Method for recycling waste aluminum material to manufacture aluminum casting

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...

AI Technical Summary

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 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 protection.