Small aluminum alloy smelting device with degassing function

Abstract

The utility model discloses a small aluminum alloy smelting device with a degassing function, and relates to the technical field of metal smelting. The problems that an existing aluminum alloy smelting device cannot accurately control the temperature of molten aluminum, so that the molten aluminum is burnt out or slagging is generated, and the aluminum alloy casting quality is poor are solved. After the materials are loaded, the electric heating wire is controlled through measurement of a furnace gas galvanic couple in the early stage, so that the graphite crucible in the sealing barrel is heated; after the aluminum ingot is melted, the molten aluminum temperature measuring galvanic couple is inserted, the heating mode is switched to molten aluminum temperature control, and accurate control over the molten aluminum temperature is achieved. And the molten aluminum can be completely melted within four hours, so that the casting requirement is met. The melting furnace cover can be manually opened at any time to meet the operation requirements of feeding and slagging-off. Argon is input through the gas guide pipe in the argon protection input port in the movable furnace cover, oxidation slagging and burning loss in the aluminum industry are reduced, and therefore the casting quality of aluminum alloy is improved. The aluminum alloy smelting furnace is suitable for aluminum alloy smelting.

Description

Technical Field

[0001] This utility model relates to the field of metal smelting technology, specifically to a small aluminum alloy smelting device with degassing function. Background Technology

[0002] In the aluminum industry, the hydrogen content and metallic inclusions in molten aluminum alloys in the foundry severely affect the quality of castings. Typically, during the solidification process, as the solubility of hydrogen decreases, hydrogen gas cannot escape from the solution in time, and metallic inclusions cannot float to the surface before crystallization. This leads to problems such as white spots, increased pinholes, and decreased mechanical properties on the aluminum alloy ingot surface during subsequent casting processes, ultimately resulting in product scrap. Product scrap stems from the inability of traditional techniques to control the hydrogen content in the molten aluminum. Therefore, reducing the hydrogen content in the molten aluminum can reduce ingot scrap.

[0003] In summary, existing aluminum alloy smelting equipment cannot precisely control the temperature of molten aluminum, which leads to aluminum loss or slagging, resulting in poor aluminum alloy casting quality. Utility Model Content

[0004] This invention addresses the problem that existing aluminum alloy smelting devices cannot accurately control the temperature of molten aluminum, leading to aluminum burn-out or slag formation, and consequently, poor aluminum alloy casting quality. It proposes a small aluminum alloy smelting device with degassing function.

[0005] This utility model discloses a small aluminum alloy melting device with degassing function, which comprises a degassing motor 1, an aluminum liquid temperature measuring thermocouple 3, a movable furnace cover 4, a high temperature resistant sealing strip 5, an electric heating wire 6, a graphite crucible 7, a liquid level sensor 8, a flow channel vertical filter 9, a high liquid level alarm interlock 10, a furnace cover manual translation rod unit 11, a hydraulic tilting support rod 12, a sealing barrel 13, and a flow guide channel 14.

[0006] The sealed container 13 is fixedly connected to the ground via a tilting frame, and the sealed container 13 is hinged to the top of the tilting frame. Inside the sealed container 13 is a graphite crucible 7. n electric heating wires 6, where n is a positive integer, are evenly arranged circumferentially between the outer surface of the graphite crucible 7 and the inner wall of the sealed container 13. A movable furnace lid 4 is located at the top opening of the sealed container 13. A high-temperature resistant sealing strip 5 is located at the circumferential edge of the lower surface of the movable furnace lid 4. A degassing motor 1 is located at the center of the upper surface of the movable furnace lid 4. An aluminum liquid temperature measuring coupler 3 is located at one end of the lower surface of the movable furnace lid 4. A manual shift rod unit 11 for the furnace cover is provided at the top edge of the sealed barrel 13. The output end of the manual shift rod unit 11 is hinged to the movable furnace cover 4. A guide channel 14 is provided on one side of the tilting frame. The guide channel 14 is fixedly connected to the ground through the frame. A high liquid level alarm interlock 10 is provided at one end of the guide channel 14. A vertical filter 9 is provided inside the guide channel 14. A liquid level sensor 8 is provided above the guide channel 14. The middle of the outer surface of the sealed barrel 13 is hinged to the output end of the hydraulic tilting support rod 12. The bottom end of the hydraulic tilting support rod 12 is hinged to the ground.

[0007] Furthermore, an argon gas protection input port 2 is machined on one side of the aluminum liquid temperature measuring coupler 3 on the movable furnace cover 4;

[0008] Furthermore, the manual translation rod unit 11 of the furnace cover includes a power rod, a vertical rod, and a pulling rod; the bottom end of the vertical rod is fixedly connected to the upper surface of the sealing barrel 13, a quarter of the power rod is hinged to the top end of the vertical rod, one end of the power rod is hinged to one end of the pulling rod, and the other end of the pulling rod is hinged to the outer surface of the movable furnace cover 4.

[0009] Furthermore, the number n of the electric heating wires 6 is 2≤n≤5;

[0010] Furthermore, the output end of the degassing motor 1 passes through the movable furnace cover 4 and is connected to the top of the stirring rod.

[0011] Furthermore, a gas guide pipe is inserted inside the argon gas protection input port 2 on the movable furnace cover 4;

[0012] Furthermore, the vertical filter element 9 of the flow channel is a 30-mesh ceramic filter element;

[0013] Furthermore, during use, the sealed container 13 is in a horizontal position, and the degassing motor 1 and the aluminum melt temperature measuring coupler 3 are removed. After the material is loaded, the heating wire 6 is controlled by measuring the furnace gas temperature using the furnace gas coupler, thereby heating the graphite crucible 7 inside the sealed container 13. After the aluminum ingot melts, the aluminum melt temperature measuring coupler 3 is inserted, and the heating mode is switched to aluminum melt temperature control. This ensures that the aluminum melt temperature does not overheat and that it melts completely within four hours, meeting casting requirements. The melting furnace lid can be manually opened at any time to meet the requirements of material feeding and slag removal operations. When the aluminum melt temperature is high, argon gas is introduced through the gas pipe inside the argon gas protection input port 2 on the movable furnace lid 4 for gas protection, and the gas pressure is stabilized at 0.05 kPa, reducing aluminum oxidation slag formation and burn-off.

[0014] After the composition test is passed, the next step of aluminum liquid degassing is carried out. The preheated degassing motor 1 is inserted into the hole in the middle of the movable furnace cover 4. A high-purity argon gas source is connected, the gas inlet pressure and pulse frequency are adjusted, and the rotation speed of the degassing motor 1 is set through the frequency converter for 15 to 25 minutes of degassing operation.

[0015] After degassing, a tilting speed curve is set according to the required flow rate of the molten aluminum. Due to different furnace loading volumes, manual tilting can be performed quickly until liquid flows out, and then switched to automatic tilting after meeting the liquid level requirements. The container has a rotation axis and a tilting edge, and the container can rotate around the rotation axis, allowing the fluid inside the container to flow out from the tilting edge. The area of ​​the cross-section of the container cavity obtained by cutting it with any plane passing through the tilting edge is as follows, thereby obtaining the equipment flow control parameters; at the same time, the liquid level sensor 8 above the guide channel 14 feeds back a signal to the degassing motor 1, which can reduce or pause the tilting. The molten aluminum passes through the vertical filter 9 of the flow channel and is directly poured onto the casting platform. The guide channel 14 needs to be baked to the working temperature before use and covered with an insulated cover.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] This invention overcomes the shortcomings of existing technologies. Before use, the sealed container is in a horizontal position, and the degassing motor and aluminum melt temperature measuring coupler are removed. After the material is loaded, the heating wire is controlled by measuring the furnace gas temperature using a furnace gas coupler, thereby heating the graphite crucible inside the sealed container. After the aluminum ingot melts, the aluminum melt temperature measuring coupler is inserted, and the heating method is switched to aluminum melt temperature control, achieving precise control of the aluminum melt temperature. This ensures that the aluminum melt temperature does not overheat and that it melts completely within four hours, meeting casting requirements. The melting furnace lid can be manually opened at any time to meet the requirements of material feeding and slag removal operations. When the aluminum melt temperature is high, argon gas is introduced through the gas pipe inside the argon gas protection input port on the movable furnace lid for gas protection, stabilizing the gas pressure at 0.05 kPa, reducing aluminum oxidation, slag formation, and burn-off, thereby improving the casting quality of the aluminum alloy. Attached Figure Description

[0018] Figure 1 This is a main sectional view of a small aluminum alloy smelting device with degassing function as described in this utility model;

[0019] Figure 2 This is a flowchart illustrating the use of a small aluminum alloy smelting device with degassing function as described in this utility model.

[0020] Figure 3 This is a schematic diagram of the liquid level when the graphite crucible is tilted during use of a small aluminum alloy melting device with degassing function as described in this utility model.

[0021] Figure 4 This is a statistical chart of the pouring flow rate of a small aluminum alloy smelting device with degassing function under operating conditions, as described in this utility model. Detailed Implementation

[0022] Specific implementation method one: Combining Figures 1 to 4 This embodiment describes a small aluminum alloy melting device with degassing function, which comprises a degassing motor 1, an aluminum liquid temperature measuring coupler 3, a movable furnace cover 4, a high-temperature resistant sealing strip 5, an electric heating wire 6, a graphite crucible 7, a liquid level sensor 8, a flow channel vertical filter 9, a high liquid level alarm interlock 10, a furnace cover manual translation rod unit 11, a hydraulic tilting support rod 12, a sealing barrel 13, and a flow guide channel 14.

[0023] The sealed container 13 is fixedly connected to the ground via a tilting frame, and the sealed container 13 is hinged to the top of the tilting frame. Inside the sealed container 13 is a graphite crucible 7. n electric heating wires 6, where n is a positive integer, are evenly arranged circumferentially between the outer surface of the graphite crucible 7 and the inner wall of the sealed container 13. A movable furnace lid 4 is located at the top opening of the sealed container 13. A high-temperature resistant sealing strip 5 is located at the circumferential edge of the lower surface of the movable furnace lid 4. A degassing motor 1 is located at the center of the upper surface of the movable furnace lid 4. An aluminum liquid temperature measuring coupler 3 is located at one end of the lower surface of the movable furnace lid 4. A manual shift rod unit 11 for the furnace cover is provided at the top edge of the sealed barrel 13. The output end of the manual shift rod unit 11 is hinged to the movable furnace cover 4. A guide channel 14 is provided on one side of the tilting frame. The guide channel 14 is fixedly connected to the ground through the frame. A high liquid level alarm interlock 10 is provided at one end of the guide channel 14. A vertical filter 9 is provided inside the guide channel 14. A liquid level sensor 8 is provided above the guide channel 14. The middle of the outer surface of the sealed barrel 13 is hinged to the output end of the hydraulic tilting support rod 12. The bottom end of the hydraulic tilting support rod 12 is hinged to the ground.

[0024] In this specific embodiment, during use, the sealed container 13 is in a horizontal position, and the degassing motor 1 and the aluminum liquid temperature measuring coupler 3 are removed. After the material is loaded, the heating wire 6 is controlled by measuring the furnace gas coupler, thereby heating the graphite crucible 7 inside the sealed container 13. After the aluminum ingot melts, the aluminum liquid temperature measuring coupler 3 is inserted, and the heating mode is switched to aluminum liquid temperature control. This ensures that the aluminum liquid temperature does not overheat and that it can be completely melted within four hours to meet casting requirements. The melting furnace lid can be manually opened at any time to meet the requirements of material feeding and slag removal operations. When the aluminum liquid temperature is high, argon gas is introduced through the gas guide pipe inside the argon gas protection input port 2 on the movable furnace lid 4 for gas protection, and the gas pressure is stabilized at 0.05 kPa to reduce aluminum oxidation slag formation and burn-off.

[0025] After the composition test is passed, the next step of aluminum liquid degassing is carried out. The preheated degassing motor 1 is inserted into the hole in the middle of the movable furnace cover 4. A high-purity argon gas source is connected, the gas inlet pressure and pulse frequency are adjusted, and the rotation speed of the degassing motor 1 is set through the frequency converter for 15 to 25 minutes of degassing operation.

[0026] After degassing, a tilting speed curve is set according to the required flow rate of the molten aluminum. Due to different furnace loading volumes, manual tilting can be performed quickly until liquid flows out, and then switched to automatic tilting after meeting the liquid level requirements. The container has a rotation axis and a tilting edge, and the container can rotate around the rotation axis, allowing the fluid inside the container to flow out from the tilting edge. The area of ​​the cross-section of the container cavity obtained by cutting it with any plane passing through the tilting edge is as follows, thereby obtaining the equipment flow control parameters; at the same time, the liquid level sensor 8 above the guide channel 14 feeds back a signal to the degassing motor 1, which can reduce or pause the tilting. The molten aluminum passes through the vertical filter 9 of the flow channel and is directly poured onto the casting platform. The guide channel 14 needs to be baked to the working temperature before use and covered with an insulated cover.

[0027] Specific Implementation Method Two: Combining Figures 1 to 4 This embodiment further defines the smelting apparatus described in Specific Embodiment 1. This embodiment describes a small aluminum alloy smelting apparatus with degassing function, wherein an argon gas protection input port 2 is machined next to the aluminum liquid temperature measuring thermocouple 3 on the movable furnace cover 4.

[0028] Specific implementation method three: Combining Figures 1 to 4This embodiment further defines the smelting apparatus described in Specific Embodiment 1. This embodiment describes a small aluminum alloy smelting apparatus with degassing function. The manual translation rod unit 11 of the furnace cover includes a power rod, a vertical rod, and a pulling rod. The bottom end of the vertical rod is fixedly connected to the upper surface of the sealing barrel 13. One-quarter of the power rod is hinged to the top end of the vertical rod. One end of the power rod is hinged to one end of the pulling rod. The other end of the pulling rod is hinged to the outer surface of the movable furnace cover 4.

[0029] Specific implementation method four: Combination Figures 1 to 4 This embodiment further defines the smelting apparatus described in Specific Embodiment 1. In this embodiment, a small aluminum alloy smelting apparatus with degassing function is provided, wherein the number n of the electric heating wires 6 is 2≤n≤5.

[0030] Specific Implementation Method Five: Combining Figures 1 to 4 This embodiment further defines the smelting apparatus described in Specific Embodiment 1. In this embodiment, a small aluminum alloy smelting apparatus with degassing function is provided, wherein the output end of the degassing motor 1 passes through the movable furnace cover 4 and is connected to the top of the stirring rod.

[0031] Specific Implementation Method Six: Combination Figures 1 to 4 This embodiment further defines the smelting apparatus described in Specific Embodiment Two. The small aluminum alloy smelting apparatus with degassing function described in this embodiment has a gas guide pipe inserted inside the argon gas protection input port 2 on the movable furnace cover 4.

[0032] Specific implementation method seven: Combining Figures 1 to 4 This embodiment further defines the smelting apparatus described in Specific Embodiment 1. The small aluminum alloy smelting apparatus with degassing function described in this embodiment uses a 30-mesh ceramic filter 9 for the flow channel vertical filter plate 9.

[0033] Working principle

[0034] During use, the sealed container 13 is in a horizontal position, and the degassing motor 1 and the aluminum melt temperature measuring coupler 3 are removed. After the material is loaded, the heating wire 6 is controlled by measuring the furnace gas temperature using the furnace gas coupler, thereby heating the graphite crucible 7 inside the sealed container 13. After the aluminum ingot melts, the aluminum melt temperature measuring coupler 3 is inserted, and the heating mode is switched to aluminum melt temperature control. This ensures that the aluminum melt temperature does not overheat and that it melts completely within four hours, meeting casting requirements. The melting furnace lid can be manually opened at any time to meet the requirements of material feeding and slag removal operations. When the aluminum melt temperature is high, argon gas is introduced through the gas guide pipe inside the argon gas protection input port 2 on the movable furnace lid 4 for gas protection, and the gas pressure is stabilized at 0.05 kPa to reduce aluminum oxidation, slag formation, and burn-off.

[0035] After the composition test is passed, the next step of aluminum liquid degassing is carried out. The preheated degassing motor 1 is inserted into the hole in the middle of the movable furnace cover 4. A high-purity argon gas source is connected, the gas inlet pressure and pulse frequency are adjusted, and the rotation speed of the degassing motor 1 is set through the frequency converter for 15 to 25 minutes of degassing operation.

[0036] After degassing, a tilting speed curve is set according to the required flow rate of the molten aluminum. Due to different furnace loading volumes, manual tilting can be performed quickly until liquid flows out, and then switched to automatic tilting after meeting the liquid level requirements. The container has a rotation axis and a tilting edge, and the container can rotate around the rotation axis, allowing the fluid inside the container to flow out from the tilting edge. The area of ​​the cross-section of the container cavity obtained by cutting it with any plane passing through the tilting edge is as follows, thereby obtaining the equipment flow control parameters; at the same time, the liquid level sensor 8 above the guide channel 14 feeds back a signal to the degassing motor 1, which can reduce or pause the tilting. The molten aluminum passes through the vertical filter 9 of the flow channel and is directly poured onto the casting platform. The guide channel 14 needs to be baked to the working temperature before use and covered with an insulated cover.

Claims

1. A small aluminum alloy smelting device with degassing function, characterized in that: It includes a degassing motor (1), an aluminum liquid temperature measuring coupler (3), a movable furnace cover (4), a high-temperature resistant sealing strip (5), an electric heating wire (6), a graphite crucible (7), a liquid level sensor (8), a flow channel vertical filter (9), a high liquid level alarm interlock (10), a furnace cover manual translation rod unit (11), a hydraulic tilting support rod (12), a sealing barrel (13), and a flow guide channel (14); The sealed barrel (13) is fixedly connected to the ground via a tilting frame, and the sealed barrel (13) is hinged to the top of the tilting frame. A graphite crucible (7) is installed inside the sealed barrel (13). n electric heating wires (6) are evenly arranged circumferentially between the outer surface of the graphite crucible (7) and the inner wall of the sealed barrel (13), where n is a positive integer. A movable furnace cover (4) is installed at the top opening of the sealed barrel (13). A high-temperature resistant sealing strip (5) is installed at the circumferential edge of the lower surface of the movable furnace cover (4). A degassing motor (1) is installed at the center of the upper surface of the movable furnace cover (4). An aluminum liquid temperature measuring coupler (3) is installed at one end of the lower surface of the movable furnace cover (4). A manual sliding rod unit (11) for the furnace cover is provided at the top edge of the sealed barrel (13). The output end of the manual sliding rod unit (11) for the furnace cover is hinged to the movable furnace cover (4). A guide channel (14) is provided on one side of the tilting frame. The guide channel (14) is fixedly connected to the ground through the frame. A high liquid level alarm interlock (10) is provided at one end of the guide channel (14). A vertical filter plate (9) for the flow channel is provided inside the guide channel (14). A liquid level sensor (8) is provided above the guide channel (14). The middle part of the outer surface of the sealed barrel (13) is hinged to the output end of the hydraulic tilting support rod (12). The bottom end of the hydraulic tilting support rod (12) is hinged to the ground.

2. The small aluminum alloy smelting device with degassing function according to claim 1, characterized in that: An argon gas protection inlet (2) is machined on one side of the aluminum liquid temperature measuring coupler (3) on the movable furnace cover (4).

3. A small aluminum alloy smelting device with degassing function according to claim 1, characterized in that: The manual translation rod unit (11) of the furnace cover includes a power rod, a vertical rod and a pulling rod; the bottom end of the vertical rod is fixedly connected to the upper surface of the sealing barrel (13), the quarter of the power rod is hinged to the top of the vertical rod, one end of the power rod is hinged to one end of the pulling rod, and the other end of the pulling rod is hinged to the outer surface of the movable furnace cover (4).

4. A small aluminum alloy smelting device with degassing function according to claim 1, characterized in that: The number of electric heating wires (6) is n, where 2 ≤ n ≤ 5.

5. A small aluminum alloy smelting device with degassing function according to claim 1, characterized in that: The output end of the degassing motor (1) passes through the movable furnace cover (4) and is connected to the top of the stirring rod.

6. A small aluminum alloy smelting device with degassing function according to claim 2, characterized in that: The movable furnace cover (4) has an argon gas protection inlet (2) with a gas guide pipe inserted inside.

7. A small aluminum alloy smelting device with degassing function according to claim 1, characterized in that: The vertical filter plate (9) with flow channel is a 30-mesh ceramic filter plate.

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