identified to determine the diffusion movement trend information of the inert gas inside the aluminum melt;

[0053] Based on the diffusion trend movement information, the contact area and contact time between the inert gas inside the aluminum melt and the non-metallic impurities and hydrogen inside the aluminum melt are predicted; then based on the contact area and contact time, the rate of change of the volume of the mixture formed by the fusion of the inert gas inside the aluminum melt, the non-metallic impurities and hydrogen is obtained.

[0054] The beneficial effects of the above technical solution are: infrared visual dynamic shooting of the inside of the furnace body is performed during the rotation of the furnace body to obtain an infrared dynamic image of the inside of the furnace body, so that the diffusion movement trend of the inert gas inside the aluminum melt during the centrifugal rotation process can be fully characterized and identified. In addition, based on the diffusion trend movement information, the contact area and contact time length between the inert gas inside the aluminum melt and the non-metallic impurities and hydrogen inside the aluminum melt are predicted. The larger the contact area or the longer the contact time length between the inert gas and the non-metallic impurities and hydrogen inside the aluminum melt, the greater the amount of the mixture formed by the fusion of the inert gas, non-metallic impurities and hydrogen inside the aluminum melt. Based on the contact area and contact time length, the rate of change of the volume of the mixture formed by the fusion of the inert gas, non-metallic impurities and hydrogen inside the aluminum melt is obtained, which provides a basis for the subsequent judgment of whether the mixture generation saturation state has been reached inside the aluminum melt.

[0055] Preferably, in step S3, based on the mixture generation characteristics, the action state of the rotation action is adjusted until the mixture generation saturation state is reached inside the aluminum melt, including:

[0056] The rate of change of the volume of the mixture formed by the fusion of the inert gas, non-metallic impurities and hydrogen inside the aluminum melt is compared with the preset rate threshold. If the rate of change of the volume of the mixture is less than the preset rate threshold, the angular velocity of the rotational action is increased; otherwise, the angular velocity of the rotational action is kept unchanged until the mixture is saturated inside the aluminum melt.

[0057] The beneficial effect of the above technical solution is: the rate of change of the volume of the mixture formed by the fusion of the inert gas inside the aluminum melt, non-metallic impurities and hydrogen is compared with the preset rate threshold. If the rate of change of the volume of the mixture is less than the preset rate threshold, it indicates that the aluminum melt has not reached the saturation state of the mixture. At this time, the angular velocity of the rotation action is increased. As the angular velocity of the rotation increases, the inert gas inside the aluminum melt can diffuse rapidly, further increasing the contact probability of the inert gas and harmful substances, and improving the generation efficiency of the mixture.

[0058] Preferably, in step S3, based on the distribution position of the mixture inside the aluminum melt, the furnace body is adjusted to move the mixture to the surface of the aluminum melt, including:

[0059] The interior of the furnace is again subjected to infrared visual identification to obtain the distribution position of the mixture inside the aluminum melt; based on the distribution position and the temperature distribution information inside the aluminum melt, the position of the furnace is adjusted to allow the mixture to move along the corresponding path inside the aluminum melt to the surface of the aluminum melt.

[0060] The beneficial effect of the above technical solution is: infrared visual identification is performed again on the inside of the furnace body to obtain the distribution position of the mixture inside the aluminum melt. At this time, the mixture will move due to the density difference between itself and the aluminum melt. In order to accelerate the speed and stability of the movement of the mixture to the surface of the aluminum melt, the furnace body is adjusted based on the distribution position and the temperature distribution information inside the aluminum melt, so that the mixture moves along the corresponding path inside the aluminum melt to the surface of the aluminum melt. This can prevent the mixture from remaining in the aluminum melt for a long time and unable to be cleared in a targeted manner.

[0061] Preferably, in step S4, the aluminum melt is subjected to mixture separation treatment based on the distribution position of the mixture on the surface of the aluminum melt, including:

[0062] Based on the distribution position of the mixture on the surface of the aluminum melt, the mixture on the surface of the aluminum melt is locally isolated and filtered to separate the mixture from the aluminum melt.

[0063] The beneficial effect of the above technical solution is: based on the distribution position of the mixture on the surface of the aluminum melt, the mixture on the surface of the aluminum melt is locally isolated and filtered using a filter net, so that the mixture can be quickly separated from the inside of the aluminum melt, thereby improving the impurity removal efficiency of the aluminum melt.

[0064] Preferably, in step S4, the aluminum melt is uniformly cooled to obtain an aluminum alloy product, comprising:

[0065] The aluminum melt is poured from the inside of the furnace into the mold, and the entire surface of the mold is evenly sprayed with water for cooling to obtain an aluminum alloy product.

[0066] The beneficial effect of the above technical solution is: after the non-metallic impurities and harmful substances such as hydrogen inside the aluminum melt are removed and separated, the aluminum melt is poured from the inside of the furnace into the mold, and the entire surface of the mold is evenly sprayed with water for cooling to obtain an aluminum alloy product, which can avoid secondary contamination of the aluminum melt.

[0067] Preferably, in step S4, the entire surface of the mold is subjected to uniform water spray cooling treatment to obtain an aluminum alloy product, including:

[0068] During the process of uniformly spraying water to cool the entire surface, the surface solidification crack generation of the aluminum melt inside the mold is also identified to obtain the number and rate of surface crack generation of the aluminum melt during the cooling and solidification process; then, based on the number and rate of surface crack generation, the water spray flow rate of the uniform water spray cooling treatment is adjusted.

[0069] The beneficial effect of the above technical scheme is as follows: in the process of uniformly spraying water to cool the entire surface, the surface solidification crack generation of the aluminum melt inside the mold is also identified, and the number and rate of surface crack generation of the aluminum melt itself during the cooling and solidification process are obtained. When the number and rate of surface crack generation are large, it indicates that the cooling speed of the aluminum melt is too fast and the internal stress distribution is uneven. At this time, the water spray flow rate of the uniform water spray cooling treatment is reduced to reduce the number of internal stress structural defects of the aluminum alloy product.

[0070] It can be seen from the contents of the above embodiments that the method for removing non-metallic impurities and hydrogen from aluminum melt is based on the dynamic characteristics of the injection of aluminum melt into the interior of the furnace body, synchronously conveying inert gas into the furnace body, and adjusting the conveying state of the inert gas based on the pressure change data inside the furnace body, so that the aluminum melt is fully in contact with the inert gas, and increasing the amount of inert gas incorporated into the aluminum melt; applying a centrifugal force to the furnace body to rotate the furnace body, and visually identifying the interior of the furnace body to obtain the generation characteristics of the mixture formed by the fusion of the inert gas, non-metallic impurities and hydrogen in the aluminum melt, and quantifying the speed of the generation of the mixture, so as to adjust the action state of the rotation action until the mixture is saturated inside the aluminum melt; also based on the distribution position of the mixture inside the aluminum melt, the mixture is separated and treated, and the aluminum melt is evenly cooled to improve the combination efficiency of the inert gas and harmful substances and reduce the time cost of removing harmful substances inside the aluminum melt.

[0071] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for removing non-metallic impurities and hydrogen from aluminum melt, characterized in that: It includes the following steps: Step S1, injecting aluminum melt into a furnace body, and based on the injection dynamic characteristics of the aluminum melt, synchronously delivering an inert gas into the furnace body; obtaining pressure change data inside the furnace body, analyzing the pressure change data, and adjusting the delivery state of the inert gas; Step S2, applying a corresponding centrifugal force to the furnace body to rotate the furnace body; visually identifying the interior of the rotating furnace body to obtain a generation feature of a mixture formed by fusion of the inert gas, non-metallic impurities and hydrogen in the aluminum melt; Step S3, adjusting the action state of the rotating action based on the mixture generation characteristics until the mixture generation saturation state is reached inside the aluminum melt; Based on the distribution position of the mixture inside the aluminum melt, the furnace body is adjusted in position to move the mixture to the surface of the aluminum melt; Step S4, performing mixture separation processing on the aluminum melt based on the distribution position of the mixture on the surface of the aluminum melt; The aluminum melt is then uniformly cooled to obtain an aluminum alloy product.

2. The method for removing non-metallic impurities and hydrogen from aluminum melt according to claim 1, characterized in that: In the step S1, molten aluminum is injected into the interior of a furnace body, and based on the injection dynamic characteristics of the molten aluminum, an inert gas is synchronously delivered into the interior of the furnace body, including: Injecting aluminum melt into the furnace body, and obtaining injection flow rate data and aluminum melt temperature data of the aluminum melt; analyzing the injection flow rate data and the aluminum melt temperature data to determine the fluid pressure change characteristics inside the aluminum melt itself during the process of injecting the aluminum melt into the furnace body; Based on the fluid pressure variation characteristics, an inert gas is synchronously delivered to the interior of the furnace body, and the delivery pressure of the inert gas is adjusted at the same time.

3. The method for removing non-metallic impurities and hydrogen from aluminum melt according to claim 2, characterized in that: In the step S1, obtaining the pressure change data inside the furnace body, analyzing the pressure change data, and adjusting the delivery state of the inert gas include: The gas pressure change data inside the furnace body during the process of injecting aluminum melt and conveying inert gas are obtained, and the gas pressure change data are analyzed to determine whether the inert gas mixed into the aluminum melt has reached a saturation state; if so, the conveying of inert gas into the furnace body is stopped; if not, the flow rate of the inert gas conveyed into the furnace body is adjusted based on the gas pressure change rate inside the furnace body.

4. The method for removing non-metallic impurities and hydrogen from aluminum melt according to claim 1, characterized in that: In the step S2, a corresponding centrifugal force is applied to the furnace body to rotate the furnace body, including: Based on the external structure of the furnace body, the direction of the centrifugal force applied to the furnace body is determined; and based on the direction of action, a centrifugal force of a preset initial action magnitude is applied to the furnace body, thereby causing the furnace body to rotate.

5. The method for removing non-metallic impurities and hydrogen from aluminum melt according to claim 4, characterized in that: In the step S2, visual identification is performed on the interior of the rotating furnace to obtain the generation characteristics of a mixture formed by the fusion of the inert gas, non-metallic impurities and hydrogen in the aluminum melt, including: Performing infrared visual dynamic shooting of the interior of the furnace body that is performing a rotating motion to obtain an infrared dynamic image of the interior of the furnace body; identifying the infrared dynamic image to determine the diffusion movement trend information of the inert gas inside the aluminum melt; Based on the diffusion trend movement information, the contact area and contact time length between the inert gas inside the aluminum melt and the non-metallic impurities and hydrogen inside the aluminum melt are predicted; and then based on the contact area and the contact time length, the rate of change of the volume of the mixture formed by the fusion of the inert gas inside the aluminum melt, the non-metallic impurities and hydrogen is obtained.

6. The method for removing non-metallic impurities and hydrogen from aluminum melt according to claim 1, characterized in that: In the step S3, based on the mixture generation characteristics, the action state of the rotation action is adjusted until the mixture generation saturation state is reached inside the aluminum melt, including: The rate of change of the volume of the mixture formed by the fusion of the inert gas, non-metallic impurities and hydrogen inside the aluminum melt is compared with a preset rate threshold. If the rate of change of the volume of the mixture is less than the preset rate threshold, the angular velocity of the rotational action is increased; otherwise, the angular velocity of the rotational action is kept unchanged until the mixture is saturated inside the aluminum melt.

7. The method for removing non-metallic impurities and hydrogen from aluminum melt according to claim 6, characterized in that: In the step S3, based on the distribution position of the mixture inside the aluminum melt, the furnace body is adjusted in position so that the mixture moves to the surface of the aluminum melt, including: The interior of the furnace body is again subjected to infrared visual identification to obtain the distribution position of the mixture inside the aluminum melt; based on the distribution position and the temperature distribution information inside the aluminum melt, the position of the furnace body is adjusted to make the mixture move along the corresponding path inside the aluminum melt to the surface of the aluminum melt.

8. The method for removing non-metallic impurities and hydrogen from aluminum melt according to claim 1, characterized in that: In the step S4, the aluminum melt is subjected to mixture separation processing based on the distribution position of the mixture on the surface of the aluminum melt, including: Based on the distribution position of the mixture on the surface of the aluminum melt, the mixture on the surface of the aluminum melt is locally isolated and filtered to separate the mixture from the aluminum melt.

9. The method for removing non-metallic impurities and hydrogen from aluminum melt according to claim 8, characterized in that: In the step S4, the aluminum melt is uniformly cooled to obtain an aluminum alloy product, comprising: The aluminum melt is poured from the inside of the furnace into a mold, and the entire surface of the mold is evenly cooled by spraying water to obtain an aluminum alloy product.

10. The method for removing non-metallic impurities and hydrogen from aluminum melt according to claim 9, characterized in that: In the step S4, the entire surface of the mold is subjected to uniform water spray cooling treatment to obtain an aluminum alloy product, including: During the process of uniformly spraying water to cool the entire surface, the surface solidification crack generation of the aluminum melt inside the mold is also identified to obtain the number and rate of surface crack generation of the aluminum melt itself during the cooling and solidification process; and then based on the number and rate of surface crack generation, the water spray flow rate of the uniform water spray cooling treatment is adjusted.

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