Method for removing magnesium impurity element in waste aluminum regeneration

A technology for regenerating impurity elements and aluminum, which is applied in the direction of improving process efficiency, can solve the problems that magnesium impurity elements do not have, and has not been seen to remove magnesium impurity elements, and achieves the effect of less demanding process requirements and short process steps.

Active Publication Date: 2014-12-10
HUAWEI TEHCHNOLOGIES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Technical information about removing impurity elements in aluminum alloys can be found in published Chinese patent documents, typically such as the "Method for Removing Impurity Element Silicon in Aluminum Alloys" recommended by Publication No. CN101086042A, and "Removal of Aluminum Alloys Method for removing impurity iron in aluminum alloy" and "Method for removing silicon element in aluminum alloy" introduced by the announcement number CN101619403B, etc., but there is no technical information about removing magnesium impurity element, and it is not limited to these patent documents cited for removing Magnesium impurity elements in waste aluminum melt have no reference significance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A) To prepare magnesium removal flux, put 30% of manganese chloride, 10% of calcium chloride, 30% of aluminum fluoride, 5% of activated carbon, 5% of calcium oxide and 20% of magnesium carbonate weighed by mass into a stirring Such as in a stirred tank, stir 15min with a stirrer at a speed of 60rpm to obtain a magnesium-removing flux for use;

[0025] B) Waste aluminum smelting, first put the waste aluminum into the smelting furnace and melt it into waste aluminum melt, then add the magnesium removal flux obtained in step A) into the waste aluminum melt while stirring the waste aluminum melt, and then add When removing the magnesium flux, the temperature of the waste aluminum melt is controlled at 780°C. The method of adding the magnesium removal flux is to pre-press the magnesium removal flux into a block, and then add it to the waste aluminum melt in the form of a block, and press it into The technological process of the block is: mix the magnesium-removing flux, the ...

Embodiment 2

[0028] A) To prepare magnesium removal flux, put 10% of manganese chloride, 30% of calcium chloride, 10% of aluminum fluoride, 20% of activated carbon, 20% of calcium oxide and 10% of magnesium carbonate weighed by mass into a stirring Such as in a stirred tank, stir 2min with a stirrer at a speed of 240rpm to obtain a magnesium-removing flux for use;

[0029] B) Waste aluminum smelting, first put the waste aluminum into the smelting furnace and melt it into waste aluminum melt, then add the magnesium removal flux obtained in step A) into the waste aluminum melt while stirring the waste aluminum melt, and then add When removing the magnesium flux, the temperature of the waste aluminum melt is controlled at 720°C. The method of adding the magnesium removal flux is to pre-press the magnesium removal flux into a block, and then add it to the waste aluminum melt in the form of a block, and press it into The process of the block is: mix the magnesium removal flux, the binder that i...

Embodiment 3

[0032] A) To prepare magnesium removal flux, put 15% of manganese chloride, 25% of calcium chloride, 25% of aluminum fluoride, 10% of activated carbon, 10% of calcium oxide and 15% of magnesium carbonate weighed by mass into a stirring Such as in a stirred tank, stir 10min with a stirrer at a speed of 120rpm to obtain a magnesium-removing flux for use;

[0033] B) Waste aluminum smelting, first put the waste aluminum into the smelting furnace and melt it into waste aluminum melt, then add the magnesium removal flux obtained in step A) into the waste aluminum melt while stirring the waste aluminum melt, and then add When removing the magnesium flux, the temperature of the waste aluminum melt is controlled at 750°C. The method of adding the magnesium removal flux is to pre-press the magnesium removal flux into a block, and then add it to the waste aluminum melt in the form of a block, and press it into The process of the block is: mix the magnesium removal flux, the binder that ...

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Abstract

The invention relates to a method for removing a magnesium impurity element in waste aluminum regeneration and belongs to the technical field of nonferrous metal regeneration. The method comprises the following steps: mixing 10 to 30 percent of manganese chloride, 10 to 30 parts of calcium chloride, 10 to 30 parts of aluminum fluoride, 5 to 20 percent of active carbon, less than or equal to 20 percent of calcium oxide and 5 to 20 percent of magnesium carbonate into a stirring vessel to obtain magnesium removal solvent; smelting waste aluminum in a smelting furnace to waste aluminum melt, adding the magnesium removal solvent, standing the mixture after the magnesium removal solvent is added to obtain waste aluminum melt with the magnesium removal solvent; removing the magnesium oxide and / or magnesium compound in a slagging-off manner when the magnesium oxide and / or magnesium compound in the waste aluminum melt floats to the surface of the waste aluminum melt; then standing the mixture, pouring after the mixture is discharged from the furnace to obtain the regenerated aluminum alloy with the magnesium impurity element in the waste aluminum being removed. By adopting the method, the yield of the aluminum is not influenced, the impurity elemental magnesium of the aluminum melt is remarkably reduced; the environment is not damaged; the process flow is short, and the industrialized production requirement can be met.

Description

technical field [0001] The invention belongs to the technical field of recycling of nonferrous metals, and in particular relates to a method for removing magnesium impurity elements in regeneration of waste aluminum. Background technique [0002] Scrap aluminum is also called scrap aluminum, which is the abbreviation of scrap aluminum alloy. The recycling of scrap aluminum can greatly save precious non-ferrous metal resources and can embody the spirit of circular economy to the extreme. There are about 12 million tons of various scrap aluminum in the world every year. After regeneration, it becomes usable aluminum alloy material. [0003] Since waste aluminum is mixed with other metal elements (such as Mg, Si, Fe, Cu, etc.) and even non-metallic impurities, it constitutes a certain restrictive factor for obtaining high-performance recycled aluminum alloy materials. As far as magnesium is concerned, its greatest role in aluminum alloys is to improve the corrosion resistance ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B21/06C22B9/10C22B9/05C22B7/00
CPCC22B21/0069C22B21/062Y02P10/20
Inventor 孙德勤戴国洪
Owner HUAWEI TEHCHNOLOGIES CO LTD
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