At present, the scale of production of Color Coated Aluminum Coil in China is gradually expanding, and the requirements for aluminum liquid purification are getting higher and higher. Only with great breakthroughs in technology can we adapt to the development of the domestic aluminum industry. The production of aluminum requires very high quality of casting metallurgy and high content of hydrogen and oxide inclusions. Therefore, the research on the basic theory and purification process of aluminum liquid must be improved to improve the quality of melt treatment in order to meet the requirements of aluminum production.

The current problems in the purification process of aluminum liquid mainly include:

(1) The energy consumption and purified gas consumption are large, and the energy consumption and gas consumption per ton for producing the same kind of aluminum processing products are much higher than those of foreign countries.

(2) The refining and degassing level of aluminum joints are low. The produced aluminum ingots have high hydrogen content and oxidation inclusion content, which exceed the product quality requirements, resulting in low market competitiveness of some quality and relatively isolated aluminum processed products. Such products are often imported as required to meet the market requirements.

(3) When processing aluminum melt, only degassing, deslagging, alkali metal removal and cost reduction are usually paid attention to, but the control requirements for degassing, deslagging and alkali metal removal are not strict, resulting in the reduction of product quality.

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