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<\/p>\nAt present, the rotating degassing method is the most widely used method.<\/p>\n
In the process of smelting and casting of recycled aluminum alloy, the molten metal contacts the furnace gas and the atmosphere, and a series of physical and chemical reactions occur to generate gases and oxides. The gas and inclusions in the alloy ingot cause the ingot to produce peeling, delamination, and tearing during processing and deformation, and reduce the strength and plasticity of the metal or alloy. The absorbed gas will cause the sheet to bubble, resulting in the so-called “Hydrogen embrittlement” causing the material to fracture. Therefore, it must be degassed before aluminum ingot casting.<\/p>\n
In the rotating degassing method, inert gas or active gas is introduced into the melt through a rotor of a certain shape. Relying on the high-speed rotation of the rotor to break up the bubbles. During the floating process of the bubbles, the hydrogen and solid inclusions are brought out of the melt surface by the principle of partial pressure difference and the principle of adsorption, so as to achieve the purification effect.<\/p>\n
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