Method for recycling aluminum alloy scrap

A method for recycling an aluminum alloy scrap, wherein the method comprises the following steps:

• performing selective oxidation roasting and washing treatment on the aluminum alloy scrap, thereby paint-removing and oil-removing to obtain an uncoated aluminum alloy scrap;
• melting the uncoated aluminum alloy scrap in a refining furnace to obtain aluminum alloy melt liquid, online-detecting components of the aluminum alloy melt liquid, and adding a metallic copper, a copper alloy, a magnesium alloy or a zinc alloy to the aluminum alloy melt liquid according to requirements of target alloy components, performing pressure-controlled and oxygen-controlled melting through regulating pressure intensity and oxygen partial pressure in the refining furnace and coupling an external-field stirring mode, to obtain refining aluminum alloy melt liquid;
• condensing and liquefying volatile elements volatilized in a pressure-controlled and oxygen-controlled melting process to separate from the refining aluminum alloy melt liquid, in the absence of volatile elements, eliminating the condensing and liquefying step;
• filtering the refining aluminum alloy melt liquid, to obtain an aluminum alloy melt having target alloy components;
• and
• casting the aluminum alloy melt.