Principle: add the processed copper material into the copper dissolving tank. The larger the surface area of the copper material, the better. There should be a small gap between the copper materials to increase the reaction area. After a certain amount of pure water and sulfuric acid are added, compressed air is introduced for oxidation reaction to generate copper sulfate solution. The chemical reaction formula is: 2Cu+2H2SO4+O2=2CuSO4+2H2O. The reaction belongs to solid liquid, solid gas and liquid gas multiphase reactions. The reaction speed is related to the total surface area of copper in the tank. The larger the surface area is, the faster the reaction speed will be. Secondly, it is related to the air volume, which increases the reaction speed.

Foil making raw material requirements: the thinner the copper foil is, the higher the quality grade is, and the lower the impurity content in the electrolyte is required. In order to ensure the quality of copper foil, the purity of copper must be greater than 99.9%.