Dynamic electromagnetic bottom slag driving device in hot dipping process

Abstract

The utility model relates to a dynamic electromagnetic bottom slag driving device in a hot dipping process. The dynamic electromagnetic bottom slag driving device comprises a magnetic field generator, a heat insulation shell, a connecting rod and an external moving part, the magnetic field generator is arranged in the heat insulation shell and fixedly connected through the connecting rod, and the top of the connecting rod is connected with an external moving part and used for adjusting the position of the magnetic field generator in the metal molten pool. The magnetic field generator comprises a magnet yoke and a coil, the magnet yoke is distributed in a circumferential extension mode, a rotating magnetic field is generated by applying alternating current to the coil, and molten metal is driven to drive bottom slag to move; therefore, the purpose of removing the bottom slag in the hot dipping process is achieved. An air inlet pipe, an air outlet pipe and a wire arranging pipe are arranged in the connecting rod and used for cooling and power supply. Compared with the prior art, the bottom slag removing device can effectively remove bottom slag accumulated in the hot dipping process so as to reduce the frequency of stopping for slag salvaging and further improve the production efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of hot-dip galvanizing equipment, and in particular to a dynamic electromagnetic drive bottom slag device for hot-dip galvanizing process. Background Technology

[0002] Continuous hot-dip galvanizing (GI, GA), hot-dip zinc aluminate (AZ), hot-dip zinc aluminum magnesium (ZAM), and hot-dip silicon aluminate (AS) 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. Taking continuous hot-dip galvanizing of strip steel as an example, the steel base (Fe element) on the surface of the strip steel reacts chemically with the Zn and Al elements in the zinc pot to generate zinc slag. Based on the density difference, zinc slag can be divided into three categories: surface slag, suspended slag, and bottom slag. In the unsteady zinc molten pool under industrial production conditions, suspended slag dynamically transforms into bottom slag or surface slag under the action of its own gravity, thermal buoyancy, and the flow field driven by the three rollers and six arms. During the strip steel's operation, the rolled-up zinc slag adheres to the strip steel surface, causing zinc slag defects. At the same time, if the bottom slag accumulates severely, it will hinder the smooth progress of galvanizing. Therefore, in actual production, relevant measures need to be taken to mitigate zinc slag defects.

[0003] For surface slag, it can be removed manually or by robotic arms. However, bottom slag, due to its higher density, settles at the bottom of the zinc pot, and its long-term accumulation poses a significant risk to the production process. Currently, the effective method for removing bottom slag is to periodically stop the machine for slag removal, which undoubtedly affects production efficiency. Furthermore, due to the complexity of the zinc pot equipment, the operating space is very limited during bottom slag removal, resulting in low efficiency. To effectively remove bottom slag, Chinese patent CN203569170U discloses a placement-type zinc slag removal device. Its core invention is a simple zinc slag shovel structure design and fast slag removal speed. However, this patent requires slag removal along the bottom of the pot, making it unsuitable for continuous slag removal, and thus does not significantly improve production efficiency. Chinese patent CN111394673A discloses an electromagnetically driven device for removing bottom slag from the zinc pot. By placing two pairs of positive and negative electrodes in the bottom area of ​​the zinc pot, the combined interaction of current and magnetic field generates a directional electromagnetic driving force, forming a flow field area containing slag-laden zinc liquid, driving the zinc liquid at the bottom of the zinc pot and removing the bottom slag. The patented slag removal area is fixed, the operating current is difficult to control, and the slag removal efficiency is very limited. Therefore, how to efficiently remove bottom slag online without stopping the machine has always been a difficult problem in the hot-dip galvanizing process. Utility Model Content

[0004] The purpose of this invention is to overcome the defects of the prior art by providing a dynamic electromagnetic slag removal device for hot-dip galvanizing, which can effectively remove the slag accumulated during the hot-dip galvanizing process, thereby reducing the number of downtimes for slag removal and improving production efficiency.

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

[0006] This utility model provides a dynamic electromagnetic drive bottom slag device for hot-dip galvanizing process, including: magnetic field generator, heat insulation shell, connecting rod and external moving parts;

[0007] The magnetic field generator is placed inside the heat-insulating shell and is fixedly connected by a connecting rod. The top of the connecting rod is connected to an external moving part to adjust the position of the magnetic field generator in the molten metal pool.

[0008] The magnetic field generator includes a magnetic yoke and a coil. The magnetic yoke extends circumferentially and generates a rotating magnetic field by applying an alternating current to the coil, thereby driving the molten metal to move the bottom slag and thus removing the bottom slag from the hot-dip galvanizing process.

[0009] The connecting rod is equipped with an air inlet pipe, an air outlet pipe, and a wiring pipe for cooling and power supply.

[0010] Furthermore, the external moving part is a slide rail or a robotic arm.

[0011] Furthermore, the thickness of the heat insulation shell is 5mm to 50mm, and the material is stainless steel with WC-Co coating, SiC inorganic non-metallic material, or vacuum stainless steel alloy.

[0012] Furthermore, the connecting rod is made of stainless steel with a WC-Co coating, SiC inorganic non-metallic material, or vacuum stainless steel alloy.

[0013] Furthermore, the magnetic field generator has 1 to 3 pole pairs, is loaded with three-phase or two-phase AC power, has an excitation current of 0 to 2000A, and a frequency of 1 to 20Hz.

[0014] Furthermore, the frequency of the alternating current is 5 to 15 Hz.

[0015] Furthermore, the air inlet pipe and air outlet pipe are connected to an external fan.

[0016] Furthermore, the cable conduit is connected to an external power source.

[0017] Furthermore, the external moving parts are equipped with an automatic control unit that adjusts the position of the magnetic field generator in real time according to the distribution of slag at the bottom of the molten pool.

[0018] Furthermore, the depth at which the magnetic field generator is immersed in the molten metal pool can be adjusted within the range of 10% to 80% of the depth of the molten metal pool.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] (1) Dynamic slag removal without machine shutdown, improving work efficiency. A rotating magnetic field is generated by alternating current, which generates circumferential electromagnetic force in the molten metal pool, driving the flow of molten metal and moving the bottom slag, realizing real-time slag removal during the production process, and realizing slag removal during hot-dip galvanizing.

[0021] (2) Flexible control of slag removal area. This invention requires only one magnetic field generator, which can realize electromagnetic slag removal in different areas of the hot-dip galvanizing pool, greatly reducing operating space and energy consumption. The horizontal / vertical position of the magnetic field generator can be adjusted by slide rails or robotic arms to cover different areas of the molten pool.

[0022] (3) Compact structure and high temperature and corrosion resistance. The heat insulation shell and connecting rod are made of sprayed WC-Co stainless steel, SiC inorganic non-metallic material or vacuum stainless steel alloy, with a thickness of 5-50mm. It resists the high temperature of the molten pool and the corrosion of molten metal, and extends the service life of the device. Attached Figure Description

[0023] Figure 1 This is a sectional view of the dynamic electromagnetic drive bottom slag device in the hot-dip galvanizing process along the longitudinal section line.

[0024] Figure 2 A cross-sectional view of the dynamic electromagnetic drive bottom slag device in the hot-dip galvanizing process along the transverse section line.

[0025] Figure 3 This is a diagram showing the distribution of electromagnetic force under the action of a dynamic electromagnetic drive bottom slag device during the hot-dip galvanizing process.

[0026] Reference numerals: 1-Magnetic field generator, 2-Magnetic yoke, 3-Coil, 4-Insulated housing, 5-Connecting rod, 6-External moving parts, 7-Molten metal pool, 8-Air inlet pipe, 9-Air outlet pipe, 10-Cable conduit. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Component models, material names, connection structures, control methods, algorithms, and other features not explicitly described in this technical solution are considered common technical features disclosed in the prior art.

[0028] Example 1

[0029] This embodiment provides a dynamic electromagnetic drive bottom slag device for hot-dip plating process, such as... Figure 1-3 As shown, it includes: a magnetic field generator 1, a heat-insulating shell 4, a connecting rod 5, and an external moving part 6;

[0030] The magnetic field generator 1 is placed inside the heat-insulating shell 4 and is fixedly connected by a connecting rod 5. The top of the connecting rod 5 is connected to an external moving part 6, which is used to adjust the position of the magnetic field generator 1 in the molten metal pool 7. The position of the magnetic field generator 1 in the horizontal and vertical directions in the hot-dip galvanized metal pool 7 is changed by adjusting the external moving part 6.

[0031] The magnetic field generator 1 includes a magnetic yoke 2 and a coil 3. The magnetic yoke 2 is circumferentially extended and distributed. By applying an alternating current to the coil 3, a rotating magnetic field is generated, which drives the molten metal to move the bottom slag, so as to remove the bottom slag in the hot-dip galvanizing process.

[0032] The connecting rod 5 is equipped with an air inlet pipe 8, an air outlet pipe 9, and a wiring conduit 10 for cooling and power supply. The wiring conduit 10 is used for the wiring of the magnetic field generator 1 and for connecting to an external power source. The air inlet pipe 8 and the air outlet pipe 9 are connected to an external fan to enable air circulation and heat exchange between the magnetic field generator 1 and the outside environment. The heat dissipation intensity can be adjusted by controlling the airflow of the external fan.

[0033] In a specific implementation, the external moving part 6 is a robotic arm.

[0034] In a specific embodiment, the heat-insulating outer shell 4 has a thickness of 20mm and is made of stainless steel with a WC-Co coating. The connecting rod 5 is also made of stainless steel with a WC-Co coating.

[0035] In a specific embodiment, the magnetic field generator 1 has 1 to 3 pole pairs, each winding coil 3 is supplied with three-phase alternating current, the phase angle difference between the currents supplied to adjacent winding coils 3 is 120°, the excitation current is 1800A, and the frequency is 20Hz.

[0036] This embodiment has a simple structure, is easy to process, and is flexible in use and design. It generates a rotating magnetic field around the magnetic field generator 1 and generates a circumferential rotating electromagnetic force in the molten metal pool 7. With the cooperation of the external moving parts 6, the molten metal in the molten metal pool 7 moves and drives the bottom slag to move, so as to remove the bottom slag in the hot-dip galvanizing process.

[0037] Components not described in detail in this embodiment are all existing components that can be purchased through public channels.

[0038] The above description of the embodiments is provided to enable those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present utility model is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present utility model without departing from its scope should be within the protection scope of the present utility model.

Claims

1. A dynamic electromagnetic deslagging device for hot dip galvanizing processes, comprising: The magnetic field generator (1), the heat-insulating shell (4), the connecting rod (5), and the external moving parts (6) are characterized in that: The magnetic field generator (1) is placed inside the heat insulation shell (4) and fixedly connected by a connecting rod (5). The top of the connecting rod (5) is connected to an external moving part (6) to adjust the position of the magnetic field generator (1) in the molten metal pool (7). The magnetic field generator (1) includes a magnetic yoke (2) and a coil (3). The magnetic yoke (2) is circumferentially extended and distributed. By applying an alternating current to the coil (3), a rotating magnetic field is generated, which drives the molten metal to move the bottom slag. The connecting rod (5) is equipped with an air inlet pipe (8), an air outlet pipe (9), and a cable tray (10) for cooling and power supply.

2. A dynamic electromagnetic deslagging device for hot dip coating processes according to claim 1, characterized in that, The external moving part (6) is a slide rail or a robotic arm.

3. A dynamic electromagnetic deslagging device for hot dip coating processes according to claim 1, characterized in that, The heat insulation shell (4) has a thickness of 5mm to 50mm and is made of sprayed WC-Co coated stainless steel, SiC inorganic non-metallic material or vacuum stainless steel alloy.

4. A dynamic electromagnetic deslagging device for hot dip coating processes according to claim 1, characterized in that, The connecting rod (5) is made of stainless steel with WC-Co coating, SiC inorganic non-metallic material or vacuum stainless steel alloy.

5. A dynamic electromagnetic deslagging device for hot dip coating processes according to claim 1, characterized in that, The magnetic field generator (1) has 1 to 3 pole pairs, is loaded with three-phase or two-phase AC power, and has an excitation current of 0 to 2000A and a frequency of 1 to 20Hz.

6. A dynamic electromagnetic deslagging device for hot dip coating processes according to claim 1, characterized in that, The frequency of the alternating current is 5 to 15 Hz.

7. A dynamic electromagnetic deslagging device for hot dip coating processes according to claim 1, characterized in that, The air inlet pipe (8) and air outlet pipe (9) are connected to an external fan.

8. A dynamic electromagnetic drive dross device for hot dip coating processes according to claim 1, characterized in that, The cable conduit (10) is connected to an external power source.

9. A dynamic electromagnetic drive dross device for hot dip coating processes according to claim 1, characterized in that, The external moving part (6) is equipped with an automatic control unit, which adjusts the position of the magnetic field generator (1) in real time according to the distribution of the bottom slag of the molten pool.

10. A dynamic electromagnetic deslagging device for hot dip coating processes according to claim 1, characterized in that, The depth at which the magnetic field generator (1) is immersed in the molten metal pool (7) can be adjusted from 10% to 80% of the depth of the molten metal pool (7).

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