Self-settling type feeding device for improving yield of added elements and application of self-settling type feeding device

Abstract

The invention discloses a self-settling feeding device for improving the yield of added elements, which is characterized in that the self-settling feeding device comprises a hollow framework structure made of an alloy material, and a plurality of pores are formed in the hollow framework structure; the surface layer of the hollow framework structure is coated with a coating agent, the coating agent is an oily coating agent, and the aluminum foil layer is covered with the oily coating agent to obtain the self-settling feeding device. By using the device, the yield of high-activity modifiers (such as Sr, rare earth and the like) can be increased from 43% to 92% or above.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum alloy smelting, and in particular to a self-settling feeding device for improving the recovery rate of added elements and an application thereof. Background Art

[0002] In the aluminum alloy smelting process, it is a common process to add various alloying elements (such as titanium, boron, manganese, etc.) and modifiers (such as strontium, rare earth, etc.). However, the yield of these additives is low, especially after the addition of highly active modifiers, which are easy to volatilize or react incompletely with the aluminum liquid, resulting in material waste and increased costs.

[0003] Therefore, how to improve the yield after adding elements and modifiers has become an urgent problem to be solved in the field of aluminum alloy smelting.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, the object of the present invention is to provide a self-settling feeding device for improving the recovery rate of added elements.

[0006] In order to achieve the purpose of the present invention, the technical solution adopted is as follows:

[0007] A self-settling feeding device for improving the recovery rate of added elements, the self-settling feeding device comprises a hollow skeleton structure made of an alloy material, and a plurality of pores are arranged on the hollow skeleton structure;

[0008] The surface layer of the hollow skeleton structure is coated with a coating agent, and the coating agent is an oily coating agent. The self-settling feeding device is obtained by covering the aluminum foil layer with the oily coating agent.

[0009] In a preferred embodiment of the present invention, the alloy material is a high-density tungsten alloy or a high-density molybdenum alloy, and the density of the tungsten alloy or the molybdenum alloy is in the range of 10-20 g / cm 3 .

[0010] In a preferred embodiment of the present invention, the oily coating agent is a product obtained by diluting any one of sodium silicate and aluminum oxide or a mixture of the two with kerosene, wherein the weight proportion of the sodium silicate is 0-20% and the weight proportion of the aluminum oxide is 80-100%.

[0011] In a preferred embodiment of the present invention, the thickness of the aluminum foil layer is in the range of 0.1-2 mm.

[0012] An application of a self-settling feeding device for improving the recovery rate of added elements, wherein the device contains alloy elements or modifiers that react with aluminum liquid and then carries the alloy elements or modifiers that react with aluminum liquid to sink into the aluminum liquid.

[0013] The beneficial effects of the present invention are:

[0014] The self-settling feeding device of the present invention does not react with the aluminum liquid itself, but drives the alloy elements or modifiers that react with the aluminum liquid to sink into the aluminum liquid and fully react with the aluminum liquid after being wrapped by the aluminum liquid, thereby improving the recovery rate of the added elements. Specifically, the use of the device can increase the recovery rate of highly active modifiers (such as Sr, rare earth, etc.) from 43% to more than 92%. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The structure diagram of the self-settling feeding device of the present invention Figure 1 .

[0016] Figure 2 The structure diagram of the self-settling feeding device of the present invention Figure 2 .

[0017] Figure 3 The structure diagram of the self-settling feeding device of the present invention Figure 3 . DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be described clearly and completely below. If the specific conditions are not specified in the embodiments, they are carried out according to conventional conditions or conditions recommended by the manufacturer. If the manufacturer of the reagents or instruments used is not specified, they are all conventional products that can be purchased commercially. The process of the preparation method of the above-mentioned rare earth metal-doped composite modifier is described in detail below through specific examples:

[0019] Example 1

[0020] This embodiment provides a self-settling feeding device for improving the recovery rate of added elements, which is in the shape of a hollow porous cylindrical Figure 2 .

[0021] The material used for the self-settling feeding device in this embodiment is tungsten, with a density of 19.25 g / cm 3 , much higher than the density of aluminum alloy.

[0022] An oily coating agent is evenly coated thereon and baked dry, and then wrapped with aluminum foil having a thickness of 0.5 mm.

[0023] In the oily coating agent of this embodiment, sodium silicate accounts for 20% and aluminum oxide accounts for 80%.

[0024] The smelting and testing process is as follows:

[0025] S1: Put the aluminum material into the furnace and heat it to 720℃. After the aluminum material is completely melted, add 0.02% of the mass of the aluminum melt (composition: MgCl 2 : 48%, KCl: 39%, BaCl 2 : 8%, CaF 2 : 5%), and then the Sr-containing additive element master alloy that reacts with the aluminum liquid solution is added into the aluminum liquid melt by using the self-settling feeding device;

[0026] S2: The temperature was raised to 740°C, and after the raw materials were completely melted and kept warm for 20 minutes, samples were taken for testing of the composition; after calculation, the recovery rate of the Sr element was 92.4%, and the content of the Fe element did not increase.

[0027] Example 2

[0028] This embodiment provides a self-settling feeding device for improving the recovery rate of added elements, which is in the shape of a hollow porous cylindrical Figure 2 .

[0029] The material used for the self-settling feeding device in this embodiment is molybdenum, with a density of 10.20 g / cm 3 , much higher than the density of aluminum alloy.

[0030] An oily coating agent is evenly coated thereon and baked dry, and then wrapped with aluminum foil having a thickness of 0.3 mm.

[0031] In the oily coating agent of this embodiment, sodium silicate accounts for 15% and aluminum oxide accounts for 85%.

[0032] The smelting and testing process is as follows:

[0033] S1: Put the aluminum material into the furnace and heat it to 720℃. After the aluminum material is completely melted, add 0.02% of the mass of the aluminum melt (composition: MgCl 2 : 48%, KCl: 39%, BaCl 2 : 8%, CaF2: 5%), and then the mixed rare earth containing La and Ce that reacts with the aluminum liquid is added into the aluminum liquid melt by the self-settling feeding device;

[0034] S2: The temperature was raised to 740°C, and after the raw materials were completely melted and kept warm for 20 minutes, samples were taken for testing of the composition; after calculation, the recovery rate of the Sr element was 93.6%, and the content of the Fe element did not increase.

[0035] Example 3

[0036] This embodiment provides a self-settling feeding device for improving the recovery rate of added elements, which is in the shape of a hollow porous prism. Figure 1 .

[0037] The material used for the self-settling feeding device in this embodiment is tungsten, with a density of 19.25 g / cm 3 , much higher than the density of aluminum alloy.

[0038] An oily coating agent is evenly coated thereon and baked dry, and then wrapped with aluminum foil having a thickness of 0.1 mm.

[0039] In the oily coating agent of this embodiment, sodium silicate accounts for 10% and aluminum oxide accounts for 90%.

[0040] The smelting and testing process is as follows:

[0041] S1: Put the aluminum material into the furnace and heat it to 720℃. After the aluminum material is completely melted, add 0.02% of the mass of the aluminum melt (composition: MgCl 2 : 48%, KCl: 39%, BaCl 2 : 8%, CaF 2 : 5%), and then the mixed rare earth containing La and Ce that reacts with the aluminum liquid is added into the aluminum liquid by using the self-settling feeding device;

[0042] S2: The temperature was raised to 740°C, and after the raw materials were completely melted and kept warm for 20 minutes, samples were taken for testing of the composition; after calculation, the recovery rate of the Sr element was 92.1%, and the content of the Fe element did not increase.

[0043] Example 4

[0044] This embodiment provides a self-settling feeding device for improving the recovery rate of added elements, which is in the shape of a hollow porous prism. Figure 1 .

[0045] The material used for the self-settling feeding device in this embodiment is molybdenum, with a density of 10.20 g / cm 3 , much higher than the density of aluminum alloy.

[0046] An oily coating agent is evenly coated thereon and baked dry, and then wrapped with aluminum foil having a thickness of 1.0 mm.

[0047] In the oily coating agent of this embodiment, sodium silicate accounts for 5% and aluminum oxide accounts for 95%.

[0048] The smelting and testing process is as follows:

[0049] S1: Put the aluminum material into the furnace and heat it to 720℃. After the aluminum material is completely melted, add 0.02% of the mass of the aluminum melt (composition: MgCl2 : 48%, KCl: 39%, BaCl 2 : 8%, CaF 2 : 5%), and then the Sr-containing additive element master alloy that reacts with the aluminum liquid solution is added into the aluminum liquid melt by using the self-settling feeding device;

[0050] S2: The temperature was raised to 740°C, and after the raw materials were completely melted and kept warm for 20 minutes, samples were taken for testing of the composition; after calculation, the recovery rate of the Sr element was 92.5%, and the content of the Fe element did not increase.

[0051] Example 5

[0052] This embodiment provides a self-settling feeding device for improving the recovery rate of added elements, which is in the shape of a hollow hemispherical Figure 3 .

[0053] The material used for the self-settling feeding device in this embodiment is tungsten, with a density of 19.25 g / cm 3 , much higher than the density of aluminum alloy.

[0054] An oily coating agent is evenly coated thereon and baked dry, and then wrapped with aluminum foil having a thickness of 0.2 mm.

[0055] In the oily coating agent of this embodiment, sodium silicate accounts for 3% and aluminum oxide accounts for 97%.

[0056] The smelting and testing process is as follows:

[0057] S1: Put the aluminum material into the furnace and heat it to 720℃. After the aluminum material is completely melted, add 0.02% of the mass of the aluminum melt (composition: MgCl 2 : 48%, KCl: 39%, BaCl 2 : 8%, CaF 2 : 5%), and then the mixed rare earth containing La and Ce that reacts with the aluminum liquid is added into the aluminum melt by using the self-settling feeding device;

[0058] S2: The temperature was raised to 740°C, and after the raw materials were completely melted and kept warm for 20 minutes, samples were taken for testing of the composition; after calculation, the recovery rate of the Sr element was 93.4%, and the content of the Fe element did not increase.

[0059] Example 6

[0060] This embodiment provides a self-settling feeding device for improving the recovery rate of added elements, which is in the shape of a hollow hemispherical Figure 3 .

[0061] The material used for the self-settling feeding device in this embodiment is molybdenum, with a density of 10.20 g / cm3 , much higher than the density of aluminum alloy.

[0062] An oily coating agent is evenly coated thereon and baked dry, and then wrapped with aluminum foil having a thickness of 0.5 mm.

[0063] In the oily coating agent of this embodiment, sodium silicate accounts for 2% and aluminum oxide accounts for 98%.

[0064] The smelting and testing process is as follows:

[0065] S1: Put the aluminum material into the furnace and heat it to 720℃. After the aluminum material is completely melted, add 0.02% of the mass of the aluminum melt (composition: MgCl 2 : 48%, KCl: 39%, BaCl 2 : 8%, CaF 2 : 5%), and then the mixed rare earth containing La and Ce that reacts with the aluminum liquid is added into the aluminum melt by using the self-settling feeding device;

[0066] S2: The temperature was raised to 740°C, and after the raw materials were completely melted and kept warm for 20 minutes, samples were taken for testing of the composition; after calculation, the recovery rate of the Sr element was 92.9%, and the content of the Fe element did not increase.

[0067] Comparative Example 1 - Use of Covering Agent

[0068] This comparative example provides a traditional feeding method, which is carried out by the following steps:

[0069] S1: Put the aluminum material into the furnace and heat it to 720℃. After the aluminum material is completely melted, add 0.02% of the melt mass of the covering agent (component is MgCl 2 : 48%, KCl: 39%, BaCl 2 : 8%, CaF 2 : 5%), and then the Sr-containing material is pressed into the melt using an iron bell;

[0070] S2: The temperature was raised to 740°C, and after the raw materials were completely melted and kept warm for 20 minutes, samples were taken for testing of the composition; after calculation, the recovery rate of the Sr element was 43.0%, and the content of the Fe element increased by 0.1%.

[0071] Comparative Example 2 - No covering agent used

[0072] This comparative example provides a traditional feeding method, which is carried out by the following steps:

[0073] S1: Put aluminum material into the furnace and heat it to 720℃; after the aluminum material is completely melted, use an iron bell to press the Sr-containing material into the melt;

[0074] S2: The temperature was raised to 740°C, and after the raw materials were completely melted and kept at this temperature for 20 minutes, samples were taken for testing of the composition; after calculation, the recovery rate of the Sr element was 39.0%, and the content of the Fe element increased by 0.1%.

[0075]

[0076]

[0077] As shown in Table 1, when the device of the present invention is used, a high-density alloy material containing added elements or modifiers is placed in an aluminum alloy melt. Since the density of the device of the present invention is much greater than the density of the aluminum alloy, the device can carry the modifier to sink to the bottom of the melt.

[0078] During the sedimentation process, the alloying elements or modifiers in the container gradually melt and float upward, fully reacting with the aluminum liquid to increase the recovery rate of the added elements.

[0079] Superimposing the coating agent on the device enables the device of the present invention to ensure that it hardly reacts with the aluminum melt, so that it can be reused many times, thereby significantly increasing the practical performance of the present invention.

[0080] In summary, the present invention provides a self-settling feeding device, which significantly improves the recovery rate of high-activity modifier in aluminum alloy melt through the combined use of high-density refractory alloy container and surface coating agent, reduces material waste, reduces production costs, and has important application value and promotion prospects.

[0081] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A self-settling feeding device for improving the recovery rate of added elements, characterized in that: The self-settling feeding device comprises a hollow skeleton structure made of an alloy material, and a plurality of pores are arranged on the hollow skeleton structure; The surface layer of the hollow skeleton structure is coated with a coating agent, and the coating agent is an oily coating agent. The self-settling feeding device is obtained by covering the aluminum foil layer with the oily coating agent.

2. A self-settling feeding device for improving the recovery rate of added elements as claimed in claim 1, characterized in that: The alloy material is a high-density tungsten alloy or a high-density molybdenum alloy, and the density of the tungsten alloy or the molybdenum alloy is in the range of 10-20 g / cm 3 .

3. A self-settling feeding device for improving the recovery rate of added elements as claimed in claim 1, characterized in that: The oily coating agent is a product obtained by diluting any one of sodium silicate and aluminum oxide or a mixture of the two with kerosene, wherein the weight proportion of the sodium silicate is 0-20% and the weight proportion of the aluminum oxide is 80-100%.

4. A self-settling feeding device for improving the recovery rate of added elements as claimed in claim 1, characterized in that: The thickness of the aluminum foil layer is in the range of 0.1-2 mm.

5. An application of a self-settling feeding device for improving the recovery rate of added elements, characterized in that: The application is to use the self-sinking feeding device as described in any one of claims 1 to 4 to contain the alloy element or modifier that reacts with the aluminum liquid and then carry the alloy element or modifier that reacts with the aluminum liquid to sink into the aluminum liquid melt.

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