阅读说明：本技术 一种锌铝镁合金浇铸装置及方法 (Zinc-aluminum-magnesium alloy casting device and method ) 是由 丁旭 邓远久 韩朝云 余振武 陈昌将 窦鉴 刘凡 班新 胡如忠 吴红林 张云豹 于 2021-08-03 设计创作，主要内容包括：本发明涉及一种锌铝镁合金浇铸装置及方法,属于金技术领域,本发明采用在浇铸前,向锭模内腔均匀撒入硫磺,在浇铸时硫磺能够消耗残氧,生成的二氧化硫能够隔绝氧气,并利用滑石粉做为覆盖剂以及通过均匀充满锭模内空间的惰性气体,达到隔绝空气防止氧化的目的,并且,氯化锌在浇铸时熔化形成“水封”,使锭模内形成一个独立的空间,防止空气进入,达到隔绝空气防止氧化的目的,保证能够稳定生产合格的锌铝镁合金。(The invention relates to a zinc-aluminum-magnesium alloy casting device and a method, belonging to the technical field of gold, wherein before casting, sulfur is uniformly scattered into an inner cavity of an ingot mold, the sulfur can consume residual oxygen during casting, generated sulfur dioxide can isolate oxygen, talcum powder is used as a covering agent and inert gas which uniformly fills the space in the ingot mold is used for isolating air and preventing oxidation, and zinc chloride is melted to form a water seal during casting, so that an independent space is formed in the ingot mold, air is prevented from entering, the purpose of isolating air and preventing oxidation is achieved, and qualified zinc-aluminum-magnesium alloy can be stably produced.)

1. The zinc-aluminum-magnesium alloy casting device is characterized by comprising a water tank (1), a water tank water inlet pipe (2), an ingot mold (3), a U-shaped clamping groove (4), an ingot mold cover (5), an inert gas inlet (7), an inert gas pipeline (8), an inert gas nozzle (9), a funnel (11), a feeding valve (12) and an alloy casting opening cover (13); a water tank water inlet pipe (2) is arranged on the side wall of one side of the water tank (1), an ingot mold (3) is arranged in the water tank (1), a U-shaped clamping groove (4) capable of containing zinc chloride with the height of 10-30 mm is formed in the edge of an opening at the top of the ingot mold (3), an ingot mold cover (5) is connected in the U-shaped clamping groove (4) in a clamping mode, an inert gas pipeline (8) located in the cavity of the ingot mold (3) is arranged at the bottom of the ingot mold cover (5), an inert gas nozzle (9) is arranged on the inert gas pipeline (8), and an inert gas inlet (7) communicated with the inert gas pipeline (8) penetrates out of the top of the ingot mold cover (5); an alloy casting opening (10) communicated with the inner cavity of the ingot mold (3) is formed in the ingot mold cover (5), an alloy casting opening cover (13) is arranged on the alloy casting opening (10), a funnel (11) used for adding talcum powder into the funnel (11) is further arranged on the ingot mold cover (5), and a feeding valve (12) is arranged at a discharge hole of the funnel (11).

2. The zinc-aluminum-magnesium alloy casting device according to claim 1, wherein: the ingot mould cover (5) is also provided with an observation hole (14).

3. The zinc-aluminum-magnesium alloy casting device according to claim 1, wherein: the left side and the right side of the top of the ingot mold cover (5) are respectively provided with a pair of handles (6).

4. The zinc-aluminum-magnesium alloy casting apparatus according to any one of claims 1 to 3, wherein: the inert gas pipelines (8) are L-shaped, the number of the L-shaped inert gas pipelines (8) is two, the two L-shaped inert gas pipelines are respectively installed at the bottom of the square ingot mold cover (5), the two L-shaped inert gas pipelines (8) surround the bottom of the square ingot mold cover (5) for one circle, and each section of branch pipe of each L-shaped inert gas pipeline (8) is provided with an inert gas spray head (9).

5. A zinc-aluminum-magnesium alloy casting method is characterized by comprising the following steps: the method comprises the following specific steps:

1) uniformly scattering 1-3 mm of sulfur in the inner cavity of the ingot mold (3), adding production water into the water tank (1), stopping adding the production water when the water reaches 85-95% of the height of the ingot mold (3), filling zinc chloride with the height of 10-30 mm into the U-shaped clamping groove (4), then clamping the ingot mold cover (5) into the U-shaped clamping groove (4), covering the alloy casting opening cover (13), adding talcum powder into the inner cavity of the ingot mold (3) from the funnel (11), and preparing for casting;

2) and (3) zinc sheet preparation: aluminum ingot: the magnesium ingot is proportioned according to the weight ratio and then smelted to form zinc-aluminum-magnesium alloy melt;

3) opening an inert gas valve, spraying inert gas into the ingot mold (8) from an inert gas nozzle (9) through an inert gas pipeline (8) from an inert gas inlet (7), and spraying the inert gas for 1-3 minutes;

4) opening an alloy pouring gate cover (13), connecting a pouring pipeline to an alloy pouring gate (10), and then, allowing the zinc-aluminum-magnesium alloy melt obtained by smelting in the step 2) to flow into the ingot mold (3) from the pouring pipeline, wherein when the volume of the zinc-aluminum-magnesium alloy melt reaches 20-30% of that of the ingot mold (3), talcum powder is added into the ingot mold (3) through a funnel (11); stopping casting and adding talcum powder when the zinc-aluminum-magnesium alloy melt reaches 40-100 mm of the upper end part of the ingot mold (3), and covering an alloy casting opening cover (13);

5) stopping spraying the inert gas after the casting is finished for 10-15 minutes; and opening the ingot mold cover (5) after the casting is finished for 40-60 minutes, pouring a coolant on the zinc-magnesium-aluminum alloy for cooling, cooling for 10-30 minutes, and demolding.

6. The method for casting the zinc-aluminum-magnesium alloy according to claim 5, wherein the casting method comprises the following steps: when casting, the temperature in the U-shaped clamping groove (4) is higher than 290 ℃.

7. The method for casting the zinc-aluminum-magnesium alloy according to claim 5, wherein the casting method comprises the following steps: the inert gas is neon, and the purity is more than or equal to 99.9 percent.

Technical Field

The invention belongs to the technical field of metallurgy, and particularly relates to a zinc-aluminum-magnesium alloy casting device and method.

Background

The zinc-magnesium-aluminum alloy produced at present in China generally contains low magnesium, the magnesium content is below 2%, the zinc is melted at 470-520 ℃ by adopting a power frequency induction furnace in the existing production process, then aluminum is added for melting, the temperature is raised to 520-560 ℃ for melting magnesium, and ammonium chloride is directly cast after slagging.

The patent of application No. 20181003150.3 discloses a zinc-aluminum-magnesium alloy smelting method, which comprises 97.2-97.6% of zinc, 1.4-1.6% of aluminum and 1.1-1.2% of magnesium. In the casting and forming process, the alloy ingot mold is cooled by adopting the cooling circulating water, so that the alloy cooling time is shortened, the segregation phenomenon of magnesium and aluminum is avoided, and the product quality is improved. Because of the low magnesium content, no protection is required during casting. The process technology can not be directly used for casting the zinc-aluminum-magnesium alloy containing more than 2% of magnesium, oxidation can occur during casting, the surface is blackened, and qualified products cannot be produced.

The patent application No. 201811157769.9 discloses a titanium and antimony-containing hot-dip galvanized aluminum-magnesium alloy and a preparation method thereof, wherein the hot-dip galvanized aluminum-magnesium alloy contains 2.5-3.5% of magnesium, 10-12% of aluminum, 0.1-0.2% of titanium, 0.1-0.1% of antimony and the balance of zinc. The process comprises the steps of adding pure zinc, pure aluminum, Al-50% of Mg intermediate alloy, Al-5% of Ti intermediate alloy and Al-5% of Sb intermediate alloy into a crucible, heating to 700-720 ℃, adding a covering agent (NaCl + KCl) for melting, refining and deslagging by adopting ZnCl2, cooling to 550 ℃, and casting. The process technology adopts covering agent (NaCl + KCl) to melt and directly cast. The method can not be directly used for smelting the zinc-aluminum-magnesium alloy containing more than 3.5 percent of magnesium, can be oxidized during casting, has blackened surface and can not produce qualified products.

The patent application No. 201410367048.6 discloses a Ti-containing Zn-Al-Mg alloy ingot and a preparation method thereof, which comprises 3-4% of Al, 6-8% of Zn and 88-91% of Al. Oil quenching and cooling are adopted, nitrogen protection is adopted, and die-casting molding is adopted for casting. The process technology can only be used for die-casting.

The zinc-aluminum-magnesium alloy containing 4% of magnesium is required to be produced, and the smelting process of the existing production process adopts an industrial salt covering agent (NaCl + KCl) or is protected by introducing nitrogen, and the zinc-aluminum-magnesium alloy is cast through a slag bath. When the process is used for casting the zinc-aluminum-magnesium alloy, the zinc-aluminum-magnesium alloy is oxidized in an ingot mold, the surface is blackened, and the appearance quality of a product cannot meet the requirement.

Disclosure of Invention

In order to overcome the problems in the background art, the invention provides a zinc-aluminum-magnesium alloy casting device and a zinc-aluminum-magnesium alloy casting method.

In order to realize the purpose, the invention is realized by the following technical scheme:

a zinc-aluminum-magnesium alloy casting device comprises a water tank 1, a water tank water inlet pipe 2, an ingot mold 3, a U-shaped clamping groove 4, an ingot mold cover 5, an inert gas inlet 7, an inert gas pipeline 8, an inert gas nozzle 9, a funnel 11, a feeding valve 12 and an alloy casting opening cover 13; a water tank water inlet pipe 2 is arranged on the side wall of one side of the water tank 1, an ingot mold 3 is arranged in the water tank 1, a U-shaped clamping groove 4 capable of containing zinc chloride with the height of 10-30 mm is arranged at the edge of an opening at the top of the ingot mold 3, an ingot mold cover 5 is clamped in the U-shaped clamping groove 4, an inert gas pipeline 8 positioned in the cavity of the ingot mold 3 is arranged at the bottom of the ingot mold cover 5, an inert gas nozzle 9 is arranged on the inert gas pipeline 8, and an inert gas inlet 7 communicated with the inert gas pipeline 8 penetrates out of the top of the ingot mold cover 5; an alloy pouring gate 10 communicated with the inner cavity of the ingot mold 3 is arranged on the ingot mold cover 5, an alloy pouring gate cover 13 is arranged on the alloy pouring gate 10, a funnel 11 used for adding talcum powder into the funnel 11 is further arranged on the ingot mold cover 5, and a discharge port of the funnel 11 is provided with a feeding valve 12.

Furthermore, the ingot mould cover 5 is also provided with a viewing hole 14.

Furthermore, a pair of handles 6 are respectively arranged on the left side and the right side of the top of the ingot mold cover 5.

Furthermore, the inert gas pipelines 8 are L-shaped, two L-shaped inert gas pipelines 8 are respectively arranged at the bottom of the square ingot mold cover 5, the two L-shaped inert gas pipelines 8 surround the bottom of the square ingot mold cover 5 for one circle, and each section of branch pipe of each L-shaped inert gas pipeline 8 is provided with an inert gas spray head 9.

A zinc-aluminum-magnesium alloy casting method comprises the following specific steps:

1) uniformly scattering 1-3 mm of sulfur in the inner cavity of the ingot mold 3, adding production water into the water tank 1, stopping adding the production water when the water reaches 85-95% of the height of the ingot mold 3, filling zinc chloride with the height of 10-30 mm into the U-shaped clamping groove 4, then clamping the ingot mold cover 5 into the U-shaped clamping groove 4, covering the alloy casting opening cover 13, adding talcum powder into the inner cavity of the ingot mold 3 from the hopper 11, and preparing for casting;

2) and (3) zinc sheet preparation: aluminum ingot: the magnesium ingot is proportioned according to the weight ratio and then smelted to form zinc-aluminum-magnesium alloy melt;

3) opening an inert gas valve, spraying inert gas from an inert gas inlet 7 through an inert gas pipeline 8 from an inert gas nozzle 9 into the ingot mold 3, and spraying the inert gas for 1-3 minutes;

4) opening an alloy pouring gate cover 13, connecting a pouring pipeline to an alloy pouring gate 10, and then, allowing the zinc-aluminum-magnesium alloy melt obtained by smelting in the step 2) to flow into the ingot mold 3 from the pouring pipeline, wherein when the volume of the zinc-aluminum-magnesium alloy melt reaches 20-30% of that of the ingot mold 3, talcum powder is added into the ingot mold 3 through a funnel 11; stopping casting and adding talcum powder when the zinc-aluminum-magnesium alloy melt reaches 40-100 mm of the upper end part of the ingot mold 3, and covering an alloy casting opening cover 13;

5) stopping spraying the inert gas after the casting is finished for 10-15 minutes; and after the casting is finished for 40-60 minutes, opening the ingot mold cover 5, pouring a coolant on the zinc-magnesium-aluminum alloy for cooling, cooling for 10-30 minutes, and demolding.

Furthermore, the temperature in the U-shaped clamping groove 4 is higher than 290 ℃ during casting.

Furthermore, the inert gas is neon, and the purity is more than or equal to 99.9 percent.

The invention has the beneficial effects that:

the invention adopts the method that before casting, sulfur is uniformly scattered into the inner cavity of the ingot mould, the sulfur can consume residual oxygen during casting, generated sulfur dioxide can isolate oxygen, talcum powder is used as a covering agent, and the aim of isolating air and preventing oxidation is achieved by uniformly filling inert gas in the space in the ingot mould.

Drawings

FIG. 1 is a front view of the invention;

fig. 2 is a top view of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention and the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-2, a zinc-aluminum-magnesium alloy casting device comprises a water tank 1, a water tank water inlet pipe 2, an ingot mold 3, a U-shaped clamping groove 4, an ingot mold cover 5, an inert gas inlet 7, an inert gas pipeline 8, an inert gas nozzle 9, a funnel 11, a feeding valve 12 and an alloy casting cover 13.

A water tank water inlet pipe 2 is arranged on the side wall of one side of a water tank 1, an ingot mold 3 is arranged in the water tank 1, a U-shaped clamping groove 4 is formed in the edge of an opening at the top of the ingot mold 3, an ingot mold cover 5 is clamped in the U-shaped clamping groove 4, zinc chloride is filled into the U-shaped clamping groove 4 before zinc-aluminum-magnesium alloy casting, the height of the zinc chloride is 10-30 mm, and then the ingot mold cover 5 is clamped into the U-shaped clamping groove 4. During casting, the temperature in the U-shaped clamping groove 4 can reach more than 290 ℃, zinc chloride is molten to be liquid, water seal is formed, an independent space can be formed in an isolated ingot mould well, air is prevented from entering, and the purpose of isolating air and preventing oxidation is achieved. An inert gas pipeline 8 positioned in the cavity of the ingot mold 3 is arranged at the bottom of the ingot mold cover 5, an inert gas nozzle 9 is arranged on the inert gas pipeline 8, and an inert gas inlet 7 communicated with the inert gas pipeline 8 penetrates out of the top of the ingot mold cover 5; the ingot mould cover 5 is provided with an alloy casting gate 10 communicated with the inner cavity of the ingot mould 3, the alloy casting gate 10 is provided with an alloy casting gate cover 13, and the alloy casting gate cover 13 is conical, so that the alloy casting gate 10 can be sealed, and the aim of isolating air and preventing oxidation can be achieved. Still be provided with the funnel 11 that is used for in to funnel 11 on the ingot mould lid 5, the discharge gate of funnel 11 is provided with charging valve 12, and zinc-aluminium magnesium alloy melt flows into ingot mould 3 from the casting pipeline, and when zinc-aluminium magnesium alloy melt reached 20 ~ 30%, open the charging valve 12 of funnel 11 lower part, and the talcum powder is in the feeding valve 12 gets into ingot mould 3, and the talcum powder mainly is as the covering agent, reaches the purpose that isolated air prevented the oxidation.

Before casting, production water is added into the water tank 1 through the water tank water inlet pipe 2, so that the ingot mold 3 can be cooled in the casting process, the cooling speed of a zinc alloy ingot is increased, and the magnesium oxidation burning loss is reduced.

The ingot mould cover 5 is also provided with an observation hole 14. The observation hole 14 is transparent glass with the diameter of 50-100 mm, so that the observation of the casting condition of the zinc-magnesium-aluminum alloy in the ingot mold 3 is facilitated, and the addition amount of the talcum powder and the casting end point are controlled.

The left side and the right side of the top of the ingot mold cover 5 are respectively provided with a pair of handles 6, and the ingot mold cover 5 can be conveniently covered on the U-shaped clamping groove 4 and taken down from the U-shaped clamping groove 4 by arranging the two pairs of handles 6.

The inert gas pipeline 8 is L-shaped, the number of the L-shaped inert gas pipelines 8 is two, the two L-shaped inert gas pipelines are respectively installed at the bottom of the square ingot mold cover 5, the two L-shaped inert gas pipelines 8 surround the bottom of the square ingot mold cover 5 for a circle, an inert gas nozzle 9 is arranged on each section of branch pipe of the L-shaped inert gas pipeline 8, the inert gas nozzles 9 are straight-through pipes with variable diameters, and the nozzles are thinner than inlets and can form acceleration. Six inert gas nozzles 9 are symmetrically arranged in the length direction of the ingot mould 3, and three inert gas nozzles are symmetrically arranged in the width direction, so that the inert gas can quickly and uniformly fill the space in the ingot mould 3. The inert gas sprayed by the inert gas nozzle 9 is neon, the purity is more than or equal to 99.9 percent, the neon has higher specific gravity than air, is more favorable for sinking to the liquid surface and can isolate oxygen, the inert gas sprayed by the inert gas nozzle 9 can uniformly cover the liquid surface and can isolate oxygen, and the protection effect on the zinc-aluminum-magnesium alloy melt is achieved. Moreover, neon is a byproduct of oxygen or nitrogen production, the production cost is low, and inert gas can isolate air to prevent oxidation.

A zinc-aluminum-magnesium alloy casting method comprises the following specific steps:

1) uniformly scattering 1-3 mm of sulfur in the inner cavity of the ingot mold 3, adding production water into the water tank 1, stopping adding the production water when the water reaches 85-95% of the height of the ingot mold 3, filling zinc chloride with the height of 10-30 mm into the U-shaped clamping groove 4, then clamping the ingot mold cover 5 into the U-shaped clamping groove 4, covering the alloy casting opening cover 13, adding talcum powder into the inner cavity of the ingot mold 3 from the hopper 11, and preparing for casting;

2) and (3) zinc sheet preparation: aluminum ingot: the magnesium ingot is proportioned according to the weight ratio and then smelted to form zinc-aluminum-magnesium alloy melt;

3) opening an inert gas valve, spraying inert gas from an inert gas inlet 7 through an inert gas pipeline 8 from an inert gas nozzle 9 into the ingot mold 3, and spraying the inert gas for 1-3 minutes;

4) opening an alloy pouring gate cover 13, connecting a pouring pipeline to an alloy pouring gate 10, and then, allowing the zinc-aluminum-magnesium alloy melt obtained by smelting in the step 2) to flow into the ingot mold 3 from the pouring pipeline, wherein when the volume of the zinc-aluminum-magnesium alloy melt reaches 20-30% of that of the ingot mold 3, talcum powder is added into the ingot mold 3 through a funnel 11; stopping casting and adding talcum powder when the zinc-aluminum-magnesium alloy melt reaches 40-100 mm of the upper end part of the ingot mold 3, and covering an alloy casting opening cover 13;

5) stopping spraying the inert gas after the casting is finished for 10-15 minutes; and after the casting is finished for 40-60 minutes, opening the ingot mold cover 5, pouring a coolant on the zinc-magnesium-aluminum alloy for cooling, cooling for 10-30 minutes, and demolding.

Example 1

Sulfur is uniformly scattered into the inner cavity of the ingot mould 3 for 1 mm. Then, the production water valve is opened, the production water enters the water tank 1 from the water tank inlet pipe 2, and when the water reaches 85% of the height of the ingot mold 3, the production water valve is closed. And (3) filling zinc chloride into the U-shaped clamping groove 4 with the height of 10mm, then clamping the ingot mold cover 5 into the U-shaped clamping groove 4, and covering the alloy casting cover 13. Talc was added to funnel 11. And preparing before casting. And (3) zinc sheet preparation: aluminum ingot: and (3) proportioning the magnesium ingots according to the weight ratio, smelting, sampling, analyzing and determining to be qualified, and preparing for casting. An inert gas valve is opened, and inert gas is sprayed into the ingot mold 3 from an inert gas nozzle 9 through an inert gas pipeline 8 from an inert gas inlet 7 for 1 minute. The alloy pouring port cover 13 is opened, and the pouring pipe is connected to the alloy pouring port 10. The zinc-aluminum-magnesium alloy melt flows into the ingot mold 3 from the casting pipeline, sulfur dioxide is generated by the sulfur and residual oxygen at a high temperature state, the residual oxygen and magnesium are prevented from reacting to produce magnesium oxide, and the generated sulfur dioxide can isolate oxygen. When the observation hole 14 observes that the molten zinc-aluminum-magnesium alloy reaches 20%, the feeding valve 12 at the lower part of the funnel 11 is opened, the talcum powder enters the ingot mold 3 from the feeding valve 12, and at the moment, the zinc chloride is melted into a liquid state to form a water seal, so that a gap between the U-shaped clamping groove 4 and the alloy pouring gate cover 13 can be sealed. When the molten zinc-aluminum-magnesium alloy reaches 40mm from the upper end of the ingot mold 3 through the observation hole 14, the casting is stopped. And (4) closing a feeding valve 12 at the lower part of the hopper 11, stopping adding the talcum powder and covering an alloy pouring gate cover 13. And after the casting is finished for 10 minutes, closing the inert gas valve and stopping spraying the inert gas. And after the casting is finished for 40 minutes, opening the ingot mold cover 5, pouring a coolant on the zinc-magnesium-aluminum alloy for cooling, cooling for 10 minutes, demolding, and forking the zinc-aluminum-magnesium alloy to a product area by using a forklift for stacking. The process is simple to operate and easy to control, and can stably produce the qualified zinc-aluminum-magnesium alloy.

Example 2

2mm of sulfur is uniformly scattered into the inner cavity of the ingot mould 3. Then, a production water valve is opened, the production water enters the water tank 1 from the water tank inlet pipe 2, and when the water reaches 90% of the height of the ingot mold 3, the production water valve is closed. And (3) filling zinc chloride into the U-shaped clamping groove 4 with the height of 20mm, then clamping the ingot mold cover 5 into the U-shaped clamping groove 4, and covering the alloy casting cover 13. Talc was added to funnel 11. And preparing before casting. And (3) zinc sheet preparation: aluminum ingot: and (3) proportioning the magnesium ingots according to the weight ratio, smelting, sampling, analyzing and determining to be qualified, and preparing for casting. An inert gas valve is opened, and inert gas is sprayed into the ingot mold 3 from an inert gas nozzle 9 through an inert gas pipeline 8 from an inert gas inlet 7 for 2 minutes. The alloy pouring port cover 13 is opened, and the pouring pipe is connected to the alloy pouring port 10. The zinc-aluminum-magnesium alloy melt flows into the ingot mold 3 from the casting pipeline, sulfur dioxide is generated by the sulfur and residual oxygen at a high temperature state, the residual oxygen and magnesium are prevented from reacting to produce magnesium oxide, and the generated sulfur dioxide can isolate oxygen. When the observation hole 14 observes that the molten zinc-aluminum-magnesium alloy reaches 25%, the feeding valve 12 at the lower part of the funnel 11 is opened, the talcum powder enters the ingot mold 3 from the feeding valve 12, and at the moment, the zinc chloride is melted into a liquid state to form a water seal, so that a gap between the U-shaped clamping groove 4 and the alloy pouring gate cover 13 can be sealed. When the molten zinc-aluminum-magnesium alloy reaches 70mm from the upper end of the ingot mold 3 through the observation hole 14, the casting is stopped. And (4) closing a feeding valve 12 at the lower part of the hopper 11, stopping adding the talcum powder and covering an alloy pouring gate cover 13. And after the casting is finished for 10-15 minutes, closing the inert gas valve and stopping spraying the inert gas. And opening the ingot mold cover 5 after the casting is finished for 50 minutes, pouring a coolant on the zinc-magnesium-aluminum alloy for cooling, cooling for 20 minutes, demolding, and forking the zinc-aluminum-magnesium alloy to a product area by using a forklift for stacking. The process is simple to operate and easy to control, and can stably produce the qualified zinc-aluminum-magnesium alloy.

Example 3

3mm of sulfur is uniformly scattered into the inner cavity of the ingot mould 3. Then, the production water valve is opened, the production water enters the water tank 1 from the water tank inlet pipe 2, and when the water reaches 95% of the height of the ingot mold 3, the production water valve is closed. And (3) filling zinc chloride into the U-shaped clamping groove 4 with the height of 30mm, then clamping the ingot mold cover 5 into the U-shaped clamping groove 4, and covering the alloy casting cover 13. Talc was added to funnel 11. And preparing before casting. And (3) zinc sheet preparation: aluminum ingot: and (3) proportioning the magnesium ingots according to the weight ratio, smelting, sampling, analyzing and determining to be qualified, and preparing for casting. An inert gas valve is opened, and inert gas is sprayed into the ingot mold 3 from an inert gas nozzle 9 through an inert gas pipeline 8 from an inert gas inlet 7 for 3 minutes. The alloy pouring port cover 13 is opened, and the pouring pipe is connected to the alloy pouring port 10. The zinc-aluminum-magnesium alloy melt flows into the ingot mold 3 from the casting pipeline, sulfur dioxide is generated by the sulfur and residual oxygen at a high temperature state, the residual oxygen and magnesium are prevented from reacting to produce magnesium oxide, and the generated sulfur dioxide can isolate oxygen. When the observation hole 14 observes that the molten zinc-aluminum-magnesium alloy reaches 30%, the feeding valve 12 at the lower part of the funnel 11 is opened, the talcum powder enters the ingot mold 3 from the feeding valve 12, and at the moment, the zinc chloride is melted into a liquid state to form a water seal, so that a gap between the U-shaped clamping groove 4 and the alloy pouring gate cover 13 can be sealed. When the molten zinc-aluminum-magnesium alloy reaches 100mm from the upper end of the ingot mold 3 through the observation hole 14, the casting is stopped. And (4) closing a feeding valve 12 at the lower part of the hopper 11, stopping adding the talcum powder and covering an alloy pouring gate cover 13. And after the casting is finished for 15 minutes, closing the inert gas valve and stopping spraying the inert gas. And after casting is finished for 60 minutes, opening the ingot mold cover 5, pouring a coolant on the zinc-magnesium-aluminum alloy for cooling, cooling for 30 minutes, demolding, and forking the zinc-aluminum-magnesium alloy to a product area by using a forklift for stacking. The process is simple to operate and easy to control, and can stably produce the qualified zinc-aluminum-magnesium alloy.

Finally, it is noted that the above-mentioned embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.