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Method for recycling aluminum scrap

A technology of aluminum scrap and aluminum powder, applied in the direction of improving process efficiency, can solve the problems of high cost, weak adaptability of scrap aluminum, poor quality of recycled aluminum, etc., to enhance adaptability, improve casting stickiness, and improve extension Effects of Sex and Mobility

Active Publication Date: 2017-02-01
湖北万佳宏铝业股份有限公司
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the advanced technology introduced and the self-developed DDF technology have high requirements for pre-treatment, the adaptability to waste aluminum is weak, and the investment is huge, the process is complicated, and the cost is high, so it is difficult to adapt to the small-scale and waste-aluminum recycling industry in my country. The reality of complex sources is the main reason why most waste aluminum recycling enterprises still use the original smelting method, which is easy to pollute the environment, and the recovery rate of waste aluminum is low, the quality of recycled aluminum is poor, and the energy consumption of smelting is high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0045] 1) Sorting: Take 500kg of recycled aluminum scraps and manually remove non-aluminum impurities;

[0046] 2) Crushing: Break the sorted aluminum and aluminum scraps into powder;

[0047] 3) Iron removal: Feed the waste powder into the conveyor belt, pass through the electromagnetic channel, and absorb the iron powder in it by magnetic force to obtain pure aluminum powder;

[0048] 4) Drying: Send the aluminum powder into a 300°C furnace for 10 minutes to remove moisture and grease;

[0049] 5) Melting: Send the dried aluminum powder into the melting furnace to melt;

[0050] 6) Impurity removal: Use mechanical stirring to stir the molten aluminum evenly to remove unmelted impurities and scum on the surface; then add 1.35kg of NaCl and 1.65kg of KCl eutectic mixture as a solvent to remove chemical impurities in the molten aluminum;

[0051] 7) Adding alloying elements: After the solvent is completely melted, when the temperature of the molten aluminum reaches 700°C, add...

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PUM

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Abstract

The invention discloses a method for recycling aluminum scrap. According to the method, recovered aluminum scrap is subjected to treatment including physical screening, high-temperature drying, melting, chemical removal of impurities, alloy element addition, solution, aging and extrusion, and aluminum alloy bars are obtained. The method comprises the steps of sorting, grinding, iron removal, drying, melting, impurity removal, alloy element addition, solution, aging and extrusion treatment. The method adopts a simple process, is lower in cost and can substantially improve the quality of recovered aluminum materials.

Description

technical field [0001] The invention belongs to the technical field of material regeneration, and in particular relates to a method for recycling aluminum waste. Background technique [0002] Aluminum is a silver-white metal with a low density of only 2.79 / cm 3 , about the density of steel, copper or brass (respectively 7.839 / cm 3 , 8.939 / cm 3 ) of 1 / 3. Good electrical conductivity and thermal conductivity, high plasticity, good corrosion resistance, etc. The surface of aluminum is highly reflective, and radiant energy, visible light, radiant heat and electric waves can be effectively reflected by aluminum, while anodized and dark-colored anodes The oxidized surface can be reflective or absorptive, and polished aluminum has excellent reflectivity in a wide wavelength range, so it has various decorative and reflective uses. The chemical properties of aluminum are active, and it is easy to combine with oxygen in the air. A dense and firm aluminum oxide film is formed on th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C21/00C22F1/04C22B21/00C22B7/00
CPCC22B7/003C22B21/0007C22B21/0092C22C1/026C22C21/00C22F1/04Y02P10/20
Inventor 张友孝
Owner 湖北万佳宏铝业股份有限公司
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