| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that: when the current collector (aluminum foil) on a positive electrode material side and the curent collector (copper foil) on a negative electrode material side are separated by dry process and without melting, a material having a high metal content ratio of aluminum and copper (aluminum-copper grain-state material) is produced in a mixed state; even though they can be utilized as an additive material for steel or the like, and as lithium is contained even by only a little, they cannot be utilized as the additive material for aluminum alloy.SOLUTION: In the method for producing aluminum-copper alloy from lithium ion secondary battery, when charging and melting the aluminum-copper grain-state material into a furnace, the lithium component is removed from the metal side; as a concrete technique, a molten salt layer is provided on top of the lower hot-melt, and the aluminum-copper grain-state material is charged thereinto; the aluminum and copper are warmed and melt, and go out from the molten salt layer and migrate and mix into the lower hot-melt, but the lithium component is separated and adsorbed to the molten salt layer to remain therein; also, as the molten salt layer blocks between the air and molten metal side, the amount of slag is less, and the yield is good, therefore the recycling without waste is possible; and when the molten salt layer is a salt bath layer, it is more preferable, as the lithium combines with chloride and stably remains in the salt bath layer side.SELECTED DRAWING: Figure 3 |
