Refining agent for smelting dross of hot-dip galvanized aluminum-magnesium alloy as well as preparation method and slagging method thereof

Abstract

The invention provides a hot-dip galvanized aluminum magnesium alloy smelting scum refiner which comprises the following components in percentage by mass: 25 to 30 percent of charcoal dust, 10 to 15 percent of ammonium chloride, 10 to 15 percent of cryolite, 10 to 15 percent of sodium chloride, 10 to 15 percent of zinc chloride, 5 to 10 percent of potassium chloride and 5 to 10 percent of magnesium chloride. The invention further provides a preparation method and a slagging method of the hot-dip galvanized aluminum magnesium alloy smelting scum refiner. According to the hot-dip galvanized aluminum magnesium alloy smelting dross refiner and the preparation method and slagging method thereof, dross generated in hot-dip galvanized aluminum magnesium alloy smelting can be fully dispersed and refined, and entrainment of particle metal in the dross can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of alloy smelting slag refiners, and in particular to a hot-dip galvanized aluminum-magnesium alloy smelting slag refiner and a preparation method and a slag making method thereof. Background Art

[0002] In the production of hot-dip galvanized aluminum-magnesium alloy in China, since the smelting is carried out in an open environment without protective atmosphere, and the metal magnesium is severely oxidized during smelting, a lot of scum will be formed during the smelting process of hot-dip galvanized aluminum-magnesium alloy. The scum is viscous and not easy to disperse to form lumps, as shown in Figure 8 As shown in the figure, since the slag carries a lot of granular metal, salvaging the slag on the surface during the casting process will cause a large amount of valuable metal waste, resulting in a low direct metal recovery rate.

[0003] However, the use of existing slag reducing agents (also known as slag beating agents, slag forming agents or slag refiners) has no obvious effect on improving the above-mentioned defect of slag agglomeration and difficulty in dispersion. Fig. 9 The effect of existing alkali slag agents in treating slag is not obvious.

[0004] Therefore, there is an urgent need for a hot-dip galvanized aluminum-magnesium alloy smelting slag refiner that can fully disperse and refine the slag produced in the hot-dip galvanized aluminum-magnesium alloy smelting and reduce the entrainment of particulate metal, as well as a preparation method and a slag making method thereof. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a hot-dip galvanized aluminum-magnesium alloy smelting slag refiner, which can fully disperse and refine the slag produced in the hot-dip galvanized aluminum-magnesium alloy smelting and reduce the entrainment of particulate metal, as well as a preparation method and a slag making method.

[0006] To solve the above technical problems, the present invention provides a hot-dip galvanized aluminum-magnesium alloy smelting slag refiner, which includes, by mass percentage, 25-30wt% of charcoal powder, 10-15wt% of ammonium chloride, 10-15wt% of cryolite, 10-15wt% of sodium chloride, 10-15wt% of zinc chloride, 5-10wt% of potassium chloride, and 5-10wt% of magnesium chloride.

[0007] Preferably, in terms of mass percentage, the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner includes 30wt% charcoal powder, 15wt% ammonium chloride, 15wt% cryolite, 12wt% sodium chloride, 13wt% zinc chloride, 5wt% potassium chloride, and 10wt% magnesium chloride.

[0008] Preferably, in terms of mass percentage, the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner includes 28wt% charcoal powder, 15wt% ammonium chloride, 15wt% cryolite, 10wt% sodium chloride, 12wt% zinc chloride, 10wt% potassium chloride, and 10wt% magnesium chloride.

[0009] Preferably, in terms of mass percentage, the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner includes 25wt% charcoal powder, 15wt% ammonium chloride, 13wt% cryolite, 15wt% sodium chloride, 13wt% zinc chloride, 10wt% potassium chloride, and 9wt% magnesium chloride.

[0010] Preferably, in terms of mass percentage, the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner includes 30wt% charcoal powder, 13wt% ammonium chloride, 15wt% cryolite, 13wt% sodium chloride, 13wt% zinc chloride, 8wt% potassium chloride, and 8wt% magnesium chloride.

[0011] Preferably, in terms of mass percentage, the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner includes 25wt% charcoal powder, 15wt% ammonium chloride, 15wt% cryolite, 15wt% sodium chloride, 10wt% zinc chloride, 10wt% potassium chloride, and 10wt% magnesium chloride.

[0012] The present invention also provides a method for preparing a hot-dip galvanized aluminum-magnesium alloy smelting slag refiner. According to the components of the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner and their mass percentage contents, the components are evenly mixed to obtain the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner.

[0013] The present invention also provides a slag making method for a hot-dip galvanized aluminum-magnesium alloy smelting slag refiner. When a cored induction furnace is used to produce a hot-dip galvanized aluminum-magnesium alloy, the smelting temperature is controlled at 530°C-590°C, and the amount of the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner is 0.1-0.2wt% of the mass of the smelted hot-dip galvanized aluminum-magnesium alloy.

[0014] Furthermore, when hot-dip galvanized aluminum-magnesium alloy is produced by a coreless induction furnace, the smelting temperature is controlled at 630°C-720°C, and the amount of the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner is 0.1-0.2wt% of the mass of the smelted hot-dip galvanized aluminum-magnesium alloy.

[0015] Furthermore, when hot-dip galvanized aluminum-magnesium alloy is produced by a reverberatory furnace, the smelting temperature is controlled at 650°C-800°C, and the amount of the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner is 0.15-0.25wt% of the mass of the smelted hot-dip galvanized aluminum-magnesium alloy.

[0016] The invention provides a hot-dip galvanized aluminum-magnesium alloy smelting slag refiner, which utilizes the heat generated by the charcoal powder and ammonium chloride in the components during the slag-making reaction to maintain the temperature of the hot-dip galvanized aluminum-magnesium alloy smelting slag and helps to ensure the separation effect of the slag. In addition, the cryolite and chlorides such as zinc chloride and magnesium chloride in the components can effectively reduce the surface tension and interfacial tension principle between the liquid metal and the oxide, so that the oxide in the hot-dip galvanized aluminum-magnesium alloy smelting slag is better separated from the liquid metal, thereby refining and dispersing the hot-dip galvanized aluminum-magnesium alloy smelting slag. At the same time, the ammonium chloride in the components reacts during slag-making to generate gas escape, which also has a certain stirring effect on the hot-dip galvanized aluminum-magnesium alloy smelting slag, and can further promote the separation of the slag and the liquid metal.

[0017] Therefore, the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner provided by the present invention can better separate the oxides in the hot-dip galvanized aluminum-magnesium alloy slag from the liquid metal through the selection of components and the control of the component content, thereby achieving the refinement and dispersion of the hot-dip galvanized aluminum-magnesium alloy slag, effectively reducing the entrainment of slag to particulate metal, avoiding the waste of a large amount of valuable metal caused by salvaging surface slag when smelting and casting products, improving the direct recovery rate of metal, and improving economic benefits.

[0018] Furthermore, the preparation method of the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner provided by the present invention only requires fully and evenly mixing the components and their contents. The preparation method is very simple, can save energy and reduce consumption, and improve economic benefits.

[0019] At the same time, the slag making method of the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner provided by the present invention can directly add the slag refiner into the smelted hot-dip galvanized aluminum-magnesium alloy. Not only is the use method simple and convenient, but the amount of slag refiner used is also relatively small, and its amount does not exceed 0.25wt% of the mass of the hot-dip galvanized aluminum-magnesium alloy, with low use cost and high economic benefit. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A microscopic schematic diagram of slag produced by the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner provided in Example 1 of the present invention during hot-dip galvanized aluminum-magnesium alloy smelting;

[0021] Figure 2 A microscopic schematic diagram of slag produced by the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner provided in Example 2 of the present invention during hot-dip galvanized aluminum-magnesium alloy smelting;

[0022] Figure 3 A microscopic schematic diagram of slag produced by the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner provided in Example 3 of the present invention during hot-dip galvanized aluminum-magnesium alloy smelting;

[0023] Figure 4A microscopic schematic diagram of slag produced by the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner provided in Example 4 of the present invention during hot-dip galvanized aluminum-magnesium alloy smelting;

[0024] Figure 5 A microscopic schematic diagram of slag produced by the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner provided in Example 5 of the present invention during hot-dip galvanized aluminum-magnesium alloy smelting;

[0025] Figure 6 A microscopic schematic diagram of slag produced by the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner provided in Comparative Example 1 of the present invention in the hot-dip galvanized aluminum-magnesium alloy smelting;

[0026] Figure 7 A microscopic schematic diagram of slag produced by the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner provided in Comparative Example 2 of the present invention in the hot-dip galvanized aluminum-magnesium alloy smelting;

[0027] Figure 8 It is a microscopic schematic diagram of slag produced during the hot-dip galvanized aluminum-magnesium alloy smelting process in the prior art;

[0028] Fig. 9 This is a microscopic schematic diagram of slag produced by the slag-removing agent in the prior art during hot-dip galvanized aluminum-magnesium alloy smelting. DETAILED DESCRIPTION

[0029] A hot-dip galvanized aluminum-magnesium alloy smelting slag refiner provided in an embodiment of the present invention comprises, by mass percentage, 25-30wt% of charcoal powder, 10-15wt% of ammonium chloride, 10-15wt% of cryolite, 10-15wt% of sodium chloride, 10-15wt% of zinc chloride, 5-10wt% of potassium chloride, and 5-10wt% of magnesium chloride.

[0030] As a preferred specific embodiment of the present invention, the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner includes, by mass percentage, 30wt% of charcoal powder, 15wt% of ammonium chloride, 15wt% of cryolite, 12wt% of sodium chloride, 13wt% of zinc chloride, 5wt% of potassium chloride, and 10wt% of magnesium chloride.

[0031] As a preferred specific embodiment of the present invention, the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner includes, by mass percentage, 28wt% charcoal powder, 15wt% ammonium chloride, 15wt% cryolite, 10wt% sodium chloride, 12wt% zinc chloride, 10wt% potassium chloride, and 10wt% magnesium chloride.

[0032] As a preferred specific embodiment of the present invention, the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner includes, by mass percentage, 25wt% of charcoal powder, 15wt% of ammonium chloride, 13wt% of cryolite, 15wt% of sodium chloride, 13wt% of zinc chloride, 10wt% of potassium chloride, and 9wt% of magnesium chloride.

[0033] As a preferred specific embodiment of the present invention, the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner includes, by mass percentage, 30wt% charcoal powder, 13wt% ammonium chloride, 15wt% cryolite, 13wt% sodium chloride, 13wt% zinc chloride, 8wt% potassium chloride, and 8wt% magnesium chloride.

[0034] As a preferred specific embodiment of the present invention, the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner includes, by mass percentage, 25wt% of charcoal powder, 15wt% of ammonium chloride, 15wt% of cryolite, 15wt% of sodium chloride, 10wt% of zinc chloride, 10wt% of potassium chloride, and 10wt% of magnesium chloride.

[0035] The hot-dip galvanized aluminum-magnesium alloy smelting slag refiner provided by the present invention utilizes the heat generated by the reaction of charcoal powder and ammonium chloride during slag making to maintain the temperature of the hot-dip galvanized aluminum-magnesium alloy smelting slag and helps to ensure the separation effect of the slag. In addition, the cryolite and chlorides such as zinc chloride and magnesium chloride in the components can effectively reduce the surface tension and interfacial tension principle between the liquid metal and the oxide, so that the oxide in the hot-dip galvanized aluminum-magnesium alloy smelting slag is better separated from the liquid metal, thereby refining and dispersing the hot-dip galvanized aluminum-magnesium alloy smelting slag. At the same time, the ammonium chloride reacts during slag making to generate gas escape, which also has a certain stirring effect on the hot-dip galvanized aluminum-magnesium alloy smelting slag, and can further promote the separation of the slag and the liquid metal.

[0036] The invention provides a method for preparing a hot-dip galvanized aluminum-magnesium alloy smelting slag refiner. In terms of mass percentage, 25-30wt% of charcoal powder, 10-15wt% of ammonium chloride, 10-15wt% of cryolite, 10-15wt% of sodium chloride, 10-15wt% of zinc chloride, 5-10wt% of potassium chloride and 5-10wt% of magnesium chloride are uniformly mixed to obtain the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner.

[0037] As an optimal specific embodiment of the present invention, when preparing a hot-dip galvanized aluminum-magnesium alloy smelting slag refiner, 28wt% of charcoal powder, 13wt% of ammonium chloride, 13wt% of cryolite, 13wt% of sodium chloride, 12wt% of zinc chloride, 8wt% of potassium chloride, and 9wt% of magnesium chloride are evenly mixed in mass percentage to obtain a hot-dip galvanized aluminum-magnesium alloy smelting slag refiner.

[0038] The preparation method of the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner provided by the present invention only requires fully and evenly mixing the components and their contents. The preparation method is very simple, can save energy and reduce consumption, and improve economic benefits.

[0039] The present invention provides a slag making method for a hot-dip galvanized aluminum-magnesium alloy smelting slag refiner. When a cored induction furnace is used to produce a hot-dip galvanized aluminum-magnesium alloy, the smelting temperature is controlled at 530°C-590°C, and the amount of the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner is 0.1-0.2wt% of the mass of the smelted hot-dip galvanized aluminum-magnesium alloy.

[0040] When hot-dip galvanized aluminum-magnesium alloy is produced by a coreless induction furnace, the smelting temperature is controlled at 630°C-720°C, and the amount of the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner is 0.1-0.2wt% of the mass of the smelted hot-dip galvanized aluminum-magnesium alloy.

[0041] When hot-dip galvanized aluminum-magnesium alloy is produced by a reverberatory furnace, the smelting temperature is controlled at 650°C-800°C, and the amount of the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner is 0.15-0.25wt% of the mass of the smelted hot-dip galvanized aluminum-magnesium alloy.

[0042] When the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner provided by the present invention is used for slag making, the slag refiner can be directly added to the smelted hot-dip galvanized aluminum-magnesium alloy. Not only is the use method simple and convenient, but the amount of slag refiner used is also relatively small, and its amount does not exceed 0.25wt% of the mass of the hot-dip galvanized aluminum-magnesium alloy, with low use cost and high economic benefit.

[0043] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the examples. It should be understood that the embodiments described herein are only preferred embodiments of the present invention and are not intended to limit the present invention. The raw materials used in the examples and comparative examples are all commercially available.

[0044] Example 1

[0045] The hot-dip galvanized aluminum-magnesium alloy smelting slag refiner S1 of this embodiment is prepared according to the following composition: 30wt% of charcoal powder, 15wt% of ammonium chloride, 15wt% of cryolite, 12wt% of sodium chloride, 13wt% of zinc chloride, 5wt% of potassium chloride, 10wt% of magnesium chloride, and the indispensable impurities brought by the above components.

[0046] In a cored induction furnace, hot-dip galvanized aluminum-magnesium alloy is produced. When the furnace temperature is about 580°C, the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner S1 is used to slag the zinc-aluminum-magnesium alloy. There is less smoke during the slag making process. The amount of the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner added is 0.15wt% of the total amount of zinc-aluminum alloy added to the electric furnace. After the slag making process, the slag is dispersed and powdery. The hot-dip galvanized aluminum-magnesium alloy smelting slag refiner provided by the embodiment of the present invention is used to refine the slag produced after the hot-dip galvanized aluminum-magnesium alloy is smelted. Figure 1 shown.

[0047] The hot-dip galvanized aluminum-magnesium alloy smelting slag refiner provided in the embodiment of the present invention produces 10 kg of slag per ton of hot-dip galvanized magnesium-aluminum alloy.

[0048] Example 2

[0049] The hot-dip galvanized aluminum-magnesium alloy smelting slag refiner S2 of this embodiment is prepared according to the following composition: 28wt% of charcoal powder, 15wt% of ammonium chloride, 15wt% of cryolite, 10wt% of sodium chloride, 12wt% of zinc chloride, 10wt% of potassium chloride, 10wt% of magnesium chloride, and the indispensable impurities brought by the above components.

[0050] In a coreless induction furnace, hot-dip galvanized aluminum-magnesium alloy is produced. When the furnace temperature is about 650°C, the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner S2 is used to slag the zinc-aluminum-magnesium alloy liquid, and less smoke is produced during the slag-making process. The amount of the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner added is 0.1wt% of the total amount of zinc alloy added to the coreless induction furnace. After the slag-making treatment, the slag is dispersed and powdery. The hot-dip galvanized aluminum-magnesium alloy smelting slag refiner provided in the embodiment of the present invention is used to refine the slag produced after the hot-dip galvanized aluminum-magnesium alloy is smelted. Figure 2 shown.

[0051] The hot-dip galvanized aluminum-magnesium alloy smelting slag refiner provided in the embodiment of the present invention produces 9.5 kg of slag per ton of hot-dip galvanized magnesium-aluminum alloy.

[0052] Example 3

[0053] The hot-dip galvanized aluminum-magnesium alloy smelting slag refiner S3 of this embodiment is prepared according to the following composition: 25wt% of charcoal powder, 15wt% of ammonium chloride, 13wt% of cryolite, 15wt% of sodium chloride, 13wt% of zinc chloride, 10wt% of potassium chloride, 9wt% of magnesium chloride, and the indispensable impurities brought by the above components.

[0054] In a coreless induction furnace, zinc-aluminum-magnesium alloy is produced. When the furnace temperature is about 680°C, the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner S3 is used to slag the zinc-aluminum alloy. There is less smoke during the slag making process. The amount of the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner added is 0.1wt% of the total amount of zinc-aluminum alloy added to the coreless induction furnace. After the slag making process, the slag is dispersed and powdery. The hot-dip galvanized aluminum-magnesium alloy smelting slag refiner provided by the embodiment of the present invention is used to refine the slag produced after the hot-dip galvanized aluminum-magnesium alloy is smelted. Figure 3 shown.

[0055] The hot-dip galvanized aluminum-magnesium alloy smelting slag refiner provided in the embodiment of the present invention produces 9.4 kg of slag per ton of hot-dip galvanized magnesium-aluminum alloy.

[0056] Example 4

[0057] The hot-dip galvanized aluminum-magnesium alloy smelting slag refiner S4 of this embodiment is prepared according to the following composition: 30wt% of charcoal powder, 13wt% of ammonium chloride, 15wt% of cryolite, 13wt% of sodium chloride, 13wt% of zinc chloride, 8wt% of potassium chloride, 8wt% of magnesium chloride, and the indispensable impurities brought by the above components.

[0058] In the reverberatory furnace smelting production of hot-dip high-aluminum zinc-aluminum-magnesium alloy, the hot-dip zinc-aluminum-magnesium alloy smelting slag refiner S4 is used to slag the zinc-aluminum-magnesium alloy when the furnace temperature is 780°C, and less smoke is generated during the slag making process. The amount of the hot-dip zinc-aluminum-magnesium alloy smelting slag refiner added is 0.2wt% of the total amount of zinc-aluminum-magnesium alloy in the reverberatory furnace. After the slag making treatment, the slag is dispersed and powdery. The hot-dip zinc-aluminum-magnesium alloy smelting slag refiner provided by the embodiment of the present invention is used to refine the slag produced after the hot-dip zinc-aluminum-magnesium alloy is smelted. Figure 4 shown.

[0059] The hot-dip galvanized aluminum-magnesium alloy smelting slag refiner provided in the embodiment of the present invention produces 9.8 kg of slag per ton of hot-dip galvanized magnesium-aluminum alloy.

[0060] Example 5

[0061] The hot-dip galvanized aluminum-magnesium alloy smelting slag refiner S5 of this embodiment is prepared according to the following composition: 25wt% of charcoal powder, 15wt% of ammonium chloride, 15wt% of cryolite, 15wt% of sodium chloride, 10wt% of zinc chloride, 10wt% of potassium chloride, 10wt% of magnesium chloride, and the indispensable impurities brought by the above components.

[0062] The hot-dip galvanized aluminum-magnesium alloy smelting slag refiner S5 is used in a core induction furnace to perform slag treatment on the zinc-aluminum-magnesium alloy at a furnace temperature of 560°C, and less smoke is generated during the slag-making process. The amount of the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner added is 0.2wt% of the total amount of the zinc-aluminum-magnesium alloy in the core induction furnace. After the slag-making treatment, the slag is dispersed and powdery. The hot-dip galvanized aluminum-magnesium alloy smelting slag refiner provided by the embodiment of the present invention is used to refine the slag produced after the hot-dip galvanized aluminum-magnesium alloy is smelted. Figure 5 shown.

[0063] The hot-dip galvanized aluminum-magnesium alloy smelting slag refiner provided in the embodiment of the present invention produces 9.2 kg of slag per ton of hot-dip galvanized magnesium-aluminum alloy.

[0064] Comparative Example 1

[0065] Ammonium chloride DS1: NH4Cl is used, together with the essential impurities of the components.

[0066] The ammonium chloride DS1 is used to perform slag treatment when the temperature of the zinc-aluminum-magnesium alloy is 650°C. The amount of ammonium chloride DS1 added is 0.15% of the mass of the zinc-aluminum-magnesium alloy liquid. A large amount of smoke and dust is generated during the slag-making process. At the same time, the smoke and dust contain a large amount of chlorine and have a pungent smell. The slag and liquid are not separated thoroughly, and the zinc-aluminum-magnesium alloy slag is in a block shape. The hot-dip galvanized aluminum-magnesium alloy smelting slag refiner provided in this comparative example produces slag such as Figure 6 shown.

[0067] Since the composition of the slag refiner for hot-dip galvanized aluminum-magnesium alloy smelting provided in Comparative Example 1 is completely different from that of Examples 1-5 of the present invention, the slag produced by the slag refiners of Comparative Example 1 and Examples 1-5 of the present invention after hot-dip galvanized aluminum-magnesium alloy smelting is also significantly different. Figure 1-5 and Figure 6 From the comparison, it can be seen that the slag produced by the slag refiner of Comparative Example 1 after hot-dip galvanized aluminum-magnesium alloy smelting is in block shape, and the slag-liquid separation is obviously incomplete. The slag is easy to entrain more particulate metals, which is easy to waste a large amount of valuable metals, resulting in a low direct metal recovery rate.

[0068] The slag refiner provided in Examples 1-5 of the present invention is used to disperse the slag produced after the hot-dip galvanized aluminum-magnesium alloy smelting into powder. The slag is refined and dispersed, which can effectively reduce the entrainment of slag to particulate metal, avoid the waste of a large amount of valuable metal caused by salvaging surface slag when smelting products, improve the direct recovery rate of metal, and improve economic benefits.

[0069] Moreover, the slag refiners for hot-dip galvanized aluminum-magnesium alloy smelting provided by Examples 1-5 of the present invention produce no more than 10 kg of slag per ton of hot-dip galvanized magnesium-aluminum alloy produced. However, the slag refiners for hot-dip galvanized aluminum-magnesium alloy smelting provided by Comparative Example 1 produce up to 18 kg of slag per ton of hot-dip galvanized magnesium-aluminum alloy produced.

[0070] Comparative Example 2

[0071] The hot-dip galvanized aluminum-magnesium alloy smelting slag refiner DS2 of this comparative example is prepared by using the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner of the present invention according to the following composition: 30wt% of charcoal powder, 15wt% of ammonium chloride, 15wt% of cryolite, 15wt% of sodium chloride, 15wt% of zinc chloride, 5wt% of potassium chloride, 5wt% of magnesium chloride, and the indispensable impurities brought by the above components.

[0072] DS2 is used for slag treatment when the temperature of zinc-aluminum-magnesium alloy is 650℃. The amount of slag refiner DS2 added to hot-dip galvanized aluminum-magnesium alloy smelting is 0.18% of the mass of the zinc alloy liquid. A small amount of smoke is generated during the slag-making process. The slag-liquid separation is not complete. The slag produced by the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner provided by the embodiment of the present invention after hot-dip galvanized aluminum-magnesium alloy smelting is as follows: Figure 7 shown.

[0073] Although the slag refiner for hot-dip galvanized aluminum-magnesium alloy smelting provided in Comparative Example 2 is the same as that in Examples 1-5 of the present invention in terms of composition, the control of the mass percentage content of each component in Comparative Example 2 is different from that in Examples 1-5 of the present invention. Therefore, the slag produced by the slag refiners in Comparative Example 2 and Examples 1-5 of the present invention after hot-dip galvanized aluminum-magnesium alloy smelting is also different. Figure 1-5 and Figure 7 It can be seen from the comparison that after the hot-dip galvanized aluminum-magnesium alloy is smelted, the slag refiner of Comparative Example 2 is not completely separated from the slag and liquid, and its slag is easy to entrain more particulate metals, which will waste a lot of valuable metals and thus cause a low direct metal recovery rate.

[0074] The slag refiner provided in Examples 1-5 of the present invention is used to disperse the slag produced after the hot-dip galvanized aluminum-magnesium alloy smelting into powder. The slag is refined and dispersed, which can effectively reduce the entrainment of slag to particulate metal, avoid the waste of a large amount of valuable metal caused by salvaging surface slag when smelting products, improve the direct recovery rate of metal, and improve economic benefits.

[0075] Moreover, the slag refiners for hot-dip galvanized aluminum-magnesium alloy smelting provided by Examples 1-5 of the present invention produce no more than 10 kg of slag per ton of hot-dip galvanized magnesium-aluminum alloy produced. However, the slag refiners for hot-dip galvanized aluminum-magnesium alloy smelting provided by Comparative Example 1 produce up to 12 kg of slag per ton of hot-dip galvanized magnesium-aluminum alloy produced.

[0076] Therefore, by comparing Examples 1-5 of the present invention with Comparative Examples 1-2, it can be seen that the products of Examples 1-5 of the present invention have good slag refining and dispersion performance for hot-dip galvanized aluminum-magnesium alloy slag, and can fully separate the metal from the slag body. At the same time, the products of Examples 1-5 of the present invention produce less smoke when used, and can also reduce the entrainment of particulate metal in the zinc-aluminum-magnesium alloy slag.

[0077] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A hot-dip galvanized aluminum-magnesium alloy smelting slag refiner, characterized in that: Calculated by mass percentage, the invention comprises 25-30wt% of charcoal powder, 10-15wt% of ammonium chloride, 10-15wt% of cryolite, 10-15wt% of sodium chloride, 10-15wt% of zinc chloride, 5-10wt% of potassium chloride and 5-10wt% of magnesium chloride.

2. The hot-dip galvanized aluminum-magnesium alloy smelting slag refiner according to claim 1, characterized in that: Calculated by mass percentage, it includes 30wt% of charcoal powder, 15wt% of ammonium chloride, 15wt% of cryolite, 12wt% of sodium chloride, 13wt% of zinc chloride, 5wt% of potassium chloride and 10wt% of magnesium chloride.

3. The hot-dip galvanized aluminum-magnesium alloy smelting slag refiner according to claim 1, characterized in that: Calculated by mass percentage, it includes 28wt% of charcoal powder, 15wt% of ammonium chloride, 15wt% of cryolite, 10wt% of sodium chloride, 12wt% of zinc chloride, 10wt% of potassium chloride and 10wt% of magnesium chloride.

4. The hot-dip galvanized aluminum-magnesium alloy smelting slag refiner according to claim 1, characterized in that: Calculated by mass percentage, it includes 25wt% of charcoal powder, 15wt% of ammonium chloride, 13wt% of cryolite, 15wt% of sodium chloride, 13wt% of zinc chloride, 10wt% of potassium chloride and 9wt% of magnesium chloride.

5. The hot-dip galvanized aluminum-magnesium alloy smelting slag refiner according to claim 1, characterized in that: Calculated by mass percentage, it includes 30wt% of charcoal powder, 13wt% of ammonium chloride, 15wt% of cryolite, 13wt% of sodium chloride, 13wt% of zinc chloride, 8wt% of potassium chloride and 8wt% of magnesium chloride.

6. The hot-dip galvanized aluminum-magnesium alloy smelting slag refiner according to claim 1, characterized in that: Calculated by mass percentage, it includes 25wt% of charcoal powder, 15wt% of ammonium chloride, 15wt% of cryolite, 15wt% of sodium chloride, 10wt% of zinc chloride, 10wt% of potassium chloride and 10wt% of magnesium chloride.

7. A method for preparing the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner according to any one of claims 1 to 6, characterized in that: According to the components of the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner and their mass percentage contents, the components can be evenly mixed to obtain the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner.

8. A slag making method for the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner prepared according to claim 7, characterized in that: When hot-dip galvanized aluminum-magnesium alloy is produced by a cored induction furnace, the smelting temperature is controlled at 530° C.-590° C., and the amount of the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner is 0.1-0.2wt% of the mass of the smelted hot-dip galvanized aluminum-magnesium alloy.

9. The slag making method of hot-dip galvanized aluminum-magnesium alloy smelting slag refiner according to claim 8, characterized in that: When hot-dip galvanized aluminum-magnesium alloy is produced by a coreless induction furnace, the smelting temperature is controlled at 630° C.-720° C., and the amount of the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner is 0.1-0.2wt% of the mass of the smelted hot-dip galvanized aluminum-magnesium alloy.

10. The slag making method of hot-dip galvanized aluminum-magnesium alloy smelting slag refiner according to claim 8, characterized in that: When hot-dip galvanized aluminum-magnesium alloy is produced by a reverberatory furnace, the smelting temperature is controlled at 650° C.-800° C., and the amount of the hot-dip galvanized aluminum-magnesium alloy smelting slag refiner is 0.15-0.25wt% of the mass of the smelted hot-dip galvanized aluminum-magnesium alloy.

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