A special slagging agent for high-aluminum zinc alloy production and a preparation and use method thereof

Abstract

The application discloses a special slagging agent for high-aluminum zinc alloy production and a preparation and use method thereof, and belongs to the technical field of metal smelting. The special slagging agent is based on a CaO-AlCl3-SiO2 ternary basic slag system, and the components include calcium oxide, aluminum chloride, sodium carbonate, a small amount of Na3AlF6 as a fluxing agent, and a biomass temperature raising agent. The fluorine content is controlled to be below 1.5%. The special slagging agent has the characteristics of low melting point, low viscosity and high specific surface area, can efficiently absorb and remove non-metallic inclusions such as Al2O3 and ZnO in a high-aluminum zinc alloy melt, the deslagging efficiency is greater than or equal to 98%, the direct metal recovery rate is greater than or equal to 97%, the environmental protection performance is excellent, the dust content in flue gas is reduced by more than 80% compared with traditional ammonium chloride, and the special slagging agent is suitable for large-scale clean production of high-purity high-aluminum zinc alloy.

Description

Technical Field

[0001] This invention belongs to the field of metal smelting technology, specifically relating to a slag-forming agent for the production of high-alumina zinc alloys and its preparation and application methods. Background Technology

[0002] High-alumina zinc alloys (Al content 25-55%) are widely used in high-end fields such as automotive steel sheets, aerospace, and electronic components. They are key functional anti-corrosion coating materials, and hot-dip galvanizing companies have extremely strict requirements regarding the content of non-metallic inclusions in high-alumina zinc alloys. The production process of high-alumina zinc alloys mainly includes melting, composition adjustment, slag removal and refining, modification treatment, solution strengthening, and casting. Due to natural oxide inclusions on the metal surface and high-temperature oxidation during the melting process, a large amount of slag floats on the surface of the molten zinc alloy. This slag has characteristics such as a high melting point, high viscosity, and high dispersion in the alloy liquid. If the slag removal effect is poor, it can easily be carried into the product during casting, forming non-metallic inclusions, resulting in a high remelting slag rate in the high-alumina zinc alloy, affecting the uniformity and anti-corrosion performance of the high-alumina zinc alloy coating.

[0003] Traditional slagging agents used in the zinc smelting and casting industry, such as ammonium chloride, are commonly used as fluxing agents or atmosphere conditioners. They lack inclusion adsorption capacity, have poor slagging properties, and produce viscous slag, leading to incomplete slagging of high-alumina zinc alloys. This results in increased non-metallic impurities in the high-alumina zinc alloys, affecting alloy properties. Furthermore, ammonium chloride slagging generates a large amount of dust and emits irritating gases such as ammonia; the dust content in the flue gas can reach 500-700 mg / m³. 3 The environment is severely polluted.

[0004] Currently, research on aluminum alloy slag-forming agents abroad is based on slag-forming systems containing large amounts of chlorides and fluorides. These systems significantly increase the fluorine and chloride content in the slag phase, leading to difficulties in the later-stage disposal of the slag material and easily causing environmental pollution from chlorides and fluorides. The slag-forming temperature in this system reaches 850-950℃, close to the boiling point of zinc (907℃), causing significant zinc metal oxidation and loss, making it unsuitable for the production of zinc-containing aluminum alloys. Although low-fluoride improved versions have been developed in recent years, such as the CaO-Al2O3-MgO slag-forming agent developed by JFE Steel in Japan, which reduces the fluorine content to 3%, the slag-forming time is long, the slag layer viscosity is high, and metal entrainment during slag removal easily causes metal loss. In China, Shanghai Zhengli Ferroalloy uses a lime-fluorite (7:3) alkaline slag system, which has a good slag-forming effect, but the large amount of fluorite used leads to serious fluorine pollution, and the removal rate of fine inclusions is less than 60%.

[0005] Therefore, developing a special slag-forming agent that combines high-efficiency slag removal, low fluorine and environmental friendliness, and suitability for the production of high-purity aluminum alloys has significant industrial value. Summary of the Invention

[0006] In order to overcome the problems existing in the background technology, the present invention provides a special slag-forming agent for the production of high-aluminum zinc alloys and its preparation and use method, so as to solve the problems of incomplete slag removal, serious fluorine pollution, and difficulty in separating molten slag from aluminum liquid by existing slag-forming agents.

[0007] To achieve the above objectives, this application provides a special slagging agent for the production of high-alumina zinc alloys, and its preparation and application method, as detailed below: In one aspect, this application provides a slagging agent specifically for the production of high-alumina zinc alloys, wherein the high-alumina zinc alloy contains 25-65 wt% aluminum, 1-2 wt% silicon, 0.05-0.1 wt% rare earth elements, and zinc is supplemented to 100 wt%. The slagging agent for high-aluminum zinc alloy production, by weight percentage, consists of the following components: Calcium oxide (CaO) 30%-60%; Aluminum chloride (AlCl3) 15%-30%; Sodium carbonate (Na2CO) 3， 10%-30%; 5%-10% silicon dioxide (SiO2); Flux 0.5-2%; The flux includes calcium fluoride (CaF2) and / or cryolite powder (Na3AlF6).

[0008] More preferably, the mass ratio of calcium oxide (CaO) to aluminum chloride (AlCl3) is 2:1.

[0009] More preferably, the flux is at least one of calcium fluoride (CaF2) or cryolite powder (Na3AlF6).

[0010] Further preferred, the slag-forming agent for high-aluminum zinc alloy production has a particle size of 150-500 μm and a moisture content of ≤0.2%.

[0011] Further preferably, the slag-forming temperature of the slag-forming agent is 650-700℃.

[0012] Secondly, this application provides a method for preparing a special slagging agent for the production of high-alumina zinc alloys, comprising the following steps: (1) Weigh the following components according to the weight ratio: 30%-60% calcium oxide, 15%-30% aluminum chloride, 10%-30% sodium carbonate, 5%-10% silicon dioxide, and 0.5%-2% calcium fluoride and / or cryolite powder; (2) Stir at 80-120℃ for 30-45 min to prepare a dry mixture; (3) Continue stirring until it cools naturally to obtain the special slagging agent for the production of high aluminum zinc alloy.

[0013] Thirdly, this application provides a method for using a special slagging agent in the production of high-aluminum zinc alloys, comprising the following steps: (1) Alloy smelting: Weigh aluminum ingots, zinc ingots, industrial silicon and rare earth raw materials according to the proportion of high aluminum zinc alloy, add them to a 10 t coreless induction furnace, heat the furnace until the metal is completely melted, and add borax (Na2B4O7·10H2O) during the melting process. (2) Slag-forming reaction: The slag-forming agent for the production of high-aluminum zinc alloy is sprinkled onto the surface of the completely molten alloy liquid. The amount of slag-forming agent added is 0.3%-0.5% of the mass of the alloy liquid. Stir to make the slag-forming agent fully contact the alloy liquid, and keep it at 650-700℃ for 15-20 min to make the slag formed by the slag-forming reaction float to the surface. (3) Heating and separation: The biomass heating agent is evenly sprinkled onto the surface of the molten slag and stirred to rapidly raise the temperature of the molten slag to 850-900℃, generating loose slag; (4) Slag removal: The loose slag is removed to achieve slag-liquid separation.

[0014] Further preferred, in step (1), the amount of borax added is 0.4%-0.8% of the total mass of the high-aluminum zinc alloy.

[0015] Further preferred, in step (3), the biomass heating agent is at least one of high-gluten flour or wheat bran.

[0016] Further preferred, in step (2), the amount of slag-forming agent added is 3-5 kg ​​for every 1 t of high-aluminum zinc alloy smelted.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application.

[0018] The beneficial effects of this invention are: 1. This application utilizes a slag-forming agent formulated in a specific ratio, which not only improves slag removal efficiency (≥98%) but also increases direct recovery rate (≥97%) during the preparation of high-aluminum zinc alloys, significantly enhancing the purity of the high-aluminum zinc alloys. This is because the high-aluminum zinc alloy slag-forming agent developed in this study achieves efficient impurity removal through a three-step process: adsorption-flotation-heating slag formation. (1) Adsorption stage: The CaO-AlCl3-SiO2 basic slag system forms a low viscosity slag at 850℃, which can quickly adsorb Al2O3 inclusions in the melt, and the adsorption rate is higher than that of the traditional slag system. (2) Floating stage: The flux CaF2 and Na3AlF6 reduced the interfacial tension between the slag and the melt, and increased the floating speed of the slag. It can float to the surface completely within 15 minutes. (3) Heating and slag formation stage: Biomass heating agent can rapidly increase the surface slag temperature to 800-850℃, melt the slag into fluffy slag, greatly reduce the viscosity of the slag, which is beneficial for separating the alloy liquid from the slag and improving the direct metal recovery rate.

[0019] 2. The slag-forming agent for high-alumina zinc alloy production provided in this application maintains the alloy liquid temperature at 650-750℃ throughout the slag-forming process. It relies on a biomass heating agent to rapidly raise the slag temperature to 850-900℃, while the alloy liquid temperature does not need to be raised. This can match the casting temperature of high-alumina zinc alloy, reduce product energy consumption, and reduce high-temperature oxidation of metal.

[0020] 3. The slag-forming agent provided in this application uses CaO, AlCl3, and Na2CO3 as effective slag-forming components to ensure complete separation of slag and liquid during the slag-forming reaction. It also uses CaF2 and Na3AlF6 as fluxing agents and utilizes biomass heating agents to provide the interface temperature of the CaO-Al2O3-SiO2 basic slag system, thereby improving the separation effect of slag and alloy liquid. The slag-forming agent and slag-forming products do not contain toxic and heavily polluting gases such as NH3, Cl2, CCl4, and C6Cl6, and do not produce a large amount of white smoke generated by the decomposition of NHCl, thus taking into account both green environmental protection and product economy.

[0021] 4. The raw materials for the slag-forming agent provided in this application are readily available, and the preparation process is simple, making it suitable for industrial production. Attached Figure Description

[0022] Figure 1 This is a process flow diagram of the slag-forming agent usage method in this application; Figure 2 This is a process diagram of the preparation of the high-aluminum zinc alloy of this application; Figure 3 These are actual images of the preparation of high-aluminum zinc alloys with different treatments according to this application. Detailed Implementation

[0023] To make the objectives, technical solutions, and beneficial effects of the present invention clearer, the preferred embodiments of the present invention will be described in detail below to facilitate understanding by those skilled in the art.

[0024] This invention provides a special slag-forming agent for the production of high-aluminum zinc alloys, and its preparation and application method. It can significantly improve slag removal efficiency, enhance the purity of high-aluminum zinc alloys, and has low fluorine content, making it environmentally friendly. The preparation process is simple and suitable for industrial production.

[0025] Unless otherwise specified, all reagents and materials used in the following examples were purchased from the market.

[0026] Example 1: In this embodiment, industrial pure aluminum ingots (Al99.85, GB / T 1196-2023), zinc ingots (Zn99.995, GB / T 470-2008), industrial silicon (Si3303, GB / T 2881-2023), rare earth (LaCe-65CeA, GB / T40854-2021) are used as raw materials for high-aluminum zinc alloy, along with borax.

[0027] The main raw materials for the slag-forming agent are calcium oxide (CaO≥92%), aluminum chloride (AlCl3≥98%), and sodium carbonate (Na2CO3≥99%), all of which are industrial grade; the fluxing agent is calcium fluoride (CaF2≥95%) and cryolite powder (Na3AlF6≥98%); the biomass heating agent is high-gluten flour or wheat bran.

[0028] The specific method for preparing high-aluminum zinc alloy includes the following steps: (1) Preparation of slag-forming agent: Take the following components by weight percentage: CaO 50%, AlCl3 25%, Na2CO3 19%, SiO2 5%, CaF2 1%, stir at 120℃ for 30 min to make a dry mixture, and then stir continuously until naturally cooled to obtain 5 kg of dry mixture, which is the special slag-forming agent for the production of high aluminum zinc alloy. The particle size of the slag-forming agent is 350 μm and the moisture content is 0.18%; (2) Preparation of high aluminum zinc alloy: Take the following raw materials with the following weight percentages: 57% aluminum ingot, 41.53% zinc ingot, 1.4% silicon, and 0.07% rare earth, with a total weight of 1 t, and add them to a 10 t coreless induction furnace. Heat the furnace until the metal is completely melted. During the melting process, add 5 kg of borax (Na2B4O7·10H2O) to reduce oxidation during the metal melting process. (3) Slag formation: The slag-forming agent is sprinkled onto the surface of the completely molten zinc alloy liquid. The amount of slag-forming agent added is 0.5% of the mass of the molten high-aluminum zinc alloy liquid. Stir continuously to ensure that the slag-forming agent is fully in contact with the high-aluminum zinc alloy liquid and to carry out the slag-forming reaction. The molten zinc alloy liquid is kept at 700℃ for 15 minutes, and the slag formed by the slag-forming reaction continuously floats to the surface. (4) Heating: Sprinkle high-gluten flour evenly on the surface of the molten slag and stir continuously to rapidly raise the surface molten slag temperature to the interface temperature of the CaO-AlCl3-SiO2 basic slag system of 900℃. The surface of the alloy liquid will eventually generate fluffy slag, which is convenient for slag removal until the slag and liquid are completely separated. Use a blower to extract the small amount of smoke generated by the slag-making reaction. (5) Slag removal: Remove the loose slag from the surface of the zinc alloy liquid.

[0029] Based on process calculations and product testing, this embodiment achieved a final slag removal efficiency of 98.52%, a direct recovery rate of 97.68%, an alloy melt temperature of 698℃, a slag temperature of 905℃, a high-alumina zinc alloy casting qualification rate of 100%, a slag ratio of 2.3% after high-alumina zinc alloy remelting, and a flue gas dust content of 80 mg / m³. 3 .

[0030] Example 2: (1) Preparation of slag-forming agent: Take the following components by weight percentage: CaO 45%, AlCl3 22.5%, Na2CO3 25%, SiO2 6.5%, CaF2 1%, stir at 100℃ for 37.5 min to make a dry mixture, and then stir continuously until naturally cooled to obtain 5 kg of dry mixture, which is the special slag-forming agent for the production of high aluminum zinc alloy. The particle size of the slag-forming agent is 200 μm and the moisture content is 0.16%; (2) Preparation of high aluminum zinc alloy: Take the following raw materials with the following weight percentages: 55% aluminum ingot, 43.325% zinc ingot, 1.6% silicon, and 0.075% rare earth, with a total weight of 1 t, and add them to a 10 t coreless induction furnace. Heat the furnace until the metal is completely melted. During the melting process, add 5 kg of borax (Na2B4O7·10H2O) to reduce oxidation during the metal melting process. (3) Slag formation: The slag-forming agent is sprinkled onto the surface of the completely molten zinc alloy liquid. The amount of slag-forming agent added is 0.4% of the mass of the molten zinc alloy liquid. Stir continuously to ensure that the slag-forming agent is fully in contact with the zinc alloy liquid and to carry out the slag-forming reaction. The molten zinc alloy liquid is kept at 650℃ for 20 minutes. The slag formed by the slag-forming reaction continuously floats to the surface. (4) Heating: Spread wheat bran evenly on the surface of the molten slag and stir continuously to rapidly raise the surface slag temperature to the interface temperature of the CaO-AlCl3-SiO2 basic slag system of 875℃. The surface of the alloy liquid will eventually generate fluffy slag, which is convenient for slag removal until the slag and liquid are completely separated. Use a blower to extract the small amount of smoke generated by the slag-making reaction. (5) Slag removal: Remove the loose slag from the surface of the zinc alloy liquid.

[0031] Based on process calculations and product testing, this embodiment achieved a final slag removal efficiency of 92.09%, a direct recovery rate of 95.34%, an alloy melt temperature of 730℃, a slag temperature of 886℃, a high-alumina zinc alloy casting qualification rate of 98%, a slag ratio after high-alumina zinc alloy remelting of 3.6%, and a flue gas dust content of 70 mg / m³. 3 .

[0032] Example 3: (1) Preparation of slag-forming agent: Take the following components by weight percentage: CaO 40%, AlCl3 20%, Na2CO3 29%, SiO2 10%, CaF2 and Na3AlF6 0.5% each, stir at 80℃ for 45 min to make a dry mixture, and then stir continuously until naturally cooled to obtain 5 kg of dry mixture, which is the special slag-forming agent for the production of high aluminum zinc alloy. The particle size of the slag-forming agent is 390 μm and the moisture content is 0.18%; (2) Preparation of high aluminum zinc alloy: Take the following raw materials with the following weight percentages: 53% aluminum ingot, 45.12% zinc ingot, 1.8% silicon, and 0.08% rare earth, with a total weight of 1 t, and add them to a 10 t coreless induction furnace. Heat the furnace until the metal is completely melted. During the melting process, add 5 kg of borax (Na2B4O7·10H2O) to reduce oxidation during the metal melting process. (3) Slag formation: The slag-forming agent is sprinkled onto the surface of the completely molten zinc alloy liquid. The amount of slag-forming agent added is 0.3% of the mass of the molten zinc alloy liquid. Stir continuously to ensure that the slag-forming agent is fully in contact with the zinc alloy liquid and to carry out the slag-forming reaction. The molten zinc alloy liquid is kept at 650℃ for 20 minutes. The slag formed by the slag-forming reaction continuously floats to the surface. (4) Heating: Sprinkle high-gluten flour and wheat bran evenly on the surface of the molten slag and stir continuously to rapidly raise the surface slag temperature to the interface temperature of the CaO-AlCl3-SiO2 basic slag system of 850℃. The surface of the alloy liquid will eventually generate fluffy slag, which is convenient for slag removal until the slag and liquid are completely separated. Use a blower to extract the small amount of smoke generated by the slag-making reaction. (5) Slag removal: Remove the loose slag from the surface of the zinc alloy liquid.

[0033] Based on process calculations and product testing, this embodiment achieved a final slag removal efficiency of 80.79%, a direct recovery rate of 90.65%, an alloy melt temperature of 680℃, a slag temperature of 703℃, a high-alumina zinc alloy casting qualification rate of 95%, a slag ratio after high-alumina zinc alloy remelting of 6.1%, and a flue gas dust content of 60 mg / m³. 3 .

[0034] Comparative Example 1: (1) Preparation of high aluminum zinc alloy: Take the following raw materials with the following weight percentages: 57% aluminum ingot, 41.53% zinc ingot, 1.4% silicon, and 0.07% rare earth, with a total weight of 1 t, and add them to a 10t coreless induction furnace. Heat the furnace until the metal is completely melted. During the melting process, add 5 kg of borax (Na2B4O7·10H2O) to reduce oxidation during the metal melting process. (2) Slag formation: Ammonium chloride is sprinkled onto the surface of the completely molten zinc alloy liquid. The amount of slag-forming agent added is 0.5% of the mass of the molten zinc alloy liquid. Stir continuously to ensure that the slag-forming agent is fully in contact with the zinc alloy liquid and to carry out the slag-forming reaction. During this process, a large amount of white smoke is emitted. The molten zinc alloy liquid is kept at 700℃ for 15 minutes. (3) Heating: Sprinkle high-gluten flour and wheat bran evenly on the surface of the molten slag, and stir continuously to raise the temperature to 850°C. The surface of the alloy liquid is always a viscous molten slag. (4) Slag removal: Remove the slag from the surface of the zinc alloy liquid.

[0035] Based on process calculations and product testing, Comparative Example 1 achieved a final slag removal efficiency of 20.33%, a direct recovery rate of 89.39%, an alloy melt temperature of 680℃, a slag temperature of 683℃, a high-alumina zinc alloy casting qualification rate of 60%, a slag rate after high-alumina zinc alloy remelting of 8.2%, and a flue gas dust content of 700 mg / m³. 3 .

[0036] Comparative Example 2: Using a slag-forming agent formulation outside the scope of this application, the specific processing is as follows: Treatment A: Change the slag-forming agent ratio to: CaO 20%, AlCl3 49%, Na2CO3 25%, SiO 25%, CaF 21% by mass percentage. All other steps are the same as in Example 1. Treatment B: The slag-forming agent ratio is changed to: CaO 64%, AlCl3 10%, Na2CO3 20%, SiO2 5%, CaF2 1% by mass percentage. All other steps are the same as in Example 1. Treatment C: The slag-forming agent ratio is changed to: CaO 36%, AlCl3 18%, Na2CO3 40%, SiO2 5%, CaF2 1% by mass percentage. All other steps are the same as in Example 1. Treatment D: Change the slag-forming agent ratio to: CaO 34%, AlCl3 17%, Na2CO3 20%, SiO2 28%, CaF2 1% by mass percentage. All other steps are the same as in Example 1. Treatments A, B, C, and D respectively adjusted the component ratio of the slag-forming agent. According to the data in Table 1, when the slag-forming agent components exceeded the limits of this application, the slag removal efficiency and casting qualification rate both decreased to varying degrees, verifying the rationality and inventiveness of the technical solution of this application.

[0037] Data Analysis: Table 1 Comparison of high-aluminum zinc alloy preparation under different treatments in this application The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A slag-forming agent specifically for the production of high-alumina zinc alloys, wherein the high-alumina zinc alloy contains 25-65 wt% aluminum, 1-2 wt% silicon, 0.05-0.1 wt% rare earth elements, and zinc is supplemented to 100 wt%; Its features are, The slagging agent for high-aluminum zinc alloy production, by weight percentage, consists of the following components: Calcium oxide (CaO) 30%-60%; Aluminum chloride (AlCl3) 15%-30%; Sodium carbonate (Na2CO3) 10%-30%; 5%-10% silicon dioxide (SiO2); Flux 0.5-2%; The flux includes calcium fluoride (CaF2) and / or cryolite powder (Na3AlF6).

2. The slagging agent for high-alumina zinc alloy production according to claim 1, characterized in that, The mass ratio of calcium oxide (CaO) to aluminum chloride (AlCl3) is 2:

1.

3. The slagging agent for high-alumina zinc alloy production according to claim 1, characterized in that, The flux is at least one of calcium fluoride (CaF2) or cryolite powder (Na3AlF6).

4. The slagging agent for high-aluminum zinc alloy production according to claims 1-3, characterized in that, The slag-forming agent specifically for the production of high-alumina zinc alloys has a particle size of 150-500 μm and a moisture content of ≤0.2%.

5. A slagging agent for high-aluminum zinc alloy production according to claims 1-3, characterized in that, The slag-forming temperature of the special slag-forming agent for high-aluminum zinc alloy production is 650-700℃.

6. A method for preparing a slagging agent specifically for the production of high-alumina zinc alloys, characterized in that, Includes the following steps: (1) Weigh the following components according to the weight ratio: 30%-60% calcium oxide, 15%-30% aluminum chloride, 10%-30% sodium carbonate, 5%-10% silicon dioxide, and 0.5%-2% calcium fluoride and / or cryolite powder; (2) Stir at 80-120℃ for 30-45 min to prepare a dry mixture; (3) Continue stirring until it cools naturally to obtain the special slagging agent for the production of high aluminum zinc alloy.

7. A method of using the slagging agent for high-alumina zinc alloy production as described in any one of claims 1-4, characterized in that, Includes the following steps: (1) Alloy smelting: Weigh aluminum ingots, zinc ingots, industrial silicon and rare earth raw materials according to the proportion of high aluminum zinc alloy, add them to a 10 t coreless induction furnace, heat the furnace until the metal is completely melted, and add borax (Na2B4O7·10H2O) during the melting process. (2) Slag-forming reaction: The slag-forming agent for the production of high-aluminum zinc alloy is sprinkled onto the surface of the completely molten alloy liquid. The amount of slag-forming agent added is 0.3%-0.5% of the mass of the alloy liquid. Stir to make the slag-forming agent fully contact the alloy liquid, and keep it at 650-700℃ for 15-20 min to make the slag formed by the slag-forming reaction float to the surface. (3) Heating and separation: The biomass heating agent is evenly sprinkled onto the surface of the molten slag and stirred to rapidly raise the temperature of the molten slag to 850-900℃, generating loose slag; (4) Slag removal: The loose slag is removed to achieve slag-liquid separation.

8. The method of using the slagging agent for high-alumina zinc alloy production according to claim 7, characterized in that, In step (1), the amount of borax added is 0.4%-0.8% of the total mass of the high-aluminum zinc alloy.

9. The method of using the slagging agent for high-alumina zinc alloy production according to claim 7, characterized in that, In step (3), the biomass heating agent is at least one of high-gluten flour or wheat bran.

10. The method of using the slagging agent for high-aluminum zinc alloy production according to claim 7, characterized in that, In step (2), the amount of slag-forming agent added is 3-5 kg ​​for every 1 t of high-aluminum zinc alloy smelted.

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