A negative pressure combined type gas and inclusion removal aluminum melt purification device and a control method thereof

Abstract

This application discloses a negative pressure composite degassing and impurity removal aluminum melt purification equipment and its control method. The negative pressure composite degassing and impurity removal aluminum melt purification equipment includes a housing and a heating mechanism. The heating mechanism includes a first heating component and a second heating component. The first heating component is disposed outside the housing to supply hot air to the housing, and the second heating component is disposed inside the housing. This negative pressure composite degassing and impurity removal aluminum melt purification equipment can improve the temperature drop of the aluminum melt, reduce temperature fluctuations in the aluminum melt, and improve the quality of cast aluminum products. The entire process is automatically controlled, which can improve production efficiency. The control method of the negative pressure composite degassing and impurity removal aluminum melt purification equipment disclosed in this application achieves automatic control throughout the entire process, reducing product quality fluctuations caused by human operation, improving system stability and safety, and reducing the occurrence of safety accidents.

Description

Technical Field

[0001] This application relates to the technical field of metal melt processing equipment, and more specifically, to a negative pressure composite degassing and impurity removal aluminum melt purification equipment and its control method. Background Technology

[0002] The existing negative pressure composite degassing and impurity removal aluminum melt purification equipment uses external hot air preheating. During preheating, the temperature of the inner lining of the chamber is much lower than the melting point of the aluminum melt. When production begins, because the temperature of the aluminum melt is higher than the temperature of the inner lining of the chamber, the temperature of the inner lining of the chamber will absorb the temperature of the aluminum melt, thereby reducing the temperature of the aluminum melt and affecting the quality of the cast aluminum products.

[0003] Therefore, how to improve the temperature drop of the negative pressure composite degassing and impurity removal aluminum melt purification equipment in order to improve the quality of cast aluminum products has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] In view of this, the purpose of this application is to disclose a negative pressure composite degassing and impurity removal aluminum melt purification device to improve the situation of aluminum melt temperature drop and improve the quality of cast aluminum products.

[0005] Another core aspect of this application is the disclosure of a control method for the aforementioned negative pressure composite degassing and impurity removal aluminum melt purification equipment.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] A negative pressure composite degassing and impurity removal aluminum melt purification device includes a housing and a heating mechanism. The heating mechanism includes a first heating component and a second heating component. The first heating component is disposed outside the housing to deliver hot air to the housing, and the second heating component is disposed inside the housing.

[0008] Optionally, in the above-mentioned negative pressure composite degassing and impurity removal aluminum melt purification equipment, the box body includes a box body and an inner lining structure disposed on the inner wall of the box body, and the second heating component includes a first heating structure disposed inside the inner lining structure, the first heating structure including at least one first heating element.

[0009] Optionally, in the above-mentioned negative pressure composite degassing and impurity removal aluminum melt purification equipment, the second heating component further includes a second heating structure, which is disposed on the top of the housing.

[0010] Optionally, in the above-mentioned negative pressure composite degassing and impurity removal aluminum melt purification equipment, the inside of the box is provided with a partition, which divides the box into a first chamber and a second chamber that are connected. The first chamber is provided with a first rotor, and the second chamber is provided with a second rotor.

[0011] Optionally, in the above-mentioned negative pressure composite degassing and impurity removal aluminum melt purification equipment, an aluminum liquid channel is provided on the outside of the box, and the box has an aluminum liquid inlet and an aluminum liquid outlet. The aluminum liquid inlet is connected to the aluminum liquid channel and the first chamber, respectively, and the aluminum liquid outlet is connected to the aluminum liquid channel and the second chamber, respectively.

[0012] Optionally, in the above-mentioned negative pressure composite degassing and impurity removal aluminum melt purification equipment, the aluminum liquid channel is provided with a gate assembly, the gate assembly includes a first gate and a second gate, the first gate and the second gate are vertically and vertically disposed in the aluminum liquid channel, along the aluminum liquid conveying direction, the first gate is disposed downstream of the aluminum liquid inlet, and the second gate is disposed downstream of the aluminum liquid outlet.

[0013] Optionally, in the above-mentioned negative pressure composite degassing and impurity removal aluminum melt purification equipment, the negative pressure composite degassing and impurity removal aluminum melt purification equipment includes a vacuuming mechanism, the vacuuming mechanism includes a dust removal component and a vacuum generating component, the dust removal component is connected to the housing; the vacuum generating component is connected to the dust removal component to evacuate the housing.

[0014] Optionally, in the above-mentioned negative pressure composite degassing and impurity removal aluminum melt purification equipment, the negative pressure composite degassing and impurity removal aluminum melt purification equipment includes a parameter detection component and a control system. The parameter detection component includes a temperature measuring element and a liquid level measuring element. The liquid level measuring element is used to measure the liquid level of the aluminum melt in the tank, and the temperature measuring element is used to measure the temperature of the aluminum melt.

[0015] The gate assembly includes a first gate driver and a second gate driver. The first gate driver can drive the first gate to move up and down, and the second gate driver can drive the second gate to move up and down.

[0016] The drive unit of the first rotor, the drive unit of the second rotor, the first heating assembly, the second heating assembly, the vacuum generating assembly, the parameter detection assembly, the first gate drive unit, and the second gate drive unit are all connected to the control system.

[0017] Optionally, in the above-mentioned negative pressure composite degassing and impurity removal aluminum melt purification equipment, the first heating component includes an air duct, a fan, and a heater. The fan and the heater are both disposed in the air duct. One end of the air duct is provided with an air inlet, and the other end is connected to the bottom of the box. The heater includes at least one.

[0018] The control system includes an electrical control cabinet, the air duct includes an air inlet duct and an air outlet duct, the inlet of the fan is connected to the air inlet duct, the outlet of the fan is connected to the air outlet duct, the heater is installed in the air outlet duct, and the side wall of the electrical control cabinet serves as the air inlet duct.

[0019] Optionally, in the above-mentioned negative pressure composite degassing and impurity removal aluminum melt purification equipment, the air outlet duct is detachably connected to the housing, and the aluminum liquid outlet is configured as the air outlet of the air outlet duct.

[0020] A control method for a negative pressure composite degassing and impurity removal aluminum melt purification device, used in the aforementioned negative pressure composite degassing and impurity removal aluminum melt purification device, includes the following steps:

[0021] Preheat the chamber, start the first heating component and the second heating component to heat the chamber, and stop the first heating component when the temperature inside the chamber reaches the preset temperature threshold;

[0022] Liquid aluminum is conveyed through the liquid aluminum channel into the tank.

[0023] Vacuum degassing: The dust removal component and the vacuum generating component are activated to evacuate the chamber. At the same time, the first rotor and the second rotor are activated to monitor the liquid level value of the chamber. The liquid level value of the chamber is compared with the preset liquid level. Based on the comparison result, the equipment control command corresponding to the threshold range to which the current liquid level belongs is executed.

[0024] Optionally, in the above-mentioned negative pressure composite degassing and impurity removal aluminum melt purification equipment control method, the vacuum degassing step includes:

[0025] When the liquid level in the tank reaches the first preset liquid level, the dust removal component and the vacuum generating component are activated.

[0026] When the liquid level in the tank rises to the second preset liquid level, the rotor speed is adjusted to the preset speed, and the height of the second preset liquid level is greater than the height of the first preset liquid level;

[0027] When the liquid level in the tank rises to the third preset liquid level, the first gate is closed and the second gate is activated. The height of the third preset liquid level is greater than the height of the second preset liquid level.

[0028] As can be seen from the above scheme, the negative pressure composite degassing and impurity removal aluminum melt purification equipment disclosed in this application is equipped with both a first heating component and a second heating component. When preheating of the chamber is required, both the first and second heating components can be turned on simultaneously, and their synergistic effect can improve heating efficiency. When vacuum degassing of the aluminum melt, the first heating component is turned off and the second heating component is turned on, so that the temperature of the aluminum melt and the temperature of the chamber are higher than the melting point of the aluminum melt, thereby improving the temperature drop of the aluminum melt, reducing temperature fluctuations of the aluminum melt, and improving the quality of cast aluminum products. At the same time, it can achieve precise temperature control.

[0029] The negative pressure composite degassing and impurity removal aluminum melt purification equipment control method disclosed in this application realizes full-process automatic control, which can ensure that parameters such as vacuum degree, rotor speed, inert gas flow rate, and processing time are consistent for each aluminum melt treatment, reducing product quality fluctuations caused by human operation; the segmented linkage control of vacuum degree, rotor speed, and inert gas flow rate can improve the removal rate of hydrogen and impurities; it can improve production efficiency, enhance system stability and safety, and reduce the occurrence of safety accidents. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of the negative pressure composite degassing and impurity removal aluminum melt purification equipment disclosed in the embodiments of this application;

[0032] Figure 2 This is a front view of the negative pressure composite degassing and impurity removal aluminum melt purification equipment disclosed in the embodiments of this application;

[0033] Figure 3 for Figure 2 Sectional view of AA;

[0034] Figure 4 This is a schematic diagram of the liquid level in the tank disclosed in the application embodiment.

[0035] Among them, 100 is the base, 200 is the housing, 210 is the rotor, 211 is the inclined channel, 220 is the aluminum liquid inlet, 230 is the aluminum liquid outlet, 300 is the aluminum liquid channel, 310 is the gate assembly, 311 is the first gate, 312 is the second gate, 313 is the first gate drive, 314 is the second gate drive, 400 is the first heating assembly, 410 is the air duct, 411 is the air inlet duct, 412 is the air outlet duct, 4121 is the first air duct, 4122 is the second air duct, 420 is the fan, 430 is the heater, 500 is the second heating assembly, 510 is the second heating structure, 600 is the dust removal assembly, 700 is the vacuum generating assembly, 800 is the electrical control cabinet, 900 is the waste slag collection assembly, and 1000 is the laser rangefinder. Detailed Implementation

[0036] The core of this application is to disclose a negative pressure composite degassing and impurity removal aluminum melt purification device to improve the situation of aluminum melt temperature drop and improve the quality of cast aluminum products.

[0037] Another core aspect of this application is the disclosure of a control method for the aforementioned negative pressure composite degassing and impurity removal aluminum melt purification equipment.

[0038] First, a brief introduction to the negative pressure composite degassing and impurity removal aluminum melt purification equipment. This equipment uses a rotating rotor to break up inert gas into dispersed bubbles. The hydrogen and oxide inclusions in the molten aluminum are removed by utilizing partial pressure difference and surface adsorption. The high-speed rotating rotor, which injects inert gas, breaks down large inert gas bubbles into very fine bubbles, dispersing them evenly throughout the molten aluminum. By reducing the bubble diameter, the total surface area of ​​the bubbles increases, allowing more inert bubble surfaces to come into contact with hydrogen and impurities in the molten metal, thus bringing harmful substances to the liquid surface.

[0039] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] like Figure 1 and Figure 2 As shown in the embodiment of this application, a negative pressure composite degassing and impurity removal aluminum melt purification device is disclosed, including a housing 200 and a heating mechanism. The heating mechanism includes a first heating component 400 and a second heating component 500. The first heating component 400 is disposed outside the housing 200 to deliver hot air to the housing 200, and the second heating component 500 is disposed inside the housing 200.

[0041] In actual operation, the chamber 200 must first be preheated. At this time, the first heating component 400 and the second heating component 500 can be turned on simultaneously to heat the chamber 200. When the temperature of the chamber 200 reaches the preset temperature threshold, the first heating component 400 is turned off and aluminum liquid is transported into the chamber 200. During the process of transporting aluminum liquid to the chamber 200, the opening and closing of the second heating component 500 or the heating power can be adjusted according to the temperature of the chamber 200.

[0042] The negative pressure composite degassing and impurity removal aluminum melt purification equipment disclosed in this application embodiment is equipped with a first heating component 400 and a second heating component 500. When preheating of the chamber 200 is required, the first heating component 400 and the second heating component 500 can be turned on simultaneously, and their synergistic effect can improve heating efficiency. When vacuum degassing of the aluminum melt, the first heating component 400 is turned off and the second heating component 500 is turned on, so that the temperature of the aluminum melt and the temperature of the chamber 200 are higher than the melting point of the aluminum melt, thereby improving the temperature drop of the aluminum melt, reducing temperature fluctuations of the aluminum melt, and improving the quality of cast aluminum products. At the same time, it can achieve precise temperature control.

[0043] In some specific embodiments, the housing 200 includes a housing body and an inner lining structure disposed on the inner wall of the housing body. The second heating assembly 500 includes a first heating structure disposed inside the inner lining structure. The first heating structure includes at least one first heating element, preferably multiple first heating elements. These multiple first heating elements are preferably spaced apart circumferentially and preferably spaced apart along the height of the housing 200. Specifically, the types of first heating elements include, but are not limited to, resistance wires and silicon carbide rods. The first heating structure can heat the molten aluminum, compensating for temperature loss. Specifically, the second heating structure can be embedded in the inner lining structure during casting.

[0044] In some specific embodiments, such as Figure 1 and Figure 3 As shown, the second heating assembly 500 is disposed on the top of the housing 200. The second heating assembly 500 includes at least one second heating element, which are spaced apart. Specifically, the second heating element is preferably a silicon carbide heating rod. The second heating element is connected to the flange on the top of the housing 200 via a flange. The specific number of second heating elements can be determined according to actual needs. Heat-resistant sealing gaskets are provided at the flange-to-flange connection points to ensure the sealing performance of the housing 200. In actual operation, it is necessary to ensure that the liquid level of the molten aluminum inside the housing 200 is lower than the bottom of the second heating element, that is, the second heating element does not come into contact with the molten aluminum, in order to protect the second heating element and extend its service life.

[0045] In some specific embodiments, a partition is provided inside the housing 200, dividing the housing 200 into a first chamber and a second chamber that are interconnected. A first rotor 210 is installed in the first chamber, and a second rotor is installed in the second chamber. The rotors rotate while simultaneously conveying inert gas. Specifically, the partition is located at the bottom of the housing 200, with its top positioned at a predetermined distance from the top of the housing, thus dividing the housing 200 into a first chamber and a second chamber that are interconnected at the top. The first rotor 210 and the second rotor are respectively located at the bottom of the first chamber and the second chamber. In this embodiment, dividing the housing 200 into a first chamber and a second chamber, and installing rotors in each, can improve the degassing effect of the molten aluminum and increase the degassing efficiency. Figure 3 Only the first rotor 210 is shown in the diagram. It should be noted that the rotor drive can be a motor, and the connection between the motor and the rotor can be a rigid shaft connection or a belt and pulley drive. The specific connection method can be determined according to the actual situation.

[0046] Preferably, based on the above embodiments, the second heating structure 510 can be disposed above the partition, or it can be disposed in the first chamber and the second chamber respectively, which can be determined according to actual needs.

[0047] In some specific embodiments, an aluminum liquid channel 300 is provided on the outside of the housing 200 for conveying aluminum liquid. The housing 200 has an aluminum liquid inlet 220 and an aluminum liquid outlet 230. The aluminum liquid inlet 220 is connected to the aluminum liquid channel 300 and the first chamber, respectively, and the aluminum liquid outlet 230 is connected to the aluminum liquid channel 300 and the second chamber, respectively.

[0048] In some specific embodiments, such as Figures 1-3 As shown, the aluminum liquid channel 300 is equipped with a gate assembly 310, which includes a first gate 311, a first gate drive 313, a second gate 312, and a second gate drive 314. The first gate drive 313 is connected to the first gate 311 to drive the first gate 311 to move up and down. The second gate drive 314 is connected to the second gate to drive the second gate 312 to move up and down. Along the aluminum liquid conveying direction, the first gate 311 is located downstream of the aluminum liquid inlet 220, and the second gate 312 is located downstream of the aluminum liquid outlet 230. The first gate 311 is used to control the aluminum liquid entering the tank 200, and the second gate 312 is used to control the aluminum liquid flowing out of the tank 200.

[0049] Specifically, the first gate drive component 313 can be a drive cylinder or a hydraulic cylinder. Taking a drive cylinder as an example, the piston rod of the drive cylinder is connected to the first gate 311, and the lifting and lowering of the first gate 311 is driven by the extension and retraction of the piston rod. Alternatively, the first gate drive component 313 can be a linear motor, an electric telescopic rod, etc. The specific type of the second gate drive component 314 can be referred to the specific type of the first gate drive component 313, and will not be repeated here. The shape and size of the first gate 311 and the second gate 312 match the shape and size of the aluminum liquid channel 300, so that when either the first gate 311 or the second gate 312 is in contact with the wall of the aluminum liquid channel 300, it can block the aluminum liquid channel 300 and block the advance of the aluminum liquid.

[0050] In actual use, after the preheating of the housing 200 is completed, the first gate drive 313 drives the first gate 311 to rise until it is no longer in contact with the wall of the aluminum liquid channel 300 and is at a preset distance from the bottom wall. The second gate drive 314 drives the second gate 312 to fall to a state where it is in contact with the wall of the aluminum liquid channel 300. At this time, the aluminum liquid outlet 230 has the same function as the aluminum liquid inlet 220, serving as the aluminum liquid inlet 220. The aluminum liquid enters the first and second chambers of the housing 200 through the aluminum liquid channel 300, the aluminum liquid inlet 220 and the aluminum liquid outlet 230. At this time, the aluminum liquid enters the interior of the housing 200 from both sides, which can increase the rate at which the aluminum liquid surface covers the inlet and outlet, and make the aluminum liquid rise synchronously in the two chambers, thereby increasing the entry rate of the aluminum liquid. The two rotors in the housing 200 are in a low-speed motion state at this time, and the inert gas flows in at a low flow rate. The inert gas can be argon or nitrogen. The inert gas supply assembly can be equipped with a regulating valve to adjust the flow rate of the inert gas by adjusting the opening of the control valve.

[0051] In some specific embodiments, such as Figure 1 As shown, the negative pressure composite degassing and impurity removal aluminum melt purification equipment includes a base 100, which provides support. The housing 200 is disposed on the base 100, and the gas supply component in the above embodiment is also disposed on the base 100.

[0052] In some specific embodiments, the negative pressure composite degassing and impurity removal aluminum melt purification equipment includes a vacuuming mechanism, which includes a dust removal component 600 and a vacuum generating component 700. The dust removal component 600 is connected to the housing 200, and the vacuum generating component 700 is connected to the dust removal component 600 to evacuate the housing 200.

[0053] During the process of molten aluminum being transported from the molten aluminum channel 300 to the housing 200, when the liquid level in the housing 200 reaches the first preset liquid level, the vacuum generating component 700 and the dust removal component 600 are activated to evacuate the housing 200. When the liquid level of the molten aluminum in the housing 200 rises to the second preset liquid level, the rotor is adjusted from a low speed to a preset speed, and the inert gas flow rate reaches the preset flow rate. When the liquid level of the molten aluminum in the housing 200 continues to rise to the third preset liquid level, the first gate drive component 313 drives the first gate 311 to descend to abut against the wall of the molten aluminum channel 300, and the second gate drive component 314 drives the second gate 312 to rise to disengage from the wall of the molten aluminum channel 300 and be higher than the bottom wall of the molten aluminum channel 300 by a preset distance, so that the processed molten aluminum in the housing 200 is discharged through the molten aluminum outlet 230 and enters the next process for later use. Preferably, the second gate drive unit can respond to the PID control signal output by the control system to drive the second gate 312 to rise and fall. The use of PID regulation can ensure the vacuum degree of the box 200 and ensure the degassing effect of the aluminum liquid.

[0054] In some specific embodiments, the dust collection assembly 600 includes a dust collection box with an internal partition dividing it into upper and lower chambers. The lower chamber contains a filter element. A vacuum generating assembly 700 communicates with the upper chamber. When the vacuum generating assembly 700 is activated, gas drawn from inside the box 200 is filtered by the filter element before entering the upper chamber. This method protects the vacuum generating assembly 700. The vacuum generating assembly 700 includes a vacuum pump, which can be a pneumatic vacuum pump that uses compressed air as a power source to generate a vacuum. In some specific embodiments, to clean the filter element, an opening is made at the top of the filter element. Pulse air is applied through this opening to shake off dust from the outside of the filter element. Preferably, the cleaning is done from the inside to the outside of the filter element to prevent dust from being blown into the deeper layers of the filter element.

[0055] In some specific embodiments, the negative pressure composite degassing and impurity removal aluminum melt purification equipment includes a parameter detection component and a control system. The parameter detection component includes a temperature measuring element and a liquid level measuring element. The liquid level measuring element is used to measure the liquid level of the aluminum melt in the tank 200, and the temperature measuring element is used to measure the temperature of the aluminum melt. The temperature measuring element includes, but is not limited to, thermocouples, resistance thermometers, and temperature transmitters. The liquid level measuring element includes, but is not limited to, radar level gauges. The drive components of the first rotor 210, the second rotor, the first heating assembly 400, the second heating assembly 500, the vacuum generating assembly 700, the parameter detection component, the first gate drive component 313, the second gate drive component 314, and the air supply assembly are all connected to the control system to achieve automatic control. Specifically, the control system is configured to receive the operating parameters detected by the parameter detection component and control the rotor, the first heating assembly 400, the second heating assembly 500, the dust removal assembly 600, the vacuum generating assembly 700, and the air supply assembly to execute corresponding control commands based on the operating parameters. The control commands include start / stop, speed adjustment, etc.

[0056] In some specific embodiments, the parameter detection component also includes a gate lifting height measuring element for detecting the lifting height of the second gate 312. The gate lifting height measuring element can be an absolute encoder, ultrasonic, radar ranging sensor, etc., and the specific type can be selected according to actual needs.

[0057] In some specific embodiments, such as Figure 1 As shown, the first heating component 400 includes an air duct 410, a fan 420, and a heater 430. Both the fan 420 and the heater 430 are located within the air duct 410. One end of the air duct 410 has an air inlet, and the other end connects to the bottom of the housing 200. At least one heater 430 is included, and the heater 430 may include, but is not limited to, resistance wires or silicon carbide heating rods. The specific type and quantity can be determined according to actual needs. The first heating component 400 connects to the bottom of the housing 200, and the second heating component 500 is located at the top of the housing 200. When preheating the housing 200, the first heating component 400 introduces hot air from the bottom of the housing 200, while the second heating component 500 heats from inside the housing 200. This ensures uniform heating of the housing 200 and accelerates the preheating rate.

[0058] In some specific embodiments, such as Figure 1 and Figure 3As shown, the control system includes an electrical control cabinet 800, an air duct 410 including an inlet air duct 411 and an outlet air duct 412, an inlet of a fan 420 connected to an inlet air duct 411, an outlet of a fan 420 connected to an outlet air duct 412, a heater 430 disposed in an outlet air duct 412, and a side wall of the electrical control cabinet 800 serving as an inlet air duct 411. This method simplifies the structure, and the inlet air duct 411 can cool the equipment in the electrical control cabinet 800, thus dissipating heat from the electrical control cabinet 800.

[0059] In some specific embodiments, such as Figure 1 As shown, the air outlet duct 412 is detachably connected to the housing 200, and the aluminum liquid outlet 230 is configured as the air outlet of the air outlet duct 412. In other words, the air outlet of the air outlet duct 412 is the aforementioned aluminum liquid outlet 230. When preheating of the housing 200 is required, the air outlet duct 412 is connected to the housing 200, and hot air enters the interior of the housing 200 through the aforementioned air outlet to heat the housing 200. After preheating, the air outlet duct 412 can be disassembled, allowing for the conveying of aluminum liquid and vacuum degassing operations.

[0060] Furthermore, in order to smoothly discharge the molten aluminum inside the housing 200, in some specific embodiments, an inclined channel 211 is provided at the bottom of the housing 200, which is connected to the molten aluminum outlet 230 to facilitate the discharge of molten aluminum.

[0061] Furthermore, such as Figure 1 As shown, the air outlet duct 412 includes a first air duct 4121 and a second air duct 4122 that are interconnected. The outlet of the fan 420 is connected to the first air duct 4121, and the second air duct 4122 is detachably connected to the housing 200. Specifically, it can be connected by snap-fit ​​or by connecting parts. The first air duct 4121 and the housing 200 can be detachably or non-detachably connected. The heater 430 can be installed in the first air duct 4121 or the second air duct 4122. The above methods can facilitate the installation and removal of the second air duct 4122.

[0062] In some specific embodiments, such as Figure 1 and 3 As shown, to facilitate the collection of waste residue generated during the vacuum degassing process of the housing 200, a waste residue collection component 900 is also included. The waste residue collection component 900 is connected to the housing 200, preferably in a detachable connection manner. Of course, the waste residue collection component 900 may also be not connected to the housing 200, but rather abut against the housing 200. The waste residue collection component 900 includes a waste residue collection trough, which is equipped with an inclined guide plate. The guide plate guides the waste residue into the waste residue collection trough. The bottom of the waste residue collection trough is equipped with wheels and a forklift slot to facilitate transportation of the collected waste residue to the waste residue collection point.

[0063] In some specific embodiments, the door of the housing 200 is located on the side, such as... Figure 1 As shown in the figure, the cabinet door is located at the rear of the cabinet body 200. The connection between the cabinet door and the cabinet body 200 includes, but is not limited to, a hinged connection. Ceramic fiber packing is used to seal the molten aluminum between the inner lining structure of the cabinet body 200 and the inner lining structure of the cabinet door, forming a sealed chamber to ensure that the molten aluminum does not leak. To further improve the sealing performance, a sealing groove is provided in the cabinet door, with a built-in high-temperature resistant silicone tube forming a sealed space between it and the cabinet body, ensuring the stability of the molten aluminum surface in a vacuum environment.

[0064] In some specific embodiments, such as Figure 1 As shown, the negative pressure composite degassing and impurity removal aluminum melt purification equipment includes a laser rangefinder 1000, which is connected to the housing 200 and used to measure the liquid level in the aluminum melt channel 300. The laser rangefinder 1000 is located above the aluminum melt channel 300 in the figure. Furthermore, a cooling medium pipeline is provided on the laser rangefinder 1000 to cool it. Specifically, when compressed air is used as the power source to generate a vacuum, compressed air can be used as the cooling medium. This method can extend the service life of the laser rangefinder 1000 and ensure its normal operation.

[0065] Taking compressed air as the power source as an example, the electrical control cabinet 800 includes a main cabinet, a pneumatic control cabinet is installed inside the main cabinet, and a vacuum generator and other equipment are installed inside the pneumatic control cabinet. Compressed air can be used to cool down the pneumatic control cabinet. A compressed air inlet pipe and a compressed air outlet pipe can be installed on the top of the pneumatic control cabinet.

[0066] The chamber 200 is equipped with a pressure measuring element to measure the gas pressure inside the chamber. The liquid level of the molten aluminum inside the chamber 200 can be calculated using this gas pressure. In this design, the chamber 200 may not be equipped with a liquid level measuring element.

[0067] Furthermore, this application also discloses a control method for a negative pressure composite degassing and impurity removal aluminum melt purification device. In other words, this application also discloses a purification method for a negative pressure composite degassing and impurity removal aluminum melt purification device, used in the aforementioned negative pressure composite degassing and impurity removal aluminum melt purification device, including the following steps:

[0068] Step S1: Preheat the chamber to 200°C;

[0069] The first heating element 400 and the second heating element 500 are activated to heat the chamber 200. When the temperature inside the chamber 200 reaches a preset temperature threshold, the first heating element 400 is stopped. It should be noted that the preset temperature threshold can be determined based on the temperature of the molten aluminum. Preferably, the preset temperature threshold is higher than the melting point of the molten aluminum. For example, if the temperature of the molten aluminum is 680℃-780℃, then the preset temperature threshold is 700℃-730℃. The activation, deactivation, and power adjustment of the second heating element 500 can be determined based on the temperature inside the chamber 200 to maintain the temperature within the aforementioned preset temperature threshold.

[0070] Specifically, the temperature measuring element transmits the measured temperature signal inside the housing 200 to the control system. The control system receives the temperature signal and compares it with a preset temperature threshold to issue control commands to the first heating component 400 and / or the second heating component 500. The control commands include starting and stopping the equipment and changing the heating power of the first heating component 400 and / or the second heating component 500.

[0071] Step S2: Convey molten aluminum;

[0072] First, the first gate 311 is opened and the second gate 312 is closed. When the control system detects that the temperature inside the housing 200 has reached a preset temperature threshold, it issues a command to shut down the first heating component 400. Simultaneously, commands are sent to the first gate drive 313 and the second gate drive 314 respectively. The first gate drive 313 drives the first gate 311 to rise to a preset position, separating it from the wall of the aluminum liquid channel 300, and the second gate drive 314 drives the second gate 312 to descend to abut against the wall of the aluminum liquid channel 300, and then the aluminum liquid is conveyed. Of course, the order of the commands to shut down the first heating component 400, the actions of the first gate drive 313, and the second gate drive 314 can be adjusted.

[0073] Step S3: Vacuum degassing;

[0074] The dust removal component 600 and the vacuum generating component 700 are started to evacuate the housing 200. At the same time, the first rotor and the second rotor are started to monitor the liquid level value of the housing 200. The liquid level value of the housing 200 is compared with the preset liquid level threshold. Based on the comparison result, the equipment control command corresponding to the threshold range to which the current liquid level belongs is executed.

[0075] Specifically, such as Figure 4As shown, when the liquid level in the chamber 200 reaches the first preset liquid level, the dust removal component 600 and the vacuum generating component 700 are activated to evacuate the chamber 200. The first preset liquid level can be determined based on the height of the aluminum liquid inlet 220 and the aluminum liquid outlet 230. The first preset liquid level needs to be higher than the height of the aluminum liquid inlet 220 and the aluminum liquid outlet 230 to ensure that sufficient gas phase space is formed between the liquid surface and the vacuum extraction port.

[0076] When the liquid level in tank 200 continues to rise to the second preset liquid level, adjust the rotor speed to the preset speed. The height of the second preset liquid level is greater than the height of the first preset liquid level. The preset rotor speed can be determined according to the flow rate of the aluminum liquid and process requirements. The second preset liquid level is determined based on the height of the rotor, ensuring that the aluminum liquid level completely covers the rotor or covers it to a certain height. At this point, adjust the rotor speed to the preset speed and start the inert gas conveying device to introduce inert gas. For example, the height of the second preset liquid level is usually 500mm-600mm. It should be noted that the above values ​​are the difference between the liquid level in tank 200 and the liquid level in aluminum liquid channel 300.

[0077] When the liquid level in the tank 200 continues to rise to the third preset liquid level, the first gate 311 is closed and the second gate 312 is activated. The height of the third preset liquid level is greater than the height of the second preset liquid level and higher than the height of the partition. The height of the third preset liquid level needs to ensure that there is enough top space between the upper part of the aluminum liquid surface and the top of the tank 200 to prevent aluminum liquid from splashing. At the same time, it needs to ensure that the rotor 210 is immersed in the liquid surface for a certain distance, while taking into account the residence time of the inert gas in the aluminum liquid. For example, the height range of the third preset liquid level is 945 mm - 955 mm. For example, the height of the third preset liquid level can be 945 mm, 946 mm, 947 mm, 948 mm, 949 mm, 950 mm, 951 mm, 952 mm, 953 mm, 954 mm, or 955 mm. It should be noted that the above values ​​are the difference between the liquid level in the tank 200 and the liquid level in the aluminum liquid channel 300.

[0078] Furthermore, when the control system detects that the liquid level in the tank 200 is higher than the fourth preset liquid level, the control system triggers a high liquid level alarm. The height of the fourth preset liquid level is greater than the height of the third preset liquid level. The fourth preset liquid level can be determined based on the aluminum liquid reaching a critical height that may cause overflow, splashing, or interference with the degassing effect. Preferably, the fourth preset liquid level is about 50 mm higher than the third preset liquid level. When the control system detects that the liquid level in the tank 200 is lower than the fifth preset liquid level, the control system triggers a low liquid level alarm. The height of the fifth preset liquid level is less than the height of the third preset liquid level. The fifth preset liquid level can be determined based on the aluminum liquid level falling to a critical height that may cause equipment damage, process failure, or safety accidents. Preferably, the fifth preset liquid level is about 50 mm lower than the third preset liquid level. When the aluminum liquid level rises to the sixth preset liquid level, the system stops operating. The sixth preset liquid level is determined based on the bottom height of the heating element of the second heating component 500.

[0079] In some specific embodiments, in addition to triggering an alarm, the control system will also issue interlocking commands, mainly including issuing commands to the rotor drive to stop running, thereby stopping the rotor and preventing rotor damage, and issuing commands to the inert gas supply component to shut down the inert gas supply component, thereby preventing inert gas short circuits and waste.

[0080] The negative pressure composite degassing and impurity removal aluminum melt purification equipment control method disclosed in this application realizes full-process automatic control, which can ensure that parameters such as vacuum degree, rotor speed, inert gas flow rate, and processing time are consistent for each aluminum melt treatment, reducing product quality fluctuations caused by human operation; the segmented linkage control of vacuum degree, rotor speed, and inert gas flow rate can improve the removal rate of hydrogen and impurities; it can improve production efficiency, enhance system stability and safety, and reduce the occurrence of safety accidents.

[0081] Taking an aluminum alloy casting production line as an example, the chamber 200 is preheated to 660℃-700℃, the molten aluminum enters the chamber 200 at a flow rate of 5L / s, the vacuum degree of the chamber 200 is maintained at about 80kPa, the rotation speed of the rotor 210 is increased from 130rpm to 690rpm, the flow rate of the inert gas is 120L / min, and the temperature fluctuation of the molten aluminum outlet is ≤5℃. It can be seen that the temperature fluctuation of the molten aluminum outlet is small, which can improve the quality of the cast aluminum products.

[0082] It should be noted that the various embodiments in this specification mainly describe the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other.

[0083] The terminology used in the above embodiments is for the purpose of describing specific embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions "a," "an," "the," "the," "the," and "this" are intended to also include expressions such as "one or more," unless the context clearly indicates otherwise. It should also be understood that in the embodiments of this application, "one or more" refers to one, two, or more; "and / or" describes the relationship between related objects, indicating that three relationships may exist; for example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0084] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0085] The "multiple" mentioned in the embodiments of this application refers to two or more. It should be noted that in the description of the embodiments of this application, terms such as "first" and "second" are used only for the purpose of distinguishing descriptions and should not be construed as indicating or implying relative importance, nor should they be construed as indicating or implying order.

[0086] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0087] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A negative pressure composite degassing and impurity removal aluminum melt purification device, characterized in that, It includes a housing (200) and a heating mechanism, the heating mechanism including a first heating component (400) and a second heating component (500), the first heating component (400) being disposed outside the housing (200) to deliver hot air to the housing (200), and the second heating component (500) being disposed inside the housing (200).

2. The negative pressure composite degassing and impurity removal aluminum melt purification equipment as described in claim 1, characterized in that, The enclosure (200) includes an enclosure body and an inner lining structure disposed on the inner wall of the enclosure body. The second heating assembly (500) includes a first heating structure disposed inside the inner lining structure. The first heating structure includes at least one first heating element.

3. The negative pressure composite degassing and impurity removal aluminum melt purification equipment as described in claim 2, characterized in that, The second heating assembly (500) further includes a second heating structure (510), which is disposed on the top of the housing (200).

4. The negative pressure composite degassing and impurity removal aluminum melt purification equipment as described in claim 1, characterized in that, The housing (200) is provided with a partition, which divides the housing (200) into a first chamber and a second chamber that are connected to each other. The first chamber is provided with a first rotor (210), and the second chamber is provided with a second rotor.

5. The negative pressure composite degassing and impurity removal aluminum melt purification equipment as described in claim 4, characterized in that, The outer side of the housing (200) is provided with an aluminum liquid channel (300). The housing (200) has an aluminum liquid inlet (220) and an aluminum liquid outlet (230). The aluminum liquid inlet (220) is connected to the aluminum liquid channel (300) and the first chamber, respectively. The aluminum liquid outlet (230) is connected to the aluminum liquid channel (300) and the second chamber, respectively.

6. The negative pressure composite degassing and impurity removal aluminum melt purification equipment as described in claim 5, characterized in that, The aluminum liquid channel (300) is provided with a gate assembly (310), which includes a first gate (311) and a second gate (312). The first gate (311) and the second gate (312) are vertically and vertically disposed in the aluminum liquid channel (300). Along the aluminum liquid conveying direction, the first gate (311) is disposed downstream of the aluminum liquid inlet (220), and the second gate (312) is disposed downstream of the aluminum liquid outlet (230).

7. The negative pressure composite degassing and impurity removal aluminum melt purification equipment as described in claim 6, characterized in that, The negative pressure composite degassing and impurity removal aluminum melt purification equipment includes a vacuuming mechanism, which includes a dust removal component (600) and a vacuum generating component (700). The dust removal component (600) is connected to the housing (200); the vacuum generating component (700) is connected to the dust removal component (600) to evacuate the housing (200).

8. The negative pressure composite degassing and impurity removal aluminum melt purification equipment as described in claim 7, characterized in that, The negative pressure composite degassing and impurity removal aluminum melt purification equipment includes a parameter detection component and a control system. The parameter detection component includes a temperature measuring element and a liquid level measuring element. The liquid level measuring element is used to measure the liquid level of the aluminum melt in the tank (200), and the temperature measuring element is used to measure the temperature of the aluminum melt. The gate assembly (310) includes a first gate drive (313) and a second gate drive (314). The first gate drive (313) can drive the first gate (311) to rise and fall, and the second gate drive (314) can drive the second gate (312) to rise and fall. The drive unit of the first rotor (210), the drive unit of the second rotor, the first heating assembly (400), the second heating assembly (500), the vacuum generating assembly (700), the parameter detection assembly, the first gate drive unit (313), and the second gate drive unit (314) are all connected to the control system.

9. The negative pressure composite degassing and impurity removal aluminum melt purification equipment as described in claim 8, characterized in that, The first heating component (400) includes an air duct (410), a fan (420), and a heater (430). The fan (420) and the heater (430) are both disposed in the air duct (410). One end of the air duct (410) is provided with an air inlet, and the other end is connected to the bottom of the housing (200). The heater (430) includes at least one. The control system includes an electrical control cabinet (800), the air duct (410) includes an air inlet duct (411) and an air outlet duct (412), the inlet of the fan (420) is connected to the air inlet duct (411), the outlet of the fan (420) is connected to the air outlet duct (412), the heater (430) is disposed in the air outlet duct (412), and the side wall of the electrical control cabinet (800) serves as the air inlet duct (411).

10. The negative pressure composite degassing and impurity removal aluminum melt purification equipment as described in claim 9, characterized in that, The air outlet duct (412) is detachably connected to the housing (200), and the aluminum liquid outlet (230) is configured as the air outlet of the air outlet duct (412).

11. A control method for a negative pressure composite degassing and impurity removal aluminum melt purification device, used in the negative pressure composite degassing and impurity removal aluminum melt purification device as described in any one of claims 1-10, comprising the steps of: Preheat the chamber (200), start the first heating component (400) and the second heating component (500) to heat the chamber (200), and stop the first heating component (400) when the temperature inside the chamber (200) reaches the preset temperature threshold. Liquid aluminum is conveyed to the box (200) through the liquid aluminum channel (300); Vacuum degassing: start the dust removal component (600) and vacuum generating component (700) to evacuate the housing (200). At the same time, start the first rotor and the second rotor, monitor the liquid level value of the housing (200), compare the liquid level value of the housing (200) with the preset liquid level, and execute the equipment control command corresponding to the threshold range to which the current liquid level belongs based on the comparison result.

12. The control method for the negative pressure composite degassing and impurity removal aluminum melt purification equipment as described in claim 11, characterized in that, In the vacuum degassing step: When the liquid level in the housing (200) reaches the first preset liquid level, the dust removal component (600) and the vacuum generating component (700) are activated. When the liquid level in the tank (200) rises to the second preset liquid level, the rotation speed of the rotor is adjusted to the preset rotation speed, and the height of the second preset liquid level is greater than the height of the first preset liquid level; When the liquid level in the tank (200) rises to the third preset liquid level, the first gate (311) is closed and the second gate (312) is activated. The height of the third preset liquid level is greater than the height of the second preset liquid level.

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