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A method for preparing copper-containing aluminum alloy from aviation industry aluminum alloy waste regeneration

An aviation industry, copper-aluminum alloy technology, applied in circular economy technology and environmental protection fields, to achieve high use value, save recycling costs, and avoid harm

Active Publication Date: 2022-07-29
INST OF PROCESS ENG CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] It can be seen that the existing recycling technology focuses on the removal of certain types of alloy elements from aviation aluminum alloy waste, and has not yet involved in the regeneration of aluminum alloy products.

Method used

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  • A method for preparing copper-containing aluminum alloy from aviation industry aluminum alloy waste regeneration
  • A method for preparing copper-containing aluminum alloy from aviation industry aluminum alloy waste regeneration
  • A method for preparing copper-containing aluminum alloy from aviation industry aluminum alloy waste regeneration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Take an appropriate amount of aviation aluminum alloy waste after paint stripping treatment for simple melting. After ICP-OES detection, the main alloy components of the original aluminum alloy are shown in Table 2.

[0040] According to the composition requirements of the target alloy 2024 aluminum alloy, pure copper with a mass fraction of 0.8% was weighed and added to the mixed alloy.

[0041] Put the material into a high-purity graphite crucible, vacuumize the induction furnace until the internal pressure is lower than 30Pa, and heat and melt in an induction furnace with a built-in graphite condensing plate at a temperature of 780°C. Control the frequency of the induction furnace to realize the stirring of the melt. During this process, zinc and magnesium are separated from the aluminum alloy melt in the form of steam, volatilized to the condensation pan placed on the upper part of the melt and condensed.

[0042] After 60 minutes, the aluminum alloy solution was fil...

Embodiment 2

[0047] Take an appropriate amount of aviation aluminum alloy waste after paint stripping treatment for simple melting. After ICP-OES detection, the main alloy components of the original aluminum alloy are shown in Table 3.

[0048] According to the composition requirements of the target alloy 2014 aluminum alloy, a copper-magnesium alloy with a mass fraction of 2.5% was weighed and added to the mixed alloy.

[0049] Put the material into a high-purity graphite crucible, vacuumize the induction furnace until the internal pressure is lower than 25Pa, and heat and melt in an induction furnace with a built-in graphite condensing plate at a temperature of 900°C. Control the frequency of the induction furnace to realize the stirring of the melt. During this process, zinc and magnesium are separated from the aluminum alloy melt in the form of steam, volatilized to the condensation pan placed on the upper part of the melt and condensed.

[0050] After 120 minutes, the aluminum alloy ...

Embodiment 3

[0055] Take an appropriate amount of aviation aluminum alloy waste after paint stripping treatment for simple melting. After ICP-OES detection, the main alloy components of the original aluminum alloy are shown in Table 4.

[0056] According to the composition requirements of the target alloy 2219 aluminum alloy, a copper-chromium alloy with a mass fraction of 3.0% was weighed and added to the mixed alloy.

[0057] Put the material into a high-purity graphite crucible, vacuumize the induction furnace until the internal pressure is lower than 10Pa, and heat and melt in an induction furnace with a built-in graphite condensing plate at a temperature of 1030°C. Control the frequency of the induction furnace to realize the stirring of the melt. During this process, zinc and magnesium are separated from the aluminum alloy melt in the form of steam, volatilized to the condensation pan placed on the upper part of the melt and condensed.

[0058] After 180 minutes, the aluminum alloy ...

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Abstract

The invention discloses a method for preparing copper-containing aluminum alloy by regenerating aluminum alloy waste from aviation industry. The invention belongs to the fields of circular economy technology and environmental protection. Its main technical scheme is to use the aviation industry aluminum alloy mixed waste after stripping, according to the target alloy composition requirements, add an appropriate amount of metal or alloy for composition control, smelting in a vacuum furnace, and achieve aluminum alloy impurity removal by controlling the smelting conditions process. Removal and alloying are carried out simultaneously, and the target copper-containing aluminum alloy is prepared by casting after filtering and removing impurities. The invention makes full use of the alloy components in the aluminum alloy waste of the aviation industry, and can realize the regeneration of different types of aluminum-copper alloys without additional degassing through on-line / off-line alloy component control and short-range smelting. The recovery cost is low, the industrial production is easy, and the Significant economic, environmental and social benefits.

Description

technical field [0001] The invention relates to a method for preparing copper-containing aluminum alloy for aviation by regenerating aluminum alloy waste from aviation industry, and belongs to the field of circular economy technology and environmental protection. Background technique [0002] In the past few decades, the production of primary aluminum worldwide has increased rapidly. According to data, the world's primary aluminum production was less than 20 million tons in 1997, and it has grown to 57 million tons in 2016. The 2-series and 7-series aluminum alloys are widely used in aircraft structural materials due to their good mechanical properties, mature processing technology and reliable testing methods, which have brought revolutionary changes to the structure and performance of aircraft. [0003] Table 1. 2 series and 7 series aluminum alloy composition (weight percentage) [0004] [0005] The compositions of 2 series and 7 series aluminum alloys are shown in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C21/18C22C21/16C22C21/14C22B9/02
CPCC22C1/026C22C21/18C22C21/16C22C21/14C22B9/023C22B21/0007C22B21/066C22B21/068C22B21/0092Y02P10/20
Inventor 孙峙刘春伟韦漩曹宏斌严鹏程
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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