Method for recycling waste aluminum material to manufacture aluminum casting

A technology for scrap aluminum and aluminum castings, applied in the metallurgical industry, can solve the problems of floating dust, unfavorable environmental protection, environmental damage, etc., and achieve the effects of improving extensibility and fluidity, improving casting stickiness, and reducing harmful hydrogen components

Inactive Publication Date: 2016-01-27
LINZHOU LINFENG ALUMINUM & ELECTRICITY
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  • Summary
  • Abstract
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Problems solved by technology

This waste contains a certain amount of aluminum-containing compounds, and its composition and structure are relatively complex. It is difficult to recover the aluminum contained in it by the usual acid-dissolving or alkali-dissolving process; Generate dust in...

Method used

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Embodiment

[0018] A method for recycling and manufacturing aluminum castings from waste aluminum, comprising the steps of:

[0019] a. Screening: Magnetic separation of waste aluminum to remove iron, magnetic separation or manual sorting to remove other impurities; then dehydration and degreasing of waste aluminum after removal of impurities at 300~400°C;

[0020] b. Smelting: Weigh the raw aluminum and put it into the melting furnace to melt it at a temperature of 850~950°C to form raw aluminum liquid, then add 5~8% of the total mass of raw aluminum to the raw aluminum liquid, and then add the waste aluminum material obtained in step a, and stir Melting to obtain mixed aluminum liquid;

[0021] c. Pouring: pouring the mixed aluminum liquid obtained in step b into a casting mold to obtain an aluminum casting.

[0022] The waste aluminum material described in step a is waste profiles or scraps of waste profiles.

[0023] The stirring in step b is mechanical stirring, electromagnetic sti...

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Abstract

The invention provides a method for recycling a waste aluminum material to manufacture aluminum casting. The method comprises the following steps: a, screening: magnetically separating the waste aluminum material to remove iron, magnetically separating or manually sorting to remove other impurities; and carrying out dehydration and oil removal on the impurity-removed waste aluminum material at a temperature of 300-400 DEG C; b, smelting: weighing and adding crude aluminum into a smelting furnace for being molten into crude molten aluminum at a temperature of 850-950 DEG C, then, adding the waste aluminum material, which accounts for 5-8% of the total mass of the crude aluminum, obtained in the step a into the crude molten aluminum, and stirring and melting to obtain mixed molten aluminum; and c, casting: casting the mixed molten aluminum obtained in the step b into a casting mould to obtain the aluminum casting. The method has the advantages of being simple in process, high in waste aluminum adaptation, low in cost, high in aluminum recovery rate, and the like.

Description

technical field [0001] The invention belongs to the technical field of metallurgical industry, and in particular relates to a method for recycling and manufacturing aluminum castings from waste aluminum materials. Background technique [0002] Waste aluminum ash is the waste from electrolytic aluminum plants and waste from various aluminum processing industries, and the remaining secondary industrial waste after the aluminum recycling operation. This waste contains a certain amount of aluminum-containing compounds, and its composition and structure are relatively complex. It is difficult to recover the aluminum contained in it by the usual acid-dissolving or alkali-dissolving process; Floating dust is generated in the air, causing air pollution and environmental damage in surrounding areas. At present, most of the processing methods for its waste aluminum ash are piled up or buried, which will cause environmental pollution again and is not conducive to environmental protect...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B21/00
CPCY02P10/20
Inventor 秦保军杨志勇郭庆峰张银生叶进京
Owner LINZHOU LINFENG ALUMINUM & ELECTRICITY
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