Smelting device for aluminum-zinc alloy processing

Abstract

The invention provides a smelting device for aluminum-zinc alloy machining, and relates to the technical field of smelting, the smelting device comprises a smelting furnace body, and further comprises a furnace cover, a composite heating system, a double-layer different-direction stirring system and a center auxiliary heating mechanism, the furnace cover is arranged above the smelting furnace body and is in sealing fit with the smelting furnace body, and a feeding port with a cover plate is formed in the furnace cover; the composite heating system heats and smelts materials in the smelting furnace body in a composite mode of bottom heating and side heat preservation, and the double-layer different-direction stirring system is arranged on the smelting furnace body and the furnace cover and provides two convection circulation rings from bottom to top and from top to bottom so as to mix smelting liquid. The center auxiliary heating mechanism is heated by the composite heating system and conveys hot air to the center position of the smelting furnace body through the double-layer different-direction stirring system. According to the smelting device for aluminum-zinc alloy machining, a composite heating system and a double-layer different-direction stirring system are utilized, uniform heating and stirring are achieved, and the smelting quality is guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of smelting technology, specifically, it relates to a smelting apparatus for processing aluminum-zinc alloys. Background Technology

[0002] Aluminum-zinc alloys are widely used in the automotive, aerospace, and precision machinery industries due to their excellent strength, wear resistance, and casting properties. Common smelting equipment includes medium-frequency furnaces, resistance furnaces, and flame furnaces. During the smelting process, pre-treated raw materials are added to the smelting device in proportion and heated above the melting point. After the metal is completely melted, other processing operations are carried out. The core challenge of the smelting process lies in the huge differences in elemental properties. Zinc has a significantly higher density than aluminum and is prone to gravity segregation in the liquid state, resulting in uneven composition in the molten pool. Traditional smelting furnaces generally use top single-shaft stirring and side wall heating, which results in weak stirring force and difficulty in effectively driving the high-density zinc liquid at the bottom to rise and form a "zinc-rich layer at the bottom". Side wall heating can easily cause local overheating (near the furnace wall) and local low temperature (center and bottom) in the molten pool, which aggravates compositional segregation and leads to unstable composition of the casting. It is difficult to overcome the performance fluctuation caused by density segregation. Summary of the Invention

[0003] The purpose of this invention is to provide a smelting apparatus for aluminum-zinc alloy processing, which solves the technical problem in related technologies where top single-shaft stirring and side wall heating easily lead to component segregation and affect the quality of castings.

[0004] At least one embodiment of the present invention provides a smelting apparatus for processing aluminum-zinc alloys, including a smelting furnace body, and further comprising: A furnace cover is disposed above the smelting furnace body and is sealed to the smelting furnace body. The furnace cover is provided with a feed inlet with a cover plate. A composite heating system, wherein the composite heating system adopts a combined mode of bottom heating and side insulation to heat and melt the materials inside the melting furnace; A dual-layer counter-current stirring system, wherein the dual-layer counter-current stirring system is disposed on the smelting furnace body and the furnace cover, providing two convection circulation loops from bottom to top and from top to bottom for mixing the molten material, the dual-layer counter-current stirring system comprising: Upper stirring module, wherein the upper stirring module is disposed on the furnace cover to form a liquid flow from top to bottom, the upper stirring module comprising: The main stirring shaft is rotatably mounted on the furnace cover, and a propeller blade is fixedly installed at the bottom end of the main stirring shaft. The rotation direction of the propeller blade is downward pressing. A lower stirring module, disposed at the bottom of the melting furnace body to form an upward liquid flow, the lower stirring module comprising: A secondary stirring shaft is rotatably mounted on the inner bottom wall of the smelting furnace body. A spiral auger agitator is fixedly installed on the outside of the secondary stirring shaft, and the spiral auger agitator rotates in an upward direction. A linkage rotation mechanism, used to achieve synchronous rotation of the upper stirring module and the lower stirring module, the linkage rotation mechanism comprising: A synchronizing rod is fixedly installed at the top of the auxiliary stirring shaft, and a sliding groove matching the synchronizing rod is provided on the main stirring shaft; A central auxiliary heating mechanism, heated by the composite heating system and supplied with hot gas to the center of the melting furnace body via the double-layer counter-directional stirring system, the central auxiliary heating mechanism comprising: The air supply seat has a hollow structure, the main stirring shaft and the air supply seat are rotatably connected, and the main stirring shaft is provided with an air outlet. A heating tube is disposed inside the side wall of the smelting furnace body. The heating tube is connected to the gas supply seat, and an air inlet is provided at the end of the heating tube.

[0005] To further improve the stirring effect, the main stirring shaft can be raised and lowered on the melting furnace body to adjust the height of the propeller blades in the molten liquid.

[0006] To prevent damage caused by excessive gas pressure inside the smelting furnace, an exhaust pipe is installed on the furnace cover, and an on / off valve is installed on the exhaust pipe. A gas pressure sensor is installed on the furnace cover to detect the gas pressure inside the smelting furnace and control the opening and closing degree of the on / off valve.

[0007] To enable the opening and closing of the furnace cover, a drive block is fixedly fitted onto the outside of the main stirring shaft. The drive block can drive the furnace cover to rise. The smelting furnace body is equipped with a locking device for locking the furnace cover. The locking device includes: A locking plate is fixedly connected to the furnace cover, and the locking plate is in contact with the top end of the smelting furnace body; A locking seat is slidably disposed on the melting furnace body, and the locking seat has a locking groove that matches the locking plate.

[0008] The beneficial effects of this invention are as follows: 1. Compared with the prior art, the smelting device for aluminum-zinc alloy processing provided in this embodiment of the invention generates a downward axial flow through the upper stirring module, pushing the top aluminum liquid to the bottom, and the zinc-rich liquid flow at the bottom is strongly stirred up by the lower stirring module and transported to the middle and upper part, forming two powerful convection circulation rings in the smelting furnace body, which shortens the homogenization mixing time and solves the problem of gravity segregation.

[0009] 2. Compared with the prior art, the smelting device for aluminum-zinc alloy processing provided in this embodiment of the invention generates heat convection from bottom to top through bottom heating, actively assisting in the fight against segregation, and achieves more uniform heat field through side insulation to ensure precise temperature control. Furthermore, the inert gas transported by the heating tube is heated by the composite heating system and transported to the inside of the main stirring shaft. The gas is then sent to the center of the smelting furnace through the gas outlet to assist in heating the molten liquid inside, further improving the heating uniformity of the solution.

[0010] 3. Compared with the prior art, the smelting apparatus for aluminum-zinc alloy processing provided in this embodiment of the invention can not only provide auxiliary heating to the center of the smelting furnace by conveying heated inert gas into the furnace body, but also allow the bubbles to enter the interior of the molten liquid and perform pneumatic stirring, further improving the mixing uniformity of the molten liquid. Furthermore, the gas entering the interior of the smelting furnace body, in conjunction with the opening and closing valve to regulate the opening and closing of the exhaust pipe, can keep the interior of the smelting furnace body in a slightly positive pressure environment, reducing the volatilization rate of zinc and reducing the loss of zinc resources.

[0011] 4. Compared with the prior art, the smelting device for aluminum-zinc alloy processing provided in this embodiment of the invention can adjust the height of the propeller blades by raising and lowering the main stirring shaft, so as to agitate the molten liquid at different depths. At the same time, the inert gas discharged from the gas outlet moves with the main stirring shaft to blow gas to the molten liquid at different positions, further improving the uniformity of mixing and heating. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention, 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the overall structure of a smelting apparatus for processing aluminum-zinc alloys provided in an embodiment of the present invention; Figure 2 This is an embodiment of the present invention. Figure 1 A schematic diagram of the structure in partial cross-section; Figure 3 This is an embodiment of the present invention. Figure 1 A schematic diagram of the double-layer counter-directional stirring system and the central auxiliary heating mechanism; Figure 4 This is an embodiment of the present invention. Figure 1 A schematic diagram of the structure of the middle drive block, the air outlet, and the upper stirring module; Figure 5 This is an embodiment of the present invention. Figure 1A schematic diagram of the middle and lower layer stirring module and the linkage rotation mechanism; Figure 6 This is an embodiment of the present invention. Figure 1 Schematic diagram of the structure of the melting furnace body and the limiting ring; Figure 7 This is an embodiment of the present invention. Figure 1 A schematic diagram of the structure of the furnace cover, feed inlet, exhaust pipe, and on / off valve; Figure 8 This is an embodiment of the present invention. Figure 2 A magnified schematic diagram of the local structure at point A; Figure 9 This is an embodiment of the present invention. Figure 3 A magnified schematic diagram of the structure at point B in the middle.

[0014] In the picture: 1. Smelting furnace body; 2. Furnace cover; 3. Feed inlet; 4. Exhaust pipe; 5. Opening and closing valve; 6. Pressure sensor; 7. Drive block; 101. Main stirring shaft; 102. Electric cylinder; 103. Lifting frame; 104. Propeller blade; 201. Auxiliary stirring shaft; 202. Spiral auger agitator; 203. Drive chamber; 204. Motor; 301. Synchronizing rod; 401. Air supply seat; 402. Heating tube; 403. Air outlet; 501. Locking plate; 502. Locking seat; 503. Limiting ring. Detailed Implementation The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure. For ease of understanding, the English abbreviations and related technical terms involved in the embodiments of this disclosure will be explained and described below.

[0015] It should be understood that the described embodiments are merely some, not all, of the embodiments disclosed herein. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without inventive effort are within the scope of protection of this disclosure.

[0016] The terminology used in the embodiments of this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The singular forms “a,” “the,” and “the” as used in the embodiments of this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0017] It should be understood that the term "and / or" used in this article is merely a way of describing the logical relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0018] Depending on the context, the word "if" as used here can be interpreted as "when" or "when" or "in response to determination" or "in response to detection." Similarly, depending on the context, the phrase "if determination" or "if detection (of the stated condition or event)" can be interpreted as "when determination" or "in response to determination" or "when detection (of the stated condition or event)" or "in response to detection (of the stated condition or event)."

[0019] It should be understood that the terms "first," "second," etc., used in this disclosure are for distinguishing purposes only and should not be construed as indicating or implying relative importance or order.

[0020] In the description of this disclosure, the terms “center,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and should not be construed as a limitation of this disclosure.

[0021] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation", "connection" and "joining" should be interpreted broadly, for example, they can be fixed connections, detachable connections, mating connections or integral connections; those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0022] like Figures 1 to 9 As shown, it illustrates a smelting apparatus for aluminum-zinc alloy processing in one embodiment of the present invention, including a smelting furnace body 1, a furnace cover 2, a composite heating system, a double-layer counter-directional stirring system, and a central auxiliary heating mechanism.

[0023] like Figures 1 to 7 As shown, the furnace cover 2 is located above the smelting furnace body 1 and is sealed to the smelting furnace body 1. The furnace cover 2 is provided with a feed port 3 with a cover plate. The feed port 3 can be opened and closed by the cover plate. The cover plate is provided with a lock to lock and fix the cover plate and the feed port 3. The pre-treated raw materials can be fed into the smelting furnace body 1 in proportion through the feed port 3.

[0024] like Figures 1 to 6 As shown, the composite heating system uses a combination of bottom heating and side insulation to heat and melt the materials inside the smelting furnace 1. Bottom heating can be achieved using electromagnetic induction heating, while side insulation can be achieved using electric heating elements installed on the side walls of the smelting furnace 1. Electromagnetic induction heating is a non-contact heating technology based on Faraday's law of electromagnetic induction and the Joule heating effect. When an alternating current passes through an induction coil, an alternating magnetic field is generated in the space around it. This alternating magnetic field induces eddy currents in the conductor material (smelting raw material). When the eddy currents flow inside the material, Joule heating is generated due to the resistance, thereby heating the material. The electric heating element uses electricity as a heat source and has high heat resistance and high temperature strength to convert electrical energy into heat energy, heating and insulating the metal inside the smelting furnace. By combining bottom heating and side insulation, compared with the side heating method in the prior art, the temperature difference between the bottom and side walls of the smelting furnace 1 is reduced, and the uniformity of metal heating is increased.

[0025] like Figures 1 to 9As shown, a double-layer counter-directional stirring system is installed on the furnace body 1 and the furnace cover 2, providing two convection circulation loops from bottom to top and from top to bottom to mix the molten material. The double-layer counter-directional stirring system includes an upper stirring module, a lower stirring module, and a linkage rotation mechanism. The upper stirring module is installed on the furnace cover 2 to form a liquid flow from top to bottom. The upper stirring module includes a main stirring shaft 101, which is rotatably mounted on the furnace cover 2. The main stirring shaft 101 is also vertically adjustable on the furnace body 1 to adjust the height of the propeller blades 104 in the molten material. An electric cylinder 102 is installed on the furnace body 1, and the output of the electric cylinder 102... A lifting frame 103 is fixedly installed at one end of the furnace body 1. The main stirring shaft 101 is rotatably mounted on the lifting frame 103. A through hole is provided on the furnace cover 2 for the main stirring shaft 101 to pass through. A propeller blade 104 is fixedly installed at the bottom end of the main stirring shaft 101. The rotation direction of the propeller blade 104 is downward pressing. The lower stirring module is set at the bottom of the smelting furnace body 1 to form a liquid flow from bottom to top. The lower stirring module includes a secondary stirring shaft 201, which is rotatably set on the inner bottom wall of the smelting furnace body 1. A spiral auger agitator 202 is fixedly installed on the outside of the secondary stirring shaft 201. The rotation direction of the spiral auger agitator 202 is upward. A drive chamber 203 is fixedly connected inside body 1. A motor 204 is installed inside drive chamber 203. A secondary stirring shaft 201 is fixedly installed at the output end of motor 204. A linkage rotation mechanism is used to realize the synchronous rotation of the upper and lower stirring modules. The linkage rotation mechanism includes a synchronization rod 301, which is fixedly installed at the top of the secondary stirring shaft 201. A sliding groove matching the synchronization rod 301 is opened on the main stirring shaft 101. The motor 204 can drive the secondary stirring shaft 201 and the spiral agitator 202 to rotate. Under the sliding cooperation of the synchronization rod 301 and the main stirring shaft 101, the secondary stirring shaft 201... 01 The main stirring shaft 101 can be rotated by the synchronizing rod 301. At the same time, the lifting and lowering of the main stirring shaft 101 can drive the propeller blade 104 to move up and down inside the molten liquid, which can agitate the molten liquid at different heights. The spiral auger agitator 202 at the bottom of the molten furnace body 1 forms an upward liquid flow, causing the zinc liquid with higher density at the bottom to rise, while the propeller blade 104 at the top forms a downward liquid flow, causing the aluminum liquid with lower density at the top to fall. The collision of the two liquid flows improves the mixing effect of the molten liquid. The synchronizing rod 301 can be a polygonal column, which is easy to insert into the inside of the chute, and can drive the main stirring shaft 101 to rotate.

[0026] like Figures 1 to 9As shown, the central auxiliary heating mechanism is heated by the composite heating system and delivers hot gas to the center of the melting furnace body 1 through a double-layer counter-directional stirring system. The central auxiliary heating mechanism includes a gas supply seat 401 and a heating tube 402. The main stirring shaft 101 is a hollow structure, and the main stirring shaft 101 and the gas supply seat 401 are rotatably connected. An air outlet 403 is provided on the main stirring shaft 101, and an air supply chamber is provided inside the main stirring shaft 101. The gas supply seat 401 and the air outlet 403 are both connected to the air supply chamber. The heating tube 402 is installed inside the side wall of the melting furnace body 1. The heating tube 402 is connected to the gas supply seat 401 via a telescopic hose. An air inlet is located at the end of the heating tube 402 and is connected to an external gas supply device, such as an argon storage tank. Inert gas is supplied to the interior of the heating tube 402 through the external gas supply device. The heating tube 402 is spirally arranged inside the side wall of the melting furnace body 1. The inert gas inside the heating tube 402 is heated by a composite heating system, especially side resistance insulation. The heated inert gas enters the interior of the main stirring shaft 101 and enters the molten liquid through the air outlet 403. Bubbles are formed in the furnace body. A one-way valve can be installed at the outlet 403 to allow inert gas to enter the furnace body 1 in one direction, preventing the molten metal from flowing back into the main stirring shaft 101. The extension and retraction of the flexible hose can accommodate the raising and lowering of the gas supply seat 401 and the main stirring shaft 101. The outlet 403 is located slightly higher than the propeller blade 104 and remains inside the furnace body 1 throughout the raising and lowering process with the main stirring shaft 101. The entry of heated inert gas can improve the heating effect on the molten metal in the center of the furnace body 1, further enhancing the furnace body's thermal efficiency. The process improves the heating uniformity of the molten liquid, while the introduction of air bubbles provides a pneumatic stirring effect, further enhancing the mixing effect of the molten liquid. At the same time, the introduction of inert gas creates a positive pressure environment inside the molten furnace 1. Zinc has a low boiling point (907℃) and already has a high vapor pressure at conventional molten temperatures, leading to zinc element loss and uncontrolled alloy composition. The positive pressure environment generated by the introduced inert gas significantly reduces the volatilization rate of zinc, ensuring compositional stability. Meanwhile, argon bubbles can adsorb hydrogen and inclusions floating in the molten furnace 1, playing a role in degassing and refining.

[0027] like Figures 1 to 7 As shown, to prevent damage caused by excessive gas pressure inside the smelting furnace 1, an exhaust pipe 4 is installed on the furnace cover 2, and an on / off valve 5 is installed on the exhaust pipe 4. A gas pressure sensor 6 is installed on the furnace cover 2 to detect the gas pressure inside the smelting furnace 1 and control the opening and closing degree of the on / off valve 5. The gas pressure sensor 6 monitors the gas pressure inside the smelting furnace 1, so that the gas pressure inside the smelting furnace 1 is slightly higher than atmospheric pressure, forming a slightly positive pressure environment, which achieves the aforementioned effect of reducing zinc volatilization. The gas pressure sensor 6 transmits an electrical signal to the processor. When the processor senses an increase in gas pressure, it controls the on / off valve 5 to open or increase the opening degree, so that excess gas is discharged, ensuring the gas pressure inside the smelting furnace 1 is stable, thereby ensuring the stable progress of smelting and preventing damage caused by excessive gas pressure in the smelting furnace 1.

[0028] like Figures 1 to 9 As shown, to achieve the opening and closing of the furnace cover 2, a drive block 7 is fixedly mounted on the outside of the main stirring shaft 101. The drive block 7 can drive the furnace cover 2 to rise. A locking component for locking the furnace cover 2 is provided on the smelting furnace body 1. The locking component includes a locking plate 501 and a locking seat 502. The locking plate 501 is fixedly connected to the furnace cover 2 and contacts the top of the smelting furnace body 1. The locking seat 502 is slidably mounted on the smelting furnace body 1 via a slider. A locking groove matching the locking plate 501 is provided on the 02. A limiting ring 503 is fixedly connected to the inner wall of the smelting furnace body 1. The bottom end of the furnace cover 2 contacts the limiting ring 503. When the top end of the furnace cover 2 and the limiting ring 503 are pressed together, the top end of the locking plate 501 and the top end of the smelting furnace body 1 are pressed together. By sliding the locking seat 502 closer to the locking plate 501, the locking plate 501 can be inserted into the locking groove. The locking plate 501 is locked by the locking seat 502 and the smelting furnace body 1. 1. Limiting is achieved by using a limiting ring 503 to support and limit the furnace cover 2, ensuring its stability. A high-temperature resistant sealing ring is fixedly connected to the outside of the furnace cover 2 to ensure the sealing between the furnace cover 2 and the smelting furnace body 1. The electric cylinder 102 can drive the main stirring shaft 101 to slide up and down along the through hole. At the same time, the main stirring shaft 101 can rotate within the through hole, realizing the lifting and stirring of the upper stirring module. The drive block 7 is located above the gas outlet 403. When the main stirring shaft 101 drives the propeller blade 104 to lift and lower, the drive block 7 is always below the furnace cover 2. When the furnace cover 2 needs to be opened, the sliding locking seat 502 is moved away from the locking plate 501. The electric cylinder 102 drives the main stirring shaft 101 to rise, so that the drive block 7 contacts the inner top wall of the furnace cover 2. The electric cylinder 102 continues to drive the main stirring shaft 101 to rise, which can lift the furnace cover 2 and open the furnace cover 2, allowing maintenance or cleaning operations to be performed inside the smelting furnace body 1.

[0029] The working principle or operating procedure of the smelting device used for aluminum-zinc alloy processing is as follows: The furnace cover 2 is installed above the smelting furnace body 1. The locking seat 502 locks the locking plate 501. The cover is opened and the pre-treated raw materials are added into the interior of the smelting furnace body 1 through the feed port 3. The initial main stirring shaft 101 drives the propeller blade 104 to be inside the furnace cover 2. The bottom electromagnetic induction heating and side resistance heating in the composite heating system heat the raw materials in the melting furnace 1 and melt them into a liquid state. The motor 204 drives the auxiliary stirring shaft 201 and the spiral auger agitator 202 to rotate to form an upward liquid flow. At the same time, the synchronizing rod 301 drives the main stirring shaft 101 and the propeller blade 104 to rotate to form a downward liquid flow. The collision and mixing of the two liquid flows improves the mixing effect of the aluminum-zinc smelting liquid and increases the liquid flow in the smelting furnace body 1, thereby improving the uniformity of heating. Electric cylinder 102 drives main stirring shaft 101 to move up and down to stir the molten liquid at different heights. External gas supply equipment delivers inert gas into the heating tube 402. Composite heating system heats the inert gas in heating tube 402 and delivers it into the main stirring shaft 101. It is then sent into the molten liquid through gas outlet 403. The heated inert gas assists in heating and stirring the molten liquid, while adsorbing and floating hydrogen and slag in the molten liquid. The opening and closing of valve 5 is controlled by pressure sensor 6 to keep the inside of the molten furnace 1 in a slightly positive pressure environment, reducing zinc volatilization. Adjust the temperature of the molten liquid to a suitable pouring range, then drain the molten liquid for pouring.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A smelting apparatus for processing aluminum-zinc alloys, comprising a smelting furnace body (1), characterized in that, Also includes: Furnace cover (2), the furnace cover (2) is located above the smelting furnace body (1) and is sealed to the smelting furnace body (1). The furnace cover (2) is provided with a feed inlet (3) with a cover plate. A composite heating system, wherein the composite heating system adopts a composite mode of bottom heating and side insulation to heat and melt the material in the melting furnace body (1); A double-layer counter-directional stirring system is provided on the smelting furnace body (1) and the furnace cover (2) to provide two convection circulation loops from bottom to top and from top to bottom for mixing the molten liquid; A central auxiliary heating mechanism is heated by the composite heating system and delivers hot gas to the center of the smelting furnace body (1) through the double-layer counter-stirring system.

2. The smelting apparatus for processing aluminum-zinc alloys according to claim 1, characterized in that, The dual-layer counter-directional stirring system includes: Upper stirring module, the upper stirring module is disposed on the furnace cover (2) to form a liquid flow from top to bottom; A lower stirring module is provided at the bottom of the smelting furnace body (1) to form a liquid flow from bottom to top; A linkage rotation mechanism is used to realize the synchronous rotation of the upper stirring module and the lower stirring module.

3. The smelting apparatus for processing aluminum-zinc alloys according to claim 2, characterized in that, The upper stirring module includes: The main stirring shaft (101) is rotatably mounted on the furnace cover (2). A propeller blade (104) is fixedly installed at the bottom end of the main stirring shaft (101). The rotation direction of the propeller blade (104) is downward pressing.

4. The smelting apparatus for processing aluminum-zinc alloys according to claim 3, characterized in that, The lower-level stirring module includes: A secondary stirring shaft (201) is rotatably mounted on the inner bottom wall of the smelting furnace body (1). A spiral auger agitator (202) is fixedly installed on the outside of the secondary stirring shaft (201). The spiral auger agitator (202) rotates upward.

5. The smelting apparatus for processing aluminum-zinc alloys according to claim 4, characterized in that, The linkage rotation mechanism includes: Synchronizing rod (301) is fixedly installed at the top of the auxiliary stirring shaft (201), and the main stirring shaft (101) has a groove that matches the synchronizing rod (301).

6. The smelting apparatus for processing aluminum-zinc alloys according to claim 3, characterized in that, The central auxiliary heating mechanism includes: The air supply seat (401) is hollow, the main stirring shaft (101) and the air supply seat (401) are rotatably connected, and the main stirring shaft (101) is provided with an air outlet (403). Heating tube (402) is located inside the side wall of the smelting furnace body (1). The heating tube (402) is connected to the gas supply seat (401). An air inlet is provided at the end of the heating tube (402).

7. The smelting apparatus for processing aluminum-zinc alloys according to claim 3, characterized in that, The main stirring shaft (101) can be raised and lowered on the smelting furnace body (1) to adjust the height of the propeller blade (104) in the molten liquid.

8. The smelting apparatus for processing aluminum-zinc alloys according to claim 1, characterized in that, The furnace cover (2) is provided with an exhaust pipe (4), the exhaust pipe (4) is equipped with an on / off valve (5), and the furnace cover (2) is equipped with a pressure sensor (6) for detecting the gas pressure inside the smelting furnace body (1) and controlling the opening and closing degree of the on / off valve (5).

9. A smelting apparatus for processing aluminum-zinc alloys according to claim 7, characterized in that, The main stirring shaft (101) is externally fixed with a drive block (7), which can drive the furnace cover (2) to rise. The smelting furnace body (1) is provided with a locking component for locking the furnace cover (2).

10. A smelting apparatus for processing aluminum-zinc alloys according to claim 9, characterized in that, The locking element includes: Locking plate (501), the locking plate (501) and the furnace cover (2) are fixedly connected, and the locking plate (501) is in contact with the top of the smelting furnace body (1); Locking seat (502), which is slidably disposed on the smelting furnace body (1), and the locking seat (502) has a locking groove that matches the locking plate (501).

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