Originally Posted By: Schmoe
Good read. That 4:1 ratio was surprizing....wonder what they do with the left over 3 tons?
Mostly you breathe it.
The mineral form has around 3 oxygen atoms per Al atom (plus some hydrogen etc.)... the electrolytic process releases most of that.
Spare mineral matter (dross/slag) is obviously concentrated over it's "natural" form, and is either buried, used in cement/concrete (like powerstation fly ash, silica fume, and blast furnace slag)...some of the more toxic waste even makes it into your drinking water.