Metal liquid level electromagnetic slag removal heat insulation shell

Abstract

The utility model relates to a metal liquid level electromagnetic slag-driving heat-insulating shell which is located outside a traveling wave magnetic field generator, the traveling wave magnetic field generator is located above a metal molten pool, the metal liquid level electromagnetic slag-driving heat-insulating shell comprises a vacuum shell, the vacuum shell is a sandwich plate with a gap in the middle, and a shell body below the metal liquid level electromagnetic slag-driving heat-insulating shell is the vacuum shell; a gap in the middle of the vacuum shell is a vacuum layer, an extraction opening is formed in the inner wall of the vacuum shell, one end of the extraction opening is communicated with the vacuum layer, the other end of the extraction opening is connected with a vacuum pump, a valve is arranged between the vacuum pump and the extraction opening, and the extraction opening is communicated with the valve through an exhaust pipe. The sealing pipeline is detachably connected with the vacuum pump and the valve; a plurality of air inlet pipes and a plurality of air outlet pipes are arranged on a lateral shell body of the metal liquid level electromagnetic slag removal heat insulation shell, and the air inlet pipes and the air outlet pipes are connected with an external fan. Compared with the prior art, the utility model has the advantages of simple structure, good thermal radiation isolation effect, flexible design and use and the like.

Description

Technical Field

[0001] This utility model relates to the technical field of hot-dip galvanizing equipment, and in particular to an electromagnetic slag-driving and heat-insulating shell for a liquid metal surface. Background Technology

[0002] Continuous hot-dip galvanizing (GI, GA), hot-dip galvanized aluminum-magnesium, and hot-dip aluminized silicon are important technologies for steel corrosion protection. After continuous annealing, the strip steel enters the molten metal pool through the furnace nose for hot-dip galvanizing. This process involves a series of intermetallic chemical reactions and the generation of slag. The presence of this slag significantly affects the quality of the strip steel coating and can even severely hinder production. Taking continuous hot-dip galvanizing of strip steel as an example, the steel base (Fe element) on the strip steel surface undergoes a complex chemical reaction with the Zn and Al elements in the zinc pot, generating zinc slag. Based on the distribution of zinc slag in the zinc pot, it can be divided into three categories: surface slag, suspended slag, and bottom slag. Among them, surface slag, due to its lower density, floats on the surface of the molten zinc and easily flows with the zinc liquid, readily contacting the strip steel surface and forming zinc slag defects. Therefore, to effectively remove the floating slag on the surface of the molten metal, domestic metallurgists have successively proposed electromagnetic slag removal technology. This involves installing multiple electromagnetic slag removal devices above the molten metal pool, and under the synergistic effect of these devices, achieving the purpose of directional removal of floating slag from the molten metal surface.

[0003] Although electromagnetic slag removal devices are widely used in hot-dip galvanizing, their temperature rises due to the constant exposure to high-temperature molten metal pools. The heat radiated by the molten metal causes the device to overheat, and the device itself also generates heat, further increasing its temperature. Currently, a common method to reduce the temperature is to blow a certain amount of cold air inside the device and control the airflow to increase heat dissipation. However, the amount of heat removed by air cooling is limited. In practical applications, overheating damage is still frequent, significantly reducing the device's lifespan. Comparative analysis shows that the radiative heat transfer of the molten metal is approximately three times the heat induced by the device itself. Therefore, reducing the radiative heat transfer of the molten metal to improve the lifespan of electromagnetic slag removal devices has become a pressing technical problem in the hot-dip galvanizing field. Utility Model Content

[0004] The purpose of this invention is to overcome the defects of the existing technology by providing a heat-insulating shell for electromagnetic slag removal on a molten metal surface, which solves the problem of easy damage to the electromagnetic slag removal device caused by the heat radiation of the high-temperature molten metal pool, thereby improving the service life of the electromagnetic slag removal device.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] This utility model provides a metal liquid surface electromagnetic slag removal and heat insulation shell, located outside a traveling wave magnetic field generator, which is located above the molten metal pool. It includes a vacuum shell, which is a sandwich plate with a gap in the middle. The shell below the metal liquid surface electromagnetic slag removal and heat insulation shell is a vacuum shell.

[0007] The gap in the middle of the vacuum shell is the vacuum layer. The inner wall of the vacuum shell is equipped with an air extraction port. One end of the air extraction port is connected to the vacuum layer, and the other end is connected to a vacuum pump. A valve is provided between the vacuum pump and the air extraction port. The air extraction port and the valve are connected through an exhaust pipe. The vacuum pump and the valve are connected through a sealed pipe. The connection between the sealed pipe and the vacuum pump and the valve is detachable.

[0008] The side shell of the electromagnetic slag drive heat insulation shell for liquid metal is equipped with multiple air inlet pipes and multiple air outlet pipes, which are connected to an external fan.

[0009] Furthermore, multiple lifting flanges are provided on the upper shell of the electromagnetic slag removal and heat insulation shell for the molten metal surface. The lifting flanges are connected to the traveling wave magnetic field generator through screws. The traveling wave magnetic field generator and the electromagnetic slag removal and heat insulation shell for the molten metal surface are installed above the molten metal pool through the lifting flanges.

[0010] Furthermore, it also includes a standard outer shell, which is a solid plate, and the vacuum outer shell is fixedly connected to the standard outer shell using sealing screws.

[0011] Furthermore, both the outer side of the vacuum casing and the inner side of the ordinary casing are coated with insulating varnish.

[0012] Furthermore, both the vacuum casing and the regular casing are made of alloy steel, and both are 5mm thick.

[0013] Furthermore, the thickness of the vacuum layer is 1–10 mm, and the pressure is 0.1–100 Pa.

[0014] Furthermore, the number of vacuum shells is 1 to 6.

[0015] Furthermore, the diameter of the air extraction port is 1 to 10 mm, and the number of air extraction ports is 1 to 10.

[0016] Furthermore, the valve is a vacuum valve or an explosion-proof valve.

[0017] Furthermore, the vacuum pump is either a hydraulic vacuum pump or a rotary vane vacuum pump.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1. This utility model features a vacuum shell outside the traveling wave magnetic field generator. The connection between the vacuum shell and the vacuum pump is achieved through a vacuum layer, an air extraction port, a valve, and a vacuum pump passage. The vacuum pump creates a vacuum layer inside the vacuum shell that can isolate heat radiation by drawing a vacuum and connecting the valve and the vacuum pump through a detachable sealed pipe. The device has a simple structure, is easy to manufacture, and can effectively reduce the heat radiation from the high-temperature molten metal pool to the electromagnetic slag removal equipment. While ensuring a good slag removal effect, it also plays a good role in heat insulation, enhances the stability of equipment operation, and improves the service life of the equipment.

[0020] 2. The number and arrangement of the vacuum shell, air extraction port and lifting flange in this utility model can be designed according to actual working needs, so as to adapt to different working conditions and heat insulation requirements.

[0021] 3. This utility model has an air inlet pipe and an air outlet pipe on the outer shell that connect to an external fan, which can blow a certain amount of cold air into the slag remover and increase heat dissipation by controlling the air volume. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view along the transverse section line of an electromagnetic slag-driving heat insulation shell for a liquid metal surface according to Embodiment 1 of this utility model.

[0023] Figure 2 This is a sectional view along the longitudinal section line of an electromagnetic slag-driving heat insulation shell for a liquid metal surface according to Embodiment 1 of this utility model.

[0024] Figure 3 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0025] Figure 4 This is a cross-sectional view along the transverse section line of an electromagnetic slag-driving heat insulation shell for a liquid metal surface according to Embodiment 2 of this utility model.

[0026] Figure 5 This is a schematic diagram of the overall structure of Embodiment 2 of this utility model.

[0027] In the diagram: 1. Traveling wave magnetic field generator, 2. Ordinary outer casing, 3. Vacuum outer casing, 4. Vacuum layer, 5. Air extraction port, 6. Exhaust pipe, 7. Valve, 8. Sealing pipe, 9. Vacuum pump, 10. Air inlet pipe, 11. Air outlet pipe, 12. Lifting flange, 13. Sealing screw, 14. Molten metal pool. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present utility model.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] This invention provides a heat-insulating shell for electromagnetic slag removal on a molten metal surface. The shell, consisting of a vacuum shell 3 and a standard shell 2, is fitted over a traveling wave magnetic field generator 1 and is fixedly connected to the vacuum shell 3 and the standard shell 2 using sealing screws 13. The standard shell 2 is a solid plate, while the vacuum shell 3 is a sandwich panel with a gap in the middle. The lower part of the heat-insulating shell facing the molten metal pool 14 is the vacuum shell 3, used to insulate against the thermal radiation generated by the molten metal pool 14.

[0032] Specifically, the gap in the middle of the vacuum shell 3 is a vacuum layer 4. An air extraction port 5 is provided on the inner wall of the vacuum shell 3, and a vacuum pump 9 is provided outside the device. The vacuum layer 4 and the vacuum pump 9 are connected sequentially through the air extraction port 5, a valve 7, an exhaust pipe 6, and a sealed pipe 8. When the vacuum pump 9 is working, it removes the air from the vacuum layer 4, thus achieving the heat insulation function of the vacuum shell 3. The thickness of the vacuum layer 4 is 1–10 mm, preferably 10 mm, and the pressure is 0.1–100 Pa. As a preferred embodiment, the connection between the sealed pipe 8 and the vacuum pump 9 and the valve 7 is detachable. When the valve 7 is closed and the sealed pipe 8 is removed from the passage, the connection between the vacuum pump 9 and the vacuum layer 4 is broken, and the vacuum shell 3 maintains a vacuum state with heat insulation effect.

[0033] Specifically, the number of vacuum shells 3 is 1 to 6. Except for the shell facing the molten metal pool 14 at the bottom, which is a vacuum shell 3, the other surfaces can be either vacuum shells 3 or ordinary shells 2, depending on actual working requirements. Both vacuum shells 3 and ordinary shells 2 are made of alloy steel and have a thickness of 5 mm. The diameter of the extraction port 5 is 1 to 10 mm, preferably 5 mm, and the number of extraction ports 5 can be set from 1 to 10 depending on the specific number of vacuum shells 3 and actual working requirements.

[0034] As a preferred embodiment, the outer side of the vacuum housing 3 and the inner side of the ordinary housing 2 are both coated with insulating varnish. The valve 7 can be a vacuum valve or an explosion-proof valve, and the vacuum pump 9 can be a hydraulic vacuum pump or a rotary vane vacuum pump.

[0035] As a preferred embodiment, the outer casing of the traveling wave magnetic field generator 1 on the horizontal side is provided with multiple air inlet pipes 10 and multiple air outlet pipes 11. The air inlet pipes 10 and air outlet pipes 11 are connected to an external fan to realize air circulation and heat exchange between the traveling wave magnetic field generator 1 and the outside. In particular, the heat dissipation intensity can be adjusted by controlling the air volume of the external fan.

[0036] As a preferred embodiment, the shell above the electromagnetic slag removal and heat insulation shell for the molten metal surface is equipped with multiple lifting flanges 12. The specific number and arrangement of the lifting flanges 12 are determined according to actual working requirements. The lifting flanges 12 are connected to the traveling wave magnetic field generator 1 via screws. The traveling wave magnetic field generator 1 and the electromagnetic slag removal and heat insulation shell for the molten metal surface are installed above the molten metal pool 14 via the lifting flanges 12. As a preferred connection method, the lifting flanges 12 can be used in conjunction with external cantilever structures to suspend the device above the molten metal pool 14.

[0037] The working process of the device involved in this utility model is as follows: the air inside the vacuum shell 3 is removed by the vacuum pump 9 through the air extraction port 5. After the pressure inside the vacuum shell 3 tends to stabilize, the valve 7 is closed and the sealing pipe 8 is pulled out, so that a heat-insulating vacuum layer 4 is formed inside the vacuum shell 3, thereby reducing the heat radiation of the high-temperature molten metal pool 14 to the traveling wave magnetic field generator 1.

[0038] The specific implementation of this utility model will be described below through examples.

[0039] Example 1

[0040] See Figure 1 , Figure 2 and Figure 3A metal liquid surface electromagnetic slag driving and heat insulation shell is provided. A vacuum shell 3 is provided below the traveling wave magnetic field generator 1 and near the metal molten pool 14. The vacuum shell 3 is evacuated by a vacuum pump 9 to form a vacuum layer 4. The inner wall of the vacuum shell 3 is provided with an air extraction port 5. One end of the air extraction port 5 is connected to the vacuum layer 4 and the other end is connected to an exhaust pipe 6. A valve 7 is provided between the exhaust pipe 6 and the vacuum pump 9. The two ends of the vacuum shell 3 are fixedly connected to the outside of the ordinary shell 2 by several sealing screws 13. The outer side of the vacuum shell 3 and the inner side of the ordinary shell 2 are both sprayed with insulating paint. The right side of the ordinary shell 2 is provided with a set of air inlet pipes 10 and a set of air outlet pipes 11. The upper part of the ordinary shell 2 is provided with a set of lifting flanges 12.

[0041] In this embodiment, both the vacuum shell 3 and the ordinary shell 2 are made of alloy steel and have a thickness of 5mm.

[0042] In this embodiment, the vacuum housing 3 is located directly below the traveling wave magnetic field generator 1 and close to the molten metal pool 14. The thickness of the vacuum layer 4 inside the vacuum housing 3 is 10 mm.

[0043] In this embodiment, the inner wall of the vacuum housing 3 is provided with an air extraction port 5, the diameter of which is 5mm. One end of the exhaust pipe 6 is connected to the air extraction port 5, and the other end is sealed with a valve 7, which is an explosion-proof valve.

[0044] In this embodiment, valve 7 is connected to vacuum pump 9 via sealed pipe 8. Vacuum pump 9 evacuates the vacuum layer 4 to 10 Pa, then valve 7 is closed and sealed pipe 8 is pulled out, separating vacuum housing 3 from vacuum pump 9. As a preferred embodiment, vacuum pump 9 is an XD series rotary vane vacuum pump.

[0045] In this embodiment, one end of an air inlet pipe 10 and one end of an air outlet pipe 11 are connected to the inner wall of the ordinary outer casing 2, and the other end is connected to an external fan. The air inlet pipe 10 and the air outlet pipe 11 are located on the right side of the ordinary outer casing 2.

[0046] In this embodiment, a set of lifting flanges 12 are provided on the upper part of the ordinary outer shell 2. The lifting flanges 12 are connected to the traveling wave magnetic field generator 1 through a screw rod. With the help of an external cantilever structure device, the device is suspended and installed on the upper part of the molten metal pool 14.

[0047] In this embodiment, a vacuum shell 3 is applied below the traveling wave magnetic field generator 1, and a vacuum layer 4 is formed inside the vacuum shell 3 by vacuum pump 9. The structure is simple and easy to process, and it plays a good role in heat insulation during equipment operation.

[0048] Example 2

[0049] See Figure 4 and Figure 5A metal liquid surface electromagnetic slag driving and heat insulation shell is provided. Vacuum shells 3 are provided on the left, right and lower sides of the traveling wave magnetic field generator 1. The vacuum shells 3 are evacuated by the vacuum pump 9 to form a vacuum layer 4. The two ends of the vacuum shells 3 on the left and right sides are fixedly connected to the upper part of the ordinary shell 2 by several sealing screws 13. Two vacuum shells 3 are fixedly connected by several sealing screws 13. The outer side of each vacuum shell 3 and the inner side of the ordinary shell 2 are sprayed with insulating paint. Each vacuum shell 3 has an air extraction port 5 on its inner wall. One end of the air extraction port 5 is connected to the vacuum layer 4 and the other end is connected to the exhaust pipe 6. A valve 7 is provided between the exhaust pipe 6 and the vacuum pump 9. A set of air inlet pipes 10 and a set of air outlet pipes 11 are provided on the right vacuum shell 3. A set of lifting flanges 12 are provided on the upper part of the ordinary shell 2.

[0050] In this embodiment, the thickness of the three vacuum shells 3 is 5mm, the thickness of the ordinary shell 2 is 5mm, and the material of both is alloy steel.

[0051] In this embodiment, the three vacuum shells 3 are located on the left, right and directly below the traveling wave magnetic field generator 1, respectively, close to the molten metal pool 14. The thickness of the vacuum layer 4 inside each vacuum shell 3 is 10 mm.

[0052] In this embodiment, each of the three vacuum housings 3 has an air extraction port 5 on its inner wall. Each air extraction port 5 is connected to the corresponding vacuum layer 4. Each air extraction port 5 has a diameter of 5mm. One end of each exhaust pipe 6 is connected to the air extraction port 5, and the other end is sealed with a valve 7. All valves 7 are explosion-proof valves.

[0053] In this embodiment, valve 7 is connected to vacuum pump 9 via sealed pipe 8. Vacuum pump 9 evacuates the three vacuum layers 4 to 10 Pa, then valve 7 is closed to seal each layer, and the corresponding sealed pipe 8 is disconnected. In a preferred embodiment, vacuum pump 9 is an XD series rotary vane vacuum pump.

[0054] In this embodiment, a set of air inlet pipes 10 and a set of air outlet pipes 11 both penetrate the vacuum housing 3 and are connected to an external fan. The air inlet pipes 10 and the air outlet pipes 11 are located on the right side of the vacuum housing 3.

[0055] In this embodiment, a set of lifting flanges 12 are provided on the upper part of the ordinary outer shell 2. The lifting flanges 12 are connected to the traveling wave magnetic field generator 1 through a screw rod. With the help of an external cantilever structure device, the device is suspended and installed on the upper part of the molten metal pool 14.

[0056] In this embodiment, vacuum shells 3 are applied to the left, right and bottom sides of the traveling wave magnetic field generator 1. A vacuum layer 4 is formed inside each vacuum shell 3 by vacuum pump 9. Its structure is simple and easy to process, which greatly reduces the heat radiation of the high temperature metal pool 14 to the equipment.

[0057] In summary, this utility model is a heat-insulating shell for electromagnetic slag removal on a molten metal surface. A vacuum shell 3 is provided outside the traveling wave magnetic field generator 1. A vacuum layer 4 is formed inside the vacuum shell by a vacuum pump 9. Its structure is simple and easy to process. It can effectively reduce the heat radiation of the high-temperature molten metal pool 14 to the electromagnetic slag removal equipment. While ensuring a good slag removal effect, it also plays a good role in heat insulation, enhances the stability of equipment operation, and improves the service life of the equipment.

[0058] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A metal liquid surface electromagnetic slag removal and heat insulation shell, located outside a traveling wave magnetic field generator (1), the traveling wave magnetic field generator (1) being located above a molten metal pool (14), characterized in that, Includes a vacuum shell (3), which is a sandwich panel with a gap in the middle, and the shell below the metal liquid surface electromagnetic slag driving heat insulation shell is the vacuum shell (3); The gap in the middle of the vacuum shell (3) is a vacuum layer (4). The inner wall of the vacuum shell (3) is provided with an air extraction port (5). One end of the air extraction port (5) is connected to the vacuum layer (4), and the other end is connected to a vacuum pump (9). A valve (7) is provided between the vacuum pump (9) and the air extraction port (5). The air extraction port (5) and the valve (7) are connected through an exhaust pipe (6). The vacuum pump (9) and the valve (7) are connected through a sealed pipe (8). The connection between the sealed pipe (8) and the vacuum pump (9) and the valve (7) is a detachable connection. The side shell of the electromagnetic slag driving heat insulation shell for the liquid metal surface is provided with multiple air inlet pipes (10) and multiple air outlet pipes (11), and the air inlet pipes (10) and air outlet pipes (11) are connected to an external fan.

2. The electromagnetic slag removal and heat insulation shell for liquid metal as described in claim 1, characterized in that, The upper shell of the electromagnetic slag removal and heat insulation shell for the molten metal surface is provided with multiple lifting flanges (12). The lifting flanges (12) are connected to the traveling wave magnetic field generator (1) through screws. The traveling wave magnetic field generator (1) and the electromagnetic slag removal and heat insulation shell for the molten metal surface are installed above the molten metal pool (14) through the lifting flanges (12).

3. The electromagnetic slag removal and heat insulation shell for liquid metal as described in claim 1, characterized in that, It also includes a regular outer shell (2), which is a solid plate, and the vacuum outer shell (3) is fixedly connected to the regular outer shell (2) by sealing screws (13).

4. The electromagnetic slag removal and heat insulation shell for liquid metal surface according to claim 3, characterized in that, The outer side of the vacuum housing (3) and the inner side of the ordinary housing (2) are both coated with insulating varnish.

5. The electromagnetic slag removal and heat insulation shell for liquid metal as described in claim 3, characterized in that, Both the vacuum shell (3) and the ordinary shell (2) are made of alloy steel and have a thickness of 5mm.

6. The electromagnetic slag removal and heat insulation shell for a liquid metal surface according to claim 1, characterized in that, The thickness of the vacuum layer (4) is 1 to 10 mm, and the pressure is 0.1 to 100 Pa.

7. The electromagnetic slag removal and heat insulation shell for liquid metal as described in claim 1, characterized in that, The number of vacuum shells (3) is 1 to 6.

8. The electromagnetic slag removal and heat insulation shell for liquid metal surface according to claim 1, characterized in that, The diameter of the air extraction port (5) is 1 to 10 mm, and the number of air extraction ports (5) is 1 to 10.

9. The electromagnetic slag removal and heat insulation shell for liquid metal surface according to claim 1, characterized in that, The valve (7) is a vacuum valve or an explosion-proof valve.

10. The electromagnetic slag removal and heat insulation shell for liquid metal as described in claim 1, characterized in that, The vacuum pump (9) is a hydraulic vacuum pump or a rotary vane vacuum pump.

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