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A preparation of tial 3 Alloy and purify the method that contains Fe waste aluminum alloy

A technology for scrap aluminum alloy and aluminum alloy, which is applied in the direction of improving process efficiency to achieve the effects of sufficient heat and mass transfer, environmentally friendly recycling, and enhanced impurity removal effect.

Active Publication Date: 2022-06-17
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention is aimed at Fe impurity removal and TiAl in waste aluminum alloy in the prior art 3 preparation problem, providing a method for preparing TiAl 3 Alloying and purifying Fe-containing waste aluminum alloy method, the present invention adopts electromagnetic induction directional solidification furnace under vacuum or inert atmosphere conditions to separate and purify titanium-aluminum alloy melt, select TiAl 3 The liquidus composition of the alloy precipitation to ensure the precipitation of a single, high-purity TiAl 3 Alloys, avoid inclusion of Al phase, Ti phase and other Ti-Al intermediate phases; the present invention is based on the order of crystallization temperature, TiAl 3 After the alloy precipitation is completed, Fe and Mn impurity phases will be precipitated, and then aluminum will be precipitated. The Mg and Zn impurities in the alloy will be volatilized and eliminated during the heat preservation process due to their volatility; while the Fe, Mn and Cu in the alloy During the directional solidification process, impurities such as Fe and Mn are continuously transferred to the liquid phase due to the segregation effect at the solid / liquid interface, and Fe and Mn impurities are finally enriched in the TiAl 3 Between the low-Fe aluminum alloy and the top of the final solidified alloy, Cu and other impurities are mainly enriched at the top of the final solidified alloy; the impurity-rich phase will be cut and removed to realize the purification of waste aluminum alloy

Method used

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  • A preparation of tial <sub>3</sub> Alloy and purify the method that contains Fe waste aluminum alloy
  • A preparation of tial <sub>3</sub> Alloy and purify the method that contains Fe waste aluminum alloy

Examples

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Effect test

Embodiment 1

[0021] Example 1: A kind of preparation of TiAl 3 And the method for purifying Fe-containing scrap aluminum alloy (see figure 1 ), the specific steps include:

[0022] (1) The Fe-containing scrap aluminum alloy with a purity of 92.97% (main impurities and their contents are: 1.01% Fe, 2.41% Si, 0.89% Mg, 1.25% Zn, 0.52% Mn and 0.95% Cu) and a purity of 99.6% % sponge titanium (the main impurities and their contents are: 0.08% Fe, 0.02% Si and 0.01% Mg) are mixed uniformly to obtain a mixture, and then placed in a directional solidification furnace of electromagnetic induction heating under the condition of vacuum degree of 6Pa (frequency 30KHZ) ), electromagnetic induction heating the mixture to melting (1400) ℃ and smelting for 1h to fully volatilize the volatile impurities Mg and Zn to obtain a titanium-aluminum alloy melt with uniform composition; the mass ratio of Fe-containing scrap aluminum alloy to sponge titanium is 4 : 1; the removal rates of Mg and Zn were 51.9% an...

Embodiment 2

[0026] Example 2: A kind of preparation of TiAl 3 And the method for purifying Fe-containing scrap aluminum alloy (see figure 1 ), the specific steps include:

[0027] (1) The Fe-containing scrap aluminum alloy with a purity of 92.97% (main impurities and their contents are: 1.01% Fe, 2.41% Si, 0.89% Mg, 1.25% Zn, 0.52% Mn and 0.95% Cu) and a purity of 96.5% % of waste titanium-aluminum alloy (containing 93% Ti and 3.5% Al, the main impurities and their contents are: 1.8% Mn and 0.6% Fe) were mixed uniformly to obtain a mixture, and then placed in an electromagnetic induction heating furnace under the condition of vacuum degree of 1Pa. In a directional solidification furnace (frequency 45KHZ), electromagnetic induction heating the mixture to melting (1450) ℃ and smelting for 1.5h to fully volatilize the volatile impurities Mg and Zn to obtain a titanium-aluminum alloy melt with uniform composition; which contains Fe scrap aluminum alloy The mass ratio to sponge titanium is 7...

Embodiment 3

[0031] Embodiment 3: a kind of preparation TiAl 3 And the method for purifying Fe-containing scrap aluminum alloy (see figure 1 ), the specific steps include:

[0032] (1) The Fe-containing scrap aluminum alloy with a purity of 90.16% (main impurities and their contents are: 1.75% Fe, 3.18% Si, 0.58% Mg, 1.27% Zn, 1.56% Mn and 1.50% Cu) and a purity of 99.5% % sponge titanium (main impurities and their contents: 0.12% Fe, 0.03% Si, 0.04% Mg) are mixed uniformly to obtain a mixture, and then placed in an electromagnetic induction heating directional solidification furnace under an inert atmosphere (argon) ( Frequency 60KHZ), electromagnetic induction heating the mixture to melting (1350) ℃ and smelting for 1h to fully volatilize the volatile impurities Mg and Zn to obtain a titanium-aluminum alloy melt with uniform composition; the mass ratio of Fe-containing scrap aluminum alloy to sponge titanium is 5:1; the removal rates of Mg and Zn are 49.8% and 92.1%;

[0033] (2) Unde...

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Abstract

The invention relates to a method for preparing TiAl 3 The invention discloses a method for alloying and purifying waste aluminum alloys containing Fe, and belongs to the technical field of resource utilization of waste aluminum alloys. In the present invention, Fe-containing waste aluminum alloys and titanium-based materials are evenly mixed, then heated and melted under vacuum or inert atmosphere conditions, and smelted for 1-2 hours to fully volatilize volatile impurities to obtain a titanium-aluminum alloy melt with uniform composition; Under the condition of vacuum or inert atmosphere, the titanium-aluminum alloy melt is separated and purified by directional solidification under induction heating to obtain a titanium-aluminum alloy ingot, wherein the titanium-aluminum alloy ingot sequentially includes TiAl 3 Alloy, Fe-Mn impurity-rich phase, low-Fe aluminum alloy and impurity-rich phase; TiAl alloy ingot along TiAl 3 Alloy, Fe-Mn impurity-rich phase, low-Fe aluminum alloy and impurity-rich phase boundary cutting to obtain TiAl 3 alloys and low-Fe aluminum alloys. The invention can realize simultaneous preparation of TiAl 3 Alloying and refining Fe-containing scrap aluminum alloys.

Description

technical field [0001] The present invention relates to a kind of preparation of TiAl 3 The invention discloses a method for alloying and purifying waste aluminum alloy containing Fe, belonging to the technical field of resource utilization of waste aluminum alloy. Background technique [0002] Aluminum alloy not only has a series of excellent properties such as low density, high strength and corrosion resistance, but also has a very high recyclability. It is the most valuable metal for recycling and recycling, so aluminum alloy has become the second largest in the world. Large metal material. In recent years, with the severe shortage of primary aluminum production and the successive reaching of the scrapped period of various aluminum products, the recycling of various types of scrap aluminum alloys has attracted more and more attention. The recycling of scrap aluminum alloys has many key environmental and economic benefits, such as: scrap aluminum alloy recycling requires...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22C21/00C22C1/02
CPCC22B7/004C22C21/003C22C1/026Y02P10/20
Inventor 雷云张亚坤马文会张陈康健李鹏
Owner KUNMING UNIV OF SCI & TECH
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