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Recycled aluminium alloy non-gaseous impurity removing method

A technology of aluminum alloy melt and aluminum alloy, which is applied in the field of recycled metals, can solve the problems of difficult impurity removal in the smelting process and the complex composition of waste aluminum, and achieve the effect of significant impurity removal and effective control

Inactive Publication Date: 2019-06-14
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of complex components of waste aluminum and difficulty in removing impurities in the smelting process, the present invention provides a method for removing non-gas impurities in recycled aluminum alloys, so as to realize the removal of non-gas impurities in aluminum alloys and effectively control the chemical composition of aluminum alloys

Method used

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  • Recycled aluminium alloy non-gaseous impurity removing method
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  • Recycled aluminium alloy non-gaseous impurity removing method

Examples

Experimental program
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Effect test

Embodiment 1

[0045] A method for removing non-gas impurities from recycled 1040 aluminum alloys with waste aluminum alloys as the main raw material, the steps are as follows:

[0046] (1) Magnetic separation removes 100% ferromagnetic impurities; eddy current separation removes 100% non-adhesive rubber, resin and plastic; sieving removes 95% of sand and dust;

[0047] (2) heating the waste miscellaneous aluminum alloy after pretreatment to 100 ℃ and drying for 30 minutes, removing 98% of the moisture, oil stain and coating on the surface of the waste miscellaneous aluminum alloy;

[0048] (3) The waste miscellaneous aluminum alloys after dehydration and depainting are melted at 680° C., stirred, and left still;

[0049] (4) After using a 30ppi ceramic filter plate to filter and remove non-aluminum solid impurities, the online composition detection, compared with Table 1, needs to further remove the Cu element in the melt;

[0050] (5) Use a mixed gas of nitrogen and chlorine with a volume r...

Embodiment 2

[0053] A method for removing non-gas impurities from recycled 1060 aluminum alloys with waste aluminum alloys as the main raw material, the steps are as follows:

[0054] (1) Magnetic separation removes 100% ferromagnetic impurities; eddy current separation removes 100% non-adhesive rubber, resin and plastic; sieving removes 95% of sand and dust;

[0055] (2) The pretreated waste aluminum alloy was heated to 150° C. and dried for 25 minutes to remove 98% of the moisture, oil and coating on the surface of the waste aluminum alloy;

[0056] (3) The waste miscellaneous aluminum alloys after dehydration and depainting are melted at 680° C., stirred, and left still;

[0057] (4) After using a 30ppi ceramic filter plate to filter and remove non-aluminum solid impurities, the online composition test, compared with Table 1, meets the requirements of GBT3190-2008 "Chemical Composition of Deformed Aluminum and Aluminum Alloys";

[0058] (5) Obtain recycled 1060 aluminum alloy ingots by...

Embodiment 3

[0060] A method for removing non-gas impurities from recycled 1070 aluminum alloys using waste aluminum alloys as the main raw material, the steps are as follows:

[0061] (1) Magnetic separation removes 100% ferromagnetic impurities; eddy current separation removes 100% non-adhesive rubber, resin and plastic; sieving removes 95% of sand and dust;

[0062] (2) The pretreated waste aluminum alloy was heated to 150° C. and dried for 25 minutes to remove 98% of the moisture, oil and coating on the surface of the waste aluminum alloy;

[0063] (3) The waste miscellaneous aluminum alloys after dehydration and depainting are melted at 680° C., stirred, and left still;

[0064] (4) After using a 30ppi ceramic filter plate to filter and remove non-aluminum solid impurities, the online composition test, compared with Table 1, meets the requirements of GBT3190-2008 "Chemical Composition of Deformed Aluminum and Aluminum Alloys";

[0065] (5) Obtain recycled 1070 aluminum alloy ingots b...

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Abstract

The invention belongs to the technical field of recycled metal, and particularly relates to a recycled aluminium alloy non-gaseous impurity removing method. The method comprises the steps of pretreatment impurity removal and smelting impurity removal; scrap aluminum pretreatment comprises physical sorting, and drying, the physical sorting is adopted for removing non-aluminum impurities, and organic matter impurities are removed through drying; according to smelting impurity removal, the impurities are removed in the smelting process through using of the differences of the impurity element andthe aluminum element in the aspect of density, the melting point and the chemical property; the recycled aluminum alloy is subjected to melting, stirring and standing, and the high-melting-point high-density non-aluminum impurities are subjected to primary filter impurity removal; the recycled aluminum alloy melt subjected to primary filter impurity removal is subjected to component benchmarking,if the melt is not qualified, an impurity removal agent is added for slagging impurity removal, and through secondary filtering, exceeding non-gas element impurities are removed until the target aluminum alloy required by GBT3190-2008 deforming aluminum and aluminum alloy chemical components is achieved. Recycled aluminium alloy non-gaseous impurity removing is achieved, the process is simple, andthe industrial application is easily achieved.

Description

technical field [0001] The invention belongs to the technical field of recycled metals, and in particular relates to a method for removing non-gas impurities of recycled aluminum alloys. Background technique [0002] Recycled aluminum is made of aluminum and aluminum alloy product manufacturing scrap, defective products, and scrap aluminum that has completed its service life as the main raw material, and is produced through smelting and preparation to meet the standard aluminum alloy ingots. The energy consumption and pollutant discharge of recycled aluminum alloy are only 3% to 5% of that of primary aluminum alloy, which has a good effect of energy saving and emission reduction. [0003] The excellent properties of scrap aluminum can be reproduced through the steps of screening, remelting, adjusting chemical composition, refining and purification. Removing impurities from waste aluminum is one of the difficulties in recycling aluminum alloys. Scrap aluminum comes from a w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B21/00C22B21/06
Inventor 张深根姜玉刘波
Owner UNIV OF SCI & TECH BEIJING
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