Scum removing device

Abstract

According to the dross removing device, a zinc liquid blowing pump set is arranged on one side of a furnace nose body and connected with the furnace nose body through a zinc liquid blowing pipe, and the outlet end of the zinc liquid blowing pipe is located at the zinc plating dross liquid level; and the other side of the furnace nose body is provided with a scum pumping pump set, and the scum pumping pump set is connected with the bottom of the furnace nose body through a zinc liquid scum pumping pipe. According to the scum removing device disclosed by the utility model, the scum is disturbed by blowing zinc liquid, and negative pressure suction is combined, so that efficient scum removal is realized. The device is reasonable in structure, high in automation degree and capable of remarkably reducing zinc liquid scum residues and improving the surface quality of a galvanized panel.

Description

Technical Field

[0001] This utility model relates to the field of hot-dip galvanizing process technology. Background Technology

[0002] In the zinc bath galvanizing process of high-end automotive panels, the control of surface dross on the zinc bath is crucial, directly affecting the uniformity of the coating, surface smoothness, and the corrosion resistance of the final product. Dross mainly consists of oxides, intermetallic compounds, and foreign impurities in the zinc bath. If not effectively removed, it can lead to defects such as particles, burrs, or incomplete plating on the coating surface, severely impacting the appearance quality and coating adhesion of the automotive panel. Furthermore, dross can embed itself within the coating, forming a potential source of corrosion, reducing the long-term protective capability of the zinc coating, and thus affecting the service life of the vehicle body.

[0003] In high-end automobile manufacturing, the surface quality requirements for galvanized panels are extremely stringent. Even the slightest defect can lead to failure in subsequent painting processes or affect the overall aesthetics of the vehicle. Therefore, during zinc plating, it is crucial to strictly control the dross on the surface of the molten zinc. Methods such as mechanical skimming, electromagnetic filtration, or the addition of alloying elements are commonly used to reduce dross formation, but these methods cannot completely and effectively eliminate dross from the zinc bath surface, thus affecting the quality of the galvanized layer. Simultaneously, stable zinc bath temperature, appropriate aluminum content, and good zinc bath management are also key factors in reducing dross. Only by ensuring the cleanliness of the zinc bath can galvanized panels meeting high-end automotive standards be produced, satisfying stringent requirements for corrosion resistance and surface quality. Utility Model Content

[0004] To address the problem of incomplete removal of scum from the surface of molten zinc, which affects the quality of zinc plating, this invention provides a scum removal device.

[0005] The technical solution adopted by this utility model to achieve the above-mentioned objective is as follows: a scum removal device, wherein a zinc blowing pump group 4 is provided on one side of the furnace nose body 1, the zinc blowing pump group 4 is connected to the furnace nose body 1 through a zinc blowing pipe 2, and the outlet end of the zinc blowing pipe 2 is located at the zinc scum liquid surface 5; a scum extraction pump group 8 is provided on the other side of the furnace nose body 1, the scum extraction pump group 8 is connected to the bottom of the furnace nose body 1 through a zinc scum extraction pipe 7.

[0006] The bottom of the furnace nose body 1 is equipped with a scum overflow plate 6 located on one side of the zinc liquid scum extraction pipe 7 port. The scum overflow plate 6 and the inner wall of the furnace nose body 1 form an overflow groove.

[0007] The bottom of the zinc blowing pump assembly 4 is equipped with a zinc liquid suction port 3.

[0008] The zinc blowing liquid pump group 4 and the slag removal pump group 8 are mounted on the furnace nose body 1 via the mounting plate 10.

[0009] The scum pump set 8 is connected to the scum discharge pipe 9.

[0010] This invention relates to a slag removal device that achieves efficient slag removal by agitating the slag with molten zinc and combining this with negative pressure suction. The device has a reasonable structure, a high degree of automation, and can significantly reduce slag residue in molten zinc, thereby improving the surface quality of galvanized panels. Attached Figure Description

[0011] Figure 1 This is the front view of the scum removal device of this utility model.

[0012] Figure 2 This is a left view of the scum removal device of this utility model.

[0013] Figure 3 This is a right view of the scum removal device of this utility model.

[0014] Figure 4 This is a perspective view of the scum removal device of this utility model.

[0015] In the diagram: 1. Furnace nose body, 2. Zinc liquid blowing pipe, 3. Zinc liquid suction port, 4. Zinc liquid blowing pump set, 5. Zinc slag surface, 6. Slag overflow plate, 7. Zinc liquid slag extraction pipe, 8. Slag extraction pump set, 9. Slag discharge pipe port, 10. Mounting plate. Detailed Implementation

[0016] The scum removal device of this utility model is as follows: Figure 1-4 As shown, the furnace nose body 1 includes a zinc liquid blowing pipe 2, a zinc liquid suction port 3, a zinc liquid blowing pump assembly 4, a scum overflow plate 6, a zinc liquid scum extraction pipe 7, a scum extraction pump assembly 8, and a scum discharge pipe 9. The zinc liquid blowing pump assembly 4 is installed on one side of the furnace nose body 1, connected to the furnace nose body 1 via the zinc liquid blowing pipe 2, with the outlet end of the zinc liquid blowing pipe 2 located at the zinc scum surface 5. The scum extraction pump assembly 8 is installed on the other side of the furnace nose body 1, connected to the bottom of the furnace nose body 1 via the zinc liquid scum extraction pipe 7. A scum overflow plate 6 is installed at the bottom of the furnace nose body 1, located on one side of the zinc liquid scum extraction pipe 7. The scum overflow plate 6 and the inner wall of the furnace nose body 1 form an overflow channel.

[0017] The furnace nose body 1, as a key component of the zinc pot, guides the strip steel into the molten zinc and controls the flow of the molten zinc. The molten zinc blowing pipe 2, installed on one side of the furnace nose, sprays molten zinc onto the surface of the molten zinc, loosening and re-aggregating the scum, guiding and controlling it into the scum overflow trough area. The molten zinc suction port 3 is located at the bottom of the zinc blowing pump unit, where clean molten zinc is concentrated, serving as the main medium for blowing in the molten zinc. The zinc blowing pump unit 4, composed of a motor-side zinc blowing pump, provides a high-pressure flow of molten zinc, enhancing the scum agitation effect. The galvanized scum surface 5 is the scum layer on the surface of the molten zinc; this invention primarily targets the removal of this layer. The scum overflow plate 6 guides the scum to gather in a specific area for subsequent suction. The molten zinc scum extraction pipe 7 connects to the molten zinc overflow suction port and transports the scum to the scum extraction pump unit. The scum extraction pump unit 8 provides negative pressure to extract the scum from the molten zinc overflow trough. The scum discharge pipe 9 discharges the collected scum from the system, achieving continuous scum removal.

[0018] Working principle

[0019] Slag blowing stage: The zinc liquid pump group 4 drives the zinc liquid to spray onto the zinc liquid surface through the zinc liquid blowing pipe 2, so that the slag is loosened and gathers near the slag overflow plate 6.

[0020] Slag removal stage: The slag removal pump group 8 is started, and the slag is sucked in through the zinc liquid overflow plate 6 and the zinc liquid slag extraction pipe 7, and finally discharged from the system through the slag discharge pipe 9.

[0021] Circulation control: By adjusting the flow rates of the zinc blowing liquid and the slag extraction, continuous removal of slag is achieved, ensuring a clean zinc liquid surface.

[0022] This invention employs a combined "blowing" and "extraction" method, significantly improving slag removal efficiency and reducing manual intervention. It enhances coating quality, reduces slag residue, and improves the surface smoothness and corrosion resistance of galvanized panels. Automated operation enables continuous slag discharge, reducing labor costs and increasing production efficiency. Its compact structure and high integration make it suitable for upgrading existing galvanizing production lines or configuring new ones. It can be applied to high-end automotive panel galvanizing production lines; in specific implementation, the layout of the blowpipes and suction inlets can be adjusted according to the zinc pot size to optimize slag removal.

[0023] This utility model has been described through embodiments. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, modifications can be made to these features and embodiments to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A scum removal device, characterized by: A zinc blowing pump group (4) is installed on one side of the furnace nose body (1). The zinc blowing pump group (4) is connected to the furnace nose body (1) through a zinc blowing pipe (2), and the outlet end of the zinc blowing pipe (2) is located at the zinc slag surface (5). A slag extraction pump group (8) is installed on the other side of the furnace nose body (1). The slag extraction pump group (8) is connected to the bottom of the furnace nose body (1) through a zinc slag extraction pipe (7).

2. A scum removal device according to claim 1, characterised in that: The bottom of the furnace nose body (1) is equipped with a scum overflow plate (6) on one side of the zinc liquid scum extraction pipe (7). The scum overflow plate (6) and the inner wall of the furnace nose body (1) form an overflow groove.

3. A scum removal device according to claim 1, characterised in that: The bottom of the zinc blowing pump assembly (4) is equipped with a zinc liquid suction port (3).

4. A scum removal device according to claim 1, characterised in that: The zinc blowing pump group (4) and the slag removal pump group (8) are mounted on the furnace nose body (1) via mounting plate (10).

5. A scum removal device according to claim 1, characterized in that: The scum pump set (8) is connected to the scum discharge pipe (9).

Images