CN117431485A - Hot galvanizing furnace nose assembly with multiple working modes and internal atmosphere control method thereof - Google Patents

Abstract

The invention discloses a multi-working mode hot-dip galvanizing furnace nose unit and its internal atmosphere control method, which includes: a baffle structure located between the upper end of the furnace nose and the hot tension roller chamber to prevent zinc dust from entering the Thermal roller chamber; the air inlet structure is located at the upper end of the furnace nose to introduce protective gas into the furnace nose body; the electric heating structure is located on the outer side of the furnace nose body to prevent the zinc ash from being deposited in the furnace nose body. The condensation agglomerates in the furnace nose body; the gas outlet structure is located at the lower end of the furnace nose to extract the zinc ash in the furnace nose body; the internal dew point control device of the furnace nose is located at the lower end of the furnace nose; The furnace nose internal monitoring device is used to monitor the particle size and flow rate of the zinc ash in the furnace nose body in real time. The present invention provides greater adaptability for the production of different products with different surface quality requirements in the same production line by using different management methods for the atmosphere inside the furnace nose.

Description

Multi-working mode hot-dip galvanizing furnace nose unit and its internal atmosphere control method

Technical field

The present invention relates to thin strip steel coating generation technology, and more specifically, to a multi-working mode hot-dip galvanizing unit furnace nose unit and its internal atmosphere control method.

Background technique

As shown in Figure 1 and Figure 2, during the continuous hot-plating process of strip steel, the strip 1 enters the hot tension roller chamber 2 from the annealing furnace, and then is diverted by the hot tension roller 3 and enters the furnace nose body. The furnace nose body includes the furnace nose upper end 4 and the furnace nose lower end 5. The strip steel 1 goes down through the furnace nose body and enters the zinc pot 6. The zinc pot 6 is an exclusive term widely recognized in the industry and refers to the "pot" containing liquid metal. "Shape" structure not only refers to liquid zinc, but also includes liquid zinc alloy, aluminum-iron alloy, zinc-aluminum-magnesium alloy, etc. There is liquid high-temperature metal liquid 7 in the zinc pot 6. The strip 1 goes down into the zinc pot 6 and is turned by the sinking roller 8 and then goes up, leaving the zinc pot area. In the actual continuous hot-dip galvanizing production line of strip steel, the furnace nose body is mostly of segmented design. The upper end of the furnace nose 4 and the lower end of the furnace nose 5 are connected by a flange 9. The upper end of the furnace nose 4 and the hot tension roller chamber 2 are connected. Connected through flange 10, the purpose of the above design is to facilitate maintenance. In addition, in order to prevent the strip 1 from being scratched due to excessive sag when running inside the furnace nose body, some furnace nose body designs include inner rollers 11.

The furnace nose body is a closed space, and the lower end 5 of the furnace nose is inserted into the metal liquid 7 by approximately 200 to 500 mm. Through this, the internal atmosphere of the furnace nose body and the external atmospheric environment are isolated. The internal gas and the gas in the hot tension roller chamber 2 are in communication with each other, and both are nitrogen and hydrogen protective gases. The metal liquid 7 underneath the furnace nose body will evaporate at high temperature to form metal vapor 13 since this area is in a nitrogen and hydrogen protective gas atmosphere. The metal vapor 13 is in a free state and diffuses inside the furnace nose body. The metal vapor 13 itself will condense to form micro-granular metal, which will also react with a small amount of oxygen components in the furnace nose body to generate corresponding metal oxide micro-particles. The above two are mixed together and are called furnace nose metal ash.

The metal ash produced by the evaporation of the metal liquid 7 diffuses inside the furnace nose body. When its content reaches a certain amount, it will be deposited on the inner wall of the furnace nose body. In addition, the protective atmosphere of the reflow will also bring the metal ash into the hot tension roller chamber 2 and even the furnace. area.

No matter the metal dust deposited on the inner wall of the furnace nose body or the metal dust entering the hot tension roller chamber 2 and the furnace area, it will have a negative impact on the hot galvanizing process of the strip 1 and the product quality. The analysis is as follows: the thickness of the metal dust adsorbed inside the furnace nose body is a continuous accumulation process. The metal dust is a loose structure. The metal dust on the inner wall of the body will fall off when it accumulates to a certain extent. The falling metal dust either falls directly on the strip steel, or falls on the metal liquid level at the bottom of the furnace nose. The metal dust in these two places is the cause of the common coating "exposed iron" and "metal gray" defects in this type of unit. source. In addition, the metal dust that flows back into the hot tension roller chamber and even the furnace with the protective gas will not directly affect the product quality, but a large amount of metal dust will be adsorbed on the roller surface in this area or on the surface of the heat exchanger, which will also cause production difficulties. , costs rise. The actual production line needs to be shut down regularly to clean the metal ash deposits in the hot tension roller chamber and annealing furnace, which is caused by this reason.

Judging from the development history of continuous hot-dip production lines, metal dust control was not taken seriously at the beginning. This was mainly because early users had low requirements for coating quality. If users of coated products have no objections, they will naturally not take it seriously. When the end-users of coating products have clear requirements for the quality defects of metal ash on the strip surface, the manufacturers of hot-dip steel strips have developed metal ash control technology and zinc ash "suppression" technology. A common practice at present is to increase the dew point of the protective gas inside the furnace nose, as shown in Figure 1. A high dew point nitrogen and hydrogen protective gas 9, that is, a humidified nitrogen and hydrogen protective gas, is introduced above the metal liquid level in the furnace nose. The difference between this part of the protective gas and the protective gas in the hot tension roller chamber 2 and the furnace nose body is that the water content in the protective gas is increased, while other components remain unchanged; the mechanism for increasing the water content in the protective atmosphere is, The water and the liquid metal on the metal surface react at high temperatures to form a metal oxide film. The existence of this film prevents the continued evaporation of the liquid metal, thereby achieving the purpose of controlling the amount of metal ash.

The above-mentioned measures have difficulties in actual production practice. The analysis is as follows: It is difficult to control "how much water" is passed into the furnace nose. Because the dew point is low, that is, there is less moisture, the effect of inhibiting metal evaporation is low. If the dew point is increased, that is, if there is too much moisture, the amount of metal oxides generated on the surface of the liquid metal will increase. If the protective gas contains excess water, the defect of "not plating" will occur. Based on the above analysis, the occurrence of metal dust inside the furnace nose and the resulting product defects are difficult problems in hot-dip production. Workers in the industry have also carried out targeted improvements to this problem.

There is also a technology in the industry that uses the furnace nose to extract and filter the zinc dust atmosphere, which is called the "filtration" mode. This technology also has disadvantages in practice. First of all, the existing "filtration" mode lacks monitoring of zinc ash. Zinc ash is prone to condensation and blockage, which requires shutdown processing. Especially for production lines where multiple products are produced on one unit, there are difficulties whether it is the "suppression" mode mentioned above or the "filtration" purification mode. The reason is that both "suppression" and "filtering" modes have their own applicable scenarios and are complementary methods.

Existing patent applications, such as US Patent No. 6315829B1, propose a method for extracorporeal circulation of furnace nose atmosphere, which involves arranging an independent furnace nose atmosphere extracorporeal circulation device to extract the internal atmosphere, filter it and then return it. This approach has certain rationality, but the method is single, and the air is easily blocked in practice by using the equipment described in this technology. For example, Chinese patent CN202380066U proposes a method of adding an additional nitrogen humidification system to improve the control ability of humidified gas. However, based on the previous analysis and description, this method will have a certain effect, but it cannot solve the negative impact of zinc ash on product quality. That is, increasing the water content in the protective gas will increase the occurrence of zinc oxide on the zinc liquid surface and "plating". "Not on" defect problem cannot be solved. For example, Chinese patent CN203270013U is similar to the US patent mentioned above, and proposes an independent zinc vapor circulation absorption device. Its main innovation point is to arrange a set of control devices to regulate the temperature and pressure of the atmosphere, but There are few reports on the application of this approach in actual production. The reason is that the protective atmosphere filter device is arranged independently, there is large heat loss, the temperature is difficult to maintain, zinc dust will accumulate in the pipeline, and no actual available production parameters are given. .

Contents of the invention

In view of the above-mentioned defects existing in the prior art, the purpose of the present invention is to provide a multi-working mode hot-dip galvanizing furnace nose unit and its internal atmosphere control method. By carrying out different management methods for the atmosphere inside the furnace nose, Producing different products with different surface quality requirements on the same production line provides greater adaptability.

In order to achieve the above objects, the present invention adopts the following technical solutions:

On the one hand, a multi-working mode hot-dip galvanizing furnace nose unit includes:

The baffle structure is located between the upper end of the furnace nose and the hot tension roller chamber to prevent zinc dust from entering the hot tension roller chamber;

The air inlet structure is located at the upper end of the furnace nose and introduces protective gas into the furnace nose body;

An electric heating structure is provided on the outer side of the furnace nose body to prevent the zinc ash from condensing and agglomerating in the furnace nose body;

The gas outlet structure is located at the lower end of the furnace nose and is used to extract the zinc ash from the furnace nose body;

A dew point control device inside the furnace nose is located at the lower end of the furnace nose to humidify the protective gas in the furnace nose body;

An internal monitoring device in the furnace nose is used to monitor the particle size and flow rate of the zinc ash in the furnace nose body in real time;

An internal metal liquid level pump forced circulation circuit device is installed in the furnace nose body to circulate the metal liquid;

An inner zinc liquid level protection gas purging device is provided in the furnace nose body to purge the liquid level of the metal liquid.

Preferably, the baffle structure includes a first baffle located above the strip and a second baffle located below the hot tension roller;

The first baffle is configured as an adjustable opening structure, and the second baffle is configured as a fixed structure.

Preferably, the air inlet structure includes an air inlet pipe connected to the upper end of the furnace nose;

The air inlet pipe is equipped with an electric pipe heater.

Preferably, the gas outlet structure includes a gas outlet pipe connected to the lower end of the furnace nose;

The gas outlet pipe is also equipped with an electric heater, a sedimentation device, and a filter in sequence.

Preferably, the electric heating structure is a thermal resistance wire provided on the outer surface of the furnace nose body.

On the other hand, an internal atmosphere control method for the furnace nose unit of a hot-dip galvanizing unit based on the multi-working mode includes:

Inhibition mode eliminates or reduces the occurrence of metal dust by inhibiting the evaporation of metal liquid to achieve controlled surface quality of the product;

In the purification mode, the metal ash produced by the evaporation of the metal liquid is extracted to the outside of the furnace nose body for purification, so as to control the surface quality of the product;

The transition mode is the transition from the suppression mode to the purification mode to control the surface quality of the product.

Preferably, the suppression mode includes the hot-dip galvanizing group furnace nose opening, the furnace nose body, the internal metal liquid level pump forced circulation circuit device, the furnace nose internal dew point control device, and the electric heating structure and the furnace nose internal monitoring device;

Close the opening-adjustable structure, the air inlet structure and the air outlet structure.

Preferably, the purification mode includes the hot-dip galvanizing group furnace nose opening the furnace nose body, the internal metal liquid level pump forced circulation circuit device, the opening adjustable structure, the air inlet structure, The gas outlet structure, the electric heating structure and the furnace nose internal monitoring device;

Close the dew point control device inside the furnace nose and the protective gas purge device for the inner zinc liquid level.

Preferably, the transition mode includes the hot-dip galvanizing group furnace nose opening the furnace nose body, the internal metal liquid level pump forced circulation circuit device, the furnace nose internal dew point control device, the opening degree can Adjustment structure, the air inlet structure, the electric heating structure and the internal monitoring device of the furnace nose;

Close the air outlet structure.

Preferably, the products include hot-dip pure zinc products, hot-dip galvanized iron alloy products, hot-dip aluminum-zinc alloy products and hot-dip aluminum-zinc-magnesium alloy products;

The metal liquid used in the hot-dip pure zinc product includes the following components in terms of mass percentage: Al: 0.14~0.30%, the balance is Zn, and the temperature range is 450~470°C;

The metal liquid used in the hot-dip galvanized iron alloy product includes the following components in terms of mass percentage: Al: 0.10~0.14%, the balance is Zn, and the temperature range is 450~470°C;

The metal liquid used in the hot-dip aluminum-zinc alloy product includes the following components in terms of mass percentage: Al: 50-55%, Si: 1.0-1.5%, the balance is Zn, and the temperature range is 590-600°C;

The metal liquid used in the hot-dip aluminum-zinc-magnesium alloy product includes the following components in terms of mass percentage: Al: 50 to 55%, Si: 1.0 to 1.5%, Mg: 1.0 to 2.0%, and the balance is Zn. The temperature range It is 590~600℃.

The invention provides a multi-working mode hot-dip galvanizing furnace nose unit and its internal atmosphere control method, which eliminates the impact on the surface quality of hot-dip galvanizing products and the normal operation of the production line caused by the presence of metal ash inside the furnace nose of the hot-dip galvanizing unit. The negative impact is beneficial to the improvement of hot-dip product quality and the stable operation of hot-dip units, especially for multi-product units. Different working modes are used to control zinc dust in the furnace nose.

Description of the drawings

Figure 1 is a schematic structural diagram of the existing furnace nose body assembly;

Figure 2 is a schematic view of direction A in Figure 1;

Figure 3 is a schematic structural diagram of the furnace nose of the hot-dip galvanizing group according to the present invention;

Figure 4 is a schematic view of direction B in Figure 3;

Figure 5 is a schematic diagram of the air intake structure in Figure 3;

Figure 6 is a schematic diagram of the air outlet structure in Figure 3.

Detailed ways

In order to better understand the above technical solutions of the present invention, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and examples.

As shown in Figures 3 to 6, the present invention provides a multi-working mode hot dip galvanizing furnace nose unit, including:

The baffle structure is located between the upper end 21 of the furnace nose and the hot tension roller chamber 22 to prevent zinc ash from entering the hot tension roller chamber 22. It includes the first baffle 20 located above the strip 100 and the hot tension roller 36. The second baffle 37 below. Among them, the first baffle 20 is set as an adjustable opening structure, and its opening Δ2 can be adjusted for strip steel with different thicknesses. The second baffle 37 is set as a fixed structure, and its opening Δ1 is enough for the operation of the hot tension roller 36. Can.

The air inlet structure 23 is located at the upper end 21 of the furnace nose. Protective gas, such as nitrogen, is introduced into the furnace nose body. As shown in Figure 5, the air inlet structure 23 includes an air inlet pipe 29 connected to the upper end 21 of the furnace nose. The gas pipeline 29 is provided with a pipeline electric heater 30 (heating temperature is greater than 420°C). The air inlet pipe 29 is also provided with a pressure detection instrument, which realizes pressure regulation through a pressure reducing valve, and a temperature detection instrument, which realizes temperature adjustment through an electric heater 30 . The air inlet pipe 29 realizes the balance of pressure (micro-positive pressure) and energy inside the furnace nose body (to prevent the temperature of the inner wall of the furnace from falling) by adjusting the pressure and temperature. At the same time, the air inlet structure 23 also has the supplementary function of purging the zinc dust on the inner wall of the furnace nose body.

The electric heating structure 24 is located on the outer side of the furnace nose body to prevent zinc ash from condensing and agglomerating in the furnace nose body; the electric heating structure 24 uses thermal resistance wires to maintain a higher temperature of the furnace nose body.

The gas outlet structure 25 is located at the lower end 26 of the furnace nose to extract the atmospheric zinc ash generated by the metal vapor 27 in the furnace nose body. As shown in Figure 6, the gas outlet structure 25 includes an air outlet pipe 31 connected to the lower end 26 of the furnace nose. The gas outlet pipe 31 is also provided with an electric heater, a sedimentation device 32, and a filter 33 in sequence; the sedimentation device 32 is used to deposit large particles of zinc ash (coarse filtration), and the filter 33 is used to filter small particles of zinc ash (fine filtration). ).

The dew point control device 28 inside the furnace nose is located at the lower end 26 of the furnace nose and is used to humidify the protective gas in the furnace nose body, thereby reducing zinc dust through surface oxidation.

The furnace nose internal monitoring device is used to monitor the zinc ash particle size and flow rate in the furnace nose body in real time, and maintain the zinc ash concentration within a stable range.

The internal metal liquid level pump forced circulation circuit device is located in the furnace nose body and is used to circulate the metal liquid 35.

The internal zinc liquid level protection gas purging device is located in the furnace nose body and is used to purge the liquid level of the metal liquid 35 .

The invention also provides an internal atmosphere control method of the hot-dip galvanizing group furnace nose unit based on the multi-working mode of the present invention. The hot-dip galvanizing group furnace nose needs to be able to meet the production requirements of a variety of products with different process windows and characteristics. Since zinc The characteristics of the metal liquid 35 in the pot 34 are also different. Generally speaking, there are two main types. One is called the 460+ zinc pot, which includes pure zinc, zinc-iron alloy, low aluminum zinc, aluminum magnesium, etc., and its typical temperature is 460± 10℃. The second one is called 600+ zinc pot, which includes aluminum-zinc alloy, high-aluminum-zinc-aluminum-magnesium, etc. Its typical temperature is 595±5℃. The zinc pots with the above two temperatures require different zinc ash control modes in actual production. The modes mainly include:

Inhibition mode eliminates or reduces the occurrence of metal dust by inhibiting the evaporation of the metal liquid 35 to achieve controlled surface quality of the product;

In the purification mode, the metal ash produced by the evaporation of the metal liquid 35 is extracted to the outside of the furnace nose body for purification, so as to control the surface quality of the product;

The transition mode is the transition from inhibition mode to purification mode to achieve stability and integrity of the generation process and control of the surface quality of the product.

In the three working modes, the opening/closing conditions of each component of the hot-dip galvanizing furnace nose are as follows:

The suppression mode includes the opening of the furnace nose of the hot-dip galvanizing group, the furnace nose body, the internal metal liquid level pump forced circulation circuit device, the internal zinc liquid level protective gas purge device, the furnace nose internal dew point control device 28, the electric heating structure 24 and the interior of the furnace nose. monitoring device;

Close the opening-adjustable structure 20, the air inlet structure 23, and the air outlet structure 25.

The purification mode includes the hot-dip galvanizing group furnace nose opening furnace nose body, the internal metal liquid level pump forced circulation circuit device, the opening adjustable structure 20, the air inlet structure 23, the air outlet structure 25, the electric heating structure 24 and the furnace nose internal monitoring device ;

Close the dew point control device 28 inside the furnace nose and the zinc liquid level protective gas purge device inside the furnace nose body.

The transition mode includes the opening of the furnace nose of the hot-dip galvanizing group, the furnace nose body, the internal metal liquid level pump forced circulation circuit device, the internal zinc liquid level protective gas purge device, the furnace nose internal dew point control device 28, the opening adjustable structure 20, and Gas structure 23, internal gas purging device of the furnace nose body, electric heating structure 24 and furnace nose internal monitoring device;

Close the air outlet structure 25.

Products include hot-dip pure zinc products, hot-dip galvanized iron alloy products, hot-dip aluminum-zinc alloy products and hot-dip aluminum-zinc-magnesium alloy products;

The metal liquid used in hot-dip pure zinc products includes the following components in terms of mass percentage: Al: 0.14~0.30%, the balance is Zn, and the temperature range is 450~470°C;

The metal liquid used in hot-dip galvanized iron alloy products includes the following components in terms of mass percentage: Al: 0.10~0.14%, the balance is Zn, and the temperature range is 450~470°C;

The metal liquid used in hot-dip aluminum-zinc alloy products includes the following components in terms of mass percentage: Al: 50~55%, Si: 1.0~1.5%, the balance is Zn, and the temperature range is 590~600°C;

The metal liquid used in hot-dip aluminum-zinc-magnesium alloy products includes the following components in terms of mass percentage: Al: 50~55%, Si: 1.0~1.5%, Mg: 1.0~2.0%, the balance is Zn, and the temperature range is 590 ~600℃.

During the production of the above four products, the metal dust generated can be effectively controlled; according to the different needs of product quality, the interactive switching of two working modes of metal dust suppression evaporation and external filtration is selected to provide flexibility in furnace nose atmosphere control.

To sum up, the multi-working mode hot-dip galvanizing furnace nose unit and its internal atmosphere control method of the present invention are improved and improved on the basis of existing patents. It has many functions and many optional modes, and can meet the needs of different products. The demand for collinear production can effectively eliminate the negative impact of metal dust on product quality.

Those of ordinary skill in the art should realize that the above embodiments are only used to illustrate the present invention and are not used to limit the present invention. As long as they are within the scope of the essential spirit of the present invention, the above embodiments can be Changes and modifications will fall within the scope of the claims of the present invention.

Claims (10)

1. A multi-working mode hot-dip galvanizing furnace nose unit, which is characterized by including: The baffle structure is located between the upper end of the furnace nose and the hot tension roller chamber to prevent zinc dust from entering the hot tension roller chamber; The air inlet structure is located at the upper end of the furnace nose and introduces protective gas into the furnace nose body; An electric heating structure is provided on the outer side of the furnace nose body to prevent the zinc ash from condensing and agglomerating in the furnace nose body; The gas outlet structure is located at the lower end of the furnace nose and is used to extract the zinc ash from the furnace nose body; A dew point control device inside the furnace nose is located at the lower end of the furnace nose to humidify the protective gas in the furnace nose body; An internal monitoring device in the furnace nose is used to monitor the particle size and flow rate of the zinc ash in the furnace nose body in real time; An internal metal liquid level pump forced circulation circuit device is installed in the furnace nose body to circulate the metal liquid; An inner zinc liquid level protection gas purging device is provided in the furnace nose body to purge the liquid level of the metal liquid. 2. The multi-working mode hot-dip galvanizing furnace nose unit according to claim 1, wherein the baffle structure includes a first baffle located above the strip and a third baffle located below the hot tension roller. Second baffle, The first baffle is configured as an adjustable opening structure, and the second baffle is configured as a fixed structure. 3. The multi-working mode hot-dip galvanizing furnace nose unit according to claim 1, characterized in that: the air inlet structure includes an air inlet pipe connected to the upper end of the furnace nose; The air inlet pipe is provided with a pipe electric heater. 4. The multi-working mode hot-dip galvanizing furnace nose unit according to claim 1, characterized in that: the gas outlet structure includes a gas outlet pipe connected to the lower end of the furnace nose; The gas outlet pipe is also equipped with an electric heater, a sedimentation device, and a filter in sequence. 5. The multi-working mode hot-dip galvanizing furnace nose unit according to claim 1, characterized in that the electric heating structure is a thermal resistance wire provided on the outer surface of the furnace nose body. 6. An internal atmosphere control method for the furnace nose unit of a hot-dip galvanizing unit based on the multi-working mode described in one of claims 1 to 5, characterized in that it includes: Inhibition mode eliminates or reduces the occurrence of metal dust by inhibiting the evaporation of metal liquid to achieve controlled surface quality of the product; In the purification mode, the metal ash produced by the evaporation of the metal liquid is extracted to the outside of the furnace nose body for purification, so as to control the surface quality of the product; The transition mode is the transition from the suppression mode to the purification mode to control the surface quality of the product. 7. The internal atmosphere control method according to claim 6, characterized in that: the suppression mode includes the hot-dip galvanizing group furnace nose opening the furnace nose body, the internal metal liquid level pump forced circulation circuit device, The furnace nose internal dew point control device, the electric heating structure and the furnace nose internal monitoring device; Close the opening-adjustable structure, the air inlet structure and the air outlet structure. 8. The internal atmosphere control method according to claim 6, characterized in that: the purification mode includes the hot-dip galvanizing group furnace nose opening the furnace nose body, the internal metal liquid level pump forced circulation circuit device, The opening adjustable structure, the air inlet structure, the air outlet structure, the electric heating structure and the furnace nose internal monitoring device; Close the dew point control device inside the furnace nose and the protective gas purge device for the inner zinc liquid level. 9. The internal atmosphere control method according to claim 6, characterized in that: the transition mode includes the hot-dip galvanizing group furnace nose opening the furnace nose body, the internal metal liquid level pump forced circulation circuit device, The furnace nose internal dew point control device, the opening adjustable structure, the air inlet structure, the electric heating structure and the furnace nose internal monitoring device; Close the air outlet structure. 10. The internal atmosphere control method according to claim 6, characterized in that: the products include hot-dip pure zinc products, hot-dip galvanized iron alloy products, hot-dip aluminum-zinc alloy products and hot-dip aluminum-zinc-magnesium alloy products; The metal liquid used in the hot-dip pure zinc product includes the following components in terms of mass percentage: Al: 0.14~0.30%, the balance is Zn, and the temperature range is 450~470°C; The metal liquid used in the hot-dip galvanized iron alloy product includes the following components in terms of mass percentage: Al: 0.10~0.14%, the balance is Zn, and the temperature range is 450~470°C; The metal liquid used in the hot-dip aluminum-zinc alloy product includes the following components in terms of mass percentage: Al: 50-55%, Si: 1.0-1.5%, the balance is Zn, and the temperature range is 590-600°C; The metal liquid used in the hot-dip aluminum-zinc-magnesium alloy product includes the following components in terms of mass percentage: Al: 50 to 55%, Si: 1.0 to 1.5%, Mg: 1.0 to 2.0%, and the balance is Zn. The temperature range It is 590~600℃.