Method and device for preparing powder for selective laser melting by recovering waste aluminum and product

A laser selective melting and aluminum recycling technology, applied in the direction of process efficiency improvement, additive processing, etc., can solve problems such as environmental pollution and resource waste, and achieve the effect of low oxygen content, fewer links and fine grains

Active Publication Date: 2019-04-05
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the production and processing of aluminum products, a large amount of process waste and substandard products will be produced, collectively referred to as "scrap aluminum". If the waste aluminum cannot be properly disposed of, it will cause environmental pollution and a huge waste of resources.

Method used

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  • Method and device for preparing powder for selective laser melting by recovering waste aluminum and product
  • Method and device for preparing powder for selective laser melting by recovering waste aluminum and product
  • Method and device for preparing powder for selective laser melting by recovering waste aluminum and product

Examples

Experimental program
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Effect test

Embodiment 1

[0047] A method for recycling waste aluminum to prepare powder for laser selective melting, the steps are as follows:

[0048] 1) Crush the waste aluminum into aluminum chips with a particle size of 1-5cm, and then perform electromagnetic iron removal on the aluminum chips, then soak the aluminum chips in acetone to remove oil, and wash them with water after degreasing;

[0049] The washed aluminum chips are immersed in the molten paint stripping powder at 800°C for 1 min, and the paint stripping powder is composed of sodium carbonate and magnesium chloride with a mass ratio of 1:1;

[0050] The depainted aluminum chips are immersed in a cleaning solution for ultrasonic cleaning to remove the oxide film on the surface of the aluminum chips, and the cleaning solution is composed of absolute ethanol and ethyl bromide with a volume ratio of 1:9;

[0051] The aluminum chips after removing the oxide film are dried with a direct heating drum dryer, the drying rotation speed is 1r / mi...

Embodiment 2

[0060] A method for recycling waste aluminum to prepare powder for laser selective melting, the steps are as follows:

[0061] 1) Crush the waste aluminum into aluminum chips with a particle size of 1-5cm, and then perform electromagnetic iron removal on the aluminum chips, then soak the aluminum chips in acetone to remove oil, and wash them with water after degreasing;

[0062] The washed aluminum chips are immersed in the molten paint stripping powder at 850°C for 5 minutes, and the paint stripping powder is composed of sodium carbonate and magnesium chloride with a mass ratio of 1:1;

[0063] The depainted aluminum chips are immersed in a cleaning solution for ultrasonic cleaning to remove the oxide film on the surface of the aluminum chips, and the cleaning solution is composed of absolute ethanol and ethyl bromide with a volume ratio of 1:9;

[0064] The aluminum shavings after removing the oxide film are dried with a direct heating drum dryer, the drying rotation speed i...

Embodiment 3

[0073] A method for recycling waste aluminum to prepare powder for laser selective melting, the steps are as follows:

[0074] 1) Crush the waste aluminum into aluminum chips with a particle size of 1-5cm, and then perform electromagnetic iron removal on the aluminum chips, then soak the aluminum chips in acetone to remove oil, and wash them with water after degreasing;

[0075] The washed aluminum chips are immersed in the molten paint stripping powder at 850°C for 1-5 minutes, and the paint stripping powder is composed of sodium carbonate and magnesium chloride with a mass ratio of 1:1;

[0076] The depainted aluminum chips are immersed in a cleaning solution for ultrasonic cleaning to remove the oxide film on the surface of the aluminum chips, and the cleaning solution is composed of absolute ethanol and ethyl bromide with a volume ratio of 1:9;

[0077]The aluminum shavings after removing the oxide film are dried with a direct heating drum dryer, the drying rotation speed ...

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Abstract

The invention belongs to the technical field of waste aluminum reusing, and particularly relates to a method and device for preparing powder for selective laser melting by recovering waste aluminum and a product. According to the method, the device and the product, waste aluminum recovering remelting technology and gas atomization powdering technology can be combined into a whole, the waste aluminum is directly prepared into the powder for laser selective melting, moreover, salt mixture components are added in the melting process so that the final powder can be uniform in microstructure, the crystal grains can be refined, and the product quality can be improved.

Description

technical field [0001] The invention belongs to the technical field of waste aluminum utilization, and in particular relates to a method, product and equipment for recycling waste aluminum to prepare powder for selective laser melting. Background technique [0002] During the production and processing of aluminum products, a large amount of process waste and substandard products will be produced, collectively referred to as "scrap aluminum". If the waste aluminum cannot be properly disposed of, it will cause environmental pollution and a huge waste of resources. Due to the relatively clear chemical composition of waste aluminum, low recycling cost, and high reuse value, technologies related to waste aluminum recycling have received more and more attention. [0003] Gas atomization pulverization technology has the advantages of less environmental pollution, high powder sphericity, low oxygen content and high cooling rate. After years of development, gas atomization pulveriza...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B9/10C22B21/06B22F9/08B33Y70/00
CPCB22F9/082B22F2009/0848B33Y70/00C22B7/001C22B9/10C22B21/062Y02P10/20
Inventor 白培康赵文杰赵占勇李忠华刘斌王建宏李玉新王宇李晓峰
Owner ZHONGBEI UNIV
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