How do you separate iron and aluminum cans?

To separate iron and aluminum cans, you can use a magnet, as iron is magnetic while aluminum is not. When you pass a magnet over a mixed collection of cans, the iron cans will be attracted to the magnet and can be easily removed. Alternatively, advanced sorting technologies like eddy current separators can also be used, which exploit the different conductive properties of metals to efficiently separate aluminum from iron.